基于序增量功率电流方向追溯电压暂降源的方法

发布时间：2018-03-09 06:02

本文选题：电能质量　切入点：电压暂降　出处：《电力系统自动化》2017年06期 　论文类型：期刊论文

【摘要】：电压暂降已经成为最受关注的电能质量问题之一。提出一种基于序增量功率电流方向追溯电压暂降源的方法。首先以电流、电压互感器的同名端确定一个监测点的正参考方向。监测点的正序增量功率电流为正,三相对称电压暂降源位于监测点正参考方向的相同方向,即下游,反之则在上游;监测点的负序增量功率电流为正,三相不对称电压暂降源位于监测点正参考方向的相反方向,即上游,反之则在下游。仿真及实验室模拟测试都证明:所提出的追溯电压暂降源的方法能准确地追溯辐射式配电网中由各种电网故障引起的电压暂降源。该方法计算简单、运算量小,适合于单片机完成,可嵌入在继电保护器中,由保护器完成电压暂降源的追溯。
[Abstract]:Voltage sag has become one of the most concerned power quality problems. A method of tracing voltage sag source based on sequential incremental power current is proposed. The same name terminal of the voltage transformer determines the positive reference direction of a monitoring point. The positive sequence incremental power current of the monitoring point is positive, and the three-phase symmetrical voltage sag source is located in the same direction of the positive reference direction of the monitoring point, that is, downstream, otherwise in the upstream. The negative sequence incremental power current of the monitoring point is positive, and the three-phase asymmetrical voltage sag source is located in the opposite direction of the positive reference direction of the monitoring point, that is, upstream. On the contrary, it is proved by simulation and laboratory simulation that the proposed method can accurately trace the voltage sag source caused by various network faults in the radiation distribution network. Suitable for single-chip microcomputer, can be embedded in the relay protector, by the protector to complete the voltage sag source traceability.
【作者单位】：中国矿业大学信息与电气工程学院;国网淮安供电公司;
【分类号】：TM714.2

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