基于PSCAD单芯电力电缆故障暂态仿真建模

Transient simulation modeling of single power cable fault based on PSCAD

通过PSCAD建立了多回路高压单芯电缆仿真模型,分别对主绝缘故障和外护套绝缘故障进行了仿真.结果表明:主绝缘故障时,故障相导体中的初始暂态电流与本相金属护层中初始暂态电流极性相同;外护套绝缘故障时,故障相金属护层中的初始暂态电流与本线路非故障相金属护层中的初始暂态电流极性相反.

A high voltage single-core cable simulation model of multi-loop is established with PSCAD,which makes simulation test on the fault of main insulation and outer sheath insulation respectively.As is shown in the result of simulation,when faults occur on main simulation,the initial transient current in conductors of fault phase has the same polarity with the initial transient current in metal protecting layers of original phase.When faults occur on outer sheath insulation,the initial transient current in metal protecting layers of fault phase has the opposite polarity with the initial transient current in metal protecting layers of non-fault phase.