For the future of high power electronics penetration,the stable operation of grid-forming inverters in the power system is crucial. Due to the high inertia and high damping generated by the mechanical rotor and damping winding of the traditional synchronous machine,the inverter may have obvious synchronous frequency resonance problems in the output power after grid connection due to the lack of inertia and damping and the negative damping introduced by coupling,which not only affects the waveform quality,but also leads to transient instability in serious cases.Four methods are proposed and analyzed for this problem,and finally the simulation verification is carried out by Matlab/Simulink.
关键词
构网型逆变器/虚拟同步机/同步频率谐振/稳定性
Key words
grid-forming inverter/virtual synchronous machine/synchronous frequency resonance/stability
维普
万方数据