林焱,蔡振才,吴丹岳,刘建华.微电网孤岛模式下基于虚拟阻抗的负荷分配控制策略[J].电测与仪表,2016,53(9):. LIN yan,Cai Zhencai,WU Dan-yue,LIU Jian-hua.An Control Strategy of Load Distribution Based on Output Virtual Impedance in an Autonomous Microgrid[J].Electrical Measurement & Instrumentation,2016,53(9):.
微电网孤岛模式下基于虚拟阻抗的负荷分配控制策略
An Control Strategy of Load Distribution Based on Output Virtual Impedance in an Autonomous Microgrid
The performance of load distribution is critical for the stable and efficient in an autonomous microgrid with multi-inverter parallel system. Through in-depth analysis of the load distribution mechanism of multi-inverter parallel system, the conclusion that the mismatch of rated power with line impedance is the root cause of inaccurate distribution is got. On this basis, a method based on the introduction of virtual impedance is proposed to achieve the match of rated capacity of the inverter with the total output impedance, in order to achieve the purpose of improving the load distribution properties. At the same time, the droop characteristic curve is corrected to reduce the impact of virtual impedance on the output voltage. Finally, The effectiveness of the proposed control strategy is verified on the Matlab/Simulink simulation platform.
