Pub Date : 2011-12-01DOI: 10.1109/ICEAS.2011.6147169
P. Biswas, S. Jhajharia, S. Bhattacharya, A. Khanuja, A. Warthi, R. Tiwari, J. Mathur
This paper presents an analytical approach to calculate the spacing between the two parallel strings or rows of non-tracked solar Photovoltaics (PV) modules. Shadows of the front row modules fall on the modules of the next row. Optimum distance between the rows has been found for eight different cities of India through the calculations of sun path and length of shadow cast by modules. The shadow length was also calculated throughout the year for every location using MATLAB coding to find the effect of change in gap between consecutive rows on the effective sunshine hours for power generation. It has been found that due to considerably less irradiation incident on the modules during sunset and sunrise, keeping large row gap provides very little gain in energy output while leaving less space to accommodate more modules in the given space. This paper presents analysis of such trade-off between space utilization and solar radiation captured by PV modules.
{"title":"An analytical approach to calculate the spacing between two parallel rows of non-tracked south oriented solar PV modules setup in India","authors":"P. Biswas, S. Jhajharia, S. Bhattacharya, A. Khanuja, A. Warthi, R. Tiwari, J. Mathur","doi":"10.1109/ICEAS.2011.6147169","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147169","url":null,"abstract":"This paper presents an analytical approach to calculate the spacing between the two parallel strings or rows of non-tracked solar Photovoltaics (PV) modules. Shadows of the front row modules fall on the modules of the next row. Optimum distance between the rows has been found for eight different cities of India through the calculations of sun path and length of shadow cast by modules. The shadow length was also calculated throughout the year for every location using MATLAB coding to find the effect of change in gap between consecutive rows on the effective sunshine hours for power generation. It has been found that due to considerably less irradiation incident on the modules during sunset and sunrise, keeping large row gap provides very little gain in energy output while leaving less space to accommodate more modules in the given space. This paper presents analysis of such trade-off between space utilization and solar radiation captured by PV modules.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132762225","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147185
Renu Sharma, N. Nayak, K. R. Krishnanand, P. Rout
Dynamic economic dispatch (DED) is one of the main functions of power system operation and control. It determines the optimal operation of units with predicted load demands over a certain period of time with an objective to minimize total production cost while the system is operating within its ramp rate limits. This paper presents DED based on Invasive Weed Optimization (IWO) technique for the determination of the global or near global optimum dispatch solution. In the present case, load balance constraints, operating limits, valve-point loading, ramp constraints, and network losses using loss coefficients are incorporated. Numerical results for a sample test system (10-unit) have been presented to demonstrate the performance and applicability of the proposed method.
{"title":"Modified invasive weed optimization with dual mutation technique for dynamic economic dispatch","authors":"Renu Sharma, N. Nayak, K. R. Krishnanand, P. Rout","doi":"10.1109/ICEAS.2011.6147185","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147185","url":null,"abstract":"Dynamic economic dispatch (DED) is one of the main functions of power system operation and control. It determines the optimal operation of units with predicted load demands over a certain period of time with an objective to minimize total production cost while the system is operating within its ramp rate limits. This paper presents DED based on Invasive Weed Optimization (IWO) technique for the determination of the global or near global optimum dispatch solution. In the present case, load balance constraints, operating limits, valve-point loading, ramp constraints, and network losses using loss coefficients are incorporated. Numerical results for a sample test system (10-unit) have been presented to demonstrate the performance and applicability of the proposed method.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133291902","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147094
B. Majhi, J. Satpathy, M. Rout
The paper develops an efficient but simple adaptive nonlinear classifier for recognition of handwritten Odiya numerals. The standard gradient and curvature features are extracted and nonlinearly mapped by sine/cosine expansions. These nonlinear inputs are fed to a low complexity classifier. The simulation results show excellent classification accuracy when test features are used.
