The ruling in R.02-06-001 directed that the proposed tariffs should be designed to recover the total revenue, including transmission and distribution charges, currently allocated to customers 200 kW and larger and be class revenue neutral, compared to existing rates, based on current class load patterns.3 In addition, the utilities were to include customers currently receiving service under interruptible/non-firm rate schedules on the new tariffs and migrate those customers onto an alternative interruptible program called E-BIP (for Base Interruptible Program) that makes a capacity reservation payment to participating customers rather than offering lower rates like the non-firm rate schedules provide.
Each utility responded to these directives by proposing different structures for their default critical peak pricing tariff. The Office of Ratepayer Advocates (ORA) also made a specific proposal in testimony. Below we provide a brief comparison of the critical features of each utility and ORA's primary proposals.
PG&E Preferred |
SCE |
SDG&E |
ORA Preferred | |
Customer Applicability |
200 kW - 500kW firm customers exclude DA/ag, optional for interruptible tariffs |
>200kW firm customers, exclude direct access (DA) |
>300kW with access to kWickview, includes DA |
All customers over 200 kW, including non-firm. |
Critical Peak Price4 |
$0.25/kWh adder to tariff rate |
$1.00/kWh |
11am-3pm: $0.13906 3pm-6pm: $0.28065 |
Not calculated but based on generation marginal capacity cost. Eliminate current generation summer peak demand charge for firm customers. For non-firm customers, split the current summer on-peak energy charge into CPP and non-CPP charges. |
Non-Critical Peak Credits5 |
$0.42 - 0.066/kWh credit applied to partial and off-peak usage within same day as event call |
14-18% credit, per event called, applied to on- peak energy and demand charges within billing cycle |
$0.08914/kWh peak |
Not calculated |
Hedge Premium |
$0.001/kWh for all summer kWh |
1.93 - 15.12% increase applied to all summer on-peak charges (varies by rate schedule) |
5% premium on commodity portion of current summer rates, $0.10423/kWh on-peak |
Not calculated |
Participation Credit |
$0.001/kWh credit |
None |
None |
None |
Event Duration |
3 hours/event, 3-6 pm |
6 hours/event, noon-6 pm |
7 hours/event, 11am - 6 pm |
|
Triggering Event |
Statewide standard that makes use of "best available day-ahead forecast information" |
ISO Alert |
ISO Alert; SDG&E system and temperature conditions; SDG&E grid emergencies |
Prefer SDG&E's proposed trigger, based on system reserves. |
Customer Notification |
3pm day before |
3pm day before |
3 pm day before |
Not stated |
Event Call Limit |
12 days (36 hours) |
15 days (90 hours) |
12 days (84 hours) |
12 days |
Range of Bill Impacts6 |
-3.88% to + 3.17%, assuming no change in load and 12 calls |
-40.68% to + 16.11% assuming no change in load and 12 calls |
-6.12% to +4.88% assuming no change in load and 12 calls |
Not calculated |
Opt-Out Deadline |
None established |
June 5, 2005 |
May 15, 2005 |
Not stated |
Implementation Costs |
$7,167,500 |
$2,009,700 |
$1,273,000 |
Not stated |
Outreach |
Encourage customer feedback through the regulatory process education and marketing |
Education and outreach; "information and tools" |
Contact/inform; |
Not stated |
As is evident from this table, the proposed rate designs are very different. This means that a customer who has facilities in different utility service territories would need to approach its facility management differently based on who the facility takes service from, complicating the customer's energy management planning process. In addition, each utility took a different approach to whether to exclude certain types of customers from the default tariff. For example, PG&E would exclude customers taking service under agricultural tariffs, but SCE would not. It addition, although the utilities complied with the December Ruling in filing the applications, none supports implementing the proposed rates in Summer 2005.
3 In other words, the new default rate proposals were to be comprehensive, covering both demand and volumetric charges. 4 PG&E's on-peak secondary voltage total energy rate for E-19V is $0.14657, and for A-10 is $0.14036. 5 Credits are presented as ranges because they vary based on rate schedule for PG&E and SCE. For SDG&E, when no event is called, the rates set forth in this row apply. (See generally Exhibits 1:4-6, 5:19, and 9: Attachment C.) 6 Derived from Exhibits 22, 12 and 14.