The presented effort is the extract of a composite work. Primarily to model a dc servo-system within the available framework through observed data. The observed data of the hardware are classified as input and output samples measured at discrete instants of time and collected as an array of data for finite duration. Several input-output data sets are collected and processed to find out the model of the dc servo motor through System Identification Tool Box of MATLAB, a Graphical User Interface (GUI) based approach. The fitness of identified model is checked every time new data set is applied to choose the best fitted model. Secondarily to demonstrate in steps the ways of design and implementation of Internal Model Principle (IMP) & Finite Dimensional Repetitive Control (FDRC) based Proportional Integral Derivative (PID) controller for the plant. A similar test has been made with the system using conventional PID control. Finally, a valid comparison is carried out to show advantage, disadvantage or limitation of applied control schemes.
{"title":"Finite dimensional repetitive controller for identified model of a DC servo system","authors":"Ujjwal Mondal, A. Sengupta, Shanti Mohan Sinha, Bhaskar Das, Pradipta Ghosh","doi":"10.1109/ICPEN.2012.6492325","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492325","url":null,"abstract":"The presented effort is the extract of a composite work. Primarily to model a dc servo-system within the available framework through observed data. The observed data of the hardware are classified as input and output samples measured at discrete instants of time and collected as an array of data for finite duration. Several input-output data sets are collected and processed to find out the model of the dc servo motor through System Identification Tool Box of MATLAB, a Graphical User Interface (GUI) based approach. The fitness of identified model is checked every time new data set is applied to choose the best fitted model. Secondarily to demonstrate in steps the ways of design and implementation of Internal Model Principle (IMP) & Finite Dimensional Repetitive Control (FDRC) based Proportional Integral Derivative (PID) controller for the plant. A similar test has been made with the system using conventional PID control. Finally, a valid comparison is carried out to show advantage, disadvantage or limitation of applied control schemes.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120839644","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492327
L. Saikia, S. Debbarma, M. Pathak, Dhruba Borah, K. K. Kumar, M. Kumar
This paper deals with automatic generation control of an interconnected two area thermal system. Appropriate generation rate constraints are considered in the areas. Performances of several Classical controllers like Integral (I), Proportional plus Integral (PI), Proportional plus Integral plus Derivative (PID), Integral plus Double Derivative (IDD) are compared with newly introduced Classical Controller in AGC named as Proportional plus Integral plus Double Derivative (PIDD) controller. Investigation reveals that PIDD controller gives better dynamics than the other Controller. Further, selection of suitable value of governor speed regulation parameter (R) has been examined in presence of PIDD controller Moreover, Area Capacity effect on the system dynamic responses has been studied for the first time in AGC using PIDD Controller. System dynamic responses are examined with 1% step load perturbation in area 1.
{"title":"Automatic generation control of an interconnected thermal system using a new classical controller: A preliminary study","authors":"L. Saikia, S. Debbarma, M. Pathak, Dhruba Borah, K. K. Kumar, M. Kumar","doi":"10.1109/ICPEN.2012.6492327","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492327","url":null,"abstract":"This paper deals with automatic generation control of an interconnected two area thermal system. Appropriate generation rate constraints are considered in the areas. Performances of several Classical controllers like Integral (I), Proportional plus Integral (PI), Proportional plus Integral plus Derivative (PID), Integral plus Double Derivative (IDD) are compared with newly introduced Classical Controller in AGC named as Proportional plus Integral plus Double Derivative (PIDD) controller. Investigation reveals that PIDD controller gives better dynamics than the other Controller. Further, selection of suitable value of governor speed regulation parameter (R) has been examined in presence of PIDD controller Moreover, Area Capacity effect on the system dynamic responses has been studied for the first time in AGC using PIDD Controller. System dynamic responses are examined with 1% step load perturbation in area 1.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123364339","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492336
P. Paul, M. Sacotte, Frederic Walter
Through long global experience and test results it has been described that the aluminium wound large distribution transformers are equally good like copper wound transformers. Performance and life of transformers are same and also the parameters can be maintained identical like copper wound transformers. There will be nominal dimension increase which are normally not critical issue. The biggest advantage in today's economic turmoil, cost at initial investment can be reduced to approximately 15%. The case has been demonstrated with 950 kVA transformers conducting dynamic short circuit test at ERDA.
