Intelligent Three Phase Active Power Filter 50A-200A Active harmonic filter

Intelligent Three-Phase Unbalanced Solution Active Power Filter

Product Overview

Active electric filter is a new electric electronic device for dynamically suppressing harmonics and compensate for reactive power that can compensate for harmonics varying in size and frequency as well as varying reactive power.

The active electric filter is called active, as the name suggests, the device needs to provide power supply (to compensate the main circuit harmonic), its application can overcome the shortcomings of the traditional harmonic addition and reactive compensation methods such as LC filter (the traditional can only be fixed compensation), to achieve dynamic tracking compensation.The eye can be both harmonic and reactive.

Active power filter is a new power harmonic governance special equipment made of modern power electronic technology and digital signal processing technology based on high-speed DSP devices.It consists of two main parts: command current operation circuit and compensation current occurrence circuit.The command current operation circuit monitors the current in the line in real time, and converts the analog current signal into a digital signal, sends to a high-speed digital signal processor (DSP) to process the signal, separate the harmonic from the base, sends a drive pulse to the compensation current occurrence circuit in the form of pulse window modulation (PWM) signal, drive the GBT or IPM power module, generate a compensation current equal to opposite polarity into the grid, compensate or offset the harmonic current, and actively eliminate power harmonics.

Functional Characteristics

◆ Filtering accuracy is high, and the harmonic current filtration rate can reach more than 97%;

◆ Filtering range is wide, filter times: 2- -50 harmonics and inter harmonics;

◆ Responds fast to load fluctuations, with a response time of 1us;

◆ Dynamically injects current to suppress harmonic and compensate for power factors;

◆ Does not become resonant with the system;

◆ Can expand the capacity in multiple combinations;

◆ Suppresses system over voltage and improves system voltage stability;

◆ Damped power system power oscillation;

◆ Can inhibit the voltage flash change, compensate for the three-phase imbalance, and improve the power factor;

◆ Strong self-protection and stability of the system;

Technical Parameter

◆ Rated working voltage: 380V / 220V, 50Hz

◆ Rated harmonic compensation capacity: 50A / 100A / 150A / 200A

◆ Whole machine power consumption: less than 3% of the capacity

◆ Inhibition harmonic effect: to meet the state standard requirements, the steady-state THD can be reduced to below 5%

◆ Rated insulation voltage: 3000V AC, 2500V DC

Performance Specification

◆ Dynamic active filtering, comprehensively improve the power quality;

◆ DSP full digital control, 20KHz switch frequency, rapid response to dynamic load;

◆ Harmonic compensation times can be selected, up to 50 harmonics can be filtered out;

◆ Our active power filter can choose to compensate for reactive power simultaneously;

◆ Has a three-phase unbalanced compensation capability;

◆ Has the automatic flow restriction function, and no overload occurs;

◆ Efficiency and full load loss less than 2.57;

◆ Parallel installation mode, simple installation, small volume;

◆ Reduces the line loss, eliminates the transformer and motor heating caused by the harmonic wave, and realizes the substantial energy saving of the system;

The filtering effect of the

◆ Active power filter is not affected by the system impedance changes, and can automatically suppress the system resonance;

◆ May select local compensation, partial compensation or total compensation according to the distribution structure, and CT may be located on the power side or load side;

◆ Is Easy to scale and redundant in design and runs up to 10 units in parallel.