输电线路不对称短路故障关键暂态信息获取方法

发布时间：2018-03-22 06:38

本文选题：故障行波重现　切入点：反演理论　出处：《电网技术》2017年08期 　论文类型：期刊论文

【摘要】：准确获取输电线路故障点的关键暂态信息,对线路故障原因辨识及线路改造方案的制定都有重要意义。在分析不同类型短路故障行波的基础上,对输电线路不对称短路故障关键暂态信息的获取方法进行了研究。首先利用反演理论,推算出所需的故障点暂态电流波形。结合短路故障类型,构建了基于故障点模量电流幅值、故障角及故障电阻的数学模型并采用改进萤火虫算法(improved firefly algorithm,IFFA)进行求解。仿真结果表明,该方法可准确重现故障点的故障行波,实现关键暂态故障数据的挖掘,有望为输电线路不对称接地故障的故障原因辨识及线路改造提供帮助。
[Abstract]:Accurate acquisition of critical transient information of transmission line fault points is of great significance for line fault cause identification and line reconstruction scheme formulation. Based on the analysis of traveling waves of different types of short-circuit faults, In this paper, the method of obtaining critical transient information of asymmetric short-circuit fault of transmission line is studied. Firstly, by using inversion theory, the needed transient current waveforms of fault point are calculated, and combined with the type of short-circuit fault, A mathematical model based on the amplitude of modulus of fault point, fault angle and fault resistance is constructed and solved by improved firefly firefly algorithm. The simulation results show that the proposed method can accurately reproduce the fault traveling wave at fault point. It is expected that the mining of critical transient fault data will be helpful for the identification of the fault causes of the asymmetrical grounding faults of transmission lines and the improvement of the transmission lines.
【作者单位】：上海交通大学电气工程系;国网山东省电力公司济宁供电公司;
【基金】：国家自然科学基金项目(51307109)~~
【分类号】：TM75

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