Recently, ABB successfully tested the world's largest power 1,100 kV HVDC Transformer, including high-end and low-end transformers, to be used in Changji-Kuquan ± 1100 kV HVDC transmission line to lay a solid foundation for the completion of the line basis.
It is learned that the Changji-Kuquan ± 1100kV UHVDC transmission line project is the second UHV DC transmission project in Xinjiang that implements "Xinjiang Power Transmission". It starts from Changji Converter Station in Xinjiang and ends at Guquan Converter Station in Anhui Province. It passes through six provinces and autonomous regions. The total route length is about 3304.7km and the transmission capacity is 12000MW. Changji - Guquan ± 1100kV UHVDC transmission line is the world's first ± 1100kV UHV DC transmission line, setting a new world record in voltage level, transmission capacity and distance. The project's transmission power reached 12 million kilowatts, the equivalent of 12 large-scale power plant power. Compared with the ± 800kV HVDC transmission project currently in operation, the transmission capacity has been increased by 50%. This project also increased the transmission distance from 2000km to more than 3000km. In order to realize the large-scale integration of renewable energy in remote areas Has played a key role.
After the project is put into operation, eight 500 kV and two 1000 kV AC lines will be provided with power. At the same time, this groundbreaking technology is also connecting the ± 1100 kV UHV DC transmission line to the 750 kV AC line for the first time. In addition, ABB developed and successfully tested a number of other key equipment for the project, including flow control valves, bushings, DC circuit breakers and more.
Electricity load in China is concentrated in the east, while a large amount of energy resources are distributed in the west and northwest. The increasing demand for electricity drives the construction of UHV lines. The technology effectively supports long-distance, low-loss, high-capacity transmission, laying the foundation for inter-regional and inter-national grid interconnection in the future.
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