SVG Cabinet
✅Dynamic reactive power Compensation
✅Harmonic Filtering
✅Voltage Stability
✅Unbalance Correction
✅Flicker Mitigation
- Product Introduction
Our SVG Cabinet is a flexible AC transmission system device based on fully controlled power electronic components (IGBT). It utilizes voltage source converter (VSC) technology and achieves dynamic reactive power compensation through PWM control.
Compared to traditional SVCs, SVG offers faster response, higher precision, and a more compact design, making it a core component in smart grids and modern industrial power quality management.
Working Principle
● SVG generates leading/lagging reactive current by controlling IGBT switching via PWM.
● Uses instantaneous reactive power theory for real-time compensation.
working Flow：
| Subsystem | Key Technical Specifications | Key Components |
|---|---|---|
| Power Unit | Single module capacity: 50-300 kvar | IGBT module |
| DC Support | Capacitor voltage: 800-1500 VDC | Film capacitors |
| Control System | Control cycle ≤ 100 μs | DSP+ FPGA |
| Cooling System | Thermal resistance ≤ 0.05°C/W (water-cooled) | Aluminum heat sink + deionized water circulation |
| Protection System | Response time < 2 ms | Hall sensors + fast-acting fuses |
Use Conditions
| Parameter | Requirements |
|---|---|
| Voltage Level | 400V, 690V, 6kV, 10kV, 35kV |
| Frequency | 50Hz/60Hz (±2%) |
| Ambient Temp. | -25°C to +55°C (derating above 40°C) |
| Humidity | ≤95% (non-condensing) |
| Altitude | ≤1000m (derating above) |
| Installation | Indoor/Outdoor (IP54 for outdoor) |
Key Features
| Feature | Description |
|---|---|
| Fast Response | <10ms dynamic compensation |
| High Precision | Reactive power accuracy ±1% |
| Modular Design | Scalable capacity (50kvar–100Mvar) |
| Low Harmonics | THD <3% (IEEE 519 compliant) |
| Overload Capability | 110% continuous, 150% for 1 min |
| Compact Size | 30% smaller than SVC |
| Cooling Options | Air-cooled (≤2Mvar) / Water-cooled (>2Mvar) |
Main Functions
| Function | Technical Impact |
|---|---|
| Dynamic VAR Compensation | Maintains PF ≥0.99 under fluctuating loads |
| Harmonic Filtering | Reduces 2nd–50th harmonics (per IEEE 519) |
| Voltage Stability | Limits fluctuations to ±2% of nominal |
| Unbalance Correction | Neutralizes <5% current imbalance |
| Flicker Mitigation | Suppresses ΔV <3% for arc furnace/rolling mills |
Advantages vs. Traditional SVC
| Aspect | SVG | SVC (TCR/TSC) |
|---|---|---|
| Response Time | <10ms | 20–40ms |
| Footprint | Compact | Bulky (requires reactors) |
| Harmonics | None generated | TCR produces harmonics |
| Maintenance | Solid-state (low) | Mechanical switches (high) |
| Efficiency | >98.5% | 95–97% |
Typical Applications
● Renewables: PV/wind farms (grid code compliance).
● Industry: Steel mills, mining (flicker suppression).
● Data Centers: PF correction for UPS systems.
● Railways: Traction power quality management.
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