交直流混合配电系统中的交流窜入直流故障仿真分析

Simulation Analysis of AC Intrusion into DC Fault in AC-DC Hybrid Power Distribution System

主要针对交直流混合配电系统中交流窜入直流故障进行仿真分析。首先分析了交流窜入直流故障机理,将交流窜入直流故障分为内部交流窜入故障和外部交流窜入直流故障;然后构建交直流混合配电系统的典型架构,在MATLAB/Simulink中搭建仿真模型,分别验证内部交流窜入直流和外部交流窜入直流的故障特征,为直流系统的交流窜入直流保护奠定理论基础。

The AC intrusion into DC fault in the AC/DC hybrid power distribution system is simulated and analyzed.Firstly,the mechanism of AC intrusion into DC fault is analyzed.The AC intrusion into DC fault is divided into internal AC intrusion into DC fault and external AC intrusion into DC fault.Then,a typical architecture of AC-DC hybrid distribution system is constructed,and a simulation model is built in MATLAB/Simulink to verify the fault characteristics of internal and external AC intrusion into DC fault,which lays a theoretical foundation for AC intrusion into DC fault protection of DC system.