3 Wire Electric Indoor Static Var Generator

The operational principle of the Static Var Generator (SVG) involves connecting a voltage-type inverter to the power grid in parallel through a filter, enabling the adjustment of the amplitude and phase of the AC output voltage. This dynamic and accurate compensation for reactive power within the power grid system is achieved with an instantaneous response time of less than 50 microseconds and a full response time of less than 10 milliseconds, effectively preventing overcompensation and undercompensation. Currently, SVG stands as the most effective solution in the field of reactive power compensation.

Conventional capacitance compensators are affected by grid voltage. The traditional capacitance compensator is essentially a capacitor bank or reactor bank controlled by thyristor, whose output capacity is greatly affected by voltage. When the voltage is reduced, its output performance is greatly reduced, and it is easy to resonate with the system impedance, affecting the safe operation of the system. But SVG is not affected by grid voltage. SVG can be equivalent to a controlled current or voltage source, its output characteristics will not be affected by the grid, and at the same time, it will not affect the system impedance.

The safety performance of traditional capacitance compensator is low. The traditional capacitor compensator uses thyristor switching capacitor and reactor group as the main means of reactive power compensation, which has the risk of harmonic amplification, resulting in safety accidents. When the system voltage fluctuates greatly, the compensation effect is greatly affected and the operation loss is large. SVG has high security performance. SVG does not exist harmonic amplification phenomenon, it is an active compensation device, is a fully controlled device composed of IGBT current source device, to avoid the phenomenon of resonance, the operation safety performance is greatly improved.

• Compensation characteristic

  SVG can achieve continuous and accurate compensation of inductive and capacitive reactive power.Traditional capacitor compensator step compensation, can not achieve accurate compensation.

• Volume

  The traditional capacitive compensator is large in volume, and the reactive power provided by the traditional capacitive compensator mainly comes from the capacitor bank or the reactor bank, and its output current has high harmonic content, so it is necessary to be equipped with a large connection reactance to filter out the high harmonic in the current. SVG is small in size, and the capacitor or reactance on the DC side of SVG is only used as reactive power exchange, which supports the voltage or current but does not participate in actual compensation, so its capacity is far less than the compensation capacity, and the harmonic content in the output current is small, so it only needs small reactance to filter out higher harmonics.
  

• Output current harmonic content

  Traditional capacitance compensator has high harmonic content. The output current of traditional capacitor compensator usually contains more harmonics, and it is often needed to be used with passive or active power filters to reduce harmonic pollution.SVG has low harmonic content. SVG can eliminate the odd harmonics in the output current by multiple, multilevel or cascade technology, so that its output waveform is closer to sine wave.

  

• Improving the power factor of a power system is essential to improve efficiency and reduce costs. The SVG boasts fast response capabilities up to less than 15 milliseconds, dynamic reactivity below 50 microseconds, and comprehensive safety features including overload, overvoltage, and undervoltage protection. These integrated features ensure that electrical systems operate at peak efficiency, maintain stability, and provide a high level of safety and reliability, ultimately leading to significant cost savings and performance improvements.
  

Applications with the need for rapid reactive power compensation, e.g.:

• Data centers, UPS systems

• Green power generation systems

• Industrial production machines

• Office buildings and shopping centers