Editorial Department of Power Generation Technology
Doi
Abstract
ObjectivesTo address the serious high voltage ride-through (HVRT) problem faced by wind farms as a result of the large voltage surge at the grid-connected point after a DC fault, a recovery mechanism of “active priority balancing - reactive power dynamic compensation” considering the coordination of protection action time is proposed.MethodsBased on the double closed-loop control function of doubly-fed wind turbine, the dynamic characteristics of the reactive power response speed of the rotor side converter is better than that of the grid side converter are revealed. Under the load shedding mode, a HVRT strategy of wind farm considering coordinated recovery of active and reactive power is proposed.ResultsBy balancing active power and reactive power dynamic compensation, the dual objectives of voltage stabilization and energy balance during faults are achieved. Simulation results show that this strategy can effectively suppress the risk of transient overvoltage and improve the HVRT capability of wind farms.ConclusionsThe proposed strategy effectively solves the contradiction between system power imbalance and safe operation of equipment during HVRT through the active-reactive synergistic regulation mechanism, which provides a new idea for transient voltage stabilization control of power systems containing large-scale wind power
