The project pioneered the low-frequency interconnection technology of islands, built a “land-island-wind power” interconnection system, and continuously sent the 20 Hz low-frequency AC power from the low-frequency wind turbines on the island to the land, in order to develop the abundant wind resources in the middle and ocean areas. Provides a more cost-effective means of conveying.
The picture shows the low-frequency wind turbines and substations of the Taizhou 35kV Flexible Low-Frequency Transmission Demonstration Project. (Photo courtesy of Taizhou Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd.)
According to reports, compared with common transmission methods, low-frequency AC transmission can effectively improve the transmission capacity of the line, increase the transmission distance by reducing the transmission frequency, and can greatly reduce equipment investment and operation and maintenance costs. In addition, the project also changed the situation that Dachen Island was originally powered by a single submarine cable, and greatly improved the reliability of electricity consumption in Dachen Island.
After the project is put into operation, it is expected to achieve an annual power generation of 4.5 million kWh, equivalent to the annual electricity consumption of about 2,000 households, saving 1,800 tons of standard coal and reducing carbon dioxide emissions by 4,480 tons each year.
The picture shows the staff laying the submarine cable of the flexible low-frequency power transmission project. (Photo courtesy of Taizhou Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd.)
“The commissioning of the flexible low-frequency power transmission project has accumulated experience in the transmission and consumption of new energy. It can ensure the safe supply of energy, promote green and low-carbon transformation of energy, and help achieve high-quality carbon peaking and carbon neutrality.” Tang Yiqin, deputy chief engineer of Taizhou Power Supply Company of Zhejiang Electric Power Co., Ltd., said.