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Multi-harmonic passive filter structure

A power filter and specific harmonic technology, which is applied in the field of new multi-harmonic passive filter structure, can solve the problems of accurate filtering of specific harmonics, complex harmonic components, etc., and achieves easy maintenance and circuit expansion. Simple structure and obvious effect

Inactive Publication Date: 2019-08-09
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the above technical problems, and then provide a new multi-harmonic passive filter structure, the circuit expansion structure is simple, high practicability, used to improve the complex After the harmonic analysis of the circuit, a reactor and a capacitor are used in series to form a specific harmonic filter branch, and a variety of specific harmonic filter branches are connected in parallel to form a filter circuit group, which can be used for multiple times Harmonics are filtered, and the filter circuit group solves the problem of multiple harmonics generated by nonlinear loads

Method used

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  • Multi-harmonic passive filter structure

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Embodiment Construction

[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0012] Specific implementation method: combine figure 1 This method is described as a new multi-harmonic passive filter structure, which includes a power supply 1 , a balance reactor 2 , a capacitor 3 , a reactor 4 , and a load 5 .

[0013] The specific connection method of this structure is: balanced reactor 2, which is a reactor with mutual inductance, and the mutual inductance of the reactor is connected to the same terminal. The circuit harmonic debugging provides convenient conditions, and also compensates for the voltage drop. The reactor 4 and the corresponding capacitor 3 are connected in series to form a filter branch of a specific harmonic order, and a variety of specific harmonic filter branches are connected in parallel to form a filter circuit group, which can filter multiple harmonics, and the filter branch presents low resistance after resonan...

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Abstract

The invention relates to a passive power filter structure, which is composed of a power supply, a balance reactor, a capacitor, a reactor and a load. A filter branch of a specific harmonic order is formed by resonance analysis and calculation of the inductance value of a specific reactor and the capacitance value of a corresponding capacitor. The order of high harmonic can be checked out by harmonic detection. A variety of specific harmonic filter branches are connected in parallel to form a filter circuit group, which can filter multiple harmonics. The problem of multiple harmonics generatedby a nonlinear load is solved. The roles of the balance reactor are to reduce the difficulty of tuning and compensate for voltage drop. The structure has the characteristics of high safety, long service life and convenient operation. The balance reactor also plays a role in power compensation.

Description

technical field [0001] The invention relates to the technical field of electric power passive filters, in particular to a novel multi-harmonic passive filter structure. Background technique [0002] In order to ensure the reliable and normal operation of the power system and improve the stability and power quality of the power system, it is necessary to control the harmonics of the power grid. Due to the rapid development of power electronics technology and its wide application in power systems, transportation, industrial equipment and family life since the 1970s, the harm of harmonics has become increasingly serious. Harmonics will reduce the efficiency of electric energy generation, transmission, and use. Harmonics cause distortion of the voltage and current waveforms in the power system, and harmonic voltages and harmonic currents of the same frequency will generate active power of the same harmonics. The loss of power and reactive power not only leads to the reduction o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 秦明旭朱东柏李建镇杨鹏刘通张恒友李莎
Owner HARBIN UNIV OF SCI & TECH
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