Pub Date : 2019-11-01DOI: 10.1109/CATCON47128.2019.CN0017
Shyamsundar Jena, S. Shrotriya, M. Pande, G. Joshi
A modified non-contact type radar level sensor has been designed for liquid level measurement in a highly aggressive process environment. This paper describes details of various components of this sensor set up and its optimized design results achieved after iterations.
{"title":"Design of a modified radar sensor for liquid level measurement and monitoring","authors":"Shyamsundar Jena, S. Shrotriya, M. Pande, G. Joshi","doi":"10.1109/CATCON47128.2019.CN0017","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0017","url":null,"abstract":"A modified non-contact type radar level sensor has been designed for liquid level measurement in a highly aggressive process environment. This paper describes details of various components of this sensor set up and its optimized design results achieved after iterations.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125107033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/CATCON47128.2019.CN0061
V. S, Deepika, Vasudha Hegde, Veda Sandeep Nagaraj, H. Suresh, G. A
A MEMS based acoustic sensor that combines high sensitivity, wide frequency range and low cost batch processed miniaturized silicon components to build self powered systems is presented in this paper. It also throws light on an effective method to monitor health of a machine which is by using an piezoelectric Mems microphone. The proposed Acoustic sensor consists of a sputtered piezoelectric ZnO layer that transforms the mechanical deflection of a thin-etched-Si diaphragm into a piezoelectric charge. This ZnO layer is sandwiched between bottom Al electrode and top Al electrode. The simulations of the proposed acoustic sensor is carried out for two designs i) The piezoelectric material being placed at the 4 corners of the silicon substrate and ii) The piezoelectric material being placed at centre of the silicon substrate. The thickness of the layers are chosen so as to withstand the dynamic sound pressure of 96-106db and it produces maximum of 8pV/Pa. The simulation is done by Comsol multiphysics and Coventorware.
{"title":"Design and Simulation of Mems based Piezoelectric Acoustic sensor","authors":"V. S, Deepika, Vasudha Hegde, Veda Sandeep Nagaraj, H. Suresh, G. A","doi":"10.1109/CATCON47128.2019.CN0061","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0061","url":null,"abstract":"A MEMS based acoustic sensor that combines high sensitivity, wide frequency range and low cost batch processed miniaturized silicon components to build self powered systems is presented in this paper. It also throws light on an effective method to monitor health of a machine which is by using an piezoelectric Mems microphone. The proposed Acoustic sensor consists of a sputtered piezoelectric ZnO layer that transforms the mechanical deflection of a thin-etched-Si diaphragm into a piezoelectric charge. This ZnO layer is sandwiched between bottom Al electrode and top Al electrode. The simulations of the proposed acoustic sensor is carried out for two designs i) The piezoelectric material being placed at the 4 corners of the silicon substrate and ii) The piezoelectric material being placed at centre of the silicon substrate. The thickness of the layers are chosen so as to withstand the dynamic sound pressure of 96-106db and it produces maximum of 8pV/Pa. The simulation is done by Comsol multiphysics and Coventorware.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129162801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/CATCON47128.2019.CN0090
D. K. Puhan, Rajat Sharma, K. R, B. N. Rao
Partial discharge in high voltage equipment like generators, motors, transformers, power cables etc. occur due to various manufacturing defect sites or due to aging of the insulation under various stresses. Occurrence of surface discharges at the termination of cables, end winding of stator bars, surface discharges along the supporting insulators in case of gas insulated systems are common. Prolonged partial discharge activity may lead to breakdown of the insulation resulting in forced outages and financial implications. Partial discharge measurement is a promising tool for detection of incipient faults in power equipment. This paper presents a novel optoelectronic technique for detecting air corona, surface discharges at cable termination and end windings of stator coil. A laboratory investigation was carried out in controlled conditions to understand the detection capability of optoelectronic technique for these types of discharges. An experimental setup consisting of collimating lens, fluorescent optical fiber, common optical fiber cable, fiber optic coupler, photomultiplier tube modules and pc-based oscilloscope for data acquisition was designed and used for measurements. The results are presented and discussed.
