Wanlida Active Power Filter

We are offerng wanlida 300a active power filter which can dynamically filter harmonic with variable amplitude and frequency and compensate reactive power.
apf technical principle
active power filter (apf/ahf) is new power electronic equipment which can dynamically filter harmonic with variable amplitude and frequency and compensate reactive power, it overcome the shortages of conventional lc filter and obtained the better compensation performances than passive filter.
the right diagram is schematic diagram of active power filter (apf/ahf), where, vs is ac power supply, nonlinear load is harmonic source, it generates harmonic and consumes reactive power. Apf system is composed of instruction current operational circuit and compensation current generation circuit, the instruction current operational circuit is mainly to detect current components in harmonic current and reactive power of compensation object, and the compensation current generation circuit generates equivalent compensation current with same amplitude and inverse polarity with harmonic current to filter harmonics according to instruction signal, the main circuit adopts pwm converter.
apf functions
reduce harmonic distortion
improve power factor
reduce line loss
prevent neutral line from overheat
prevent power equipments from noise, overheat and vibration like motor, transformer etc.
Prevent signal transmission equipments from data loss and interference
prevent measurement error caused by non-sinusoidal current and voltage.
Prevent sensitive semi-conductive device from damage
prevent circuit breaker trip.
Prevent capacitors from burn due to harmonic resonance
ensure safety of power system and reduce energy consumption
apf technical features
can filter all kinds of harmonic currents
filtering capability >95% for aimed harmonic
traction level igbt module, 20khz switching frequency
response time