To address the issues of limited functionality and poor dynamic characteristics in traditional on-load tap changer transformers,this paper proposes a topological structure for a hybrid on-load tap changer transformer.This structure combines the efficiency and reliability of power-frequency transformers with the controllability of power electronic converters.By integrating back-to-back converters and designing corresponding control strategies,con-tinuous voltage regulation and reactive power compensation for the on-load tap changer transformer are achieved.Ad-ditionally,the paper introduces a series voltage compensation method to provide fault protection for the load.Fi-nally,an experimental model of the hybrid on-load tap changer transformer is built using MATLAB simulation soft-ware and an experimental platform.Both simulation and experimental results verify the correctness and effectiveness of the proposed topological structure and control strategy.
on-load tap changer transformerback-to-back converterreactive power compensationfault protection
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