Study on Lightning Intrusion Wave Overvoltage of DC Filter in Ultra High Voltage Direct Current Transmission System

As an important equipment of the converter station, the DC filter bears the overvoltage of the lightning invasion wave on the DC line. It is very important to study the overvoltage of the lightning invasion wave under different operating conditions. This paper introduces the configuration of the DC filter and the lightning arrester in the UHVDC transmission system, and establishes the simulation model of the DC filter under different operating conditions. Through the analysis and calculation of the overvoltage of the lightning invasion wave in four operating conditions of the single stage, the data of the overvoltage of the lightning intrusion waves at each point of the DC filter are obtained. The research results provide a theoretical basis for HVDC transmission system's DC filter's lightning intrusion wave overvoltage.