Pub Date : 2019-11-01DOI: 10.1109/CATCON47128.2019.CN0023
Dayal Ch. Shill, Anu Kumar Das, S. Chatterjee
This paper presents measurement results of thermal conductivity, AC breakdown voltage, and viscosity of two types of nanofluids, viz. mineral oil based and synthetic ester based, prepared using silica nanoparticles of size less than 50 nm. The enhancement achieved in thermal conductivity was about 14% at 0.05% (w/v) of silica nanoparticles in synthetic ester while those in mineral oil based nanofluid it was 11%. The results agree well with theoretical estimate by Hamilton and Crosser Model. Although there is no change in AC breakdown voltage at initial concentration of nanoparticles up to 0.02 %( w/v), the value thereafter decreases marginally in both types of nanofluid. This may be mainly due to increase in viscosity at higher nanoparticle concentration level. Overall, it has been found that there has been a maximum and positive influence on the thermal conductivity of the dielectric fluids due to nanoparticle dispersion.
{"title":"Measuring Electro-Thermo-Physical Properties of Mineral and Synthetic Ester Based Dielectric Fluid Dispersed with Silica Nanoparticles","authors":"Dayal Ch. Shill, Anu Kumar Das, S. Chatterjee","doi":"10.1109/CATCON47128.2019.CN0023","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0023","url":null,"abstract":"This paper presents measurement results of thermal conductivity, AC breakdown voltage, and viscosity of two types of nanofluids, viz. mineral oil based and synthetic ester based, prepared using silica nanoparticles of size less than 50 nm. The enhancement achieved in thermal conductivity was about 14% at 0.05% (w/v) of silica nanoparticles in synthetic ester while those in mineral oil based nanofluid it was 11%. The results agree well with theoretical estimate by Hamilton and Crosser Model. Although there is no change in AC breakdown voltage at initial concentration of nanoparticles up to 0.02 %( w/v), the value thereafter decreases marginally in both types of nanofluid. This may be mainly due to increase in viscosity at higher nanoparticle concentration level. Overall, it has been found that there has been a maximum and positive influence on the thermal conductivity of the dielectric fluids due to nanoparticle dispersion.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"98 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":"122817858","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.CN0007
Bidhan Biswas, N. Bharadwaj, L. Satish
The authors’ research group established in 2011 that series capacitance of a single, uniform, isolated transformer winding was indirectly measurable via the frequency response measurement. The present work is a sequel and proposes a relatively simpler estimation method. It is based on exploiting a unique property of the first few coefficients (viz., s0, s1, and s2 terms) of the numerator and denominator polynomial of the driving point impedance (DPI) function, which is determined by curve-fitting the measured frequency response data. Essentially, the method solves a set of simultaneous equations which are formulated by equating pertinent coefficients of the fitted DPI(s) to the corresponding coefficients of the generalized expressions computed for an N-section ladder network. Going further, it is shown how the measured DPI data corresponding to the neutral-open and neutral-short cases can be usefully employed to cross-validate the estimated series capacitance. Experimental results on three different windings (viz., 2.2 kV/70 kVA continuous-disc, 33 kV/3.5 MVA continuous-disc, and a fully interleaved-disc) are presented to demonstrate the method’s feasibility.
