含分布式电源电网电压跌落定位

电压跌落已经成为现今社会最为关注的电能质量问题之一，电压跌落位置的准确定位是保障电力系统运行稳定以及电力市场化进程的充分条件。分布式电源（distributed generation, DG）在配电网的广泛接入改变了配电网的运行方式和潮流，现有的几种定位方法已经不能满足对含DG电网电压跌落进行准确定位。针对含DG的配电网电压跌落故障源定位，本文基于馈线终端单元的配电网故障定位方法，提出了一种利用改进的具有自适应矩阵法初步确定电压跌落所在的故障区段，然后通过利用改进的阻抗法精确定位电压跌落源位置的方法。算例和仿真结果验证了该矩阵法和阻抗法结合的方法计算量小且具有很好的准确性优势。

Study on Location of Voltage Drop of Power Grid With Distributed Generation

Nowadays, voltage sag has become one of the most concerned about power quality problems, accurately locate the position of the voltage sag is a sufficient condition to ensure the stability of power system operation and the process of electricity market. Distributed generations (DG) are widely connected in the distribution network has changed the direction of the load flow and the operation mode of the distribution networks, several existing location method has not met accurately locate the voltage sag of grid with DG. According to location of voltage drop of distribution network with DG, This paper which based on the distribution network fault location method feeder terminal unit ,presents a method which use preliminary improved adaptive matrix method to determine the fault zone where the voltage sag, and then through the use of improved impedance method accurate locate the location of source of voltage sag . The advantages of the method of the matrix method combining with impedance method in a small amount of calculation and with good accuracy of are verified by results of calculation example and simulation.