GY-AHF-PLUS High-spec Active Harmonic Filter
GY-AHF-PLUS active harmonic filter integrates advanced DSP+CPDL full-digital control technology, three-level topology, and real-time harmonic detection algorithms to provide high-performance power quality improvement solutions. It supports 100A/150A modular configurations for 220V/380V systems, achieving ≥95% harmonic filtering from 2nd to 50th harmonics, with 3× neutral current compensation capability and Class A EMC compliance. Designed for industrial power systems, it effectively reduces harmonic distortion, improves electrical stability, and protects sensitive equipment.
Application scenarios: industrial manufacturing, data centers, semiconductor facilities, commercial buildings, renewable energy systems, and other applications requiring reliable power quality management.
•Reduce Harmonic Distortion: Achieves ≥95% filtering performance across 2nd–50th harmonics with a response time of <40ms for improved power quality.
•Handle Complex Industrial Loads: Provides up to 3× phase current neutral filtering capability for systems with heavy zero-sequence current.
•Ensure Stable System Operation: Designed with Class A EMC compliance to minimize electromagnetic interference in demanding environments.
•Scalable Power Quality Solution: Supports 100A/150A modules, AC220V/380V systems, and flexible parallel connection for different capacity requirements.
•Adapt to Different Power Issues: Offers selectable compensation modes for harmonic correction or harmonic + unbalance correction, achieving ≤5% residual imbalance.
Product Features
Overview
Working Principle of the High-configuration Model Active Power Filter (GY-AHF-PLUS):
The device connects a voltage source converter (VSC) to the power grid via a filter in parallel. By detecting the load current in real time, it separates the harmonic currents sequentially based on a specific-order harmonic current detection algorithm. According to the set filtering percentage, it generates control signals to drive the IGBT to output a compensation current that has the same amplitude as but opposite phase to the load harmonic current, thereby achieving harmonic compensation. In addition, the device’s neutral line zero-sequence current filtering capability can reach three times the phase line current. It also offers better EMC electromagnetic compatibility performance and improved stability.
Performance characteristics
1.DSP+CPLD full-digital control core, three-level topology technology, advanced harmonic detection algorithm and PWM control strategy.
2.Modular design with multi-module parallel connection capability; small footprint and easy maintenance.
3.Independent air duct and independent board compartment structural design to ensure stable operation of the equipment.
4.Supports 100% current-limiting output to ensure long-term stable operation of the equipment.
5.Supports selectable compensation modes: harmonic compensation only, or harmonic compensation + three-phase unbalance compensation.
6.Unbalance compensation capability: unbalance degree after compensation ≤5%.
7.Current harmonic compensation capability: compensation rate ≥95%; 2nd to 50th harmonics, individual compensation rate adjustable.
8.Neutral line zero-sequence current filtering capacity is three times that of the phase line.
9.EMC (Electromagnetic Compatibility) – Radiated Emission (RE) and Conducted Emission (CE) meet Class A test standard.
Technical Parameter
| Model | 220V | 380V |
| Altitude | <2000m; above 2000 m, derate according to GB/T 3859.2 | |
| Ambient temperature | -10 ~ +50℃ (above 40 ℃, capacity derating ≤30%) | |
| Relative humidity | ≤90% relative humidity, no condensation on the surface at a monthly minimum temperature of 25 ℃ | |
| Pollution degree | Pollution degree ≤ Class III | |
| Operating voltage | AC220V (-20%~+20%) | 380V (-20%~+20%) |
| Operating frequency | 50Hz/60Hz (45Hz~63Hz) | |
| Rated compensation capacity | 100A, 150A | |
| Grid configuration | Three‑phase three‑wire, three‑phase four‑wire | |
| Number of parallel units | unlimited | |
| Overall efficiency | ≥97% | |
| Switching frequency | 16kHz | |
| Function selection | Harmonic compensation, harmonic compensation + three‑phase unbalance compensation | |
| Current harmonic compensation capability | Current harmonic compensation ≥95% | |
| Current harmonic compensation range | 2nd to 50th harmonics, adjustable individual compensation rate | |
| Unbalance compensation capability | Unbalance degree after compensation ≤5% | |
| Full response time | <40ms | |
| Noise level | ≤65dB | |
| Communication method | 2 RS485 communication ports (Wi‑Fi supported) | |
| Protection functions | Overload, software/hardware overcurrent, grid overvoltage/undervoltage, grid voltage unbalance, power supply failure, overtemperature, frequency anomaly, short‑circuit protection, resonance protection, etc. | |
| Overload capability | Rated 1.2 times overload for 60 seconds | |
| Installation method | Rack / Wall‑mounted | |
| Cable entry | Rear cable entry (rack‑mount), top cable entry (wall‑mounted) | |
| Protection rating | IP20 (IP54 customizable) | |
| Neutral line filtering capability | Neutral line filtering capacity is 3 times that of phase filtering capacity | |
| Cooling method | Forced air cooling | |
| Electromagnetic compatibility | EMC (Electromagnetic Compatibility)‑ Radiated Emission (RE) and Conducted Emission (CE) meet Class A test standard | |
User Manual
Frequently Asked Questions About GY-AHF-PLUS High-Spec Active Harmonic Filter
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