电力系统保护与控制2024，Vol.52Issue(4)：121-132,12.DOI:10.19783/j.cnki.pspc.230644
基于级联型扩张状态观测器的直流微电网低压负载接口变换器自抗扰稳压研究
Active disturbance rejection and voltage regulation of a DC microgrid low voltage load interface converter based on a cascaded extended state observer
摘要
Abstract
The stability of load side voltage supply in a DC microgrid is an important prerequisite to achieving a high level of new energy power consumption.To maintain the voltage stability of the low-voltage load side,the cascaded extended state observer is used to improve the estimation accuracy and speed of disturbance reconstruction.Second-order ADRC technology is introduced into the low-voltage side voltage regulation control.First,the system design of voltage regulation control strategy is realized based on a dynamic model of a low-voltage interface converter considering the existence of disturbance.Then,the improvement effect of the cascaded extended state observer on the disturbance reconstructed accuracy is analyzed in the time domain,and the total disturbance suppression performance of the system is analyzed in the complex frequency domain by using the linear equivalent framework.The influence of system model uncertainty on the dynamic performance is analyzed.In addition,Lyapunov theory is used to analyze the stability of the proposed voltage regulation control strategy.The analysis shows that the system is stable in engineering terms.Finally,the simulation results verify the correctness and effectiveness of the proposed voltage regulation strategy,and it has good resilience to the disturbance.关键词
直流微电网/低压接口变换器/扩张状态观测器/线性自抗扰控制/Lyapunov理论Key words
DC microgrid/low-voltage interface converter/extended state observer/linear active disturbance rejection control/Lyapunov theory引用本文复制引用
马幼捷,杨清,周雪松,王博,王福森,王馨悦..基于级联型扩张状态观测器的直流微电网低压负载接口变换器自抗扰稳压研究[J].电力系统保护与控制,2024,52(4):121-132,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.51877152). 国家自然科学基金项目资助(51877152) （No.51877152）
天津市研究生科研创新项目资助(2022SKY180) （2022SKY180）
天津理工大学校级研究生科研创新实践项目资助(YJ2225) （YJ2225）