{"title":"Efficient recognition of Odiya numerals using low complexity neural classifier","authors":"B. Majhi, J. Satpathy, M. Rout","doi":"10.1109/ICEAS.2011.6147094","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147094","url":null,"abstract":"The paper develops an efficient but simple adaptive nonlinear classifier for recognition of handwritten Odiya numerals. The standard gradient and curvature features are extracted and nonlinearly mapped by sine/cosine expansions. These nonlinear inputs are fed to a low complexity classifier. The simulation results show excellent classification accuracy when test features are used.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121902027","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147198
A. Mishra, Abhishek
In this paper we present a cerebral cortex inspired architecture for robots. This is an attempt at achieving cognitive behavior in robotics. This novel approach maps cerebral cortex architecture of human beings to processing architecture of robots. We have tried to provide a new direction to the pursuit of bringing autonomous machines into real-life settings, by using Human Brain Cognitive Architecture in robots. This novel approach maps the brain architecture of human beings to the brain architecture of robots. To support our work we have developed Cognitive Insect Robot inspired by Brain Architecture (CIRBA), a platform on which we have successfully incorporated the Cognitive Structure and tested some basic behavioral actions performed by living beings. We have used the concept of perception-action cycle and human hierarchical cortical representation in CIRBA.
{"title":"Cerebral cortex inspired cognitive architecture for robots","authors":"A. Mishra, Abhishek","doi":"10.1109/ICEAS.2011.6147198","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147198","url":null,"abstract":"In this paper we present a cerebral cortex inspired architecture for robots. This is an attempt at achieving cognitive behavior in robotics. This novel approach maps cerebral cortex architecture of human beings to processing architecture of robots. We have tried to provide a new direction to the pursuit of bringing autonomous machines into real-life settings, by using Human Brain Cognitive Architecture in robots. This novel approach maps the brain architecture of human beings to the brain architecture of robots. To support our work we have developed Cognitive Insect Robot inspired by Brain Architecture (CIRBA), a platform on which we have successfully incorporated the Cognitive Structure and tested some basic behavioral actions performed by living beings. We have used the concept of perception-action cycle and human hierarchical cortical representation in CIRBA.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125975426","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147102
R. Behera, Shyama P Das
In this paper, a three-level inverter fed induction motor drive operating under Direct Torque Control (DTC) is presented. DTC do not show good performance in low speed region due to stator flux demagnetization that relates to variation in stator resistance. Here, a sinusoidal wave is used as dither signal of minute amplitude (for torque hysteresis band and flux hysteresis band respectively) in the error block. Hence, this method is used to take care of the demagnetizing effect of flux vector near sector boundary. In this paper, sinusoidal dithering technique is applied to study the effect of settling time, flux demagnetizing effect, dc drift and initial value problem, flux and current ripple reduction. A laboratory prototype of the drive system has been developed and the simulation and experimental results are reported.
{"title":"High performance induction motor drive: A dither injection technique","authors":"R. Behera, Shyama P Das","doi":"10.1109/ICEAS.2011.6147102","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147102","url":null,"abstract":"In this paper, a three-level inverter fed induction motor drive operating under Direct Torque Control (DTC) is presented. DTC do not show good performance in low speed region due to stator flux demagnetization that relates to variation in stator resistance. Here, a sinusoidal wave is used as dither signal of minute amplitude (for torque hysteresis band and flux hysteresis band respectively) in the error block. Hence, this method is used to take care of the demagnetizing effect of flux vector near sector boundary. In this paper, sinusoidal dithering technique is applied to study the effect of settling time, flux demagnetizing effect, dc drift and initial value problem, flux and current ripple reduction. A laboratory prototype of the drive system has been developed and the simulation and experimental results are reported.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122276863","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147184
S. Sarangi, A. Pradhan
Transmission lines protected by distance relays find limitations in the presence of series compensation. The impedance seen by the distance relay is modulated when the fault loop includes the series capacitor. The level of compensation at any instant depends on the number of capacitors connected at that time and at times the bank of capacitors may be bypassed leading to uncompensated line situation. Therefore for correct operation of the distance relay the information on the level of compensation present in the transmission line is essential. In the proposed work the PMU data of both the ends of the line are applied to calculate the level of compensation by which accurate adaptive zone-2 setting of the relay is achieved. The proposed method is tested for a 400/kV system simulated in EMTDC/PSCAD and the results show the high accuracy of the proposed method.
