Novel reactive compensation and harmonic suppression device

Abstract

The invention discloses a novel reactive compensation and harmonic suppression device, and the device comprises a passive filter which consists of a fifth-order single-tuned passive filter, a seventh-order single-tuned passive filter and an eleventh-order single-tuned passive filter, wherein the fifth-order single-tuned passive filter, the seventh-order single-tuned passive filter and the eleventh-order single-tuned passive filter are connected in a star shape. The device also comprises a zero sequence power active filter, a hybrid power active filter which filters second-order and fourth-order harmonic waves, an IGBT drive circuit, and a DSP control circuit. The DSP control circuit includes a DSP digital signal processor, an FPGA programmable logic device, an external ADC converter, and aphase locked loop circuit. The passive filter is connected to three phase a, c and c of a low-voltage side of a distribution transformer. The hybrid power active filter is formed by the cascading ofa passive part and an active part. The device achieves the extraction of second-order and fourth-order harmonic current signals from a nonlinear load, enables the second-order and fourth-order harmonic current signals to serve as the control signals of the power active filter, thereby achieving the effective control of the power active filter, and effectively filtering the second-order and fourth-order harmonic currents.

Description

technical field [0001] The invention relates to a reactive power compensation treatment device, in particular to a novel reactive power compensation and harmonic control device. Background technique [0002] With the continuous development of power electronics technology and the wide application of a large number of nonlinear loads, the problem of harmonic pollution in the power grid is becoming more and more serious. Among these loads are not only a large number of single-phase rectifier loads, but also many non-linear loads with very complex harmonic spectrum. Linear load (such as intermediate frequency furnace, etc.). In such a complex harmonic environment, ordinary passive filter technology or active filter technology alone cannot solve the problem of harmonic pollution well. [0003] The hybrid power active filter technology solves this problem very well. For non-zero sequence harmonics above the 5th order, the passive filter can achieve better filtering effect and eff...

AI Technical Summary

Problems solved by technology

In such a complex harmonic environment, ordinary passive filter technology or active filter technology alone cannot solve the problem of harmonic pollution.

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