Modeling Optimization and Simulation of Grid-connected Direct-Driven Permanent Magnet Wind Power System Based on Small Signal Stability Analysis
Power system stability problem has always been the focus of attention.The various signals are likely to produce impacts on power system.The connection of inverter sources such wind generation to power system increases the probability of disturbance and uncertainty.The traditional simulation methods based on electromagnetic transient cannot solve the problems in inverter control strategy.This paper employs the small-signal stability analysis to study the power system stability problem when direct-driven permanent magnet wind power generator is connected to infinite grid.The small-signal model was built,including wind turbine,permanent-magnet synchronous wind generator,controller for AC/DC inverter,L-shape filter,controller for DC/AC inverter,and DC-link capacitor.Its small-signal stability was analyzed by means of eigenvalues analysis.The simulation model was built based on PSCAD/EMTDC for simulating wind velocity mutation,which verifies the correctness of the small-signal modeling and analysis.
NETL
NSTL
万方数据
维普