{"title":"Large aluminium distribution transformer","authors":"P. Paul, M. Sacotte, Frederic Walter","doi":"10.1109/ICPEN.2012.6492336","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492336","url":null,"abstract":"Through long global experience and test results it has been described that the aluminium wound large distribution transformers are equally good like copper wound transformers. Performance and life of transformers are same and also the parameters can be maintained identical like copper wound transformers. There will be nominal dimension increase which are normally not critical issue. The biggest advantage in today's economic turmoil, cost at initial investment can be reduced to approximately 15%. The case has been demonstrated with 950 kVA transformers conducting dynamic short circuit test at ERDA.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127872237","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492341
Rahul Roushan, Dipyaman Modak, Saroj Mondal, R. Paily
In this paper, a new charge pump circuit which uses single clock swing enhanced scheme to increase the output voltage is proposed. The charge pump circuitry plays a very critical role in energy harvesting, because not only it influences how much power is being extracted from the harvester, but also that its intrinsic power loss affects the net output power delivered. The charge transfer capability of a charge pump power converter depends on its implementation technology, input output voltages, circuit topology, transistor sizing, and the number of stages it has [1]. The proposed charge pump circuit is simulated in Mentor Graphics, using 0.18 µm CMOS technology library provided by TSMC. The proposed charge pump circuit achieves a higher output voltage than a traditional Dickson Charge pump. With a 1.2 V input applied, the proposed 8-stage circuit can reach 76.09 V, compared to traditional one which reaches up to 9.07 V at no load.
{"title":"On chip high voltage single clock swing enhanced charge pump circuit in 0.18 µm technology","authors":"Rahul Roushan, Dipyaman Modak, Saroj Mondal, R. Paily","doi":"10.1109/ICPEN.2012.6492341","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492341","url":null,"abstract":"In this paper, a new charge pump circuit which uses single clock swing enhanced scheme to increase the output voltage is proposed. The charge pump circuitry plays a very critical role in energy harvesting, because not only it influences how much power is being extracted from the harvester, but also that its intrinsic power loss affects the net output power delivered. The charge transfer capability of a charge pump power converter depends on its implementation technology, input output voltages, circuit topology, transistor sizing, and the number of stages it has [1]. The proposed charge pump circuit is simulated in Mentor Graphics, using 0.18 µm CMOS technology library provided by TSMC. The proposed charge pump circuit achieves a higher output voltage than a traditional Dickson Charge pump. With a 1.2 V input applied, the proposed 8-stage circuit can reach 76.09 V, compared to traditional one which reaches up to 9.07 V at no load.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115812234","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492329
L. Saikia, A. Bharali, O. Dixit, T. Malakar, B. Sharma, S. Kouli
This paper deals with the automatic generation control (AGC) of interconnected two area and three area hydro system. It is assumed that all areas in the systems operate at the same frequency because the traditional approach for interconnection of hydro systems turned out to be unsuccessful. The more recent “Bacterial Foraging Technique” is used for optimization of secondary controller gains. The performances of several classical controllers such as Integral (I), proportional - Integral (PI), Integral - derivative (ID), Proportional - Integral - derivative (PID), Integral - double derivative (IDD) have been evaluated and compared. This comparison reveals that in both two and three area system, I controller provides best dynamic performance. The two area system with I controller is also studied using electrical governor and is compared with the conventional mechanical governor. The comparison reveals that electric governor provides better performance. The comparison of responses for different controllers for a three area system with and without generation rate constraints (GRC) reveal that I controller provides better dynamic performance. The system dynamic performances are evaluated by conserving 1% step load perturbation in any area.
