摘要
提出了一种微电网逆变器多环反馈鲁棒控制方法。采取增加积分器和电压闭环改进功率环下垂控制器,通过在电压外环建立阻性虚拟阻抗提高逆变器输出功率分配的精度和可控性,电流内环采用鲁棒预测无差拍控制等方法,增强系统的鲁棒性,降低感性线路阻抗对功率分配和谐波的影响,减少控制延时和电感量偏差对并网电流造成的畸变。仿真结果证明了所提控制方法的有效性和鲁棒性。
An improved multi-loop feedback method is proposed. The power loop is updated by adding an integrator and voltage in a closed-loop. A simple resistance equivalent output impendence controller and a robust predictive deadbeat grid-connected control method are proposed. The proposed robust predictive deadbeat control is adapted to enhance the system robustness and, reduce the impact of power harmonic due to line impendence and decrease the current distortion due to the control delay and inductance deviation. Simulation results verified the validity of the proposed control method.
出处
《供用电》
2013年第2期8-15,共8页
Distribution & Utilization
关键词
微电网
功率控制
无差拍控制
电压电流环
Micro-grid
Power control
Deadbeat control
Voltage-current loop
