基于萤火虫优化算法的不平衡网压下VSR自抗扰控制

doi:10.16180/j.cnki.issn1007-7820.2022.01.012

Abstract

Abstract:

Under the traditional control mode, the grid-side current harmonics of three-phase VSR are large when the grid voltage is unbalanced, and its dynamic performance is easily affected by load disturbance. In view of this problem, an active disturbance rejection control strategy based on firefly optimization algorithm is proposed. The active disturbance rejection controller which is not related to the object model is added to the inner current loop of the system to perform closed-loop control to initiatively compensate and restrain the internal and external isturbances of the system in time. At the same time, the firefly optimization algorithm is adopted to optimize the key parameters of the ADRC. The algorithm has a faster convergence speed while searching for the optimal value of the objective function globally, which improves the control performance of the system. The simulation results show that compared with the traditional control method, the total harmonic distortion rate of the grid-side current is reduced by 3.67% and the anti-load disturbance ability of the rectifier is effectively improved, which verifies the correctness and effectiveness of the control strategy.

Key words: three-phase VSR, unbalanced grid voltage, ADRC, FA, global search, parameter tuning, THD, load disturbance

CLC Number:

TP18

YAO Qiang,ZENG Guohui,HUANG Bo,LIU Jin,WEI Yu. Active Disturbance Rejection Control of VSR under Unbalanced Grid Voltage Based on Firefly Optimization Algorithm[J].Electronic Science and Technology, 2022, 35(1): 73-79.

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Active Disturbance Rejection Control of VSR under Unbalanced Grid Voltage Based on Firefly Optimization Algorithm

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