Pub Date : 2011-12-01DOI: 10.1109/ICEAS.2011.6147214
Manohar Singh, B. K. Panigrahi, A. Abhyankar
Coordination of overcurrent relays in a meshed distribution system is a challenge task for the protection engineers. Initially it was done manually. Linear and non-linear programming optimizing techniques are very frequently used for Coordination of overcurrent relays. Presently artificial intelligence is applied for optimal co-ordination of Overcurrent (OC) relays. This paper discusses application of genetic algorithm for optimal coordination of OC relays in a loops distribution system. Combination of primary and backup relay is chosen by using graph theory, to avoid misoperation of relays.
{"title":"Optimal overcurrent relay coordination in distribution system","authors":"Manohar Singh, B. K. Panigrahi, A. Abhyankar","doi":"10.1109/ICEAS.2011.6147214","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147214","url":null,"abstract":"Coordination of overcurrent relays in a meshed distribution system is a challenge task for the protection engineers. Initially it was done manually. Linear and non-linear programming optimizing techniques are very frequently used for Coordination of overcurrent relays. Presently artificial intelligence is applied for optimal co-ordination of Overcurrent (OC) relays. This paper discusses application of genetic algorithm for optimal coordination of OC relays in a loops distribution system. Combination of primary and backup relay is chosen by using graph theory, to avoid misoperation of relays.","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":"127083595","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.2011.6147174
K. H. Mohamed, N. Sahoo, T. Ibrahim
Now-a-days, the energy extraction and conversion from the ocean waves has attracted large attention. A number of wave energy conversion systems have been proposed to convert the mechanical energy of the ocean wave into electrical energy. This paper presents a review of the status of wave energy conversion (WEC) technology and discusses the different types of devices used in present power converter technology for wave energy. Different control strategies used in this area have also been reported. In addition to that, various generator technologies used with WEC are also presented briefly. Finally, the study reports some future directions for research and development.
{"title":"A survey of technologies used in wave energy conversion systems","authors":"K. H. Mohamed, N. Sahoo, T. Ibrahim","doi":"10.1109/ICEAS.2011.6147174","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147174","url":null,"abstract":"Now-a-days, the energy extraction and conversion from the ocean waves has attracted large attention. A number of wave energy conversion systems have been proposed to convert the mechanical energy of the ocean wave into electrical energy. This paper presents a review of the status of wave energy conversion (WEC) technology and discusses the different types of devices used in present power converter technology for wave energy. Different control strategies used in this area have also been reported. In addition to that, various generator technologies used with WEC are also presented briefly. Finally, the study reports some future directions for research and development.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"30 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":"127549044","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.2011.6147108
K. R. Krishnanand, P. Balasubramanyam, S. K. Swain, P. Dash
A methodology for fault location calculation of transmission lines using S-transform based spectral energy feature space and multi-layer perceptron is presented in this paper. S-transform being capable of providing the time domain and frequency domain information at the same time, gives remarkable insight in to the protection issues of a transmission line. The energy distributions of the faulted current waveforms are used to compute the fault location using the pattern recognition approach. This paper proposes the fault detection and classification through S-transform energy by using synchronized measurement of the differential and average energy of current signals. The S-transform energy calculations are used for fault location using a neural network.
