PI控制策略在储能逆变器中的仿真研究

Simulation and research of PI control strategy in energy storage inverter

根据储能逆变器在储能及逆变工作状态下的拓扑结构及控制要求,提出在两种工作状态下的控制结构及控制方法。系统工作在逆变状态下时,采用PI电流单环控制。当系统工作在储能工作状态下时,选用PI电压电流双环控制,保证电压电流稳定。通过在MATLAB/Simulink仿真环境下构建系统模型及PI控制器模型,对储能和逆变两种工作状态下的几种情况分别完成仿真研究,验证了基于PI控制策略的优越性。结果证明,采用PI控制策略可使内环电流及外环电压快速且无超调地跟踪参考值,并且对电阻变化具有良好的鲁棒性能。

According to the topology and control requirement of energy storage inverter in energy storage and inverter condition,the control structure and control method in the two working condition were put forward.When the system was working in the inverter condition,the PI current single loop control was adopted in order to ensure voltage and current stable.While the system was working in the energy storage condition,the PI voltage current double loop control was adopted.By establishing system model and PI controller model in the MATLAB/Simulink simulation environment,the simulation and analysis were carried out on several conditions of two kinds of working states of the inverter and the stored energy,and the superiority of the PI control strategy was verified.The simulation results showed that the PI control strategy could make the inner loop current and outer loop voltage fast and without overshoot tracking reference value,and had good robustness to the change of the resistance.