Adaptability Analysis of Fault Component Directional Elements in the Transmission Line of Large-Scale Wind Farms

This article takes the large-scale doubly-fed wind farm into the power system as the background, considers the Crowbar circuit input and converter control strategy, and comprehensively considers the different voltage drop depths, slip rates, Crowbar resistance, and active power indicators of the doubly-fed wind turbine under grid fault. And reactive power indicators, theoretically calculate the positive and negative sequence impedance fluctuations on the wind turbine side when a fault occurs, combine the positive and negative sequence impedance fluctuations with the conventional sequence fault component directional element(FCDE) criterion, and analyze the sequence fault component directional element when the large-scale doubly-fed wind power is connected to power The adaptability of the system is finally verified by PSCAD/EMTDC simulation to verify the correctness of the theoretical analysis.