{"title":"Automatic generation control of multi-area hydro system using classical controllers","authors":"L. Saikia, A. Bharali, O. Dixit, T. Malakar, B. Sharma, S. Kouli","doi":"10.1109/ICPEN.2012.6492329","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492329","url":null,"abstract":"This paper deals with the automatic generation control (AGC) of interconnected two area and three area hydro system. It is assumed that all areas in the systems operate at the same frequency because the traditional approach for interconnection of hydro systems turned out to be unsuccessful. The more recent “Bacterial Foraging Technique” is used for optimization of secondary controller gains. The performances of several classical controllers such as Integral (I), proportional - Integral (PI), Integral - derivative (ID), Proportional - Integral - derivative (PID), Integral - double derivative (IDD) have been evaluated and compared. This comparison reveals that in both two and three area system, I controller provides best dynamic performance. The two area system with I controller is also studied using electrical governor and is compared with the conventional mechanical governor. The comparison reveals that electric governor provides better performance. The comparison of responses for different controllers for a three area system with and without generation rate constraints (GRC) reveal that I controller provides better dynamic performance. The system dynamic performances are evaluated by conserving 1% step load perturbation in any area.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114852389","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492344
Ayindrila Roy, J. Bera, G. Sarkar
The main objective of this paper is to monitor the phasors of voltages and currents at the sending and receiving ends of a transmission line using a microcontroller based Phasor Measurement Unit (PMU). The PMU is designed and developed to acquire the samples of voltage and current signals of the line ends in a synchronized time reference frame. The voltage and current samples from the PMUs are collected and stored in a PC using a microcontroller based Intelligent Electronic Device (IED). A MATLAB based front end graphical user interface (GUI) is developed to acquire these data using the PC's serial port. The IED coordinates all the time synchronization pulses to the PMUs and maintains a sequential routing for the data collection from them. The overall functioning of the PMUs, IED and the GUI is tested in a laboratory model of the power system and satisfactory performance is obtained.
{"title":"A state-of-the-art PMU based monitoring system with Intelligent Electronic Device using microcontroller","authors":"Ayindrila Roy, J. Bera, G. Sarkar","doi":"10.1109/ICPEN.2012.6492344","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492344","url":null,"abstract":"The main objective of this paper is to monitor the phasors of voltages and currents at the sending and receiving ends of a transmission line using a microcontroller based Phasor Measurement Unit (PMU). The PMU is designed and developed to acquire the samples of voltage and current signals of the line ends in a synchronized time reference frame. The voltage and current samples from the PMUs are collected and stored in a PC using a microcontroller based Intelligent Electronic Device (IED). A MATLAB based front end graphical user interface (GUI) is developed to acquire these data using the PC's serial port. The IED coordinates all the time synchronization pulses to the PMUs and maintains a sequential routing for the data collection from them. The overall functioning of the PMUs, IED and the GUI is tested in a laboratory model of the power system and satisfactory performance is obtained.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121541891","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492337
M. Narkhede, S. Chatterji, Smarajit Ghosh
An attempt has been made in this paper to reveal the trends and challenges in optimization techniques for operating and controlling the Microgrid, a controllable part of the smart grid. The Operation and control of Microgrid clearly fits into the broad area of multi-objective optimization problem. A critical analysis of the through literature review indicates that the alternative intelligent methods as compared to the slower conventional methods are showing better promise in the area of optimization. The latest trend shows the shift towards computational alternatives from the traditional iterative techniques (gradient based methods) due to the need of deriving near-optimum results in short periods of time. The computational alternatives include evolutionary, heuristic, and nonclassical algorithms.
{"title":"Trends and challenges in optimization techniques for operation and control of Microgrid - A review","authors":"M. Narkhede, S. Chatterji, Smarajit Ghosh","doi":"10.1109/ICPEN.2012.6492337","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492337","url":null,"abstract":"An attempt has been made in this paper to reveal the trends and challenges in optimization techniques for operating and controlling the Microgrid, a controllable part of the smart grid. The Operation and control of Microgrid clearly fits into the broad area of multi-objective optimization problem. A critical analysis of the through literature review indicates that the alternative intelligent methods as compared to the slower conventional methods are showing better promise in the area of optimization. The latest trend shows the shift towards computational alternatives from the traditional iterative techniques (gradient based methods) due to the need of deriving near-optimum results in short periods of time. The computational alternatives include evolutionary, heuristic, and nonclassical algorithms.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"35 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114123659","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492316
I. Bandyopadhyay, S. Das, P. Purkait, C. Koley
One of the most common fault in Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) feeding an induction motor is open gate drive of the switching device (IGBT). In addition to these extreme fault cases, there may be less severe faults cases due to improper contact points, problematic solder joints, poor connections etc. Main objective of this work is to develop a rule base that not only can segregate these two different types of fault cases but also can identify the power switch in which such a fault has occurred. Rigorous simulation results using PSIM software for creating all variations of the above mentioned fault cases in a PWM VSI driven induction motor is presented for diagnosing the condition of an inverter. The three phase line currents feeding the motor are recorded and transformed to d-q reference frame using Park's Transformation for further analysis. From d and q current components thus obtained, the mean current vector is calculated. The loci of the mean current vector are plotted on the d-q plane and their patterns are observed. Shapes of these loci have been found to be effective in classifying different fault modes.
