Discussion Questions for DAWG Meeting 4/1/14

PG&E

Does the geographic area covered by the transmission planning forecast (including munis) correspond to the PG&E TAC area (NP26)?

Please provide more details on the allocation of the CEC forecast to the division level. It’s not clear to us whether the CEC forecast is allocated first to 7 local transmission areas and then to divisions or directly to division.

Please provide a definition of the boundaries for both the 7 local transmission areas and the 20 sub-areas (divisions).

Do you currently use the CEC local area forecasts (1.5 forms) in the allocation of the CEC service territory or TAC area forecast?

SCE

Does the geographic area covered by the transmission planning forecast (including munis) correspond to the SCE TAC area?

Please provide a definition of the boundaries for the study area subdivisions (main system, North of Lugo, etc.)

In the bus bar allocation, does SCE disaggregate the CEC forecast to the subdivision level first?

Do you currently use the CEC local area forecasts (1.5 forms) in the allocation of the CEC service territory or TAC area forecast?

Is the county-level corporate forecast used in disaggregating to busbar?

SDG&E

In allocating to busbar, are SDG&E sub-areas defined and used as a middle step?

Questions Related to Disaggregation to Bus of AAEE Savings

CPUC/CEC propose to obtain historic WECC load buss data and allocation to customer classes each year for the prior year. Initial discussions between PG&E and CPUC/CEC about the data request to obtain actual historic loads by WECC bus and allocation to customer type suggest that a September 1 data request with a November 1 delivery date is ideal from their perspective. Does this timing work for SCE and SDG&E?

At what point will interval data be sufficient accessible to analysts that it can be used to construct the composition of load on a bus by customer type at a given historic point in time, e.g. the ISO system peak.

The IOUs have provided allocations of historic load on a WECC bus using rate classifications appropriate to each IOUs tariffs even though these are a poor match to the energy efficiency program groupings used in potential and AAEE studies. See table below. What flexibility exists to reduce this inconsistency?

AAEE / PG&E / SCE / SDG&E
Residential
Commercial
Ind-manufacturing
Ind-mining
Agriculture
Streetlighting / Residential
Small C&I
Medium C&I
Large C&I
Agriculture
Other / Residential
Small commercial
Large commercial
Small industrial
Large industrial
Ag & Pumping
Other / Residential
Small commercial
Large commercial
Small industrial
Large industrial
Agriculture
Other

For IOU programs, either CPUC/ED or each IOU can be a source of historic EE savings by fine geographic areas and/or circuits and load busses. What is the most efficient method to develop these data to be used in refining how to allocate prospective IOU EE program savings?