High-Voltage-Gain DC-DC Step-Up Converter with Bifold Dickson Voltage Multiplier Cells

Abstract

This paper presents an interleaved boost converter with a bifold Dickson voltage multiplier suitable for interfacing low-voltage renewable energy sources to high-voltage distribution buses and other applications that require a high-voltage-gain conversion ratio. The proposed converter was constructed from two stages: an interleaved boost stage, which contains two inductors operated by two low-side active switches, and a voltage multiplier cell (VMC) stage, which mainly consists of diodes and capacitors to increase the overall voltage gain. The proposed converter offers a high-voltage-gain ratio with low voltage stress on the semiconductor switches as well as the passive components. This allows the selection of efficient and compact components. Moreover, the required inductance that ensures operation in the continuous conduction mode (CCM) is lower than the one in the conventional interleaved boost converter. The distinction of the proposed converter is that the inductors' currents are equal, regardless of the number of VMCs. Equal sharing of interleaved boost-stage currents reduces the conduction loss in the active switches as well as the inductors and thus improves the overall efficiency, as the conduction power loss is a quadratic function. In this paper, the theory of operation and steady-state analysis of the proposed converter are illustrated and verified by simulation results. A 200-W hardware prototype was implemented to convert a 20-V input source to a 400-V dc load and validate both the theory and the simulation.

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Center for Research in Energy and Environment (CREE)

Second Research Center/Lab

Intelligent Systems Center

Keywords and Phrases

Electric inductors; Electric inverters; Gain measurement; HVDC power transmission; Maximum power point trackers; Renewable energy resources; Solar power generation; Bifold Dickson; DC-DC; High gain; Maximum Power Point Tracking; Photovoltaic (PV); Renewable; Solar; Voltage multipliers; DC-DC converters; Voltage multiplier cell (VMC)

International Standard Serial Number (ISSN)

0885-8993; 1941-0107

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Oct 2019

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