Novel transient power control schemes for BTB VSCs to improve angle stability

Sungyoon Song, Sungchul Hwang, Baekkyeong Ko, Seungtae Cha, Gilsoo Jang

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This paper proposes two novel power control strategies to improve the angle stability of generators using a Back-to-Back (BTB) system-based voltage source converter (VSC). The proposed power control strategies have two communication systems: a bus angle monitoring system and a special protection system (SPS), respectively. The first power control strategy can emulate the behaviour of the ac transmission to improve the angle stability while supporting the ac voltage at the primary level of the control structure. The second power control scheme uses an SPS signal to contribute stability to the power system under severe contingencies involving the other generators. The results for the proposed control scheme were validated using the PSS/E software package with a sub-module written in the Python language, and the simple assistant power control with two communication systems is shown to improve the angle stability. In conclusion, BTB VSCs can contribute their power control strategies to ac grid in addition to offering several existing advantages, which makes them applicable for use in the commensurate protection of large ac grid.

Original languageEnglish
Article number1350
JournalApplied Sciences (Switzerland)
Issue number8
Publication statusPublished - 2018 Aug 11


  • Angle stability
  • Power control
  • Special protection system

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


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