Research and Development of ±800kV/4750A UHVDC Valve

With the development of Chinese economy, the electric power has to be transmitted over long distance and in large scale. UHVDC provides a suitable solution to send power from large scale hydro and thermal power base to remote load centers. It improves distribution of resources, relieves environmental impact and costs less land resource, bringing significant economic and social benefits. As the key equipment in UHVDC project, converter valve plays an essential role in converting electricity from AC to DC and vice versa. CEPRI has developed its own UHVDC converter valve (typed A5000) with independent intellectual property rights and has completed the construction of related type tests capability. This paper describes in detail the testing capability of CEPRI, the R&D of A5000 valve and its type test results. A5000 valve will be used in the Jinping-Sunan ±800kV UHVDC transmission project which has highest transfer capacity up to 7600MW.