TPTPC and BHC integrated grid connected energy storage system for power loss reduction

Abstract

Purpose

This paper aims to propose a bidirectional hidden converter (BHC)-based three-phase DC–AC conversion for energy storage application. BHC is the new concept to vary an energy storage device voltage into wide range. Hidden converter power loss and power rating are reduced by using zero-sequence injection-based carrier-based pulse-width modulation (CBPWM) strategy.

Design/methodology/approach

By using this control strategy, a BHC processes only little amount of power during double-stage conversion, mostly during direct or single-stage conversion of the three-phase three-port converter (TPTPC) only processing the maximum power.

Findings

TPTPC consists of two sets of positive group switches for inversion process, one set of switches is regular inverter switches called vertical positive group switches, and the second set is anti-series switches, which are horizontally connected for direct or single-stage conversion.

Originality/value

Characteristics, principles and implementations of proposed DC–AC 3Ø conversion system and its PWM strategy are analyzed. Through experimental outputs, the effectiveness and viability of the proposed solutions are validated.

Citation

Krishnan, S., Pandi, P. and Mopidevi, S. (2023), "TPTPC and BHC integrated grid connected energy storage system for power loss reduction", Circuit World, Vol. 49 No. 3, pp. 328-334. https://doi.org/10.1108/CW-01-2021-0006