Summary of contents: On December 2, the national “Twelfth Five-Year Plan” key project in Nuozhadu Hydropower Station transmits power to Guangdong ±800 kV DC transmission project, and Xiluodu Right Bank Power Station transmits power to Guangdong ±500 kV on-site double-circuit DC transmission project (referred to as The "two crossing project" ceremony was held in Pu'er City, Yunnan Province.

The reporter was informed that the "Doudu Project" is a major energy construction project and autonomous demonstration project of the "West-to-East Electricity Transmission Project" during the "12th Five-Year Plan" period. The total length of the line is more than 4,000 kilometers and the total investment is 33 billion Yuan. V. Power grid construction projects with the most investment, the largest transmission capacity, and the longest transmission distance.

After the “two crossings project” is completed and put into operation, it will add 11.4 million kilowatts of “West-to-East Electricity Transmission” power, and more than 40 billion kilowatt-hours of hydropower will be sent to the Pearl River Delta each year, which will reduce local carbon dioxide emissions by about 34 million tons.

The newly-built Nuozhadu to Guangdong ±800 kV DC transmission project (abbreviated to “Zhazhadu DC project”) is the second UHV DC project following the ±800 kV Yunguang UHV DC demonstration project by China Southern Power Grid Corporation. Transmission engineering, on the basis of drawing lessons from UHV mature technologies, the proportion of domestically produced equipment will be further increased. In the past, the proportion of domestically produced DC equipment in the core equipment will exceed 40%; Xiluodu right bank power station in Guangdong ± 500 thousand FuTongTong ShuangHui HVDC Transmission Project (abbreviated as “Xiluodu HVDC Project”) is the world's largest double-circuit DC transmission project with the largest transmission capacity and the longest transmission distance. The valve station, DC field and AC field of the converter station are required for this project. All of them are developed and produced by domestic manufacturers, and the localization rate basically reaches 100%. The once again significant increase in the localization rate means an increase in the rate of autonomy, which has become the biggest challenge for the construction of the “two-pass” power transmission project, and it also poses certain risks for the later operation and maintenance of the project. Therefore, the construction of the "two-pass project" places extremely stringent requirements on key technologies and process quality.