SYSTEM IMPACT STUDY FINAL REPORT 115 kV CLUSTER ...

SYSTEM IMPACT STUDY

FINAL REPORT

115 kV CLUSTER STUDY

Prepared for:

El Paso Electric Company

Prepared by:

TRC Engineers, LLC 1526 Cole Boulevard

Building 3, Suite 150

Lakewood, CO 80401

(303) 395-4018

November 2014

115 kV Cluster 2014 System Impact Study TRC November 2014 i

FOREWORD

This report was prepared for the project Interconnection Customer, by System Planning at El Paso

Electric Company. Any correspondence concerning this document, including technical and commercial

questions should be referred to:

David Tovar

Manager – System Planning Department


100 North Stanton, Loc. 751

El Paso, Texas 79901

Phone: (915) 543-4355

Fax: (915) 521-4763

or

David Gutierrez

Principal Engineer


100 North Stanton, Loc. 751

El Paso, Texas 79901

Phone: (915) 543-4083

Fax: (915) 521-4763

115 kV Cluster 2014 System Impact Study TRC November 2014 ii

Table of Contents

EXECUTIVE SUMMARY ......................................................................................................................................... 1

1.0 INTRODUCTION .............................................................................................................................................. 4

1.1 PERFORMANCE CRITERIA ................................................................................................................................. 4

2.0 STUDY METHODOLOGY .............................................................................................................................. 6

2.1 ASSUMPTIONS .................................................................................................................................................. 6

2.2 PROCEDURE ..................................................................................................................................................... 6

2.2.1 Development and Description of Cases ................................................................................................. 6

2.2.2 115 kV Cluster Study Generation Modeling .......................................................................................... 6

2.2.3 Contingency List .................................................................................................................................... 7

3.0 STEADY STATE POWER FLOW ANALYSIS ............................................................................................. 8

3.1 PRE-PROJECT POWER FLOW EVALUATION ....................................................................................................... 8

3.1.1 Pre-Project N-0 Flow Violations ........................................................................................................... 8

3.1.2 Pre-Project N-1 Flow Violations ........................................................................................................... 8

3.2 POST-PROJECT POWER FLOW EVALUATION ..................................................................................................... 8

3.2.1 Post-Project N-0 Power Flow Analysis ................................................................................................. 8

3.2.2 Post-Project N-1 Power Flow Analysis ................................................................................................. 8

3.3 POWER FLOW ANALYSIS CONCLUSION ............................................................................................................ 9

4.0 STEADY STATE VOLTAGE ANALYSIS ................................................................................................... 10

5.0 SHORT CIRCUIT ANALYSIS ...................................................................................................................... 11

5.1 SHORT CIRCUIT ANALYSIS MODELING .......................................................................................................... 11

5.2 SHORT CIRCUIT ANALYSIS PROCEDURE ......................................................................................................... 11

5.3 SHORT CIRCUIT ANALYSIS RESULTS AND CONCLUSION ................................................................................ 12

6.0 STABILITY ANALYSIS ................................................................................................................................. 13

6.1 DYNAMIC MODELING .................................................................................................................................... 13

6.2 STABILITY STUDY CASE DEVELOPMENT ........................................................................................................ 13

6.3 STABILITY ANALYSIS RESULTS ...................................................................................................................... 13

6.4 STABILITY ANALYSIS CONCLUSION ............................................................................................................... 14

7.0 COST ESTIMATES, ONE-LINES, & PROJECT SCHEDULE ................................................................. 16

8.0 DISCLAIMER.................................................................................................................................................. 21

9.0 CONCLUSIONS .............................................................................................................................................. 22

115 kV Cluster 2014 System Impact Study TRC November 2014 iii

List of Tables

Table 1-1: EPE and New Mexico Performance Criteria ............................................................................... 5

Table 3-1: Generator Short Circuit Modeling Data ...................................................................................... 8

Table 5-1: Generator Short Circuit Modeling Data .................................................................................... 11

Table 6-1: Stability Post-Project Case Scenarios ........................................................................................ 13

Table 6-2: Transient Stability Analysis Results for both Peak and Off-Peak Cases ................................... 15

Table 7-1: Cost Estimate by Project ........................................................................................................... 16

Table 7-2: EPE Interconnection Facilities Costs for POI Stations ............................................................. 19

Table 7-3: EPE Network Upgrade Costs for the CO70S POI Station ........................................................ 19

Table 7-4: EPE Network Upgrade Costs for the DS90S POI Station ......................................................... 20

List of Figures

Figure 7-1: CO70S POI and CO70S 115 kV Station One line ................................................................... 17

Figure 7-2: DS90S POI and DS90S 115 kV Station One line .................................................................... 18

Appendices

Appendix A ......................................................... 115 kV Cluster System Impact Study Statement of Work

Appendix B .................................................................................................... Power Flow Contingency List

Appendix C .............................................................................................................. Dynamic Modeling Data

Appendix D .............................................................................................................................. Stability Plots

Appendix E .............................................................................................. Worst Condition Analysis Results

Appendix F .......................................................................................................................... Project Schedule

115 kV Cluster 2014 System Impact Study TRC November 2014 1

115 kV Cluster System Impact Study

EXECUTIVE SUMMARY

The study objective was to determine the impact that the proposed 115 kV Cluster Study generation

would have on the El Paso Electric Company (EPE) and Southern New Mexico transmission systems.

The proposed 115 kV Cluster Study generation is comprised of a 90 MW PV solar powered project

(DS90S) interconnected between EPE’s Diablo and Santa Teresa Substations and another 70 MW PV

solar powered project (C070S) interconnected between EPE”s Chaparral and Oro Grande Substations.

The proposed Commercial Operation dates for the two projects included in this System Impact Study

(SIS) are identical, and as follows:

1. October 1, 2016 for First Unit Power Block

a. Total of 5 MW for each project (DS90S & CO70S)

2. December 1, 2016 for Entire Facilities

a. Total of 90 MW for DS90S

b. Total of 70 MW for CO70S

The only interconnection project in the EPE study queue that has an Interconnection Agreement (IA) with

EPE is the Montana Power Station. This project is currently under construction and will consist of four

(4) 105 MW gas powered units, located about 3 miles east of EPE’s Caliente Substation

The Montana Power Station has been included in the base cases for this SIS. The generation from this

project will be delivered to serve EPE native load.

The Study Areas for the analysis were limited to WECC Areas 11 - EPE and 10 - PNM.

Steady State Results

The power flow analysis was conducted for 2016 Light Winter and 2017 Heavy Summer load conditions.

The Arroyo Phase Shifter was set to regulate N-S Flows in all cases (10-25 MW under Heavy loads and

140-150 MW under Light loads).

The analysis showed that with these Network Upgrades in place, the East Cluster generation does not

have an adverse impact on the EPE and Southern New Mexico transmission systems. The power flow

analysis results showed that the addition of 115 kV Cluster generation would not require any Network

Upgrades other than the 115 kV switching stations to allow for the 2 interconnections.

Short Circuit Results

A short circuit analysis was performed to determine if the addition of the 115 kV Cluster Study

generation would cause any of the EPE or Southern New Mexico transmission system’s existing

substation circuit breakers to exceed their interrupting capability ratings.

The results of this short circuit study show that the maximum fault currents after the 115 kV Cluster

generation is placed in service did not exceed the breaker interrupting capability at any substation on the

EPE or Southern New Mexico transmission system.


Stability Results

Transient System stability was analyzed for faults relevant to the DS90S & CO70S Study Areas under

heavy and light load conditions. The stability results showed that the addition of the new generation

projects does not cause any adverse impacts to the system stability performance in the Study Area.

Cost Estimates and Schedule

Good faith cost estimates are presented. The cost estimates are in 2014 dollars (no escalation applied)

and are based upon typical construction costs for previously performed similar construction. These costs

include all estimated applicable labor and overheads associated with the engineering, design, and

construction of these new EPE facilities. These estimates did not include the Generator Interconnection

Costs1 for any other Interconnection Customer owned equipment or associated design and engineering

except for the Point of Interconnection (POI) facilities.

The estimated total cost for the required upgrades is $5.16 Million for each project (both CO70S and

DS90S) in the 115 kV Cluster. This breaks down to $0.27 Million for the EPE Interconnection Costs2

at the POI and $4.89 Million for Network Upgrade Costs3 for both 115 kV Cluster projects.

Generator Interconnection Costs have not been estimated as part of this study. Table 0-1 details the cost

per year.

Table 0-0-1: Cost Estimate by Project

Project Item

EPE

Interconnection

Network

Upgrade

Cost

Interconnection

plus Network

Upgrades Totals

Cost (in

millions) (in millions)

(in millions)

CO70S CO70S Interconnection

Station Construction $0.27 $4.89 $5.16

Subtotal CO70S $ 5.16 M

DS90S DS90S Interconnection


Subtotal DS90S $ 5.16 M

The estimated time frame for Engineering, Procurement, and Construction of Network Upgrades is

approximately 19 months upon notice to proceed with construction from the Interconnection Customers.

1 Generator Interconnection Costs: cost of facilities paid for by Interconnection Customer and owned and

operated by the Interconnection Customer from the generator facilities to the Change of Ownership Point, which

is typically on the first dead-end at the Point of Interconnection substation. Not subject to transmission credits.

2 EPE Interconnection Costs: cost of facilities paid for by Interconnection Customer but owned and operated by

EPE from the Change of Ownership Point to the Point of Interconnection. Not subject to transmission credits.

3 Network Upgrades Costs: cost of facilities from the Point of Interconnection outward, paid for by the

interconnector but owned and operated by EPE. Subject to transmission credits


Conclusion

This System Impact Study shows that the proposed 115 kV Cluster generation will NOT have an adverse

impact on the EPE and Southern New Mexico transmission systems.


1.0 INTRODUCTION

EPE requires that a SIS be performed for generation facilities desiring to connect to the El Paso Electric

Transmission System. Since both Interconnection Requests for this 115 kV Cluster Study (2014) have

proposed a 115 kV Point of Interconnect (POI),and thus, this SIS was completed to determine any

possible impacts the combined 160 MW of proposed generation from the two projects would have on

EPE’s Transmission System.

The proposed Commercial Operation dates for these two projects are identical, and as follows:

1. October 1, 2016 for First Unit Power Block

a. Total of 5 MW for each project (DS90S & CO70S)

2. December 1, 2016 for Entire Facilities

a. Total of 90 MW for DS90S

b. Total of 70 MW for CO70S

1.1 Performance Criteria

The Study was performed in accordance with Western Electricity Coordinating Council (WECC), North

American Electric Reliability Corporation (NERC), and EPE standards. The EPE local reliability

standards can be found in Section 4 of EPE’s FERC Form No. 715. The steady state and stability analysis

was performed using GE’s PSLF Version 18.1 power flow software program.

Transformer tap and phase-shifting transformer angle movement, as well as static VAR device switching,

were allowed for the steady state pre-contingency analysis. All regulating equipment such as transformer

controls and switched shunts were fixed at pre-contingency positions when the contingency analysis was

performed. All facility loadings, as well as voltages 69 kV and greater, were monitored within the El

Paso and New Mexico control areas.

Pre-contingency and Post-contingency flows on lines and transformers were required to remain at or

below the normal rating, while post-contingency flows on lines and transformers were required to remain

at or below the emergency rating. Flows above 100% of an element’s pre- or post-contingency rating

were considered violations.

Post-project voltage criteria violations that either exacerbate or improve an existing pre-project violation

were not considered an adverse impact to the system.

The performance criteria utilized in qualifying violations in the study area are shown in Table 1-1.


Table 1-1: EPE and New Mexico Performance Criteria

* Taiban Mesa and Guadalupe 345 kV bus voltage must be between 0.95 and 1.10 p.u. under normal and

contingency conditions.

** For PNM buses in southern New Mexico the allowable N-1 voltage drop is 7%.

*** Provided operator action can be utilized to adjust voltages back down to 1.05

Area Conditions Loading Limits Voltage (p.u.) Voltage

Drop

Application

EPEC

Normal Normal Rating

0.95 - 1.05 69kV and above

0.95 - 1.10 Artesia 345 kV

0.95 - 1.08 Arroyo 345 kV PST source side

0.90 - 1.05 Alamo, Sierra Blanca and Van

Horn 69kV

Contingency Emergency

Rating

0.925 - 1.05 7% 60 kV to 115 kV

0.95 - 1.07 7% Artesia 345kV

0.95 - 1.08 7% Arroyo 345kV PST source side

0.90 - 1.05 Alamo, Sierra Blanca and Van

Horn 69kV

0.95 - 1.05 7% Hidalgo, Luna, or other 345 kV

buses

PNM

Normal ALIS Normal Rating 0.95-1.05 46 kV and above*

Contingency

N-1

Emergency

Rating

0.925-1.08*** 6 %** 46 kV to 115 kV

0.90 – 1.08*** 6 %** 230 kV and above

Contingency

N-2

Emergency

Rating 0.90-1.08*** 10 % 46 kV and above*

Tri-

State

Normal ALIS Normal Rating 0.95-1.05 All buses

Contingency

N-1

Emergency

Rating

0.90 – 1.10 6 %

Tri-State buses in the PNM

Service Area (list provided by Tri-

State)

0.90-1.10 7 %

Tri-State buses in southern and

northeastern New Mexico (list

provided by Tri-State)

Contingency

N-2

Emergency

Rating

0.90-1.10 10% All buses


2.0 STUDY METHODOLOGY

2.1 Assumptions

The following assumptions are consistent for all study scenarios unless otherwise noted.

This study assumed that all system expansion projects as planned by area utilities by the year

under analysis are completed, and that any system improvements required by the interconnections

senior to the 115 kV Cluster Study generation are implemented.

This study did not analyze any transmission service from the interconnection point to any specific

point on the grid for the interconnections senior to the 115 kV Cluster Study generation.

2.2 Procedure

The analyses in this study included Steady State, Transient Stability, and Short Circuit Breaker Analysis

as stated in the 115 kV Cluster Study SIS Statement of Work in Appendix A. A description of the

procedures used to complete the analyses is presented below.

2.2.1 Development and Description of Cases

Two benchmark cases without the proposed 115 kV Cluster Study generation were created using 2017

Heavy Summer (Peak) and 2016 Light Winter (Off Peak) load scenarios. The combined 160 MWs of

Solar Cluster generation was then modeled as being dispatched to serve EPE system native load in post

project cases under the same two load scenarios.

The Arroyo Phase Shifter was modeled to provide 10-20 MW N-S flow under peak load conditions and

140-150 MW N-S flow during the off peak load conditions.

The Montana Power Station project was included in both benchmark cases.

This project is currently under construction and will consist of four (4) 105 MW gas powered units

located about 3 miles east of Caliente Substation. The generation from the Montana Power Station

project will be delivered to serve native EPE load.

2.2.2 115 kV Cluster Study Generation Modeling

The 115 kV Cluster generation consists of two (2) Photo Voltaic (PV) Solar installations located on

separate sides of EPE’s service territory.

The first PV installation plans to interconnect at a new 115 kV tap between the Santa Teresa and Diablo

Substations. It would be located about 2 miles southeast of the Santa Teresa Station. The requested

maximum output of this project is 90 MW. This project would be comprised of 24 PV inverters each

producing approximately 4 MW when at full output.

Similarly, the second PV installation plans to interconnect at a new 115 kV tap between the Oro Grande

and Chaparral Substations. It would be located about 10 miles northeast of the Chaparral Station. This

project would use the same 4 MW inverters as the first PV installation, but this second installation would

only consist of 18 inverters to produce a maximum requested output of 70 MW when at full output.


