AHF+SVG Hybrid Var Compensator
The AHF+SVG Hybrid Var Compensator is a comprehensive device that uses high-frequency switching of high-power power electronic devices to transform reactive power. It monitors the current waveform generated by nonlinear loads in the power grid in real time, filters out the fundamental wave component, and inverts the remaining component to achieve the functions of suppressing harmonics and dynamically compensating reactive power. It is a comprehensive solution for power systems.
Product Features
◆ The device features rapid response, real-time monitoring of current waveforms generated by nonlinear loads in the power grid, enabling harmonic suppression and dynamic reactive power compensation.
◆ It can complete the conversion between rated capacitive reactive power and rated inductive reactive power in a very short time, with a response speed fully capable of compensating for impulsive loads.
◆ The device eliminates the possibility of resonance with system impedance, resulting in higher safety.
◆ It employs harmonic current detection technology based on instantaneous reactive power theory to detect harmonic currents in real time.
◆ High-speed DSP detection and calculation ensure accurate and effective harmonic detection and compensation control, while also featuring intelligent monitoring functions. The device offers flexible operation, clearly displaying operating parameters and status, and automatic fault diagnosis, with real-time monitoring via PC.
◆ Multi-functional, it not only manages harmonics but also compensates for reactive power and improves the power factor, enabling the management of specific harmonic orders.
◆ The device utilizes PWM and multi-level technologies, eliminating pollution to the power grid.
◆ The device features a user-friendly interface, is easy to operate and maintain, and features a standard modular design.
Application Scenarios
- ◆ Applications with frequent load changes
- ◆ Applications with high power quality requirements
- ◆ Applications requiring peak compensation for reactive power and harmonics
Data Sheet
| Electrical parameters | |
| Wiring method | Three-phase four-wire |
| Operating voltage | 380V±20% |
| Operating frequency | 50Hz±10% |
| Product specifications | 150kvar~1000kvar |
| Noise | ＜70dB |
| Technical features | |
| Switching devices | SiC Mosfet |
| Heat dissipation methods | Forced air cooling |
| Heat dissipation control | Adaptive fan speed regulation |
| Protection functions | Output overcurrent protection, output current limiting protection, over-temperature protection, DC bus overvoltage protection, AC input undervoltage protection, AC input overvoltage protection, control system fault protection, main circuit component damage and disconnection protection |
| Compensation performance | |
| Reactive power compensation | ＞99% |
| Overall system losses | ＜2% |
| Full response time | ＜5ms |
| Display Interface | |
| Display screen | 7-foot full-color touchscreen (cabinet type) |
| Language | Chinese, English, and customizable languages |
| Battery display | Distortion rate, power factor, power, voltage, current, and other data display |
| Communication interface and protocol type | RS485, Modbus protocol |
| Environmental conditions | |
| Operating temperature | -25℃~+50℃ |
| Relative humidity | <95%, no condensation |
| Altitude | <5000 meters (above 1000 meters, capacity decreases by 1% for every additional 100 meters) |
| Others | |
| Protection level | IP20 rating, other ratings available upon customization. |
| Installation method | Integrated rack-mount design. |
Q&A
Why is reactive power compensation necessary?
Reactive power is not useless power. In AC power supply systems, inductance and capacitance are essential loads, such as ferromagnetic loads like motors and transformers. Without the excitation of inductive reactive power, these devices cannot function properly. For example, a long-distance power transmission line itself is a capacitive load; as long as it is transmitting power, it is equivalent to a capacitor working. Therefore, in AC power supply systems, the existence of reactive power is of paramount importance for energy transmission and exchange; it is indispensable, or rather, the system cannot function properly without reactive power exchange.
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