Pub Date : 2010-12-01DOI: 10.1109/INDCON.2010.5712640
G. Koperundevi, M. Goyal, Sunil C. Das, N. K. Roy, R. Sarathi
One of the major causes of failure of converter transformer is the incipient discharges caused due to deterioration of insulation. The insulation in the converter transformers is stressed not only by AC voltages but also with remnant DC voltages. The Acoustic Emission (AE) Technique can identify such incipient discharges in the converter transformer. In the present work, experimental studies were carried out by simulating various incipient discharges such as corona discharge, partial discharge (PD) and surface discharge in an insulation test cell under AC and DC voltages by using AE Technique. The bandwidth of the AE sensor used in the present study is of wide band type and the bandwidth lies in the range of 100 kHz-1 MHz. It is observed that AE signals produced due to different incipient discharges are having different dominant frequency range, amplitude, rise time, number of pulses and energy. To classify the discharges an innovative methodology is adopted by constructing the ternary plot from the FFT output of AE signal generated by the incipient discharges.
{"title":"Classification of incipient discharges in transformer insulation using Acoustic Emission signatures","authors":"G. Koperundevi, M. Goyal, Sunil C. Das, N. K. Roy, R. Sarathi","doi":"10.1109/INDCON.2010.5712640","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712640","url":null,"abstract":"One of the major causes of failure of converter transformer is the incipient discharges caused due to deterioration of insulation. The insulation in the converter transformers is stressed not only by AC voltages but also with remnant DC voltages. The Acoustic Emission (AE) Technique can identify such incipient discharges in the converter transformer. In the present work, experimental studies were carried out by simulating various incipient discharges such as corona discharge, partial discharge (PD) and surface discharge in an insulation test cell under AC and DC voltages by using AE Technique. The bandwidth of the AE sensor used in the present study is of wide band type and the bandwidth lies in the range of 100 kHz-1 MHz. It is observed that AE signals produced due to different incipient discharges are having different dominant frequency range, amplitude, rise time, number of pulses and energy. To classify the discharges an innovative methodology is adopted by constructing the ternary plot from the FFT output of AE signal generated by the incipient discharges.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134321423","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712712
S. Pable, A. Imran, M. Hasan
Subthreshold circuits are an ideal choice for ultra low power, moderate throughput applications. In subthreshold region to meet the ultra-low power requirement of energy constrained devices, supply voltage less than the threshold voltage is applied. At same frequency, subthreshold circuits show orders of magnitude power saving over superthreshold circuits. In subthreshold operating region, minute leakage current is use as switching current but this limit the performance of logic gate. Primary goal while designing the subthreshold circuit is to increase the speed. Carbon Nano Tube Field Effect Transistors (CNFETs) is one of the most promising devices among emerging technologies. Most of the fundamental limitations of traditional MOSFETs are overcome in CNFETs. This paper investigates the performance analysis of subthreshold circuits and shown improvement in speed of logic gates using CNFETs. This paper primarily investigates the characteristics of CNFETs in subthreshold region. Improvement in performance of FO4, 1-bit full adder and 2:1 multiplexer is observed using CNFET over Si-MOSFET in subthreshold. This paper propose that reducing the gate oxide thickness of CNFET increases drive current and hence speeds with almost same amount of power dissipation.
