Pub Date : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356913
Seok-gon Kim, Chang-ho Park
Function and role of electricity meter is changing significantly along with IT technology development. In North America and Europe area, especially, and major electric power companies in the world, demand for mechanical electricity meter is decreasing while electronic electricity meter implementation is continually increasing. Korea Electric Power Corporation (KEPCO), a Korean electric power company, started full scale introducing electronic electricity meter from 2000. Most of the high voltage electricity meters have been changed with electronic type electricity meter. Mechanical electricity meters work as major part in low voltage currently, but these are expected to be changed with the electronic type electricity meter near future. In relation with this situation, future electricity meter operation and maintenance will be focused to electronic type. This study introduce infrastructure construction for the quality improvement of electricity meters, performance analysis for expired meters based on available period, and investigate possibility of extending its lifetime.
{"title":"Infrastructure construction for meter test and performance analysis for expired meters based on available period","authors":"Seok-gon Kim, Chang-ho Park","doi":"10.1109/TD-ASIA.2009.5356913","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356913","url":null,"abstract":"Function and role of electricity meter is changing significantly along with IT technology development. In North America and Europe area, especially, and major electric power companies in the world, demand for mechanical electricity meter is decreasing while electronic electricity meter implementation is continually increasing. Korea Electric Power Corporation (KEPCO), a Korean electric power company, started full scale introducing electronic electricity meter from 2000. Most of the high voltage electricity meters have been changed with electronic type electricity meter. Mechanical electricity meters work as major part in low voltage currently, but these are expected to be changed with the electronic type electricity meter near future. In relation with this situation, future electricity meter operation and maintenance will be focused to electronic type. This study introduce infrastructure construction for the quality improvement of electricity meters, performance analysis for expired meters based on available period, and investigate possibility of extending its lifetime.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128774095","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356872
Young hwan Kim, Se Ho Kim, Eel-Hwan Kim, Jee Yoon Kang
This paper shows how the capacity credit of wind power in Korea-Jeju. As more wind capacity is added in the nation, the question of wind's capacity credit(effective of capacity or capacity value) is raised. This paper introduces methodologies for Korea-Jeju, and it provides seasonal rates of the capacity credit of wind power plant. So, this paper provides a good reference to establish the Korea power supply master plan.
{"title":"The capacity credit of wind power in Korea-Jeju","authors":"Young hwan Kim, Se Ho Kim, Eel-Hwan Kim, Jee Yoon Kang","doi":"10.1109/TD-ASIA.2009.5356872","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356872","url":null,"abstract":"This paper shows how the capacity credit of wind power in Korea-Jeju. As more wind capacity is added in the nation, the question of wind's capacity credit(effective of capacity or capacity value) is raised. This paper introduces methodologies for Korea-Jeju, and it provides seasonal rates of the capacity credit of wind power plant. So, this paper provides a good reference to establish the Korea power supply master plan.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125835633","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356829
Li Bei, Guo Jian-bo, Lai Xiao-kang, Hui Dong
The group technology, which leads battery cell combined in series-parallel ways scientifically, is the basis of large scale application of Battery Energy Storage System (BESS). Especially for VRB, as it holds a unique structure of hydraulic interconnection pipe system, the combination of electrical connection and hydraulic connection should be more challenging to the group technology. On the basis of experimental study of Vanadium Redox Flow Battery (VRB), the reliability, efficiency and economic analysis of battery group technology are discussed from the viewpoint of engineering application in this paper.
{"title":"Study on grouping technology of Redox Flow Battery","authors":"Li Bei, Guo Jian-bo, Lai Xiao-kang, Hui Dong","doi":"10.1109/TD-ASIA.2009.5356829","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356829","url":null,"abstract":"The group technology, which leads battery cell combined in series-parallel ways scientifically, is the basis of large scale application of Battery Energy Storage System (BESS). Especially for VRB, as it holds a unique structure of hydraulic interconnection pipe system, the combination of electrical connection and hydraulic connection should be more challenging to the group technology. On the basis of experimental study of Vanadium Redox Flow Battery (VRB), the reliability, efficiency and economic analysis of battery group technology are discussed from the viewpoint of engineering application in this paper.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127426929","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356997
Lucheng Hong, Libao Shi, L. Yao, Y. Ni, M. Bazargan
In this paper, the probability theory and fuzzy sets theory were employed to carry out the studies on power system load flow analysis with consideration of wind generation uncertainties. Based on the Possibility/Probability Consistency Principle, the original measurement based wind speed probability density distribution was transformed to the wind speed possibility distribution firstly. The fuzzy model of power output from squirrel cage induction generator (SCIG) was then built in accordance with a simplified power-speed curve of SCIG. The proposed fuzzy model was linearized further for simplicity. And the sensitivity analysis based method was employed to carry out and obtain the possibility distribution of fuzzy load flow solutions. The modified IEEE 14-bus system was used as benchmark to carry out the case studies. Numerical results have demonstrated the validity and effectiveness of the proposed model and method.