{"title":"Apply PMU data for Zone-2 setting of series compensated line","authors":"S. Sarangi, A. Pradhan","doi":"10.1109/ICEAS.2011.6147184","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147184","url":null,"abstract":"Transmission lines protected by distance relays find limitations in the presence of series compensation. The impedance seen by the distance relay is modulated when the fault loop includes the series capacitor. The level of compensation at any instant depends on the number of capacitors connected at that time and at times the bank of capacitors may be bypassed leading to uncompensated line situation. Therefore for correct operation of the distance relay the information on the level of compensation present in the transmission line is essential. In the proposed work the PMU data of both the ends of the line are applied to calculate the level of compensation by which accurate adaptive zone-2 setting of the relay is achieved. The proposed method is tested for a 400/kV system simulated in EMTDC/PSCAD and the results show the high accuracy of the proposed method.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125118533","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147101
S. Jena, B. Babu, A. Naik, G. Mishra
Now a day's distributed generation (DG) system uses current regulated PWM voltage-source inverters (VSI) for synchronizing the utility grid with DG source in order to meet the following objectives: 1) To ensure grid stability 2) active and reactive power control through voltage and frequency control 3) power quality improvement (i.e. harmonic elimination) etc. In this paper the comparative study between hysteresis and proportional integral (PI) with hysteresis current controller is presented for 1-Φ grid connected inverter system. The main advantage of hysteresis+PI current controller is low total harmonic distortion (THD) at the point of common coupling (PCC) at a higher band width of the hysteresis band. The studied system is modeled and simulated in the MATLAB Simulink environment.
{"title":"Performance improvement of single-phase grid — Connected PWM inverter using PI with hysteresis current controller","authors":"S. Jena, B. Babu, A. Naik, G. Mishra","doi":"10.1109/ICEAS.2011.6147101","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147101","url":null,"abstract":"Now a day's distributed generation (DG) system uses current regulated PWM voltage-source inverters (VSI) for synchronizing the utility grid with DG source in order to meet the following objectives: 1) To ensure grid stability 2) active and reactive power control through voltage and frequency control 3) power quality improvement (i.e. harmonic elimination) etc. In this paper the comparative study between hysteresis and proportional integral (PI) with hysteresis current controller is presented for 1-Φ grid connected inverter system. The main advantage of hysteresis+PI current controller is low total harmonic distortion (THD) at the point of common coupling (PCC) at a higher band width of the hysteresis band. The studied system is modeled and simulated in the MATLAB Simulink environment.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125935794","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147207
A. Brazhnikov, I. R. Belozerov
The main advantage of multiphase frequency controlled AC drives is that they have more control resources than the 3-phase ones. The increase of the inverter system phase number (i.e. the number of the phases) more than five together with the joint application of the over-phase control method and the classical principle of AC motor frequency control in these systems allow to improve considerably a number of the drive technical-and-economic characteristics (speed of response, reliability, manufacturing cost, etc.).
