Pub Date : 2008-10-01DOI: 10.1109/ICPST.2008.4745323
J. Zhao, B. Zhang
The interaction and nonlinear relationship between different parameters or groups of parameters always are interested by the operators in control center of power grid. A practical tracing method of two parameter stability boundary for voltage stability assessment is proposed. In the traditional tracing method of two parameter bifurcation boundary a second order Hessian matrix of power flow equations has to be computed and factorized, which is a difficulty for on-line application of a large scale power system. By using the single parameter trajectory tracing and the bifurcation point seeking and identification alternately, with the computational expenses of some additional points, the proposed method handles the Jacobin matrix and overcomes this difficulty. The preposition of the proposed method is that the interested part of two parameter stability boundary is composed of both the saddle node bifurcation points and the limit induced bifurcation points, without double saddle node bifurcation points. It is satisfied since the interested part of the boundary is limited. The numerical results about a 3187 bus actual system show that the proposed method is very efficient for on-line application.
{"title":"A Practical Double-Parameter Steady Voltage Stability Boundary Tracing Method","authors":"J. Zhao, B. Zhang","doi":"10.1109/ICPST.2008.4745323","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745323","url":null,"abstract":"The interaction and nonlinear relationship between different parameters or groups of parameters always are interested by the operators in control center of power grid. A practical tracing method of two parameter stability boundary for voltage stability assessment is proposed. In the traditional tracing method of two parameter bifurcation boundary a second order Hessian matrix of power flow equations has to be computed and factorized, which is a difficulty for on-line application of a large scale power system. By using the single parameter trajectory tracing and the bifurcation point seeking and identification alternately, with the computational expenses of some additional points, the proposed method handles the Jacobin matrix and overcomes this difficulty. The preposition of the proposed method is that the interested part of two parameter stability boundary is composed of both the saddle node bifurcation points and the limit induced bifurcation points, without double saddle node bifurcation points. It is satisfied since the interested part of the boundary is limited. The numerical results about a 3187 bus actual system show that the proposed method is very efficient for on-line application.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122122304","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745212
S. Patil, A. K. Agarwala
A new boost dc-dc pulse width modulated (PWM) converter is proposed. The converter operates with zero voltage switching (ZVS), fixed frequency and continuous input current. The converter topology core has zero turn-on loss even when used with hard switching. An auxiliary switch clamps the voltage across the full bridge to zero prior to the switching off the bridge switches. The auxiliary switch operates for a small fraction of the period and turns on with zero current switching (ZCS) and turns off with ZVS. Direct duty cycle voltage mode control technique is implemented. The experimental results on the lab prototype verify the performance of converter and effectiveness of ZVS and voltage mode control techniques. In this paper the operation of the converter is explained and experimental results on a lab prototype are presented.
{"title":"A Zero Voltage Switched PWM Isolated Boost Converter with Voltage Mode Control","authors":"S. Patil, A. K. Agarwala","doi":"10.1109/ICPST.2008.4745212","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745212","url":null,"abstract":"A new boost dc-dc pulse width modulated (PWM) converter is proposed. The converter operates with zero voltage switching (ZVS), fixed frequency and continuous input current. The converter topology core has zero turn-on loss even when used with hard switching. An auxiliary switch clamps the voltage across the full bridge to zero prior to the switching off the bridge switches. The auxiliary switch operates for a small fraction of the period and turns on with zero current switching (ZCS) and turns off with ZVS. Direct duty cycle voltage mode control technique is implemented. The experimental results on the lab prototype verify the performance of converter and effectiveness of ZVS and voltage mode control techniques. In this paper the operation of the converter is explained and experimental results on a lab prototype are presented.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125606513","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745337
S. Xavier, P. Venkatesh, M. Saravanan
To study and analyze the dynamic performance of the flexible AC transmission system (FACTS) devices, modelling of the FACTS devices is needed. Reactive power compensation is an important issue in the control of electric power systems. Reactive power increases the transmission system losses and reduces the power transmission capability of the transmission lines. Moreover, reactive power transmitted through the transmission lines can cause large amplitude variations in the receiving-end voltage. This paper illustrates the effect of static compensator (STATCOM) in power system on reactive power control by proper modelling of simple power system and voltage source converter based STATCOM (Static compensator) using Simulink and Simpower system toolboxes in MATLAB. The proposed control structure is also verified via state- of- the- art dSPACE software.
{"title":"Development of Intelligent Controllers for STATCOM","authors":"S. Xavier, P. Venkatesh, M. Saravanan","doi":"10.1109/ICPST.2008.4745337","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745337","url":null,"abstract":"To study and analyze the dynamic performance of the flexible AC transmission system (FACTS) devices, modelling of the FACTS devices is needed. Reactive power compensation is an important issue in the control of electric power systems. Reactive power increases the transmission system losses and reduces the power transmission capability of the transmission lines. Moreover, reactive power transmitted through the transmission lines can cause large amplitude variations in the receiving-end voltage. This paper illustrates the effect of static compensator (STATCOM) in power system on reactive power control by proper modelling of simple power system and voltage source converter based STATCOM (Static compensator) using Simulink and Simpower system toolboxes in MATLAB. The proposed control structure is also verified via state- of- the- art dSPACE software.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124884676","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745383
J. Kuffel, Z. Li, B. Freimark, T. Rao
Traditionally corona testing has been performed in laboratories by mounting a single phase mock-up of the conductor/hardware/insulator assembly at a given height above the ground and applying 110% of the rated line-to-ground operating voltage. If the test setup is shown to be free of corona by this test, then it is considered that the assembly will be free of corona under operating conditions. This method does not appear in any standards, but is used as a generally accepted test method. In spite of its general acceptance, this test method can give erroneous results. This is due to the fact that the inception of corona occurs at a given electric field gradient rather than a given absolute voltage. Under actual operating conditions, the electric field gradient at the conductor/hardware/insulator assembly is a function of phase spacing, the local geometry, and the applied 3-phase voltage. In order to correctly perform such a test in a laboratory, it is essential that the maximum gradients occurring on the conductors in the field be reproduced in the laboratory test. To address this shortcoming in test procedures, the IEEE PES Transmission and Distribution Committee's Lightning and insulator and corona and field effects working groups are engaged in the development of a guide for the performance of visual corona and RIV testing on insulator assemblies and line hardware.This paper describes the theoretical and experimental background upon which the technical development of the guide is based, and the application of the procedures in the guide as used in testing insulator assemblies and hardware for a new design 6-conductor bundle 765 kV transmission system.
{"title":"Technical Development of the IEEE Guide for Visual Corona Testing of Insulator Assemblies and Line Hardware and its Application in the Testing of 765-kV Transmission Line Insulator Assemblies","authors":"J. Kuffel, Z. Li, B. