Getting Planning Tools Closer To Real-Time and Operation

www.lipower.org

Getting Planning Tools Closer To Real-Time and Operation

CIM User Group MeetingAustin, TX October 23-26, 2007

Loris Arnold (516) 545-3661

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Privileged and ConfidentialSeptember 27, 2006

Who Is LIPA?

State utility located on Long Island New York

Long Island Power Authority owns T&D

National Grid (former KEYSPAN) owns the power plants and manage T&D for LIPA

www.lipower.org

Overview of the LIPA T&D System

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Privileged and ConfidentialSeptember 27, 2006

Company Overview

Customers 1,103,162Population: ~3 M (est. 2005)

Peak Demand: 5,792 MW (Aug. 2006)

Seven Ties: 2 DC, 5 AC

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Privileged and ConfidentialSeptember 27, 2006

Company Overview

FacilitiesSubstations 177Distribution Circuits 848Overhead ~75%, Underground ~25%Distribution Automation >1200 switches

System Voltages Transmission 345kV, 138kV, 69kVSub-Transmission 34.5kV, 23kVPrimary Distribution 13.8kV or 4.3 kVSecondary Distribution 120/208, 120/240, 277/480

GenerationKEYSPAN Generation…………….5461 MWTotal Available Generation……….5656 MWSeven Interties…………………….2062 MW

Standard Area Substation Design2-4 bank, design28, 33, 56 MVA transformers

Southampton Substation

Canal Substation, 2005

www.lipower.org

Getting Planning Closer to Real-Time and Operation

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Privileged and ConfidentialSeptember 27, 2006

Initial Project

Track network changes to recreate historical model Build CIM model from GE Harris EMS Retrieve Measurement Data from PI Historian Run PSS/O to support Operations with real-time load flow analyses Create PSS/E load flow models for Electric Planning Establish access to asset condition data via CIM Integration Bus

PSS™ODMSE & LDFW(for time T1)

PSS/E Equivalent

Case (for time T1)

CIM Model

(at time T1)

PI Historian(at time T1)

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Privileged and ConfidentialSeptember 27, 2006

Initial Architecture

EMS

ICCP

CIM/ODMSPowerModels

IBIBIBIB

PSS/ODMS

PSS/E

CIM

PowerModels

CIM PIAdapter Archive

PI

PowerModels

MeasurementData

MeasurementData

EquipmentModels

CIMAM Virtual Data

Warehouse

AnalysisApplications

PowerModels

MMW

Maximo

TOTS

Others

.

.

.

MeasurementData

Utility Integration Bus

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Privileged and ConfidentialSeptember 27, 2006

Expanded requirements: Real Time System Stability is what System Operations Wanted

Currently the System Operator has a very good handle of thermal constraints, however he has less of an understanding of System Stability during off peak maintenance work

Requirement to Perform System Stability during N-1 and N-2 contingencies Request for easy interpretation of stability analysis

Extended requirements:

Support ESO with Stability runs:• Real time Voltage Stability runs using the PSS/O output (RAW file) • Day ahead Stability runs using the PSS/O output (RAW file)• System Stability assessment and support ESO clearance during major

construction projects Extend the CIM to include Stability Data:

– Include Stability Data which will allow CIM compliant application to run Stability without using external machine data files

Model On Demand:– Enable use the current system configuration as base to maintain future planning

system configurations Use the historical data to evaluate:

• Event reconstruction• Load forecasting• Loss studies and system optimization to reduce real and reactive losses

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Privileged and ConfidentialSeptember 27, 2006

Example of real-time substation modeling, includes distribution transformers to capture losses

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Privileged and ConfidentialSeptember 27, 2006

CONTOURS DEMO

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Privileged and ConfidentialSeptember 27, 2006

System Planning Vision of CIM IB

Integration Bus (UIB)

Real-Time Operation

Optimization

(OPF)

Real-Time Operation

Optimization

(OPF)

Model Updates

(Current, Future, Historical)

Model Updates

(Current, Future, Historical)

Real TimeStability

(QuickStab)

Physical Operating Margins

POM (Real time)

Virtual Data Warehouses

Desktop

CIM

ASU DATA(Distr. Autom.

Real Time)

(CYMEDIST)

PI/EMSPI/EMS EGIS

ProbabilisticDISTRIBUTION

ReliabilityModel

SubstationReliability(SUBREL)

Assets Condition and Reliability Data

Probabilistic Risk Assessment for

Transmission

(PRA)

Probabilistic Risk Assessment for

Transmission

(PRA)

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Privileged and ConfidentialSeptember 27, 2006

One View of Real Time Stability Presentation

BASE CASE Steady State Stability

Representation Used to Asses System Stability

WORST CONTINGENCY Stability Representation

from Selected Contingency List

15% Instability Margin

System Unstable

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Privileged and ConfidentialSeptember 27, 2006

Linear Representation of East End Load Pocket Stability

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Privileged and ConfidentialSeptember 27, 2006

Bar Chart Ranking of components based on their impact on stability

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Privileged and ConfidentialSeptember 27, 2006

Some of Future Applications

Load Flow Optimization for Operators: – Perform Operation Optimization (OPF) in real time– Expected better management of loading/overloads and system losses

Load Forecasting for Operation:– Short-term load forecast

• Hours and minutes in the future• One and two days in the future

– Feeders, Circuits, Transformers Real time Boundaries of Operation:

– Use POM software (Physical and Operational Margins) for real time evaluation and visualization of margins and boundary of operation

Voltage Profile on demand:– On selected distribution circuits – Near-real-time data and system models, on-demand calculation

Asset condition/reliability impact on system modeling and analysis – Real-time updates for system models

Integration of Distribution, Sub transmission, and Transmission Models Probabilistic Assessment studies for T and D

– Transmission System: use EPRI PRA software– Distribution System: use CymeDist with additional Reliability Module and enhancements for

probabilistic analysis Exchange of Load Flows with neighboring utilities (XML File)

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Privileged and ConfidentialSeptember 27, 2006

Questions and Answers

?

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Privileged and ConfidentialSeptember 27, 2006

Naming Conventions and Definitions

CIM – Common Information Model PSS/E = Power System Simulator for Engineering (Version 29+) PSS/O = Power System Simulator for Operations (Version 7+) ECI = EPRI CIM Installer (a base set of ODMS functionality) EMS = Energy Management System PI = XA/21 EMS Real Time Data Repository PNA = Power Network Analysis PSM = Power System Model MMW = Maintenance Management Workstation XA/21 = General Electric Network Solution EMS System. UIB = Utility Integration Bus GDA = General Data Access TSDA = Time-Series Data Access HSDA = High-Speed Data Access GID = Generic Interface Definition GES = Generic Event Sequencer ESO = Electric System Operations LIPA = Long Island Power Authority DPE = Distribution Performance Engineering EP&F = Electric Planning and Forecasting VDW = Virtual Data Warehouse ODBC = Open Data Base Connectivity XML = Extensible Markup Language PRA = Physical Reliability Assessment PRI = Physical Reliability Index POM = Physical and Operational Margins V&R Energy = EPRI Contractor which develop POM EGIS = Electric Geographical Information System CYMEDIST = Distribution Analysis Software ASU = Automatic Sectionalizing Unit SUBREL = Substation Reliability