基于改进FCS-MPC的储能系统控制策略  

Control strategy of energy storage system based on improved FCS-MPC

作　　者：张万家 赵耀 陈永江 ZHANG Wanjia;ZHAO Yao;CHEN Yongjiang(College of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学电气工程学院,上海200090

出　　处：《电力科学与技术学报》2025年第1期221-229,共9页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51977128);上海市自然科学基金(21ZR1425400);上海市青年科技启明星计划(21QC1400200)。

摘　　要：当微电网负荷功率发生波动时,储能系统能够通过控制逆变器维持系统电压频率稳定。储能逆变器通常采用PI双闭环控制策略,但是由于PI控制存在滞后性,导致系统动态响应速度慢。为此,提出一种考虑Lyapunov稳定约束的有限集模型预测控制(finite control set-model predictive control,FCS-MPC)策略。首先,通过Lyapunov稳定约束实现对主控制目标电容电压的稳定控制,再根据电容电压总谐波失真约束项的轻重设置权重系数;然后,通过使目标函数最小实现协同控制,解决传统FCS-MPC目标函数耦合导致系统不稳定以及权重系数难以整定的问题,将改进后的FCS-MPC方法和下垂控制相结合控制储能逆变器;最后,在MATLAB和RT-LAB平台上进行仿真验证。仿真结果表明:与传统控制策略相比,改进后的FCS-MPC方法可以提高系统动态响应速度,实现多目标协同控制并且对权重系数有很好的鲁棒性。When the load power of a microgrid fluctuates,the energy storage system can maintain the stability of the system voltage and frequency by controlling the inverter.Energy storage inverters commonly adopt a double closed-loop control strategy with PI algorithm,but due to the lag of PI control,the dynamic response speed of the system is slow.To address this issue,a finite control set-model predictive control(FCS-MPC)strategy considering Lyapunov stability constraints is proposed.Firstly,the main control objective which is the stable control of the capacitor voltage,is achieved through Lyapunov stability constraints,and weight coefficients are set based on the severity of the total harmonic distortion constraint term of the capacitor voltage.Then,collaborative control is achieved by minimizing the objective function,solving the problems of system instability caused by the coupling of traditional FCS-MPC objective functions and difficulty in tuning weight coefficients.The improved FCS-MPC scheme is combined with droop control to control the energy storage inverter.Finally,simulation verification is performed on the MATLAB and RT-LAB platforms.Simulation results show that compared with traditional control strategies,this approach can improve the dynamic response speed of the system,achieve multi-objective collaborative control,and exhibit good robustness to weight coefficients.

关 键 词：储能系统 有限控制集 多约束 动态响应速度 逆变器 

分 类 号：TM73[电气工程—电力系统及自动化]