It is a system designed to operate in 3 different functions:
•Reactive power compensation
•Filtering of harmonics
•Phase balancing

Reactive power compensation is undoubtedly the fundamental feature of an SVG, as it is able to operate where a traditional power factor correction system would not be able to guarantee long-lasting service and reliability.

For example, all applications – mainly in heavy industry – with remarkably high harmonic contents, both in current and in voltage (THDi > 80% and THDv > 15%).

SVG is available in 3 versions: Wall, Rack and Tower.

Principle of operation

SVG collects the load current trends over time in real time, sending them to an internal control circuit, via the use of Current Transformers. Through integrated FPGA technology, the fundamental components of the currents, the harmonic components, the reactive currents, the components responsible for the unbalance are extracted, the currents necessary for compensation and the compensation currents issued by SVG are also compared, and the difference is calculated.

In order to allow the IGTB inverter to be able to inject the necessary currents into the electrical grid, input signals are emitted to the driving circuit, so as to carry out closed-loop control and complete the compensation function.

Features

Quick touch-screen display for viewing network dataCurrent effective values of the load;
• THDi (current harmonic distortion) of the Load;
• Load power factor;
• Active, Reactive, Apparent power required by the load; • Grid-side current and voltage effective values (after Power Factor Correction/Filtering);
• THDi and THDv (Current and Voltage Distortion) on the grid side;
• Grid side power factor;
• Active, Reactive, Apparent power on the grid side.
• Remote visualization through RS232 and RS485 serial port, Modbus protocol.
• The Currents and Reactive Powers injected by the equipment are also monitored

Applications

• Heavy Industry (Metallurgical, Refineries ...)
• Data Center
• Cement plants
• Paper Mills
• Building Automation Systems
• Automotive Industry
• Waste Treatment Systems

How to choose an SVG system

The sizing of an SVG system depends on the type of function to which it will be subjected. In fact, in the case of power factor correction mode, the calculation of the necessary power in kVAr will be the same used for traditional power factor correction panels, while in the case of Active Filter mode the sum of the harmonic currents is required - whether it is a plant or a single load – obtainable through a network analysis. On the other hand, in the case of a combined system, with both power factor correction and harmonic filtering modes, a more in-depth evaluation is advisable, also depending on where the SVG system will be installed.