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On December 12, the Jinping-Sulan ±800 kV HVDC transmission project was officially put into commercial operation. The project is a key project of the country's “West-to-East Electricity Transmissionâ€, starting from the Xichang Jinping Converting Station in the west and Tongli Converting Station in Wujiang City, Jiangsu Province. The route passes through Sichuan, Yunnan, Chongqing, Hunan, Hubei, Zhejiang and Anhui. Eight provinces and cities in Jiangsu, including 2,059 kilometers in length, are responsible for the task of sending electricity out of the Yalong River basin. This is to promote hydropower development in the southwestern region and ease the tension in East China, implement national energy strategies, promote energy conservation and emission reduction, and realize energy resources. It is of great significance to optimize the configuration in a wider range.
After the project is completed and put into operation, the annual transmission of electricity to eastern China will be approximately 36 billion kilowatt-hours, equivalent to 16.8 million tons of coal, which will reduce emissions of carbon dioxide by 32.4 million tons per year. The Jinsu project is the UHV DC project with the largest transmission voltage, the longest transmission distance and the largest transmission capacity. It represents the new peak of the world's DC transmission technology.
In the ±800 kV Jinping converter station, the Jinsu project realized for the first time a complete set of design for the domestic UHV DC transmission project. All low-end converter transformers were independently developed by the domestic and the first application of localized converter transformer DC sets. tube. The self-developed ±800 kV HVDC transmission valve has its own independent intellectual property rights, and all technical indicators have reached the international advanced level. DC field pole line 816 kV DC isolation switch fills the domestic gap and reaches the international advanced level, further enhancing the independent innovation capability of China's power transmission manufacturing industry.