The PV inverters proposed for both projects are expected to produce 4.141 MW at 0.55 kV. This initial

voltage would be immediately stepped up to a 34.5 kV collector system voltage planned for both PV

installations. A 115/34.5 kV transformer at each of the proposed projects’ new buses would then step up

the collector system voltage to the 115 kV EPE Transmission System voltage.

2.2.3 Contingency List

All outages (69 kV and above with EPE) were modeled in the subsystem files. The list of contingencies

used in this study can be found in Appendix B. Based on engineering judgment, these contingencies were

selected to represent a good cross section of potential contingencies that would stress the EPE and PNM

southern New Mexico systems. This study was performed for N-0 and N-1 conditions.


3.0 STEADY STATE POWER FLOW ANALYSIS

3.1 Pre-Project Power Flow Evaluation

Peak and off peak base cases were evaluated for thermally overloaded facilities under both normal and

contingency conditions prior to the addition of the 115 kV Cluster generation.

3.1.1 Pre-Project N-0 Flow Violations

Power flow study analysis results showed no overloaded transmission facilities were present in the El

Paso Electric (EPE) and Public Service Company of New Mexico (PNM) areas under non-contingency

system conditions prior to the addition of the East Cluster generation.

3.1.2 Pre-Project N-1 Flow Violations

Power flow contingency analysis results show a few overloads existed in El Paso and New Mexico areas

prior to the addition of the 115 kV Cluster generation. Table 3-1 shows the N-1 pre-project overloads in

the final study cases.

Table 3-1: Generator Short Circuit Modeling Data

From Bus

kV

To Bus

kV

ID

Area

Rating

(MVA)

Contingency

2016lw 2017hs

% of Emergency

Rating

TURQUOIS 115 HIDALGO 115 1 11 140.0 LUNA 345/115 kV

TRAN 103.0 106.0

TURQTAP 69 TYRONE 69 1 11 100.0 MD-TURQUOISE

115 kV 100.9 103.3

LORDSBRG 115 LORDSBRG 69 1 11 134.0 HIDALGO-

TURQUOISE 115 kV 87.7 103.9

3.2 Post-Project Power Flow Evaluation

This section provides a high-level understanding of the 115 kV Cluster impact on the loading of

transmission lines and transformers in the Study Area. The analysis was performed under both normal

and contingency conditions.

3.2.1 Post-Project N-0 Power Flow Analysis

Power flow study results for the EPE and PNM areas showed that the 115 kV Cluster projects did not

cause any power flow violations under non-contingency system conditions.

3.2.2 Post-Project N-1 Power Flow Analysis

The contingency list described in Section 2.2.3 was used to test projects DS90S and CO70S under N-1

conditions. The power flow study results for the EPE and PNM areas showed that projects did not cause

any power flow violations under contingency system conditions.


3.3 Power Flow Analysis Conclusion

The analysis showed that the addition of the 115kV Cluster generation to the system would not cause any

thermal overloads on the EPE or New Mexico transmission systems.


4.0 STEADY STATE VOLTAGE ANALYSIS

Bus voltages within the Study Area were evaluated under both normal and contingency conditions, with

and without the 115kV Cluster generation in service. The Performance Criteria shown in Error!

Reference source not found. were considered when analyzing bus voltages for violations.

The voltage analysis results showed that after the addition of the 115kV Cluster generation the Study area

transmission network voltages stayed within criteria limits, and did not significantly change from the pre-

project voltage levels.


5.0 SHORT CIRCUIT ANALYSIS

A short circuit analysis was performed to determine if the addition of the 115 kV Cluster generation to the

EPE transmission system would cause any of EPE’s transmission system’s existing substation circuit

breakers to exceed their interrupting capability ratings.

5.1 Short Circuit Analysis Modeling

Pre-project and Post-project cases were developed to perform this analysis. As mentioned, any planned

or proposed third party generation listed in EPE’s study queue ahead of 115 kV Cluster generation was

also modeled in the cases. The generator and collector system impedance data used in the study is shown

in Table 5-1.

This analysis evaluated the impact of the DS90S & CO70S generation by comparing the pre- and post-

project fault current levels at selected buses.

Table 5-1: Generator Short Circuit Modeling Data

Project

Total

Output

(MW)

Interconnection Customer

GSU

Unit

ID

Pmax

(MW)

Qmax

(MVAR)

Qmin

(MVAR)

Z sub-

transient

Rating

(MVA)

Voltage

(kV)

Z

Sub-

transient

DS90S 99 1 99 27.8 -27.8 0.000

+j0.9 100 115/34.5

0.00261

+j0.09143

CO70S 74 1 105 20.9 -20.9 0.000

+j0.9 78 115/34.5

0.00299+j0.

0899

5.2 Short Circuit Analysis Procedure

The initial short circuit analysis was performed with all other third-party generation projects ahead of the

115 kV Cluster generation in the study queue in service and 115 kV Cluster generation out of service.

This identified the “base case” fault duties of the circuit breakers. The short circuit analysis was

performed again with 115 kV Cluster generation in service.

Three phase, two phase, and single-phase line-to-ground faults were simulated at selected buses in the

EPE system with terminal voltages at 69 kV and above. EPE also requested faults on all transformer

tertiary buses. ASPEN One Liner and Batch Short Circuit Module were used to perform the short circuit

analysis. The short circuit fault analyses were performed with the following settings:

Transmission line G+jB ignored.

Shunts with positive sequence impedance ignored.

Transformer line shunts ignored

The pre-fault voltage was calculated using a Flat bus voltage of 1.05 per unit.

Fault currents within the EPE System where analyzed before and after the addition of the 115 kV Cluster

projects. These scenarios were compared against the smallest breaker interruption ratings at each

substation to determine whether any breaker was overdutied under pre-project or post-project conditions.


5.3 Short Circuit Analysis Results and Conclusion

The results of this short circuit study showed that DS90S and CO70S would have only minor impacts to

the fault currents on the EPE and Southern New Mexico system. The study also showed that the fault

currents produced by the Cluster generation will not exceed the interrupting capability of any existing or

proposed circuit breakers on the EPE or Southern New Mexico system.


6.0 STABILITY ANALYSIS

A Transient Stability analysis was performed under peak and off-peak load conditions to determine the

degree of impact the Projects may have on the EPE and Southern New Mexico transmission system

performance. This analysis evaluated the performance of the system for selected faults. The purpose of

this analysis is to ensure the system has adequate damping after a fault/trip event.

The simulations were conducted using the PSLF power flow and dynamic simulation software, General

Electric, Inc. PSLF load flow software package, Version 18.1 and the associated “DYTools” module.

Dynamic stability simulations were conducted for peak and off-peak load conditions with the 115 kV

Cluster generation units off, and on at full capacity.

6.1 Dynamic Modeling

EPE provided the base cases and dynamic file data base for this part of the study. The Interconnection

Customers provided the detailed model data sheets and/or parameter values.

The DS90S generation was modelled as a single PV inverter unit with capacity of 92 MW. Similarly, the

CO70S generation was modelled as a single PV inverter unit with capacity of 72 MW.

The detailed PSLF model data for these projects (DS90S & CO70S) can be found in Appendix C.

6.2 Stability Study Case Development

Two base cases were used to simulate Peak and Off-Peak conditions. These base cases were modified to

include the DS90S & CO70S projects. The analysis compared the system response to the fault

simulations before and after the 115kV Cluster generation was added. The two dynamic study cases are

listed in Table 6-1.

