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Transformer direct-current resistance and on-load tap-changer integrated tester

A comprehensive tester and on-load tap technology, applied in circuit breaker testing, measuring resistance/reactance/impedance, instruments, etc., can solve the problems of wasting manpower, material resources and man-hours, inaccuracy, changing wiring methods, etc. achieve the effect of improving work efficiency

Inactive Publication Date: 2016-07-27
STATE GRID ZHEJIANG NINGBO YINZHOU POWER SUPPLY LTD CO +2
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Problems solved by technology

Especially when single-phase direct resistance is selected, the wiring method must be changed frequently, which wastes a lot of manpower, material resources and working hours
Moreover, for the transformer DC resistance test item, due to the inaccuracy of the oil temperature on the upper layer of the transformer on site, there is a large error in the calculation of the DC resistance value

Method used

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  • Transformer direct-current resistance and on-load tap-changer integrated tester

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Embodiment Construction

[0033] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] The embodiment of the present invention discloses a transformer DC resistance and on-load tap-changer comprehensive tester, which can simultaneously test the transformer's DC resistance and the transformer on-load tap-changer parameters, avoiding the need for two different experiments to be carried out separately. Different...

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Abstract

The application discloses a transformer DC resistance and on-load tap changer comprehensive tester, including: a central processing unit; a constant current source connected to the central processing unit and outputting a constant current signal; connected to the central processing unit and the constant current source, A function switching circuit that outputs a DC resistance test signal or an on-load tap-changer parameter test signal; a data acquisition circuit that is connected to the function switching circuit and performs data collection according to the DC resistance test signal or an on-load tap-changer parameter test signal; and a function switch The circuit is connected with the data acquisition circuit, and when the function switching circuit outputs the DC resistance test signal, the oil temperature data of the transformer under test is collected and sent to the wireless temperature measurement module of the data acquisition circuit; the central processing unit receives the data collected by the data acquisition circuit and performs Output the measurement results after processing. The scheme can realize the automatic switching test of the DC resistance of the transformer or the parameters of the on-load tap changer, and can accurately and real-time measure the DC resistance of the transformer.

Description

technical field [0001] The invention relates to a high-voltage electrical measuring instrument, in particular to a transformer DC resistance and on-load tap changer comprehensive tester. Background technique [0002] The DC resistance test of the transformer winding is an indispensable test item after the transformer is handed over, overhauled, and the tap changer is changed. At the same time, the on-load tap-changer is the only moving part connected to the transformer circuit. Detection is very important. In the "Power Equipment Handover and Preventive Test Regulations", it is required to check the action sequence of the on-load tap changer, measure the switching time, etc. [0003] The traditional test method for the two test items is a split test, that is, a transformer DC resistance tester and a transformer on-load tap-changer tester are connected and tested separately. Because it is two independent instruments, each instrument is equipped with a dedicated test line, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R27/02
CPCG01R31/3277G01R27/02
Inventor 李光军严浩军夏巧群姜炯挺赵铁林郑健郑坤力袁忠君袁丹刘亮泽
Owner STATE GRID ZHEJIANG NINGBO YINZHOU POWER SUPPLY LTD CO
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