Outdoor HV composite polymeric insulators

Hackam, R.

doi:10.1109/94.798114

Cited by 370 publications

(113 citation statements)

References 146 publications

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“…Both service experience [1] and the laboratory tests demonstrated a better performance in contaminated conditions [2,3] . Porcelain and glass have traditionally been used as the oldest and most economic insulating materials and their advantages and drawbacks are well known.…”

Section: Introductionmentioning

confidence: 92%

“…Porcelain and glass have traditionally been used as the oldest and most economic insulating materials and their advantages and drawbacks are well known. However, the polymeric insulators have replaced ceramic units due to wide range of reasons such as lightweight, less cost, high mechanical strength, resistance to contamination [1][2][3] . Figure 1 shows the breakup of these reasons obtained during a survey [4] .…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2 shows the results of a survey done by CIGRE to investigate the global distribution of composite insulators at voltage levels above 69 kV, indicated that GCC is one of the regions where composite insulators are gaining ground [5,6] . Polymeric materials are badly affected by environmental stresses like UV-radiations, heat, contaminations and moisture [2,7,9] . The weather conditions in the Middle East including Saudi Arabia are significantly harsh and changing from the daytime to the night.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Khan¹

2009

American J. of Engineering and Applied Sciences

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Problem statement: High Voltage (HV) polymeric insulators are replacing ceramic insulator commonly used for HV outdoor networks due to their ease of handling, reliability and cost. However, their long term performance and reliability are major concerns to power utilities. Approach: To investigate their performance in arid desert's conditions, two types of HV composite insulators were aged as per International Electrochemical Commission (IEC) standard-61109. Additional test samples were subjected to accelerated aging conditions simulating the actual Ultraviolet (UV) radiation intensity and temperature in the inland desert. Results: This study described the experimental results of the effects of thermo electric stress and UV radiations on the polymeric insulators aged under two conditions i.e., as per IEC standard and modified IEC standard that simulates the inland arid desert. The tests results after the artificial accelerated aging indicated that the dielectric response of thermoplastic insulators under the tested thermo-electric cum UV-irradiations outperforms Silicone rubber insulators. Conclusion: From the obtained results it will be easy to assess the performance and suitability of composite insulators for their applications in arid desert environments.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Khan¹

2009

American J. of Engineering and Applied Sciences

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“…High voltage (HV) polymeric insulators are frequently used in outdoor installations of power systems, because of their satisfying insulation properties such as light weight, higher mechanical strength and better performance in presence of heavy pollution in wet conditions [1]. Due to non-healing characteristics of solid insulators, breakdown of an insulator is irreversible and hence total breakdown may occur.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Degradative Signals on Outdoor Solid Insulators Using Continuous Wavelet Transform

Uzunoğlu¹

2016

Journal of Electrical Engineering and Technology

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-Most outdoor solid insulators may suffer from surface degradations due to non-stationary currents that flow on the insulator surface. These currents may be classified as leakage, discharge and tracking currents due to their disturbing potencies respectively. The magnitude of these currents depends on the degree of the contamination of surface. The leakage signals are followed by discharge signals and tracking signals which are capable of forming carbonized tracking paths on the surface between high voltage and earth contacts (surface tracking). Surface tracking is one of the most breakdown mechanisms observed on the solid insulators, especially polymers which may cause severely reduced lifetime. In this study the degradations observed on polyester resin based insulators are investigated according to the IEC 587 Inclined Plane Test Standard. The signals are monitored and recorded during tests until surface tracking initiated. In order to prevent total breakdown of an insulator, early detection of tracking signals is vital. Continuous Wavelet Transform (CWT) is proposed for classification of signals and their energy levels observed on the surface. The application of CWT for processing and classification of the surface signals which are prone to display high frequency oscillations can facilitate real time monitoring of the system for diagnosis.

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“…Insulator, as the key component of the system, is related to the safety of the entire grid. In recent years, polymeric insulators have been widely used in power supply and distribution systems because of good shatterproof nature, light weight, superior mechanical property and low maintenance cost [1][2][3] . Insulator with hydrophobic surface has better electrical flashover characteristics than that with hydrophilic surface or glass.…”

mentioning

confidence: 99%

Hydrophobicity Classification of Polymeric Insulators Based on Embedded Methods

et al. 2015

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Hydrophobicity is an important parameter to characterize electrical properties of insulated materials. Therefore, it is an urgent task to develop on-line instruments to identify the hydrophobicity of insulated material's surface conveniently, quickly and accurately. For this purpose, a novel evaluation system with image processing and decision tree is proposed which is based on embedded platform. For obtaining satisfactory results, we first propose a mixed image segmentation method to overcome the complex conditions outside, concerning non-controlled illumination, nonstandard surfaces and unfixed shooting angle. Then we adopt four new characteristic parameters to describe the image of each sample. Finally, a classification method based on MultiBoost decision tree is conducted which synthesizes the merits of both AdaBoost and Wagging algorithm. Results indicate the procedures can be applied in the DSP (Digital Signal Processor) platform perfectly and better results can be obtained than those did in our previous study or that of some other research.

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Outdoor HV composite polymeric insulators

Cited by 370 publications

References 146 publications

Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Investigation of Degradative Signals on Outdoor Solid Insulators Using Continuous Wavelet Transform

Hydrophobicity Classification of Polymeric Insulators Based on Embedded Methods

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