California Code of Regulations › Title 20 - Public Utilities and Energy › Division 2 - State Energy Resources Conservation and Development Commission › Chapter 3 - Data Collection › Article 5 - Electricity Generation Source Disclosure › Section 1393 - Accounting Methodology

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
				  Requirements Applicable to Fuel Mix and GHG Emissions Accounting
(1) Unbundled RECs, including those from a
				  non-eligible renewable energy resource, shall not be used to calculate or
				  adjust the fuel mix or GHG emissions intensity of an electricity
				  portfolio.
(2) A retail supplier's
				  purchases of the specified system power from an asset-controlling supplier
				  shall use the GHG emissions intensity assigned to the asset-controlling
				  supplier by the CARB for the corresponding data year used for data reporting to
				  CARB pursuant to section
				  95111(b)(3) of
				  the MRR. A retail supplier's purchases of the specified system power of an
				  asset-controlling supplier shall be categorized according to the fuel mix of
				  the asset-controlling supplier pursuant to section
				  1394(c).
(3) Net purchases of each specified gross
				  purchase shall be calculated by deducting any specified wholesale sales from
				  each specified gross purchase, as expressed in Equation 1:
Equation
1:
NPi = GPi -
					 WSi
Where:
NPi = Net purchase i, measured in
					 MWh
GPi = Gross purchase i, measured in
					 MWh
WSi = Wholesale sales of gross
					 purchase i, measured in MWh
(4) Net electricity from unspecified sources
				  of power, including electricity purchased through the Electricity Imbalance
				  Market, shall be calculated as the difference between the retail sales
				  associated with an electricity portfolio in the prior year and the total
				  procurement of specified net purchases associated with an electricity portfolio
				  in the prior year, as expressed in Equation 2. If total procurement of
				  specified net purchases exceeds the retail sales of an electricity portfolio,
				  the net unspecified power attributable to the electricity portfolio shall be
				  zero.
Equation
2:
U = RS -
					 TNP
Where:
U = Net unspecified power attributable to the electricity
					 portfolio, expressed in MWh
RS = Retail sales attributable to the electricity
					 portfolio, expressed in MWh
TNP = Total specified net purchases attributable to the
					 electricity portfolio, expressed in MWh
(5) For resources that investor-owned
				  utilities have been directed to procure pursuant to Public Utilities Code
				  section
				  365.1(c)(2)(A),
				  the investor-owned utility shall report the portion of procurement attributable
				  to the investor-owned utility as determined by the California Public Utilities
				  Commission pursuant to Public Utilities Code section
				  365.1(c)(2)(B).
(6) If the total procurement of specified net
				  purchases of an electricity portfolio exceeds retail sales, each net purchase
				  of electricity from a generator using natural gas shall be proportionally
				  reduced so that the sum of all adjusted net purchases equals the retail sales
				  of an electricity portfolio, as expressed in Equation 3. If an electricity
				  portfolio has insufficient natural gas electricity sources to adjust to
				  reconcile the excess specified net procurements with retail sales, each
				  purchase from coal and other fossil fuel electricity sources shall then be
				  proportionally reduced in accordance with Equation 3. If an electricity
				  portfolio has insufficient natural gas or coal and other fossil fuel
				  electricity sources to adjust to reconcile the excess specified net
				  procurements with retail sales, all other specified purchases shall then be
				  proportionally reduced in accordance with Equation 3.
Equation 3: ANPi =
					 NPi - (NP - RS) x (NPi
					 /NPNR)
Where:
ANPi = Adjusted net purchase i,
					 measured in MWh
NPi = Net purchase i, measured in
					 MWh
NP = Sum of all net purchases, measured in MWh
RS = Total retail sales of an electricity portfolio,
					 measured in MWh
NPNR = Any net purchase of a fuel
					 type that is not an eligible renewable, large hydroelectric, or nuclear
					 resource, measured in MWh
(7) Procurements from nuclear or large
				  hydroelectric generating units cannot be classified as specified purchases if
				  the associated environmental attributes have been claimed by, or traded to, a
				  separate party.