{"title":"Performance optimization of CNFET based subthreshold circuits","authors":"S. Pable, A. Imran, M. Hasan","doi":"10.1109/INDCON.2010.5712712","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712712","url":null,"abstract":"Subthreshold circuits are an ideal choice for ultra low power, moderate throughput applications. In subthreshold region to meet the ultra-low power requirement of energy constrained devices, supply voltage less than the threshold voltage is applied. At same frequency, subthreshold circuits show orders of magnitude power saving over superthreshold circuits. In subthreshold operating region, minute leakage current is use as switching current but this limit the performance of logic gate. Primary goal while designing the subthreshold circuit is to increase the speed. Carbon Nano Tube Field Effect Transistors (CNFETs) is one of the most promising devices among emerging technologies. Most of the fundamental limitations of traditional MOSFETs are overcome in CNFETs. This paper investigates the performance analysis of subthreshold circuits and shown improvement in speed of logic gates using CNFETs. This paper primarily investigates the characteristics of CNFETs in subthreshold region. Improvement in performance of FO4, 1-bit full adder and 2:1 multiplexer is observed using CNFET over Si-MOSFET in subthreshold. This paper propose that reducing the gate oxide thickness of CNFET increases drive current and hence speeds with almost same amount of power dissipation.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116907371","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712690
N. Gupta, S. P. Dubey, S. Singh
In this paper, a novel control algorithm for three-phase four-wire shunt active power filter is proposed without measuring load and filter current with different load condition is proposed. The control theory and reference source current signal generation is based on Instantaneous Reactive Power theory. The idea is different from the conventional control approach based on sensing load and/or compensator current, hence reduces the number of current sensors. The net fundamental power is calculated by using control architecture which should be flow from source to load. The source currents are exactly in-phase with supply voltages and having sinusoidal nature after providing the compensation by the compensator. The proposed control technique has been simulated using MATLAB/Simulink and tested on TMS320F28335 floating point digital signal processor using processor-in-loop (PIL) process. The results demonstrate the viability of the proposed control scheme as per IEEE 519–1992 recommended harmonic standard limits.
{"title":"DSP based control algorithm for three-phase four-wire shunt active filter without load and filter current measurement","authors":"N. Gupta, S. P. Dubey, S. Singh","doi":"10.1109/INDCON.2010.5712690","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712690","url":null,"abstract":"In this paper, a novel control algorithm for three-phase four-wire shunt active power filter is proposed without measuring load and filter current with different load condition is proposed. The control theory and reference source current signal generation is based on Instantaneous Reactive Power theory. The idea is different from the conventional control approach based on sensing load and/or compensator current, hence reduces the number of current sensors. The net fundamental power is calculated by using control architecture which should be flow from source to load. The source currents are exactly in-phase with supply voltages and having sinusoidal nature after providing the compensation by the compensator. The proposed control technique has been simulated using MATLAB/Simulink and tested on TMS320F28335 floating point digital signal processor using processor-in-loop (PIL) process. The results demonstrate the viability of the proposed control scheme as per IEEE 519–1992 recommended harmonic standard limits.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115312682","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712655
J. Therattil, P. C. Panda
The design of a self tuning Static Var Compensator (SVC) based on pole placement method is presented. In order to maintain good damping characteristics when there is a drastic change in system operating condition, the gain settings are adapted in real time based on the continuously measured system inputs and outputs. The new self tuning proportional integral derivative (PID) control can provide better damping characteristics than a fixed gain PID control SVC over a wide range of operating conditions. Digital simulation of a two machine system following a three phase fault under different loading conditions is performed to demonstrate the robustness and effectiveness of the developed controller. Simulation results are presented at the end of the paper.
{"title":"Dynamic stability enhancement using self-tuning Static Var Compensator","authors":"J. Therattil, P. C. Panda","doi":"10.1109/INDCON.2010.5712655","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712655","url":null,"abstract":"The design of a self tuning Static Var Compensator (SVC) based on pole placement method is presented. In order to maintain good damping characteristics when there is a drastic change in system operating condition, the gain settings are adapted in real time based on the continuously measured system inputs and outputs. The new self tuning proportional integral derivative (PID) control can provide better damping characteristics than a fixed gain PID control SVC over a wide range of operating conditions. Digital simulation of a two machine system following a three phase fault under different loading conditions is performed to demonstrate the robustness and effectiveness of the developed controller. Simulation results are presented at the end of the paper.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115541629","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712688
N. Purohit, A. Verma, H. Agrawal
In this work, ray based simulation approach has been used for estimating the performance of WSN with MIMO and SISO techniques. The ray based simulation should produce more accurate results than model based simulation approach because it is more close to real life environment. In addition to simulation, Markov model based analytical approach has also been adopted. The transition probabilities among various states of the Markov model has been evaluated using the data produced by the ray trace simulator. It is also giving better performance as compared to Rayleigh fading channel based Markov models approach. LEACH clustering protocol has been used with a slight modification in terms of selecting secondary cluster head. Alamouti space-time code has been used with V-MIMO and significant improvement in the overall life time has been observed as compared to SISO WSN.
