Fault-Tolerant Converter With a Modular Structure for HVDC Power Transmitting Applications

Hu, Y ORCID: 0000-0002-1007-1617, Chen, G, Liu, Y, Jiang, L ORCID: 0000-0001-6531-2791, Li, P, Finney, SJ, Cao, W and Chen, H (2017) Fault-Tolerant Converter With a Modular Structure for HVDC Power Transmitting Applications. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 53 (3). pp. 2245-2256.

Text Fault Tolerance Converter with Modular Structure for HVDC Power Transmitting Applications-final-cgp-hu(1).doc - Author Accepted Manuscript Download (7MB)

Abstract

For the high-voltage direct-current (HVDC) power transmission system of offshore wind power, dc/dc converters are the potential solution to collect the power generated by off-shore wind farms to HVDC terminals. The converters operate with high-voltage gain, high efficiency, and fault tolerance over a wide range of operating conditions. In this paper, an isolated ultrahigh step-up dc/dc converter with a scalable modular structure is proposed for HVDC offshore wind power collection. A flyback-forward converter is employed as the power cell to form the expandable electrically isolated modular dc/dc converter. The duty ratio and phase-shift angle control are also developed for the proposed converter. Fault-tolerant characteristics of the converter are illustrated through the redundancy operation and fault-ride-through tests. Redundancy operation is designed to maintain high operation efficiency of the converters and fault-ride-through operation improves the converter reliability under harsh operating conditions. Analytical studies are carried out, and a 750-W prototype with three modular cells is built and experimentally tested to verify the performance of the proposed modular dc/dc converter.

Item Type:	Article
Uncontrolled Keywords:	DC/DC converters, high step-up, high-voltage direct-current (HVDC), scalability, wind power generation
Depositing User:	Symplectic Admin
Date Deposited:	03 Jul 2017 07:11
Last Modified:	15 Mar 2024 04:55
DOI:	10.1109/TIA.2017.2657480
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3008258