Like an SVC, the STATCOM instantly and continuously provides variable reactive power in response to voltage transients, supporting the stability of grid voltage. The STATCOM operates according to voltage source principles, combining unique PWM (pulse width modulation) switching in IGBTs (insulated gate bipolar transistors). The unit`s effective rating and response speed is unequalled, and can be dedicated to active harmonic filtering and voltage flicker mitigation. Its components mean the STATCOM`s footprint can be extremely small, and ABB has branded this downsized, high-performance STATCOM concept SVC Light.