Non-contact measurement equipment and method of contact net voltage

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]...

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.

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