Summary of Second Draft of the NERC Standard PRC Disturbance Monitoring and Reporting JSIS Meeting August 10, 2010 Salt Lake City, UT

© Copyright 2009, Southern California Edison 2 Purpose: To ensure that Facility owners collect the data needed to facilitate analyses of Disturbances on the Bulk Electric System (BES) To establish requirements for recording and reporting sequence of events (SOE) data, fault recording (FR) data, and dynamic disturbance recording (DDR) data to facilitate analyses of disturbances. This standard will replace PRC and PRC standards.

© Copyright 2009, Southern California Edison 3 Planning Coordinators Transmission Owners with BES substation buses. Generator Owners with equipment connected to BES substation buses and either of the following: 1.Generating units having single units of 20 MVA or higher. 2.Generating plants with an aggregate total capacity of 75 MVA or higher. Applicability

© Copyright 2009, Southern California Edison 4 Requirements Each Planning Coordinator shall establish a list of SOE and FR monitored locations by applying the following criteria to their Planning Coordinator area every five years: 25% of the bus locations with the highest calculated short circuit MVA levels for bus locations within their fault study greater or equal to 100 kV and have three-phase short circuit level of 1500 MVA or higher calculated under normal conditions.

© Copyright 2009, Southern California Edison 5 Each Transmission Owner shall record the SOE data for changes in circuit breaker position (open/close) for each of the circuit breakers it owns, at 200 kV and higher voltages in facilities designated to have SOE. Each Generator Owner shall record the SOE data for changes in circuit breaker position (open/close) for each of the circuit breakers it owns functioning as the primary generator output circuit breaker on the high or low side of a GSU for the individual generators of 20 MVA or higher or for an aggregate rating of 75 MVA or higher, in facilities designated to have SOE. Each Generator Owner shall record the SOE data for changes in circuit breaker position (open/close) for each of the circuit breakers it owns at 200 kV and higher voltages in facilities designated to have SOE. Requirements (Contd)

© Copyright 2009, Southern California Edison 6 Requirements (Contd) Each Transmission Owner shall record FR data [each bus, transmission line, and transformer] at locations it owns which are identified to have FR. Each Generator Owner shall record FR data for the individual generators with a rating of 100 MVA or higher or for an aggregate rating of 300 MVA or higher, with a common point of interconnection connected to facilities designated to have FR.

© Copyright 2009, Southern California Edison 7 Requirements (Contd) Each Transmission Owner and Generator Owner shall have FR that meets the following: –A minimum recording rate of 16 samples per cycle. –A pre trigger record length of at least 2 cycles and a post trigger record length of at least 50 cycles for the same trigger point; or at least two cycles of pre trigger data, the first 3 cycles of the fault, and the final cycle of the fault.

© Copyright 2009, Southern California Edison 8 Requirements (Contd) Each Planning Coordinator shall establish a list of DDR monitored locations by applying the following criteria to their Planning Coordinator area every five years: –10% of the bus locations with the highest calculated short circuit MVA levels for bus locations within their fault study greater or equal to 100 kV and have three- phase short circuit level of 1500 MVA or higher calculated under normal conditions. –Generators with an individual rating of 500 MVA or higher or for an aggregate rating of 1500 MVA and higher.

© Copyright 2009, Southern California Edison 9 Requirements (Contd) Each Planning Coordinator shall ensure that the list of DDR monitored locations will monitor the following: –Planned islands formed as a result of generation-load imbalances of 5000 MW and higher. –Any SPS actuation that result in loss of load of 500 MW and higher. –Elements associated with Interconnection Reliability Operating Limits (IROL). –Both ends of a HVDC terminal. –Dynamically controlled devices such as synch condensers, static VAR compensators and all FACTS devices greater than or equal to 100 MVA and voltages above 200 kV. –Each end of transmission lines 300 kV and above between Planning Coordinator areas.

© Copyright 2009, Southern California Edison 10 Requirements (Contd) Each Transmission Owner and Generator Owner, for those DDR devices installed to meet Planning Coordinator requirements, shall ensure its DDR data conforms to the following specifications: –Input sampling rate of at least 960 samples per second. –Store calculated electrical quantities at a rate of at least 30 times per second; or store sampled input quantities for calculations by other devices. Each Transmission Owner and Generator Owner that implements DDR functionality shall provide continuous recording and storage of DDR data.

© Copyright 2009, Southern California Edison 11 Requirements (Contd) Each Transmission Owner and Generator Owner that has DDR functionality and does not have continuous recording capability because the devices were installed prior to the effective date of the continuous recording requirement, shall set data record lengths at a minimum of 3 minutes. Each Transmission Owner and Generator Owner shall have all recorded SOE, FR, and DDR data available (locally or remotely) for 10 calendar days after a disturbance.

© Copyright 2009, Southern California Edison 12 Requirements (Contd) All SOE, FR, and DDR data shall be provided to the Regional Entity, Reliability Coordinator or NERC within 30 calendar days of a request. ALL FR and DDR data shall be in a format such that any software system capable of viewing and analyzing COMTRADE files may be used to process and evaluate the data. Each Transmission Owner and Generator Owner shall each retain all data provided to the Regional Entity, Reliability Coordinator or NERC for at least 3 years following the event.

© Copyright 2009, Southern California Edison 13 Thank You!