2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)最新文献_第7页

Optimisation of a Membrane Based Piezoelectric Vibrational Energy Harvester for High Output Power and Low-Frequency Operations 高输出功率低频工作的薄膜压电振动能量收集器的优化设计

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670540

N. A., S. K J, V. Seena

{"title":"Optimisation of a Membrane Based Piezoelectric Vibrational Energy Harvester for High Output Power and Low-Frequency Operations","authors":"N. A., S. K J, V. Seena","doi":"10.1109/catcon52335.2021.9670540","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670540","url":null,"abstract":"Low power electronic devices and sensors as part of wireless sensor networks demand an independent self-powered source of energy typically through reliable energy scavenging methods. Micro electro-mechanical system (MEMS)-based Vibrational Energy Harvesting (VEH) with the cantilever-based design is proved to be a potential source. Apart from cantilevers, other MEMS structures like membranes can act as a wideband vibrational energy harvester because it provides a broader resonant peak as compared to cantilever beams. This paper presents a MEMS piezoelectric vibration energy harvester (PVEH) with circular membrane architecture. The effects of membrane diameter and the proof mass diameter on the resonant frequency are analysed. Optimisation of the diameters of the outer membrane and proof mass are carried out. For the first time, the optimum ratio of membrane diameter to proof mass diameter for designing the energy harvester with the least resonant frequency is reported here. Here Aluminum Nitride (AlN) is used as the piezoelectric material.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114470554","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}

引用次数: 3

Comparison of Light Sensors for Arc Detection inside Power Transformer Tanks : Basic Investigations 电力变压器箱内电弧检测光传感器的比较:基础研究

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670521

M. Kuhnke, R. Sargazi, P. Werle

{"title":"Comparison of Light Sensors for Arc Detection inside Power Transformer Tanks : Basic Investigations","authors":"M. Kuhnke, R. Sargazi, P. Werle","doi":"10.1109/catcon52335.2021.9670521","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670521","url":null,"abstract":"Transformer explosions and fires are the most dangerous consequences of transformer faults. Besides the financial loss, consequences are often environmental pollution, fires and personal injury or even death. Especially for substations in densely populated areas, this is a very high risk. As protection each transformer is equipped with a Buchholzrelay (BHR), which identifies such failures, thus a circuit breaker (CB) can trip the transformer. The time between the internal breakdown and the disconnection of the transformer is approximately 4-5 cycles, which are almost equally split between the response times of the BHR and the CB. However, in some cases the tripping of the transformer is not fast enough in order to prevent a tank rupture and the catastrophic collateral damages described above. Therefore faster arc detection systems are under investigation like the use of photo sensitive semiconductors inside the transformer tank to detect the light emission from an arc and to trigger the circuit breaker. Currently, there are many unanswered questions about the reliability, sensitivity, operating temperatures and lifespan of these new optic systems. In this paper the characteristics of different light sensitive semiconductors, such as light dependent resistors, and photodiodes are compared in regard to their possible application inside power transformers. Moreover, performance of certain measuring circuits with the different semiconductors are presented and compared at different distances to an arc with temperature variation. Finally, the advantages and disadvantages of the different semiconductor types, and the benefits and limits of arc sensing with light sensors are discussed.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116292503","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}

引用次数: 1

Optimization of Electric Field Distribution for 33kV Polymeric Insulator Using Non-linear Field Grading Composites 用非线性场分级复合材料优化33kV聚合物绝缘子电场分布

