【Ten Years of Rapid Development in Chemical Engineering Equipment】From 1296 to 2023: China’s first tidal flat photovoltaic project integrating nuclear, solar, and energy storage systems began generating electricity

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Recently, with the successful commissioning of the 220 kV Qinjiang substation line, it was marked that the 200-megawatt tidal flat photovoltaic project at CNN Sanmen was officially connected to the power grid. This project is also the first tidal flat photovoltaic project in the country to combine nuclear, solar, and energy storage technologies. “The complementary use of various clean energy sources such as nuclear energy, solar energy, and the chemical energy stored in batteries aims to convert these different forms of energy into electricity. Due to the distinct characteristics of different energy sources, the energy network formed by combining them can complement each other, thereby achieving better social benefits. The China Nuclear Sanmen Tidal Flat Photovoltaic Project is located in the southern tidal flat area of the Sanmen Nuclear Power Plant, with an installed capacity of 200 megawatts. The total investment in this project amounts to 1 billion yuan. The innovation of this grid-connected photovoltaic power plant lies in its 24 megawatt-hour energy storage system, which allows energy to be stored during periods of low demand and supplied during periods of high demand, thereby preventing the instability that photovoltaic systems can cause to the power system. The CNPC 220-kilovolt photovoltaic transmission line, constructed by State Grid Taizhou Power Supply Company, involves the construction of 16 kilometers of new lines and 41 transmission towers, with a total investment of 99.5 million yuan. The completion and operation of the 220 kV step-up substation and transmission project have established a transmission route for photovoltaic power generated in tidal flats, enabling green electricity to be delivered to thousands of households. “The electricity generated by photovoltaic power plants will be transmitted through this line, combining nuclear energy, photovoltaic technology, and energy storage solutions to create a new type of power system operation mode in which multiple energy sources work together. ”Hong Sheng, deputy director of the Construction Department at State Grid Taizhou Power Supply Company, said. With the commissioning of this integrated nuclear, photovoltaic, and energy storage project on tidal flats, and assuming an operational life of 25 years, it is estimated that the average annual electricity output will be 210 million kWh. Compared to thermal power generation, this amount would result in an annual savings of 69,500 tons of standard coal, as well as a reduction in carbon dioxide emissions by 139,700 tons, sulfur dioxide emissions by 254.1 tons, and nitrogen dioxide emissions by 508.3 tons. Furthermore, it can also reduce wastewater discharge each year, offering significant environmental and energy-saving benefits.