基于多阶反馈重构的微电网端口变换器自抗扰策略  

Active disturbance rejection strategy of a microgrid port converter based on multi-order feedback reconstruction

作　　者：周雪松[1] 景亚楠 马幼捷[1] 王鑫[1] 陶珑 问虎龙 ZHOU Xuesong;JING Yanan;MA Youjie;WANG Xin;TAO Long;WEN Hulong(Tianjin Key Laboratory of New Energy Power Conversion,Transmission and Intelligent Control(Tianjin University of Technology),Tianjin 300384,China;Tianjin Ruineng Electric Co.,Ltd.,Tianjin 300385,China)

机构地区：[1]天津市新能源电力变换传输与智能控制重点实验室(天津理工大学),天津300384 [2]天津瑞能电气有限公司,天津300385

出　　处：《电力系统保护与控制》2024年第20期1-11,共11页Power System Protection and Control

基　　金：国家自然科学基金重点项目资助(U23B20142);国家自然科学基金面上项目资助(51877152);天津市研究生科研创新项目资助(2022SKY180)。

摘　　要：直流微电网低压负载侧电能稳定供应是新型电力系统中新能源有效消纳的重要保障。针对微电网供能枢纽变换器受扰情况下输出不稳定的问题,提出了一种观测器状态变量重构补偿的改进型自抗扰策略。首先,通过剖析自抗扰框架下无法避免的结构问题,推导出观测误差精准范式,并对扰动观测变量进行重构补偿,实现对总扰动的快速跟踪和消除。然后,进一步对改进策略在稳定性能、跟踪性能、抗扰性能、鲁棒性能4个维度进行理论分析,验证了该策略的正确性与有效性。最后,利用数字仿真和物理实验模拟实际工况进行对比分析,验证了该策略在微电网系统多种内外不确定扰动下均具有较好的动态性能。Stable supply of electrical energy on the low-voltage load side of a DC microgrid is an important guarantee for the effective consumption of new energy in the new power system.To solve the problem of unstable output of the microgrid energy supply hub converter when there is disturbance,an improved active disturbance rejection(ADR)strategy for observer state variable reconstruction compensation is proposed.First,by analyzing the unavoidable structural problems in the ADR framework,an accurate paradigm of observation error is derived,and the disturbance observation variables are reconstructed and compensated to achieve fast tracking and elimination of the total disturbance.Then,the correctness and effectiveness of the improved strategy are verified by theoretical analysis of the four dimensions of stability,tracking,anti-interference and robustness performance.Finally,actual working conditions simulated by digital simulation and physical experiments are used for comparative analysis.These verify that the strategy has good dynamic performance when there is a variety of internal and external uncertain disturbances in the microgrid system.

关 键 词：直流微电网 端口变换器 自抗扰控制 扩张状态观测器 观测量补偿 

分 类 号：TM46[电气工程—电器]