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High voltage XLPE cable and accessory fundamental wave and multi-harmonic wave superposition testing device

A harmonic test and fundamental wave technology, which is applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as aging and shortening of life, improve accuracy and reliability, reduce the number of cascades, and reduce inconsistency sexual effect

Pending Publication Date: 2018-02-09
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that the aging of some traditional high-voltage XLPE cable terminals is significantly aggravated, the life is greatly shortened, and even insulation accidents occur under the action of fundamental wave superposition and multi-harmonic

Method used

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  • High voltage XLPE cable and accessory fundamental wave and multi-harmonic wave superposition testing device

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Embodiment Construction

[0021] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] Such as figure 1 As shown, a high-voltage XLPE cable and its accessories fundamental wave superimposed multi-harmonic test device provided by the present invention includes an AC power supply 1, a fundamental wave superimposed multi-harmonic generating unit 2, a fundamental wave superimposed multi-harmonic control unit 13, Intermediate transformer 3, compensation reactor 4, standard capacitor unit 5, voltage analyzer 6 and test circuit unit 7; AC power supply 1, fundam...

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Abstract

The invention discloses a high voltage XLPE cable and accessory fundamental wave and multi-harmonic wave superposition testing device, and relates to the power cable detection technical field; the high voltage XLPE cable and accessory fundamental wave and multi-harmonic wave superposition testing device comprises an AC power supply, a fundamental wave and multi-harmonic wave superposition generation unit, a fundamental wave and multi-harmonic wave superposition control unit, an intermediate transformer, a compensation reactor, a standard capacitance unit, a voltage analyzer and a test loop unit; the fundamental wave and multi-harmonic wave superposition voltage signals can be simultaneously transmitted; the testing device can precisely control each harmonic wave voltage amplitude and content, can realize fundamental wave voltage and multi-harmonic wave voltage integrated control and output, and can test the insulation performance of the high voltage XLPE cable and accessories under thefundamental wave and multi-harmonic wave superposition voltage effect.

Description

technical field [0001] The invention belongs to the technical field of power cable detection, and in particular relates to a high-voltage XLPE cable and an accessory fundamental wave superposition multi-harmonic test device. Background technique [0002] In recent years, with the rapid development of power grid technology, the continuous increase of diversified electricity demand, and the massive access of intermittent distributed energy resources, the complexity of user-side equipment has increased, and the problem of grid harmonics has become increasingly serious. . At present, there are a large number of high-voltage XLPE cables and their accessories in operation in urban power grids and electric railway traction power supply systems, and cable terminal accidents are the main cause of cable line tripping accidents, and fundamental wave superimposed multi-harmonic sources have a negative effect on the insulation degradation of cable terminals. influence is very obvious. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227G01R31/1272
Inventor 郭金明覃秀君田树军郭丽娟朱时阳黎大健赵坚李婧黄锋
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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