To address the issue of deteriorating power quality in photovoltaic microgrid demand-side converters caused by complex uncertain disturbances
a corrective active disturbance rejection control (ADRC) strategy integrating adaptive rules is proposed. First
the disturbance observation transfer function of the linear extended state observer part is corrected to avoid certain errors at steady state
enabling more accurate tracking of total disturbances. Second
rule-based design is used as a parameter optimization mechanism to adjust the outer-loop controller parameters online in real time
further optimizing the system's speed and accuracy performance. Then
based on theoretical derivations regarding the total disturbance reconstruction capability and disturbance suppression ability
the internal rationale for how the proposed strategy can effectively enhance system control quality is pointed out
and the system stability is proved using the Leonard-Chipart stability criterion. Finally
the effectiveness and feasibility of this strategy are verified through digital simulation results and robustness analysis under parameter perturbations.
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