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Non-contact measurement equipment and method of contact net voltage

A non-contact, measuring equipment technology, applied in the direction of electrostatic field measurement, measuring devices, measuring electrical variables, etc., can solve problems such as large volume, high voltage breakdown, electrical unsafety, etc., and achieve small device size, wide frequency response, High safety effect

Pending Publication Date: 2018-08-03
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Electricity is unsafe, and insulating materials are used to achieve high-voltage electrical insulation. Due to the influence of external environment, manufacturing process, and aging operation, high-voltage breakdown problems are prone to occur;
[0006] (2) Difficult to maintain. Periodic testing is required after installation on vehicles, lines, and detection systems. Due to installation environment and safety requirements, periodic testing is difficult to achieve, and there are many maintenance deficiencies;
[0007] (3) Large volume and heavy weight. Traditional voltage transformers use a large number of insulating materials. In order to increase the creepage distance, the shed area is large and heavy.
[0008] To sum up, the existing detection methods of traditional voltage transformers can no longer meet the requirements of catenary voltage detection and safe operation.

Method used

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  • Non-contact measurement equipment and method of contact net voltage
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  • Non-contact measurement equipment and method of contact net voltage

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0024] Since the inventor considered the technical problems existing in the prior art, a non-contact voltage measurement scheme for the catenary voltage mainly includes: detecting the high-voltage equipment on the roof of the car and the high-voltage equipment of the EMU (electric locomotive) through the catenary , Analyze the electric field around the catenary, select the area with uniform electric field distribution, and install the non-contact electric field coupling sensor under the condition of ensuring the electrical insulation distance; according to the principle of electric field distrib...

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Abstract

The invention provides non-contact measurement equipment and method of contact net voltage. The equipment comprises a non-contact electric field coupling sensor and a data acquisition and analysis device, wherein the non-contact electric field coupling sensor comprises vehicle top high voltage equipment and which is arranged on electrical locomotive high voltage equipment or a contact net detection vehicle and an electric field distribution uniform area which is arranged around a contact net line, and the non-contact electric field coupling sensor is used for conducting coupling sensing on anelectric field strength signal in the electric field distribution uniform area; the data acquisition and analysis device is connected with the non-contact electric field coupling sensor and is used for receiving the electric field strength signal subjected to coupling sensing by the non-contact electrical field coupling sensor, and determining the contact net voltage according to the electric field strength signal and the relation of the electric field strength signal and voltage. By means of the non-contact measurement equipment and method of the contact net voltage, the efficiency, safety and convenience of detection and maintenance of the contact net voltage are improved.

Description

technical field [0001] The invention relates to the technical field of electrified railway catenary detection, in particular to a non-contact measuring device and method for catenary voltage. Background technique [0002] The catenary voltage is an important indicator of the capacity of the electrified railway traction power supply system. If the catenary voltage is too high, it will affect the electrical insulation performance; if the catenary voltage is too low, the load equipment will not work normally; the harmonic components in the catenary voltage will affect the stability of the traction power supply system And operation quality, so catenary voltage is an important technical indicator. [0003] At present, the voltage transformers traditionally used in electrified railways include electromagnetic voltage transformers (PT) and capacitive voltage transformers (CVT). Large volume, heavy weight, and high insulation requirements are not conducive to maintenance. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R29/12
CPCG01R19/00G01R29/12
Inventor 杨志鹏张文轩李向东盛良王婧王燕国周威汪海瑛李艳龙
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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