Journal ArticleDOI
Failure analysis of decay-like fracture of composite insulator
TLDR
In this article, the decay-like fracture of composite insulator was treated and studied as a new type of composite-insulator mechanical failure, and the main features of decaylike fracture were summarized.Abstract:
In recent years, a new type of composite insulator mechanical failure appeared in high voltage transmission lines, which is a type of severe accident for power system, but only few studies on it have been reported all over the world. In this paper, this type of failure was named Decay-like Fracture by summarizing and analyzing the general features, and the decay-like fracture of composite insulator was treated and studied as a new type of composite insulator mechanical failure. By analyzing some field failed composite insulators in China, main features of decay-like fracture were then summarized. The fracture spot of decay-like fractured insulator became crisp and looked like decayed wood. The mechanisms of the normal fracture and brittle fracture of composite insulator cannot explain decay-like fracture, and boron-free Fiber Reinforced Plastic (FRP) core which has been widely used to prevent brittle fracture could not prevent decay-like fracture. Decay-like fracture is not a pure mechanical failure. The discharging and surface micro current on the core surface would finally lead to mechanical fracture of composite insulator. But the process and mechanism of decay-like fracture still need further researches.read more
Citations
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Journal ArticleDOI
Localization of multiple insulators by orientation angle detection and binary shape prior knowledge
Zhenbing Zhao,Liu Ning,Le Wang +2 more
TL;DR: In this article, the authors proposed a localization method of multiple insulators with different angles in complex aerial image based on Orientation Angle Detection and Binary Shape Prior Knowledge (OAD-BSPK).
Journal ArticleDOI
Decay-like fracture mechanism of silicone rubber composite insulator
TL;DR: In this article, a decay-like fracture of composite insulator was investigated and microscopic physic-chemical properties of fracture-like fractured fiber reinforced plastic (FRP) core rod were analyzed using Scanning Electron Microscope (SEM), TGA and Fourier Transform Infrared (FTIR) Spectroscopy methods.
Journal ArticleDOI
Improving the outdoor insulation performance of Chinese EHV and UHV AC and DC overhead transmission lines
TL;DR: In this article, the authors refer to the large area outage accidents as flashover events on several main transmission overhead lines and substations, appearing during one or several consequent severe meteorological events and continuing for several days.
Journal ArticleDOI
Research of nondestructive methods to test defects hidden within composite insulators based on THz time-domain spectroscopy technology
TL;DR: In this article, a novel far-field nondestructive testing (NDT) for defects within composite insulators based on the terahertz time-domain spectroscopy (THz-TDS) technology was introduced.
Journal ArticleDOI
Deep Learning Approaches on Defect Detection in High Resolution Aerial Images of Insulators.
TL;DR: In this paper, two deep learning methods based on Faster R-CNN (faster region-based convolutional neural network) are proposed to detect the defect location in high-resolution insulator images collected by UAVs in various environments.
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Journal Article
Evaluation Method of Defect and Fracture Reason for Composite Insulator
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