1. Product overview

Active power filter (APF:Active power filter) is a new type of power electronic device used to dynamically suppress harmonics and compensate reactive power. It can quickly track and compensate harmonics of different sizes and frequencies. The reason why it is called active is that compared with passive LC filter, it can only passively absorb harmonics of fixed frequency and size. APF can control and actively output the size, frequency and phase of the current by sampling the load current and separating each harmonic and reactive power, and quickly respond to offset the corresponding current in the load to achieve dynamic tracking compensation, and can complement both harmonic and reactive power and unbalance.

2. The working principle

The load current in the power grid is detected in real time, the harmonic current component is quickly separated, and the control command is generated according to the size of the harmonic current, and the compensation current of equal and opposite direction is generated in real time and injected into the power grid to achieve instantaneous filtering of harmonic current.

3. Performance characteristics

Comprehensive functions: filtering, compensation, voltage regulation and three-phase unbalanced governance

Safe and reliable: resonance prediction management, effectively prevent capacitor capacity attenuation, to avoid resonance risk

Strong adaptability: vertical series, module series, wall hanging series, vehicle series, column series, cabinet series and other products are suitable for different working conditions

Easy maintenance: selection, installation, operation and maintenance are simple, and can be expanded indefinitely