Damping torque analysis of VSC-HVDC supplementary damping controller for small-signal stability

Tao Zhou, Zhong Chen, Bixing Ren, Siqi Bu, Puyu Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


In order to improve the small-signal stability of AC/DC hybrid systems containing voltage-source converter based high-voltage direct current (VSC-HVDC), this article extends damping torque analysis (DTA) theory to VSC-HVDC supplementary damping controller to analyze its dynamic impacts and inhibit oscillations. Firstly, this article presents the mechanism and procedure of VSC supplementary damping controller and establishes the linearized model of AC/DC system with damping controllers. On this basis, the DTA theory of VSC supplementary damping controller and the equation of damping torque index (DTI) are derived. The theory can be applied to the design of the damping controller including the selection of installation location and channel as well as the parameter tuning. Finally, case studies are carried out in two AC/DC hybrid systems containing VSC-HVDC. The simulation results verify the correctness and feasibility of DTI analysis. VSC damping controllers designed by the proposed method can effectively suppress oscillations and improve the dynamic stability of the AC/DC system.

Original languageEnglish
Pages (from-to)202696-202706
Number of pages11
JournalIEEE Access
Publication statusPublished - Nov 2020


  • AC/DC system
  • Damping torque analysis (DTA)
  • Small-signal stability
  • Supplementary damping controller

ASJC Scopus subject areas

  • General Computer Science
  • General Materials Science
  • General Engineering


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