引入空载电压增益补偿的微网非同型逆变器协同控制

通过特性分析,提出非同型逆变器存在空载电压增益和等效输出阻抗的失配问题.推导阻性下垂控制下非同型逆变器并联的功率均分条件,进而提出一种引入空载电压增益补偿的改进下垂控制策略和虚拟阻抗法,提高非同型逆变器空载电压增益和等效输出阻抗的匹配程度.仿真结果表明:在非同型逆变器协同控制中,文中方法能够有效地提高系统的功率均分性能.

Cooperative Control of Microgrid Non-Identical Inverters by Introducing No-Load Voltage Gain Compensation

Through characteristics analysis, the mismatch problem between no-load voltage gain and equivalent output impedance of non-identical inverters is proposed. The power equal sharing conditions of paralleled non-identical inverters under resistive droop control are derived, furthermore, an improved droop control strategy and virtual impedance method is proposed by introducing no-load voltage gain compensation to enhance the matching degree of no-load voltage gain and equivalent output impedance of non-identical inverters. The simulation results show that the proposed method can effectively improve the power equal sharing performance of the system in the cooperative control of non-identical inverters.