The numerical analysis of partial discharge activities of silicone rubber composites

Abstract This paper discussed on the partial discharge phenomenon occurs in insulating materials-based silicone rubber. In general, the partial discharges occur due to the presence of additional substances or void in the material. The methods that are used to study partial discharge are offline monitoring, online monitoring, and numerical analysis. The numerical analysis was performed on this silicone rubber compound with the introduction of three identical void with the radius of 1.15 mm. The simulation results show that the pure silicone rubber material experiences the high impact of partial discharge activities compared to the second material; microvaristor filled with silicone rubber.

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Device for online monitoring of insulation faults in high-voltage switchgears

International Journal of Distributed Sensor Networks ◽

10.1177/1550147721999284 ◽

2021 ◽

Vol 17 (2) ◽

pp. 155014772199928

Author(s):

Jiajia Song ◽

Jinbo Zhang ◽

Xinnan Fan

Keyword(s):

Fourier Transform ◽

High Voltage ◽

Online Monitoring ◽

Pulse Current ◽

Partial Discharge ◽

Current Method ◽

Capacitive Sensor ◽

Accurate Diagnosis ◽

Partial Discharges ◽

Urgent Problem

Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in the power supervision industry. In this study, a device was proposed for online monitoring of high-voltage switchgears based on pulse current method and ozone (O3) detection. The pulse current method obtains the PD signal by monitoring the phase holes on the switch indicator. Occurrence of a partial discharge in a certain phase leads to the production of a discharge pulse, which can be coupled out by a capacitive sensor. The current spectrum and the O3 produced by partial discharge were processed via fast Fourier transform for accurate diagnosis of the occurrence of partial discharge and its severity in switchgears. The proposed method allows for convenient acquisition of the partial discharge signal, simple installation of the device, and realization with inexpensive sensors.

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Foreign Inclusions, Enclosed Cavities, Partial Discharge Models and Discharge Energy: A Short Review Regarding Solid Dielectrics and Composite Insulating Systems

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.2958 ◽

2019 ◽

Vol 9 (5) ◽

pp. 4659-4666 ◽

Cited By ~ 2

Author(s):

M. Danikas ◽

S. Morsalin

Keyword(s):

Partial Discharge ◽

Short Review ◽

Partial Discharges ◽

Discharge Energy ◽

Insulating Materials ◽

Discharge Parameters ◽

Solid Dielectrics ◽

The Relationship ◽

Inception Voltage

Partial discharges in cavities are one of the main reasons of breakdown of insulating materials and insulating systems in general. The present paper aims at commenting some aspects of the relation between partial discharges and insulation damage. Some basic models explaining the workings and impacts of discharges in cavities are discussed. Discussions about the possibility of damage in the presence of multiple cavities as well as of the risks of minute discharges and/or charging phenomena below the so-called inception voltage are conducted. It is remarked that the question of the relationship between discharge parameters and insulation damage is still an important one, especially for composite insulating systems.

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Comparative Analysis versus Frequency of Inception Voltage of Partial Discharges Phenomena and Breakdown Strength, in Support of Quality Assessment of Insulating Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.437.584 ◽

2010 ◽

Vol 437 ◽

pp. 584-588

Author(s):

Romeo Cristian Ciobanu ◽

Cristina Schreiner

Keyword(s):

Comparative Analysis ◽

Quality Assessment ◽

Measurement Technique ◽

Breakdown Strength ◽

Partial Discharge ◽

Partial Discharges ◽

Insulating Materials ◽

Complementary Method ◽

Inception Voltage

The broadband Partial Discharge (PD) measurement technique may be considered more accurate than a simple breakdown test and admitted as a complementary method for characterizing the quality of porous/fibrous and composite insulating materials. It should be taken into account especially at higher frequencies, when the risk of breakdown occurrence becomes greater in time, due to the local thermal aspects.

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Performance study of RTV-2 Silicone Rubber Material For Soft Actuator by Experimental and Numerical methods: The Effect of Inflation Pressure and Wall Thickness

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.1.2020.01.0556 ◽

2020 ◽

Vol 17 (1) ◽

pp. 7524-7532 ◽

Cited By ~ 1

Author(s):

Deepak D. ◽

Nitesh Kumar ◽

Shreyas P. Shetty ◽

Saurabh Jain ◽

Manoj Bhat

Keyword(s):

Numerical Methods ◽

Wall Thickness ◽

Silicone Rubber ◽

Inflation Pressure ◽

Performance Study ◽

Rubber Material ◽

Soft Actuator ◽

Alternative Materials ◽

Load Carrying ◽

Influential Parameters

The expensive nature of currently used materials in the soft robotic industry demands the consideration of alternative materials for fabrication. This work investigates the performance of RTV-2 grade silicone rubber for fabrication of a soft actuator. Initially, a cylindrical actuator is fabricated using this material and its performance is experimentally assessed for different pressures. Further, parametric variations of the effect of wall thickness and inflation pressure are studied by numerical methods. Results show that, both wall thickness and inflation pressure are influential parameters which affect the elongation behaviour of the actuator. Thin (1.5 mm) sectioned actuators produced 76.97% more elongation compared to thick sectioned, but the stress induced is 89.61 % higher. Whereas, the thick sectioned actuator (6 mm) showed a higher load transmitting capability. With change in wall thickness from 1.5 mm to 6 mm, the elongation is reduced by 76.97 %, 38.35 %, 21.05 % and 11.43 % at pressure 100 kPa, 75 kPa, 50 kPa and 25 kPa respectively. The induced stress is also found reduced by 89.61 %, 86.66 %, 84.46 % and 68.68 % at these pressures. The average load carrying capacity of the actuator is found to be directly proportional to its wall thickness and inflation pressure.

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