California Needs Better Transmission

California’s power woes have been all over the headlines for the past few years. The problem is pretty simple: Hotter weather is driving up electricity demand all while wildfires knockout transmission lines or force operators to preemptively take them off line, and hydropower generation slumps because of drought. To mitigate these problems, California has invested big money in batteries to store the energy generated by the state’s abundant solar panels and has beefed up energy efficiency programs. They’ve also decided to put off closing some dirty power plants, much to the chagrin of many environmentalist groups. 

However, it doesn’t seem that California’s reliability efforts have been very successful. Heading into this summer, CAISO, the state’s grid operator, released an assessment that showed they were only negligibly better prepared for 2020-like events. The North American Electricity Reliability Corp. (NERC) came to a similar conclusion in its 2021 Summer Reliability Assessment. The report mentioned that even periods of normal peak demand would risk depleting the state’s energy resources. The assessment estimated that 10,185 MWh would go unmet in Summer 2021. 

How can California expect to solve its current issues while simultaneously completing its transition to renewables? Some commentators will claim better and cheaper batteries are the answer. Storage will undoubtedly get better and cheaper in the coming years, however it won’t be a silver bullet as early as 2035. No, to provide reliable electricity in an ever hotter and more electrified California, the state must build a more robust and extensive transmission network. 

This summer’s horrifying North West heatwave was testament to the importance of good transmission infrastructure. During the worst of the historic heatwave in the early summer, a great deal of utilities in the region failed to meet peak demand at times. One exception was Pacific Power, who had relatively few problems thanks in large part to PacifiCorp’s robust network of high-voltage transmission lines that spread across ten states. 

California should adopt a similar model as part of their plan to be carbon neutral by 2035. Luckily, a number of proposals are already under consideration. Perhaps most notable is the Southwest Intertie Project-North (SWIP-North). The project would connect hydro and wind generation from Wyoming, Idaho and Washington to Cali’s grid through a relatively low fire risk path. 

Transmission is not the answer to providing clean, reliable energy in the west. However, it’s a huge part of the answer. Now is the time to end our nation’s transmission stagnation and get to work developing a power infrastructure fit for the 21st century.