{"title":"Non-traditional control and advantages of multiphase AC inverter drives","authors":"A. Brazhnikov, I. R. Belozerov","doi":"10.1109/ICEAS.2011.6147207","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147207","url":null,"abstract":"The main advantage of multiphase frequency controlled AC drives is that they have more control resources than the 3-phase ones. The increase of the inverter system phase number (i.e. the number of the phases) more than five together with the joint application of the over-phase control method and the classical principle of AC motor frequency control in these systems allow to improve considerably a number of the drive technical-and-economic characteristics (speed of response, reliability, manufacturing cost, etc.).","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127773387","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147210
A. Hozouri, A. Sharaf
As power electric system becomes complex and severely congested the power delivery challenge becomes increasingly complex. With the limited expansion in the transmission system, utilities are always facing the challenge of improving system security and reliability without a significant investment in new infra structure. The modern power system comes with a new generation of nonlinear loads which extensively use power electronic converters. These new nonlinear elements with their inherent nonlinearity characteristics pose new and additional challenge to electric utility systems. On the other hand intermittent loads and their temporal affects on the power quality have always been a continuous challenge. Inrush currents during induction motor start-stop are always a concern and they affect the system stability. Dynamic voltage fluctuation is always associated with induction motor starting. Flexible AC Transmission has been widely used to enhance power transmission capability and also improve the system dynamic stability. In this paper a Novel Modulated Power Filter Compensation (MPFC) Scheme developed by second author has been validated. This new device with a novel quad-loop control strategy has been tested and validated under severe fault condition and load excursions to validate the effectiveness of the MPFC device in a Single Machine Infinite Bus system (SMIB) AC system in the presence of large induction motor loads and DC Arc type nonlinear load. MATLAB-SIMULINK Software was used for digital simulation purpose to validate the effectiveness of this device in improving the power quality and system stability.
{"title":"A FACT based voltage stabilization and harmonic reduction scheme for a SMIB system","authors":"A. Hozouri, A. Sharaf","doi":"10.1109/ICEAS.2011.6147210","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147210","url":null,"abstract":"As power electric system becomes complex and severely congested the power delivery challenge becomes increasingly complex. With the limited expansion in the transmission system, utilities are always facing the challenge of improving system security and reliability without a significant investment in new infra structure. The modern power system comes with a new generation of nonlinear loads which extensively use power electronic converters. These new nonlinear elements with their inherent nonlinearity characteristics pose new and additional challenge to electric utility systems. On the other hand intermittent loads and their temporal affects on the power quality have always been a continuous challenge. Inrush currents during induction motor start-stop are always a concern and they affect the system stability. Dynamic voltage fluctuation is always associated with induction motor starting. Flexible AC Transmission has been widely used to enhance power transmission capability and also improve the system dynamic stability. In this paper a Novel Modulated Power Filter Compensation (MPFC) Scheme developed by second author has been validated. This new device with a novel quad-loop control strategy has been tested and validated under severe fault condition and load excursions to validate the effectiveness of the MPFC device in a Single Machine Infinite Bus system (SMIB) AC system in the presence of large induction motor loads and DC Arc type nonlinear load. MATLAB-SIMULINK Software was used for digital simulation purpose to validate the effectiveness of this device in improving the power quality and system stability.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126276945","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 : 2011-12-01DOI: 10.1109/ICEAS.2011.6147189
Himanshu Babbar, Bhumika Singhal
Musical instruments have evolved manifolds in the past 50 years. From simple percussion and acoustic instruments, they have evolved into their electronic counterparts. With this evolution and the fact that these counterparts are in extensive use these days, comes the need to process these input electric signals using computers to produce the desired results and outputs. The input signals can be processed to identify the notes played on the instrument, which can then be used to generate a musical notation for the notes being played. This paper gives a detailed description about an application which generates the musical score or staff sheet for the notes being played on a semi-acoustic guitar connected to the computer, in real time. The application also implements a standard tuner based on MIDI (Musical Instrument Digital Interface) number.
{"title":"Real time staff notation generation of guitar along with standard guitar tuner","authors":"Himanshu Babbar, Bhumika Singhal","doi":"10.1109/ICEAS.2011.6147189","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147189","url":null,"abstract":"Musical instruments have evolved manifolds in the past 50 years. From simple percussion and acoustic instruments, they have evolved into their electronic counterparts. With this evolution and the fact that these counterparts are in extensive use these days, comes the need to process these input electric signals using computers to produce the desired results and outputs. The input signals can be processed to identify the notes played on the instrument, which can then be used to generate a musical notation for the notes being played. This paper gives a detailed description about an application which generates the musical score or staff sheet for the notes being played on a semi-acoustic guitar connected to the computer, in real time. The application also implements a standard tuner based on MIDI (Musical Instrument Digital Interface) number.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121042794","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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