Pub Date : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175226
P. Basu, V. Bhadran, R. Gopikakumari
MRT (Mapped Real Transform) is an evolving transform that helps in frequency domain analysis of 2-dimensional signals without any complex operations but in terms of real additions alone. The MRT mapping is highly redundant. A compact unique MRT (UMRT) representation can be derived by eliminating the redundant elements present in the MRT representation. A new approach is presented to compute and place the UMRT coefficients directly from the data, without computing MRT. A new algorithm for computing inverse UMRT is also proposed.
{"title":"A new algorithm to compute forward and inverse 2-D UMRT for N — A power of 2","authors":"P. Basu, V. Bhadran, R. Gopikakumari","doi":"10.1109/EPSCICON.2012.6175226","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175226","url":null,"abstract":"MRT (Mapped Real Transform) is an evolving transform that helps in frequency domain analysis of 2-dimensional signals without any complex operations but in terms of real additions alone. The MRT mapping is highly redundant. A compact unique MRT (UMRT) representation can be derived by eliminating the redundant elements present in the MRT representation. A new approach is presented to compute and place the UMRT coefficients directly from the data, without computing MRT. A new algorithm for computing inverse UMRT is also proposed.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121238934","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175225
J. Thomas, S. Ashok
Absence of a generalized pricing method is one of the key issues with renewable energy generation. Each utility uses a different method for pricing energy. The proposed model gives a generalized method for determining energy price for generating companies, independent power producers, regulatory commissions etc. It incorporates both the economic and performance based factors in the pricing model. Also a penalty for deviation from scheduled energy, a new customer based reliability index and Clean Development Mechanism (CDM) benefit are included in the model. The study explores monthly water inflow and the monthly energy generation of a typical hydel energy generator of 24MW capacity operating in the state of Karnataka, India. The model developed is applied to this generator for determining the electricity price. The co-relation between energy price and technical and economic parameters is explored. A comparison between the electricity price from the proposed model and the levelized cost also is done.
{"title":"A hybrid pricing strategy for distributed generation using small hydel energy","authors":"J. Thomas, S. Ashok","doi":"10.1109/EPSCICON.2012.6175225","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175225","url":null,"abstract":"Absence of a generalized pricing method is one of the key issues with renewable energy generation. Each utility uses a different method for pricing energy. The proposed model gives a generalized method for determining energy price for generating companies, independent power producers, regulatory commissions etc. It incorporates both the economic and performance based factors in the pricing model. Also a penalty for deviation from scheduled energy, a new customer based reliability index and Clean Development Mechanism (CDM) benefit are included in the model. The study explores monthly water inflow and the monthly energy generation of a typical hydel energy generator of 24MW capacity operating in the state of Karnataka, India. The model developed is applied to this generator for determining the electricity price. The co-relation between energy price and technical and economic parameters is explored. A comparison between the electricity price from the proposed model and the levelized cost also is done.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116205632","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175242
M. Thomas, R. Jacob, B. Lethakumary
Time Frequency distributions (TFD) are two-dimensional functions that indicate the time-varying frequency content of one-dimensional signals. The lack of a single distribution that is “best “ for all applications has resulted in a proliferation of TFDs, each corresponding to a different, fixed mapping from signals to the time-frequency plane. A major drawback of all fixed mappings is that, for each mapping, the resulting time frequency representation is satisfactory only for a limited class of signals. This drawback has been overcome by using a signal dependent TFD using a radially Gaussian kernel which has been formulated in Cohen's class as an optimisation problem. In this paper, we compare the different fixed kernel TFDs of Cohen's class-Wigner-Ville, Choi-Williams, Zhao-Atlas-Marks and Born-Jordan distributions with the signal dependent TFD by applying them to multi-component signals.
