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电网技术  2007 

架空线路电弧故障的非线性估计单端测距方法

, PP. 82-87

Keywords: 架空线路,故障测距,观测方程,非线性估计,电力系统

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Abstract:

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。

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