Method and device for measuring polarity of capacitor voltage transformer by using self-excitation method

A voltage transformer and capacitive technology, which is applied in the field of self-excitation method to measure the polarity of capacitive voltage transformers, can solve the problems of consuming a lot of extra time and energy, unable to test capacitive voltage transformers, etc., and achieves convenient operation and large scale The practical value of engineering and the effect of portability

Inactive Publication Date: 2016-05-25
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The embodiment of the present invention provides a self-excited method and device for measuring the polarity of the capacitor voltage transformer to solve the problem that the polarity of the capacitor voltage transformer cannot be tested directly in the prior art, resulting in a waste of time in the testing process. A lot of extra time and effort for the problem

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  • Method and device for measuring polarity of capacitor voltage transformer by using self-excitation method
  • Method and device for measuring polarity of capacitor voltage transformer by using self-excitation method
  • Method and device for measuring polarity of capacitor voltage transformer by using self-excitation method

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Embodiment Construction

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, 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 shall fall within the protection scope of the present invention.

[0030] see figure 1 , which is a schematic structural diagram of a device for measuring the polarity of a capacitor voltage transformer by a self-excitation method provided by an embodiment of the present invention. The device is used to measure a capacitor voltage transformer 1, wherein the capacitor voltage transformer 1 The high vol...

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Abstract

The embodiment of the invention discloses a method and device for measuring the polarity of a capacitor voltage transformer by using a self-excitation method. The device is used for measuring the capacitor voltage transformer. The device includes a direct-current voltage generation device and a pointer type voltage meter, wherein, the direct-current voltage generation device is connected in parallel with the secondary side of the capacitor voltage transformer, and the pointer type voltage meter is connected in parallel with the primary side of the capacitor voltage transformer. The method includes the following steps that: the direct-current voltage generation device is controlled to be switched on, and a test channel is controlled to be switched on for the measurement of the polarity of the capacitor voltage transformer; when the direct-current voltage generation device is switched on, the deviation direction of the pointer of the pointer type voltage meter is observed and recorded; and the polarity of the capacitor voltage transformer is judged according to the deviation direction of the pointer of the pointer type voltage meter. The method and device provided by the invention have the advantages of operational simplicity, safety, reliability, high economical efficiency and operational performance.

Description

technical field [0001] The invention relates to the technical field of high-voltage power equipment detection, in particular to a method and a device for measuring the polarity of a capacitive voltage transformer by a self-excitation method. Background technique [0002] Capacitive voltage transformer is a very important high-voltage power transmission and transformation equipment. It is mainly used as a voltage signal sampling device for voltage measurement and relay protection. Its secondary voltage signal is an important criterion for power system failure. There is no accurate and effective method for calibrating capacitive voltage transformers during engineering commissioning. As a result, during the commissioning process of substations, problems such as secondary wiring errors or reverse connections of voltage transformers are prone to occur, causing relay protection to fail to correctly identify system faults. Therefore, a polarity test should be carried out before and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/06
Inventor 沈鑫闫永梅赵丹妮李月梅曹敏周年荣张林山黄星李鹏
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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