基于Spearman相关系数法与有功分量法的高阻接地故障选线方法研究  

Research on High-resistance Grounding Fault Line Selection Method Based on Spearman Correlation Coefficient and Active Component

作　　者：季鹏 陈芳芳[1] 徐天奇[1] 霍艺文 齐琦 JI Peng;CHEN Fangfang;XU Tianqi;HUO Yiwen;QI Qi(School of Electrical Information Engineering,Yunnan Minzu University,Kunming 650500,China;State Grid Shandong Boxing County Power Supply Company,Boxing 256500,China;State Grid Heilongjiang Province Yichun Power Supply Company,Yichun 153000,China)

机构地区：[1]云南民族大学电气信息工程学院,云南昆明650500 [2]国网山东省电力公司博兴县供电公司,山东博兴256500 [3]国网黑龙江省电力有限公司伊春供电公司,黑龙江伊春153000

出　　处：《山东电力技术》2022年第12期8-13,31,共7页Shandong Electric Power

基　　金：国家自然科学基金项目(61761049)。

摘　　要：电力系统中的谐振接地系统发生高阻接地故障时,由于消弧线圈和高阻抗的存在使得故障信号微弱,造成故障选线较为困难,从而危及电力系统的安全运行和电能质量。因此,电力系统的故障选线尤为重要,故提出一种基于Spearman相关系数与有功分量相结合的故障选线方法。首先通过分析线路之间零序电流的幅值,利用零序电流最大值判据判断出母线故障或线路故障,若判断故障为线路故障,再利用零序功率最大值判据初步确定出故障的线路,最后通过Spearman相关系数法分析线路零序功率波形间的相关性来确定出具体发生故障的线路。经PSCAD/EMTDC仿真验证该方法原理清晰,选线逻辑简单可靠且不受故障距离与过渡电阻的影响。When high-resistance grounding fault occurs in resonant grounding system of power system,the fault signal is weak due to the existence of arc suppression coil and high impedance,which makes fault line selection more difficult,thus endangering the safe operation of power system and the quality of electric energy.Therefore,the fault line selection of power system is particularly important.A fault line selection method based on Spearman correlation coefficient and active power component was proposed.By analyzing the amplitude of zero sequence current between lines,the bus fault or line fault was judged by using the maximum criterion of zero sequence current.If it was judged that the fault was a line fault,the fault line was preliminarily determined by using the criterion of maximum zero sequence power.The correlation between zero sequence power waveforms was analyzed by Spearman correlation coefficient method to determine the specific fault line.PSCAD/EMTDC simulation shows that the principle of the proposed method is clear,the line selection logic is simple and reliable,and it is not affected by fault distance and transition resistance.

关 键 词：故障选线 单相接地故障 Spearman相关系数 零序功率 有功分量法 

分 类 号：TN713[电子电信—电路与系统]