摘要
光伏混合储能变流器(PV-HPCS)的传统线性控制策略在功率及电压波动抑制方面难以达到理想控制效果.为了提升光伏混合储能变流器的性能,平抑电网功率波动,维持母线电压稳定,基于虚拟同步发电机(VSG)技术,提出基于拟连续算法的改进滑模自抗扰控制策略. VSG与电压电流双闭环策略相配合.在电压外环采用PI控制,为电流内环提供参考值;在电流内环采用高阶超螺旋滑模观测器(HO-STSMO),实现更优的响应速度与跟踪精度.采用双滑模切换控制律形式,引入拟连续积分终端滑模控制器(QC-ITSMC),并设计改进指数趋近律,以平滑系统控制信号,提升系统鲁棒性.搭建仿真模型和实验平台.实验结果表明,改进控制策略有效抑制了电网功率波动,提高了系统运行稳定性.
An improved sliding mode active disturbance rejection control strategy based on the quasi-continuous algorithm was proposed by utilizing the virtual synchronous generator(VSG)technology to address the issue that the traditional linear control strategy of photovoltaic hybrid power conversion system(PV-HPCS)was difficult to achieve ideal control effect in terms of power and voltage fluctuation suppression,and to improve the performance of PVHPCS,to stabilize the power fluctuation of the grid and maintain the stability of bus voltage.The VSG was integrated with the dual closed-loop control strategy of voltage and current.The PI control was adopted in the voltage outer loop to provide reference values for the current inner loop.A high-order super-twisting sliding mode observer(HO-STSMO)which realized higher response speed and tracking accuracy was adopted in the current inner loop.The quasicontinuous integral terminal sliding mode controller(QC-ITSMC)was introduced in the form of dual sliding mode switching control law,and an improved exponential reaching law was designed to smooth the system control signal and improve the robustness of the system.The simulation model and experimental platform were built,and the experimental results showed that the improved control strategy effectively suppressed the power fluctuation of the grid and improved the stability of the system.
作者
刘月明
皇金锋
胡振洋
薛瑞泽
李星
LIU Yueming;HUANG Jinfeng;HU Zhenyang;XUE Ruize;LI Xing(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723001,China)
出处
《浙江大学学报(工学版)》
北大核心
2026年第1期158-168,共11页
Journal of Zhejiang University(Engineering Science)
基金
陕西省自然科学研究资助项目(2023-JC-YB-442)
陕西理工大学研究生创新基金资助项目(SLGYCX2539)。
关键词
光伏混合储能变流器
虚拟同步发电机
高阶超螺旋滑模观测器
拟连续算法
指数趋近律
photovoltaic hybrid power conversion system
virtual synchronous generator
high-order supertwisting sliding mode observer
quasi-continuous algorithm
exponential reaching law
