1 NERC Consulting Services
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NERCConsultingServices
North American Electric Reliability CorporationThe electric reliability organization (ERO) for North America Its mission is to assure the reliability of the bulk power system
in North AmericaOversight by the Federal Energy Regulatory Commission (FERC)Prior to August 2003 blackout, was only a standards bodyGranted enforcement authority by the federal government as a
result of the 2003 blackout
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What is NERC?
Keep transmission and generation on line when is supposed to Make sure it trips off line when is supposed to
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What is NERC?
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NERC Standards that we can assist with:NERC Standard Description Done by CE?
PRC-001-1.1(ii) System Protection Coordination YesPRC-002 Disturbance Monitoring
PRC-002-NPCC-01 Disturbance Monitoring YesPRC-005-1.1b Transmission and Generation Protection System Maintenance and Testing YesPRC-005-2(i) Protection System Maintenance YesPRC-005-6 Protection System, Automatic Reclosing, and Sudden Pressure Relaying YesPRC-006-2 Automatic Under frequency Load Shedding Yes
PRC-006-NPCC-1 Automatic Under frequency Load Shedding Yes
PRC-008-0Implementation and Documentation of Underfrequency Load Shedding EquipmentMaintenance Program
Yes
PRC-018-1 Disturbance Monitoring Equipment Installation and Data Reporting Yes
PRC-019-2Coordination of Generating Unit or Plant Capabilities, Voltage Regulating Controls, andProtection
Yes
PRC-023-3 Transmission Relay Loadability YesPRC-024-2 Generator Frequency and Voltage Protective Relay Settings YesPRC-025-1 Generator Relay Loadability YesPRC-026-1 Relay Performance During Stable Power SwingsPRC-027-1 Coordination of Protection Systems for Performance During Faults
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NERC Standards that we can assist with:NERC Standard Description Done by CE?VAR-001-4.1 Voltage and Reactive ControlVAR-002-4 Generator Operation for Maintaining Network Voltage Schedules
MOD-025-2Verification and Data Reporting of Generator Real and Reactive Power Capability and
Synchronous Condenser Reactive Power Capability
MOD-026-1Verification of Models and Data for Generator Excitation Control System or PlantVolt/Var Control Functions
MOD-027-1Verification of Models and Data for Turbine/Governor and Load Control or ActivePower/Frequency Control Functions
MOD-032-1 Data for Power System Modeling and Analysis
Description: Communicate Failures, changes in Protection and Control Schemes, orchanges in Operating Conditions to Affected Entities
Applies to: All entities in the BES
Required Info: Description of Failed EquipmentDescription of Modified EquipmentDescription of New Operating ConditionsRevised Protective Device SettingsRevised Fault Analysis (if applicable)
Enforcement Date: 5/29/2015
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PRC-001-1: System Protection Coordination
Description: Installation of Sequence of Events, Digital Fault Recorders, and DynamicDisturbance Recorders to provide adequate data on system events tofacilitate the analysis of BES Disturbances
Applies to: GO’s with units >50MVA and Plants >300 MVA (Sequence of Events) andPlants>200MVA connected to BES via a GSU (Digital Fault Recorder)
Required Info: System One-Line DiagramList of All Protective Relays in path from Generator to BES InterconnectionList of All Circuit Breakers in path from Generator to BES InterconnectionPlant Layout Drawing showing locations of Relays and Breakers
Enforcement Date: 10/20/2013
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PRC-002-NPCC-01: Disturbance Monitoring and Reporting RequirementsPRC-018-1: Disturbance Monitoring Equipment Installation and Data Reporting
Description: Installation of Sequence of Events, Digital Fault Recorders, and Dynamic DisturbanceRecorders to provide adequate data on system events to facilitate the analysis ofBES Disturbances
Applies to: Generator Operators connected to BES where the TO has notified them that theyneed to provide Sequence of Events, Digital Fault Recorder, or a Dynamic Disturbance
Required Info: System One-Line DiagramList of All Protective Relays (type, mfr) in path from Generator to BES InterconnectionList of All Circuit Breakers in path from Generator to BES InterconnectionPlant Layout Drawing showing locations of Relays and Breakers
Enforcement Date: 7/1/2013
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PRC-002-2: Disturbance Monitoring and Reporting RequirementsPRC-018-1: Disturbance Monitoring Equipment Installation and Data Reporting
Description: To ensure all transmission and generation Protection Systems affectingthe reliability of the Bulk Electric System (BES) are maintained and testedby having a documented Protection System maintenance and testingprogram (PSMTP) and documented and dated test results
Applies to: All entities in the BES
Required Info: System Relay and Metering One-Line DiagramsList of All Protective Relays (type, mfr) in path to BESAC 3 line and DC schematic diagramsProtective Relay Settings/Settings Files
Enforcement Date: 11/25/2013
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PRC-005-1.1b: Transmission and Generation ProtectionSystem Maintenance and Testing
Description: To ensure all transmission and generation Protection Systems affecting the reliability of the BulkElectric System (BES) are maintained and tested by having a documented ProtectionSystem maintenance program (PSMP) and documented and dated test results
Applies to: All entities in the BES
Required Info: System Relay and Metering One-Line DiagramsList of All Protective Relays (type, mfr) in path to BESRelay Monitoring SystemsBattery and Charger SystemsAC 3 line and DC schematic diagramsOriginal Protective Relay Settings and Current Settings
Enforcement Date: 5/29/15
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PRC-005-2(i): Protection System Maintenance
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PRC-005-6: Protection System, Automatic Reclosing, andSudden Pressure Relaying Maintenance
Description: To ensure all transmission and generation Protection Systems affecting the reliability of the BulkElectric System (BES) are maintained and tested by having a documented ProtectionSystem maintenance program (PSMP) and documented and dated test results
Applies to: All entities in the BES
Required Info: System Relay and Metering One-Line DiagramsList of All Protective Relays (type, mfr) in path to BES including Transformer Sudden Pressure RelaysRelay Monitoring SystemsBattery and Charger SystemsAC 3 line and DC schematic diagramsOriginal Protective Relay Settings and Current Settings
Enforcement Date: 1/1/16
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PRC-005-2 Key RequirementsPSMP to define maintenance intervals as time based or performance based
Intervals for Time based Maintenance defined by type of relay (EM or Digital) and relay monitoringRanges from 6 to 12 years
Verify the that relays communications are functioning every 4 months if not monitored
Unmonitored Station BatteriesVerify dc voltage and electrolytes every 4 monthsVerify charger, continuity, connection resistance every 18 monthsPerform capacity test every 3-6 years depending on type of battery
CT/PT Verification Tests – verify that current & voltage inputs to the relays are providing expected quantities every 6years for unmonitored relays and every 12 years if self diagnostics and alarming is monitored
Trip Tests – verify operation all breaker trips coils and lockout relays every 6 years, aux relays every 12 yrs
Alarm Monitoring – verify alarms are sent to a monitoring location where corrective action can be initiated within 24hours
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PRC-006-2: Automatic Underfrequency Load Shedding
Description: To establish design and documentation requirements for automatic underfrequencyload shedding (UFLS) programs to arrest declining frequency, assist recovery of frequencyfollowing underfrequency events and provide last resort system preservation measures.
Applies to: All entities in the BES (Generators > 20 MVA)
Required Info: Regional Planning Coordinator Requirements for UFLS schemeList of All Protective Relays which will respond to system frequency excursions and initiateUFLS schemeUnderfrequency limit curves for generating units and V/Hz curves for power transformersAC 3 line and DC schematic diagramsOriginal Protective Relay Settings and Current Settings
Enforcement Date: 10/1/2015
Description: Provide a regional reliability standard for automatic underfrequency load shedding(UFLS) programs to preserve the security and integrity of the bulk power systemduring declining system frequency events
Applies to: All entities in the BES
Required Info: Regional Planning Coordinator Requirements for UFLS schemeList of All Protective Relays which will respond to system frequency excursions andinitiate UFLS schemeUnderfrequency limit curves for generating unitsAC 3 line and DC schematic diagramsOriginal Protective Relay Settings and Current Settings
Enforcement Date: 1/1/16
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PRC-006-NPCC-1: Automatic Underfrequency Load Shedding
Description: This study reviews the facility’s generator excitation system(s) limiters andprotection settings for both coordination and proper protection.
Applies to: Generating units > 20MVA, synchronous condenser > 20MVA, plant with totalgeneration > 75MVA
Required Info: Generator specification sheet(s)Step-up transformer nameplate/specification sheet(s)System Impedance DataExciter system limiters and protection settingsLoss of field and Over excitation protections (if applicable)
Enforcement Date: 5/29/2015
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PRC-019-02: Coordination of Generating Unit or PlantCapabilities, Voltage Regulating Controls, and Protection
Description: This study reviews the facility’s line relays looking out to transmission to ensurethat loadability is not limited while still adequately protecting the line.
Applies to: TO’s, GO’s, and distribution providers with load-responsive phase protection
Required Info: System One-Line DiagramLine relay setting(s)Generator step-up transformer overcurrent protection relay setting(s)Owned transmission line dataReported MW capability to local ISO
Enforcement Date: 10/20/2013
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PRC-023-2: Transmission Relay Loadability
Description: This study reviews the facility’s over/under frequency and voltage set points toavoid nuisance tripping during system (grid) events.