{"title":"S-transform based spectral energy feature space for fault location approximation","authors":"K. R. Krishnanand, P. Balasubramanyam, S. K. Swain, P. Dash","doi":"10.1109/ICEAS.2011.6147108","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147108","url":null,"abstract":"A methodology for fault location calculation of transmission lines using S-transform based spectral energy feature space and multi-layer perceptron is presented in this paper. S-transform being capable of providing the time domain and frequency domain information at the same time, gives remarkable insight in to the protection issues of a transmission line. The energy distributions of the faulted current waveforms are used to compute the fault location using the pattern recognition approach. This paper proposes the fault detection and classification through S-transform energy by using synchronized measurement of the differential and average energy of current signals. The S-transform energy calculations are used for fault location using a neural network.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"110 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":"126113738","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.2011.6147130
Rajendra Kumar Khadanga, S. Panda
This paper presents a systematic approach for designing Unified Power Flow Controller (UPFC) based supplementary damping controllers for damping low frequency oscillations in a single-machine infinite-bus power system. The detailed investigations have been carried out considering the four alternatives UPFC based damping controller. These are modulating index of series inverter (mB), modulating index of shunt inverter (mE), phase angle of series inverter (δB) and phase angle of the shunt inverter (δE). The design problem of the proposed controllers is formulated as an optimization problem and Gravitational Search Algorithm is employed to optimize damping controller parameters. Simulation results are presented and compared with a conventional method of tuning the damping controller parameters to show the effectiveness and robustness of the proposed design approach.
{"title":"Gravitational search algorithm for Unified Power Flow Controller based damping controller design","authors":"Rajendra Kumar Khadanga, S. Panda","doi":"10.1109/ICEAS.2011.6147130","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147130","url":null,"abstract":"This paper presents a systematic approach for designing Unified Power Flow Controller (UPFC) based supplementary damping controllers for damping low frequency oscillations in a single-machine infinite-bus power system. The detailed investigations have been carried out considering the four alternatives UPFC based damping controller. These are modulating index of series inverter (mB), modulating index of shunt inverter (mE), phase angle of series inverter (δB) and phase angle of the shunt inverter (δE). The design problem of the proposed controllers is formulated as an optimization problem and Gravitational Search Algorithm is employed to optimize damping controller parameters. Simulation results are presented and compared with a conventional method of tuning the damping controller parameters to show the effectiveness and robustness of the proposed design approach.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"27 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":"116042456","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.2011.6147212
A. Sharaf, M. Şahin
The paper presents a novel photo-voltaic PV powered battery charging station. The flexible scheme developed by the first Author is controlled by a FACTS-based Green Plug-Filter Compensator GPFC to ensure efficient utilization and DC-common bus stabilization. The multi-regulator multi-loop error driven modified PID-controller ensures efficient fast charging and full DC bus stabilization under load excursions and fault condition.
{"title":"A novel photovoltaic PV-powered battery charging scheme for electric vehicles","authors":"A. Sharaf, M. Şahin","doi":"10.1109/ICEAS.2011.6147212","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147212","url":null,"abstract":"The paper presents a novel photo-voltaic PV powered battery charging station. The flexible scheme developed by the first Author is controlled by a FACTS-based Green Plug-Filter Compensator GPFC to ensure efficient utilization and DC-common bus stabilization. The multi-regulator multi-loop error driven modified PID-controller ensures efficient fast charging and full DC bus stabilization under load excursions and fault condition.","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":"122610957","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.2011.6147072
P. Ray, B. K. Panigrahi, N. Senroy
The main objective of this paper is to accurately estimate the fault location in a series compensated transmission line using integration of discrete wavelet transform, particle swarm optimization (PSO) and support vector machine based algorithm. Estimation of accurate fault location will lead to quicker restoration of the supply. Instantaneous values of faulty current, voltage and power signals are available at the relay location. Using 10-level Discrete Wavelet Transform (DWT), the available signals are decomposed and thereafter the statistical features are obtained from the decomposed signals. Forward feature selection algorithm is used to select the best feature set. Selected features are then applied to the support vector machine (SVM) for estimating the fault distance. PSO algorithm is used to select the best SVM parameter by global searching technique. Proposed fault locator has been trained and tested for different fault scenarios (fault resistance and phase difference). The test results demonstrate that the adopted technique is a reliable method for estimating fault locations accurately.