{"title":"Estimation of Series Capacitance of an Actual, Uniform, Single, Isolated Transformer Winding from Measured Driving Point Impedance Data","authors":"Bidhan Biswas, N. Bharadwaj, L. Satish","doi":"10.1109/CATCON47128.2019.CN0007","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0007","url":null,"abstract":"The authors’ research group established in 2011 that series capacitance of a single, uniform, isolated transformer winding was indirectly measurable via the frequency response measurement. The present work is a sequel and proposes a relatively simpler estimation method. It is based on exploiting a unique property of the first few coefficients (viz., s0, s1, and s2 terms) of the numerator and denominator polynomial of the driving point impedance (DPI) function, which is determined by curve-fitting the measured frequency response data. Essentially, the method solves a set of simultaneous equations which are formulated by equating pertinent coefficients of the fitted DPI(s) to the corresponding coefficients of the generalized expressions computed for an N-section ladder network. Going further, it is shown how the measured DPI data corresponding to the neutral-open and neutral-short cases can be usefully employed to cross-validate the estimated series capacitance. Experimental results on three different windings (viz., 2.2 kV/70 kVA continuous-disc, 33 kV/3.5 MVA continuous-disc, and a fully interleaved-disc) are presented to demonstrate the method’s feasibility.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"2 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":"126098394","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.CN0010
Ajith John Thomas, C. Reddy
In this paper, dc electrical treeing breakdown experiments are conducted using needle-plane system. Electrical treeing test can be used for the assessment of life estimation of the insulating material by estimating the voltage endurance coefficient and accumulated damage. Damage equalization method (DEM) is used for estimating the life of the dielectric material used in HVDC cables. Breakdown experiments are conducted with progressive voltage steps of different step size. Interesting new results on the role of different step size on breakdown voltage is reported which in turn shows the effect of space charge injection and accumulation. The results from the space charge distribution in a plane-plane geometry justify the authors’ results on the effect step size on dc breakdown in needle-plane geometry. The experimental results obtained are compared with data available in the literature for ac electrical treeing tests for different rate of progressive voltage rise.
{"title":"Effect of Step Duration on Breakdown in Needle-Plane Geometry Under DC Step Voltages","authors":"Ajith John Thomas, C. Reddy","doi":"10.1109/CATCON47128.2019.CN0010","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0010","url":null,"abstract":"In this paper, dc electrical treeing breakdown experiments are conducted using needle-plane system. Electrical treeing test can be used for the assessment of life estimation of the insulating material by estimating the voltage endurance coefficient and accumulated damage. Damage equalization method (DEM) is used for estimating the life of the dielectric material used in HVDC cables. Breakdown experiments are conducted with progressive voltage steps of different step size. Interesting new results on the role of different step size on breakdown voltage is reported which in turn shows the effect of space charge injection and accumulation. The results from the space charge distribution in a plane-plane geometry justify the authors’ results on the effect step size on dc breakdown in needle-plane geometry. The experimental results obtained are compared with data available in the literature for ac electrical treeing tests for different rate of progressive voltage rise.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"95 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":"133769911","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.PID6178475
Kalinda D. Patekar, Bhoopesh Chaudhry
In electrical power system transformers are the most important elements. Any fault or damage in Transformer may interrupt continuous operation of electrical power system, as well as incur the expensive repair cost. Thus, it is necessary to conduct periodic inspections and maintenance for detection of incipient faults in power transformer to improve efficiency. Various off-line and on-line oil tests for fault diagnoses of power transformers are perform periodically as per expert recommendation. A number of standards have evolved over the time on transformer loading and power transformer fault diagnosis to minimize unplanned outages. Dissolve gas analysis is successful technique for identifying the incipient fault in a power transformer by analyzing ratios of dissolved gas concentrations arising from the deterioration of transformer liquid/solid insulations.In this paper multi layer perceptron type of artificial neural network is used with DGA methods to improve the reliability, efficiency and to increase power transformer life period. There is always problem in fault interpretation of multi Classification. ANN automatically tune the network Parameters, connection weights and bias terms of the neural networks to achieve the best model based on the proposed evolutionary algorithm, which provides the solution for complex classification problems DGA method find faults but during complexclassification it cannot give accurate results. To avoid such a conditions ANN is used with DGA in power transformer .
