Fault Location and Isolation of Distribution Network with Distributed Generation Based on Multi-Agent Matrix

With a large number of distributed power sources connected to the grid, the operation mode and network topology of the distribution network become more complex, and the power flow distribution is also changed, so the traditional fault location method is not applicable. In this paper, a fault location and fault isolation method based on multi-agent matrix is proposed. When the feeder section fails and the node information is distorted, we need to establish a distributed multi-agent matrix and use the matrix algorithm to locate the fault suspected sections. Then introducing the Bayesian probability formula to find the real fault sections from the fault suspected sections. After obtaining the fault information of the distribution network, the fault information matrix is obtained, multiplied with the network topology matrix to obtain the corresponding switch tripping matrix, and finally the switch that needs to be tripped is determined to achieve fault isolation. The simulation results show that the proposed fault location and fault isolation method can determine the occurrence of node information distortion and single-circuit multi-section fault in the distribution network. It also can solve the problem that the fault location fails when the master station fails. After the fault is located successfully, the proposed fault isolation algorithm can also isolate the fault section quickly and accurately.