Voltage regulation with STATCOMs: Modeling, control and results

Amit K. Jain, Karan Joshi, Aman Behal, Ned Mohan

Research output: Contribution to journalArticlepeer-review

146 Scopus citations


This paper presents system modeling and control design for fast load voltage regulation using static compensators (STATCOMs). The modeling strategy gives a clear representation of load voltage magnitude and STATCOM reactive current on an instantaneous basis. The particular coordinate transformation employed here also facilitates extraction of linearized system dynamics in conjunction with circuit simulators. It is rigorously shown that the control problem of load voltage regulation using reactive current is nonminimum phase. Linear and nonlinear controllers for the regulation problem are designed and compared via simulation results. Internal dynamics of the STATCOM are modeled using the same strategy. Lyapunov based adaptive controllers are designed for controlling the STATCOM reactive current while maintaining its dc bus voltage. Simulation results of the controlled STATCOM integrated with the load bus voltage controller are presented to show efficacy of the modeling and control design.

Original languageEnglish (US)
Pages (from-to)726-735
Number of pages10
JournalIEEE Transactions on Power Delivery
Issue number2
StatePublished - Apr 2006


  • Flicker mitigation
  • Nonlinear control
  • Power quality
  • Static compensators (STATCOMs)
  • System modeling
  • Voltage regulation

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