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中国已向瑞士的BBC公司和西德的西门子AG公司订购高压直流输电线用的两座换流站。 BBC公司将充当该项目的主要承包商。这两座换流站是由距上海市1000公里的长江上各水电站向上海输电的±50万伏输电线路的主要组成部分。
China has ordered two converter stations for HVDC transmission lines from BBC in Switzerland and Siemens AG in West Germany. BBC will act as the prime contractor for the project. These two converter stations are a major part of the ± 500,000-volt transmission line to Shanghai from various hydroelectric stations on the Yangtze River 1000 kilometers away from Shanghai.