基于电流积分的HVDC系统阀短路故障分类与定位方法

发布时间：2018-06-24 08:21

本文选题：高压直流输电系统 + 电流积分　；参考：《电力系统自动化》2017年20期

【摘要】：为实现高压直流输电(HVDC)系统阀短路故障的快速有效处理,提出了一种基于电流积分的阀短路故障分类与定位方法。定义六脉动换流器电流路径中的"交流截面""上桥臂截面"和"下桥臂截面",计算出采样窗内流过各截面的电流积分,以其大小关系为判据,区分交流侧相间短路、桥臂短路和直流出线短路3种典型阀短路故障类型;针对桥臂短路故障,进一步计算出采样窗内各交流支路和其对应桥臂支路的电流积分差值,定位故障桥臂。基于CIGRE模型的仿真结果表明,该方法能快速分类与定位阀短路故障,且不受故障时刻、噪声和采样窗长的影响。
[Abstract]:In order to realize the fast and effective treatment of valve short circuit fault in high voltage direct current transmission (HVDC) system, a new classification and positioning method based on current integration is proposed. The "AC cross section" and "lower bridge arm cross section" in the current path of the six pulse converter are defined, and the current integral of each cross section in the sampling window is calculated. The size relation is the criterion, which distinguishes 3 typical types of typical valve short circuit faults in AC side short circuit, bridge arm short circuit and DC outline short circuit. In view of bridge arm short circuit fault, the current integral difference between each communication branch and its corresponding bridge arm branch in the sampling window is further calculated and the obstacle bridge arm is positioned. The simulation results based on the CIGRE model show that this side is used. The method can quickly classify and locate the short circuit fault of the valve, and is not affected by the time of failure, noise and the length of the sampling window.
【作者单位】：西南交通大学电气工程学院;国网四川省电力公司电力科学研究院;
【基金】：国家重点研发计划资助项目(2016YFB0900600)~~
【分类号】：TM721.1

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