Pub Date : 2009-12-18DOI: 10.1109/TD-ASIA.2009.5356876
Pan Feng, Zong Ming, Zhou Min
Distribution generation (DG) in distribution network will bring about sunk cost due to lower utilization efficiency of existing power supply equipment, which is not paid enough attention. In this paper, a DG planning method considering marginal distribution capacity cost (MDCC) is proposed in order to improve utilization efficiency of supply capacity and promote optimal allocation of power resources. Influence of DG as reinforcement alternative on MDCC is considered, and the calculation method of MDCC is proposed to reflect the charges and utilization efficiency of nodal capacity. On this basis, heuristic algorithm to lower MDCC is used to determine the site and capacity of DG. Furthermore, influence of DG on network loss and short circuit current are also considered. Finally, the results of an actual case about a 35/10kV distribution system show the rightness and validity of the proposed method.
{"title":"Planning of distributed generation considering marginal capacity cost","authors":"Pan Feng, Zong Ming, Zhou Min","doi":"10.1109/TD-ASIA.2009.5356876","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356876","url":null,"abstract":"Distribution generation (DG) in distribution network will bring about sunk cost due to lower utilization efficiency of existing power supply equipment, which is not paid enough attention. In this paper, a DG planning method considering marginal distribution capacity cost (MDCC) is proposed in order to improve utilization efficiency of supply capacity and promote optimal allocation of power resources. Influence of DG as reinforcement alternative on MDCC is considered, and the calculation method of MDCC is proposed to reflect the charges and utilization efficiency of nodal capacity. On this basis, heuristic algorithm to lower MDCC is used to determine the site and capacity of DG. Furthermore, influence of DG on network loss and short circuit current are also considered. Finally, the results of an actual case about a 35/10kV distribution system show the rightness and validity of the proposed method.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"35 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":"116515292","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.2009.5356878
N. Hasegawa, K. Fujimoto, T. Matsuyama, T. Ichikawa, K. Yukita, Y. Goto, K. Ichiyanagi
This paper describes the flywheel storage system uses for the smoothing of power variation of photovoltaic generation. Since it is dependent taking the power generation energy as energy of the sun, the power variation of photovoltaic generation is very big. Therefore, frequency variation and voltage variation, when the photovoltaic generation linked the power system. And, there is a problem of the degradation of the electric power quality. In this paper, the solution of these problems was proven using photovoltaic generation, small FW and EDLC.
{"title":"Suppression of power variation for PV using flywheel and EDLC","authors":"N. Hasegawa, K. Fujimoto, T. Matsuyama, T. Ichikawa, K. Yukita, Y. Goto, K. Ichiyanagi","doi":"10.1109/TD-ASIA.2009.5356878","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356878","url":null,"abstract":"This paper describes the flywheel storage system uses for the smoothing of power variation of photovoltaic generation. Since it is dependent taking the power generation energy as energy of the sun, the power variation of photovoltaic generation is very big. Therefore, frequency variation and voltage variation, when the photovoltaic generation linked the power system. And, there is a problem of the degradation of the electric power quality. In this paper, the solution of these problems was proven using photovoltaic generation, small FW and EDLC.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"176 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":"134266043","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.2009.5356909
Zang Shuai, Joon-Ho Choi, H. Nam
This paper represents the developments of the PSCAD/EMTDC based JEJU AC power systems and HVDC equivalent modeling. First, the background of the development and its associated technologies, such as PSCAD/EMTDC based generator, exciter and governor modeling are introduced. And then after the modeling has been established, the transient analysis and fault analysis have been done by using PSCAD in order to confirm the system's stability. Furthermore, with the sudden load change studies, this modeling can be concerned as a base-modeling for connecting JeJu wind power generation into the JEJU AC power system in the further.