Table 6-1: Stability Post-Project Case Scenarios

Descriptions

2017 Heavy Load Case 2016 Light Load Case

DS90S (92 MW) in service

CO70S (72 MW) in service

Arroyo PST 10-20 MW N-S

Afton in service

DS90S (92 MW) in service

CO70S (72 MW) in service

Arroyo PST 150-160 MW N-S

Afton out of service

6.3 Stability Analysis Results

The stability analysis showed that the EPE and Southwestern New Mexico transmission system remained

stable for all simulated faults before and after the addition of the Project.

Simulated fault locations, time durations, and system response are shown in Table 6-2. The stability plots

of these faults can be found in Appendix D.

Worst Condition Analysis (WCA) did not reveal any frequency or voltage criteria violations as the result

of the 115kV Cluster projects. The WCA results can be found in Appendix E.


6.4 Stability Analysis Conclusion

The study area remains stable and well damped for all the faults analyzed. The addition of the 115 kV

Cluster projects does not pose any concern to system stability performance.


Table 6-2: Transient Stability Analysis Results for both Peak and Off-Peak Cases

2014 SIS – MO420G 105 MW Output Results

Name Fault

Location Event Description Clearing (cycles)

2016 Light Load 2017Peak Load

Projects

Off

Projects

On

Projects

Off

Projects

On Tran1 Newman Three Phase fault at Newman 345 kV bus. Newman 345/115 kV tran. = 4.0 Stable Stable* Stable Stable* Tran2 Newman Three Phase fault at Newman 115 kV bus. Newman 345/115 kV tran. = 4.0, Stable Stable* Stable Stable* Tran3 Caliente Three Phase fault at Caliente 345 kV bus. Caliente 345/115 kV tran. = 4.0, Stable Stable* Stable Stable*

Line1 Caliente Three Phase fault at Caliente 345 kV bus. Caliente 345 kV = 4.0, Amrad 345 kV = 4.0 Stable Stable* Stable Stable* Line2 Caliente Three Phase fault at Caliente 345 kV bus. Caliente 345 kV = 4.0, Picante 345 kV = 4.0 Stable Stable* Stable Stable* Line3 Picante Three Phase fault at Picante 345 kV bus. Picante 345 kV = 4.0, Caliente 345 kV = 4.0 Stable Stable* Stable Stable* Line4 Newman Three Phase fault at Newman 345 kV bus. Newman 345 kV = 4.0, Picante 345 kV = 4.0 Stable Stable* Stable Stable* Line5 Picante Three Phase fault at Picante 345 kV bus. Picante 345 kV = 4.0, Newman 345 kV = 4.0 Stable Stable* Stable Stable* Line6 Newman Three Phase fault at Newman 345 kV bus. Newman 345 kV = 4.0, Afton 345 kV = 4.0 Stable Stable* Stable Stable* Line7 Afton Three Phase fault at Afton 345 kV bus. Newman 345 kV = 4.0, Afton 345 kV = 4.0 Stable Stable* Stable Stable* Line8 Newman Three Phase fault at Newman 345 kV bus. Newman 345 kV = 4.0, Arroyo 345 kV = 4.0 Stable Stable* Stable Stable* Line9 Diablo Three Phase fault at Diablo 345 kV bus. Diablo 345 kV = 4.0, Luna 345 kV = 4.0 Stable Stable* Stable Stable* Line10 Newman Three Phase fault at Newman 115 kV bus. Newman 115 kV = 4.0, Chaparral 115 kV = 4.0 Stable Stable* Stable Stable* Line11 Chaparral Three Phase fault at Chaparral 115 kV bus. Newman 115 kV = 4.0, Chaparral 115 kV = 4.0 Stable Stable* Stable Stable* Line12 Santa Teresa Three Phase fault at Santa Teresa 115 kV bus. Santa Teresa 115 kV = 4.0, DS90S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line13 DS90S POI Three Phase fault at DS90S POI 115 kV bus. Santa Teresa 115 kV = 4.0, DS90S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line14 NW2 Three Phase fault at NW2 115 kV bus. NW2 115 kV = 4.0, DS90S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line15 DS90S POI Three Phase fault at DS90S POI 115 kV bus. NW2 115 kV = 4.0, DS90S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line16 Chaparral Three Phase fault at Chaparral 115 kV bus. Chaparral 115 kV = 4.0, CO70S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line17 CO70S POI Three Phase fault at CO70S POI 115 kV bus. Chaparral 115 kV = 4.0 CO70S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line18 CO70S POI Three Phase fault at Oro CO70S 115 kV bus. Oro Grande 115 kV = 4.0, CO70S POI 115 kV = 4.0 Stable Stable* Stable Stable* Line19 Oro Grande Three Phase fault at Oro Grande 115 kV bus. Oro Grande 115 kV = 4.0, CO70S POI 115 kV = 4.0 Stable Stable* Stable Stable*

Gen1 DS90S Unit No Fault DS90S unit Trip DS90S unit Trip = 4.0 (loss of project) N/A Stable* N/A Stable* Gen2 CO70S Unit No Fault CO70S unit Trip CO70S unit Trip = 4.0 (loss of project) N/A Stable* N/A Stable*

Note: Stable - System response stable; Stable* - System response stable and Cluster PV generation units stayed in service.


7.0 COST ESTIMATES, ONE-LINES, & PROJECT SCHEDULE

Good faith cost estimates are presented. The cost estimates are in 2014 dollars (no escalation applied)

and are based upon typical construction costs for previously performed similar construction. These costs

include all estimated applicable labor and overheads associated with the engineering, design, and

construction of these new EPE facilities. These estimates did not include the Generator Interconnection

Costs4 for any other Interconnection Customer owned equipment or associated design and engineering

except for the Point of Interconnection (POI) facilities.

The estimated total cost for the required upgrades is $5.16 Million for each project (both CO70S and

DS90S) in the 115 kV Cluster. This breaks down to $0.27 Million for the EPE Interconnection Costs5

at the POI and $4.89 Million for Network Upgrade Costs6 for both 115 kV Cluster projects.

Generator Interconnection Costs have not been estimated as part of this study. Table 7-1 details the

estimated costs.

Table 7-1: Cost Estimate by Project

Project Item

EPE

Interconnection

Cost

(in millions)

Network

Upgrade

Cost

(in

millions)

Interconnection

plus Network

Upgrades

(in millions)

Totals

CO70S CO70S Interconnection


Subtotal CO70S $ 5.16 M

DS90S DS90S Interconnection


Subtotal DS90S $ 5.16 M

The one-lines seen in Figure 7-1 and Figure 7-2 show the POI substations equipment with a color coded

cost responsibility breakdown.

4 Generator Interconnection Costs: cost of facilities paid for by Interconnection Customer and owned and

operated by the Interconnection Customer from the generator facilities to the Change of Ownership Point, which

is typically on the first dead-end at the Point of Interconnection substation. Not subject to transmission credits.

5 EPE Interconnection Costs: cost of facilities paid for by Interconnection Customer but owned and operated by

EPE from the Change of Ownership Point to the Point of Interconnection. Not subject to transmission credits.

6 Network Upgrades Costs: cost of facilities from the Point of Interconnection outward, paid for by the

interconnector but owned and operated by EPE. Subject to transmission credits


Figure 7-1: CO70S POI and CO70S 115 kV Station One line

115 kV

To

Oro Grande

Existing Chaparral to Oro

Grande 115 kV line

To

Chaparral

9.6 miles

24.8 miles

115 kV

M

Color Code Network Upgrades Existing Facilities EPE Interconnection Facilities Located at POI Interconnection Customer Equipment

CO70S

70 MW

CO70S

Substation


Figure 7-2: DS90S POI and DS90S 115 kV Station One line

115 kV

To

Santa Teresa

Existing Diablo/NW2 to Santa

Teresa 115 kV line

To

Diablo

5.7 miles

2.0 miles

115 kV

M

Color Code Network Upgrades Existing Facilities EPE Interconnection Facilities Located at POI Interconnection Customer Equipment

DS90S

90 MW

DS90S

Substation

1.5 miles


The substations will be identical for each 115 kV Cluster project, so the installation costs for CO70S and

DS90S are also same. Table 7-2 through

Table 7-4 provide a more detailed breakdown of the POI substation construction costs, which are the

same for each interconnection project. The Project Schedule in Appendix F provides a more detailed

breakdown of the estimated time for Engineering, Procurement, Construction and Commissioning.

