A novel method for multi-fault location utilizing fault fitting degree
A new algorithm is proposed to locate multi-fault based on fault fitting degree for complex large power grid. In the normal operating condition, the node admittance matrix is formed according to the network topology structure. When multiple faults occur, by analyzing the fault branch node voltage equation, the fault equivalent model of fault branches and node-branch correlation matrix are formed. Based on superposition theorem, the virtual fault location and fitting degree of each combination of faults can be calculated by the least square method. Then fault line and fault location are determined. The simulation results of 10-generator 39-bus system verify the validity and feasibility of this algorithm.