{"title":"Simulation studies of JeJu AC power system modeling by using PSCAD/EMTDC","authors":"Zang Shuai, Joon-Ho Choi, H. Nam","doi":"10.1109/TD-ASIA.2009.5356909","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356909","url":null,"abstract":"This paper represents the developments of the PSCAD/EMTDC based JEJU AC power systems and HVDC equivalent modeling. First, the background of the development and its associated technologies, such as PSCAD/EMTDC based generator, exciter and governor modeling are introduced. And then after the modeling has been established, the transient analysis and fault analysis have been done by using PSCAD in order to confirm the system's stability. Furthermore, with the sudden load change studies, this modeling can be concerned as a base-modeling for connecting JeJu wind power generation into the JEJU AC power system in the further.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"45 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":"133011291","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.2009.5356925
Hui Liu, Youzhong Miao
This paper extends the basic theory of spot price to incorporate power system security issues and presents a price decomposition method based on Optimal Power Flow (OPF), which can supply security prices corresponding to different security constraints. Transient stability and static voltage stability restrictions respectively expressed as Practical Dynamic Security Region (PDSR) and Static Voltage Stability Region (SVSR) are considered as constraints in OPF model which takes tree branch angles as optimal variables instead of power injections used in the traditional OPF. According to optimality conditions of OPF and Moore-Penrose generalized inverse matrix, the security prices are determined by spot price decomposition, which can stimulate all of the participants to take an active part in maintaining the system security. A case study on the New England 10-genetator 39-bus System is presented to demonstrate the proposed method.
{"title":"A novel OPF-based security pricing method with considering effects of transient stability and static voltage stability","authors":"Hui Liu, Youzhong Miao","doi":"10.1109/TD-ASIA.2009.5356925","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356925","url":null,"abstract":"This paper extends the basic theory of spot price to incorporate power system security issues and presents a price decomposition method based on Optimal Power Flow (OPF), which can supply security prices corresponding to different security constraints. Transient stability and static voltage stability restrictions respectively expressed as Practical Dynamic Security Region (PDSR) and Static Voltage Stability Region (SVSR) are considered as constraints in OPF model which takes tree branch angles as optimal variables instead of power injections used in the traditional OPF. According to optimality conditions of OPF and Moore-Penrose generalized inverse matrix, the security prices are determined by spot price decomposition, which can stimulate all of the participants to take an active part in maintaining the system security. A case study on the New England 10-genetator 39-bus System is presented to demonstrate the proposed method.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"51 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":"133164222","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.2009.5356832
G. Lambert-Torres, H. G. Martins, L. D. da Silva, M. Coutinho, J. C. Neto
This paper presents a new approach based on a connection of two techniques applied in Artificial Intelligence to solve problems of restoration of electrical power substations. The techniques are: the Four-valued Annotated Paraconsistent Logic — 4vAPL and the Case-based Reasoning — CBR. This linking process happens in the manipulation of the functions of belief, disbelief, expertise and temporality of the 4vAPL for the recovery of cases to determine process diagnostics of a CBR. The 4vAPL is the support applied to the problems that present inconsistent, partial, undefined information. The domain of CBR is applied in the restoration of an electrical power substation. Thus, it approaches the system under study to real situations.
{"title":"New technology applied to a restoration of electrical power substation","authors":"G. Lambert-Torres, H. G. Martins, L. D. da Silva, M. Coutinho, J. C. Neto","doi":"10.1109/TD-ASIA.2009.5356832","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356832","url":null,"abstract":"This paper presents a new approach based on a connection of two techniques applied in Artificial Intelligence to solve problems of restoration of electrical power substations. The techniques are: the Four-valued Annotated Paraconsistent Logic — 4vAPL and the Case-based Reasoning — CBR. This linking process happens in the manipulation of the functions of belief, disbelief, expertise and temporality of the 4vAPL for the recovery of cases to determine process diagnostics of a CBR. The 4vAPL is the support applied to the problems that present inconsistent, partial, undefined information. The domain of CBR is applied in the restoration of an electrical power substation. Thus, it approaches the system under study to real situations.","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":"130584960","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.2009.5356992
Kyung-il Min, Suwon Lee, Hongrae Kim, Y. Moon
This paper represents a calculation method of stochastic generation cost (SGQ taking into consideration the wind power generation expressed as random variables, and shows its necessity. As wind power generation is stochastically predictable, a system demand should be expressed to a random variable with its own probability density function (PDF) instead of a constant value in unit commitment (UQ and economic dispatch (ED) problems, etc. Assuming that the produced wind power generation is fully consumed in power systems, total generation distributed to thermal generators, which becomes a modified system load, is equal to the difference between total system demand and total wind power generation. Given that the total wind generation is based on normal distribution, the modified system load should be also based on normal distribution. The proposed method is applied to illustrative examples and simple UC problems.
