A method for on-line monitoring of lightning protection and ice flashing composite insulators
A technology of composite insulators and insulators, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve the problems of inability to reliably judge the aging fault of lightning protection and ice protection insulators
Active Publication Date: 2021-05-14
STATE GRID HUNAN ELECTRIC POWER +2
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[0005] In the case that the existing leakage current and infrared on-line monitoring devices cannot reliably determine whether the lightning protection and anti-icing insulators have aging faults, the present invention proposes an online monitoring method for lightning and anti-icing flash composite insulators, so as to solve how to realize the anti-icing insulator. Technical Issues of On-Line Health Status Assessment and Monitoring of Lightning Ice Flash Composite Insulators
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[0038] The present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments, and the technical problems and beneficial effects solved by the technical solutions of the present invention are also described. It should be pointed out that the described embodiments are only intended to facilitate the implementation of the present invention understood without any limitation.
[0039] Such as figure 1 As shown in the topological structure diagram of the online monitoring device, the online monitoring device mainly includes a three-layer structure: a measurement layer, a transmission layer, and a processing layer. The measurement layer measures the lightning current flowing through the lightning protection and anti-icing flash synthetic insulator through the Rogowski coil, and the transmission layer transmits the current and voltage waveform data of the lightning current to the processing layer in real time for data proce...
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The invention provides an on-line monitoring method for lightning protection and anti-ice composite insulators. The method obtains the lightning current waveform data flowing through the lightning protection and anti-ice flash composite insulator through measurement, and combines the impulse current withstand times and lightning energy withstand times to finally calculate Obtain the thermal melting aging coefficient and thermal stress aging coefficient, and judge and monitor the aging and deterioration degree of the insulator by judging whether the thermal melting aging coefficient and thermal stress aging coefficient exceed the set threshold, and promptly prompt the operator to replace the lightning protection Anti-ice flash synthetic insulators. This method can realize the real-time monitoring of the health status of the synthetic insulator for lightning protection and ice flashing protection, and provide a basis for the replacement of lightning protection and ice protection insulators. Simple and easy to implement, high reliability and low cost.
Description
technical field [0001] The invention belongs to the field of on-line monitoring of power systems, and in particular relates to an on-line monitoring method of a synthetic insulator for lightning protection and ice flash protection. Background technique [0002] According to statistics, more than 50% of the tripping accidents in the power system are caused by lightning strikes. With the continuous development of the national economy, people have put forward higher requirements for the reliability of electricity consumption. Among many lightning protection measures, lightning protection and anti-ice insulators It has been widely used because of its good nonlinear characteristics. The health status of lightning protection and anti-icing insulators is related to the safe and stable operation of power systems. Therefore, it is very important to develop high-reliability online monitoring devices for lightning and anti-icing insulators. significance. [0003] The anti-lightning an...
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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 陆佳政谢鹏康方针蒋正龙胡建平王博闻彭永晶
Owner STATE GRID HUNAN ELECTRIC POWER