高压输电线路故障及操作电磁暂态数字计算新方法

A NEW NUMERICAL METHOD FOR COMPUTING ELECTROMAGNETIC TRANSIENTSOF HV TRANSMISSION LINE FAULTS AND CIRCUIT BREAKER OPERATIONS

基于多传输线理论、频域分析法、数值拉氏反变换技术和卷积方法 ,提出了长线路任意点任意短路或断线及断路器开合的电磁暂态计算新方法 ,特别是考虑了电弧故障 ,使暂态仿真更加切合实际。该方法在 ABC相分量上进行计算 ,考虑了线路参数频变的影响 ,适用于均匀换位或不换位的单回线、双回线以及线路传播常数矩阵 Z与 Y不能对角化的情况 ,使故障时刻故障点电压 (对于短路 )或电流 (对于断线 )相角及断路器开合时刻电流相角可任意设定。

A new method for accurately computing the electromagnetic transients on long transmission lines caused by short/open circuit faults or on/off switching operations of circuit breakers is proposed in this paper. It is based on multi-conductortransmission line theory, frequency--domain analysis approach, numerical Laplace inverse transformation and convolution. andespecially the effect of fault electric arcs is considered herein such that the simulation is more realistic. The computation isperformed in ABC reference frames. It has the following advantages: (1) the frequent-dependency of line parameters and theinfluence of fault electric arcs can be taken into account: (2) transposed or untransposed. single-- or double-circuit lines andthe non--diagonalizable line constant matrices Z and Y can be analyzed; (3) phase-angle of voltage (for short--circuit) orcurrent (for open-circuit) at the instant when fault happens and the phase-angle of current at the instant when circuit breakerswitches can be arbitrarily designated.