Low voltage automatic contactor switched capacitor banks or filter banks typically use a delay time of 30 – 40 seconds between steps. This delay time is chosen to ensure that the capacitors have discharged prior to being re-connected. The long delay time limits the autobank’s ability to track rapidly changing loads. The slow response time may result in an overload condition in filter banks. Consider the case where a large harmonic producing load is turned on. The initial steps of the filter could be overloaded before the autobank has time to connect the required compensation. Acceptable solutions must account for this switching delay.
Conventional automatic power factor correction systems consist of a power factor controller, power capacitors,and switch conctactors. Due to the discharge time of the capacitors, the resetting times of the contactors are longer than 60 seconds.
New applications are increasingly calling for technologies that respond in real time. This is where dynamic power factor correction systems such as electronic thyristor modules are replacing slow electromechanical switches. Thyristor switch offer advantages of fast response time(Lower than 20ms) , reduction of reactive power and lower energy costs.
YTPQC-SVG Static Var Generator takes the high-power voltage inverter as the core. It can quickly absorb or emit the required reactive power by adjusting the amplitude and phase of the inverter output voltage or directly controlling the amplitude and phase of the AC side current.
SVG's response speed is no more than 5ms, which can better suppress voltage fluctuation and flicker. Static Var Generator has the best compensation effect on voltage fluctuation and flicker.
After all, SVG is much more expensive than capacitor banks. We have a better solution to realize the better cost performance together with fast response time: Hybrid Power Factor Correction .
Subscribe to us to enjoy event prices and get some of the best prices.