Static VAR Generator (SVG)

  • SVG is a reactive power compensation device (a type of static-VAR compensator) that injects or absorbs reactive power dynamically, to maintain a desired power factor / voltage stability.
  • It uses modern power-electronic converters (e.g. voltage-source converters with IGBT modules) rather than traditional capacitor banks or synchronous condensers. 
  • Because it’s electronic and fast, SVG can respond rapidly (often sub-cycle or in milliseconds) to changes in load conditions — making reactive power compensation “real-time.”
  • SVG can correct both capacitive and inductive reactive power, handle leading or lagging power factor, and adapt to variable load/unbalanced loads as needed.

Primary benefits of SVG

  • Improved power factor (often achieving near-unity PF, e.g. 0.99).
  • Voltage stabilization and improved system stability under fluctuating or unbalanced loads.
  • Reduced reactive power losses, lower utility penalties, improved overall system efficiency.
  • Compatibility with modern variable loads and dynamic demand conditions — more flexible and safer than traditional capacitor-bank PFC.