{"title":"DGA analysis of transformer using Artificial neutral network to improve reliability in Power Transformers","authors":"Kalinda D. Patekar, Bhoopesh Chaudhry","doi":"10.1109/CATCON47128.2019.PID6178475","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.PID6178475","url":null,"abstract":"In electrical power system transformers are the most important elements. Any fault or damage in Transformer may interrupt continuous operation of electrical power system, as well as incur the expensive repair cost. Thus, it is necessary to conduct periodic inspections and maintenance for detection of incipient faults in power transformer to improve efficiency. Various off-line and on-line oil tests for fault diagnoses of power transformers are perform periodically as per expert recommendation. A number of standards have evolved over the time on transformer loading and power transformer fault diagnosis to minimize unplanned outages. Dissolve gas analysis is successful technique for identifying the incipient fault in a power transformer by analyzing ratios of dissolved gas concentrations arising from the deterioration of transformer liquid/solid insulations.In this paper multi layer perceptron type of artificial neural network is used with DGA methods to improve the reliability, efficiency and to increase power transformer life period. There is always problem in fault interpretation of multi Classification. ANN automatically tune the network Parameters, connection weights and bias terms of the neural networks to achieve the best model based on the proposed evolutionary algorithm, which provides the solution for complex classification problems DGA method find faults but during complexclassification it cannot give accurate results. To avoid such a conditions ANN is used with DGA in power transformer .","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"63 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":"128129298","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.CN0006
D. Sathyamoorthy, C. Reddy
Ageing is a slow process of degradation of dielectric properties of cable insulation operating at high thermal stress. Prolonged thermal stress gradually weakens the insulation and ultimately leads to failure. Therefore, ageing studies are important for the design of insulation for high voltage power apparatus. One of the important properties of insulation is the resistivity of the material, especially for use in DC systems. In this paper, the authors have considered volume resistivity as a parameter to identify the changes with respect to ageing time. The ageing of insulation, change in volume resistivity and V-t characteristics are believed to be related. A batch of fresh LDPE samples was subjected to thermal stress for different time durations and the volume resistivity and permittivity of each of the samples had been measured under different electric fields. The variation in volume resistivity was analyzed experimentally and theoretically. An attempt has been made to relate endurance coefficient to changes in resistivity. Endurance coefficient has been estimated using volume resistivity.
{"title":"An Attempt to Estimate DC Endurance Coefficient from Volume Resistivity","authors":"D. Sathyamoorthy, C. Reddy","doi":"10.1109/CATCON47128.2019.CN0006","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0006","url":null,"abstract":"Ageing is a slow process of degradation of dielectric properties of cable insulation operating at high thermal stress. Prolonged thermal stress gradually weakens the insulation and ultimately leads to failure. Therefore, ageing studies are important for the design of insulation for high voltage power apparatus. One of the important properties of insulation is the resistivity of the material, especially for use in DC systems. In this paper, the authors have considered volume resistivity as a parameter to identify the changes with respect to ageing time. The ageing of insulation, change in volume resistivity and V-t characteristics are believed to be related. A batch of fresh LDPE samples was subjected to thermal stress for different time durations and the volume resistivity and permittivity of each of the samples had been measured under different electric fields. The variation in volume resistivity was analyzed experimentally and theoretically. An attempt has been made to relate endurance coefficient to changes in resistivity. Endurance coefficient has been estimated using volume resistivity.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"108 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":"121129071","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.CN00113
K. Kumar, P. P., S. Dalai, B. Chatterjee
Condition assessment allows us to identify the insulation failure which may further lead to hardware failure. By using condition assessment, maintenance can be done in a scheduled manner or some other precautions can be taken up to avoid the failure. The observation and analysis of the dc conductivity and dielectric response function is a feasible way to diagnose the main insulation condition, and the same applied for epoxy insulation. This PDC work, is focussed on polarization and depolarization current measurement which can be used for evaluating the quality of epoxy insulation. This technique is a time domain based method for evaluating the conductivity of insulation and moisture content in solid insulation materials. This work presents a description of the PDC measurement technique with the quantitative modelling of epoxy insulation used. A relation is established among the equivalent circuit model parameter of the epoxy insulation and the dissipation factor of this insulation. By knowing the equivalent circuit parameter from the depolarization current of epoxy insulation, the conductivity and dissipation factor is obtained which is observed to be increasing with respect to the increasing thermal aging duration.