{"title":"Study on fuzzy load flow with consideration of wind generation uncertainties","authors":"Lucheng Hong, Libao Shi, L. Yao, Y. Ni, M. Bazargan","doi":"10.1109/TD-ASIA.2009.5356997","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356997","url":null,"abstract":"In this paper, the probability theory and fuzzy sets theory were employed to carry out the studies on power system load flow analysis with consideration of wind generation uncertainties. Based on the Possibility/Probability Consistency Principle, the original measurement based wind speed probability density distribution was transformed to the wind speed possibility distribution firstly. The fuzzy model of power output from squirrel cage induction generator (SCIG) was then built in accordance with a simplified power-speed curve of SCIG. The proposed fuzzy model was linearized further for simplicity. And the sensitivity analysis based method was employed to carry out and obtain the possibility distribution of fuzzy load flow solutions. The modified IEEE 14-bus system was used as benchmark to carry out the case studies. Numerical results have demonstrated the validity and effectiveness of the proposed model and method.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122946595","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356965
Jeongje Park, Wu Liang, Jaeseok Choi, D. Jeon, T. Tran, R. Billinton
The importance and conducting necessity studies on grid reliability evaluation have been increasingly important in recent years due to the number of black-out events occurring through in the world. Quantity evaluation of transmission system reliability is very important in a competitive electricity environment. The reason is that the successful operation of electric power under a deregulated electricity market depends on transmission system reliability management. Also in Korea it takes places. The results of many case studies for the KEPCO system using the Transmission Reliability Evaluation for Large-Scale Systems (TRELSS) Version 6_2, a program developed by EPRI are introduced in this paper. Some sensitivity analysis has been included in case study. This paper presents the reliability analysis of KEPCO system expansion planning, fourth supply plan, by using TRELSS program.
{"title":"Reliability evaluation of grid in Korea: Fourth supply plan","authors":"Jeongje Park, Wu Liang, Jaeseok Choi, D. Jeon, T. Tran, R. Billinton","doi":"10.1109/TD-ASIA.2009.5356965","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356965","url":null,"abstract":"The importance and conducting necessity studies on grid reliability evaluation have been increasingly important in recent years due to the number of black-out events occurring through in the world. Quantity evaluation of transmission system reliability is very important in a competitive electricity environment. The reason is that the successful operation of electric power under a deregulated electricity market depends on transmission system reliability management. Also in Korea it takes places. The results of many case studies for the KEPCO system using the Transmission Reliability Evaluation for Large-Scale Systems (TRELSS) Version 6_2, a program developed by EPRI are introduced in this paper. Some sensitivity analysis has been included in case study. This paper presents the reliability analysis of KEPCO system expansion planning, fourth supply plan, by using TRELSS program.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124081250","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356957
M. Kezunovic
The latest technology development makes many intelligent electronic devices (IEDs) available in substations today. This brings an opportunity for adding new functionalities that go well beyond what the traditional substation automation solutions have provided. The substation automation role in automated fault analysis may be expanding towards better serving many utility groups: operations, protection and asset management.
{"title":"Automated fault analysis in a smart grid","authors":"M. Kezunovic","doi":"10.1109/TD-ASIA.2009.5356957","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356957","url":null,"abstract":"The latest technology development makes many intelligent electronic devices (IEDs) available in substations today. This brings an opportunity for adding new functionalities that go well beyond what the traditional substation automation solutions have provided. The substation automation role in automated fault analysis may be expanding towards better serving many utility groups: operations, protection and asset management.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124209843","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5357024
T. Koshizuka, H. Kusuyama, M. Saito, H. Maehara, Y. Sato, H. Toda
When an unloaded transformer is being energized, a large inrush current may flow depending upon the residual flux in the core of the transformer and the closing phase of the circuit breaker. A large inrush current may cause voltage fluctuations in the transmission system. One method of suppressing the inrush current is to perform controlled switching of the circuit breaker. In this paper, a new method of controlled switching of a 3-phase transformer in an isolated neutral system was examined. A method employing 3-phase circuit breakers with one operating mechanism and also single phase circuit breakers was used to devise a method of control switching for suppressing inrush current when the transformer is energized. In experiment using a 3 kV transformer, actual inrush currents were greatly suppressed.