Table 7-2: EPE Interconnection Facilities Costs for POI Stations

(CO70S & DS90S Costs are Identical)

Element Description Cost Est.

Millions

DS90S POI

Or

CO70S POI

EPE Interconnection Facilities located at CO70S POI or DS90S

POI

One 115 kV 2000 A disconnect switch w/ grounding

One set of CCVT’s and Structures

Three Lightning arresters and Structures

One Set of 115 kV 3-Phase Metering Units and structures

Relaying, communication, and testing

$0.27

Estimated Time Frame for Engineering, Procurement, Construction,

and Commissioning

19 Months

Table 7-3: EPE Network Upgrade Costs for the CO70S POI Station


Millions

CO70S POI

115 kV

Substation

Build a new 115 kV three breaker in a Breaker and a

Half Scheme Substation. The new equipment

required includes:

Three 115 kV 3000 A circuit breakers

Six 115 kV 2000 A disconnect switches

Two 115 kV 2000 A line disconnect switches

w/ grounding

Six sets of CCVT’s and Structures

Six Lightning arresters and Structures

Three sets of Transmission Line Dead-end

Assemblies for Substation Dead-end

One lot 115 kV bus, insulators, and structural

supports

One lot Transmission line relaying, SCADA,

communication, and testing

One lot ground grid, misc. grounding,

concrete, conduit, cable trench, and fencing

Relay Setting Changes will also be needed at

Chaparral and Oro Grande

$4.89

Estimated Time Frame for Engineering,

Procurement, Construction, and Commissioning

24

Months


Table 7-4: EPE Network Upgrade Costs for the DS90S POI Station


Millions

DS90S POI

115 kV

Substation

Build a new 115 kV three breaker in a Breaker and a

Half Scheme Substation. The new equipment

required includes:

Three 115 kV 3000 A circuit breakers

Six 115 kV 2000 A disconnect switches

Two 115 kV 2000 A line disconnect switches

w/ grounding

Six sets of CCVT’s and Structures

Six Lightning arresters and Structures

Three sets of Transmission Line Dead-end

Assemblies for Substation Dead-end

One lot 115 kV bus, insulators, and structural

supports

One lot Transmission line relaying, SCADA,

communication, and testing

One lot ground grid, misc. grounding,

concrete, conduit, cable trench, and fencing

Relay Setting Changes will also be needed at

Diablo and Santa Teresa (and possibly the new

Verde Station)7

$4.89

Estimated Time Frame for Engineering,

Procurement, Construction, and Commissioning

24

Months

7 A new Verde Substation between the Diablo and Santa Teresa stations was scheduled to be in-service in May 2016

but has been delayed until May 2017. The relay setting changes required due to the DS90S project will vary based

on the COD of both the Verde Substation and the DS90S project.


8.0 DISCLAIMER

If any of the project data provided by Interconnection Customer and used in this study varies significantly

from the actual data of the installed generation equipment for both DS90S & CO70S, the results from this

study will need to be verified with the actual data at the Project Interconnection Customer's expense.

Additionally, any change in the generation in EPE’s Interconnection Queue that is senior to the 115 kV

Cluster generation may require a re-evaluation of this Study.


9.0 CONCLUSIONS

This 115 kV Cluster System Impact Study, consisting of a Steady State, Short Circuit and Stability

Analysis, for a net 160 MW of generation interconnecting on the EPE transmission systems, has

demonstrated that the 115 kV Cluster generation will NOT have an adverse impact on the EPE and

Southern New Mexico transmission, and no Network Upgrades are required.

The estimated cost for integrating both 115 kV Cluster generation projects onto the EPE and Southern

New Mexico transmission systems is $10.32 Million. This breaks out to $5.16 Million for DS90S and

$5.16 Million for CO70S.

The good faith estimate of the time frame to Engineer, Procure, and Construct all facilities is 19 months

for each POI switching station.