{"title":"Performance analysis of wireless sensor network with virtual MIMO","authors":"N. Purohit, A. Verma, H. Agrawal","doi":"10.1109/INDCON.2010.5712688","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712688","url":null,"abstract":"In this work, ray based simulation approach has been used for estimating the performance of WSN with MIMO and SISO techniques. The ray based simulation should produce more accurate results than model based simulation approach because it is more close to real life environment. In addition to simulation, Markov model based analytical approach has also been adopted. The transition probabilities among various states of the Markov model has been evaluated using the data produced by the ray trace simulator. It is also giving better performance as compared to Rayleigh fading channel based Markov models approach. LEACH clustering protocol has been used with a slight modification in terms of selecting secondary cluster head. Alamouti space-time code has been used with V-MIMO and significant improvement in the overall life time has been observed as compared to SISO WSN.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"275 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123722636","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712615
Ashwani Kumar, Punit Kumar
In this paper, the impact on nodal price determination of real and reactive power considering different reactive power price cost calculation methods for generator reactive power has been presented. The impact of FACTS controllers has also been considered taking their cost function into account. The comparison of fuel costs, reactive power cost, and cost of FACTS devices, and their impact on nodal price determination has been presented for different cases of reactive power cost models. The effectiveness of the proposed approach has been tested on IEEE 24-bus Reliability Test System (RTS).
{"title":"Impact on nodal pricing with different generators' reactive power cost models in pool based electricity markets","authors":"Ashwani Kumar, Punit Kumar","doi":"10.1109/INDCON.2010.5712615","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712615","url":null,"abstract":"In this paper, the impact on nodal price determination of real and reactive power considering different reactive power price cost calculation methods for generator reactive power has been presented. The impact of FACTS controllers has also been considered taking their cost function into account. The comparison of fuel costs, reactive power cost, and cost of FACTS devices, and their impact on nodal price determination has been presented for different cases of reactive power cost models. The effectiveness of the proposed approach has been tested on IEEE 24-bus Reliability Test System (RTS).","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123844529","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712644
H. Katiyar, R. Jana, R. Bhattacharjee
Cooperative relaying was introduced to make use of the broadcast nature of the wireless channel, which provides spatial diversity to combat multi-path fading. Multiple antennas can be installed on infrastructure based fixed relays, which improve the system performance. Relay can process the signal received through multiple antennas with the help of maximum ratio combining (MRC) or selection combining (SC). MRC is an optimal combiner which fully exploits the spatial diversity at cost of higher complexity. SC is less complex, at the same time it cannot fully exploit the spatial diversity. Generalized selection combining (GSC) bridges the gap between these two schemes (MRC and SC), which adaptively combines the received signals from multiple antennas. In this paper, we investigate the performance of multi-antenna relay with GSC. The effect of relay placement in various path-loss condition is also studied.
