Method for predicting composite insulator temperature rise
A composite insulator and prediction method technology, applied in the field of composite insulator temperature rise prediction, can solve problems such as abnormal temperature rise, and achieve the effect of ensuring normal operation
Active Publication Date: 2020-01-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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In addition, in the investigation of many composite insulator failure accidents in China, researchers found that composite insulators had abnormal temperature rise before failure and failure.
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[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without cre...
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Abstract
The present invention discloses a method for predicting composite insulator temperature rise. Based on the time-corona strength equivalent model of the composite insulator saturated hygroscopic dielectric loss, the relationship between the composite insulator saturated hygroscopic dielectric loss tan[delta], the corona strength E, and the aging time tE when the corona intensity is E is obtained; linear fitting is performed on the relationship to obtain the relationship between the composite insulator temperature rise Ti and the composite insulator saturated hygroscopic dielectric loss tan[delta], so that the relationship between the composite insulator temperature rise Ti, the corona strength E, and the aging time tE when the corona intensity is E is obtained; when the corona strength E born on the surface of the composite insulator and the aging time tE when the corona strength is E are known, the tE is the operating time of the composite insulator, that is, the composite insulator temperature rise Ti is obtained. According to the method provided by the present invention, the composite insulator temperature rise can be predicted according to a simulation result, the accident or incident of the composite insulator can be predicted in a facilitated manner, and the method is of great significance to guide the operation and maintenance of external insulation equipment.
Description
technical field [0001] The invention relates to the technical field of power transmission detection, in particular to a method for predicting the temperature rise of a composite insulator. Background technique [0002] Composite insulators have been widely used in my country since the 1990s because of their excellent performance in polluted environments. Composite insulators are widely used in transmission lines with voltage levels of 110kV and above in China, and China has become the first country in the world to use organic external insulation as the mainstay in UHV AC and DC transmission systems. However, compared with traditional porcelain and glass insulators, composite insulators have less experience in operation. In the long-term operation, some accidents or accidents have occurred, such as unexplained flashover, shed damage, rotten fracture and abnormal temperature rise etc. These accidents or accidents are the main challenges faced by composite insulators in large...
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IPC IPC(8): G01R31/00G01R31/12G01R27/26G01J5/00
CPCG01J5/0096G01R27/2694G01R31/00G01R31/1245
Inventor 袁之康屠幼萍姜艺楠丁立健申瑞王璁王景春
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)