California Independent. System Operator. Market Overview and Design Construct
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1 California Independent Market Overview and Design Construct Kyle Hoffman
2 The ISO Vision Preferred Provider of Superior Electric Transmission Services Ensure reliable transmission system operation Ensure open, non-discriminatory transmission access to market participants Facilitate and rely on competitive markets for generation dispatch
3 Key ISO Roles Schedule Transmission Access Provide Ancillary Services Market Auction Self-Provision Congestion Management Procure balancing energy in real-time Control Area operator duties
4 California ISO Markets Day Ahead (by Trade Hour): Ancillary Services Congestion Management/Transmission Hour Ahead (each hour): Ancillary Services Congestion Management/Transmission Real Time - Imbalance Energy A/S Energy Bids Supplemental Energy Bids
5 ISO Market Services Scheduling Services Transmission Access Imbalance Energy Services Ancillary Services
6 ISO Market Services Power Scheduling Services Generation Load Inter-SC Energy Trades (Bi-laterals) Interchange (Import or Export)
7 Balanced Energy Schedules Sources = Sinks Imports + Generation = Load + Exports SC-SC trades treated as either imports (receive) or exports (send) for the respective SC s portfolios Schedules = Planned Power Flows However, Real Time Actuals drive Settlements
8 Scheduling Timeline Day Ahead Preferred Balanced Schedules & A/S Self Provided or Bids due to ISO Adjusted Schedules & Suggested A/S Published to Scheduling Coordinators Revised Preferred Balanced Schedules & A/S Self Provided or Bids due to ISO Final Schedules & A/S Published to Scheduling Coordinators
9 Scheduling Timeline Hour Ahead & Real Time HA Preferred Balanced Schedules & A/S Bids due to ISO for HE 17 HA Preferred Balanced Schedules & A/S Bids due to ISO for HE 18 RT Energy Bids due in from SCs & HE 18 RT Market CLOSES Actual Operating Hour 18 Begins
10 ISO Market Services Transmission Access New Firm Use (PTO Transmission) Existing Transmission Rights Firm Transmission Rights
11 Inter-zonal Congestion Management CONG mitigates transmission congestion and establishes a usage charge or toll Uses Adjustment Bids as economic signals to adjust scheduled power flows CONG provides for one iteration in DA for SCs to adjust preferred schedules Power flow adjusted over the entire grid for each SC Portfolio Objective is least cost transmission usage by SC SC portfolios are kept in balance
12 HUMB (Inactive) Network Model Sutter Plant SUTR SF (Inactive) NW2 Cascade Cascade Humboldt Standford LLNL Trac Tesla Cap Jack SMUD NW TID NW1 Malin PA CI R. Mt Ctnw d SF Los Banos (PATH Oakdale NP15 LADWP NW3 Plumas-Sierra Gold Hill Bellota ZP26 Summit Gates LA1 - Sylmar LA2 - McCullough LA3 - Inyo LA4 - Victorville Nob Nob LA7 - Adelanto (Mona, IPPDC, Gonder, M ktplace, Mead500, Westwing, McCllugh) SR2 SR3 Midw ay (PATH 26) Vincent Sylmar SR5 Silver Peak Silverpk SP15 NV3 Inyo Victvl IID IID-SCE II1 IID-SDGE II2 MX Eldorado Mccullgh CFE NP15 MEX SUTR NEV Laughlin 500 Laughlin 69 Laughlin Merchant Merchant Imperial Valley Tijuanna NV4 SMUD PGAE COTP Tesla AZ2 Eldorado 4 Corners Moenkopi Palo Verde N. Gila (PV) N.GilaBK4 Mead Blyth Parker Tracy Los Banos AZ3 LLNL Palo Verde ARZ N. Gila (BK4) Mead Blyth Parker Effective 12/1/2005 Cap Jack Olinda Round Mt Cottonwd SMUD Cottonwdp SMUD Westley Rancho TID Oakdale LC3 Lake Stdfd AZ5 LC1 LC Malin Bellota Gold Hill Stdfd Oakdale WALC
13 ISO Market Services Balancing Energy Services A/S Energy Supplemental Energy Ancillary Services (A/S) AGC Regulation Operating Reserves
14 Real Time Market for Balancing Energy -RTMA Energy Bids submitted from Generators, Curtailable Loads, and Interchange; - Supplemental Energy bids, and - A/S Energy bids (Non-AGC Regulation) RTMA Dispatches RT energy on a 5 minute basis which is used by Settlements, to calculate the 10- Minute Interval Zonal Settlement Price, Instructed energy is settled at the resource specific 10- minute price Uninstructed deviations are settled at the Real Time Market zonal 10-minute average ex-post price.
15 RT Balancing Energy Service SAMPLE LOAD COMPARISON DA SC's LOAD SCHEDS HA SC's LOAD SCHEDS ACTUAL LOAD Market O perations HOUR
16 Real Time Energy Market (RTMA) Regulation AGC Control RTMA STACKS Spinning Non-Spinning Replacement Supplemental Energy* Energy Bids Imbalance Energy Economic Dispatch $/MWh Inc Dec * Supplemental Energy Bids RT Energy Only - No Capacity component Accepted up to 62 minutes before the hour
17 Ancillary Services are reserve generation, load or import capacity, on Standby, available to be dispatched as Energy in response to Real Time system contingencies or to provide Balancing Energy. ANCILLARY SERVICES ENERGY
18 ISO Market Services FREQ. TIE (MW) Regulation ACE ANCILLARY SERVICES SYSTEM GENERATOR Spinning Reserve SYSTEM GENERATOR Non-Spinning Reserve SYSTEM GENERATOR Black Start Q (MVAR) P (MW) GENERATOR Voltage Support V (P.U. ) P (MW) SYSTEM + - Replacement Reserve Operating Reserve Replacement Reserve Energy
19 ISO Scheduling, Metering and Settlement Process SCs Schedule Power Flows and Submit A/S Market Participation Bids - by Trade Hour in Day Ahead (DA) and Hour Ahead (HA) timeframes ISO Conducts DA & HA Ancillary Services and Congestion Market Auctions ISO Runs Real Time (RTMA) Balancing Energy Market REAL TIME / Operating Hour SCs/ISO Read Resource Meters (Actuals) for each Operating/Trade Hour ISO Settles Market & Administrative Charges- Ancillary Services, Imbalance Energy, Congestion, Wheeling, GMC
20 A/S Capacity vs Real Time Energy Settlement Fundamentals Capacity settlements and Imbalance Energy settlements are separate and distinct A/S payments are for Reserved Generation Capacity and are settled for each Market, DA and HA (24/Day). Energy is settled as either Instructed or Uninstructed Deviations in Real Time, from Scheduled Power Flows ISO Real Time Energy market is a real time balancing service distinct from commodity Forward Energy Markets
21 ISO Settlement Fundamentals Market Settlements by Charge Type category are revenue neutral Charges are either Due SC or Due ISO and can be + or - Administrative Charges = 15 Unbundled Grid Management Charges (GMC) Settlements are by Trade Hour & 10 Minute Energy Settlement Interval Settlement = Billable Quantity (BQ) x Unit Price
22 Questions? California Independent
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