{"title":"An AI approach for fault distance estimation in series compensated transmission line","authors":"P. Ray, B. K. Panigrahi, N. Senroy","doi":"10.1109/ICEAS.2011.6147072","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147072","url":null,"abstract":"The main objective of this paper is to accurately estimate the fault location in a series compensated transmission line using integration of discrete wavelet transform, particle swarm optimization (PSO) and support vector machine based algorithm. Estimation of accurate fault location will lead to quicker restoration of the supply. Instantaneous values of faulty current, voltage and power signals are available at the relay location. Using 10-level Discrete Wavelet Transform (DWT), the available signals are decomposed and thereafter the statistical features are obtained from the decomposed signals. Forward feature selection algorithm is used to select the best feature set. Selected features are then applied to the support vector machine (SVM) for estimating the fault distance. PSO algorithm is used to select the best SVM parameter by global searching technique. Proposed fault locator has been trained and tested for different fault scenarios (fault resistance and phase difference). The test results demonstrate that the adopted technique is a reliable method for estimating fault locations accurately.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"189 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":"129146310","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.2011.6147080
K. Roy, D. Chatterjee, A. K. Ganguli
Self excited induction generators (SEIG) are being widely used in wind power generation, especially for supplying electric power in remote areas. The major problem of such generation is to maintain constant voltage and frequency under variable load and variable wind speed condition. In this paper a control strategy involving supply of reactive power to the generator partially through fixed capacitor bank connected at the stator terminals and switched dc power source is proposed for constant voltage and constant frequency operation. The dc source can be a battery charged from the generator during a light loaded condition. The method is simple and can be implemented through a low cost inverter of smaller size for supplying reactive power only and for a large change in operating condition another additional set of fixed capacitor can be switched to reduce the reactive power loading on the inverter. Suitable simulations and experiments are performed to validate the proposed concept.
{"title":"An improved control strategy of self excited induction generator taking magnetization nonlinearity","authors":"K. Roy, D. Chatterjee, A. K. Ganguli","doi":"10.1109/ICEAS.2011.6147080","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147080","url":null,"abstract":"Self excited induction generators (SEIG) are being widely used in wind power generation, especially for supplying electric power in remote areas. The major problem of such generation is to maintain constant voltage and frequency under variable load and variable wind speed condition. In this paper a control strategy involving supply of reactive power to the generator partially through fixed capacitor bank connected at the stator terminals and switched dc power source is proposed for constant voltage and constant frequency operation. The dc source can be a battery charged from the generator during a light loaded condition. The method is simple and can be implemented through a low cost inverter of smaller size for supplying reactive power only and for a large change in operating condition another additional set of fixed capacitor can be switched to reduce the reactive power loading on the inverter. Suitable simulations and experiments are performed to validate the proposed concept.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"46 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":"129113246","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.2011.6147120
P. Basak, S. Chowdhury, S. Chowdhury, S. H. nee Dey
In this paper a typical microgrid is modeled and simulated based on several logical assumptions and the same is studied for steady and transient state analysis in grid connected and islanded mode with critical and non-critical load selectivity in the perspective of integration of distributed energy resources. The authors present the simulation of microgrid by Powergui interfacing of Simulink using Matlab software in such a manner that a study of waveforms of voltage, current and power in selective points in the microgrid system is possible. Since microgrid is an interconnected system of distributed energy resources, utility grid and loads; there are immense chances of fluctuation of any one of those components and the disturbances are to be analyzed through simulation in planning stage for successful on-site operation in future. Among many factors and type of disturbances and response, as a typical case, the present microgrid model is studied for step change in grid voltage and the corresponding response in the line currents are presented with their waveforms showing peak responses, settling time, rise time etc. using LTI viewer toolbox of Simulink, Matlab. The results are discussed and analyzed for microgrid modeling in the perspective of integration of DERs.