{"title":"Comparison of WVD based time-frequency distributions","authors":"M. Thomas, R. Jacob, B. Lethakumary","doi":"10.1109/EPSCICON.2012.6175242","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175242","url":null,"abstract":"Time Frequency distributions (TFD) are two-dimensional functions that indicate the time-varying frequency content of one-dimensional signals. The lack of a single distribution that is “best “ for all applications has resulted in a proliferation of TFDs, each corresponding to a different, fixed mapping from signals to the time-frequency plane. A major drawback of all fixed mappings is that, for each mapping, the resulting time frequency representation is satisfactory only for a limited class of signals. This drawback has been overcome by using a signal dependent TFD using a radially Gaussian kernel which has been formulated in Cohen's class as an optimisation problem. In this paper, we compare the different fixed kernel TFDs of Cohen's class-Wigner-Ville, Choi-Williams, Zhao-Atlas-Marks and Born-Jordan distributions with the signal dependent TFD by applying them to multi-component signals.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126239701","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175243
A. Srivastava, D. Duran, M. Pinder, V. Raghav, N. Komerath
Woodburning kitchen stoves provide a potential source of power to bring electric lighting, pollution control and water sterilization to underprivileged communities around the world. The conceptual design of a thermoelectric power generation system is described. A DC fan powered by a rechargeable battery drives air into the stove, optimizing the fuel-air ratio to improve heat release and reduce smoke, soot and other pollutants. A 5-watt light emitting diode floodlamp provides steady lighting so that a child may learn in the kitchen. A milliwatt LED is used to sterilize drinking water. A 13-watt thermoelectric converter module operating at 225 degrees Celsius recharges the battery using the heat from the fire. Fan power is regulated using a feedback control circuit that uses a thermocouple sensor to maximize the heat release in the stove.
{"title":"Conceptual design of a thermoelectric Edu-Kitchen system","authors":"A. Srivastava, D. Duran, M. Pinder, V. Raghav, N. Komerath","doi":"10.1109/EPSCICON.2012.6175243","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175243","url":null,"abstract":"Woodburning kitchen stoves provide a potential source of power to bring electric lighting, pollution control and water sterilization to underprivileged communities around the world. The conceptual design of a thermoelectric power generation system is described. A DC fan powered by a rechargeable battery drives air into the stove, optimizing the fuel-air ratio to improve heat release and reduce smoke, soot and other pollutants. A 5-watt light emitting diode floodlamp provides steady lighting so that a child may learn in the kitchen. A milliwatt LED is used to sterilize drinking water. A 13-watt thermoelectric converter module operating at 225 degrees Celsius recharges the battery using the heat from the fire. Fan power is regulated using a feedback control circuit that uses a thermocouple sensor to maximize the heat release in the stove.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134509621","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175238
A. Ramkumar, S. Durairaj
With increasing the penetration of wind power into electrical grids, DFIG wind turbines are largely developed due to the variable speed feature and hence influencing system dynamics. A detailed mathematical model of DFIG with a closed-loop vector control system is developed. Based on this, objective functions of the transient conditions are implemented and to optimize the controller parameters of both the rotor and grid-side converters. This paper deals the behaviour of interconnected DFIG with hydro-governor synchronous generator with the transient and post-transient operating conditions. During these conditions, the variations of real and reactive power flows of synchronous and asynchronous generators are analysed by PSCAD/EMTDC software.
{"title":"An analysis of transient characteristics of interconnected DFIG with hydro governor synchronous generator","authors":"A. Ramkumar, S. Durairaj","doi":"10.1109/EPSCICON.2012.6175238","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175238","url":null,"abstract":"With increasing the penetration of wind power into electrical grids, DFIG wind turbines are largely developed due to the variable speed feature and hence influencing system dynamics. A detailed mathematical model of DFIG with a closed-loop vector control system is developed. Based on this, objective functions of the transient conditions are implemented and to optimize the controller parameters of both the rotor and grid-side converters. This paper deals the behaviour of interconnected DFIG with hydro-governor synchronous generator with the transient and post-transient operating conditions. During these conditions, the variations of real and reactive power flows of synchronous and asynchronous generators are analysed by PSCAD/EMTDC software.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128892218","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175247
A. Nachiappan, K. Sundararajan, V. Malarselvam
Current-controlled pulse width modulated (PWM) voltage source inverters are most widely used in high performance AC drive systems, as they provide high dynamic response. A comparative study between the Hysteresis controller and Proportional-Integral controller using PWM techniques for three-phase voltage source inverter was done. The comparison was done in terms of total harmonic distortion (THD) level at the three phase load current. Simulation was done with the help of Matlab-Simulink environment. The hysteresis controller provides gooddynamic performance, whereas the Proportional-Integral controller provides instantaneous current control and waveshaping, fixed inverter switching frequency resulting in better harmonics.
