Test equipment for partial discharge of variable-frequency resonant cable based on optical electric field transducer

A technology of optical electric field and partial discharge, applied in the direction of testing dielectric strength, etc., to avoid misdiagnosis or missed diagnosis, improve the efficiency and accuracy of on-site testing, and the effect of fast waveform response frequency

Active Publication Date: 2014-05-21
GUANGXI POWER GRID ELECTRIC POWER RES INST
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[0004] At present, there is no

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  • Test equipment for partial discharge of variable-frequency resonant cable based on optical electric field transducer

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[0017] The present invention will be further described below in conjunction with the drawings and specific implementation.

[0018] The structure of the frequency conversion resonant cable partial discharge test equipment based on the optical electric field sensor of the present invention is as figure 1 As shown, the device consists of optical electric field sensor 1, high voltage wire 2, variable frequency resonant power supply 3, high voltage optical fiber 4, photoelectric conversion and output device 5, synchronous signal transmission line 6, partial discharge signal transmission line 7, partial discharge test instrument 8, high voltage measurement signal The transmission line 9, the voltage regulation control device 10, the voltage regulation signal transmission line 11, and the sample 12 are constituted.

[0019] The optical electric field sensor 1 can meet the performance requirements of optical detection in a high-voltage environment, and reflect changes in high-voltage elec...

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Abstract

The invention discloses test equipment for partial discharge of a variable-frequency resonant cable based on an optical electric field transducer. The test equipment comprises the optical electric field transducer, a high voltage wire, a variable-frequency resonant power supply, a high voltage optical fiber, a photoelectric conversion and output unit, a synchronous signal transmission wire, a partial discharge signal transmission wire, a partial discharge test instrument, a high voltage measurement signal transmission wire, a voltage regulation control apparatus, a voltage regulation signal transmission wire and a test sample. The test equipment disclosed by the invention has the advantages that: the test equipment emphatically solves the problem in heavy high voltage measurement apparatus and difficulty in acquirement of a synchronous voltage signal in a major network during offline test works of outdoor cable equipment, and fills the blank in acquirement of real synchronous voltage signals; the test equipment is simple and firm in structure, light in weight, small in volume and convenient in operation on a basis that functional requirements are met.

Description

technical field [0001] The invention relates to the working field of electrical performance testing of electric power equipment. Specifically, it is a partial discharge test equipment for variable frequency resonant cables based on optical electric field sensors. Background technique [0002] Currently on the market, the detection methods for partial discharge of cables mainly include acoustic emission method and electromagnetic coupling method. The sensor used in the acoustic emission method is an ultrasonic sensor, but its frequency range is low, which cannot meet the needs of measuring high-frequency partial discharge signals. The sensors used in the electromagnetic coupling method can be divided into capacitive, inductive, and high-frequency sensors. The detection sensitivity of the capacitive strip sensor is restricted by the installation environment, and at the same time, it needs to keep a sufficient distance from the outer shielding layer to ensure that the signal ...

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Application Information

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IPC IPC(8): G01R31/12
Inventor 陈智勇刘聪汉韦魏邓雨荣赵坚李恒灿
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST
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