TRC 115 kV Cluster System Impact Study November 2014

Appendix A

Appendix A 115 kV Cluster System Impact Study

Statement of Work


Appendix B

Appendix B Contingency List

CONTINGENCY LIST Transmission Lines

1. ALA_5 115.0 to ORO_GRAN 115.0 Circuit 1

2. AMRAD 115.0 to LARGO 115.0 Circuit 1

3. AMRAD 345.0 to ARTESIA 345.0 Circuit 1

4. ANTHONY 115.0 to BORDER 115.0 Circuit 1

5. ANTHONY 115.0 to MONTOYA 115.0 Circuit 1

6. ANTHONY 115.0 to NEWMAN 115.0 Circuit 1

7. ANTHONY 115.0 to SALOPEK 115.0 Circuit 1

8. ASCARATE 115.0 to COPPER 115.0 Circuit 1

9. ASCARATE 115.0 to RIVERENA 115.0 Circuit 1

10. AUSTIN_N 115.0 to MARLOW 115.0 Circuit 1

11. AUSTIN_N 115.0 to MARLOW 115.0 Circuit 2

12. BUTERFLD 115.0 to FT._BLIS 115.0 Circuit 1

13. CALIENTE 115.0 to LANE___# 115.0 Circuit 1

14. CALIENTE 115.0 to VISTA__# 115.0 Circuit 1

15. CALIENTE 345.0 to AMRAD 345.0 Circuit 1

16. CHAPARAL 115.0 to ORO_GRAN 115.0 Circuit 1

17. COPPER 115.0 to LANE___# 115.0 Circuit 1

18. COPPER 115.0 to PENDALE 115.0 Circuit 1

19. COYOTE 115.0 to CALIENTE 115.0 Circuit 1

20. COYOTE 115.0 to RGC_DC 115.0 Circuit 1

21. CROMO 115.0 to RIO_GRAN 115.0 Circuit 1

22. DIABLO 115.0 to RIO_GRAN 115.0 Circuit 1

23. DIABLO 115.0 to RIO_GRAN 115.0 Circuit 2

24. DIABLO 115.0 to INSURG 115.0 Circuit 1

25. DYER 115.0 to AUSTIN_N 115.0 Circuit 1

26. DYER 115.0 to SHEARMAN 115.0 Circuit

27. BIGGS 115.0 to GR 115.0 Circuit 1

28. FT._BLIS 115.0 to AUSTIN_N 115.0 Circuit 1

29. GR 115.0 to VISTA__# 115.0 Circuit 1

30. HATCH 115.0 to JORNADA 115.0 Circuit 1

31. HOLLOMAN 115.0 to LARGO 115.0 Circuit 1

32. HORIZON 115.0 to MONTWOOD 115.0 Circuit 1

33. JORNADA 115.0 to ARROYO 115.0 Circuit 1

34. LANE___# 115.0 to WRANGLER 115.0 Circuit 1

35. LAS_CRUC 115.0 to ARROYO 115.0 Circuit 1

36. LAS_CRUC 115.0 to SALOPEK 115.0 Circuit 1

37. LUNA 345.0 to DIABLO 345.0 Circuit 1

38. LUNA 345.0 to HIDALGO 345.0 Circuit 1

39. LUNA 345.0 to AFTON 345.0 Circuit 1

40. MAR 115.0 to LARGO 115.0 Circuit 1

41. MARLOW 115.0 to TROWBRIG 115.0 Circuit 1

42. MESA___# 115.0 to AUSTIN_N 115.0 Circuit 1

43. MESA___# 115.0 to RIO_GRAN 115.0 Circuit 1

44. MILAGRO 115.0 to NEWMAN 115.0 Circuit 1

45. MILAGRO 115.0 to NEWMAN 115.0 Circuit 2

46. MILAGRO 115.0 to LEO 115.0 Circuit 1

47. NEWMAN 115.0 to BUTERFLD 115.0 Circuit 1

48. NEWMAN 115.0 to CHAPARAL 115.0 Circuit 1

49. NEWMAN 115.0 to CROMO 115.0 Circuit 1

50. NEWMAN 115.0 to SHEARMAN 115.0 Circuit 1

51. NEWMAN 345.0 to ARROYO 345.0 Circuit 1

52. NEWMAN 345.0 to AFTON 345.0 Circuit 1

53. NE1 115.0 to NEWMAN 115.0 Circuit 1

54. PELICANO 115.0 to HORIZON 115.0 Circuit 1

55. PELICANO 115.0 to MONTWOOD 115.0 Circuit 1

56. RIPLEY 115.0 to THORN 115.0 Circuit 1

57. MONTWOOD 115.0 to CALIENTE 115.0 Circuit 1

58. MONTWOOD 115.0 to COYOTE 115.0 Circuit 1

59. ORO_GRAN 115.0 to AMRAD 115.0 Circuit 1

60. RIO_GRAN 115.0 to RIPLEY 115.0 Circuit 1

61. SALOPEK 115.0 to ARROYO 115.0 Circuit 1

62. SANTA_T 115.0 to DIABLO 115.0 Circuit 1

63. SANTA_T 115.0 to MONTOYA 115.0 Circuit 1

64. SANTA_T 115.0 to NW2 115.0 Circuit 1

65. SCOTSDALE 115.0 to VISTA__# 115.0 Circuit 1

66. PENDALE 115.0 to LANE___# 115.0 Circuit 1

67. SOL 115.0 to LANE___# 115.0 Circuit 1

68. SOL 115.0 to VISTA__# 115.0 Circuit 1

69. SPARKS 115.0 to HORIZON 115.0 Circuit 1

70. SUNSET_N 115.0 to RIO_GRAN 115.0 Circuit 1

71. TALAVERA 115.0 to ANTHONY 115.0 Circuit 1

72. THORN 115.0 to MONTOYA 115.0 Circuit 1

73. NW2 115.0 to DIABLO 115.0 Circuit 1

74. WHITE_SA 115.0 to ALA_5 115.0 Circuit 1

75. WRANGLER 115.0 to SPARKS 115.0 Circuit 1

76. WRANGLER 115.0 to SPARKS 115.0 Circuit 2

77. AEP 115.0 to AZTECAS 115.0 Circuit 1

78. AEP 115.0 to REA2 115.0 Circuit 1

79. CHAMIZAL 115.0 to COLEGIO 115.0 Circuit 1

80. CHAMIZAL 115.0 to RIVERENA 115.0 Circuit 1

81. CHAVENA 115.0 to AZTECAS 115.0 Circuit 1

82. COLEGIO 115.0 to CHAVENA 115.0 Circuit 1

83. COLEGIO 115.0 to FTS 115.0 Circuit 1

84. FTS 115.0 to TEC 115.0 Circuit 1

85. INSURG 115.0 to CHAMIZAL 115.0 Circuit 1

86. INSURG 115.0 to CHAVENA 115.0 Circuit 1

87. REA2 115.0 to AZTECAS 115.0 Circuit 1

88. REA2 115.0 to INSURG 115.0 Circuit 1

89. CALIENTE 345.0 to PICANTE 345.0 Circuit 1

90. NEWMAN 115.0 to PIPELINE 115.0 Circuit 1

91. LEO 115.0 to DYER 115.0 Circuit 1

92. PICANTE 345.0 to NEWMAN 345.0 Circuit 1


93. PICANTE 115.0 to BIGGS 115.0 Circuit 1

94. PICANTE 115.0 to GR 115.0 Circuit 1

95. ANTHONY 115.0 to NW3 115.0 Circuit 1

96. ARROYO 115.0 to COX 115.0 Circuit 1

97. APOLLOSS 115.0 to APOLLO 115.0 Circuit 1

98. HATCH 115.0 to LEASBURG 115.0 Circuit 1

99. LE1 115.0 to APOLLOSS 115.0 Circuit 1

100. LE1 115.0 to JORNADA 115.0 Circuit 1

101. SUNSET_N 115.0 to DURAZNO 115.0 Circuit 1

102. DURAZNO 115.0 to ASCARATE 115.0 Circuit 1

103. NW3 115.0 to MONTOYA 115.0 Circuit 1

104. COX 115.0 to APOLLOSS 115.0 Circuit 1

105. APOLLO 115.0 to JORNADA 115.0 Circuit 1

106. LEASBURG 115.0 to JORNADA 115.0 Circuit 1

107. NE1 115.0 to CROMO 115.0 Circuit 1

108. ANTHONY 115.0 to COX 115.0 Circuit 1

109. COX 115.0 to TALAVERA 115.0 Circuit 1

110. ASCARATE 115.0 to COPPER 115.0 Circuit 2

111. JORNADA 115.0 to AIRPOR 115.0 Circuit 1

112. AFTON 115.0 to AIRPOR 115.0 Circuit 1

113. SOL 115.0 to VISTA__# 115.0 Circuit 2

114. NEWMAN 115.0 to PICANTE 115.0 Circuit 1

115. PIPELINE 115.0 to BIGGS 115.0 Circuit 1

116. HIDALGO 345.0 to GREENLEE 345.0 Circuit 1

117. LUNA 345.0 to LEF 345.0 Circuit 1

118. DONA_ANA 115.0 to LAS_CRUC 115.0 Circuit 1

