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Device for detecting hydrophobicity of composite insulator of power transmission line and control method for device

A technology of composite insulators and transmission lines, which is applied in the direction of testing dielectric strength, etc., can solve the problems of high failure rate of transmission lines, loss of hydrophobicity, and affecting the stability of transmission lines, etc., to reduce failure rate, high accuracy, and improve stability sexual effect

Inactive Publication Date: 2012-06-13
TIANJIN UNIV
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Problems solved by technology

[0006] Due to the aging of composite insulators, the hydrophobicity is gradually lost, which affects the stability of the transmission line, and the transmission line has a high failure rate

Method used

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  • Device for detecting hydrophobicity of composite insulator of power transmission line and control method for device
  • Device for detecting hydrophobicity of composite insulator of power transmission line and control method for device
  • Device for detecting hydrophobicity of composite insulator of power transmission line and control method for device

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] Composite insulators will gradually decrease or even lose their hydrophobicity due to pollution, humidity, discharge and other factors. The severe decrease of hydrophobicity will lead to a significant decrease of the pollution flashover voltage of composite insulators, thus threatening the safe and stable operation of the power system. Through the detection of the flashover insulator, it is found that its hydrophobic state has changed. Therefore, the aging degree of the transmission line can be obtained in real time through the detection of the hydrophobicity of the composite insulator surface, and the detection of the transmission line can be realized.

[0044] In the relevant standards of IEC, the measurement of hydrophobicit...

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Abstract

The invention discloses a device for detecting hydrophobicity of a composite insulator of a power transmission line and a control method for the device. By measuring characteristic parameters, including discharge amplitudes, discharge times and time intervals between each two adjacent discharge amplitudes and between adjacent discharge time, of surface discharge of the composite insulator at different aging time and by analyzing the characteristic parameters, three spectrograms corresponding to surface discharge characteristics of the composite insulator at different aging time are obtained. Fractal dimension and similarity corresponding to the three spectrograms are obtained by analyzing the three spectrograms, the hydrophobicity of the composite insulator is detected in real time, the aged power transmission line is timely replaced according to aging degree, the stability of the power transmission line is improved, and the failure rate of the power transmission line is reduced. Moreover, as surface discharge current parameters are directly obtained, the device is less subjected to external interference and quite high in accuracy, and meets the requirements of practical application.

Description

technical field [0001] The invention relates to the field of insulation fault detection of power equipment, in particular to a device for detecting the hydrophobicity of composite insulators of transmission lines and a control method thereof. Background technique [0002] Composite insulators have been used as the external insulation of transmission lines for nearly 40 years. Composite insulators are used in power grids in many countries and regions, and the number of grid-connected insulators is still gradually increasing. Composite insulators have been widely used in my country's power grids due to their advantages such as high pollution flashover and wet flashover voltages and light weight. With the gradual increase of the voltage level of my country's power grid, the requirements for the external insulation of transmission lines are also getting higher and higher, and the role of composite insulators in the power grid is becoming more and more important. [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 杜伯学程欣欣李杰刘勇高宇
Owner TIANJIN UNIV
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