DEVICE OF IMPROVING AC POWER QUALITY WITH SUPER CAPACITOR(EDLC)

摘要

The present invention relates to an AC power quality improving device and method using a super-capacitor (EDLC), prevent the reduction factor is derived by the propulsion and braking of the railway car from the AC power rail system, by compensating for voltage drop caused by the driving system of the railway vehicle to the control grid voltage is held constant so that the super-capacitor (EDLC) it is an object to provide an AC power quality improving device and method using that. Applying the present invention, by recognizing the driving conditions of a railway vehicle that runs the state based on the separation of the charge mode and discharge mode effectively compensates by giving active power and reactive power can achieve power factor correction and voltage drop protection, and ultimately The advantage is that energy efficiency and quality can be improved.