Voltage Coordination Control Strategy of Photovoltaic Storage DC Microgrid Based on improved Linear Ac‍tive Disturbance Rejection

doi:10.3969/j.issn.1008-0198.2026.02.011

Abstract

Abstract: in order to solve the problem of bus voltage oscillation caused by the fluctuation of light intensity and load abrupt change in photovoltaic storage DC microgrid, an iLADRC strategy is proposed. In this paper, a series correction link is added to the traditional improved linear active disturbance rejection control, and the observation accuracy of the extended state observer is improved by eliminating the steady-state error of the dilated state observer. Secondly, the feedforward active disturbance rejection control is introduced into the voltage outer loop control, and a positive feedback channel is drawn from the voltage outer loop to compensate the reference current output of the voltage outer loop, so as to realize the error-free tracking of the signal, improve the control performance and response speed of the hybrid energy storage control system, and reduce the overshoot and adjustment time of the DC bus voltage. finally, the simulation model of DC microgrid is built by MATLAB, and the results show that the overshoot of the improved linear active disturbance rejection control is smaller and the stabilization time is shorter, which proves the effectiveness of the control strategy proposed in this paper.

Key words: DC microgrid, coordinated control, linear active disturbance rejection control, hybrid energy storage

CLC Number:

TM712.2

Li Shengqing, TONG Kaixin, ZENG Jinhui, WANG Xiangdong, ZHAO Mengdi. Voltage Coordination Control Strategy of Photovoltaic Storage DC Microgrid Based on improved Linear Ac‍tive Disturbance Rejection[J]. Hunan Electric Power, 2026, 46(2): 84-92.

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