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Study on Turn-to-turn Short Circuit On一line Monitoring System for Dry一type Ai r一core Reactor(PDF)

《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2017年02期
Page:
67-71
Research Field:
电气与电子工程
Publishing date:

Info

Title:
Study on Turn-to-turn Short Circuit On一line Monitoring System for Dry一type Ai r一core Reactor
Author(s):
GAO Zi-wei `ZHU Xue-cheuR-`WANG YouR--houR-`ZHUANG Yu
(1. 2. Sehnnl of laeetrie lleilon}jian} L,lectric lower Kesearch lnstitute and L,n}ineerin}, 日arhin I」 nicersitv of Seienee llarbin 150090,China; and’fechnolo}y, llarbin 150080,China)
Keywords:
Keywords:dry-type 月} r-core reactorturn-to-turn short circuitimpedance variationon-line monitoring
PACS:
-
DOI:
10.15938/j.jhust.2017.02.013
Abstract:
Abstract:The change of current value caused by turn-to-turn short circuit of dry-type air-core reactor is so little that failure detection is difficult to be carried out. In order to solve this problem,a new on-line monitoring system based on impedance variation of turn-to-turn short circuit is proposed. The numerical method is applied to analyze the variation of equivalent resistance and equivalent reactance when dry-type air-core reactor winding short circuit happens in different places,and the monitoring method based on harmonic analysis method and quasi- synchronization sampling method is analyzed by theory. The hardware system,which takes single-chip microcomputer as the core of data processing and logic control,completes data acquisition of voltage signal and current signal of the reactor. In the respect of software design,the impedance variation will be uploaded to the PC after it has been calculated by using the above monitoring method,and then monitoring of turn-to-turn short circuit fault will be realized. Finally,the design of on-line monitoring system is studied by testing. The research result shows that,the equivalent resistance increases and the equivalent reactance decreases when turn-to-turn short circuit occurs,and the variation of equivalent resistance is more obvious than equivalent reactance. The experiment results prove that this monitoring method is true and the on-line monitoring system is feasible.

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Last Update: 2017-06-12