Improvement of primary frequency control by inertial responserncoordination between wind and conventional power plants

摘要

The constant increasing of wind power penetration leads to more and more retirement of conventionalrnpower generators. Since modern wind energy conversion machines are decoupled from the grid by thernback-to-back voltage-based converters, they are not able to contribute to inertial response. Therefore, thernreduced inertia of power systems at a high wind-power penetration level causes the greater rate of changernof frequency following a power imbalance event and may bring the system to the crucial stability situation.rnIn this study, the supported inertial response from the variable-speed wind turbines is based on electricallyrnvoltage-based converter control taken from stored kinetic energy of rotating mass of wind turbines. Tornenhance the frequency response, we proposed a new inertial coordination control between controlled windrnturbines and conventional generators. So as to investigate the performance of the proposed method, wernintroduced a new primary frequency response metric. Also, a comparison between the effects ofrntemporarily inertial support from wind farms and coordination of inertial support between wind andrnconventional power plants is done. The simulation results on an updated version of IEEE-39 bus power system in the presence of high penetration of wind farms indicate that by using the coordination controlrnscheme, the frequency performance is significantly improved. The simulation is performed by MATLABrnSimPowerSystems block set.