Technical Description of Static Compensators (STATCOM)

  • Colin DavidsonEmail author
  • Marcio Oliveira
Living reference work entry
Part of the CIGRE Green Books book series (CIGREGB)


The static synchronous compensator (STATCOM) is a shunt-connected reactive power compensation device using a self-commutated converter, usually a voltage-sourced converter (VSC). Its name arose from its conceptual similarity to a traditional (rotating) synchronous compensator or condenser. A STATCOM can perform a similar function to an SVC but has better speed of response and better reactive power support capability during AC system voltage dips and is more compact. This chapter describes the main technological aspects of a STATCOM, including the topologies suitable for the converter and architecture of the controls. Two main converter topologies are considered – the type using magnetic combination of multiple six-pulse converter bridges (with thyristors or GTOs) and the modular multilevel converter type of STATCOM which is now becoming common. Descriptions of the other main items of primary equipment, along with layout and performance aspects, are also given.


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© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.GE’s Grid Solutions BusinessStaffordUK
  2. 2.ABBVästeråsSweden

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