{"title":"Controlled switching for energizing 3-phase transformers in isolated neutral system","authors":"T. Koshizuka, H. Kusuyama, M. Saito, H. Maehara, Y. Sato, H. Toda","doi":"10.1109/TD-ASIA.2009.5357024","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5357024","url":null,"abstract":"When an unloaded transformer is being energized, a large inrush current may flow depending upon the residual flux in the core of the transformer and the closing phase of the circuit breaker. A large inrush current may cause voltage fluctuations in the transmission system. One method of suppressing the inrush current is to perform controlled switching of the circuit breaker. In this paper, a new method of controlled switching of a 3-phase transformer in an isolated neutral system was examined. A method employing 3-phase circuit breakers with one operating mechanism and also single phase circuit breakers was used to devise a method of control switching for suppressing inrush current when the transformer is energized. In experiment using a 3 kV transformer, actual inrush currents were greatly suppressed.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124463209","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5357021
K. Lee, J. Duart, R. Cheng, P. Shieh
The purpose of this paper is to provide an update on recent developments of fluid-filled distribution transformers that combine advanced materials like amorphous core, high temperature solid insulation, and alternative fluids with improved environmental impact. An example of a transformer integrating those materials will be described. Aging studies to understand relative behavior of a particular high temperature solid insulating material in various alternative fluids have been conducted to understand influence of parameters like air or temperature. Tensile properties have been measured on aged samples to understand compatibility between solid insulation and fluids.
{"title":"Advanced materials application in fluid-filled transformer","authors":"K. Lee, J. Duart, R. Cheng, P. Shieh","doi":"10.1109/TD-ASIA.2009.5357021","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5357021","url":null,"abstract":"The purpose of this paper is to provide an update on recent developments of fluid-filled distribution transformers that combine advanced materials like amorphous core, high temperature solid insulation, and alternative fluids with improved environmental impact. An example of a transformer integrating those materials will be described. Aging studies to understand relative behavior of a particular high temperature solid insulating material in various alternative fluids have been conducted to understand influence of parameters like air or temperature. Tensile properties have been measured on aged samples to understand compatibility between solid insulation and fluids.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127897440","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356951
C. Chu, Hung-Chi Tsai, Chunfang Liu, Yuan-Zheng Lin
Recent studies about Taiwan power system indicate that this system exhibited voltage stability problems under severe N-2 contingencies in heavily loaded hours. We will report feasibility studies of using STATCOM to mitigate this problem. The singular value decomposition method will be utilized to identify weakest buses for STATCOM placement. The required rating is determined by planning criteria. Three enhancement strategies will be investigated. The preference order of enhancement strategies are also discussed.
{"title":"Applications of STATCOMs for voltage security enhancements in Taiwan power system","authors":"C. Chu, Hung-Chi Tsai, Chunfang Liu, Yuan-Zheng Lin","doi":"10.1109/TD-ASIA.2009.5356951","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356951","url":null,"abstract":"Recent studies about Taiwan power system indicate that this system exhibited voltage stability problems under severe N-2 contingencies in heavily loaded hours. We will report feasibility studies of using STATCOM to mitigate this problem. The singular value decomposition method will be utilized to identify weakest buses for STATCOM placement. The required rating is determined by planning criteria. Three enhancement strategies will be investigated. The preference order of enhancement strategies are also discussed.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121058285","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 : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356889
Shouzhen Zhu, Lin Geng, Jinghong Zheng, Xiaoyu Wang, Daehee Choi, Yang Li
Recently, DG(Distributed Generation) is rapidly developed around the world. But there are several problems in the grid-connected operation. The paper focuses on the selection of proper transformers to meet the grounding requirements in the distribution networks. Through theory analysis and simulation, optimal selection methods are proposed. Yg/Δ-connection transformer is suitable for small resistance grounding distribution networks while Δ /Yg and Δ / Δ connection transformers are fit for small current neutral grounding networks. The conclusions are useful for the DG-connected power system.
{"title":"Selection method of transformer interconnecting distributed generation and distribution networks","authors":"Shouzhen Zhu, Lin Geng, Jinghong Zheng, Xiaoyu Wang, Daehee Choi, Yang Li","doi":"10.1109/TD-ASIA.2009.5356889","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356889","url":null,"abstract":"Recently, DG(Distributed Generation) is rapidly developed around the world. But there are several problems in the grid-connected operation. The paper focuses on the selection of proper transformers to meet the grounding requirements in the distribution networks. Through theory analysis and simulation, optimal selection methods are proposed. Yg/Δ-connection transformer is suitable for small resistance grounding distribution networks while Δ /Yg and Δ / Δ connection transformers are fit for small current neutral grounding networks. The conclusions are useful for the DG-connected power system.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121174778","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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