Cost-Based Adaptive Droop Control Strategy for VSC-MTDC system

Sungyoon Song, Roy A. McCann, Gilsoo Jang

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


This study proposes a cost-based adaptive (CBA) droop control strategy for use in a voltage source converter (VSC)-based multi-terminal high voltage direct current (MTDC) system. Rather than using a fixed droop gain, we suggest the CBA droop control scheme, which reduces the total incremental generation cost of ac systems, while sharing the burden based on the available capacity of VSCs at the post-contingency-steady-state operating point. Following a certain VSC outage in the MTDC system, unbalanced power is allocated based on the equal incremental cost principle to reduce the total active power generation cost. The results were verified through a transient simulation on an MTDC system with four monopole VSCs, and outage contingency scenarios were presented with three groups of generation cost curves. The results indicate that the CBA droop control strategy can provide greater contributions to the economic operation of the MTDC system, while achieving robust control.

Original languageEnglish
Article number9121742
Pages (from-to)659-669
Number of pages11
JournalIEEE Transactions on Power Systems
Issue number1
Publication statusPublished - 2021 Jan


  • Adaptive droop control
  • equal incremental cost principle
  • lagrangian method

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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