High-Quality LV AHF for Harmonic Reduction - Leading China Suppliers & Factory Solutions

The AHF is a cutting-edge solution designed to combat the critical issue of power harmonic pollution, making it an essential tool for enhancing power quality. Developed by leading manufacturers in China, this specialized equipment utilizes advanced power electronics and digital signal processing technologies based on high-speed DSP processors. The AHF operates as a harmonic current generator, meticulously tracking harmonic components within the current and generating equal amplitude harmonic currents with an opposite phase.

The system comprises two main components: the instruction current operation circuit and the compensation current generation circuit. The instruction current operation circuit continuously monitors real-time current, converting analog signals into digital form, which is processed by a high-speed DSP. This process effectively separates harmonic and fundamental currents to derive the instruction current. The instruction current is then transmitted to the compensation current generation circuit as a pulse width modulation (PWM) signal via the current tracking control and drive circuits. Leveraging IGBT and IPM power modules, the AHF produces a compensation current that mirrors the harmonic current in amplitude but is polarity opposite. This injected compensation current effectively cancels out harmonic currents in the power grid, actively eliminating power harmonics and ensuring a dynamic, rapid, and comprehensive solution to power quality issues.

As a trusted supplier with a state-of-the-art factory in China, we are committed to delivering products that meet the highest standards of power quality and efficiency. Choose AHF for effective power harmonic control and enhanced electrical performance.

Product Detail

Industrial Applications

AHF is suitable for industrial high-capacity loads, such as rectifiers, frequency converters, large UPS, arc furnaces, intermediate frequency furnaces, three-phase chargers, and other three-phase load scenarios.

Commercial Applications

Suitable for single-phase nonlinear loads in commercial buildings, such as energy-saving lamps, computers, UPS, elevators, variable frequency air conditioners, etc., which generate third harmonic and heat up the N-line.

Technical Indicators

Item	400V			660V
Current rating	50A	100A	135A	50A	100A
Voltage level	380V, 440V, 480V			600V, 660V, 690V
Voltage range	-20%~+15%
Frequency	50/60Hz±5%
Phases	3 phase 3 wire, 3 phase 4 wire
Response time	≤10us
Parallel operation	Unlimited, Max 6 modules for one SAM controller
Overload capability	110%, 1 minute
Efficiency	≥97.5%
CT location	Grid side or Load side
Function	Harmonics, reactive power, unbalance compensation
Harmonics	Up to 50th order
Communication	Modbus, TCP/IP, IEC61850, others upon request

Product Advantages

Thermal design and structural optimization based on precise models;

Miniaturization, occupying less space;

Compensation for specified harmonic frequencies, adjustable inductive and capacitive reactive power compensation system, automatic detection of unbalanced loads, suppression of system resonance, and full function monitoring system;

Increased operational efficiency by avoiding unplanned stops;

Lower losses in the transformer;

Prolonged equipment lifetime;

Standard compliance.

Frequently Asked Questions (FAQ)

What is the primary function of an Active Harmonic Filter (AHF)?

An AHF dynamically mitigates power quality issues by providing simultaneous harmonic, reactive power, and unbalance compensation, targeting up to the 50th harmonic order.

Which voltage levels and ratings do your AHF modules support?

We offer configurations for 400V grids (supporting 380V, 440V, 480V with current ratings of 50A, 100A, and 135A) and 660V grids (supporting 600V, 660V, 690V with current ratings of 50A and 100A).

How fast is the response time of the filter?

The system features an ultra-fast response time of ≤10 microseconds, allowing it to dynamically track and suppress rapid load changes and high-speed transients.

Can multiple AHF modules be installed in parallel?

Yes, parallel operation capability is unlimited, and up to 6 modules can be managed simultaneously under a single SAM controller for high-capacity requirements.