A Shunt Power Quality Conditioner (SPQC) applied to distribution networks is proposed in this paper. SPQC is an IGBT based on shunt PWM converter coupled with super capacitor energy storage system. It can act as APF
moreover
by taking use of high power density of super capacitor
and it is able to compensate rapid changing real power of fluctuating load to keep mains side outputting unit power factor and constant power. Also
it can support customer voltage for a short term during system outage. Simulations have been carried out to verify the construction and control strategy of SPQC for load quality improvement.