1. Power quality improvement economical solution
In practical application, the traditional passive filter capacitor compensation and passive filter are commonly used in quality management, Green Power APF and SVG can work together with traditional method, realize more reliable, more convenient and more economic compensation, which is our unique solution for power quality improvement.
2. Capacitor reactive power compensation+SVG
The traditional reactive power compensation adopt slow switching device for capacitor switching, there is problem of differential compensation, poor compensation accuracy, slow response speed. SVG adopts high speed switching device to generate the compensation current, without the problem of compensation accuracy and slow response.
For low cost considerations, most or half compensation is compensated by capacitor groups, the remaining is completed by SVG, which ensure smooth compensation, also low cost, namely SVG+C method.
3. Dynamic reactive power compensation method comparison
Output reactive power
Group switching, rough compensation
Linear output, accurate compensation
Linear output, accurate compensation
0.99, could be partially sensitive
0.99, full resistive to full capacitive
Total response time
Partial specified harmonic
Thoroughly solve three-phase unbalanced
Partial capacity support voltage
Full power support voltage
The cost is little higher than TSC
Higher than TSC
4. Traditional Passive filter+APF
The traditional harmonic compensation is the passive filter of the capacitance and resistance, which has the disadvantages of low compensation precision, slow response, poor reliability and limited harmonic compensation.
APF adopts high speed switching device to generate the compensation current, there is no compensation accuracy problem, and also has fast response.
For low cost considerations, use passive filter to compensate main low harmonics, the remaining harmonic is compensated by APF, to ensure smooth compensation, and also with low cost, that is APF+LC.
In the combined compensation, APF compensated harmonic should avoid LC compensated harmonic, otherwise the compensation has no effect.
5. Advantages of GP APF/SVG+traditional compensation
Can be in parallel with any form of C/TSC/LC.
In practical application, users with traditional power quality management have a variety of forms, a pure capacitor C, series connection 0.4%~14% reactor TSC, passive filter LC, GP power quality products adopt the methods such as suppression of resonance peak, shielding specified harmonic output etc., and ensure reliable running when parallel connection with any passive devices. Especially in parallel with the pure capacitor C, the suppression of resonance technology reaches international advanced level.
Can coordinate with any C/TSC/LC, regardless the main line at any location, CT at any location, can be reliable operation. Does not need to know the current of C/TSC/LC, and L can take from 0 to any value.
SVG is close to the load side, can compensate low harmonics and three-phase unbalance, but compensation for reactive power, due to the faster speed of SVG, will precede the action of capacitors, therefore when SVG for reactive power compensation occasions, recommend SVG near the grid side.
APF/SVG and LC position relation
Main line position
Active near grid side
Active close to load side
Optional power grid side or load side
L could be 0~ arbitrary value
Can effectively compensate low degree harmonics and 3 phase unbalance, but with the capacitor to compensate reactive power is not economical
active and passive parallel, APF should avoid passive filter compensating harmonic frequency.
SVG can be parallel connected with capacitor with same size, to achieve maximum single cabinet power density, lower cost, more economical. The compensation effect and the response speed are all equal to the effect of reactive power compensation using SVG.
Can also be used as a component, integrated in power distribution cabinet with other TSC/LC, to increase power density. We can provide custom solutions of integrating in distribution cabinet with other suppliers LC.
Looking for harmonic power factor compensation power quality improvement economical solution? Green Power Technology is one of the professional manufacturers and suppliers. We have been dedicated to this field for over 20 years and already exported products to India, USA, Germany, etc. Equipped with a productive factory, we warmly welcome you to buy our high quality products made in China at competitive price or try our customized service.