This paper examines the impact of a thyristor controlled series capacitor (TCSC) on power system reliability. In this application, the TCSC is employed to adjust the natural power sharing of two different parallel transmission lines and, therefore, enable the maximum transmission capacity to be utilized. The improvement is measured using the two reliability risk indices of loss of load expectation (LOLE) and loss of energy expectation (LOEE).
{"title":"Impact of thyristor controlled series capacitor on power system reliability","authors":"S. Faried, R. Billinton, M. Fotuhi‐Firuzabad","doi":"10.1109/PTC.1999.826582","DOIUrl":"https://doi.org/10.1109/PTC.1999.826582","url":null,"abstract":"This paper examines the impact of a thyristor controlled series capacitor (TCSC) on power system reliability. In this application, the TCSC is employed to adjust the natural power sharing of two different parallel transmission lines and, therefore, enable the maximum transmission capacity to be utilized. The improvement is measured using the two reliability risk indices of loss of load expectation (LOLE) and loss of energy expectation (LOEE).","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128654791","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}
Summary form only given. This paper presents the adjustable speed hydro (ASH) machine concept as an alternative for obtaining better utilisation of power networks. Transmission lines appearing as bottlenecks with respect to power demand may increase their transfer capacity as ASH machines are introduced in the network. This is achieved by a quick and precise regulation of rotor currents and thereby active and reactive power out of the machine. During faults in the network, these properties map be utilised to maintain near constant power production and torque equilibrium. This in turn gives less speed deviation and better ability to control the network behaviour. Hence, the ASH machine can give a considerable contribution to the network both during and after serious conditions in the power system.
{"title":"Assessing the benefits of adjustable speed hydro machines","authors":"T. Gjengedal, J. Gjerde, R. Sporild","doi":"10.1109/PTC.1999.826536","DOIUrl":"https://doi.org/10.1109/PTC.1999.826536","url":null,"abstract":"Summary form only given. This paper presents the adjustable speed hydro (ASH) machine concept as an alternative for obtaining better utilisation of power networks. Transmission lines appearing as bottlenecks with respect to power demand may increase their transfer capacity as ASH machines are introduced in the network. This is achieved by a quick and precise regulation of rotor currents and thereby active and reactive power out of the machine. During faults in the network, these properties map be utilised to maintain near constant power production and torque equilibrium. This in turn gives less speed deviation and better ability to control the network behaviour. Hence, the ASH machine can give a considerable contribution to the network both during and after serious conditions in the power system.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129243540","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}
Voltage magnitude of a distribution system is usually controlled using an on-load tap changer transformer with AVC relay. However, the trend of integrating embedded generation such as wind farms into distribution networks makes it difficult for the AVC relay to maintain voltage magnitude within the statutory limits, particularly if the generator is connected at a long distance from the substation where the relay is located. This paper investigates the use of reactive power injected by a capacitor as a means for assisting the AVC relay for maintaining network voltage magnitude within the required limits. The paper also investigates the effect of the location of such a capacitor on the network voltage profile and network losses.
{"title":"Impact of embedded wind farms on voltage control and losses of distribution networks","authors":"S. Salman, F. Jiang","doi":"10.1109/PTC.1999.826474","DOIUrl":"https://doi.org/10.1109/PTC.1999.826474","url":null,"abstract":"Voltage magnitude of a distribution system is usually controlled using an on-load tap changer transformer with AVC relay. However, the trend of integrating embedded generation such as wind farms into distribution networks makes it difficult for the AVC relay to maintain voltage magnitude within the statutory limits, particularly if the generator is connected at a long distance from the substation where the relay is located. This paper investigates the use of reactive power injected by a capacitor as a means for assisting the AVC relay for maintaining network voltage magnitude within the required limits. The paper also investigates the effect of the location of such a capacitor on the network voltage profile and network losses.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130604694","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}
With an actual thyristor controlled series capacitor (TCSC) in Northeast China's Yi-Feng 500 kV UHV transmission system as engineering background, this paper deals with the realization of such a compensation device in a dynamic simulation laboratory. Emphasis is laid on the TCSC controllers. Based on response time and different requirements of the power system, TCSC controllers are divided into three parts-bottom control for mitigating synchronous resonance (SSR), middle control for adjusting power flow and upper control for enhancing power system transient stability. The dynamic simulation results show that they work in a coordinated fashion. Finally, the ANN-based /spl alpha/-th order inverse system controller, used in upper control, is introduced and studied by dynamic simulation for the first time to enhance transient stability. Simulation results show that this new controller has much better operating features than conventional ones, such as of PID controllers, etc.
{"title":"Dynamic simulator of thyristor controlled series capacitor in a UHV transmission system","authors":"Y. Tang, H.F. Wang, A. Johns, H. Chen, N.H. Li","doi":"10.1109/PTC.1999.826697","DOIUrl":"https://doi.org/10.1109/PTC.1999.826697","url":null,"abstract":"With an actual thyristor controlled series capacitor (TCSC) in Northeast China's Yi-Feng 500 kV UHV transmission system as engineering background, this paper deals with the realization of such a compensation device in a dynamic simulation laboratory. Emphasis is laid on the TCSC controllers. Based on response time and different requirements of the power system, TCSC controllers are divided into three parts-bottom control for mitigating synchronous resonance (SSR), middle control for adjusting power flow and upper control for enhancing power system transient stability. The dynamic simulation results show that they work in a coordinated fashion. Finally, the ANN-based /spl alpha/-th order inverse system controller, used in upper control, is introduced and studied by dynamic simulation for the first time to enhance transient stability. Simulation results show that this new controller has much better operating features than conventional ones, such as of PID controllers, etc.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125564184","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}
Approaches to developing a virtual environment for design and study of complex electromagnetic systems are presented. Development results of decision making methods, mathematical simulation of electric machines and devices, and numerical methods of nonlinear electromagnetic field problem solving are reflected in this paper.
