Low-voltage dynamic hybrid harmonic reactive power compensation device

Abstract

The invention relates to a low-voltage dynamic hybrid harmonic reactive power compensation device which is in parallel connection with a power grid and is further connected with a load. The low-voltage dynamic hybrid harmonic reactive power compensation device comprises a filter capacitor circuit, a thyristor control electric reactor circuit and a control circuit, wherein the filter capacitor circuit and the thyristor control electric reactor circuit are respectively connected to the power grid in parallel, the control circuit is connected with the thyristor control electric reactor circuit and the load respectively, the filter capacitor circuit offsets induction reactive currents in the power grid in real time, the control circuit tracks the reactive need of the load in real time, the triggering moment of a thyristor in the thyristor control electric reactor circuit is controlled, the size of currents in the thyristor control electric reactor circuit is changed, and reactive currents of the power grid are compensated. Compared with the prior art, the low-voltage dynamic hybrid harmonic reactive power compensation device has the advantages of being low in cost, rapid in response, capable of saving energy, obvious in voltage stabilization effect and the like.

Description

technical field [0001] The invention relates to a device for compensating harmonics and reactive power, in particular to a low-voltage dynamic hybrid harmonic reactive power compensation device. Background technique [0002] With the development of modern industry and the improvement of people's living standards, the requirements for power quality are getting higher and higher. Therefore, continuously improving the quality of power supply has become an urgent task for the power sector. Reactive power balance and harmonic content are two important indicators to measure the economic operation of power system. [0003] Harmonic sources in the power grid are roughly divided into two types: one is various power electronic equipment containing semiconductor components, such as various rectifiers, inverters and thyristor controllable switching equipment, etc., which are opened and closed according to certain rules. Circuits, which inject harmonic currents into the grid; the other...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a fast and continuous two-way adjustment of inductive and capacitive reactive power in order to overcome the defects of high cost and slow response in the above-mentioned prior art, and realize three-phase load asymmetry and reactive power and Harmonic comprehensive compensation, low-voltage dynamic hybrid harmonic reactive power compensation device with obvious energy saving and voltage stabilization effects

Images