According to foreign media reports, the California Independent System Operator (CAISO) recently stated that it has applied its innovative battery energy storage technology to the U.S. wholesale electricity market. This four-year pilot energy storage project is designed to test and evaluate the performance of flow batteries operating in the commercial wholesale market. The California Independent System Operator (CAISO) said it partnered with San Diego Gas & Electric (SDGE) and Tokyo-based Sumitomo Electric Co. to begin testing flow batteries in 2015, and its battery energy storage system was commissioned in December 2018. Started to enter the system operator wholesale market in March. The vanadium redox flow battery energy storage pilot project has a capacity of 2MW/8MWh and can provide 1,000 home users with 4 hours of electricity. According to a survey report released by the research agency WoodMackenzie and the American Energy Storage Association in March this year, it is expected that the U.S. in 2019 The installed capacity of energy storage deployment will double and exceed 4.4GW by 2024. In 2018, the United States deployed 350.5MW/777MWh energy storage capacity, of which 47% of energy storage systems were deployed on the grid side. Given the increase in renewable energy targets across the country, U.S. utilities and wholesale market operators have good reason to experiment with different types of energy storage technologies to determine which ones will provide the greatest benefit to the grid and consumers. The California Independent System Operator (CAISO) calls energy storage an important strategy that will help California achieve its goal of 100% zero-carbon electricity by 2045. With the increase in the deployment of grid energy storage systems, user peak demand has been reduced and grid operators' ability to balance loads has been improved. California Independent System Operator (CAISO) spokesperson Anne Gonzales said: "Energy storage systems are critical to us achieving our renewable energy goals and some of our clean energy goals." She said the independent system operator is committed to adopting solutions that are economically sustainable. of different energy storage technologies. “The reason why this is so important is that we will have some baseline information and be able to provide evidence as to whether a flow battery energy storage system is economically viable in the market,” Gonzales said. "San Diego Gas and Electric Company (SDGE) spokesperson Helen Gao said that although flow battery technology is also used in other parts of the United States, its flow battery project is the first flow battery energy storage facility deployed by Sumitomo Electric in North America. Peter Klauer, senior advisor for smart grid technology at the California Independent System Operator (CAISO), said that flow battery energy storage systems can make large-capacity energy storage systems more cost-effective because expanding energy storage capacity only requires increasing the size of the electrolyte container, while the liquid Flow battery systems have longer operating lives and experience less degradation over repeated charge cycles. Last September, the U.S. Department of Energy announced $148 million in funding for two separate programs, including a five-year program for United States Energy Storage The Joint Center for Energy Storage Research (JCESR) program, which is responsible for the research and development of new battery materials, provides $120 million in funding. This funding allows the Joint Center for Energy Storage Research (JCESR) to continue researching new materials that can improve the energy density of lithium-ion batteries and Provide funding for flow battery development and research.

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