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The report pointed out that the self-developed positive and negative 800 kV, 4750 ANT HVDC converter valve prototype passed the new product technology appraisal recently, filling the gap in the core technology of China's HVDC transmission project. The ±800 kV, 4750 amp HVDC converter valve delivers up to 7.6 million kilowatts of transmission capacity, delivering the highest voltage and flow capacity in the world. The prototype was developed and manufactured by the China National Power Research Institute of China Power Grid for six years and has completely independent intellectual property rights. The advent of prototypes has made China the third country in the world after Switzerland and Germany to master the design, manufacture and test technology of UHV DC converter valves. 
On September 7, CCTV News Channel’s “News Live†section reported that the “±800kV/4750A UHV DC Converter Valve†independently developed by the State Grid Corporation of China Electric Power Research Institute passed the assessment of the National Energy Administration.