{"title":"Calculation of stochastic generation costs considering wind power generation","authors":"Kyung-il Min, Suwon Lee, Hongrae Kim, Y. Moon","doi":"10.1109/TD-ASIA.2009.5356992","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356992","url":null,"abstract":"This paper represents a calculation method of stochastic generation cost (SGQ taking into consideration the wind power generation expressed as random variables, and shows its necessity. As wind power generation is stochastically predictable, a system demand should be expressed to a random variable with its own probability density function (PDF) instead of a constant value in unit commitment (UQ and economic dispatch (ED) problems, etc. Assuming that the produced wind power generation is fully consumed in power systems, total generation distributed to thermal generators, which becomes a modified system load, is equal to the difference between total system demand and total wind power generation. Given that the total wind generation is based on normal distribution, the modified system load should be also based on normal distribution. The proposed method is applied to illustrative examples and simple UC problems.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"10 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":"123960715","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.2009.5356884
Feng Kaihui, Liu Guopin, Ma Shiying, Zeng Xiangjun, Tao Jin, Qin Xiao'an
With wind farms expansion, the wind generations have large influence on power grids. Taking wind farms connecting to the grids as an object of study, this paper set up dynamic mathematical models of asynchronous wind power system, including wind speed, wind turbine, transmission mechanism and asynchronous generator. And set up the dynamic simulation model of asynchronous wind power using Power System Analysis Software Package (PSASP) according to an actual grid connected wind farm. For various operation status of the grid connected wind farm, simulations are carried out. The simulation results verify the correctness of the programs.
{"title":"Dynamic simulation for wind farms connecting to power grids using PSASP","authors":"Feng Kaihui, Liu Guopin, Ma Shiying, Zeng Xiangjun, Tao Jin, Qin Xiao'an","doi":"10.1109/TD-ASIA.2009.5356884","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356884","url":null,"abstract":"With wind farms expansion, the wind generations have large influence on power grids. Taking wind farms connecting to the grids as an object of study, this paper set up dynamic mathematical models of asynchronous wind power system, including wind speed, wind turbine, transmission mechanism and asynchronous generator. And set up the dynamic simulation model of asynchronous wind power using Power System Analysis Software Package (PSASP) according to an actual grid connected wind farm. For various operation status of the grid connected wind farm, simulations are carried out. The simulation results verify the correctness of the programs.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"37 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":"127927759","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.2009.5357001
M. Ahmed, W. L. Soo
This paper presents a customized SCADA at customer side distribution automation system (DAS) for operating and controlling low voltage (LV) down stream of 415/240V by using the Tenaga Nasional Berhad (TNB) distribution system. An embedded Ethernet controller is used as RTU to act as converter for HMI to interact with digital input and output modules. RTU is the master and digital input and output modules are the slaves. RTU will initiate the transaction with the digital input and output modules. Proprietary software is used to develop algorithm for the controller and to develop HMI for monitoring and controlling functions for the operator. The SCADA system software includes software modules such as graphic editor, database setup, alarm configuration, trending tools and communication setup. HMI monitoring system is correctly showing the fault point and generates the correct alarm messages for the operator to be acknowledged. The SCADA system developed provides automatic fault isolation, monitoring and controlling functions for the operators and data collection for future analysis.
