Power flow control in DC transmission grids using mechanical and semiconductor based DC/DC devices

Dragan Jovcic, Masood Hajian Foroushani, Huibin Zhang, Gunar Asplund

Research output: Chapter in Book/Report/Conference proceedingConference contribution

64 Citations (Scopus)

Abstract

DC power flow can be controlled though N-1 different DC lines/cables in a DC grid having N individual AC/DC converters. A large meshed DC grid can have more DC lines, and since we can not control power in all lines/cables, an overload may result. In this paper, two methods are proposed for DC power flow control through DC lines/cables. The first method involves using extra resistors embedded in series with DC lines/cables and switched by mechanical or semiconductor based DC circuit breakers. The other method includes installing DC/DC converter at one of the DC line/cable ends with the purpose of DC power flow control. It is shown that the first approach suits better for a short transmission line/cable, while the second one is proposed for a long transmission line/cable with high rated current and higher voltage drop. PSCAD simulation results are presented for a half bridge bidirectional DC chopper employed for DC power flow control between two large 370kV DC grids.
Original languageEnglish
Title of host publicationAC and DC Power Transmission (ACDC 2012), 10th IET International Conference on
PublisherIET
Pages1-6
Number of pages6
ISBN (Electronic)978-1-84919-700-7
DOIs
Publication statusPublished - Dec 2012
EventIET ACDC 2012 Birmingham, December 2012 - , United Kingdom
Duration: 4 Dec 20127 Dec 2012

Conference

ConferenceIET ACDC 2012 Birmingham, December 2012
CountryUnited Kingdom
Period4/12/127/12/12

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Jovcic, D., Hajian Foroushani, M., Zhang, H., & Asplund, G. (2012). Power flow control in DC transmission grids using mechanical and semiconductor based DC/DC devices. In AC and DC Power Transmission (ACDC 2012), 10th IET International Conference on (pp. 1-6). IET. https://doi.org/10.1049/cp.2012.1972