Pub Date : 1900-01-01DOI: 10.1109/IPEC.2005.206954
L. Jiping, C. Ying, Yang Xue, Wenyuan Li
A transformer model considering the hysteresis effect is presented first and magnetic inrushes and short-circuit faults are simulated with this model. The wavelet transform is a powerful tool in the analysis of power transformer transient phenomena because of its ability to extract information from transient signals simultaneously in both the time and frequency domains. This paper proposes a new wavelet-based method to identify an internal fault and distinguish it from an inrush current or an external fault. The simulation results demonstrated effectiveness and feasibility of the presented method
{"title":"An approach to power transformer protection based on wavelet transform","authors":"L. Jiping, C. Ying, Yang Xue, Wenyuan Li","doi":"10.1109/IPEC.2005.206954","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206954","url":null,"abstract":"A transformer model considering the hysteresis effect is presented first and magnetic inrushes and short-circuit faults are simulated with this model. The wavelet transform is a powerful tool in the analysis of power transformer transient phenomena because of its ability to extract information from transient signals simultaneously in both the time and frequency domains. This paper proposes a new wavelet-based method to identify an internal fault and distinguish it from an inrush current or an external fault. The simulation results demonstrated effectiveness and feasibility of the presented method","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128436118","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 : 1900-01-01DOI: 10.1109/IPEC.2005.207006
Mei Shengwei, Xue Ancheng, W. Xiaofeng, He Fei
The collapse and blackout caused by cascading failures in power system is a difficult problem. This work is concerned with the mechanism of collapse in large power systems. Firstly, a AC model for blackout is employed with OPF, which can describe the whole process of power system accurately; second, an algorithm is given to model the cascading failures with overloads and outages; thirdly, simulation performed on IEEE-30 bus system has verified that the proposed model and algorithm can reveal some collapse characteristics such as load level, outage lines and network structure
{"title":"Modeling collapse and blackout of power system via AC-based model","authors":"Mei Shengwei, Xue Ancheng, W. Xiaofeng, He Fei","doi":"10.1109/IPEC.2005.207006","DOIUrl":"https://doi.org/10.1109/IPEC.2005.207006","url":null,"abstract":"The collapse and blackout caused by cascading failures in power system is a difficult problem. This work is concerned with the mechanism of collapse in large power systems. Firstly, a AC model for blackout is employed with OPF, which can describe the whole process of power system accurately; second, an algorithm is given to model the cascading failures with overloads and outages; thirdly, simulation performed on IEEE-30 bus system has verified that the proposed model and algorithm can reveal some collapse characteristics such as load level, outage lines and network structure","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129540668","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 : 1900-01-01DOI: 10.1109/IPEC.2005.207063
R. Gajbhiye, P. Kulkarni, S. Soman
Analysis of faulted power systems in 3-phase coordinates is desirable when dealing with unbalanced networks and complex faults. Thevenin's model in 3-phase domain is well-known for shunt faults. However, lack of generic circuit model for series and simultaneous faults is an impediment, as it sacrifices both simplicity and computational efficiency. In this paper, we extend this approach to arbitrarily complex faults. Case studies with complex faults on two example systems demonstrate the claims made in the paper
{"title":"Analysis of faulted power systems in three phase coordinates - a generic approach","authors":"R. Gajbhiye, P. Kulkarni, S. Soman","doi":"10.1109/IPEC.2005.207063","DOIUrl":"https://doi.org/10.1109/IPEC.2005.207063","url":null,"abstract":"Analysis of faulted power systems in 3-phase coordinates is desirable when dealing with unbalanced networks and complex faults. Thevenin's model in 3-phase domain is well-known for shunt faults. However, lack of generic circuit model for series and simultaneous faults is an impediment, as it sacrifices both simplicity and computational efficiency. In this paper, we extend this approach to arbitrarily complex faults. Case studies with complex faults on two example systems demonstrate the claims made in the paper","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129604667","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 : 1900-01-01DOI: 10.1109/IPEC.2005.206933
S. Birlasekaran
In this relaxation study, the relationship of relaxation characteristics of pure oil, pure pressboard and composite insulation of oil-impregnated pressboard is studied with reference to equilibrium and geometry. Low frequency response of dielectrics is very sensitive to moisture movement and temperature of operation due to variation of relaxation characteristics. In this the roles of components of composite insulation on the integrated insulation system and the geometry have to be explored with application point of view where the geometry of operating oil-filled transformer and the layout of the components vary from one design to another. A simple laboratory study with two components suggests that a simple model can be come up to predict the behavior of composite insulation. Also, it is found that all the insulation characteristics vary with equilibrium time in a narrow band even when the samples were kept in sealed chamber. The model is found to be valid irrespective of geometrical size
{"title":"Relaxation studies on oil, pressboard and oil-impregnated pressboard","authors":"S. Birlasekaran","doi":"10.1109/IPEC.2005.206933","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206933","url":null,"abstract":"In this relaxation study, the relationship of relaxation characteristics of pure oil, pure pressboard and composite insulation of oil-impregnated pressboard is studied with reference to equilibrium and geometry. Low frequency response of dielectrics is very sensitive to moisture movement and temperature of operation due to variation of relaxation characteristics. In this the roles of components of composite insulation on the integrated insulation system and the geometry have to be explored with application point of view where the geometry of operating oil-filled transformer and the layout of the components vary from one design to another. A simple laboratory study with two components suggests that a simple model can be come up to predict the behavior of composite insulation. Also, it is found that all the insulation characteristics vary with equilibrium time in a narrow band even when the samples were kept in sealed chamber. The model is found to be valid irrespective of geometrical size","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127458977","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 : 1900-01-01DOI: 10.1109/IPEC.2005.206994
