Due to the unmatched line impedance among distributed generators in the low-voltage micro-grid,reasonable distributing active power according to droop gain is difficult by using the traditional droop control.Therefore,an adaptive virtual resistance-based droop control method without communication was proposed.By transmitting the active power and voltage output by each DG unit in the micro-grid to the a-daptive virtual resistance controller,the power can be accurately distributed according to the inverter ca-pacity ratio on the premise of ensuring the stable control of voltage and frequency.Small signal stability of the microgrid inverter was analyzed to optimize the control parameters of the controller.Simulation and experimental results verify effectiveness of the proposed control method.
关键词
微电网/分布式发电/下垂控制/自适应虚拟电阻/有功功率分配/环流抑制/小信号模型
Key words
microgrid/distributed power generation/droop control/adaptive virtual resistance/active power sharing/circulating current suppression/small-signal model
维普
万方数据