本文介绍了一种客户端配电自动化系统(DAS)的定制SCADA，用于使用Tenaga Nasional Berhad (TNB)配电系统对415/240V下游低压(LV)进行操作和控制。采用嵌入式以太网控制器作为RTU，作为人机界面与数字输入输出模块交互的转换器。RTU是主模块，数字输入和输出模块是从模块。RTU将启动与数字输入和输出模块的事务。使用专有软件为控制器开发算法，并为操作员开发监视和控制功能的HMI。SCADA系统软件包括图形编辑器、数据库设置、报警配置、趋势工具和通信设置等软件模块。HMI监控系统正确显示故障点，并产生正确的报警信息供操作人员确认。开发的SCADA系统为操作人员提供自动故障隔离、监测和控制功能，并为未来分析提供数据收集。
{"title":"Customized SCADA system for low voltage distribution automation system","authors":"M. Ahmed, W. L. Soo","doi":"10.1109/TD-ASIA.2009.5357001","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5357001","url":null,"abstract":"This paper presents a customized SCADA at customer side distribution automation system (DAS) for operating and controlling low voltage (LV) down stream of 415/240V by using the Tenaga Nasional Berhad (TNB) distribution system. An embedded Ethernet controller is used as RTU to act as converter for HMI to interact with digital input and output modules. RTU is the master and digital input and output modules are the slaves. RTU will initiate the transaction with the digital input and output modules. Proprietary software is used to develop algorithm for the controller and to develop HMI for monitoring and controlling functions for the operator. The SCADA system software includes software modules such as graphic editor, database setup, alarm configuration, trending tools and communication setup. HMI monitoring system is correctly showing the fault point and generates the correct alarm messages for the operator to be acknowledged. The SCADA system developed provides automatic fault isolation, monitoring and controlling functions for the operators and data collection for future analysis.","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":"129742479","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.2009.5356911
P. Hwang, Seon-Ju Ahn, Y. Yoon, S. Moon, Seong-Il Hur
The Korean energy management system (K-EMS) development project, which includes the development of the dispatcher training simulator (DTS), has been underway since 2005. The DTS provides a realistic environment for system dispatchers to practice operating tasks and experience emergency operating situations. In order to provide a realistic environment, the DTS includes many dynamic models of power plants, such as fossil fuel plant and hydro plants. In this paper, the fossil fuel power plant model for the DTS in K-EMS is introduced and verified through actual measurement data.
{"title":"Fossil fuel plant modeling for the dispatcher training simulator of the K-EMS","authors":"P. Hwang, Seon-Ju Ahn, Y. Yoon, S. Moon, Seong-Il Hur","doi":"10.1109/TD-ASIA.2009.5356911","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356911","url":null,"abstract":"The Korean energy management system (K-EMS) development project, which includes the development of the dispatcher training simulator (DTS), has been underway since 2005. The DTS provides a realistic environment for system dispatchers to practice operating tasks and experience emergency operating situations. In order to provide a realistic environment, the DTS includes many dynamic models of power plants, such as fossil fuel plant and hydro plants. In this paper, the fossil fuel power plant model for the DTS in K-EMS is introduced and verified through actual measurement data.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"91 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":"122970935","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.2009.5356910
Dong Yang, Yutian Liu, Xinsheng Niu
Considering some reasonable and simplified hypothesis, this paper presents a short-circuit current model based on the circuit theory. Power receiving capability on the limitation of short-circuit current is analyzed according to this model. The example of Jinan power grid in China is computed to verify the applicability of this short-circuit current model. Simulation results indicate that electromagnetic loop opening, bus subsection in substation and high-impedance transformer usage, as feasible and effective means, can not only control short-circuit current level but also augment power receiving capability.
{"title":"Simplified short-circuit current model for power receiving capability analysis","authors":"Dong Yang, Yutian Liu, Xinsheng Niu","doi":"10.1109/TD-ASIA.2009.5356910","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356910","url":null,"abstract":"Considering some reasonable and simplified hypothesis, this paper presents a short-circuit current model based on the circuit theory. Power receiving capability on the limitation of short-circuit current is analyzed according to this model. The example of Jinan power grid in China is computed to verify the applicability of this short-circuit current model. Simulation results indicate that electromagnetic loop opening, bus subsection in substation and high-impedance transformer usage, as feasible and effective means, can not only control short-circuit current level but also augment power receiving capability.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"605 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":"123246354","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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