{"title":"Condition Assessment of Epoxy Nanocomposites Using Polarization and Depolarization Current","authors":"K. Kumar, P. P., S. Dalai, B. Chatterjee","doi":"10.1109/CATCON47128.2019.CN00113","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN00113","url":null,"abstract":"Condition assessment allows us to identify the insulation failure which may further lead to hardware failure. By using condition assessment, maintenance can be done in a scheduled manner or some other precautions can be taken up to avoid the failure. The observation and analysis of the dc conductivity and dielectric response function is a feasible way to diagnose the main insulation condition, and the same applied for epoxy insulation. This PDC work, is focussed on polarization and depolarization current measurement which can be used for evaluating the quality of epoxy insulation. This technique is a time domain based method for evaluating the conductivity of insulation and moisture content in solid insulation materials. This work presents a description of the PDC measurement technique with the quantitative modelling of epoxy insulation used. A relation is established among the equivalent circuit model parameter of the epoxy insulation and the dissipation factor of this insulation. By knowing the equivalent circuit parameter from the depolarization current of epoxy insulation, the conductivity and dissipation factor is obtained which is observed to be increasing with respect to the increasing thermal aging duration.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"70 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":"126172449","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.CN0014
Lekshmi A. Kaimal, H. Bahirat, P. Vaidya, S. V. Kulkarni
The processes of inception, growth, and propagation of Partial Discharge (PD) along the dielectric are complicated. Their analysis requires a thorough understanding of underlying physics. A software simulation tool has been developed to study typical PD processes. The simulator generates pulses of varying amplitudes, shapes and time of occurrence of pulses observed in practice using National Instruments LabVIEW software as a base platform. The rise time of PD pulses plays an important role in the characterization of PD. The rise time formulation has been attempted based on the approach using the dipole moment development and law of conservation of energy. PD phenomenon is usually studied with the assumption of an air-filled void being energized by parallel plate/ coaxial cylinder electrode configuration. An SF6-filled spherical void inside a dielectric between two coaxial cylinder electrode plates is used as another configuration. Phase-resolved partial discharge (PRPD) pattern and the characteristics of PD pulses simulated are in agreement with results reported in literature. The contribution of this paper is versatility of the simulator for detailed study and comprehensive analysis of PD without the use of high voltage (HV) setup.
{"title":"Design of a Universal Partial Discharge Simulator","authors":"Lekshmi A. Kaimal, H. Bahirat, P. Vaidya, S. V. Kulkarni","doi":"10.1109/CATCON47128.2019.CN0014","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0014","url":null,"abstract":"The processes of inception, growth, and propagation of Partial Discharge (PD) along the dielectric are complicated. Their analysis requires a thorough understanding of underlying physics. A software simulation tool has been developed to study typical PD processes. The simulator generates pulses of varying amplitudes, shapes and time of occurrence of pulses observed in practice using National Instruments LabVIEW software as a base platform. The rise time of PD pulses plays an important role in the characterization of PD. The rise time formulation has been attempted based on the approach using the dipole moment development and law of conservation of energy. PD phenomenon is usually studied with the assumption of an air-filled void being energized by parallel plate/ coaxial cylinder electrode configuration. An SF6-filled spherical void inside a dielectric between two coaxial cylinder electrode plates is used as another configuration. Phase-resolved partial discharge (PRPD) pattern and the characteristics of PD pulses simulated are in agreement with results reported in literature. The contribution of this paper is versatility of the simulator for detailed study and comprehensive analysis of PD without the use of high voltage (HV) setup.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"36 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":"116654289","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.CN0062
P. K. Panda, Naushad Ali, G. Savla, Venkatesh D, Ranjan Kumar, H. Mishra
Electrical wiring systems are being reported as causes of initiation of fire in residential and commercial establishments. Electrical appliances in these establishments like houses, hotels, hostels or hospitals etc. are predominantly low tension single phase driven loads. These applications normally distribute power through single core wiring system protected by miniature circuit breakers (MCB). These MCBs are only devices in wiring system relied upon to de-energise the partial or entire system before onset of overheating leading to fire. A factory calibrated MCB of a new system can be relied upon. However, over the duration the protection system degrades gradually on its own or due to un-engineered modifications and ability to detect or isolate overcurrent is reduced or lost. Analysis of electrical fire events attributes various reasons ranging from user negligence to design inadequacy. However in many cases the spread of fire outside electrical system precedes with failure of the protecting MCB to detect and isolate the overload or short circuit condition. This paper proposes a periodic testing procedure and an instrument to ensure MCBs are ready to detect the fault and de-energise the circuit.
