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An electronic power transformer (EPT) with supercapacitors storage energy system is proposed in this paper. The proposed system consists of an EPT, a supercapacitor bank and a bidirectional dc–dc converter. The supercapacitor bank is connected to the dc link in EPT through the dc–dc converter. The advantage of the proposed system over the EPT is to provide added ability to ride voltage momentary interruptions,...
The idea that the secondary voltage of the conventional transformer is selected as the reference voltage of electronic power transformer - EPT's output voltage is proposed on the base of the analysis of parallel principle of EPT and conventional transformer in this paper, in order to eliminate the circulation current and the power unbalance resulted from the parallel operation of EPT and conventional...
An ac/dc hybrid parallel operation control scheme of EPT based on distributed logic control is proposed in order to eliminate circulation current and further improve redundancy performance in this paper. The proposed ac/dc hybrid parallel operation control scheme consists of a dc side current-sharing control scheme and an ac side current-sharing control scheme. The realization of current-sharing no...
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