119. AMRAD 115.0 to ALAMOGCP 115.0 Circuit 1

120. HOLLOMAN 115.0 to ALAMOGCP 115.0 Circuit 1

121. AIRPOR_T 115.0 to AIRPOR 115.0 Circuit 1

122. CABALLOT 115.0 to UVAS 115.0 Circuit 1

123. UVAS 115.0 to MIMBRES 115.0 Circuit 1

124. ORO_GRAN 115.0 to JARILLA1 115.0 Circuit 1

125. WSTAP 115.0 to WHITE_SA 115.0 Circuit 1

126. ASCARATE 115.0 to TROWBRIG 115.0 Circuit 1

127. EPE1 115.0 to COYOTE 115.0 Circuit 1

128. EPE1 115.0 to MONTWOOD 115.0 Circuit 1

129. CALIENTE 115.0 to EPE1 115.0 Circuit 1

130. CALIENTE 115.0 to EPE1 115.0 Circuit 2

131. CALIENTE 115.0 to VISTA__# 115.0 Circuit 2

132. CALIENTE 115.0 to SE2 115.0 Circuit 1

133. CALIENTE 115.0 to SE2 115.0 Circuit 2

134. CALIENTE 345.0 to PICANTE 345.0 Circuit 2

135. MACHO_SPRNGS 345.0 to LUNA 345.0 Circuit 1

136. MACHO_SPRNGS345.0 to SPRINGR 345.0 Circuit 1

137. LE1 115.0 to ARROYO 115.0 Circuit 1

138. SE2 115.0 to LANE___# 115.0 Circuit 1

139. Line SE2 115.0 to LANE___# 115.0 Circuit 2

140. RIPLEY 115.0 to THORN 115.0 Circuit 2

141. PICANTE 345.0 to AMRAD 345.0 Circuit 1

142. WESTMESA 345.0 to ARR___PS 345.0 Circuit 1

143. ORO GRANDE 115.0 TO CO70S 115.0 Circuit 1

144. CHAPARRAL 115.0 TO CO70S 115.0 Circuit 1

145. NW2 115.0 to ROADRUNRTAP 115.0 Circuit 1

146. ROADRUNRTAP 115.0 to DIABLO 115.0 Circuit 1

147. ROADRUNRTAP 115.0 to ROADRUNER 115.0

Circuit 1

148. ART320W 345.0 to ARTESIA 345.0 Circuit 1

149. Line CALIENTE 345.0 to CORONA 345.0 Circuit 1

150. AMRAD 345.0 to AA100W 345.0 Circuit 1

151. AA100W 345.0 to ARTESIA 345.0 Circuit 1

152. CORONA 345.0 to AMRAD 345.0 Circuit 1

153. CORONA 345.0 to AMRAD 345.0 Circuit 2

154. CORONA 345.0 to PICANTE 345.0 Circuit 1

155. CORONA 345.0 to NEWMAN 345.0 Circuit 1

156. WESTMESA 345.0 to WA300POI 345.0 Circuit 1

157. WA300POI 345.0 to ARR___PS 345.0 Circuit 1

158. WA300POI 345.0 to WA300_C 345.0 Circuit 1

159. WA300_C 345.0 to WA300_C2 345.0 Circuit 1

160. IRONSTREET-PRAGER 46 kV (PI)

161. IRONSTREET-PERSON 46 kV (PH)

162. PERSON-TOME 46 kV (PB)

163. PERSON-TOME 46 kV (BN)

164. PERSON-PY47 46 kV (EL)

165. POWERPLANT-ZIA 46 kV (ZS)

166. POWERPLANT-ZIA 46 kV (ZM)

167. PRAGER-KELEHER 46 kV (PY)

168. SANDIA-IDEAL 46 kV (ID)

169. ALGODONE-PACHMANN 115 kV (AL)

170. ALGODONE-NORTON/ZIA1 115 kV (ANZ)

171. ALGODONE-AW CAP 115 kV

172. AW CAP-WILLARD 115 kV

173. AMBROSIA-BLUEWATER 115 (MB)

174. AMBROSIA-GULF PGT 115 kV (MA)

175. AMBROSIA-YAHTAHEY 115 kV (AY)

176. BA-ZIA 115 kV (RS)

177. BA-REEVES 1 115 kV (AB)

178. BA-REEVES 2 115 kV (RB)

179. BA-STA 115 kV (RL)

180. BA-PACHMANN 115 kV (CB)

181. BELEN-WILLARD 115 kV (WL)

182. BELEN-TOME 115 kV (TJ)

183. BELEN-WEST MESA 3 115 kV (WB)

184. BELEN-SOCORRO 115 kV (SOC)

185. CORRALES-IRVING 115 kV (IC)


186. CORRALES-PACHMANN 115 kV (CY)

187. EMBUDO-SANDIA 2 115 kV (SE)

188. EMBUDO-NORTH(TL)/EB86 (EB) 115 kV

189. EMBUDO-REEVES 1 115 kV (RE)

190. EMBUDO-REEVES 2 115 kV (ER)

191. IRVING-WEST MESA 1 115 kV (WR)

192. IRVING-REEVES 1 115 kV (IR)

193. KIRTLAND-PERSON 115 kV (PS)

194. KIRTLAND-SANDIA 1 115 kV (KS)

195. NORTH-PRAGER 115 kV (PN)

196. NORTH-MISSION 115 kV (MN)

197. NORTH-REEVES 1 115 kV (RN)

198. NORTON-ETA 115 kV (NL)

199. NORTON-ZIA 2 115 kV (NS)

200. NORTON-HERNANDEZ 115 kV (NH)

201. OJO-HERNANDEZ 115 kV (HO)

202. PACHMANN-WEST MESA 3 115 kV (CE)

203. PERSON-SP83/HW43 115 kV (SP)

204. PERSON-WEST MESA 2 115 kV (PM)

205. PERSON-TOME 115 kV (AT)

206. PERSON-WEST MESA 1 115 kV (PW)

207. PRAGER-WEST MESA 2 115 kV (WP)

208. REEVES 2-MISSION 115 kV (NR)

209. REEVES 2-WEST MESA 2 115 kV (NW)

210. SANDIA 1-HW43/EB68 115 kV (EB)

211. SANDIA 2-SP83 115 kV (SP)

212. VALENCIA-ZIA 115 kV (SL)

213. VALENCIA-STORRIE LAKE 115 kV (VS)

214. WEST MESA 115 kV BUS TIE 1-3

215. WEST MESA 1-GULF PGT 115 kV (KM)

216. WEST MESA 115 kV BUS TIE 1-2

217. WEST MESA 3-BLUEWATER 115 kV (BW)

218. YAHTAHEY-PEGS 115 kV (GYTH&WTG)

219. ZIA 115 kV BUS TIE

220. ETA-STA 115 kV (SA)

221. ETA-WTA 115 kV (TE)

222. ETA-TA53 115 kV (LA)

223. STA-WTA 115 kV (SW)

224. TA3-TA53 115 kV (SW)

225. TA3-WTA 115 kV (WT)

226. SPRINGER-TAOS 115 kV

227. SPRINGER-STORRIE LAKE 115 kV

228. TAOS-HERNANDEZ 115 kV

229. GLADSTONE-CLAPHAM 115 kV

230. RIO PUERCO - CORRALES BLUFFS (RR) 115 kV

231. AMBROSIA-WEST MESA 230 kV (WA)

232. AMBROSIA-PEGS 230 kV

233. AMBROSIA-BISTI 230 kV (BI)

234. BA-RIO PUERCO 345 kV

235. WEST MESA-RIO PUERCO 345 kV

236. BA-GAUDALUPE 345 kV (BB)

237. B-A-RIO PUERCO 345 kV

238. SAN JUAN-RIO PUERCO 345 kV

239. BA-NORTON 345 kV (NB)

240. BISTI-PILLAR 230 kV (BP)

241. FOUR CORNERS-WEST MESA 345 kV (FW)

242. GALLEGOS-PILLAR 230 kV (GC)

243. OJO-SAN JUAN 345 kV (OJ)

244. OJO-TAOS 345 kV (OT)

245. PILLAR-FOUR CORNERS 230 kV (AF)

246. SANDIA-WEST MESA 345 kV (WS)

247. SAN JUAN-SHIPROCK 345 kV (SR)

248. SAN JUAN-MCKINLEY 345 kV #1

249. SAN JUAN-MCKINLEY 345 kV #2

250. SAN JUAN-SANJN PS 345 kV (SH)

251. TAIBAN-BLACKWATER 345 kV (TB)

252. WALSENBURG - GLADSTON 230 kV

253. LORDSBURG-MD 69 kV

254. SILVER CITY-TURQUOISE 69 kV

255. SILVER CITY-MD 69 kV

256. ALMAMOGORDO-AMRAD 115 kV

257. ALAMOGORDO-DONA ANA 115 kV

258. ALAMOGORDO-HOLLOMAN 115 kV

259. AMRAD-LARGO/HOLLOMAN 115 kV

260. AMRAD-OROGRANDE 115 kV

261. HIDALGO-LORDSBURG 115 kV

262. HIDALGO-TURQUOISE 115 kV

263. LUNA-MIMBRES 115 kV

264. LUNA-MD 115 kV

265. MD-TURQUOISE 115 kV

266. MIMBRES-PICACHO 115 kV

267. MIMBRES-ELEPHANT BUTTE 115 kV

268. PICACHO-DONA ANA 115 kV

