Overview
Tassajara Substation is a 230 kV electrical substation operated by Pacific Gas and Electric Company in California, United States. It plays a key role in the regional transmission grid.
Tassajara Substation is a high-voltage electrical substation located in California, United States, and operated by Pacific Gas and Electric Company (PG&E). The facility operates at 230 kV, placing it within the transmission-level voltage band typical for bulk power transfer across the state's interconnected grid. As a 230 kV substation, Tassajara is subject to North American Electric Reliability Corporation (NERC) reliability standards and Federal Energy Regulatory Commission (FERC) regulations governing transmission assets. PG&E, as the owner and operator, must comply with mandatory reliability requirements, including those for voltage support, protection systems, and cybersecurity. The substation likely employs modern switchgear and automation technologies consistent with ISO/IEC 61850 standards for substation communication. Tassajara Substation contributes to grid stability in the San Francisco Bay Area, supporting local distribution networks and integrating renewable energy resources. Its operational status ensures reliable electricity supply to residential, commercial, and industrial customers in the region, underscoring its importance to California's energy infrastructure.
Environmental context
The substation is located in a semi-rural area of Contra Costa County, California, characterized by Mediterranean climate with hot, dry summers and mild, wet winters. The surrounding landscape includes grasslands and oak woodlands, which may be sensitive to electromagnetic fields and habitat fragmentation from transmission corridors. PG&E's operations are subject to California Environmental Quality Act (CEQA) reviews and local land-use regulations to mitigate impacts on wildlife and vegetation.
Frequently asked questions
Tassajara Substation is located in California, United States, near the coordinates 37.800040, -121.907636, in Contra Costa County.
Tassajara Substation operates at 230 kV, which is a standard transmission voltage level for bulk power transfer in the United States.
Tassajara Substation is owned and operated by Pacific Gas and Electric Company (PG&E), a major investor-owned utility serving northern and central California.
As a transmission-level substation, Tassajara Substation must comply with NERC reliability standards and FERC regulations, including requirements for grid stability, protection systems, and cybersecurity.
Tassajara Substation steps down high-voltage transmission power for local distribution, supporting electricity supply to residential, commercial, and industrial customers in the San Francisco Bay Area.