Simulation and analysis of flexible DC transmission for high proportion power electronic power system based on typical power grid

The purpose of this study is to analyze the application simulation of flexible DC transmission for high-proportion power electronic power system based on Qinghai Power Grid, a typical new power system in China. By studying the operation data of the flexible DC transmission system in Qinghai power grid, the performance of the system in actual operation is evaluated, including power transmission efficiency, stability, new energy absorption ability and so on. At the same time, this paper discusses the transient overvoltage, harmonics and other problems arising from the application of high-proportion power electronic devices in the flexible DC transmission system and the corresponding solutions, so as to provide theoretical basis and practical guidance for the further optimization and development of flexible DC transmission technology in Qinghai power grid and other similar power grids, so as to improve the reliability and stability of power grid operation. Promote the large-scale development and effective utilization of new typical grid clean energy.