Active Hybrid Harmonic Filter, Brand Name : Wanlida

We are offering active hybrid harmonic filter.
ahf technical principle
active hybrid harmonic filter (apfahf) 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 hybrid harmonic filter (apfahf), where, vs is ac power supply, nonlinear load is harmonic source, it generates harmonic and consumes reactive power. Ahf 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.
ahf 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
ahf technical features
•can filter all kinds of harmonic currents
•filtering capability >95% for aimed harmonic
•traction level igbt module, 20khz switching frequency
•response time