GY-AHF-SiC-based Active Harmonic Filter
GY-AHF-SiC is a high-efficiency active harmonic filter based on SiC silicon carbide power devices and DSP+CPLD full-digital three-level control technology. Featuring up to 98.5% peak efficiency and 30kHz high-frequency switching capability, it delivers precise harmonic compensation, harmonic and three-phase unbalance correction, and 3× neutral-line zero-sequence filtering.
With a compact high-density design, EMC Class A compliance, and flexible modular parallel expansion, GY-AHF-SiC is designed for data centers, renewable energy systems, and high-end industrial power quality applications requiring advanced harmonic mitigation performance.
•SiC-Based High Efficiency Design — Built with advanced silicon carbide power devices, achieving up to 98.5% peak efficiency for reduced power losses and improved energy performance.
•Precision Harmonic Mitigation — Provides real-time compensation for 2nd–50th order harmonics with ≥95% compensation rate and <40ms response time.
•Compact High-Density Architecture — Supports up to 8 modules per cabinet with a maximum compensation capacity of 1200A, enabling space-saving installation and flexible system expansion.
•Enhanced Zero-Sequence Current Compensation — Delivers neutral line filtering capability up to 3× phase line current for improved performance under complex load conditions.
•Industrial EMC Reliability — Designed to meet Class A EMC requirements through RE and CE compliance testing, ensuring stable operation in demanding environments.
Product Features
Overview
Silicon Carbide Active Power Filter (GY-AHF-SiC)
Using silicon carbide (SiC) power devices as the core, the GY-AHF-SiC connects a voltage source converter (VSC) to the power grid via a filter in parallel. Its working principle is to detect the load current in real time, separate the harmonic currents sequentially based on a specific-order harmonic current detection algorithm, and generate control signals according to the set filtering percentage. These signals 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 achieves a peak efficiency of over 98.5%. A single cabinet can accommodate up to 8 modules, with a maximum capacity of 1200A, offering easy installation and maintenance.
Performance characteristics
1.DSP+CPLD full-digital control core, three-level topology technology, advanced harmonic detection algorithm and PWM control strategy.
2.Reduced module losses, improved module efficiency, peak efficiency up to 98.5% or higher.
3.High power density modular design; a single cabinet can accommodate 8 modules with a maximum capacity of 1200A, easy installation and maintenance.
4.Higher switching frequency control algorithm reduces output ripple current and improves dynamic response speed.
5.Utilizes the higher voltage withstand capability of SiC power devices while simplifying thermal design and electromagnetic compatibility (EMC) design, enhancing product reliability.
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.Supports 100% current-limiting output to ensure long-term stable operation of the equipment.
10.Supports selectable compensation modes: harmonic compensation only, or harmonic compensation + three-phase unbalance compensation.
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 | 30kHz | |
| 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-SiC Active Harmonic Filter
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