California Independent System Operator
| Company type | Non-profit Independent System Operator |
|---|---|
| Industry | Electric power transmission |
| Founded | 1998 |
| Founder | California Legislature |
| Headquarters | California , United States |
Area served | California |
Key people | Elliot Mainzer (President and CEO), Roger Collanton (Vice President), Stacey Crowley (Vice President), Neil Millar (Vice President), Petar Ristanovic (Vice President), Mark Rothleder (Vice President), Ryan Seghesio (Vice President), Eric Schmitt (Vice President), Jodi Ziemathis (Vice President) |
| Products | Electricity market administration, bulk electric power system operation, transmission line management |
| Website | www |
The California Independent System Operator (CAISO) functions as a non-profit Independent System Operator dedicated to serving California. It oversees the state's bulk electric power system, manages transmission line infrastructure, and administers the electricity market operated by its member utilities. Ranking among the largest ISOs worldwide, CAISO delivers approximately 300 million megawatt-hours annually and controls nearly 80% of California's electricity transmission.
History
CAISO was created by the California Legislature in 1998 during a period of restructuring in the state's electricity market. This establishment followed guidance from the Federal Energy Regulatory Commission (FERC), which acted after the federal Energy Policy Act of 1992 eliminated obstacles to competition within wholesale electricity generation. Because it supervises interstate transmission lines, CAISO falls under FERC’s regulatory jurisdiction as per federal commerce statutes.
Management
The organization's governance is composed of a board appointed by the Governor of California alongside an executive management team.
Current leadership includes:
- President and CEO: Elliot Mainzer
- Vice Presidents: Roger Collanton, Stacey Crowley, Neil Millar, Petar Ristanovic, Mark Rothleder, Ryan Seghesio, Eric Schmitt, and Jodi Ziemathis
Renewables
By 2018, California led all states in generating electricity from solar, geothermal, and biomass sources and ranked fourth for conventional hydroelectric power production. As of 2017, renewable energy accounted for over 52% of the state's electricity supply. CAISO issues daily updates that compare renewable generation levels against total system demand.
Blackouts
CAISO agreed to a $6 million settlement with both the Federal Energy Regulatory Commission and the North American Electric Reliability Corporation due to violations of standards linked to the 2011 Southwest blackout.
During August 2020, CAISO directed utilities to implement power outages affecting between 200,000 and 250,000 customers amid extreme heat and peak electricity usage. These rolling blackouts occurred despite having considerable power reserves and contradicted CAISO’s 2019 policy that limited stage 3 emergencies to situations where available resources dropped below 3%. At that time, reserves were at 8.9%, nearly three times higher than the threshold.
On September 6, 2022, California experienced a record-breaking Western heatwave with peak electricity demand reaching 52,061 megawatts. Thanks to conservation efforts, widespread rolling blackouts were largely avoided; however, CAISO instructed municipal utilities in Palo Alto and Alameda to reduce load, causing outages for several thousand customers. The CEO attributed effective management during this peak event to the addition of 3,300 megawatts of grid storage battery capacity since 2020.
See also
- Energy in California
- Energy law
- List of United States electric companies
- Deregulation of the Texas electricity market
External links
- Official website
- Western Energy Imbalance Market operated by CAISO video