S. Dechanupaprittha, K. Hongesombut, Y. Mitani, I. Ngamroo
This paper focuses on the application of a controllable distributed generator (CDG) for stabilization of tie-line power oscillations in an interconnected power system including wind farms. While concerning adverse effects of wind power, CDG is utilized to improve the damping performance of a power system. The designed controller has a structure of second-order lead/lag compensator. In particular, the control design problem is formulated as an optimization problem and a tabu search algorithm is employed to automatically obtain the parameters of the designed controller. Consequently, results and evaluations are carried out to illustrate the performance and effectiveness of the proposed control scheme
{"title":"Frequency stabilization of interconnected power system with wind farms by controllable distributed generator","authors":"S. Dechanupaprittha, K. Hongesombut, Y. Mitani, I. Ngamroo","doi":"10.1109/IPEC.2005.206994","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206994","url":null,"abstract":"This paper focuses on the application of a controllable distributed generator (CDG) for stabilization of tie-line power oscillations in an interconnected power system including wind farms. While concerning adverse effects of wind power, CDG is utilized to improve the damping performance of a power system. The designed controller has a structure of second-order lead/lag compensator. In particular, the control design problem is formulated as an optimization problem and a tabu search algorithm is employed to automatically obtain the parameters of the designed controller. Consequently, results and evaluations are carried out to illustrate the performance and effectiveness of the proposed control scheme","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127479426","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 : 1900-01-01DOI: 10.1109/IPEC.2005.206908
Zhongning Wang, Heng Fan, Shufen Wang, Guangyuan Wang
A new bilevel programming model combined the reactive power optimization and the voltage stability is presented in this paper. A hybrid algorithm, based on the genetic algorithm and simulated annealing algorithm to solve this bilevel programming model of the reactive power optimization, is constructed. Testing results of applying the algorithm to an IEEE-30 bus system and an IEEE-6 bus system shows feasibility and efficiency of algorithm. Consequently, blind adjustment of local voltage in nowadays electric power system is solved effectively, at the same time, the dispatch center adjusts and controls the voltage level of bus and active power losses successfully
{"title":"A bilevel programming model for the reactive power optimization","authors":"Zhongning Wang, Heng Fan, Shufen Wang, Guangyuan Wang","doi":"10.1109/IPEC.2005.206908","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206908","url":null,"abstract":"A new bilevel programming model combined the reactive power optimization and the voltage stability is presented in this paper. A hybrid algorithm, based on the genetic algorithm and simulated annealing algorithm to solve this bilevel programming model of the reactive power optimization, is constructed. Testing results of applying the algorithm to an IEEE-30 bus system and an IEEE-6 bus system shows feasibility and efficiency of algorithm. Consequently, blind adjustment of local voltage in nowadays electric power system is solved effectively, at the same time, the dispatch center adjusts and controls the voltage level of bus and active power losses successfully","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130510763","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 : 1900-01-01DOI: 10.1109/IPEC.2005.206887
P. K. Katti, M. Khedkar
Over 1.6 billion people living in the rural areas of the poorest regions of the world, especially in sub-Saharan Africa and South Asia lack access to modern forms of energy services. In addition, currently used sources of energy for cooking and heating (wood, crop residues, charcoal, etc.) are a serious source of indoor pollution, causing environmental and health problems and contributing to deforestation. Energy is a prerequisite for sustainable development and for fighting poverty. Availability of affordable and sustainable energy to all people is critical to the achievement of the millennium development goals and its contributions impact in various ways. In the context this article has the objectives of emphasizing certain prime issues, challenges and probable solution for the promotion of renewable energy technologies (RET) in an integrated way and stimulates on the removal of barriers on implementation strategies in the region of South Asia in general and India in particular. For the ease of understanding a simple integrated model and the results for a remote site has been presented along with the benefits of the system to rural area power supply
{"title":"Towards sustainable energy systems: integrating renewable energy sources is the key for rural area power supply","authors":"P. K. Katti, M. Khedkar","doi":"10.1109/IPEC.2005.206887","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206887","url":null,"abstract":"Over 1.6 billion people living in the rural areas of the poorest regions of the world, especially in sub-Saharan Africa and South Asia lack access to modern forms of energy services. In addition, currently used sources of energy for cooking and heating (wood, crop residues, charcoal, etc.) are a serious source of indoor pollution, causing environmental and health problems and contributing to deforestation. Energy is a prerequisite for sustainable development and for fighting poverty. Availability of affordable and sustainable energy to all people is critical to the achievement of the millennium development goals and its contributions impact in various ways. In the context this article has the objectives of emphasizing certain prime issues, challenges and probable solution for the promotion of renewable energy technologies (RET) in an integrated way and stimulates on the removal of barriers on implementation strategies in the region of South Asia in general and India in particular. For the ease of understanding a simple integrated model and the results for a remote site has been presented along with the benefits of the system to rural area power supply","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129199892","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 : 1900-01-01DOI: 10.1109/IPEC.2005.206896
