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Harmonic suppression circuit for electromagnetic compatibility laboratory and compensation method thereof

A harmonic suppression and electromagnetic compatibility technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, reactive power adjustment/elimination/compensation, etc. The voltage rise at the load inlet and the poor reliability of the measurement results can limit the closing inrush current and operating overvoltage, improve the voltage waveform, and improve the reliability and accuracy.

Active Publication Date: 2015-04-01
潘奇 +4
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the course of the experiment, it was found that only using series-type power active filters still cannot effectively suppress high-order harmonics, causing the voltage at the entrance of various loads to rise, resulting in large measurement errors and poor reliability of measurement results

Method used

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  • Harmonic suppression circuit for electromagnetic compatibility laboratory and compensation method thereof
  • Harmonic suppression circuit for electromagnetic compatibility laboratory and compensation method thereof
  • Harmonic suppression circuit for electromagnetic compatibility laboratory and compensation method thereof

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Embodiment Construction

[0026] In order to make the technical solution of the present invention clearer, the implementation of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the harmonic suppression circuit of the electromagnetic compatibility laboratory of Embodiment 1 of the present invention includes: a first-stage series active power filter 1, whose input point is connected to the voltage output terminal of the AC power supply Us; The source power filter 2, its input point is connected to the output point of the first stage series active power filter 1, and its output point is connected to the power supply terminal of the load.

[0028] In order to solve the problems existing in the prior art, the harmonic suppression circuit of the electromagnetic compatibility laboratory also includes: a dry-type iron core reactor 3 connected in parallel at the output point of the second-stage series active power filter 2,...

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Abstract

The invention belongs to the technical field of harmonic treatment, and provides a harmonic suppression circuit for an electromagnetic compatibility laboratory and a compensation method thereof. The circuit and the method thereof adopt two-stage tandem type active power filters connected in series in the forward direction, and a dry-type iron core reactor is connected in parallel between the tandem type active power filters and the power source end of a load. The dry-type iron core reactor is mainly used for restraining high-frequency interference with a frequency higher than 10 KHz, cannot influence the filter performance of the tandem type active power filters, is the major support equipment of a reactive compensation device in an electric system, can effectively restrain higher harmonic, limits the switching-on flashy current and switching overvoltage, improves the voltage waveform of the system, increases the power factor, and plays a greater function for the safe operation of a power capacitor and other electric equipment. Therefore, the dry-type iron core reactor connected in parallel connection guarantees the safe operation of other equipment in the electromagnetic compatibility laboratory, voltage change of inlets of all loads can be compensated, the detection reliability and accuracy in electromagnetic compatibility of the product can be improved.

Description

technical field [0001] The invention belongs to the technical field of harmonic processing, in particular to a harmonic suppression circuit of an electromagnetic compatibility laboratory and a method for compensating the voltage rise phenomenon of the harmonic suppression circuit at a load entrance. Background technique [0002] With the establishment and enforcement of more and more electromagnetic compatibility standards, the electromagnetic compatibility of electrical and electronic products has been paid more and more attention. In different industries, electromagnetic compatibility laboratories for different products have been introduced to ensure that the products safe operation. [0003] In the field of power grid construction, with the advancement of smart grids, smart meters are gradually replacing traditional meters. If the electromagnetic compatibility of smart meters is poor, it will cause serious problems such as misoperation, refusal to move, and inaccurate mea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/40Y02E40/22Y02E40/20
Inventor 潘奇李晓平张远余少宁周锡忠
Owner 潘奇
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