Regional Transmission |
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One of California Independent System Operator’s (CAISO) fundamental roles is to plan and promote the enhancement and expansion of transmission capabilities within its footprint as well as coordinated planning on a regional and subregional level to ensure cost effective and reliable services. We accomplish this through the development of a comprehensive Transmission Plan (TP) in accordance with the terms of the CASIO Tariff and the business rules set forth in Business Practice Manuals. The TP focuses on expansion of the transmission system to support long-term power supply arrangements, long-term transmission rights, and the larger regional bilateral market. This requires development of a transmission planning process that ensures the transmission grid is built in a manner to support rights and system growth. The planning process includes independent analyses and recommendations, opportunities for broad stakeholder input and independent CAISO Board of Governor approval, all of which is integrated into an annual CAISO TP, project-specific reports, and specific resource adequacy studies for transmission-dependent local areas. The planning process can identify opportunities for partnership among CAISO, Participating Transmission Owners, and public and private entities to sponsor needed transmission lines. Regional Transmission focuses on long term planning (3-15 years) and short term planning (0-3 years). Short term planning maintains reliability of the Grid on a day-by-day, hour-by-hour basis by implementing and providing operating procedures, operating tools, 24 hours on-call duty, real-time support and compliance with NERC/WECC Standards.
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Transmission Planning |
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| Reliability Requirements | ||||||
| Local Capacity Requirements (LCR) | ||||||
| Reliability Planning | ||||||
| Generator Interconnection Process | ||||||
| Stakeholder Initiatives - Transmission Planning Related | ||||||
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2009 CAISO Transmission Plan Includes planning activities that took place in 2008 |
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2008 CAISO Transmission Plan Includes planning activities that took place in 2007 |
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2007 CAISO Transmission Plan Includes planning activities that took place in 2006 |
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| 2006 and Earlier Transmission Planning Activities | ||||||
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Transmission Planning Process Flow Diagram pdf 315K | Abstract | 09/25/2007 11:01 |
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Transmission Economic Assesment Methodology Report pdf 1475K | Abstract | 06/03/2004 13:32 |
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Sub-Regional Transmission Planning |
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| San Francisco Stakeholder Study Group | ||||||
| CAISO South Regional Transmission Plan - 2006 (CSRTP-2006) | ||||||
| Southwest Transmission Expansion Plan (STEP, formerly CARTS) | ||||||
| Palo Verde-Devers No. 2 | ||||||
| Northwest/California Subregional Group | ||||||
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Transmission Operations |
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Transmission Outage Reports All transmission outages must be reported to the California ISO with a description of the cause and all remedial actions taken. Information is confidential. Access requires a valid California ISO user certificate. |
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Outage Coordination All forced outages must be reported to the California ISO with a description of the cause and all remedial actions taken. |
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Maintenance Standards and Procedures Developed by the Transmission Maintenance Coordination Committee (an advisory committee to the ISO Board of Governors) and ISO staff based on good utility practices. Standards and procedures serve as guidelines for Participating Transmission Owners (PTOs). |
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Transmission Access Charge (TAC) Charges assessed, on behalf of the Participating Transmission Owner, to parties who require access to the ISO Controlled Grid. |
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Participating Transmission Owners (PTO) The Transmission Owner Tariffs of PTOs and information regarding applications to the California ISO for status as a New Participating TO. |
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Transmission Register A register of transmission facilities within the California ISO Control Area. In accordance with the Federal Energy Regulatory Commission (FERC), the California ISO is to provide limited access to the Register of Transmission Facilities and Entitlements (RTFE) to market participants with a demonstrated, legitimate business need for such access in accordance with specified screening procedures (FERC Order issued Jan 24, 2003, Docket No. ER03-219). RTFE information is treated as critical energy infrastructure information. |
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| Operating Procedures: Transmission | ||||||
| Transmission Planning Studies - Marketer | ||||||
| Transmission Planning Studies - Non-Marketer |