Stepped 2-Level Operation of Three-Port Modular DC/DC Converter Applied in HVDC Application

Hongcheng You; Xu Cai

doi:10.1109/ACCESS.2018.2869730

IEEE Access (Jan 2018)

Stepped 2-Level Operation of Three-Port Modular DC/DC Converter Applied in HVDC Application

Hongcheng You,
Xu Cai

Affiliations

Hongcheng You: ORCiD; Wind Power Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China
Xu Cai: Wind Power Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China

DOI: https://doi.org/10.1109/ACCESS.2018.2869730
Journal volume & issue: Vol. 6
pp. 53822 – 53832

Abstract

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High-voltage dc/dc converter is the key equipment to interconnect high-voltage dc (HVdc) systems with different voltage levels and to build dc grid. This paper presents a novel three-port modular dc/dc converter (TP-MDCC) to interconnect three HVdc systems, and it offers the following merits: 1) high efficiency for the elimination of multiple dc/ac conversion stages and transformers; 2) modular design and small submodule (SM) capacitance requirement; 3) low $\text{d}v/\text{d}t$ stress; and 4) the sorting algorithm of the SM capacitor voltages needs only to be executed twice in a period, which poses small computation burden. In this paper, the operation principle and the control strategy of the TP-MDCC are analyzed, and the simulation and experimental results verify the effectiveness of the converter.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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