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A method and system for detecting partial discharge of an air-core reactor

An air-core reactor and partial discharge technology, which is applied in the direction of instruments, measuring electricity, and measuring devices, can solve the problems of damaging the reactor and increasing the risk of failure, and achieve the effect of avoiding the risk of failure and replacing it comprehensively and reliably

Active Publication Date: 2019-02-15
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the method for testing the insulation status of dry-type air-core reactors is the inter-turn withstand voltage method. However, the inter-turn withstand voltage test is a destructive test, which may damage the reactor, which will increase the risk of failure.

Method used

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  • A method and system for detecting partial discharge of an air-core reactor
  • A method and system for detecting partial discharge of an air-core reactor
  • A method and system for detecting partial discharge of an air-core reactor

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Embodiment

[0024] An embodiment of the present invention provides a detection system for partial discharge of an air-core reactor. The air-core reactor is an inductive high-voltage electrical appliance used for limiting short-circuit current, reactive power compensation, and phase shifting in a power system. Because the magnetic flux forms a loop through the air, it is called an "air-core" reactor.

[0025] combine figure 1 As shown, the detection system includes: a power supply Us, an air-core reactor, a detection circuit and a discharge detector A, wherein the detection circuit includes a series coupling capacitor Ck and a detection impedance Zm.

[0026] The power supply Us is used to load the test voltage to both ends of the air-core reactor.

[0027] The detection circuit is connected in parallel with the air-core reactor. The detection circuit includes a series coupling capacitor Ck and a detection impedance Zm, the coupling capacitor Ck is used to couple the pulse current genera...

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PUM

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Abstract

The embodiment of the invention provides a method and system for detecting the partial discharge of an air core reactor and relates to the technical field of partial discharge detection, and the partial discharge of a dry type air core reactor can be detected. The concrete scheme comprises a step of loading testing voltage to the air core reactor, a step of allowing a detection circuit to be in parallel connection with the air core reactor, wherein the detection circuit comprises a coupling capacitor and a detection impedor in a series connection, the coupling capacitor is used for coupling pulse current which is generated by the air core reactor in partial discharge, and the detection impedor is used for converting the pulse current detected by the coupling capacitor into a pulse voltage signal, and a step of determining the discharge amount of the air core reactor in partial discharge according to the pulse voltage signal outputted by the detection circuit. The method and the system are used for detecting the partial discharge.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection, in particular to a method and system for detecting partial discharge of an air-core reactor. Background technique [0002] With the development of the national economy, the society's requirements for the quality of power grid power supply are constantly increasing, and correspondingly, the requirements for the reliability of grid equipment are also constantly increasing. [0003] Dry-type air-core reactor is a widely used grid equipment. For a long time, there has been a lack of insulation status monitoring and testing methods for dry-type air-core reactors, resulting in a lack of operation and maintenance of dry-type air-core reactors, and a high defect rate in operation. Therefore, carrying out the detection of partial discharge of dry-type air-core reactors, timely discovering the hidden dangers of dry-type air-core reactor insulation, and carrying out maintenance and repl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/129
Inventor 邹林李锐海熊亚平
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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