基于定时收敛滑模的构网型光储系统改进自抗扰控制  

Improved active disturbance rejection control for grid type photovoltaic energy storage system based on fixed-time convergence sliding mode

作　　者：胡振洋 王嘉力 傅作超 刘月明 皇金锋[1] HU Zhenyang;WANG Jiali;FU Zuochao;LIU Yueming;HUANG Jinfeng(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723001,China;Xi'an Xingyuan Bo Rui New Energy Technology Co.,Ltd.,Xi'an 710000,China)

机构地区：[1]陕西理工大学电气工程学院,陕西汉中723001 [2]西安星源博锐新能源技术有限公司,陕西西安710000

出　　处：《电力工程技术》2025年第2期69-79,共11页Electric Power Engineering Technology

基　　金：陕西省自然科学基金资助项目(2023-JC-YB-442)。

摘　　要：随着大规模分布式发电设备逐步取代传统的同步发电机,并网系统面临着惯性缺失、电压和频率稳定性下降等一系列挑战。构网型控制技术的引入为分布式发电设备赋予了必要的惯性和频率支持能力。在构网控制技术领域,虚拟同步发电机技术虽已得到广泛应用,但其依赖的传统比例积分(proportional integral,PI)控制策略存在抗干扰能力弱、暂态稳定性不足等问题。针对这些不足,文中在构网型光储系统中提出了一种改进的滑模自抗扰控制策略,并将其应用于系统电压外环以提升系统性能。其中,分数阶扩张状态观测器的设计增强了系统对内部状态的观测能力,而所设计的定时收敛滑模控制器,凭借其能够定时收敛至平衡点的特性,有效抑制了传统滑模控制中的抖振现象,从而显著增强了系统的鲁棒性和抗干扰能力。最后,在MATLAB环境中构建仿真模型并进行实验验证,仿真与实验结果一致表明,文中提出的控制策略有效减少了系统的暂态电压波动,并加快了系统响应速度,对系统性能的改善起到了积极的作用。With the large-scale distributed generation equipment gradually replacing the traditional synchronous generator,gridconnected systems are faced with a series of challenges such as loss of inertia,voltage and frequency stability decline.The introduction of grid control technology gives the necessary inertia and frequency support capability to distributed generation equipment.In the field of grid control technology,virtual synchronous generator technology has been widely used,but the traditional proportional integral(PI)control strategy it relies on has some problems,such as weak anti-interference ability and insufficient transient stability.In view of these shortcomings,an improved sliding mode active disturbance rejection control strategy for grid type photovoltaic energy storage system is proposed,which applies to the outer voltage loop of the system to improve the system performance.Among them,the fraction order extended state observer is designed to enhance the observation ability of the internal state of the system,and the fixed-time convergence sliding mode controller is designed to effectively suppress the chattering phenomenon in the traditional sliding mode control by means of its characteristic of converging to the equilibrium point in a fixed time,thus significantly enhancing the robustness and anti-interference ability of the system.Finally,through the construction of simulation model in MATLAB environment and experimental verification,the simulation and experimental results show that the control strategy proposed in this paper effectively reduces the transient voltage fluctuations of the system and speeds up the system response speed,which plays a positive role in improving the system performance.

关 键 词：构网型光储系统 虚拟同步发电机 改进滑模自抗扰控制 分数阶 扩张状态观测器 定时收敛滑模 

分 类 号：TM46[电气工程—电器]