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The active harmonic filter (AHF) is an intelligent compensation device based on advanced power electronics technology, designed to address harmonic pollution in industrial, commercial and public facilities. By detecting, dynamically tracking and precisely offsetting harmonic currents in real time, it effectively improves power quality, reduces equipment losses and helps companies achieve the dual goals of energy conservation and safe use of electricity.
High-precision harmonic detection system
Real-time monitoring: Uses high-speed sampling circuit and FFT algorithm to capture 2nd to 50th harmonic components in milliseconds with 99% accuracy.
Dynamic response: Adapts to load changes and seamlessly tracks harmonic fluctuations to ensure no compensation delay.
Intelligent digital controller (driven by DSP+FPGA dual core)
Precise calculation: based on instantaneous reactive power theory, real-time generation of reverse compensation current commands to eliminate harmonic and reactive interference.
Advanced control strategy: hysteresis control + predictive algorithm dual mode switching, current tracking error <3%, response time ≤100μs.
Efficient inverter module (IGBT full bridge topology)
Military-grade components: Infineon/Mitsubishi IGBT modules are used, withstanding voltage 1200V and switching frequency 20kHz, ensuring high-frequency compensation stability.
Low-loss design: full-bridge soft switching technology reduces thermal loss, with an overall efficiency of >97%, making it more reliable for long-term operation.
Multiple protections and intelligent operation and maintenance
Active protection: three-level protection mechanism for overvoltage/overcurrent/overheating, with a fault self-diagnosis rate of 95%, to avoid unexpected shutdowns.
Remote monitoring: Supports Modbus/cloud platform access, real-time push of power quality reports, and a 40% reduction in operation and maintenance costs.
✅ Solves pain points
Eliminates safety hazards such as transformer overheating and aging cables, extending equipment life by more than 30%.
Prevents misoperation of precision instruments, reduces production line downtime losses, and ensures continuous production.
Meets international harmonic standards such as IEEE 519 and easily passes environmental protection acceptance.
✅ Applicable scenarios
Industrial fields: factories with intensive use of inverters/intermediate frequency furnaces/welding equipment, semiconductor production lines.
Commercial facilities: data centres, hospitals, large shopping malls (harmonic suppression for elevators/LED lighting).
New energy systems: grid-connected harmonic suppression for photovoltaic power stations and clusters of charging piles.