Active harmonic filter

Overview

Active harmonic filter is a new type of equipment specifically designed for electrical harmonic mitigation. The active harmonic filter consists of two main components: a command current calculation circuit and a compensation current generation circuit. The command current calculation circuit monitors the line current in real time and converts the analog current signal into a digital signal. This signal is then fed into a high-speed digital signal processor (DSP) for signal processing, separating the harmonics from the fundamental wave. The DSP then sends drive pulses in the form of pulse-width modulated (PWM) signals to the compensation current generation circuit, which drives the IGBT or IPM power module. This generates a compensation current with equal amplitude and opposite polarity to the grid harmonic current, which is then injected into the grid to compensate or offset the harmonic currents, actively eliminating power harmonics.

Lafaelt active harmonic power 6.0 is an advanced solution to solve the harmonic problem with IGBT/SIC. Our active power filter offters a selectable priority function of harmonic filtering, power factor correction(reactive power compensation) and Three-phase imbalance regulation.

Principle

Features

1. Suppresses harmonic currents generated by non-linear loads

2. More than 97% harmonic filtering rate

3. Even times harmonic mitigation, 2nd, 4th, 6th harmonics problem solving.

4. Automatic detuning eliminates system resonance concerns

5. Customized HMI for wall mounted or rack mounted type 

6. Reduces line and transformer losses, improves equipment overheating, and extends equipment life

7. 80KHz switching frequency

8. Three-phase imbalance regulation

Principle

Features

1. Suppresses harmonic currents generated by non-linear loads

2. More than 97% harmonic filtering rate

3. Even times harmonic mitigation, 2nd, 4th, 6th harmonics problem solving.

4. Automatic detuning eliminates system resonance concerns

5. Customized HMI for wall mounted or rack mounted type 

6. Reduces line and transformer losses, improves equipment overheating, and extends equipment life

7. 80KHz switching frequency

8. Three-phase imbalance regulation

Application

1. Data Center
   

2. Solar System

3. Li Battery

4. Automobile

5. Semiconductor

6. Petrochemical

7. New Energy

8. Metal
   

9. Cement

10. Glass

11. Paper Making

12. Water treatment
    

13. Public building

14. Hospital and Medical

15. Industrial manufacturing

Technical Parameters

Active Harmonic Filter Specification