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Fundamental wave magnetic flux tuning passive filter and harmonic wave extraction device

A technology of harmonic extraction and fundamental wave magnetic flux, which is applied in harmonic reduction devices and AC networks to reduce harmonics/ripples, etc. It can solve the problems of equipment or circuits that have a great influence on filtering performance and eliminate harmonics. The problem of poor wave elimination effect, etc., achieves the effect of good extraction effect, simple structure and energy saving.

Inactive Publication Date: 2012-07-18
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the filtering performance of the passive filtering method is greatly affected by system parameters and the external environment, the filtering effect is poor
[0004] It can be seen that in the prior art, the equipment or circuit for eliminating harmonics is relatively complicated, the effect of harmonic elimination is poor, and energy is wasted

Method used

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  • Fundamental wave magnetic flux tuning passive filter and harmonic wave extraction device
  • Fundamental wave magnetic flux tuning passive filter and harmonic wave extraction device
  • Fundamental wave magnetic flux tuning passive filter and harmonic wave extraction device

Examples

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Effect test

Embodiment 1

[0051] Example 1 Figure 10 It is a schematic diagram of the composition structure of the first embodiment of the present invention. like Figure 10 As shown, in a single-phase power supply system, the first embodiment of the present invention includes a single-phase AC power supply, a group of three-winding transformers, a tuning module, a harmonic rectifier circuit, a filter circuit and a load harmonic source. The quality factor Q of the resonant circuit in the tuning module is greater than 100, so that the harmonic current can be suppressed more effectively. In order to ensure the filtering effect, in addition to satisfying the rated power and rated voltage conditions of the transformer module, the ratio of the transformer excitation impedance in the transformer module to the leakage impedance of the primary coil should be greater than 100, and the transformer excitation impedance Rm=15~25pu, Lm=15 ~25pu, the ratio of the n-th harmonic excitation impedance to the fundamen...

Embodiment 2

[0052] Embodiment 2 Figure 11 It is a schematic diagram of the composition structure of the second embodiment of the present invention. like Figure 11 As shown, in a three-phase power supply system, the second embodiment of the present invention includes a three-phase AC power supply, three groups of three-winding transformers, three tuning modules, a three-phase harmonic rectifier circuit composed of three harmonic rectifier circuits, a Filter circuit and on-load harmonic source; wherein, the three-phase AC power supply is in star connection; the three windings of the three-winding transformer are the main coil of the primary side, the harmonic extraction coil and the tuning coil of the secondary side; One end of the three main coils in the three groups of three-winding transformers is respectively connected to the three-phase AC power supply, and the other end is connected to the load harmonic source; the three tuning coils in the three groups of three-winding transformer...

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Abstract

The invention provides a fundamental wave magnetic flux tuning passive filter and harmonic extraction device which comprises an alternating-current power supply, a harmonic filtering and extraction unit and a load harmonic source, wherein the alternating-current power supply is used for transmitting a generated fundamental wave signal to the harmonic filtering and extraction unit; the harmonic filtering and extraction unit is used for transmitting the fundamental wave signal to the load harmonic source in a tuning manner without attenuation; meanwhile, an extracted harmonic signal is subjected to harmonic rectification and filtering treatment in a tuning manner to obtain a direct-current signal; the load harmonic source is used for providing the fundamental wave signal subjected to harmonic source rectification to a load; and meanwhile, the generated harmonic wave signal is returned to the harmonic filtering and extraction unit. The fundamental wave magnetic flux tuning passive filter and harmonic extraction device has the characteristics of simple structure, better harmonic filtering effect, energy conservation and the like and can be widely applied to the field of accurate equipment control.

Description

technical field [0001] The invention relates to harmonic extraction technology, in particular to a fundamental wave magnetic flux tuning passive filter and harmonic extraction device. Background technique [0002] figure 1 It is a schematic diagram of the composition and structure of a system for realizing precise control of power supply output through power supply voltage conversion in the prior art. like figure 1 As shown in the figure, in the application where the power output accurately controls other equipment through the power supply voltage conversion, the AC power supply outputs the ideal fundamental wave signal, but the harmonic source of the voltage conversion pollutes the ideal fundamental wave signal, which makes the ideal fundamental wave in the transmission line. The wave signal is deformed due to the superposition of harmonic signals of various frequencies, that is, it pollutes the AC power supply, thereby affecting the normal operation of other loads; it ca...

Claims

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Application Information

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IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 韩素敏张伟谢东垒杨晓邦张蛟龙
Owner HENAN POLYTECHNIC UNIV
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