采用改进MPC提高储能系统电压暂态特性研究  

Research on Improving Voltage Transient Characteristics of Energy Storage System with Improved MPC

作　　者：鲍建[1] 杨沛豪 BAO Jian;YANG Peihao(Intelligent Manufacturing College,Shandong Polytechnic,Jinan 250104,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]山东职业学院智能制造学院,济南250104 [2]西安热工研究院有限公司,西安710054

出　　处：《电源学报》2024年第2期242-249,共8页Journal of Power Supply

基　　金：国家重点研发计划“973”资助项目(2017YFBO902102)。

摘　　要：储能系统通过换流器实现并网运行,常规换流器因为其开关频率低,在采样、计算环节存在延时导致储能系统暂态特性差,甚至引起整个电网不稳定。本文采用模型预测控制MPC(model predictive control)来实现储能系统功率快速响应,避免延时影响。引入功率权重价值函数在有功、无功MPC控制中,计算储能换流器输出电压最优值。针对因为滤波电感参数偏移导致的MPC模型不准确问题,本文采用电感误差补偿控制来提高模型精度。通过Matlab/Simulink仿真和实验来验证本文所提方案可提高储能系统暂态特性,有效消除误差对MPC控制性能的影响。The grid-connected operation of an energy storage system is realized by a converter.Due to the low switching frequency of the conventional converter,there exists time delay in sampling and calculation,which will lead to poor transient characteristics of the energy storage system and even instability of the whole power grid.In this paper,model predictive control(MPC)is used to achieve a fast power response of energy storage system and avoid the influence of time delay.A power weight value function is introduced to calculate the optimal output voltage of energy storage converter in the MPC control of active and reactive power.To solve the problem of inaccurate MPC model caused by the parameter deviation of filter inductor,inductance error compensation control is used to improve the model accuracy.Through Matlab/Simulink simulations and experimental results,it is verified that the proposed scheme can improve the transient characteristics of energy storage system and effectively eliminate the influence of error on the MPC control performance.

关 键 词：储能系统 暂态特性 模型预测控制 功率权重价值函数 电感误差电压补偿 

分 类 号：TM933[电气工程—电力电子与电力传动]