基于PMU的电压不平衡检测研究

Research on Voltage Unbalance Detection Based on PMU

针对三相电力系统电压不平衡检测,利用向量测量单元(PMU)输出下采样负序,应用广义局部最优(GLMP)检测器并推导出数学模型,该方法具有检测灵敏、快速识别突发事件和潜在的故障,并可结合实际电压不平衡加以约束,仿真结果表明提出的方法具有可行性,较好的接近真实值,并具有鲁棒性,该方法实时实现GLMP的采样,可以应用在远程检测和快速处理大数据,为开发网络检测和在线检测提供一定的参考.

Aiming at the three -phase power system voltage imbalance detection, and the phasor measurement unit （PMU） output sampling negative sequence, and the generalized local optimal （GLMP） detector, the mathematical model is deduced. The method is sensitive, rapid identification of emergencies and potential fault. And combining with the actual voltage unbalance, it is constrained. The simulation results show that the proposed method has good feasibility, close to the real value, and the robustness of the method to achieve real - time sampling of GLMP, can be applied in remote detection and rapid processing of large data, which provides a reference for the development of the network detection and online detection.