What is the principle of SVG reactive power compensation device?

SVG static var generator adopts a self-commutating bridge circuit composed of turn-off power electronic devices (IGBT), which is connected in parallel to the power grid through a reactor, so as to properly adjust the amplitude and phase of the output voltage on the AC side of the bridge circuit or directly control its AC side current.

Quickly absorb or release the required reactive power, and realize the purpose of quickly and dynamically adjusting reactive power. As an active compensation device, it can not only track the impact current of the impact load, but also track and compensate the harmonic current.

Extended data

Compensation mode: domestic reactive power compensation devices basically use capacitors for reactive power compensation, and the power factor after compensation is generally around 0.8-0.9. SVG uses power module to compensate reactive power, and the power factor after compensation is generally above 0.98, which is the most advanced power technology in the world.

Compensation time: It takes 200ms for domestic reactive power compensation devices to complete a compensation at the earliest, and SVG can complete a compensation within 5-20ms. Reactive power compensation needs to be completed in an instant. If the compensation time is too long, it will lead to a bad situation that there is no reactive power and no reactive power should come.

Stepless: domestic reactive power compensation devices basically adopt 3- 10 step compensation, and each step is tens of thousands of methods, which can not achieve accurate compensation. SVG can make stepless compensation from 0. 1 thousand method, which completely realizes accurate compensation.

Baidu Encyclopedia-Static Reactive Power Generator