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Fault diagnosis method of dry reactor high-frequency oscillation impact voltage-withstanding test

A dry-type reactor and fault diagnosis technology, which can be used in instruments, measuring electrical variables, measuring devices, etc., and can solve problems such as misjudgment of reactors

Active Publication Date: 2016-01-06
XI AN JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since many circuit components are involved in the high-frequency impulse withstand voltage test circuit of dry-type reactors, whether there are faults in these circuit components has a significant impact on the test results, which will lead to misjudgment of the reactor test. How to avoid this kind of misjudgment Accurate and effective high-frequency impulse withstand voltage tests for dry-type reactors have become a key problem at present.

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  • Fault diagnosis method of dry reactor high-frequency oscillation impact voltage-withstanding test
  • Fault diagnosis method of dry reactor high-frequency oscillation impact voltage-withstanding test

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Embodiment Construction

[0023] The present invention will be further described through specific embodiments below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the dry-type reactor high-frequency impulse withstand voltage test circuit in the present invention mainly includes a standard impulse voltage generator 1, a first voltage divider 2, a first shunt 3, an oscillating inductance 4, a load capacitor 5, and a dry-type reactor under test. Type reactor 6, second shunt 7, and second voltage divider 8.

[0025] Among them, under the action of the impulse voltage generated by the standard impulse voltage generator, the tested dry-type reactor 6 is subjected to a discharge test. The load capacitor 5 is connected in parallel with the circuit branch where the tested dry-type reactor 6 is located. The inductance 4 and the standard impulse voltage generator 1 are connected in series to form a loop.

[0026] At the same time, the voltage and current at a specific positio...

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Abstract

Provided is a fault diagnosis method of a dry reactor high-frequency oscillation impact voltage-withstanding test. The fault diagnosis method is used in a dry reactor high-frequency oscillation impact voltage-withstanding test, diagnoses the fault of a sample by solving the transfer function of a tested dry reactor, performs fault diagnosis by comparing transfer function maximum values at different positions and under different test voltage, and prevents misjudgment caused by faults of test loop components.

Description

Technical field [0001] The invention belongs to the technical field of high voltage and insulation, and in particular relates to a fault diagnosis method in a dry-type reactor high-frequency oscillation shock withstand voltage test. Background technique [0002] Reactor is an important equipment in the power grid. It has the functions of reactive power compensation and filtering. It has the characteristics of large quantity and wide application in the power grid. There are two types of reactor insulation, one is the oil-immersed type, which mainly uses insulating oil as the insulating medium; the other is the dry type, which uses epoxy casting and impregnation to form insulation. Dry-type reactors have the advantages of simple structure, light weight and low cost, and are more and more widely used in power grids. Dry-type reactors will gradually age and deteriorate due to grid voltage, impulse voltage and environmental stress during operation, and will fail during operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 李军浩
Owner XI AN JIAOTONG UNIV