分布式发电系统多逆变器协调控制策略

The multi-inverter coordinated control strategy of distributed generation

针对分布式发电系统中多种逆变器在运行模式切换时,控制策略做相应的改变以实现平滑切换的问题,提出了一种基于间接电流控制的多变流器协调控制策略。主逆变器采用V/f或者PQ控制,从逆变器采用PQ控制。通过引入协调控制环节,在实现主逆变器V/f控制和PQ控制无缝切换的同时,省去了孤岛检测环节。建立了基于上述控制策略的分布式发电系统数学模型,仿真结果验证了所提控制策略的正确性。

For a variety of distributed power generation system inverter when it is running mode switching, we make the appropriate changes for control strategies in order to achieve a smooth handover of the problem. And we propose a varied inverter coordinated control strategy which is based on indirect current-controlled. Main inverter adopts V/f control or PQ, the PQ control is used from the inverter. By introducing coordinated control link, while achieving the main inverter V/f control and PQ control seamless switching. We save the island detection step. We establish a mathematical model of distributed power generation system based on the control strategy. Then,simulation results verify the validity of the proposed control strategy.