Static Var Generator

SNA-SVG is a static reactive power generator (SVG) designed to compensate for reactive energy consumed or generated in real-time by inductive or capacitive loads. It's the ideal solution for power factor correction in applications where the load varies rapidly (such as resistance welding, arc furnaces, refrigeration or compressed air compressors, etc.) or in networks heavily polluted by harmonics. It is designed with state-of-the-art technology based on high-performance IGBTs under a 3-level topology, It acquires the current signal of the load by the CT, the DSP tracks the command current quickly and calculates the reactive power rate of change by the intelligent algorithm to send the data to the IGBT by PWM signal. Finally, the inductive or conductive power compensation current is generated on the inverter to achieve the real-time dynamic reactive power compensation. In addition to improving power factor, it provides energy quality solutions such as harmonic elimination and load balancing.

Static Var Generator Advantages:

● Harmonic compensation up to the 51th order

● Load balancing between phases and neutral

● Compact design, three-level topology

● Expandable up to 12 modules in parallel

● 4inch/7inch/10inch simple and user-friendly HMI

● Silent operation ≤65dB(A)

● RS485/Ethernet communication optional

Static Var Generator Application:

· 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.

· Substation of power system: 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 of loads, but also simultaneously control harmonics, improve the power quality of the power grid, and enhance equipment operating efficiency.

FAQs About SVG Static Var Generator

Q1: What is a Static Var Generator (SVG)?

A Static Var Generator (SVG) is a power quality device for dynamic reactive power compensation. It helps stabilize voltage levels and improve power factor by injecting or absorbing reactive power as needed. Unlike traditional capacitor banks, SVG provides real-time compensation and works effectively under varying load conditions.

Q2: How do you select a Static Var Generator?

When choosing an SVG, consider the following factors:

-Reactive power demand: Determine the required kVAR rating based on the power system’s reactive power needs.

-Load type: Suitable for industries with fluctuating reactive power demands, such as welding, data centers, and steel plants.

-Response time: Look for fast response times (typically <5ms) for handling dynamic loads.

-System voltage and capacity: Ensure compatibility with the existing electrical infrastructure.

-Installation environment: Consider indoor or outdoor installations and environmental factors like temperature and humidity.

Q3: What is the difference between a Static Var Generator and a Capacitor Bank?

SVG: Uses advanced power electronics (IGBT-based technology) for real-time reactive power compensation, providing continuous, stepless control.

Capacitor Bank: Uses fixed or switched capacitors to compensate for reactive power in discrete steps, which may lead to overcompensation or undercompensation.

Q4: What is the difference between an SVG (Static Var Generator) and an AHF (Active Harmonic Filter)?

SVG is ideal for voltage stability and reactive power control.

AHF is better for harmonic-rich environments and power quality improvement.

For complete power quality solutions, SVG and AHF can be used together in complex electrical systems.

Q5: Is SVG suitable for all types of loads?

SVG is ideal for dynamic loads that require reactive power compensation and power factor correction, including:

Welding equipment (arc welding machines, resistance welding machines)

Elevators, cranes (rapidly changing loads)

Renewable energy systems (wind power, solar PV)

Industrial applications (steel, chemical, cement industries)

Data centers, hospitals, and airports (high power quality requirements)
However, SVG has limited effects on pure resistive loads (e.g., electric heaters).

Q6: Will SVG conflict with AHF (Active Harmonic Filter)?

No, SVG and AHF can work together to improve overall power quality:

SVG focuses on reactive power compensation and power factor improvement.

AHF eliminates harmonics and reduces Total Harmonic Distortion (THD).

Using both in combination is ideal for environments with nonlinear loads such as VFDs, UPS, and electric arc furnaces.

Why Choose Us?

● SINAVA is a professional power quality solution, research and development, and design manufacturer.

● Excellent teamwork from pre-sales to after-sales that can support you with fast, reliable service.

● Top-grade components and a strict QC control system are offered.

● Factory stock, fast dispatch and multi-overseas shipping support.

● TUV CE-approved test item based on IEC 61000 AND IEC 62477 series standards.