Day: September 12, 2018

The Trans Bay Cable and Why it is Important

The Trans Bay Cable and Why it is Important

The Trans Bay Cable and Why it is Important


“What is the Trans Bay Cable and why is it so important for the city of San Francisco?”


Grid transmission projects are everywhere where there is a need for electricity. But some are more important than others. Before 2010, the city San Francisco and its southern peninsula were subject to wild grid fluctuations and had to rely on dirty power plants in the center of the city due to its relative geographic isolation from the rest of the state. But soon enough a need for a connection was realized, and The Trans Bay Cable was produced as a result. The Trans Bay Cable is an HVDC current underwater cable that connects San Francisco, California and Pittsburg, California in the East Bay. The cable can provide up to 400 megawatts of power at a DC voltage of ±200 kV( around 40% of San Francisco’s peak power requirements). Once this was completed, San Francisco was able to shut down its central power plants, improving the air quality and carbon emission portfolio of the city. It just goes to show how a little bit of grid planning can make such a huge difference!


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