戴丽莉,张广勇,原菊梅,闫根弟,张烨.基于改进图像法的换流阀严格无源宽频建模[J].电测与仪表,2017,54(4):. Dai Lili,Zhang Guangyong,Yuan Jumei,Yan Gendi,Zhang Ye.Wideband and Passivity Modeling of Converter Valve Based on The Modified Image Method[J].Electrical Measurement & Instrumentation,2017,54(4):.
基于改进图像法的换流阀严格无源宽频建模
Wideband and Passivity Modeling of Converter Valve Based on The Modified Image Method
As the pivotal device of HVDC, converter valve will be exposed to various kinds of overvoltage(thunder and VFTO and so on).The frequency domain of these overvoltage is wide, which up to dozens even hundreds MHz. And research the harm of the overvoltage by the use of simulation is very needed, but the common simulation software (EMTP and PSCAD) are only suitable to the frequency under 10kHz. Thus, there need to build the wideband model of the converter valve and the model can be used in the EMTP and PSCAD. In this paper, first of all, the wideband characteristics of the valves’ components are measured by vector network analyzer; then get the wideband models of the components by the modified image method; lastly, compare the wideband models with the measurements by the frequency scan of the EMTP, and it is proved that the models are accurate. Besides, the parameters of the models are non-negative, that means the model is passive.