{"title":"Current controlled voltage source inverter using Hysteresis controller and PI controller","authors":"A. Nachiappan, K. Sundararajan, V. Malarselvam","doi":"10.1109/EPSCICON.2012.6175247","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175247","url":null,"abstract":"Current-controlled pulse width modulated (PWM) voltage source inverters are most widely used in high performance AC drive systems, as they provide high dynamic response. A comparative study between the Hysteresis controller and Proportional-Integral controller using PWM techniques for three-phase voltage source inverter was done. The comparison was done in terms of total harmonic distortion (THD) level at the three phase load current. Simulation was done with the help of Matlab-Simulink environment. The hysteresis controller provides gooddynamic performance, whereas the Proportional-Integral controller provides instantaneous current control and waveshaping, fixed inverter switching frequency resulting in better harmonics.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132408557","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175265
G. George, R. Rakesh, M. Kowsalya
This paper deals with the study and analysis of Flexible AC Transmission Systems (FACTS), mainly the modeling of STATCOM. Reactive Power Compensation plays a very important role in the transmission of Electric Power. A comparative study of how the reactive power is injected into the transmission system with and without STATCOM under different loading condition is also illustrated in this paper. Simulations are performed using MATLAB/SIMULINK software.
{"title":"Modeling of STATCOM under different loading conditions","authors":"G. George, R. Rakesh, M. Kowsalya","doi":"10.1109/EPSCICON.2012.6175265","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175265","url":null,"abstract":"This paper deals with the study and analysis of Flexible AC Transmission Systems (FACTS), mainly the modeling of STATCOM. Reactive Power Compensation plays a very important role in the transmission of Electric Power. A comparative study of how the reactive power is injected into the transmission system with and without STATCOM under different loading condition is also illustrated in this paper. Simulations are performed using MATLAB/SIMULINK software.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121633406","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175249
Mr. A. P. deshpande, Dr. B. N. Chaudhari, Dr. V. N. Pande
This paper presents the analysis, design and simulation of a back to back converter for a modern wind energy system. In the initial stage, the study of DFIG (Doubly Fed Induction Generator) is carried out in order to have a broader understanding of the functions of the back to back converter. Then the design of back to back converter and choice of components is elaborated. The control strategy for the back to back converter is described with equations and the snapshot of the theoretical scheme and scheme implemented in the real life situation are both shown. The control strategy for the grid-side and rotor-side converter is thoroughly elaborated. The implementation of control strategy is done with the help of dSPACE. Being a very new technology in present academic scenario, introduction regarding dSPACE has been made. The dSPACE even though offering some facilities, has some limitations. Hence, the implementation of the present scheme with dSPACE while keeping an eye on the limitation is explained. The necessary adaptation made while using the control strategy are also focused. Finally, pulses obtained from dSPACE for Grid Side Converter (GSC) and Rotor Side Converter (RSC) are shown.
{"title":"Design and simulation of back-to-back converter for modern wind energy generation system using dSPACE","authors":"Mr. A. P. deshpande, Dr. B. N. Chaudhari, Dr. V. N. Pande","doi":"10.1109/EPSCICON.2012.6175249","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175249","url":null,"abstract":"This paper presents the analysis, design and simulation of a back to back converter for a modern wind energy system. In the initial stage, the study of DFIG (Doubly Fed Induction Generator) is carried out in order to have a broader understanding of the functions of the back to back converter. Then the design of back to back converter and choice of components is elaborated. The control strategy for the back to back converter is described with equations and the snapshot of the theoretical scheme and scheme implemented in the real life situation are both shown. The control strategy for the grid-side and rotor-side converter is thoroughly elaborated. The implementation of control strategy is done with the help of dSPACE. Being a very new technology in present academic scenario, introduction regarding dSPACE has been made. The dSPACE even though offering some facilities, has some limitations. Hence, the implementation of the present scheme with dSPACE while keeping an eye on the limitation is explained. The necessary adaptation made while using the control strategy are also focused. Finally, pulses obtained from dSPACE for Grid Side Converter (GSC) and Rotor Side Converter (RSC) are shown.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122293189","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175244
A. Kumar, C. Sekhar
In this paper, congestion management (CM) based on demand management has been proposed for a mix of pool and bilateral electricity market. The bilateral demand considered is secure after obtaining minimum deviations in preferred schedules obtained by the ISO. The impact of Generalized Power Flow Controller (GUPFC) has been studied for congestion management. The proposed approach has been tested on IEEE 24 bus test system.
