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

Estimating The Effect of Axial Displacement on Equivalent Circuit Parameters of Transformer Winding Using Finite Element Method 用有限元法估算轴向位移对变压器绕组等效电路参数的影响

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670500

P. Saji, A. Muhammed, V. V.

{"title":"Estimating The Effect of Axial Displacement on Equivalent Circuit Parameters of Transformer Winding Using Finite Element Method","authors":"P. Saji, A. Muhammed, V. V.","doi":"10.1109/catcon52335.2021.9670500","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670500","url":null,"abstract":"Among the different condition monitoring and diagnostic techniques for evaluating mechanical damages in power transformers, Swept Frequency Response Analysis (SFRA) is the most widely used and sensitive tool. Any mechanical fault caused due to short circuit forces or during transportation of transformer causes considerable changes in the equivalent circuit parameters of the winding, which results in detectable changes in the frequency response trace. This trace is then compared with that of a healthy winding for detecting and quantifying the extend of mechanical damage. For interpreting the exact changes for diagnostic purposes, the FRA trace deviation needs to be acknowledged precisely. The winding is modeled as a mutually coupled N section ladder network consisting of inductance and capacitance. These parameters are evaluated initially for a healthy winding and then for axially displaced winding using the Finite Element Method. The changes on the equivalent circuit are then quantified for a wide range of single and multiple axial displacements. The ramification of single and multiple axial displacements on the frequency response signature is also discussed here.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"121 3 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":"125760255","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

Estimation of Moisture Content of Oil-Paper Insulation in Transformers Using Electric Modulus 用电模量估算变压器油纸绝缘含水率

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670527

S. Chowdhury, N. Haque, S. Chatterjee, S. Dalai, B. Chatterjee

{"title":"Estimation of Moisture Content of Oil-Paper Insulation in Transformers Using Electric Modulus","authors":"S. Chowdhury, N. Haque, S. Chatterjee, S. Dalai, B. Chatterjee","doi":"10.1109/catcon52335.2021.9670527","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670527","url":null,"abstract":"In this work, a novel technique has been proposed to estimate the moisture content of oil-paper insulation in transformers employing the concept and idea of electric modulus. Polarization and other relaxation mechanisms of dipoles in any dielectric are directly reflected in the electric modulus. Thus, electric modulus can be regarded as an important parameter to analyze the moisture and ageing condition in dielectrics. Considering the aforesaid fact, electric modulus has been used to estimate the moisture content of oil-paper insulation in transformers with reasonable accuracy. Samples of different moisture contents (1%, 2%, 3% and 4% by weight) were prepared in the laboratory and were subjected to sinusoidal excitation of frequency varying from 0.1 mHz-10 kHz to evaluate the frequency domain spectroscopy (FDS) characteristics of the sample. Using the FDS characteristics, the real and imaginary parts of the complex electric modulus were calculated. Two moisture sensitive characteristic parameters were extracted based on the variation of electric modulus with frequency. Later, it has been shown that using these two parameters the moisture content of the sample can be assessed with reasonable accuracy. This proposed technique can be used to assess the health conditions of oil-paper insulation in real life transformers also.","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":"129753187","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

Diagnosis of Oil Paper Sample Using Capacitance Profile of Time Varying Model 利用时变模型的电容曲线诊断油纸样品

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670512

Ankita Garg, C. Banerjee, A. Baral, S. Chakravorti

引用次数: 0

Multi-stress Aging Studies on Polymeric Surge Arresters for HVDC Transmission 高压直流输电用高分子避雷器的多应力老化研究

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670490

Pranjal Gupta, G. N. Reddy, S. Reddy B.

