SNA-SVG is a static var generator (SVG) designed to compensate in real time for reactive power consumed or generated by inductive and capacitive loads. It is suitable for rapidly changing loads, such as resistance welding systems, arc furnaces, refrigeration equipment and air compressors, as well as networks with high harmonic distortion. Using high-performance IGBTs in a three-level topology, the SVG measures load current through current transformers (CTs), calculates the required compensation with a DSP-based control algorithm and generates bidirectional compensation current through PWM-controlled switching. In addition to improving power factor, it supports voltage stability, harmonic mitigation and load balancing.
Static Var Generator Advantages:
● Harmonic compensation up to the 51st order
● Load balancing between phases and neutral
● Compact design, three-level topology
● Expandable up to 12 modules in parallel
● User-friendly 4-inch, 7-inch and 10-inch HMI options
● Silent operation: ≤ 65 dB(A)
● Optional RS485/Ethernet communication
Static Var Generator Applications:
· Special compensation for large loads: SVG is particularly suitable for special compensation of large loads, such as rolling mills, electric arc furnaces, and electrified railway traction stations in steel production. These devices consume a lot of energy and have a significant impact and adverse effects on the power grid. SVG can quickly respond and dynamically compensate for the reactive power required by these loads, thereby improving power factor and optimizing power quality.
· Large industrial users: High energy-consuming industrial loads, such as metallurgy, petrochemicals, etc., usually form their own power systems and are interconnected with the public power grid. The power supply department has technical constraints on these users, especially power factor. The application of SVG can help these large industrial users improve power factor, reduce electricity expenses, and improve the power quality of the grid.
· Power system substations: With the expansion of power grid scale and the complexity of network structure, the demand for dynamic reactive power compensation with fast response in substations has increased. SVG can quickly absorb or emit the required reactive power, improve the transmission capacity and stability of substations, and ensure the safe operation of the power grid.
· Hybrid compensation of harmonics and reactive power: Many large-capacity industrial loads require both reactive power compensation to improve power factor and harmonic control. SVG can not only dynamically compensate for reactive power for loads, but also simultaneously control harmonics, improve the power quality of the power grid, and enhance equipment operating efficiency.
Where Can a Static Var Generator Be Used?
| Application | Typical Loads | Main Requirement |
|---|
| Manufacturing plants | Motors, VFDs and welding machines | Dynamic power factor correction |
| Steel and metallurgy | Rolling mills and arc furnaces | Fast reactive power compensation |
| Mining facilities | Crushers, conveyors and hoists | Voltage stability and load balancing |
| Commercial buildings | HVAC, elevators and pumps | Reduced reactive power demand |
| Data centers | UPS and cooling systems | Stable power factor and voltage |
| Hospitals | MRI, CT, X-ray and HVAC systems | Stable supply for sensitive loads |
| EV charging stations | High-power chargers | Compensation for rapid load changes |
| Renewable energy | Solar and wind systems | Bidirectional reactive power support |
| Ports and cranes | Lifting and drive systems | Rapid compensation and flicker reduction |
| Water treatment | Pumps and variable-speed drives | Improved system efficiency |
SVG or Capacitor Bank: Which One Should You Choose?
| Selection Factor | Static Var Generator | Capacitor Bank |
|---|
| Load condition | Rapidly changing loads | Stable and predictable loads |
| Compensation output | Continuous and stepless | Fixed compensation steps |
| Response speed | Millisecond-level | Depends on the switching method |
| Inductive compensation | Yes | Normally no |
| Capacitive compensation | Yes | Yes |
| Overcompensation risk | Low with correct control | Higher under changing loads |
| Phase-load balancing | Available | Not normally available |
| Expansion | Modular parallel expansion | Additional capacitor steps required |
| Initial investment | Higher | Lower |
| Recommended use | Complex or fluctuating systems | Basic power factor correction |
For stable base reactive power demand, a capacitor bank may provide a cost-effective solution. For rapidly changing loads, precise power factor correction, or leading and lagging reactive power conditions, an SVG is usually more suitable. Sinava Power can also configure a hybrid compensation system combining capacitor banks and SVG modules.
Why Choose Sinava as Your SVG Supplier?
Modern electrical systems face increasing demands for stability, efficiency and compliance with stringent power quality standards. Sinava provides static var generator (SVG) solutions for power factor correction, voltage stabilization and grid support.
Our SVG systems use advanced IGBT technology and real-time digital control to provide dynamic, bidirectional reactive power compensation for complex and fluctuating load environments.
Since 1985, we have provided customized SVG products and power quality solutions for industrial, commercial and renewable-energy applications. Our solutions are designed to be scalable and user-friendly.
Is Your Electrical System Experiencing These Problems?
A static var generator may be suitable for your project when:
Power factor changes significantly during production.
Utility power factor penalties remain high.
Capacitor banks switch frequently or cannot follow load changes.
Both inductive and capacitive reactive power occur.
Voltage fluctuates when large equipment starts or stops.
Welding machines, compressors, cranes, VFDs or furnaces create rapidly changing loads.
Three-phase current is unbalanced.
Existing compensation equipment has insufficient capacity.
More electrical loads will be added in the future.
Limited installation space requires a modular compensation system.
Not sure whether an SVG, capacitor bank or hybrid compensation system is more suitable? Send us your electrical data for a preliminary review.