{"title":"Performance analysis of two-hop regenerative relay network with generalized selection combining at multi-antenna relay","authors":"H. Katiyar, R. Jana, R. Bhattacharjee","doi":"10.1109/INDCON.2010.5712644","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712644","url":null,"abstract":"Cooperative relaying was introduced to make use of the broadcast nature of the wireless channel, which provides spatial diversity to combat multi-path fading. Multiple antennas can be installed on infrastructure based fixed relays, which improve the system performance. Relay can process the signal received through multiple antennas with the help of maximum ratio combining (MRC) or selection combining (SC). MRC is an optimal combiner which fully exploits the spatial diversity at cost of higher complexity. SC is less complex, at the same time it cannot fully exploit the spatial diversity. Generalized selection combining (GSC) bridges the gap between these two schemes (MRC and SC), which adaptively combines the received signals from multiple antennas. In this paper, we investigate the performance of multi-antenna relay with GSC. The effect of relay placement in various path-loss condition is also studied.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130049159","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712735
Siddheswar Sen, U. Datta
This paper presents the mathematical model of a variable frequency variable voltage sinusoidal pulse width modulated (SPWM) signal and implementation of the same on microcontroller based embedded system. The mathematical model is based on the step function. The implementation of the mathematical model on P89LPC9221 microcontroller based embedded system is described. The analysis is validated by simulation and experiment results.
{"title":"Mathematical modelling of sinusoidal pulse width modulated signal and its implementation on microcontroller based embedded system","authors":"Siddheswar Sen, U. Datta","doi":"10.1109/INDCON.2010.5712735","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712735","url":null,"abstract":"This paper presents the mathematical model of a variable frequency variable voltage sinusoidal pulse width modulated (SPWM) signal and implementation of the same on microcontroller based embedded system. The mathematical model is based on the step function. The implementation of the mathematical model on P89LPC9221 microcontroller based embedded system is described. The analysis is validated by simulation and experiment results.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124365491","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712710
S. Sankaralingam, S. Dhar, Samik Chakraborty, B. Gupta
The concept of being connected anywhere and everywhere is the main driving force for developing and researching the potential Wireless Body Area Networks operated in WLAN and HiperLAN bands. This paper presents design, development and evaluation of a fully fabric annular ring microstrip antenna suitable for wearable applications in WLAN band. Both simulated and experimental results on the performance characteristics of this antenna are presented.
{"title":"Annular ring microstrip antenna for body-worn applications","authors":"S. Sankaralingam, S. Dhar, Samik Chakraborty, B. Gupta","doi":"10.1109/INDCON.2010.5712710","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712710","url":null,"abstract":"The concept of being connected anywhere and everywhere is the main driving force for developing and researching the potential Wireless Body Area Networks operated in WLAN and HiperLAN bands. This paper presents design, development and evaluation of a fully fabric annular ring microstrip antenna suitable for wearable applications in WLAN band. Both simulated and experimental results on the performance characteristics of this antenna are presented.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125793041","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 : 2010-12-01DOI: 10.1109/INDCON.2010.5712649
J. Bhattacharya, S. Majumder, G. Sanyal
The detection of fine feature from an image is often challenging. Generally, the smoothing filters used for the purpose are inadequate for such applications with the exception of bilateral and mean shift filter. A new smoothing filter termed Gaussian Maxima Filter(GMF), developed and presented here shows better performance in preserving fine features even for relatively large window size. This paper also presents necessary analysis along with experimental results obtained from GMF.
{"title":"The Gaussian Maxima Filter (GMF): A new approach for scale-space smoothing of an image","authors":"J. Bhattacharya, S. Majumder, G. Sanyal","doi":"10.1109/INDCON.2010.5712649","DOIUrl":"https://doi.org/10.1109/INDCON.2010.5712649","url":null,"abstract":"The detection of fine feature from an image is often challenging. Generally, the smoothing filters used for the purpose are inadequate for such applications with the exception of bilateral and mean shift filter. A new smoothing filter termed Gaussian Maxima Filter(GMF), developed and presented here shows better performance in preserving fine features even for relatively large window size. This paper also presents necessary analysis along with experimental results obtained from GMF.","PeriodicalId":109071,"journal":{"name":"2010 Annual IEEE India Conference (INDICON)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122737429","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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