[California Energy Commission Letterhead]


Implementation of Renewables            )     Docket No. 03-RPS-1078
Portfolio Standard Legislation (Public  )     RPS Proceeding
Utilities Code Sections 381, 383.5,     )	
399.11 through 399.15, and 445; [SB     )	
1038], [SB 1078])                       )

Implementation of Renewables            )     Docket No. 02-REN-1038
Investment Plan Legislation (Public     )     Renewable Energy Program:
Utilities Code sections 381, 383.5, and )     Notice of Renewables Committee 
445 [SB 1038])                          )     Workshop

Notice of Renewables Committee Workshop

The Renewables Committee of the California Energy Commission will conduct a workshop to solicit input on the costs of integrating renewables into California's electricity system. Commissioner John L. Geesman is the Presiding Member and Commissioner James D. Boyd is the Associate Member.

Beginning at 1 p.m.
1516 Ninth Street
First Floor, Hearing Room A
Sacramento, California

(Wheelchair Accessible)

Audio from this meeting will be broadcast over the Internet.
For details, please go to:

Purpose of the Workshop

The Energy Commission staff invites interested parties to attend a workshop on Phase I: Findings and Results of Costs of Integrating Renewables.

[PDF Icon] Download California Renewables Portfolio Standards Integration Cost Analysis - Phase 1: One Year Analysis of Existing Resources, Consultant Report. Publication # 500-03-108C. On line February 6, 2004. (Acrobat PDF file, 136 pages, 5.0 megabytes - Note file size!)

The workshop will be presented by the Renewables Portfolio Standards (RPS) Integration Methods Group, led by the California Wind Energy Collaborative (CWEC) and includes staff and researchers from the California Independent System Operator (Cal-ISO), Oak Ridge National Laboratory, and National Renewable Energy Laboratory.

As the second of a series of RPS integration workshops sponsored by the Energy Commission, the workshop will discuss results and findings generated from the evaluation methodologies presented in April and September 2003. Any applicable comments will be considered for inclusion in the adopted Phase I report expected to be used for initial RPS procurement.


With the adoption of the California Renewable Portfolio Standards under Senate Bill 1078, the Energy Commission is supporting a multi-phase study to define and quantify integration costs. During the first phase, a methodology that is fair, transparent and independent was developed to assess integration costs for existing renewable generators. The methodology developed initial estimates of integration costs that are intended for use in the upcoming RPS procurement process. While additional phases will refine the methodology, the initial estimates are considered valid for the initial procurement.

Written Comments

The Energy Commission encourages members of the public to submit written comments. Attachment A provides an agenda for the workshop and questions for comment.

The Energy Commission encourages members of the public to submit written comments to:

California Energy Commission
Re: Docket No. 03-RPS-1078
and Docket No. 02-REN-1038
Docket Unit, MS-4
1516 Ninth Street
Sacramento, CA 95814-5504

All written materials filed with the Docket Unit will become part of the public record in this proceeding. Written comments will be accepted until close of business Friday, February 27, 2004.

Public Participation

The Energy Commission's Public Adviser, Margret J. Kim, provides the public assistance in participating in Energy Commission activities. If you would like information on how to participate in this workshop, please contact the Public Adviser's Office by phone at (916) 654-4489 or toll free at (800) 822-6228, by FAX at (916) 654-4493, or by e-mail at [pao@energy.state.ca.us]. If you have a disability and require assistance to participate in this workshop, please contact Lou Quiroz at (916) 654-5146 at least five days in advance.

Members of the public who have technical questions regarding this notice may contact George Simons, Manager of PIER Renewables Research and Development by phone at (916) 654-4659 or by e-mail at [gsimons@energy.state.ca.us]. Please include "Costs of Integrating Renewables" into the subject line. News media inquiries should be directed to Claudia Chandler, Assistant Executive Director, at (916) 654-4989 or by e-mail at [mediaoffice@energy.state.ca.us].

JOHN L. GEESMAN JAMES D. BOYD Commissioner and Presiding Member Commissioner and Associate Member Renewables Committee Renewables Committee

Attachment A

RPS Integration Study:
Methodology Findings & Analysis

Workshop Agenda

1:00 - 1:15 Introduction/Overview/Goals
1:15 - 1:45 Data Description
1:45 - 2:30 Capacity Credit Analysis and Results
2:30 - 3:15 Regulation Cost Analysis and Results
3:15 - 4:00 Load Following Analysis and Results
4:00 - 5:00 Public Questions and Comments

Workshop Questions

  1. Does the current timing of the three-phased approach pose any critical problems in using phase-1 results for procurement at this time? If so, please indicate what specific problems are posed in using the Phase I results, and is there a way to resolve the problems in time to use the results for the procurement?

  2. What changes should be made in the methodology to ensure that it can be used fairly and objectively in a procurement process and take into account maintenance, forced outages and contract?

  3. Some parties have been concerned that the Phase I results are calculated from representative, but aggregated data sets for each of the technologies. How large is the error expected by using the representative, but aggregated data sets? What non-aggregated data sets can be made available for phase II and phase III analysis?

  4. Phase I results provide a consistent method for evaluating "baseline equivalent load carrying capacity (ELCC)" by making assumptions on availability, maintenance and no special scheduling instructions. Comment on the effects of these assumptions on your operations and please propose alternative methods for evaluating the baseline.

  5. Phase I report recommends rolling analysis to integrate newly available data and annual recalculation of ELCC and integration cost valuations. Is this adequate? If not, how often should these calculations be adjusted, and who should be responsible for the analysis?

  6. The results provide baseline values for ELCC. What are specific issues with respect to the adoption of these results?

For those who provided comments after the September 12, 2003, public workshop, please submit additional comments or provide written notice that previous comments still apply.