架空线路电弧故障的非线性估计单端测距方法

电弧闪络在架空输电线路故障中占很大比例，而大多数故障测距研究没有考虑到电弧的非线性特性。文章提出了一种基于电弧特性的单端故障测距新方法，研究了Mayr模型下线路闪络时交流电弧的频谱特征，依据超高压输电线路首端测量数据构造观测方程，并采用非线性状态估计的方法求解电压特性与故障电弧特性最接近的位置，为电力线路故障测距问题的研究提供了一种新的思路。仿真结果表明，该方法具有较好的稳定性和较高的测量精度。

A Nonlinear-Estimation Algorithm of Single-Terminal Arcing Fault Location for Overhead Transmission Lines

Although a great many faults occurred on overhead transmission lines can be attributed to arc flashover, the nonlinear characteristic of arc is seldom considered in most researches on fault location. Based on arc characteristic the authors propose a new single-terminal fault location algorithm. For this purpose the spectrum signature of AC arc is researched under Mayr arc model while the flashover occurs on transmission lines; according to the data measured at beginning end of EHV transmission line the observational equation is constructed, then by means of nonlinear state estimation the position, where the voltage characteristic is mostly close to fault arc characteristic, is solved; thus, the proposed method provides a new thinking for transmission line fault location. Simulation results show that the proposed algorithm is more stable and higher fault location accuracy can be obtained.