Both AHF and SVG are IGBT-based power electronic devices used to improve power quality, but they focus on different aspects of power quality.
| Feature | AHF (Active Harmonic Filter) | SVG (Static Var Generator) |
|---|---|---|
| Primary Function | Harmonic mitigation (eliminating harmonic currents) | Dynamic reactive power compensation (improving power factor) |
| Compensation Target | Harmonic current, reactive power, unbalance current | Reactive power, unbalance current |
| Core Benefit | Reduces THDi, protects sensitive equipment | Improves power factor, stabilizes voltage |
| Response Speed | Millisecond level (typically < 1ms) | Millisecond level (typically < 5ms) |
| Typical Application | Harmonic-rich environments (e.g., VFDs, UPS, rectifiers) | Environments with large power factor fluctuations (e.g., arc furnaces, wind farms) |
Connection: In complex power systems, AHF and SVG can be used together to form an AHF+SVG Hybrid Solution, achieving comprehensive optimization of both harmonic mitigation and reactive power compensation.
YT Electric’s AHF and SVG products are at the forefront of the industry’s technology, mainly reflected in the following two aspects:
1. Three-Level (3-Level) Topology
YT Electric’s AHF/SVG modules generally adopt the Three-Level (3-Level) Inverter Topology. Compared to the traditional two-level topology, it offers significant advantages:
2. Silicon Carbide (SiC) MOSFET Technology
YT Electric’s Ultra AHF series products are among the first to introduce Silicon Carbide (SiC) MOSFET power devices. The switching frequency of SiC devices can be significantly increased, bringing the following revolutionary benefits:
The installation location should follow the principle of “compensation close to the source” to maximize compensation efficiency.
| Method | Description | Advantage | Applicable Scenarios |
|---|---|---|---|
| Centralized Compensation | Installed at the low-voltage side of the main transformer or the main distribution cabinet’s outgoing end. | Unified management, wide compensation range. | Occasions where harmonic sources are dispersed and overall power quality requirements are high. |
| Local Compensation | Installed near large or main harmonic sources/reactive loads. | Highest compensation efficiency, reduced line losses. | Single high-power harmonic source or reactive load. |
| Hybrid Compensation | A combination of centralized and local compensation. | Balances overall and local optimization. | Complex industrial environments with diverse load types. |
Contact Us
If you have any needs regarding power quality management, product selection, or customized solutions, please feel free to contact YT Electric’s professional technical team.
Email: sales@yt-electric.com
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