Analysis and Optimization of a High-Efficiency Residential Energy Harvesting System with Dual Half-Bridge Converter

Abstract

Parameter optimization for a residential power router with a dual half-bridge (DHB) dc-dc converter is proposed. In order to minimize the power losses of the dual half bridge dc-dc converter, the relationship between the zero-voltage switching range and transformer inductance parameters of the DHB is described. Based on the capacity of photovoltaic generation and battery storage, the transformer parameters are selected to limit the reactive power transfer. A case study is given to verify the optimization method given in this paper.

Existing System

Three-Port Bidirectional DC–DC Converter for PV Application.

Proposed System

The power flow of a residential energy harvesting system with a DHB converter is analyzed in this paper. The relationship between the ZVS range and leakage inductance on the two sides of the transformer and magnetizing inductance is derived. A small magnetizing inductance can broaden the ZVS range. When the magnetizing inductance is constant, a high leakage inductance on primary side of transformer will broaden the ZVS range of the secondary bridge and vice versa. A case study is conducted to help to understand the design method proposed in this paper.

Architecture

Topology of the residential energy harvesting system