基于前馈自抗扰控制方法的蓄电池储能控制策略

针对光储微电网系统中蓄电池储能存在抗干扰能力较弱、直流母线电压波动较大、充放电有效性差等问题,提出了基于前馈线性自抗扰控制(FF-LADRC)方法的蓄电池储能控制策略。建立双向DC-DC变换器数学模型,并在传统蓄电池双闭环储能控制的研究基础上,通过在电压环和电流环中分别引入LADRC,并且在电压环中加入前馈控制,从而完善了双闭环控制策略,以实现对蓄电池储能系统中充放电过程进行有效控制。仿真结果表明,所提基于FF-LADRC方法的蓄电池储能控制策略能够抑制直流母线电压波动,并且有效提高蓄电池储能系统的充放电性能和降低储能系统超调量。

Battery Energy Storage Control Strategy Based on Feedforward Active Disturbance Rejection Control Method

In photovoltaic storage microgrid system, anti interference ability of battery energy storage is weak, DC bus voltage fluctuation is large, and charging and discharging efficiency is poor. In order to solve these problems, a battery energy storage control strategy based on feedforward linear active disturbance rejection control method (FF-LADRC) is proposed. A mathematical model of bi directional DC DC converter is established. Based on the traditional closed loop energy storage control of a battery, by introducing LADRC into the voltage loop and the current loop respectively, and adding a feedforward control in the voltage loop, the double closed loop control strategy is improved. Thereby the charging and discharging process in the battery energy storage system is controlled effectively. Simulation results show that the proposed control method can suppress the DC bus voltage fluctuation, and improve the charging and discharging performance of the battery energy storage system and reduce the overshoot of the energy storage system effectively.