my country's first 'AC to direct' power transmission project completed and put into operation

According to news from this site on April 29, on April 28, the first “AC to DC” power transmission project in China - Yangzhou-Zhenjiang ±200 kV DC transmission project was officially completed and put into operation.

The project started on December 15, 2022. It was designed by China Energy Construction Jiangsu Institute. The project adopts ±200 kV DC transmission method. The maximum single-circuit DC transmission capacity is about 1,200 MW, and 2 new converter stations will be built. The DC line starts from Shaoyou Converter Station in Situ Town, Gaoyou City, Yangzhou City, and ends at Jindong Converter Station in Dagang New District, Zhenjiang City. The entire route The total length is 109.839 kilometers. The pictures attached to this site are as follows:

▲ Picture source State Grid Jiangsu Electric Power Co., Ltd.

According to reports, compared to communication For power transmission, DC transmission with the same voltage level delivers greater power and smaller electrical losses. The transmission capacity has been increased from approximately 500,000 kilowatts to 1.2 million kilowatts. In addition to increasing the transmission capacity, "conversion from interchange to direct line" can shorten the construction period by nearly 6 months and reduce expenditure by nearly 60 million yuan compared with the new cross-river line.

State Grid Jiangsu Electric Power Co., Ltd. stated that as a key project in the construction of my country's new power system, this project will transform the transport flow transmission line into a DC transmission line for the first time, solving the huge demand for electricity in the world's power transmission engineering field. It provides a "Chinese solution" to power grid development problems such as high power grid saturation and high degree of power grid saturation and limited space for new construction.

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