Applies to: GO’s having been notified of required compliance
Required Info: Plant under/over voltage relay settingsPlant under/over frequency relay settings
Enforcement Date: 3/20/2014
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PRC-024-1: Generator Frequency and Voltage ProtectionRelay Settings
Description: This study reviews the facility’s generator protection settings to preventnuisance tripping during system (grid) events.
Applies to: GO’s having been notified of required compliance
Required Info: System One-Line DiagramPlant generation and step-up transformer protection relay settingsStep-up transformer nameplateReported MW capability to local ISO
Enforcement Date: 7/17/2014
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PRC-025-1: Generator Relay Loadability
Description: Evaluating load-shed systems to ensure they do not cause nuisancetrips during stable power swings
Applies to: GO’s having been notified of required compliance
Required Info: System One-Line DiagramLoad Shedding Scheme Drawing PackageGenerator and Step-Up Transformer Specification Sheet(s)
Enforcement Date: TBD
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PRC-026-1: Relay Performance During Stable Power Swings
Description: Ensure protective devices are properly coordinated to ensure thatfaults are isolated with minimal system load interruption
Applies to: GO’s, TO’s, and Distribution Providers with protection systemsinstalled for detecting and isolating faults on the bulk energy system
Required Info: System One-Line DiagramAll protective relay settings
Enforcement Date: 8/2015
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PRC-027-1: Coordination of Protection System PerformanceDuring Faults
Description: To ensure that voltage levels, reactive flows, and reactive resourcesare monitored, controlled, and maintained within limits in Real-time toprotect equipment and the reliable operation of the Interconnection
Applies to: GO’s and TO’s having been notified of required compliance
Required Info: Voltage/reactive power monitoring and control system diagrams
Enforcement Date: 8/1/2014
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VAR-001-4: Voltage and Reactive Control
Description: To ensure generators provide reactive support and voltage control,within generating Facility capabilities, in order to protectequipment and maintain reliable operation of the Interconnection
Applies to: GO’s having been notified of required compliance
Required Info: System One-Line DiagramGenerator voltage control system set point(s) and specification(s)
Enforcement Date: v.03 - 8/1/2014; v.04 - TBD
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VAR-002-4: Generator Operation for Maintaining NetworkVoltage Schedules
Description: Verifies generator capability data, specifically real and reactive power capability.This is a machine test and does not require protective device coordination in orderto successfully complete the test. Protective devices can be adjusted to allow for assuccessful test.
Applies to: Generator Operators connected to BES with individual generating units greaterthan 20 MVA or an aggregate generating capacity greater than 75 MVA
Required Info: Generator “D” CurveProtective Device Coordination DataData Gathering PointsPlant One Line Diagram
Enforcement Date: 2/1/2016
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MOD-025-2: Verification and Data Reporting of GeneratorReal and Reactive Power Capability
Description: To verify that the generator excitation control system or plant volt/var controlfunction model (including the power system stabilizer model and the impedancecompensator model) and the model parameters used in dynamic simulationsaccurately represent the generator excitation control system or plant volt/var controlfunction behavior
Applies to: Generator Operators connected to BES with individual generating units greater than100 MVA (EIR)
Required Info: Detailed Excitation Controller DocumentationDetailed Volt/VAR Control System DocumentationDCS Monitoring Points List or Plant of Relay Protection DiagramPlant Three-Line Diagram
Enforcement Date: 7/1/2014
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MOD-026-1: Verification of Models and Data for GeneratorExcitation Control System or Plant Volt/VAR Control Functions
Description: To verify that the turbine/governor and load control or active power/frequencycontrol model and the model parameters, used in dynamic simulations that assessBulk Electric System (BES) reliability, accurately represent generator unit real powerresponse to system frequency variations.
Applies to: Generator Operators connected to BES with individual generating units greaterthan 100 MVA (EIR)
Required Info: Detailed Automatic Voltage Regulator or Governor DocumentationLoad Control Programming and DocumentationSystem/Machine Limiter Setpoints and DocumentationPlant Relay Protection One-Line Diagram
Enforcement Date: 7/1/2014
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MOD-027-1: Verification of Models and Data for Turbine/Governor and LoadControl or Active Power/Frequency Control Functions
Description: To establish consistent modeling data requirements and reportingprocedures for development of planning horizon cases necessary tosupport analysis of the reliability of the interconnected transmission system.
Applies to: All entities in the BES
Required Info: All Machine DataAll Plant Impedance DataAll Line Impedance DataAll Transformer DataSystem Component Data
Enforcement Date: 7/1/2015
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MOD-032-1: Data for Power System Modeling and Analysis
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