Product Details
SVG Static Var Generator | Power Quality Equipment for Power Factor Improvement, Harmonic Mitigation and Voltage Flicker Control
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SVG Static Var Generator | Power Quality Equipment for Power Factor Improvement, Harmonic Mitigation and Voltage Flicker Control
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High Voltage Cascaded SVG Static Var Generator Dynamic Reactive Power Compensation | Harmonic Mitigation | Load Unbalance Compensation | Flicker Suppression |
Product cabinet, valve chain, power module array and test platform
This product is designed for substations, renewable energy plants, steel and metallurgy facilities, electric arc furnaces, submerged arc furnaces, electrified railways, metro systems, chemical plants and port power systems. Through fast dynamic compensation and closed-loop control, it helps improve power factor, stabilize bus voltage, suppress harmonic current, correct three-phase unbalance and reduce voltage flicker.
01 Product Value
Multi-function Power Quality Device Integrated dynamic reactive power compensation, harmonic mitigation, load unbalance compensation and flicker suppression for complex power quality applications. | Fast Dynamic Response The reactive current response can be within 5 ms. Some configurations can achieve response below 2 ms for impact load applications. |
High Operating Reliability Cascaded power modules support automatic redundancy. A faulty module can be bypassed to reduce the influence of single-module failure. | Remote Operation and Maintenance Local and remote monitoring are supported for fault diagnosis, operating record tracking and maintenance management. |
02 Core Parameters
| Item | Parameter Range | Description |
| Voltage level | 3 kV, 6 kV, 10 kV, 27.5 kV and 35 kV | For medium and high voltage distribution, traction power supply, renewable energy interconnection and industrial bus systems. |
| Capacity range | 500 kVA to 200 MVA | Can be customized according to reactive power demand, harmonic index, load impact level and grid connection conditions. |
| Compensation targets | Dynamic reactive power, harmonic current, negative sequence current and load unbalance | Suitable for EAF, rolling mill, induction furnace, rectifier loads and large variable-frequency drive systems. |
| Harmonic capability | 2nd to 25th harmonic current filtering | The filtering rate of individual 5th to 13th harmonics can reach up to 95%. |
| Response speed | Dynamic reactive response within 5 ms. Some configurations below 2 ms | Suitable for impact loads and applications with significant voltage flicker. |
| Redundancy | 10 kV systems can support N-1, N-2 and N-3 redundancy. 35 kV systems can support N-1 to N-4 redundancy | The system can continue operating when a module fault occurs, improving commissioning success rate and long-term reliability. |
03 Typical Applications
Transmission, renewable energy, metallurgical impact loads, rail transit and industrial users
Transmission and Substations Improve voltage stability, optimize regional reactive voltage control and reduce frequent capacitor and reactor switching. | Wind and Solar Plants Provide voltage, reactive power and power factor control to improve power quality at the grid connection point. |
Metallurgy, EAF and Furnaces Provide comprehensive treatment for dynamic reactive power, unbalanced load, harmonic current and voltage flicker. | Rail Transit, Chemical Plants and Ports Improve power factor and harmonic problems, reducing equipment heating, losses and nuisance tripping risks. |
04 Key Functions
Function 1: Power module redundancy for continuous operation
A cascaded SVG is composed of many power modules connected in series. In a traditional scheme, a single module failure may trip the whole system. This solution uses automatic module bypass and redundancy control. After a faulty module is removed from service, other healthy modules automatically adjust their output to reduce shutdown risk.
Function 2: Closed-loop harmonic current compensation
Rectifier loads, induction furnaces and areas with many variable-frequency drives can produce multiple harmonic currents. The device detects harmonic components flowing into the grid and compensates them through closed-loop control, helping reduce additional losses, resonance risk and equipment malfunction.
Function 3: Three-phase unbalance compensation
In electrified railway, electric arc furnace and electroslag furnace applications, three-phase current unbalance may generate significant negative sequence current. The device can correct unbalanced current and reduce overheating of motors and transformers, while improving supply quality.
Function 4: Voltage flicker suppression
Rolling mills and AC electric arc furnaces generate rapidly fluctuating reactive current, which causes bus voltage flicker. Through fast instantaneous current detection and control, the equipment shortens reactive current response time and reduces the influence on other power users connected to the same bus.
05 Treatment Effect and Waveform Monitoring
Harmonic mitigation, waveform analysis, flicker improvement and on-site test display
1. After reactive power compensation, bus voltage fluctuation can be reduced and power factor can be improved.
2. After harmonic compensation, characteristic harmonic current can be reduced, improving supply quality and equipment operating conditions.
3. After unbalance compensation, negative sequence current can be reduced and three-phase current and voltage can become more balanced.
4. After flicker suppression, the influence of impact loads on other users connected to the same bus can be reduced.
06 Project Selection Guide
| Selection factor | Recommended check points |
| Site voltage level | Confirm the connection voltage, bus structure, short-circuit capacity, wiring method and protection configuration. |
| Load characteristics | Check whether the site has impact loads, periodic fluctuating loads, unbalanced loads or large rectifier equipment. |
| Treatment target | Define whether the key target is power factor improvement, harmonic mitigation, flicker suppression, reactive voltage control or integrated treatment. |
| Capacity design | Calculate capacity based on reactive power shortage, harmonic current, negative sequence current and flicker index. Reserve expansion margin when needed. |
| Operation mode | Confirm the need for remote monitoring, redundant operation, bypass strategy, automatic diagnosis and data logging. |
07 Suitable Users
Substations and Distribution Utilities Projects requiring voltage stabilization, reduced switching of reactive equipment and improved regional power quality. | Renewable Energy Plants Wind, solar and storage plants that need grid-code compliant power factor, voltage support and power quality control. |
Steel and Metallurgy Plants Production lines with EAF, rolling mill or induction furnace loads requiring flicker and harmonic mitigation. | Rail Transit and Industrial Parks Users with many VFD, rectifier and nonlinear loads that require centralized power quality treatment. |
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Address: 902-903, Building 1, Yard 15, Xinya Street, Daxing District, Beijing, China
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