{"title":"Virtual Design Studio: new approach to computer aided design of power electromagnetic devices","authors":"H. Terzyan, A. Mkrtchyan","doi":"10.1109/PTC.1999.826520","DOIUrl":"https://doi.org/10.1109/PTC.1999.826520","url":null,"abstract":"Approaches to developing a virtual environment for design and study of complex electromagnetic systems are presented. Development results of decision making methods, mathematical simulation of electric machines and devices, and numerical methods of nonlinear electromagnetic field problem solving are reflected in this paper.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125758597","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}
H. Knudsen, L.-O. Ellus, M. Koskinen, M. Luther, G. Schroder
The Baltic Ring Study was performed as a European Union TEN project in the period 1996-1998. 18 power companies and electric utility organizations from 11 countries around the Baltic Sea which are members of three nonsynchronously interconnected power system organizations investigated the possibilities of creating a common electricity market in the Baltic sea Region, emphasizing the need for environmental improvements and benefits for the customer.
{"title":"The Baltic Ring Study-transmission system simulations in the Baltic Sea region","authors":"H. Knudsen, L.-O. Ellus, M. Koskinen, M. Luther, G. Schroder","doi":"10.1109/PTC.1999.826437","DOIUrl":"https://doi.org/10.1109/PTC.1999.826437","url":null,"abstract":"The Baltic Ring Study was performed as a European Union TEN project in the period 1996-1998. 18 power companies and electric utility organizations from 11 countries around the Baltic Sea which are members of three nonsynchronously interconnected power system organizations investigated the possibilities of creating a common electricity market in the Baltic sea Region, emphasizing the need for environmental improvements and benefits for the customer.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126396299","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}
This paper presents the application of a rule-based expert system to the service restoration of distribution networks. The principal objective of the developed restoration plan is to minimize the number of switching operations without violating loading constraints in all elements of the network while retaining its open loop structure. The obtained results are encouraging.
{"title":"A rule-based expert system for distribution system service restoration","authors":"H. Talaat, S. El-Safty, M. Mansour, S. El-Debeiky","doi":"10.1109/PTC.1999.826616","DOIUrl":"https://doi.org/10.1109/PTC.1999.826616","url":null,"abstract":"This paper presents the application of a rule-based expert system to the service restoration of distribution networks. The principal objective of the developed restoration plan is to minimize the number of switching operations without violating loading constraints in all elements of the network while retaining its open loop structure. The obtained results are encouraging.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126859451","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}
This paper presents the analysis of the interaction between the damping and other control functions of a unified power flow controller (UPFC) installed in power systems. A case of negative interaction between the UPFC damping control and voltage control of the DC link capacitor is studied and then an algorithm for their co-ordinated design is suggested. An example is given in the paper to demonstrate the analytical results and the success of the co-ordinated design.
{"title":"Effect of multi-functional UPFC upon power system oscillation stability","authors":"H.F. Wang","doi":"10.1109/PTC.1999.826593","DOIUrl":"https://doi.org/10.1109/PTC.1999.826593","url":null,"abstract":"This paper presents the analysis of the interaction between the damping and other control functions of a unified power flow controller (UPFC) installed in power systems. A case of negative interaction between the UPFC damping control and voltage control of the DC link capacitor is studied and then an algorithm for their co-ordinated design is suggested. An example is given in the paper to demonstrate the analytical results and the success of the co-ordinated design.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127256067","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}
In this paper a methodology is presented for load management in industries, which are convenient for rescheduling of technological processes and inconvenient for load shedding or interruption. The proposed methodology determines an optimal scheduling (rescheduling) of individual technological processes with the aim of reducing system peak load. This methodology takes into consideration all technological and/or economical constraints (demands). The presented methodology is based on mixed integer programming and applied to system peak load reduction of Elektrovojvodina.
{"title":"A methodology for reducing system peak load through load management in industries","authors":"Z. Popovic","doi":"10.1109/PTC.1999.826625","DOIUrl":"https://doi.org/10.1109/PTC.1999.826625","url":null,"abstract":"In this paper a methodology is presented for load management in industries, which are convenient for rescheduling of technological processes and inconvenient for load shedding or interruption. The proposed methodology determines an optimal scheduling (rescheduling) of individual technological processes with the aim of reducing system peak load. This methodology takes into consideration all technological and/or economical constraints (demands). The presented methodology is based on mixed integer programming and applied to system peak load reduction of Elektrovojvodina.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126660202","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}
The efficient control of power systems requires the up-to-date industrial supervisory control and data acquisition (SCADA) standards and the latest artificial intelligence (AI) functions as well. The paper introduces the automatic event- and alarm recogniser and switching sequence generator functions and their embedding procedures into an existing SCADA system.
{"title":"Extension of the standard SCADA functionality with AI tools","authors":"P. Kadar, K. Attila, M. Andras, S. Ervin","doi":"10.1109/PTC.1999.826458","DOIUrl":"https://doi.org/10.1109/PTC.1999.826458","url":null,"abstract":"The efficient control of power systems requires the up-to-date industrial supervisory control and data acquisition (SCADA) standards and the latest artificial intelligence (AI) functions as well. The paper introduces the automatic event- and alarm recogniser and switching sequence generator functions and their embedding procedures into an existing SCADA system.","PeriodicalId":101688,"journal":{"name":"PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114505886","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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