徐岩,刘婧妍,付媛,王毅.基于故障模型的环状直流系统暂态量计算方法*[J].电测与仪表,2018,55(13):01-06. Xu Yan,Liu Jingyan,Fu Yuan,WANGYI.Calculation Method of Fault Transient Quantity of Ring DC System Based on Fault Model[J].Electrical Measurement & Instrumentation,2018,55(13):01-06.
基于故障模型的环状直流系统暂态量计算方法*
Calculation Method of Fault Transient Quantity of Ring DC System Based on Fault Model
When multi-terminal flexible DC system occurs pole-to-pole fault, all the conventer station act together, resulting in the fault current increasing rapidly and the fault characteristics are very complex. It is required to remove the fault before the voltage zero crossing point, but also increased the difficulty of solving. Proposing a practical method to solve the current and voltage transient expression. The n-terminal system capacitor discharge process is decomposed into n single-ended capacitor alone process. According to the calculation results, the influence of the parameter change on the fault characteristics is analyzed. The fault model of 3 - terminal ring DC system is built by MATLAB / Simulink software, which verifies the reliability of the method and provides a new idea for the protection setting.