基于准PR控制的锂电池储能并网系统功率控制  

Power control of lithium battery energy storage grid-connected system based on quasi-PR control

作　　者：刘聪 李立生 刘洋 王永亮 Liu Cong;Li Lisheng;Liu Yang;Wang Yongliang(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,Shandong,China;Electric Power Research Institute of State Grid Shandong Electric Power Co.,Ltd.,Ji′nan 250002,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]国网山东省电力公司电力科学研究院,济南250002

出　　处：《电测与仪表》2021年第8期172-178,共7页Electrical Measurement & Instrumentation

基　　金：国网山东省电力公司科技项目(520626190049)。

摘　　要：传统PQ控制下的锂电池储能系统需引入直流解耦分量,导致并网电能质量动态功率补偿性能受到影响,且控制结构较复杂。文章提出准比例谐振(PR)控制的锂电池储能并网系统的直接功率控制策略。该策略无需内环解耦,省去了锁相环的使用,简化了传统PQ控制的结构,彻底避免了控制系统内环直流解耦分量对控制系统的影响,实现了对交流量的无静差跟踪,使并网电能质量和功率动态响应速度有一定的提高。此外,提出一种全新的参数整定方法对准PR控制器的参数进行设计,以保证控制系统的稳定性和可靠性。构建改进后的锂电池储能并网系统仿真模型,验证了所设计并网系统的可行性和有效性。The lithium battery energy storage system by the traditional PQ control is affected by the DC decoupling component,which results in the influence of dynamic power compensation performance of grid-connected power quality,and the control structure is more complex.This paper proposes the direct power control strategy of lithium battery energy storage and grid-connected system based on quasi-PR controller.This strategy eliminates the need to introduce decoupling components into the control inner loop,eliminates the use of PLL,and simplifies the traditional PQ control algorithm,thus avoiding the influence of the inner-loop DC decoupling component of the control system,which achieves the zero steady-state error tracking of AC,and improves the grid-connected power quality and response speed of power.Moreover,a novel tuning method is proposed to design the quasi-PR controller to ensure the stability and reliability of the control system.Finally,the improved lithium battery energy storage grid-connected system simulation model is constructed to verify the feasibility and effectiveness of the designed grid-connected system.

关 键 词：锂电池 直接功率控制 准PR控制器 αβ坐标系 参数整定 

分 类 号：TM911[电气工程—电力电子与电力传动] TM46