Zhejiang Hongyan Electric Co., Ltd. 
ENGINEERED SOLUTION
Steel & Metallurgy
Power factor correction, harmonic mitigation and voltage support for electric arc furnaces, rolling mills, cranes and high-load metallurgical production lines.
HYTBBD Series Low-Voltage Dynamic Reactive Power Compensation System
The HYTBBD dynamic reactive power compensation system is suitable for industries with large variations in inductive load, such as metallurgy, machinery, mining, building materials, petrochemical, municipal facilities, and other power distribution systems with strong load fluctuation.
Model Code Description
Example: HYTBBDL-0.4-□/□W-P7
| Code | Description |
|---|---|
| P | Reactor |
| H | Harmonic filter branch |
| W | Outdoor cabinet structure |
| □ | Number of capacitor groups |
| □ kvar | Rated reactive compensation capacity |
| 0.4 kV | System voltage level |
| Type 2 | L: Filter compensation / W: Line compensation |
| Type M | Standard type (M), typically omitted |
| Type 1 | J: Static / D: Dynamic |
| HYTBBD | Dynamic reactive power compensation unit |
| P7 | Company code |
Application Fields
The HYTBBD dynamic reactive power compensation system is suitable for industries with large variations in inductive load, such as metallurgy, machinery, mining, building materials, petrochemical, municipal facilities, and other power distribution systems with strong load fluctuation.
Main Functions
- Compensates reactive power demand in real time and improves system power factor
- Enhances transformer and line utilization efficiency, reducing equipment investment
- Reduces power losses in transformers and transmission lines
- Improves overall power quality and voltage stability
- Limits harmonic current to ensure capacitor reliability and extend service life
- Decreases THDv and suppresses harmful harmonic content
- Ensures safe and long-term stable operation especially for high-inductive loads
Performance Features
- High compensation accuracy with fast response
- Modular design: high expansion capability, compact structure, high reliability and cost-efficiency
- Excellent heat dissipation: modular structure with strengthened ventilation channels, ensuring low-temperature operation and longer component lifespan
- Surge resistance and anti-harmonic design
- High operation reliability and low maintenance cost
- Comprehensive protection functions: over-current, over-voltage, under-voltage, short circuit, harmonic overload, capacitor fault, etc.
- Advanced capacitor switching logic providing smooth compensation without shocks
Working Principle
The HYTBBD system adopts advanced control algorithms with real-time sampling of reactive demand.
According to system load variation, the controller intelligently switches capacitor groups using dynamic switching devices.
According to system load variation, the controller intelligently switches capacitor groups using dynamic switching devices.
It suppresses inrush current and harmonic resonance, prevents over-voltage during capacitor engagement, enhances switching smoothness, and significantly reduces capacitor stress during operation.
The optimized switching extends capacitor service life while ensuring the power factor remains within the optimal range.
Technical Specifications
| Item | Specification |
|---|---|
| Rated voltage | AC380V ~ AC1140V ±15% |
| Rated frequency | 50Hz / 60Hz ±4% |
| Target power factor | ≥ 0.95 |
| Rated capacity per group | 15–60 kvar (dynamic switching) |
| Operation mode | Continuous |
| Cabinet installation | Floor-standing |
| Environmental temp. | -10°C ~ +45°C |
| Relative humidity | ≤95%, non-condensing |
| Altitude | ≤4000m (above 2000m derating applies) |
| Protection level | IP30 |
Selection Requirements
To correctly configure the system, please provide:
- System operating parameters: voltage level, load characteristics, target PF
- Existing reactive compensation conditions and harmonic situation
- Transformer rating and load variation pattern
- If harmonic suppression is needed: harmonic content and filtering requirements
- Installation structure and compensation mode (fixed + dynamic if applicable)
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