说明：  在大连线阻抗环境下，通过常规虚拟阻抗策略来调整逆变器的输出阻抗，将加剧逆变器输出电流在线路阻抗上的电压降落，恶化非线性负荷条件下微电网的母线电压质量且难以实现良好的均流控制。
(In the large feeder impedance environment, adjusting the output impedance of inverter by conventional virtual impedance strategy will increase voltage drop on feeder impedance, worsen power quality of microgrid under the nonlinear load conditions and make good current-sharing control difficult.)