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670475

M-Ramez Halloum, S. Reddy B., Youssef Razouk

{"title":"Optimization of Electric Field Distribution for 33kV Polymeric Insulator Using Non-linear Field Grading Composites","authors":"M-Ramez Halloum, S. Reddy B., Youssef Razouk","doi":"10.1109/catcon52335.2021.9670475","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670475","url":null,"abstract":"This study investigates non-linear resistive field grading composites based on Zinc Oxide microvaristors to optimize the distribution of the electric field along a 33 kV composite insulator. In this study, the effect of different switching parameters of field grading composites such as field switching threshold, non-linearity coefficient, and the initial conductivity on the field distribution is presented. A suitable design of field grading composites is proposed for effective stress control near end-fittings and along the insulator surface. The proposed graded insulator is evaluated with the optimized switching parameters using COMSOL Multiphysics 5.5 and 2D axisymmetric models. Electric field enhancements at the triple junction points at both terminals are successfully suppressed. This consequently decreases the probability of corona and electric surface discharges, reduces the possibility of dry bands formation, raises the flashover voltage, and improves the long-term operation of the polymeric insulators in service.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114078651","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}

引用次数: 0

An Investigation and locating Water tree degradation in Power Cable Insulation based on Pulse Voltage 基于脉冲电压的电力电缆绝缘水树退化的研究与定位

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670483

Priya Selvamany, G. Varadarajan

{"title":"An Investigation and locating Water tree degradation in Power Cable Insulation based on Pulse Voltage","authors":"Priya Selvamany, G. Varadarajan","doi":"10.1109/catcon52335.2021.9670483","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670483","url":null,"abstract":"Water-tree is a serious problem in the underground power cables due to degradation mechanism. Therefore, it is progressively significant to study the effect of water-tree by modeling vented trees at the outer and inner surface of the insulation. The existence of a vented water tree is the common fault in aged cable leading to cable deterioration. Hence, the precise model emphasizes water trees using the Finite element method (FEM) under different levels of growth in insulation. Diagnostic techniques are still needed to enable the estimation of the level of damage present within a cable. This paper reported about the power cable current scenario of diagnostics method for pulse voltage application on 33 kV cross-linked polyethylene (XLPE) insulated cable used as a simulation model. Therefore, the propagation of high-frequency pulse within the cable that undergoes reflections from water trees could be investigated and its velocity of propagation was explored. The water tree lumped parameters are simulated and calculated analytically at different levels of growth across the insulation. Consequently, the diagnostics method developed by the way of the proper approach to detect water-tree based on charge intensity in electrical power cables.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132202915","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}

引用次数: 0

Development of an FEM based approach for Estimation of Leakage Reactance in Multi-Winding Rectifier Transformers and Experimental Verification 基于FEM的多绕组整流变压器漏抗估算方法的发展及实验验证

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670484

Jineeth Joseph, K. Nair, R. Krishnan, Mahesh B. Varrier

{"title":"Development of an FEM based approach for Estimation of Leakage Reactance in Multi-Winding Rectifier Transformers and Experimental Verification","authors":"Jineeth Joseph, K. Nair, R. Krishnan, Mahesh B. Varrier","doi":"10.1109/catcon52335.2021.9670484","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670484","url":null,"abstract":"This paper presents the development of a Finite Element Method (FEM) based approach for estimation of leakage reactance in a rectifier transformer. The winding design features of rectifier transformer demands the inclusion of multiple windings and the 18 pulse rectifier transformer consists of three high voltage windings and three low voltage windings. The estimation of leakage reactance prior to the manufacture of multi-winding transformers is a challenging task in the transformer industry. This work attempts to develop a Finite Element Method (FEM) based model for calculation of leakage reactance of rectifier transformer in ANSYS software. The simulation of the model with different excitation conditions are done, the total energy is obtained and is used to obtain the leakage reactance of transformer for each case. The experimental measurement of leakage reactance of transformer for different excitation conditions is done and the results show a good agreement with the simulation results for each case. Thus the proposed FEM based scheme for estimation of leakage reactance in rectifier transformers is reliable for estimation of leakage reactance of new design of rectifier transformers.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127169683","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}

引用次数: 1

Time-frequency Vibration Characteristics Analysis of Disconnectors of GIS Equipment with Poor Contact Mechanical Defect 接触不良机械缺陷GIS设备分离器时频振动特性分析

