基于混合储能的光储直流微网改进型滑模自抗扰控制  

Improved sliding mode self-disturbance resistance control of an optical storage DC micro-grid based on hybrid energy storage

作　　者：皇金锋[1] 杨振宇 李帅杰 HUANG Jinfeng;YANG Zhenyu;LI Shuaijie(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723001,China)

机构地区：[1]陕西理工大学电气工程学院,陕西汉中723001

出　　处：《电力系统保护与控制》2023年第23期151-159,共9页Power System Protection and Control

基　　金：陕西省自然科学研究项目资助(2023-JC-YB-442)。

摘　　要：针对光储直流微网混合储能系统在光伏输出波动、负荷波动等大扰动下导致的母线电压稳定性差和系统响应速度慢等问题,提出一种兼顾母线电压稳定和响应速度的改进型滑模自抗扰控制策略。首先,针对一级观测器扰动估计能力有限问题,引入第二级观测器进行观测补偿,并将级联观测器对总扰动的估计值反馈到控制器进行消除。其次,针对原有的非线性控制器响应速度慢、鲁棒性差等问题,设计非奇异快速终端滑模控制进行优化,利用混合储能单元特性,分别补偿高低频分量,来提高系统的响应速度;并根据巴尔巴辛定理以及李雅普诺夫准则证明了所设计控制器的稳定性。最后,基于Matlab仿真平台与其他控制策略进行仿真对比,仿真结果验证了所提策略的有效性。To address the problems of poor bus voltage stability and slow system response when there are large disturbances such as PV output and load fluctuations in the optical storage DC micro-grid hybrid energy storage system,an improved sliding mode self-anti-disturbance control strategy that balances bus voltage stability and response speed is proposed.First,to address the problem of limited disturbance estimation capability of the first-stage observer,a second-stage observer is introduced for observation compensation,and the estimated value of the total disturbance from the cascaded observer is fed back to the controller for elimination.Second,to address the problems of slow response speed and poor robustness of the original non-linear controller,a non-singular fast terminal sliding mode control is designed for optimization,and the hybrid energy storage unit characteristics are used to compensate for the high and low frequency components to improve the system response speed.The stability of the designed controller is proved by Balbasin’s theorem and Liapunov’s criterion.Finally,the simulation is compared with other control strategies based on the Matlab simulation platform,and the simulation results verify the effectiveness of the proposed strategy.

关 键 词：光储直流微网 混合储能 级联观测器 滑模自抗扰控制 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM615