采用新型MPC提高储能PCS虚拟同步机控制稳定性研究  

Research on using new MPC to improve control stability of energy storage PCS virtual synchronous machine

作　　者：侯龙 王玉爽[1] 杨沛豪 Hou Long;Wang Yushuang;Yang Peihao(Information Engineering College of Henan Agricultural Vocational College,Zhengzhou 451450,China;Xi’an Thermal Power Rescarch Institute Co.,Ltd.,Xi an 710054,China)

机构地区：[1]河南农业职业学院信息工程学院,郑州451450 [2]西安热工研究院有限公司,西安710054

出　　处：《国外电子测量技术》2022年第7期82-88,共7页Foreign Electronic Measurement Technology

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

摘　　要：为了提升采用电压型换流器(PCS)的储能系统对电网频率支撑能力,采用模仿同步发电机特性的虚拟同步机(virtual synchronous generation, VSG)控制,实现储能系统对电网的虚拟惯性、阻尼支撑。针对传统VSG控制在功率调节过程中出现的频率偏差、功率振荡问题,提出一种采用功率模型预测控制(model predictive control, MPC)提高VSG稳定性的方法,采用MPC不断修正VSG功率参考值。为了加快MPC功率响应速度,提出两步MPC频率偏差功率约束函数,实现储能PCS稳态控制,为了验证采用MPC及VSG协调控制的储能电压型PCS控制系统稳定性,构建储能系统并网运行小信号模型。将上述控制策略通过MATLAB/Simulink仿真,验证方案可以有效提高储能PCS虚拟同步机控制系统稳定性。In order to improve the frequency support ability of the energy storage system with voltage source converter(PCS),the virtual synchronous generation(VSG)control is adopted to realize the virtual inertia and damping support of the energy storage system to the power grid.Aiming at the problems of frequency deviation and power oscillation in traditional VSG control,this paper proposes a method to improve the stability of VSG by using power model predictive control(MPC),and uses MPC to continuously modify the power reference value of VSG.Furthermore,in order to speed up the power response speed of MPC,a two-step MPC frequency deviation power constraint function is proposed to realize the steady-state control of energy storage PCS.in order to verify the stability of the energy storage voltage type PCS control system with MPC and VSG coordinated control,a small signal mode of grid connected operation of energy storage system is constructed.The above control strategy is simulated by MATLAB/Simulink to verify that the proposed scheme can effectively improve the stability of energy storage PCS virtual synchronous machine control system.

关 键 词：储能系统 电压型换流器 虚拟同步机 功率模型预测控制 频率偏差功率约束函数 小信号模型 

分 类 号：TM273[一般工业技术—材料科学与工程]