Investigation of interconnecting two Chinese LCC-HVDC through LCL DC/DC Converter

Weixing Lin*, Dragan Jovcic, Liangzhong Yao, Wei Sun, Xiaojun Lu, Jinyu Wen

*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

In order to increase the operating flexibility and reliability of HVDC lines for power transmission, this paper studies the technical feasibility of interconnecting two Chinese LCC HVDC using a high power DC/DC converter. A new control system is proposed for each rectifier, inverter and DC/DC converter to enable independent operation of each terminal. DC voltage droop feedback is designed to moderate power order at each terminal which facilitates DC power balancing without communication between terminals. Simulation on detailed PSCAD model is presented for several extreme operating scenarios and responses confirm many operational benefits of the proposed topology. Loss of one terminal in this 4-terminal DC grid, for example, will not disturb operation of the remaining 3 terminals. This preliminary study concludes that there are no serious technical challenges, while operating benefits might be significant.

Original languageEnglish
Title of host publication2015 IEEE PES ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC)
PublisherIEEE Press
Pages1-5
Number of pages5
ISBN (Electronic)978-1-4673-8132-1
ISBN (Print)978-1-4673-8131-4
DOIs
Publication statusPublished - 2015
EventIEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC) - Brisbane, Australia
Duration: 15 Nov 201518 Nov 2015

Conference

ConferenceIEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)
CountryAustralia
CityBrisbane
Period15/11/1518/11/15

Keywords

  • AC-DC power conversion
  • DC power systems
  • DC power transmission
  • HVDC converters
  • HVDC transmission
  • DC CONVERTER
  • GRIDS

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