The integrated control of frequency transient stability of multi-microinverter microgrid is studied,which can effectively control the frequency transient stability of microgrid,improve the control accuracy,and shorten the regu-lation time.By means of excitation control and power frequency control,a virtual synchronous generator(VSG)control method is constructed to realize the frequency transient stability control of microgrid under a small load disturbance.The im-proved droop control method is used to realize the frequency transient stability control of microgrid under a large load disturbance.By designing a synchronous voltage controller and a double-loop controller,the free switch between the VSG control method and the improved droop control method is completed,and the transient stability of microgrid fre-quency under different conditions is controlled comprehensively.Experimental results show that the proposed method can effectively control the frequency transient stability of microgrid under different load disturbances.When switching between the off-grid and grid-connected modes,the control methods are effectively switched,the frequency transient sta-bility of microgrid is accurately controlled,and the regulation time is shortened.
关键词
多微型逆变器/微电网/频率/暂态稳定/综合控制/虚拟同步发电机/改进下垂控制
Key words
Multi-microinverter/microgrid/frequency/transient stability/integrated control/virtual synchronous generator(VSG)/improved droop control
维普
万方数据