同杆并架双回线故障测距的新算法

New Fault Location Algorithm for Double Tramsmission Line on Some Tower

基于同杆并架双回线集中参数模型,提出了一种利用电磁耦合关系的双端测距算法.该方法是建立在集中参数模型基础上,依据相间、线间电气量耦合关系计算沿线分布电压,利用从两端计算的故障点电压相等这一原理构造测距方程.该算法避免了利用六序分量法解耦,因此,也能够用于不完全换位输电线路的故障测距;采用集中参数模型构造算法,大大减小了计算量.仿真结果表明,该算法具有较高测距精度,且不受双端数据同步、负荷大小和过渡电阻的影响.

Based on the lumped parameter models of the double transmission line on the same tower , the paper proposed a new fault location algorithm which use the relationship of electromagnetic coupling be -tween the double lines .This algorithm calculates the distributing voltage along the lines by using the rela-tionship of electromagnetic coupling between conductors , then we can structure equations by using the principle of the distributing voltages calculate from the two side are equal .The algorithm avoid using the method of six sequence fault component to decoupling parameters , so the algorithm is suited to the no-complete transposition line .The calculation model adopts the lumped parameter models , so the calculated amount is decreased .The PSCAD simulation test indicates that the new algorithm has higher accuracy and is not affected by the load size , transition resistance or the synchronization of data .