Interaction characteristics between multi-port hybrid DC circuit breaker and MVDC distribution system under diversified working conditions

Weijie Wen, Pengyu Li, Hong Cao, Haijin Liu, Xingguo Wang, Hui Lv, Bin Li, Marjan Popov

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Due to the progressive penetration and usage of renewable sources and loads based on power electronics, medium voltage direct current (MVDC) distribution system is getting broad attention. Direct current circuit breakers (DCCBs) are of vital importance for the reliability and flexibility of power system. With features of low cost and micro-operating losses, multi-port hybrid DCCB with negative voltage source (NVS) has been proposed by the authors and might be a better choice. To further promote its industry application in MVDC system, interaction characteristics between DCCB and power system are investigated in this study. The structure of multi-port hybrid DCCB is briefly introduced. Then, considering the diversified working conditions, e.g. single fault, multiple faults and switching load current with random direction, the cooperation sequence of components in multi-port DCCB under all these working conditions is proposed, respectively. Then, based on simulation model established in PSCAD/EMTDC, transient current/voltage distribution pattern inside multi-port DCCB and its mechanism are discussed, and simulation results have verified the superiority and effectiveness of multi-port hybrid DCCB with NVS in MVDC system.
Original languageEnglish
Pages (from-to)2720-2726
Number of pages7
JournalIET Renewable Power Generation
Volume14
Issue number14
DOIs
Publication statusPublished - 26 Oct 2020

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