scholarly journals Partial Discharge Characteristics of Polymer Nanocomposite Materials in Electrical Insulation: A Review of Sample Preparation Techniques, Analysis Methods, Potential Applications, and Future Trends

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Wan Akmal Izzati ◽  
Yanuar Z. Arief ◽  
Zuraimy Adzis ◽  
Mohd Shafanizam
Keyword(s):  
Electrical Properties ◽  
Power Systems ◽  
Polymer Nanocomposites ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Partial Discharge ◽  
Analytical Techniques ◽  
Future Trends ◽  
Weight Percentage ◽  
Academic Review

Polymer nanocomposites have recently been attracting attention among researchers in electrical insulating applications from energy storage to power delivery. However, partial discharge has always been a predecessor to major faults and problems in this field. In addition, there is a lot more to explore, as neither the partial discharge characteristic in nanocomposites nor their electrical properties are clearly understood. By adding a small amount of weight percentage (wt%) of nanofillers, the physical, mechanical, and electrical properties of polymers can be greatly enhanced. For instance, nanofillers in nanocomposites such as silica (SiO2), alumina (Al2O3) and titania (TiO2) play a big role in providing a good approach to increasing the dielectric breakdown strength and partial discharge resistance of nanocomposites. Such polymer nanocomposites will be reviewed thoroughly in this paper, with the different experimental and analytical techniques used in previous studies. This paper also provides an academic review about partial discharge in polymer nanocomposites used as electrical insulating material from previous research, covering aspects of preparation, characteristics of the nanocomposite based on experimental works, application in power systems, methods and techniques of experiment and analysis, and future trends.

Comparative Study on Partial Discharge Characteristic in Polymer-Nanocomposite as Electrical Insulating Material

2013 ◽  
Vol 284-287 ◽  
pp. 62-66
Author(s):  
Wan Akmal Izzati ◽  
Mohd Shafanizam ◽  
Yanuar Z. Arief ◽  
Mohamad Zul Hilmey Makmud ◽  
Zuraimy Adzis ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Partial Discharge ◽  
Specific Area ◽  
Polymer Nanocomposite ◽  
Insulating Material ◽  
Weight Percentage ◽  
Experimental Works

Polymer nanocomposites have been attracting attention among researchers as electrical insulating application from energy storage to power delivery. However, partial discharge has always been a predecessor to major faults and problems in this field. In addition, there are a lot more to explore as the characteristic of partial discharge in nanocomposites is not clearly understood as well as the electrical properties of the nanocomposites. By adding a few amount of weight percentage (wt%) of the nano fillers, the physical, mechanical and electrical properties of polymers can be greatly enhanced. This is due to its amazing characteristic of having large specific area as a consequential from its nano sized particle that could enhance the electrical properties of the insulator. For instance, nano fillers in nanocomposites such as silica (SiO2), alumina (Al2O3) and titania (TiO2), play big role in providing good approach to increase dielectric breakdown strength and partial discharge resistance of nanocomposites. Such polymer nanocomposites will be reviewed thoroughly in this paper based on previous experimental works and studies. This paper provides reviews from related publications from year 1997 to 2011 including the results of experimental works which have been conducted by the authors with main focus on partial discharge characteristics in polymer nanocomposites, which demonstrates that research and utilization of polymer nanocomposites has well developed from past decades and will possess a high demand in future as electrical insulating material.

Recent Developments in Multifunctional Nanocomposites Using Carbon Nanotubes

2010 ◽  
Vol 63 (5) ◽  
Author(s):  
Jacob M. Wernik ◽  
Shaker A. Meguid
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Health Monitoring ◽  
Future Trends ◽  
Theoretical Investigations ◽  
Monitoring Applications ◽  
Recent Developments ◽  
Thermal And Electrical Properties ◽  
Multifunctional Nanocomposites

This review summarizes the most recent advances in multifunctional polymer nanocomposites reinforced by carbon nanotubes and aims to stimulate further research in this field. Experimental and theoretical investigations of the mechanical, thermal, and electrical properties of carbon nanotubes and their composite counterparts are presented. This review identifies the processing challenges associated with this class of materials and presents techniques that are currently being adopted to address these challenges and their relative merits. This review suggests possible future trends, opportunities, and challenges in the field and introduces the use of these multifunctional nanocomposites in structural health monitoring applications.

Polyimide Film for Generator Winding

2017 ◽  
pp. 15-56
Keyword(s):  
Electrical Properties ◽  
Water Absorption ◽  
Surface Charge ◽  
Breakdown Voltage ◽  
Dielectric Breakdown ◽  
Partial Discharge ◽  
Polyimide Film ◽  
Polyimide Films ◽  
Direct Fluorination ◽  
Voltage Frequency

Polyimide film is widely used in different areas due to its brilliant chemical and electrical properties. This chapter discusses effect of direct fluorination on surface charge and surface partial discharge of polyimide films. The influences of different fluorination time and voltage frequency are studied. The trap properties of polyimide film are analyzed. It is clear that the fluorination has changed the micro structure of the sample so that the trap property and the dissipation time are different. Further research focuses on the effects of water absorption on surface charge and dielectric breakdown of nanocomposite. The polyimide/Al2O3 film is selected as sample and the relation between water absorption and surface charge and breakdown voltage is discussed.

