Static Var Generator (SVG)
Working Principle of Static Var Generator (SVG)
The Static Var Generator (SVG) works by paralleling a self-commutated bridge circuit with an inductor directly to the power grid. It adjusts the aand amplitude of the voltage output on the AC side of the bridge circuit or directly controls the AC side current, thereby achieving dynamic reactive power compensation. The LSTSVG series products can effectively resolve issues such as large reactive power impacts, low power factor, and significant current harmonics.
The Advanced Static Var Generator (ASVG) uses external current transformers to monitor the load current in real time. After the DSP chip computes and analyzes the reactive power components and harmonics of the load current, the system drives IGBTs with PWM signals to generate the required reactive power and low-order harmonic currents. This improves the power factor and mitigates harmonics. The LSTASVG series products not only provide reactive power compensation but also eliminate 2rd to 50th-order harmonics in the system.
Main Features
- Faster Response Speed: Response Time: ≤3ms
- Flexible Application Conditions
- Diverse Compensation Functions:
Reactive power compensation for the load.
Harmonic compensation for the load. Compensation for load imbalance.
Simultaneous compensation for load reactive power, harmonics, and imbalance. - Extremely Low Harmonic Content
- Multiple Protection Functions:
Overvoltage/undervoltage protection.
Phase failure protection.
Overcurrent protection for the device.
DC bus overvoltage/undervoltage protection.
Overload automatic current-limiting protection. - Voltage Regulation
Applications
Widely used in rectifiers, converters, chargers, welding equipment, UPS systems, and other nonlinear load applications requiring harmonic mitigation and power quality improvement.
Technical Data
- Module Unit Capacity: 35, 50, 75, 100, 150kvar
- System Operating Voltage: 220VAC/400VAC/480VAC/690VAC
- Rated Frequency: 45~63Hz
Wiring Method: Three-phase three-wire / Three-phase four-wire - Harmonic Compensation Rate: ≥97% within rated capacity (Load distortion rate ≥20%)
- Compensation Function: Capable of harmonic, reactive power, and three-phase imbalance compensation, among other functions
- Compensation Mode: Primarily reactive power compensation, with harmonic compensation as an optional feature
- Electronic Topology: Three-level
- Response Time: Reactive power compensation <5ms, full compensation <10ms
- Active Power Loss: <2% of rated power module
- Operating Temperature: -20℃ ~ 50℃
- Storage Temperature: -20℃ ~ 65℃
- Relative Humidity: <90% (at 25℃)
- Noise: <55dB
- Communication Interface: RS485/RS232/Ethernet communication functionality/USB2.0/GPRS
- Communication Protocol: Modbus Protocol
- Operation Display: LCD monitoring panel, operating parameter settings, touch button operation, multi-parameter display
- Cooling Method: Intelligent air cooling