Western Electricity Coordinating Council PC15 High DG Dan Beckstead January 19, 2017 Western Electricity Coordinating Council
Western Electricity Coordinating Council Modeling Logic Production Cost Model Scope Key Questions Assumptions Increase Renewable Energy WECC Wide Results Generation Mix Path Utilization/Flows Load served by Renewables Dump Energyk Western Electricity Coordinating Council
Western Electricity Coordinating Council Scope Study requesters: CREPC/SPSC/WIRAB, PG&E, Strategen Case built and compared to version 1.7 of the Common Case Dataset Increased DER impacts Western Electricity Coordinating Council
Western Electricity Coordinating Council Objective 1.) How does a High DER future impact the dispatch of the production cost model as compared to the 2026 Common Case Production Cost west-wide energy dispatch, fuel use, and CO2 emissions. 2.) What impacts are there to transmission flows and congestion, including if there are changes to interregional transfers to integrate higher DER, or if there are constraints limiting a change to interregional flows 3.) Does this case result in curtailment (or dump energy)? How much? What generation and locations are being curtailed? Western Electricity Coordinating Council
Western Electricity Coordinating Council Modeling assumptions The resources mix for California are based off of the SB 350 study and the resource mix studied by E3. The Majority of the renewables for California came from wind in New Mexico and Wyoming. Western Electricity Coordinating Council
Annual Generation by Type Reduced the thermal units in exchanged for Wind, Solar, DG, and Geothermal. Western Electricity Coordinating Council
Annual Energy Change by Type Western Electricity Coordinating Council
WECC Annual Generation by Category (MWh) 2026 WECC V1.7 2026 PC15 High DER Case Difference Conventional Hydro 240,765,431 240,763,791 (1,640) Energy Storage 3,056,573 2,823,663 (232,910) Steam - Coal 185,569,748 182,037,773 (3,531,974) Steam - Other 2,003,621 1,963,634 (39,987) Nuclear 39,192,186 38,971,938 (220,248) Combined Cycle 286,149,951 278,770,173 (7,379,778) Combustion Turbine 39,538,412 39,154,893 (383,519) IC 1,166,847 1,085,462 (81,384) Other DG/DR/EE - Incremental 30,439,596 43,417,066 12,977,471 Biomass RPS 21,438,455 20,908,155 (530,300) Geothermal 31,370,036 31,124,639 (245,398) Small Hydro RPS 3,744,125 3,743,477 (648) Solar 42,378,029 41,597,263 (780,766) Wind 72,397,285 72,258,386 (138,899) == Total == 999,210,294 998,620,313 (589,980) Other Results Var. Prod. Cost (M$) 17,838 16,177 (1,661) CO2 Cost (M$) 2,386 2,346 (40) CO2 Amount (MMetrTn) 319 313 (6) Dump Energy (MWh) 385,264 1,356,811 971,546 Pumping (PL+PS) (MWh) 11,993,398 11,692,593 (300,806) Western Electricity Coordinating Council
Western Electricity Coordinating Council Dump Energy Most Dump Energy Name Amount NorthStar Solar 1 116,087 RpsCA-0954 81,256 Silver State South 72,040 RpsCA-0946 70,960 Queenstown 61,520 ImpValleySolar1-2 57,814 RpsCA-0078 55,725 AguaCalienteSolar 50,272 SwanHillsSagCT 47,283 Centinela Solar Energy Facility (Phase I) 31,405 Western Electricity Coordinating Council
Western Electricity Coordinating Council
Changes in Path Utilization 75% 90% 99% P25 PacifiCorp/PG&E 115 kV Interconnection 11.93% 8.48% 6.29% P45 SDG&E-CFE 10.51% 5.82% 4.01% P83 Montana Alberta Tie Line 12.13% 5.50% 0.06% P52 Silver Peak-Control 55 kV 12.90% 5.01% 0.00% P36 TOT 3 15.56% 2.93% 0.86% P66 COI 7.27% 2.17% P26 Northern-Southern California 3.23% 1.37% 0.95% P26, P66, and P15 are not highly utilized Western Electricity Coordinating Council
Change in Path Utilization Western Electricity Coordinating Council
Western Electricity Coordinating Council Path Utilization Western Electricity Coordinating Council
Western Electricity Coordinating Council Path Utilization Western Electricity Coordinating Council
Western Electricity Coordinating Council Results/Findings WECC path flows were largely unaffected California exports were largely unaffected despite a large increase in DG Continued investigation with ABBs input Dump energy is occurring mainly during spring hours when LMPs are zero Western Electricity Coordinating Council
Dan Beckstead dbeckstead@wecc.biz (801) 819-7656 Contact Info Dan Beckstead dbeckstead@wecc.biz (801) 819-7656 Western Electricity Coordinating Council