基于滑模一致性的多并联互联变流器分布式鲁棒功率控制策略  

Distributed Robust Power Control Strategy for Parallel Interlinking Converters Based on Sliding Mode Consistency

作　　者：李鹏宇 郑涛[1] 杨畅 卜鸣 代钰欣 鲁晓毅 LI Pengyu;ZHENG Tao;YANG Chang;BU Ming;DAI Yuxin;LU Xiaoyi(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi Province,China)

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《电网技术》2024年第12期5079-5088,I0061,共11页Power System Technology

基　　金：国家自然科学基金企业创新发展联合基金重点支持项目(U23B20112);陕西省自然科学基金(2024JC-YBMS-420)。

摘　　要：针对现有交直流混合微电网分布式控制策略未充分考虑多并联互联变流器(interlinking converter,IC)场景、通信拓扑结构复杂、易受通信干扰以及运行工况变化等内外扰动影响等问题,该文提出了基于滑模一致性的多并联IC分布式鲁棒功率控制策略,通过系统期望的动态特性以及滑动模态设计分布式滑模控制器,确保多并联IC的传输功率于有限时间收敛至一致性目标稳态值,并通过理论分析证明了其在未知扰动下的稳定性以及有限时间收敛性能。该策略能够降低滑模增益系数,抑制滑模控制的抖振现象,并实现对未知干扰的动态补偿,确保多并联IC传输功率协调控制以及高精度分配。仿真算例验证了所提控制策略的可行性与有效性。To solve the problems that the existing distributed control strategy of hybrid AC/DC microgrid does not fully consider the scenario of multiple parallel interlinking converters(ICs),the communication topology is complicated,and the controller is vulnerable to internal and external disturbances such as communication disturbance and operating condition changes,this paper proposes a distributed robust power control strategy for multiple parallel ICs based on sliding mode consistency.The distributed sliding mode controller is designed based on the expected dynamic characteristics and sliding modes of the system to ensure that the transmission power of multiple parallel ICs converges to the consistent target steady-state value in finite time and its stability under unknown disturbances and finite time convergence performance are proved through theoretical analysis.The proposed strategy reduces the sliding mode gain coefficient,suppresses the chattering phenomenon of sliding mode control,and achieves dynamic compensation for unknown disturbance so as to ensure coordinated control and high-precision distribution of transmission power of multiple parallel ICs.Simulation examples illustrate the feasibility and effectiveness of the proposed control strategy.

关 键 词：交直流混合微电网 多并联互联变流器 分布式滑模控制 功率协调控制 干扰补偿 

分 类 号：TM721[电气工程—电力系统及自动化]