Capacitive voltage transformer performance detection method and system

A technology of voltage transformer and detection method, which is applied in capacitance measurement, voltage divider, measurement of resistance/reactance/impedance, etc., can solve problems such as poor accuracy, insulation performance of capacitive voltage transformer, voltage distribution ratio error, etc. achieve the effect of efficient calculation

Active Publication Date: 2022-06-07
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] When testing the performance of capacitive voltage transformers in the prior art, it often only considers the capacitance test value and the factory initial value or rated value of the capacitive voltage transformer, ignoring the internal relationship between the capacitance values ​​of the capacitive voltage transformer , and this internal relationship determines the overall insulation performance, voltage distribution, and transformation ratio error of the capacitor voltage transformer; thus resulting in poor accuracy of the existing performance detection methods of the capacitor voltage transformer

Method used

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  • Capacitive voltage transformer performance detection method and system
  • Capacitive voltage transformer performance detection method and system
  • Capacitive voltage transformer performance detection method and system

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Embodiment 1

[0031] In one or more embodiments, a method for detecting the performance of a capacitive voltage transformer is disclosed, refer to figure 2 , including the following steps:

[0032] (1) Obtain the initial vector of capacitance value of capacitive voltage transformer;

[0033] Specifically, refer to figure 1 Given the schematic diagram of the capacitive voltage divider of the capacitive voltage transformer, the capacitance value C of the upper section can be obtained through the brand-name data of the capacitive voltage transformer 11 and the voltage divider ratio k, the capacitance value of the next section is determined by the capacitance C 12 and the voltage divider capacitor C 2 obtained in series. In order to make the voltage distribution uniform in the capacitive voltage transformer, the capacitance value of the upper section and the capacitance value of the lower section are equal, that is:

[0034]

[0035] The main capacitor C of the capacitive divider 1 by...

Embodiment 2

[0067] In one or more embodiments, a capacitive voltage transformer performance detection system is disclosed, comprising:

[0068] means for obtaining an initial vector of capacitance values ​​of a capacitive voltage transformer;

[0069] A device used to obtain the test vector of the capacitance value of the voltage transformer through the high-voltage electrical test;

[0070] A device for calculating the linear correlation coefficient of the initial vector of the capacitance value and the test vector of the capacitance value as the performance detection index of the capacitive voltage transformer;

[0071] An apparatus for detecting the performance of a capacitive voltage transformer based on the index.

[0072] The specific working manner of the above apparatus is the same as the implementation process of the method in the first embodiment, and will not be repeated.

Embodiment 3

[0074] In one or more embodiments, a terminal device is disclosed, including a server, the server including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the The method for detecting the performance of the capacitive voltage transformer in the first embodiment is implemented during the program. For brevity, details are not repeated here.

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Abstract

The invention discloses a method and system for detecting the performance of a capacitive voltage transformer, comprising: obtaining an initial vector of the capacitance value of the capacitive voltage transformer; obtaining a test vector of the capacitance value of the voltage transformer through a high-voltage electrical test; and calculating the initial vector of the capacitance value The linear correlation coefficient between the vector and the capacitance value test vector is used as a performance detection index of the capacitor voltage transformer; the performance of the capacitor voltage transformer is detected based on the index. The performance detection method of the capacitive voltage transformer of the present invention not only considers the deviation between each capacitance value of the capacitive voltage transformer and the factory initial value, but also takes into account the internal laws between the capacitance values ​​of the capacitive voltage transformer, so that it is more accurate and comprehensive , Effectively calculate the capacitance test results of the capacitor voltage transformer, so as to obtain a more accurate performance detection method of the capacitor voltage transformer.

Description

technical field [0001] The invention relates to the technical field of power equipment performance detection, in particular to a performance detection method and system of a capacitive voltage transformer. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] As an important electrical equipment, voltage transformer plays an important role in connecting primary equipment and secondary equipment. It is widely used in electric energy measurement, relay protection, automatic control and other fields. Its working state is of great significance to ensure the safe operation of the entire power system. . Capacitive voltage transformers have been widely used in voltage levels of 110kV and above due to the advantages of reasonable insulation structure, high dielectric strength, significant economy, and full use of coupling capacitors required for carrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/02G01R15/06G01R27/26
CPCG01R35/02G01R15/06G01R27/2605
Inventor 陈伟坤吴寿山白志轩雷敏刘鹏孙昭昌葛惠阳张倩
Owner STATE GRID SHANDONG ELECTRIC POWER
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