{"title":"Simulation of microgrid in the perspective of integration of distributed energy resources","authors":"P. Basak, S. Chowdhury, S. Chowdhury, S. H. nee Dey","doi":"10.1109/ICEAS.2011.6147120","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147120","url":null,"abstract":"In this paper a typical microgrid is modeled and simulated based on several logical assumptions and the same is studied for steady and transient state analysis in grid connected and islanded mode with critical and non-critical load selectivity in the perspective of integration of distributed energy resources. The authors present the simulation of microgrid by Powergui interfacing of Simulink using Matlab software in such a manner that a study of waveforms of voltage, current and power in selective points in the microgrid system is possible. Since microgrid is an interconnected system of distributed energy resources, utility grid and loads; there are immense chances of fluctuation of any one of those components and the disturbances are to be analyzed through simulation in planning stage for successful on-site operation in future. Among many factors and type of disturbances and response, as a typical case, the present microgrid model is studied for step change in grid voltage and the corresponding response in the line currents are presented with their waveforms showing peak responses, settling time, rise time etc. using LTI viewer toolbox of Simulink, Matlab. The results are discussed and analyzed for microgrid modeling in the perspective of integration of DERs.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"24 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":"123840170","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.2011.6147134
S. Bhuyan, S. K. Panda, K. Sivanand, R. Kumar
A compact wireless energy transfer scheme for delivering power to the implantable electronic devices has been presented here. The wireless energy transfer system is built by using a printed spiral receiving resonator with a cylindrical source resonator to transfer energy wirelessly through strongly coupled magnetic resonance. Experimentally, it is found that the wireless power transfer efficiency reaches the maximum at the resonant frequency, and the efficiency decreases with the increase of the distance between the source and receiver coils. The proposed design has the significant advantage of being easier to implement for biomedical applications due to sizeable reduction in volume required on the implantable devices.
{"title":"A compact resonace-based wireless energy transfer system for implanted electronic devices","authors":"S. Bhuyan, S. K. Panda, K. Sivanand, R. Kumar","doi":"10.1109/ICEAS.2011.6147134","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147134","url":null,"abstract":"A compact wireless energy transfer scheme for delivering power to the implantable electronic devices has been presented here. The wireless energy transfer system is built by using a printed spiral receiving resonator with a cylindrical source resonator to transfer energy wirelessly through strongly coupled magnetic resonance. Experimentally, it is found that the wireless power transfer efficiency reaches the maximum at the resonant frequency, and the efficiency decreases with the increase of the distance between the source and receiver coils. The proposed design has the significant advantage of being easier to implement for biomedical applications due to sizeable reduction in volume required on the implantable devices.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"52 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":"121499432","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.2011.6147074
M. Biswal, B. B. Pati, A. Pradhan
This paper presents a directional relaying algorithm based on voting technique for the protection of series compensated line where the capacitors are present at both the ends of the line. The directional relaying issues in series compensated line related to voltage inversion, current inversion, high resistance fault and load change are addressed. Four classifiers based on positive and negative sequence components are selected and integrated using the voting technique to derive the final decision. The technique is evaluated using data simulated with EMTDC/PSCAD for a series compensated line and the dynamic performance of the algorithm is also studied. The integration approach is found to be advantageous.
{"title":"Directional relaying of series compensated line using an integrated approach","authors":"M. Biswal, B. B. Pati, A. Pradhan","doi":"10.1109/ICEAS.2011.6147074","DOIUrl":"https://doi.org/10.1109/ICEAS.2011.6147074","url":null,"abstract":"This paper presents a directional relaying algorithm based on voting technique for the protection of series compensated line where the capacitors are present at both the ends of the line. The directional relaying issues in series compensated line related to voltage inversion, current inversion, high resistance fault and load change are addressed. Four classifiers based on positive and negative sequence components are selected and integrated using the voting technique to derive the final decision. The technique is evaluated using data simulated with EMTDC/PSCAD for a series compensated line and the dynamic performance of the algorithm is also studied. The integration approach is found to be advantageous.","PeriodicalId":273164,"journal":{"name":"2011 International Conference on Energy, Automation and Signal","volume":"132 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":"115900544","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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