{"title":"Congestion management based on demand management and impact of GUPFC","authors":"A. Kumar, C. Sekhar","doi":"10.1109/EPSCICON.2012.6175244","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175244","url":null,"abstract":"In this paper, congestion management (CM) based on demand management has been proposed for a mix of pool and bilateral electricity market. The bilateral demand considered is secure after obtaining minimum deviations in preferred schedules obtained by the ISO. The impact of Generalized Power Flow Controller (GUPFC) has been studied for congestion management. The proposed approach has been tested on IEEE 24 bus test system.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116638361","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 : 2012-04-03DOI: 10.1109/EPSCICON.2012.6175283
B. Paul, K. T. Shanavaz, P. Mythili
In this paper an attempt has been made to determine the number of Premature Ventricular Contraction (PVC) cycles accurately from a given Electrocardiogram (ECG) using a wavelet constructed from multiple Gaussian functions. It is difficult to assess the ECGs of patients who are continuously monitored over a long period of time. Hence the proposed method of classification will be helpful to doctors to determine the severity of PVC in a patient. Principal Component Analysis (PCA) and a simple classifier have been used in addition to the specially developed wavelet transform. The proposed wavelet has been designed using multiple Gaussian functions which when summed up looks similar to that of a normal ECG. The number of Gaussians used depends on the number of peaks present in a normal ECG. The developed wavelet satisfied all the properties of a traditional continuous wavelet. The new wavelet was optimized using genetic algorithm (GA). ECG records from Massachusetts Institute of Technology-Beth Israel Hospital (MIT-BIH) database have been used for validation. Out of the 8694 ECG cycles used for evaluation, the classification algorithm responded with an accuracy of 97.77%. In order to compare the performance of the new wavelet, classification was also performed using the standard wavelets like morlet, meyer, bior3.9, db5, db3, sym3 and haar. The new wavelet outperforms the rest.
{"title":"Towards the development of a new wavelet for ECG classification","authors":"B. Paul, K. T. Shanavaz, P. Mythili","doi":"10.1109/EPSCICON.2012.6175283","DOIUrl":"https://doi.org/10.1109/EPSCICON.2012.6175283","url":null,"abstract":"In this paper an attempt has been made to determine the number of Premature Ventricular Contraction (PVC) cycles accurately from a given Electrocardiogram (ECG) using a wavelet constructed from multiple Gaussian functions. It is difficult to assess the ECGs of patients who are continuously monitored over a long period of time. Hence the proposed method of classification will be helpful to doctors to determine the severity of PVC in a patient. Principal Component Analysis (PCA) and a simple classifier have been used in addition to the specially developed wavelet transform. The proposed wavelet has been designed using multiple Gaussian functions which when summed up looks similar to that of a normal ECG. The number of Gaussians used depends on the number of peaks present in a normal ECG. The developed wavelet satisfied all the properties of a traditional continuous wavelet. The new wavelet was optimized using genetic algorithm (GA). ECG records from Massachusetts Institute of Technology-Beth Israel Hospital (MIT-BIH) database have been used for validation. Out of the 8694 ECG cycles used for evaluation, the classification algorithm responded with an accuracy of 97.77%. In order to compare the performance of the new wavelet, classification was also performed using the standard wavelets like morlet, meyer, bior3.9, db5, db3, sym3 and haar. The new wavelet outperforms the rest.","PeriodicalId":143947,"journal":{"name":"2012 International Conference on Power, Signals, Controls and Computation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113934806","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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