{"title":"Application of Optoelectronic Technique for Detection of Air Corona, Surface Discharges at Cable Termination and End winding of Stator Coil","authors":"D. K. Puhan, Rajat Sharma, K. R, B. N. Rao","doi":"10.1109/CATCON47128.2019.CN0090","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0090","url":null,"abstract":"Partial discharge in high voltage equipment like generators, motors, transformers, power cables etc. occur due to various manufacturing defect sites or due to aging of the insulation under various stresses. Occurrence of surface discharges at the termination of cables, end winding of stator bars, surface discharges along the supporting insulators in case of gas insulated systems are common. Prolonged partial discharge activity may lead to breakdown of the insulation resulting in forced outages and financial implications. Partial discharge measurement is a promising tool for detection of incipient faults in power equipment. This paper presents a novel optoelectronic technique for detecting air corona, surface discharges at cable termination and end windings of stator coil. A laboratory investigation was carried out in controlled conditions to understand the detection capability of optoelectronic technique for these types of discharges. An experimental setup consisting of collimating lens, fluorescent optical fiber, common optical fiber cable, fiber optic coupler, photomultiplier tube modules and pc-based oscilloscope for data acquisition was designed and used for measurements. The results are presented and discussed.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"59 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127380171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-01DOI: 10.1109/CATCON47128.2019.CN0038
Anjali Uppal, Ritika Agarwal, Pavitra Sharma, Jeyabalan Velandy, C. Narasimhan, Girish A Morde
Ester oils are considered as suitable substitutes for conventional mineral oil for transformer applications due to good environmental performance and higher fire point compared to mineral oils. The electronegative property of the oxygen atom in the ester oil group makes ester oil more polar than mineral oil. Ester oils also have higher permittivity and lower resistivity with respect to mineral oil. Hence, it would be of interest to predict the influence of polar contamination in a non-polar nature of mineral oil. In this paper, 10% of natural ester oil is mixed as a polar contaminant in mineral oil to evaluate its effect on AC dielectric strength. Initially, AC dielectric strength of mineral oils and natural ester oil are predicted as a reference for various oil gaps under power frequency voltage conditions. Both naphthenic and paraffinic based mineral oil grade (uninhibited and inhibited oils) are utilized to consider the effect of inhibitors and aromatic contents of mineral oil in natural ester oil on AC dielectric strength. The breakdown voltages are determined by rising voltage method for nonuniform field (Sphere-needle) configurations. Weibull distribution functions are used to analyze the experimental data and to estimate the breakdown voltage with risk of 1% failure probability. Finally, finite element method (FEM) is used to predict the maximum stress in mineral oil, natural ester oil and mixture oil.
{"title":"Effect of dielectric strength of mineral oil on mixing with a natural ester oil as a polar contaminant under AC stress","authors":"Anjali Uppal, Ritika Agarwal, Pavitra Sharma, Jeyabalan Velandy, C. Narasimhan, Girish A Morde","doi":"10.1109/CATCON47128.2019.CN0038","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0038","url":null,"abstract":"Ester oils are considered as suitable substitutes for conventional mineral oil for transformer applications due to good environmental performance and higher fire point compared to mineral oils. The electronegative property of the oxygen atom in the ester oil group makes ester oil more polar than mineral oil. Ester oils also have higher permittivity and lower resistivity with respect to mineral oil. Hence, it would be of interest to predict the influence of polar contamination in a non-polar nature of mineral oil. In this paper, 10% of natural ester oil is mixed as a polar contaminant in mineral oil to evaluate its effect on AC dielectric strength. Initially, AC dielectric strength of mineral oils and natural ester oil are predicted as a reference for various oil gaps under power frequency voltage conditions. Both naphthenic and paraffinic based mineral oil grade (uninhibited and inhibited oils) are utilized to consider the effect of inhibitors and aromatic contents of mineral oil in natural ester oil on AC dielectric strength. The breakdown voltages are determined by rising voltage method for nonuniform field (Sphere-needle) configurations. Weibull distribution functions are used to analyze the experimental data and to estimate the breakdown voltage with risk of 1% failure probability. Finally, finite element method (FEM) is used to predict the maximum stress in mineral oil, natural ester oil and mixture oil.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126363170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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