1. Tyler Butikofer, WECC Tom Carr, WIEB
ADS V1.0 RPS Check
Tyler Butikofer, WECC
Tom Carr, WIEB
Western Electricity Coordinating Council

2. Brief Review of Process
Collected all generation that complies with RPS goals
Allocated the generation to state/providence
Calculated RPS requirements for each state/providence
Calculated if RPS requirements are met for each state/providence
Not all RECs are accounted for. With RECs, the RPS for each state could be met.
Western Electricity Coordinating Council

3. Renewable Generator Allocation Methodology
BTM-PV is counted toward the RPS goal for all states except California
If the unit was also in the 2026 CC, the same allocation was used for the 2028 ADS PCM
Units not coming from 2026 CC
All units located in CA were allocated to CA units located in AB were allocated to AB
Other units were researched and allocated according to utility websites, power purchase agreements, etc.
158 left after and those units were allocated to the states which they were located in.
Western Electricity Coordinating Council

4. RPS Policies by State/Province

5. California Incremental RPS Goal*
At the end of 2027, the incremental goal is 45%
Extrapolating, we assumed 46.67% for 2028
The 2028HS1a PF assumed 33% RPS for California
Western Electricity Coordinating Council

6. Example of the Allocation Process
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7. Western Electricity Coordinating Council
Energy Requirement
The sales forecast assumes a loss of 6% transmission loss from the load forecast.
California is an exception. The CEC sales forecast was used.
-Change to Renewable Energy Requirment/ sales.
Western Electricity Coordinating Council

8. RPS Summary by Development Status
The Unallocated portion could be used to cover any shortfalls for any of the short states.
If the RPS Gap is in parenthesis, (XX,XXX), the state/providence is exceeding their RPS by the given amount.
If the RPS Gap is not in parenthesis, XX,XXX, the state/providence is not meeting their RPS by the given amount.
California is meeting it’s RPS goal of 33% that was mandated at the time the 2028 HS case was built. They are not short.

9. Load Served by State and Type (GWh)
Delete Load by state
Change “RPS Percent” to “Allocated RE Penetration level”
Western Electricity Coordinating Council

10. Load Served by State and Type
Change to energy, show goal as in previous graph.

11. tbutikofer@wecc.biz 801-819-7604
Questions?
Western Electricity Coordinating Council

12. Appendix A Calculating RPS Targets
Western Electricity Coordinating Council

13. RPS Check for RAC/WECC Studies
Thomas Carr
Western Interstate Energy Board
January 31, 2018
Western Electricity Coordinating Council

14. How to calculate RPS energy targets for states/provinces in the Western Interconnection
General RPS framework
Identify key RPS provisions for states/provinces
Derive state/provincial loads and sales from BA forecasts
Calculate RPS energy targets (GWh) for each state/province

15. General RPS Framework General rule across jurisdictions:
Base (GWh) x Rate (%) = RPS RE (GWh)
RPS RE = Target level of renewable energy
Base = Sales of electricity by utilities covered by the RPS policy (e.g. IOUs, coops, munis, etc)
Rate = Percentage of electricity sales that must be from renewable generation (e.g., wind, solar, geothermal, biomass)
Western Electricity Coordinating Council

16. 2c. Derive State/Provincial loads and sales from BA forecasts
WECC collects load forecasts from Balancing Areas (BA)
Allocate 40 BA load forecasts into 12 states, 2 provinces, MX
9 BAs cover multiple states

17. State/Province Loads and Sales
- Allocate BA load to each state/province
- Convert loads to sales assuming 6% T&D loses
- Sum across each state/province
- California updated by CEC forecast CED
Western Electricity Coordinating Council

18. State/Province Loads and Sales cont.

19. 9 BAs with footprint over multiple states
Western Electricity Coordinating Council

20. 2d. Calculate RPS Targets
Apply policy rules for each jurisdiction
Base (GWh) x Rate (%) = RPS RE (GWh)

21. Summary Calculations: AZ-CA
Western Electricity Coordinating Council

22. Summary Calculations AZ-CA(CEC)
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23. Summary Calculations: CO-MT-NV
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24. Summary Calculations: NM, OR, TX
Western Electricity Coordinating Council

25. Summary Calculations: UT-WA-AB
Western Electricity Coordinating Council

26. Appendix B Gathering RPS Units and Allocating to States/Providences
Western Electricity Coordinating Council

27. Western Electricity Coordinating Council
Gathering RPS Units
Select all renewable sub-types that apply
Biomass
DG-BTM
Geothermal
Hydro RPS (California)
Solar PV
Solar Thermal
Wind Turbine
Western Electricity Coordinating Council

28. Determining State/Prov Allocations
If located in Alberta or California, allocated to Alberta or California, respectively
If located in other states, looked for Power Purchase Agreements (PPAs) or other data from energy websites or utility websites (reference is sited in workbook)
If we couldn’t locate PPAs, the resource was allocated to the state for which it was locate for states with a RPS
Western Electricity Coordinating Council