Pub Date : 2011-07-07DOI: 10.1109/ICPE.2011.5944598
J. Lee, B. Han, H. Cha
This paper describes operational analysis results of the DC micro-grid using detailed model of distributed generation. Detailed model of wind power generation, photo-voltaic generation, fuel cells generation was implemented with the user-defined model of PSCAD/EMTDC software that is coded with C-language. Various simulation results confirm that the DC micro-grid can operate without any problem in both the grid-tied mode and the islanded mode. The operational analysis result confirms that the DC micro-grid make it feasible to provide power to the load stably.
{"title":"Operational analysis of DC micro-grid using detailed model of distributed generation","authors":"J. Lee, B. Han, H. Cha","doi":"10.1109/ICPE.2011.5944598","DOIUrl":"https://doi.org/10.1109/ICPE.2011.5944598","url":null,"abstract":"This paper describes operational analysis results of the DC micro-grid using detailed model of distributed generation. Detailed model of wind power generation, photo-voltaic generation, fuel cells generation was implemented with the user-defined model of PSCAD/EMTDC software that is coded with C-language. Various simulation results confirm that the DC micro-grid can operate without any problem in both the grid-tied mode and the islanded mode. The operational analysis result confirms that the DC micro-grid make it feasible to provide power to the load stably.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121822831","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.2009.5356812
Jing Li, Hong Shen, HaiWei Li, Bin Huang
According to the large scale wind power construction plan of JiuQuan area Gansu Province China, there are two 750kV transmission lines with four transformer stations planned for sending wind power to load center, which is over 1000km, called Hexi transmission corridor. In the interest of improving the transmission capability, fixed series compensation(FSC) is adopted in Hexi corridor. The FSC scheme was analyzed from the aspects of locations, compensation degree, etc… Suggestions for the FSC scheme were provided finally.
{"title":"Investigation on the 750kV fixed series compensation scheme of Hexi wind power transmission corridor in northwest China grid","authors":"Jing Li, Hong Shen, HaiWei Li, Bin Huang","doi":"10.1109/TD-ASIA.2009.5356812","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356812","url":null,"abstract":"According to the large scale wind power construction plan of JiuQuan area Gansu Province China, there are two 750kV transmission lines with four transformer stations planned for sending wind power to load center, which is over 1000km, called Hexi transmission corridor. In the interest of improving the transmission capability, fixed series compensation(FSC) is adopted in Hexi corridor. The FSC scheme was analyzed from the aspects of locations, compensation degree, etc… Suggestions for the FSC scheme were provided finally.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"25 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":"115286445","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.2009.5356877
Jungchul Choi, Seon-Ju Ahn, Jin-Woo Park, S. Moon
As wind power penetrations increase in isolated power systems, the power from wind energy will start to replace conventional generation units and its influence on power systems cannot be neglected. On the other hand, wind farm with the centralized power control scheme can behave as an active controllable component in the power system according to power references from system operator. Nevertheless, there are normally large uncertainties in the prediction of wind power output because of the intermittent nature of wind. Therefore, additional up/down reserve on a system is needed to cater for any possible unexpected generation deficit. This leads the increase of operating cost of power system. This paper presents an algorithm for active power output limitation of wind farm considering system operating cost in the isolated power systems. The unit commitment formulation for the system with wind farms is presented. Then, the procedure to adjust the generation schedule using decommittment method is proposed. In order to validate the effectiveness of the proposed algorithm, some numerical experiments with 10 unit system are conducted.
{"title":"Active power limitation of wind farm to reduce system operating cost","authors":"Jungchul Choi, Seon-Ju Ahn, Jin-Woo Park, S. Moon","doi":"10.1109/TD-ASIA.2009.5356877","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356877","url":null,"abstract":"As wind power penetrations increase in isolated power systems, the power from wind energy will start to replace conventional generation units and its influence on power systems cannot be neglected. On the other hand, wind farm with the centralized power control scheme can behave as an active controllable component in the power system according to power references from system operator. Nevertheless, there are normally large uncertainties in the prediction of wind power output because of the intermittent nature of wind. Therefore, additional up/down reserve on a system is needed to cater for any possible unexpected generation deficit. This leads the increase of operating cost of power system. This paper presents an algorithm for active power output limitation of wind farm considering system operating cost in the isolated power systems. The unit commitment formulation for the system with wind farms is presented. Then, the procedure to adjust the generation schedule using decommittment method is proposed. In order to validate the effectiveness of the proposed algorithm, some numerical experiments with 10 unit system are conducted.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"19 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":"124867884","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.2009.5357016
Y. R. Hernandez, T. Hiyama
A multi-objective genetic algorithm, based on NSGA-II, is implemented to find an optimal condition of minimum voltage deviations, minimum power losses and minimum number of control actions of a transmission network system. The system used as model is a IEEE 14-bus system. Generators, tap position of transformers and a shunt capacitor are the devices to controlling. The results show a succesful performance of the implemented algorithm. Also, different probability of mutation factors are compared and it is proved that a more important mutation factor can improve the velocity of convergence without fall into a random searching.