269. PICACHO-ELEPHANT BUTTE 115 kV

270. SANTA TERESA – DS70S 115 kV

271. DS70S-NW2 115 kV

272. LUNA-LEF 345.0 kV

CONTINGENCY LIST Transformers

273. AMRAD 345/115 kV Circuit 1

274. ARROYO 345/115 kV Circuit 1

275. ARROYO 345/115 kV Circuit 2

276. CALIENTE 345/115 kV Circuit 1

277. CALIENTE 345/115 kV Circuit 2

278. DIABLO 345/115 kV Circuit 1



281. NEWMAN 345/115 kV Circuit 1

282. PICANTE 345/115 kV Circuit 1

283. AFTON 345/115 kV Circuit 1

284. HIDALGO 345/115 kV Circuit 1

285. HIDALGO 345/115 kV Circuit 2

286. LUNA 345/115 kV Circuit 1

287. ZIA 115/46 kV TRANSFORMER #1


289. PERSON 115/46 kV TRANSFORMER

290. PRAGER 115/46 kV TRANSFORMER

291. SANDIA 115/46 kV TRANSFORMER #2

292. TOME 115/46 kV TRANSFORMER


294. ZIA 115/46 kV TRANSFORMER #1 & 2

295. SPRINGER-GLADSTONE 115 kV

296. TAOS 345/115 kF TRANSFORMER #3

297. TAOS 345/115 kF TRANSFORMER #4

298. AMBROSIA 230/115 kV TRANSFORMER

299. BA 345/115 TRANSFORMER

300. OJO 345/115 kV TRANSFORMER

301. SANDIA 345/115 kV TRANSFORMER

302. WESTMESA 345/115 kV TRANSFORMER #1




306. NORTON 345/115 kV TRANSFORMER

307. MCKINLEY-YAHTAHEY 345/115 kV

TRANSFORMER

308. SAN JUAN-HOGBACK 230/115 kV

TRANSFORMER

CONTINGENCY LIST Generators

309. AMRAD_A 13.2 Unit ID 1

310. NEWMANG3 13.8 Unit ID 1

311. NEWMN4S1 13.8 Unit ID 1

312. NEWMN5G1 13.8 Unit ID 1






318. RIOGD_G8 17.5 Unit ID 1

319. RIOGD_G9 13.8 Unit ID 1

320. ST_DIST_PV 24.9 Unit ID 1

321. APT_DIST_PV 24.9 Unit ID 1

322. CHAP_DIST_PV 13.8 Unit ID 1

323. HAT_DIST_PV 24.9 Unit ID 1

324. MOCC_G1 13.8 Unit ID 1




328. MO420G ALL UNITS" 329. CO70S OV 330. DS90S PV


Appendix C

Appendix C Dynamic Modeling Data

#New 2014 115 kV Cluster Modelsregc_a 99101 "OT_PV_1 " 0.55 "1 " : #99 mva=74.5700 "lvplsw" 1.000000 "rrpwr" 10.0000 "brkpt" 0.900000 "zerox" 0.400000 "lvpl1" 1.2200 "vtmax" 1.2000 "lvpnt1" 0.800000 "lvpnt0" 0.400000 "qmin" -1.3000 "accel" 0.700000 / "tg" 0.020000 "tfltr" 0.020000 "iqrmax" 100.0000 "iqrmin" -100.0000 "xe" 0.0gencls 99100 "OT_PV_POI " 115.00 "IN" : #9 mva=999.0000 "h" 999.0000 "d" 0.0000 "ra" 0.0000 "lppd" 0.1000 / "rcomp" 0.0000 "xcomp" 0.0000 "accel" 0.0000 reec_b 99101 "OT_PV_1 " 0.55 "1 " : #99 "mvab" 74.5700 "vdip" -99.0000 "vup" 99.0000 "trv" 0.020000 "dbd1" -0.050000 "dbd2" 0.050000 "kqv" 0.0 "iqh1" 1.2500 "iql1" -1.0500 "vref0" 1.000000 / "tp" 0.050000 "qmax" 0.280011 "qmin" -0.280011 "vmax" 1.000000 "vmin" 0.900000 "kqp" 1.000000 "kqi" 0.0 "kvp" 1.000000 "kvi" 0.0 "tiq" 0.020000 / "dpmax" 99.0000 "dpmin" -99.0000 "pmax" 1.000000 "pmin" 0.0 "imax" 1.000000 "tpord" 0.020000 "pfflag" 0.0 "vflag" 0.0 "qflag" 1.000000 "pqflag" 0.0regc_a 99001 "ST_PV_1 " 0.55 "1 " : #99 mva=99.3800 "lvplsw" 1.000000 "rrpwr" 10.0000 "brkpt" 0.900000 "zerox" 0.400000 "lvpl1" 1.2200 "vtmax" 1.2000 "lvpnt1" 0.800000 "lvpnt0" 0.400000 "qmin" -1.3000 "accel" 0.700000 / "tg" 0.020000 "tfltr" 0.020000 "iqrmax" 100.0000 "iqrmin" -100.0000 "xe" 0.0gencls 99900 "ST_PV_POI " 115.00 "IN" : #9 mva=999.0000 "h" 999.0000 "d" 0.0000 "ra" 0.0000 "lppd" 0.1000 / "rcomp" 0.0000 "xcomp" 0.0000 "accel" 0.0000 reec_b 99001 "ST_PV_1 " 0.55 "1 " : #99 "mvab" 99.3800 "vdip" -99.0000 "vup" 99.0000 "trv" 0.020000 "dbd1" -0.050000 "dbd2" 0.050000 "kqv" 0.0 "iqh1" 1.2500 "iql1" -1.0500 "vref0" 1.000000 / "tp" 0.050000 "qmax" 0.395220 "qmin" -0.395220 "vmax" 1.000000 "vmin" 0.900000 "kqp" 1.000000 "kqi" 0.0 "kvp" 1.000000 "kvi" 0.0 "tiq" 0.020000 / "dpmax" 99.0000 "dpmin" -99.0000 "pmax" 1.000000 "pmin" 0.0 "imax" 1.000000 "tpord" 0.020000 "pfflag" 0.0 "vflag" 0.0 "qflag" 1.000000 "pqflag" 0.0


Appendix C

1

115 kV Cluster 2014 System Impact Study TRC November 2014 APPENDIX D

Appendix D

Stability Plots

Stability plots are not included in this report because there are 972 pages of plots in this study. Plots for the study will be provided upon request.

115 kV Cluster 2014 System Impact Study TRC November 2014 APPENDIX D

115 kV Cluster 2014 System Impact Study TRC November 2014 APPENDIX E

Appendix E

Worst Condition Analysis Results

Worst Condition Analysis (WCA) results are not included because there are 563 pages of results in this study. WCA results for the study will be provided upon request.

115 kV Cluster 2014 System Impact Study TRC November 2014 APPENDIX E


Appendix F

Appendix F Project Schedule

ID Task Name Duration Start Finish Predecessors

1 CO70S and DS90S POI Switching Station 528 days Mon 12/1/14 Wed 12/7/16

2 Preliiminary Engineering 1.6 wks Mon 12/1/14 Wed 12/10/14

3 Permitting 26 wks Thu 12/11/14 Wed 6/10/15 2

4 Engineering and Procurement 52 wks Thu 6/11/15 Wed 6/8/16 3

5 Construction 26 wks Thu 6/9/16 Wed 12/7/16 4

6

7 Chaparrall - Oro Grande Relay Work 105 days Thu 4/14/16 Wed 9/7/16

8 Engineering and Procurement 16 wks Thu 4/14/16 Wed 8/3/16 3FS+44 wks

9 Construction 5 wks Thu 8/4/16 Wed 9/7/16 8

Sep Jan May Sep Jan May Sep Jan4th Quarter 3rd Quarter 2nd Quarter 1st Q

Task

Task Progress

Critical Task

Critical Task Progress

Milestone

Summary

Rolled Up Task

Rolled Up Critical Task

Rolled Up Milestone

Rolled Up Progress

Split

External Tasks

Project Summary

Group By Summary

Inactive Task

Inactive Milestone

Inactive Summary

Manual Task

Duration-only

Manual Summary Rollup

Manual Summary

Start-only

Finish-only

Deadline

Page 1

Project: 115 kV Cluster Project ScheduDate: Thu 11/13/14

SYSTEM IMPACT STUDY FINAL REPORT 115 kV CLUSTER ...

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