Coordination Control of Power Flow Controller and Hybrid DC Circuit Breaker in MVDC Distribution Networks

Jianquan Liao, Niancheng Zhou, Zian Qin*, Pavel Purgat, Qianggang Wang, Pavol Bauer

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

25 Downloads (Pure)

Abstract

The two main challenges of medium voltage direct current (MVDC) distribution network are the flexible control of power flow (PF) and fault protection. In this paper, the power flow controller (PFC) is introduced to regulate the PF and inhibit the fault current during the DC fault. The coordination strategy of series-parallel PFC (SP-PFC) and hybrid DC circuit breaker (DCCB) is proposed. By regulating the polarity and magnitude of SP-PFC output voltage during the fault, the rising speed of fault current can be suppressed so as to reduce the breaking current of hybrid DCCB. The access mode of SP-PFC to the MVDC distribution network and its topology are analyzed, and the coordination strategy between SP-PFC and hybrid DCCB is investigated. Moreover, the emergency control and bypass control strategies of SP-PFC are developed. On this basis, the mathematical model of SP-PFC in different fault stages is derived. With the equivalent model of SP-PFC, the fault current of the MVDC distribution network can be calculated accurately. A simulation model of the MVDC distribution network containing SP-PFC is established in MATLAB/Simulink. The fault current calculation result is compared with the simulation result, and the effectiveness of the proposed coordination strategy is verified.
Original languageEnglish
Article number9627866
Pages (from-to)1257-1268
Number of pages12
JournalJournal of Modern Power Systems and Clean Energy (MPCE)
Volume9
Issue number6
DOIs
Publication statusPublished - 2021

Keywords

  • DC circuit breaker (DCCB)
  • Medium voltage direct current (MVDC) distribution network
  • fault current
  • power flow controller (PFC)

Fingerprint

Dive into the research topics of 'Coordination Control of Power Flow Controller and Hybrid DC Circuit Breaker in MVDC Distribution Networks'. Together they form a unique fingerprint.

Cite this