scholarly journals Dielectric Breakdown Strength of Polymer Nanocomposites-The Effect of Nanofiller Content

2018 ◽  
Author(s):  
Markus Takala
Keyword(s):  
Polymer Nanocomposites ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Theoretical Models ◽  
Polymer Materials ◽  
Insulation Material ◽  
Interface Area ◽  
Dielectric Breakdown Strength ◽  
Maximum Value ◽  
Nanofiller Content

<p>Insulation materials can be tailored by compounding nanofillers and polymer materials. The advantageous changes in properties of polymer nanocomposites can be explained by the large interface area of the nanofillers. Theoretical models developed in the field of nanodielectrics concentrate on the analysis of the interface volume.<br />Dielectric breakdown strength (DBS) is one of the most important properties of an insulation material. The DBS of nanocomposites depends heavily on the nanofiller content and even small quantities can cause improvement. This is linked to the maximum interface volume achieved already at low nanofiller concentrations. Homogeneous nanodispersion is the key for DBS increase and reliable results. Often the most profitable nanofiller quantities are below 5 wt-%. The same kind of behaviour can be seen with different voltage shapes, but with dc voltage the increase is bigger. DBS has a maximum value with respect to nanofiller amount and decreases thereafter. Filler quantities around 5 wt-% and even lower are the most attractive considering DBS of nanocomposites.</p>

Polymer Nanocomposites for Energy Storage Applications

2010 ◽  
Author(s):  
Amira B. Meddeb ◽  
Zoubeida Ounaies
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
Polymer Nanocomposites ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Polarized Light ◽  
Scanning Calorimetry ◽  
Low Dielectric ◽  
Energy Storage Applications ◽  
High Dielectric

High dielectric polymer nanocomposites are promising candidates for energy storage applications. The main criteria of focus are high dielectric breakdown strength, high dielectric constant and low dielectric loss. In this study, we investigate the effect of the addition of TiO2 particles to PVDF matrix on the dielectric constant, breakdown and energy density of the system. The dispersion of the particles is qualified by scanning electron microscopy (SEM). The morphology of the composites is characterized by polarized light microscopy, Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The dielectric properties are measured by a Novocontrol system with an Alpha analyzer. Finally, the breakdown measurements are carried out by a QuadTech hipot tester.

scholarly journals Assessment of Partial Discharges Evolution in Bushing by Infrared Analysis

2021 ◽  
Vol 10 (1) ◽  
pp. 18
Author(s):  
Bruno Albuquerque de Castro ◽  
Guilherme Beraldi Lucas ◽  
Gabriel Scota Fernandes ◽  
José Renato Castro Pompéia Fraga ◽  
Rudolf Ribeiro Riehl ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Power Systems ◽  
Thermal Stresses ◽  
Dielectric Breakdown ◽  
Partial Discharge ◽  
Ultra Violet ◽  
Partial Discharges ◽  
Thermal Method ◽  
Infrared Analysis ◽  
Emission Analysis

The quality of power systems is related to their capability to predict failures, avoid stoppages, and increase the lifetime of their components. Therefore, science has been developing monitoring systems to identify failures in induction motors, transformers, and transmission lines. In this context, one of the most crucial components of the electrical systems is the insulation devices such as bushings, which are constantly subjected to dust, thermal stresses, moisture, etc. These conditions promote insulation deterioration, leading to the occurrence of partial discharges. Partial discharges are localized dielectric breakdown that emits ultra-violet radiation, heat, electromagnet, and acoustics waves. The most traditional techniques to identify these flaws on bushings are based on the current, ultra high frequency, and acoustic emission analysis. However, thermal analysis stands out as a noise-resistant technique to monitor several components in the power systems. Although the thermal method is applied to detect different types of faults, such as bad contacts, overloads, etc, this technique has not been previously applied to perform partial discharge detection and evaluate its evolution on bushings. Based on this issue, this article proposes two new indexes to characterize the discharge evolution based on the infrared thermal analysis: the area ratio coefficient and the Red, Green, and Blue (RGB) ratio coefficient. Seven discharge levels were induced in a contaminated bushing, and an infrared thermal camera captured 20 images per condition, totalizing 140 images. New coefficients were used to perform the identification of discharge evolution. Results indicated that values of the new indexes increase with the partial discharge activity. Thus, the new imaging processing approach can be a promising contribution to literature, improving the reliability and maintenance planning for power transmission systems.

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

scholarly journals Dielectric Breakdown Strength and Energy Storage Density of CCTO-ZBS Electroceramic

2020 ◽  
Vol 596 ◽  
pp. 012006
Author(s):  
Muhammad Qusyairie Saari ◽  
Julie Juliewatty Mohamed ◽  
Muhammad Azwadi Sulaiman ◽  
Mohd Fariz Abd Rahman ◽  
Zainal Arifin Ahmad ◽  
...  
Keyword(s):  
Energy Storage ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Energy Storage Density ◽  
Dielectric Breakdown Strength ◽  
Storage Density
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