{"title":"Using mean current vector to develop a rule base for identification of IGBT faults in induction motor drives","authors":"I. Bandyopadhyay, S. Das, P. Purkait, C. Koley","doi":"10.1109/ICPEN.2012.6492316","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492316","url":null,"abstract":"One of the most common fault in Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) feeding an induction motor is open gate drive of the switching device (IGBT). In addition to these extreme fault cases, there may be less severe faults cases due to improper contact points, problematic solder joints, poor connections etc. Main objective of this work is to develop a rule base that not only can segregate these two different types of fault cases but also can identify the power switch in which such a fault has occurred. Rigorous simulation results using PSIM software for creating all variations of the above mentioned fault cases in a PWM VSI driven induction motor is presented for diagnosing the condition of an inverter. The three phase line currents feeding the motor are recorded and transformed to d-q reference frame using Park's Transformation for further analysis. From d and q current components thus obtained, the mean current vector is calculated. The loci of the mean current vector are plotted on the d-q plane and their patterns are observed. Shapes of these loci have been found to be effective in classifying different fault modes.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125354475","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 : 2012-12-01DOI: 10.1109/ICPEN.2012.6492320
A. Pradhan, B. Chatterjee, S. Chakravorti
Condition assessment of in-service power transformers are becoming increasingly important for maintaining reliable and uninterruptable power supply. Among non-invasive, modern condition assessment tools, frequency domain spectroscopy is predominant in determining the aging of oil-paper insulation in power transformers. However, the results of frequency domain spectroscopy are severely influenced by other parameters, such as temperature. Also, the voltages used for studying frequency response in the laboratory are usually sinusoidal in nature. But the insulation system in operation on site is stressed by voltage that may deviate significantly from a sinusoid. Thus the use of non-sinusoidal waveform in obtaining the dielectric response is desirable for advanced insulation diagnostic technique. Considering the aforesaid facts, in this paper frequency response analysis has been performed by applying sinusoidal as well as non sinusoidal waveforms at different temperatures. A laboratory prepared oil-paper insulation sample is used that emulated the composite insulation system of a transformer. The results from sinusoidal response show a good agreement with the conventional frequency response analysis thereby validating the proposed methodology. From non-sinusoidal response, added information is obtained for closer interpretation of the actual physical condition of the sample under test.
{"title":"Comparative study on the effect of temperature on frequency domain spectroscopy results under sinusoidal and triangular excitation","authors":"A. Pradhan, B. Chatterjee, S. Chakravorti","doi":"10.1109/ICPEN.2012.6492320","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492320","url":null,"abstract":"Condition assessment of in-service power transformers are becoming increasingly important for maintaining reliable and uninterruptable power supply. Among non-invasive, modern condition assessment tools, frequency domain spectroscopy is predominant in determining the aging of oil-paper insulation in power transformers. However, the results of frequency domain spectroscopy are severely influenced by other parameters, such as temperature. Also, the voltages used for studying frequency response in the laboratory are usually sinusoidal in nature. But the insulation system in operation on site is stressed by voltage that may deviate significantly from a sinusoid. Thus the use of non-sinusoidal waveform in obtaining the dielectric response is desirable for advanced insulation diagnostic technique. Considering the aforesaid facts, in this paper frequency response analysis has been performed by applying sinusoidal as well as non sinusoidal waveforms at different temperatures. A laboratory prepared oil-paper insulation sample is used that emulated the composite insulation system of a transformer. The results from sinusoidal response show a good agreement with the conventional frequency response analysis thereby validating the proposed methodology. From non-sinusoidal response, added information is obtained for closer interpretation of the actual physical condition of the sample under test.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116508066","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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