Testing Research on Auxiliary Circuit Oscillation Characteristic Parameters for High Voltage DC Transfer Switch

摘要

In order to achieve the safety and reliability running of high voltage DC transfer switch, the field testing system of auxiliary circuit oscillation characteristics are researched in this paper. The type, structure principle and transfer mathematics model of high voltage DC transfer switch are analyzed, proposed the testing principle and method, completed the capacitor and current attenuation characteristics testing for four type DC switch, calculated the characteristic parameters of auxiliary circuit (such as the attenuation period, oscillation frequency, loop inductance, damping resistance, etc.), which based on the characteristic requirement of DC switch in a ±800kV converter station. The test results show that the oscillation characteristic parameters of four type DC switch auxiliary circuits can meet the requirements of HVDC transmission system, and also proved the validity and correctness of the testing method and system. It can provides the basis for the field testing application in the UHV converter station.