电测与仪表2018，Vol.55Issue(1)：21-26,52,7.
计及直流系统不同端口相互影响的故障计算方法
Fault calculation method considering the interaction of different ports in DC system
摘要
Abstract
The characteristics of the pole-to-pole fault in the tree DC system are complicated,and the transient analytic expressions of high-order current and voltage can make the difficulty of calculation increase significantly.In response to this phenomenon,on the one hand,when the parameters are the same,the impact of the changes of the number about the terminals on the waveform is considered.On the other hand,when the number of terminals is fixed,the influence of the change of the parameter on the waveform is studied.Based on the analysis of single-ended DC fault,the fault calculation modification method of tree DC system taking into account the interaction between different ports is proposed.This method can reduce the computational complexity of complex DC power network.The calculation results are verified by MATLAB/Simulink simulation tool.The calculated voltage and current values after modification are in good agreement with the results of transient simulation,which provide the theoretical basis for the fault location and calculation of setting value.关键词
树状直流系统/极间短路故障/端数变化/参数变化Key words
tree DC systems/pole-to-pole short circuit fault/number of terminals changes/parameter changes分类
信息技术与安全科学引用本文复制引用
徐岩,刘婧妍..计及直流系统不同端口相互影响的故障计算方法[J].电测与仪表,2018,55(1):21-26,52,7.基金项目
国家重点研发计划(2016YFB0900203) （2016YFB0900203）