{"title":"Multi-stress Aging Studies on Polymeric Surge Arresters for HVDC Transmission","authors":"Pranjal Gupta, G. N. Reddy, S. Reddy B.","doi":"10.1109/catcon52335.2021.9670490","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670490","url":null,"abstract":"In recent times, High Voltage DC transmission systems have played an integral role in transmitting a massive amount of electrical energy over very long distances economically. As the transmission system is exposed to the environment, it is prone to lightning surges and atmospheric stresses leading to insulation damage. Metal oxide surge arresters are widely used for protecting the power system from surges. The polymer housing of the arrester has several advantages over ceramic housing. However, it was reported that the polymer housing is affected by environmental factors leading to the failure of the insulation over the period. From the available literature, it was observed that there is no clear understanding of the aging on the polymeric housed surge arrester for the HVDC transmission system. Hence, an experimental investigation was conducted wherein the polymeric housed surge arresters were subjected to the cyclic exposure of the environmental stresses like UV, thermal and humidity similar to the field conditions along with the continuous application of HVDC and the leakage current was continuously recorded at regular time intervals. Visual inspection, hydrophobicity and FTIR (Fourier Transform Infrared) analysis were performed to understand the surface performance of the arresters.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"1 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":"133672724","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

Experiment and Simulation of Leakage Current in HVDC Cable under Different Electro-Thermal Stresses 不同电热应力下高压直流电缆泄漏电流的实验与仿真

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670473

Sathyamoorthy Dhayalan, Bibhav Das, P. Johri, C. Reddy

{"title":"Experiment and Simulation of Leakage Current in HVDC Cable under Different Electro-Thermal Stresses","authors":"Sathyamoorthy Dhayalan, Bibhav Das, P. Johri, C. Reddy","doi":"10.1109/catcon52335.2021.9670473","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670473","url":null,"abstract":"In the recent decades, HVDC XLPE cables have been in use for long distance transmission of power. A good insulator must have very low conductivity, low losses and high thermal stability. It is believed that, impurities, multiple voids, moisture and other contamination in the insulation may lead to increase in leakage current which causes losses in insulation, eventually leading to degradation or failure of insulation. Under high electric and thermal stresses, during transients such as switching, high load and sudden change in loads may lead to a faster rate of degradation of the insulation. So, it’s important to measure insulation leakage current to identify the status of insulation. In this paper, the authors have experimentally measured the leakage current of an actual XLPE cable under different electro-thermal stresses. The leakage current has also been simulated under similar stresses using interdependent distributed electrical and thermal circuit models. The nonlinearly varying DC conductivity of the insulation, characterized experimentally, has been incorporated in the simulation. The multi-factor dependency has been implemented in the circuit simulation. Using simulation model, the leakage current can be estimated for varying electric and thermal fields.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"1 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":"115762242","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

IoT Enabled EMG Monitoring Health System with SASS based Signal Denoising 基于SASS的信号去噪的物联网支持的肌电监测健康系统

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670489

Shubham Singh, Abhishek Kesharwani, Srijan Varma, Sumathi Sumathi

引用次数: 0

Design Optimization of Polymeric Insulators Under Various Environmental Conditions 不同环境条件下聚合物绝缘子的优化设计

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670478

Vaisakh K P, A. R, U. S

引用次数: 3

Simulation of Capacitive Current Compensation in Prebreakdown Current Measurements in Vacuum Under AC Voltages 交流电压下真空预击穿电流测量中的容性电流补偿仿真

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670524

T. Balachandra, S. Kulkarni, S. R.

{"title":"Simulation of Capacitive Current Compensation in Prebreakdown Current Measurements in Vacuum Under AC Voltages","authors":"T. Balachandra, S. Kulkarni, S. R.","doi":"10.1109/catcon52335.2021.9670524","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670524","url":null,"abstract":"This paper presents computer simulation results of prebreakdown (PBD) current growth in a high vacuum environment traditionally used for carrying out basic experimental studies with plain parallel electrodes. In this work, an attempt is made to analyze the PBD measuring circuit only since the elimination of displacement current is an essential prerequisite to measure emission current. The scope of the simulation results presented in this work is limited to the measuring circuit. Using conventional circuit theory, a circuit model is realized, and simulation is carried out using MATLAB SIMULINK. Since the experimental method of measurement under AC excitations involves the gap capacitance current and its compensation using a cancellation technique, an effort is made to run the simulation study for three different percentages of compensation and validate the simulation. The experimental test gap is modeled as a parallel plate capacitor. The effectiveness of the compensation provided by the variable capacitor is checked for two extreme percentages and one mid percentage value.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"41 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":"123382990","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