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670481

Hui Xu, Chujun Meng, Qinqing Huang, Chuanxian Luo, Jing Zhang, Zhixiang Liu

{"title":"Time-frequency Vibration Characteristics Analysis of Disconnectors of GIS Equipment with Poor Contact Mechanical Defect","authors":"Hui Xu, Chujun Meng, Qinqing Huang, Chuanxian Luo, Jing Zhang, Zhixiang Liu","doi":"10.1109/catcon52335.2021.9670481","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670481","url":null,"abstract":"GIS equipment disconnector is the valve of the power system, and its mechanical vibration defect is a key factor that threatens the safe operation of the power grid. Based on the GIS equipment platform, this paper carried out the simulation of the mechanical vibration defects of the disconnector in different contact states, and compared and analyzed the evolution law of the time-frequency domain vibration map under the combined action of different load currents and the severity of the defects. The results show that the vibration response amplitude of the disconnector when the contact is poor is significantly larger than that in the normal state. As the severity of the defect increases, its frequency response band gradually widens, and there is a clear super-harmonic response near 1500 Hz. The feature analysis algorithm for the vibration signal can effectively characterize the degree of deterioration of the contact state of the disconnector. The more serious the defect, the higher the energy level of the signal, while the kurtosis and unevenness coefficient also increase significantly.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121514315","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}

引用次数: 2

Failure Analysis of Medium Voltage Single Bonded Cable System 中压单键电缆系统失效分析

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670471

Thirumurthy, S. V, M. P, Raja G K, A. R

{"title":"Failure Analysis of Medium Voltage Single Bonded Cable System","authors":"Thirumurthy, S. V, M. P, Raja G K, A. R","doi":"10.1109/catcon52335.2021.9670471","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670471","url":null,"abstract":"Presently Process Industries and Utilities are extensively using XLPE power cables in medium voltage sector for distribution of power. As the current requirements of Process Industries are high and route lengths are in the range 1 to 2 kilometers, Single point bonded system is generally adopted to reduce the overheating of cables. Failures are reported from such bonded medium voltage cables due to improper design and installation. In addition, occurrence of external damage on such medium voltage cables during laying and installation, is also causing failures. Proper analysis of such failures is mandatory to develop better maintenance and installation practices which can avert unexpected failure in the system. Even though it is very difficult to ascertain the failure cause from the failure spot, it is possible to analyze the failure by thorough inspection of the failed piece of cable by dissection and further checking the nearby cables. Here in this paper, a detailed investigation carried out on the failure analysis of a single core 1000 sq.mm medium voltage cable is highlighted.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115161400","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}

引用次数: 0

Investigating the effect of vacuum impregnation of supercapacitor electrode in electrolyte 研究了电解液中真空浸渍对超级电容器电极的影响

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670508

Kingshuk Chatterjee, P. K. Agnihotri, N. Gupta

{"title":"Investigating the effect of vacuum impregnation of supercapacitor electrode in electrolyte","authors":"Kingshuk Chatterjee, P. K. Agnihotri, N. Gupta","doi":"10.1109/catcon52335.2021.9670508","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670508","url":null,"abstract":"Supercapacitors provide much higher power density than conventional batteries, while providing comparable energy density. Generally, porous materials like activated carbon, carbon nanotubes etc. are used to fabricate supercapacitor electrodes. A critical factor influencing the performance of the supercapacitor is the effective surface area of the porous electrode accessed by the electrolyte ions. The electrode micro-structure, the size of the electrolytic ions, etc. influence the effective surface area. It is hypothesized that due to the presence of air bubbles in the finer pores of the electrode, the electrolyte ions are unable to access the electrode surface easily. In the present work, the effect of vacuum impregnation of the electrode in improving the effective surface area is investigated. Activated carbon-based supercapacitor electrodes are fabricated and characterized by electrochemical techniques, before and after vacuum impregnation. Vacuum impregnation is seen to result in higher energy density but lower power density, and this is thought to be linked to easier access to deeper and finer pores on the electrode surface.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121889507","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}

引用次数: 0