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ISO Requirements and impact on OpenADR EI TC 8/19/2009 Agenda Item 6

ISO Requirements and impact on OpenADR EI TC 8/19/2009 Agenda Item 6. Ed Cazalet. ISO Views on Smart Grid: CAISO. They advocate both Deep situational awareness of transmission and distribution grid to support centralized dispatch, and

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ISO Requirements and impact on OpenADR EI TC 8/19/2009 Agenda Item 6

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  1. ISO Requirements and impact on OpenADREI TC 8/19/2009 Agenda Item 6 Ed Cazalet

  2. ISO Views on Smart Grid: CAISO • They advocate both • Deep situational awareness of transmission and distribution grid to support centralized dispatch, and • Decentralized dispatch of storage, EV, PHEV, DER, DR via tariffs (dynamic pricing) • Source: May 11, 2009 CAISO comments to FERC on smart grid policy

  3. ISO/RTO Markets • Day-ahead hourly & real-time 5 min markets. • Participants Submit bids ( orders) with price and amount. • DA and RT auctions determines transactions and marginal prices at 1000’s of points of delivery (locations) – locational marginal pricing (LMP) • Schedules for generation and load determined from transactions • Actual meter readings are used to adjust final billing and settlement for deviations from schedules. • Forward markets for capacity including DR curtailment in some ISO/RTOs.

  4. IRC DR Timing Examples

  5. Metering & Validation (M&V) • DR – basis is usually estimated based on history. • Curtailment is relative to this basis. • Meter reads can verify response. • Dynamic Forward Pricing & Transactions • Positions determined by contracted amounts • Meter reads vs. final position can be settled at ex-post real-time prices w/wo penalty.

  6. DNP3 : Distributed Network Protocol • Used for substation, some generators, large loads, and aggregator communication • www.dnp.orgThe development of DNP3 was a comprehensive effort to achieve open, standards-based Interoperability between substation computers, RTUs, IEDs (Intelligent Electronic Devices) and master stations (except inter-master station communications) for the electric utility industry. • Membership required to see protocol. • Discussions ongoing regarding migration / melding of DNP3 and IEC 61850

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