{"title":"Handheld smart simulator for in situ testing of MCB and switch gear","authors":"P. K. Panda, Naushad Ali, G. Savla, Venkatesh D, Ranjan Kumar, H. Mishra","doi":"10.1109/CATCON47128.2019.CN0062","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0062","url":null,"abstract":"Electrical wiring systems are being reported as causes of initiation of fire in residential and commercial establishments. Electrical appliances in these establishments like houses, hotels, hostels or hospitals etc. are predominantly low tension single phase driven loads. These applications normally distribute power through single core wiring system protected by miniature circuit breakers (MCB). These MCBs are only devices in wiring system relied upon to de-energise the partial or entire system before onset of overheating leading to fire. A factory calibrated MCB of a new system can be relied upon. However, over the duration the protection system degrades gradually on its own or due to un-engineered modifications and ability to detect or isolate overcurrent is reduced or lost. Analysis of electrical fire events attributes various reasons ranging from user negligence to design inadequacy. However in many cases the spread of fire outside electrical system precedes with failure of the protecting MCB to detect and isolate the overload or short circuit condition. This paper proposes a periodic testing procedure and an instrument to ensure MCBs are ready to detect the fault and de-energise the circuit.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"30 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":"128103964","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.CN0032
P. Thomas
Synthetic esters that are readily biodegradable have attracted attention as an alternative to mineral oil for transformer applications. Researchers have focused on the development of nanofluids; especially synthetic esters based nanofluids are being developed for the next generation insulating fluids. In the current investigation, synthetic ester based MgO nanofluids with various weight percent (0.001 to 0.005 wt %) of MgO nano particles were prepared under ultrasonication. The effect of MgO nanoparticles on the AC breakdown voltage (BDV), loss tangent, and gassing tendency of synthetic esters were studied in detail. The synthetic ester based MgO nanofluids, besides showing enhanced electric breakdown, also shows improvement gassing tendency behavior. Positive response on the gassing tendency was observed for the nanofluids. The synthetic ester based MgO nanofluids can be preferred as an alternative medium for power transformer insulation with reduced size to the conventionally used petroleum based mineral oil.
{"title":"Breakdown Voltage and Gassing Tendency of Synthetic Esters Based MgO Nanofluids","authors":"P. Thomas","doi":"10.1109/CATCON47128.2019.CN0032","DOIUrl":"https://doi.org/10.1109/CATCON47128.2019.CN0032","url":null,"abstract":"Synthetic esters that are readily biodegradable have attracted attention as an alternative to mineral oil for transformer applications. Researchers have focused on the development of nanofluids; especially synthetic esters based nanofluids are being developed for the next generation insulating fluids. In the current investigation, synthetic ester based MgO nanofluids with various weight percent (0.001 to 0.005 wt %) of MgO nano particles were prepared under ultrasonication. The effect of MgO nanoparticles on the AC breakdown voltage (BDV), loss tangent, and gassing tendency of synthetic esters were studied in detail. The synthetic ester based MgO nanofluids, besides showing enhanced electric breakdown, also shows improvement gassing tendency behavior. Positive response on the gassing tendency was observed for the nanofluids. The synthetic ester based MgO nanofluids can be preferred as an alternative medium for power transformer insulation with reduced size to the conventionally used petroleum based mineral oil.","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"26 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":"133313183","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/catcon47128.2019.9079355
{"title":"CATCON 2019 Cover Page","authors":"","doi":"10.1109/catcon47128.2019.9079355","DOIUrl":"https://doi.org/10.1109/catcon47128.2019.9079355","url":null,"abstract":"","PeriodicalId":183797,"journal":{"name":"2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"59 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":"116396544","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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