{"title":"Application of NSGA-II for reducing voltage deviations, power losses and control actions in a transmission power system","authors":"Y. R. Hernandez, T. Hiyama","doi":"10.1109/TD-ASIA.2009.5357016","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5357016","url":null,"abstract":"A multi-objective genetic algorithm, based on NSGA-II, is implemented to find an optimal condition of minimum voltage deviations, minimum power losses and minimum number of control actions of a transmission network system. The system used as model is a IEEE 14-bus system. Generators, tap position of transformers and a shunt capacitor are the devices to controlling. The results show a succesful performance of the implemented algorithm. Also, different probability of mutation factors are compared and it is proved that a more important mutation factor can improve the velocity of convergence without fall into a random searching.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"28 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":"126122377","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.2009.5356971
Y. Serizawa, F. Fujikawa, W. Osawa, S. Kodama
This paper preliminarily examines the applicability of Internet protocol (IP)-related communication technologies such as IP and MPLS (Multi-Protocol Label Switching) routers and L2 (Layer-two or Ethernet) switches to existing teleprotection systems. The teleprotection systems concerned include microprocessor-based current differential teleprotection with data communications of instantaneous current values or phasors, directional comparison teleprotection, and special or system-wide protection. Taking account of the performance limitations of IP-related telecommunication networks, fully redundant L2 switch networks are indispensable, as is an external timing synchronization scheme for current differential teleprotection. Based on the analyses, a new concept for modernizing teleprotection system associated with L2 switch networks, time synchronization and modular devices is proposed.
{"title":"Examination on the applicability of IP-related communications to teleprotection systems","authors":"Y. Serizawa, F. Fujikawa, W. Osawa, S. Kodama","doi":"10.1109/TD-ASIA.2009.5356971","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356971","url":null,"abstract":"This paper preliminarily examines the applicability of Internet protocol (IP)-related communication technologies such as IP and MPLS (Multi-Protocol Label Switching) routers and L2 (Layer-two or Ethernet) switches to existing teleprotection systems. The teleprotection systems concerned include microprocessor-based current differential teleprotection with data communications of instantaneous current values or phasors, directional comparison teleprotection, and special or system-wide protection. Taking account of the performance limitations of IP-related telecommunication networks, fully redundant L2 switch networks are indispensable, as is an external timing synchronization scheme for current differential teleprotection. Based on the analyses, a new concept for modernizing teleprotection system associated with L2 switch networks, time synchronization and modular devices is proposed.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"116 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":"126134214","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.2009.5356896
P. Roy, S. Ghoshal, S. S. Thakur
This paper presents Biogeography-Based Optimization (BBO) technique for solving constrained economic dispatch problems in power system. Many nonlinear characteristics of generators, like valve point loading, ramp rate limits, prohibited zone, and multiple fuels cost functions are considered. Two Economic Load Dispatch (ELD) problems with different characteristics are applied and compared its solution quality and computation efficiency to Genetic algorithm (GA), Particle swarm optimization (PSO), and other optimization techniques. The simulation results show that the proposed algorithm outperforms previous optimization methods.
{"title":"Biogeography Based Optimization technique applied to multi-constraints economic load dispatch problems","authors":"P. Roy, S. Ghoshal, S. S. Thakur","doi":"10.1109/TD-ASIA.2009.5356896","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356896","url":null,"abstract":"This paper presents Biogeography-Based Optimization (BBO) technique for solving constrained economic dispatch problems in power system. Many nonlinear characteristics of generators, like valve point loading, ramp rate limits, prohibited zone, and multiple fuels cost functions are considered. Two Economic Load Dispatch (ELD) problems with different characteristics are applied and compared its solution quality and computation efficiency to Genetic algorithm (GA), Particle swarm optimization (PSO), and other optimization techniques. The simulation results show that the proposed algorithm outperforms previous optimization methods.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"15 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":"116073358","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.2009.5356837
H. Kakigano, Y. Miura, T. Ise
DC microgrid is suitable for dc output type distributed generations and energy storages. In this paper, dc microgrid for residential houses is described. Electrical power through dc distribution line (± 170 V) can be converted into some proper ac or dc voltages by converters placed near loads. Each house has a cogeneration system such as gas engine or fuel cell. The outputs of those distributed generations are connected to dc distribution line, and the power from generations can be shared among residences. We constructed a small scale experimental system in our laboratory, and examined the fundamental characteristics of dc microgrid. The experimental results demonstrated that high quality power was supplied even when voltage sag occurred in the utility grid.
