基于改进滑模的高压直挂式构网型储能控制策略  

Grid Forming Control Strategy Based on Improved SMC for Modular Cascade High-voltage Direct-mounted Energy Storage

作　　者：徐志洋 陈来军[1,2] 苏小玲 赵正奎 杨军 许德操 XU Zhiyang;CHEN Laijun;SU Xiaoling;ZHAO Zhengkui;YANG Jun;XU Decao(Key Laboratory of Smart operation of New Energy Power System(Qinghai University),Ministry of Education,Xining 810016,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;State Grid Qinghai Electric Power Company Electric Power Scientific Research Institute,Xining 10001,China;National Energy Group Qinghai Electric Power Co.,Ltd.,Xining 810002,China)

机构地区：[1]青海大学新能源电力系统智慧运行教育部重点实验室,西宁810016 [2]清华大学电机工程与应用电子技术系,北京100084 [3]国网青海省电力公司电力科学研究院,西宁810001 [4]国家能源集团青海电力有限公司,西宁810002

出　　处：《电力电容器与无功补偿》2025年第2期53-61,共9页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金(52167022)。

摘　　要：高压直挂式构网型储能是解决新能源电力系统电压频率问题的关键设备。大扰动工况下电网电压频率快速变化,要求快速支撑和抗扰动能力。本文首先基于高压直挂式储能拓扑建立了大扰动工况下的数学模型。在此基础上,提出了基于滑模控制的高压直挂式构网型储能控制策略,通过改进滑模面及趋近律函数解决抖振问题。并提出了基于幂次函数的滑模控制律。最后,建立李雅普洛夫函数证明改进滑模构网控制策略满足稳定条件。仿真结果表明,与采用比例积分控制器的构网型控制系统相比,模块化级联高压直挂式构网型储能系统采用基于改进滑模控制具备更强的抗干扰能力和电压支撑效果。High-voltage direct-mounted grid-forming energy storage is a key device for solving voltage and frequencyinnewenergypowersystems.Underlargedisturbanceconditions,therapidchangesingridvoltage and frequency require rapid support and disturbance rejection capabilities.In this paper,a mathematical model for high-voltage direct-mounted energy storage under large disturbance conditions based on its topology is set up firstly.On this basis,a control strategy for high-voltage direct-hung grid-forming energy storage based on sliding mode control is proposed,which addresses the chattering problem by improving the sliding surface and the reaching law function.Additionally,a sliding mode control based on a power function is proposed.Finally,a Lyapunov function is set up to prove that the improved sliding mode grid-forming control strategy meets the stability conditions.The simulation results show that compared with the grid-forming control system using a proportional-integral controller,the modular cascaded high-voltage direct-mounted grid-forming energy storage system using the improved sliding mode control has stronger disturbance resistance capabilities and voltage support effects.

关 键 词：构网型储能 高压直挂式储能 李雅普洛夫函数 滑模控制 高抗扰 电压支撑 

分 类 号：TM91[电气工程—电力电子与电力传动]