储能系统网侧变流器改进预测直接功率控制方法  

Improved Predictive Direct Power Control Method for Grid-side Converter of Energy Storage System

作　　者：余洋 陈启维 贾浩 权丽 米增强 陈颖 YU Yang;CHEN Qiwei;JIA Hao;QUAN Li;MI Zengqiang;CHEN Ying(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Baoding 071003,China;Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province,North China Electric Power University,Baoding 071003,China;Rocket Force Command College of PLA,Wuhan 430012,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学(保定)),河北保定071003 [2]河北省分布式储能与微网重点实验室(华北电力大学(保定)),河北保定071003 [3]火箭军指挥学院,湖北武汉430012

出　　处：《电力科学与工程》2021年第5期1-8,共8页Electric Power Science and Engineering

基　　金：国家重点研发计划(2018YFE0122200);国家自然科学基金(52077078);河北省自然科学基金(E2019502163)。

摘　　要：网侧变流器是储能系统并网和实现能量双向流动的核心部件,现有的预测直接功率控制方法存在计算量大、寻优过程复杂的问题。提出了网侧变流器改进预测直接功率控制方法:根据网侧变流器微分方程离散化表达式,构建了功率状态量的预测模型;以追踪参考功率为目标,利用李雅普诺夫函数直接反推求得变流器参考输出电压矢量;通过判断输出电压矢量所在扇区,快速选出最终的开关控制量。该方法减少了计算量,简化了寻优过程,还保证了控制系统的稳定性。仿真结果表明,改进方法能够实现有功、无功的解耦控制和快速响应,具有良好的控制效果。Grid-side converter is the core component of grid-connected energy storage system and bidirectional energy flow.Its existing predictive direct power control method has the problems of large calculation amount and complicated optimization process.An improved predictive direct power control method for the grid-side converter was proposed:according to the discretization expression of the differential equation of the grid-side converter,the predictive model of its power state variable was constructed;with the goal of tracking the reference power,the output voltage reference vector of the converter was obtained by directly using Lyapunov function,and the final switch control vector was quickly selected by judging the sector of the output voltage vector.This method reduces the amount of calculation,simplifies the optimization process,and also ensures the stability of the control system.Simulation results show that the improved method can decouple the control of active power and reactive power,achieve the fast response,and have a good control performance.

关 键 词：模型预测控制 直接功率控制 李雅普诺夫函数 网侧变流器 空间电压矢量 

分 类 号：TM46[电气工程—电器]