{"title":"Configuration and control of a DC microgrid for residential houses","authors":"H. Kakigano, Y. Miura, T. Ise","doi":"10.1109/TD-ASIA.2009.5356837","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356837","url":null,"abstract":"DC microgrid is suitable for dc output type distributed generations and energy storages. In this paper, dc microgrid for residential houses is described. Electrical power through dc distribution line (± 170 V) can be converted into some proper ac or dc voltages by converters placed near loads. Each house has a cogeneration system such as gas engine or fuel cell. The outputs of those distributed generations are connected to dc distribution line, and the power from generations can be shared among residences. We constructed a small scale experimental system in our laboratory, and examined the fundamental characteristics of dc microgrid. The experimental results demonstrated that high quality power was supplied even when voltage sag occurred in the utility grid.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"7 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":"122390105","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.2009.5356936
Phatchakorn Areekul, T. Senjyu, H. Toyama, A. Yona
In the framework of competitive electricity markets, power producers and consumers need accurate price forecasting tools. Price forecasts embody crucial information for producers and consumers when planning bidding strategies in order to maximize their benefits and utilities, respectively. The choice of the forecasting model becomes the important influence factor how to improve price forecasting accuracy. In this paper provides a combination methodology that combines both ARIMA and ANN models for predicting short term electricity prices. This method is examined by using the data of Australian National Electricity Market (NEM), New South Wales regional in year 2006. Comparison of forecasting performance with the proposed ARIMA and ARIMA-ANN models are presented. Empirical results indicate that an ARIMA-ANN model can improve the price forecasting accuracy.
{"title":"Combination of artificial neural network and ARIMA time series models for short term price forecasting in deregulated market","authors":"Phatchakorn Areekul, T. Senjyu, H. Toyama, A. Yona","doi":"10.1109/TD-ASIA.2009.5356936","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356936","url":null,"abstract":"In the framework of competitive electricity markets, power producers and consumers need accurate price forecasting tools. Price forecasts embody crucial information for producers and consumers when planning bidding strategies in order to maximize their benefits and utilities, respectively. The choice of the forecasting model becomes the important influence factor how to improve price forecasting accuracy. In this paper provides a combination methodology that combines both ARIMA and ANN models for predicting short term electricity prices. This method is examined by using the data of Australian National Electricity Market (NEM), New South Wales regional in year 2006. Comparison of forecasting performance with the proposed ARIMA and ARIMA-ANN models are presented. Empirical results indicate that an ARIMA-ANN model can improve the price forecasting accuracy.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"25 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":"116717995","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.2009.5356855
N. Kinsht, N. Petrun’ko
Short circuits in the electric circuits can be modeled by various equivalents. In the article problem of change of the input impedance of the coil is considered at short circuit of one or several turns.
电路中的短路可以用各种等价物来模拟。本文研究了一匝或数匝短路时线圈输入阻抗的变化问题。
{"title":"On formalization the problem of diagnostics of electric circuits with magnetic connections","authors":"N. Kinsht, N. Petrun’ko","doi":"10.1109/TD-ASIA.2009.5356855","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356855","url":null,"abstract":"Short circuits in the electric circuits can be modeled by various equivalents. In the article problem of change of the input impedance of the coil is considered at short circuit of one or several turns.","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":"117106298","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.2009.5356843
N. Yu, Ji-Tae Kim, Yong-Seok Seon, Sangmin Yeo, Joon-Hong Jung
When merging new power IT(PIT) systems, it is necessary to evaluate operating condition in order to verify the efficiency of these systems. To do so, it is required to develop some test tool and test-bed system. In this paper, we propose a design methodology of this test tool. The test tool is concerned about PIT research results such as intelligent transmission system, power telemetrics, K-EMS(Korea-Energy Management System), digital substation system, intelligent distribution system, and value added service of power system.
{"title":"Power IT test-bed system for smart grid","authors":"N. Yu, Ji-Tae Kim, Yong-Seok Seon, Sangmin Yeo, Joon-Hong Jung","doi":"10.1109/TD-ASIA.2009.5356843","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356843","url":null,"abstract":"When merging new power IT(PIT) systems, it is necessary to evaluate operating condition in order to verify the efficiency of these systems. To do so, it is required to develop some test tool and test-bed system. In this paper, we propose a design methodology of this test tool. The test tool is concerned about PIT research results such as intelligent transmission system, power telemetrics, K-EMS(Korea-Energy Management System), digital substation system, intelligent distribution system, and value added service of power system.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"1 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":"129622145","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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