S. C. Soh, S. G. Kerk
EMA was created in 2001 to regulate the electricity and gas industries. With the deregulation process, large contestable consumers are allowed to purchase power from different retailers. This has lead to a drop in their costs of electricity by about 6%, showcasing the benefits of introducing competition in the electricity market. Furthermore, as the demand for power changes from reliability to quality, the need to improve on metering has evolved, for both utility and end consumers, from collecting consumption to real-time power quality (PQ) information as part of a complete energy management program. With the advent of rising oil prices, escalating electricity tariffs and the opportunities from de-regulation, it had been a rapidly changing scene in the use of technologies and application for automatic metering for the last few years. This paper intends to provide an insight on the growth and changes of the electricity market and metering trends in Singapore on how they shape each other by exploring case studies of some recent projects utilising AMR technologies for their energy management systems
{"title":"The electricity and metering trends in Singapore","authors":"S. C. Soh, S. G. Kerk","doi":"10.1109/IPEC.2005.206896","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206896","url":null,"abstract":"EMA was created in 2001 to regulate the electricity and gas industries. With the deregulation process, large contestable consumers are allowed to purchase power from different retailers. This has lead to a drop in their costs of electricity by about 6%, showcasing the benefits of introducing competition in the electricity market. Furthermore, as the demand for power changes from reliability to quality, the need to improve on metering has evolved, for both utility and end consumers, from collecting consumption to real-time power quality (PQ) information as part of a complete energy management program. With the advent of rising oil prices, escalating electricity tariffs and the opportunities from de-regulation, it had been a rapidly changing scene in the use of technologies and application for automatic metering for the last few years. This paper intends to provide an insight on the growth and changes of the electricity market and metering trends in Singapore on how they shape each other by exploring case studies of some recent projects utilising AMR technologies for their energy management systems","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116130787","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 : 1900-01-01DOI: 10.1109/IPEC.2005.206977
Tan Yong Peow, Loi Boon Toon, S. Goh
The project life cycle of the power system in the railway system starts from the concept study on the power system and its requirements. The study focuses on critical engineering and operational requirements like EMC, earthing and bonding system, stray current, emergency loadings, uninterrupted power requirements etc. The paper presents the project life-cycle of an integrated asset and design management of the power system in a railway system. The lifecycle stages starts from concept study to the decommissioning of the system. Asset management study is carried out on how the equipment maintenance and replacement are tracked by a maintenance management tool. The life-cycle carries on to design, procurement, manufacturing, installation, testing, operation and asset replacement
{"title":"Asset management of the power system in a rail system","authors":"Tan Yong Peow, Loi Boon Toon, S. Goh","doi":"10.1109/IPEC.2005.206977","DOIUrl":"https://doi.org/10.1109/IPEC.2005.206977","url":null,"abstract":"The project life cycle of the power system in the railway system starts from the concept study on the power system and its requirements. The study focuses on critical engineering and operational requirements like EMC, earthing and bonding system, stray current, emergency loadings, uninterrupted power requirements etc. The paper presents the project life-cycle of an integrated asset and design management of the power system in a railway system. The lifecycle stages starts from concept study to the decommissioning of the system. Asset management study is carried out on how the equipment maintenance and replacement are tracked by a maintenance management tool. The life-cycle carries on to design, procurement, manufacturing, installation, testing, operation and asset replacement","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116238418","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 : 1900-01-01DOI: 10.1109/IPEC.2005.207079
Jason E. James, J. Boys, G. Covic
A practical dynamic inductor-tuning circuit for a parallel resonant ICPT power pickup operating at 38.4 kHz is described. The method controls the current through a tuning inductor by varying the turn on delay of two power switches. This varies the inductor current so that the tank may be maintained at resonance. Supporting mathematical analysis, circuit simulation and prototype measurements are included. Experimental results have verified the system behaviour
{"title":"A variable inductor based tuning method for ICPT pickups","authors":"Jason E. James, J. Boys, G. Covic","doi":"10.1109/IPEC.2005.207079","DOIUrl":"https://doi.org/10.1109/IPEC.2005.207079","url":null,"abstract":"A practical dynamic inductor-tuning circuit for a parallel resonant ICPT power pickup operating at 38.4 kHz is described. The method controls the current through a tuning inductor by varying the turn on delay of two power switches. This varies the inductor current so that the tank may be maintained at resonance. Supporting mathematical analysis, circuit simulation and prototype measurements are included. Experimental results have verified the system behaviour","PeriodicalId":164802,"journal":{"name":"2005 International Power Engineering Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116262364","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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