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| 摘要: |
| 针对小电流接地系统单相接地故障定位的研究现状,提出基于非故障相暂态电流的单相接地故障定位的思想。应用小波变换理论进行分析,总结出非故障相暂态电流随故障点位置变化的规律,并用BP神经网络实现模极大值与故障点位置之间的映射关系,从而进行故障定位。在不同过渡电阻、不同故障距离点情况下的仿真结果证明,该故障定位方法准确可靠。 |
| 关键词: 配电网,故障定位,非故障相暂态电流,小波分析,BP神经网络 |
| DOI： |
| 分类号:TM711 |
| 基金项目: |
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| Locating fault using transient component of non-fault-phase based on wavelet analysis and BP neural network |
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WANG Ming XU Yu-qin
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| Abstract: |
| Combined with the research status of single-phase-to-ground fault locating for small current grounding system,a new idea based on non-fault-phase transient current is presented.Wavelet transfer theory is applied,and the rule of non-fault-phase transient current changing with the fault point location is concluded.The mapping relationship between modulus maximum and fault point location is realized using BP(Back Propagation)neural network.Simulations under conditions with different transition resistors and different fault distances prove its accuracy. |
| Key words: distribution system,fault locating,non-fault-phase transient current,wavelet analysis,BP neural network |