Comparative Study of Different Control Strategies in Permanent Magnet Synchronous Motor Drives 永磁同步电机驱动中不同控制策略的比较研究

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670516

Vishesh Biyam, Jinesh R, T. A, Sithartha Sourya V S, Pinkymol K. P

{"title":"Comparative Study of Different Control Strategies in Permanent Magnet Synchronous Motor Drives","authors":"Vishesh Biyam, Jinesh R, T. A, Sithartha Sourya V S, Pinkymol K. P","doi":"10.1109/catcon52335.2021.9670516","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670516","url":null,"abstract":"The main goal of this paper is to evaluate and compare various control schemes (scalar control vs vector control) in Permanent Magnet Synchronous Motor (PMSM). Mathematical modelling of PMSM was implemented and used for this paper. Under scalar control, the V/f method is studied. Under vector control, Field Oriented Control (FOC), Direct Torque Control (DTC), Direct Torque Control with Space Vector Modulation (DTC-SVM) are extensively studied. By using MATLAB/Simulink, these control algorithms are implemented in a PMSM motor drive. To that end, MATLAB/Simulink simulations were used to examine and compare the control output of Scalar, FOC, and DTC from various perspectives. Further, it is shown that the shortcomings of the classical DTC control technique are resolved by DTC- SVM control to get a satisfactory control with computational demand as the trade-off. This study compares these control schemes based on the parameters of an existing 2.135-kW surface mounted non-salient sinusoidal flux distribution PMSM to find the noteworthy features associated with each control scheme to understand which control method is to be preferred where and for what desired accuracy.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"6 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":"123684420","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

Investigation on Susceptibility of Transformer Oil in Service to Accelerated Thermal Stress on Generation of Key Gases and Fault Diagnosis 在役变压器油对关键气体产生加速热应力的敏感性研究及故障诊断

2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON) Pub Date : 2021-12-03 DOI: 10.1109/catcon52335.2021.9670496

Prabhat Kumar Maiti

{"title":"Investigation on Susceptibility of Transformer Oil in Service to Accelerated Thermal Stress on Generation of Key Gases and Fault Diagnosis","authors":"Prabhat Kumar Maiti","doi":"10.1109/catcon52335.2021.9670496","DOIUrl":"https://doi.org/10.1109/catcon52335.2021.9670496","url":null,"abstract":"The transformer is a vital constituent of the electricity network. Trouble-free operation of the transformer is very essential to maintaining a reliable and uninterrupted power supply. Several electrical and physicochemical diagnostic methods are in practice for condition monitoring of power transformers to keep them in service. Dissolved Gas Analysis (DGA) is considered as the paramount tool for assessing emerging faults in oil-filled transformers. Numerous established methods like Key Gas, Doernenburg Ratio, Rogers Ratio, Nomograph, IEC Ratio, Duval Triangle, Pentagon etc. are available for analyzing and interpreting the gas content of oil to predict the type of plausible fault. Accurate and interference-free measurement of dissolved hydrocarbon gases is essential for application of these interpretation methods. The chemical behavior of oil differs based on the source, refining process, additives, contamination, service condition, service period, and so on. As a result, it is critical to look at the impact of these changes in oil on the formation of dissolved gases. Samples of almost the same age with varying chemical status are selected for the study. The trends in the formation of dissolved gases in transformers under service for a studied period are presented. The accelerated ageing study at 120°C of oil samples in the laboratory with copper and kraft paper is also conducted for comparison with field data. Despite a substantial variation in gas content among field and laboratory aged samples, no significant effect on the interpretation of the incipient fault is observed.","PeriodicalId":162130,"journal":{"name":"2021 IEEE 5th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON)","volume":"84 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":"115095815","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