Explosion-Proof Test Scheme for UHV Flexible DC Converter Valve Submodules

doi:10.3969/j.issn.1008-0198.2026.03.018

Abstract

Abstract: The explosion-proof test for submodules of UHV flexible DC transmission converter valves suffers from inadequate charging voltage, incomplete test coverage, and ambiguous criteria. This paper examines typical explosion faults in UHV flexible DC converter valve submodules, identifies key weak points under explosive loads, and defines quantified test indicators centered on these vulnerabilities. A repeatable explosion-proof test scheme is then designed for submodules, including tests for upper/lower arm through-faults, bypass switch failure, and post-fault current-carrying capability. Finally, prototype submodules from a domestic UHV flexible DC project undergo explosion-proof testing, confirming their compliance with explosion-resistance requirements.

Key words: UHV flexible DC, converter valve, submodule explosion-proof, explosion characteristics, explosion-proof test

CLC Number:

TM721.1

LI Qi, YANG Yong, ZHANG Tao, ZHOU Huiying, SITU Liukai, QIN Liang. Explosion-Proof Test Scheme for UHV Flexible DC Converter Valve Submodules[J]. Hunan Electric Power, 2026, 46(3): 139-145.

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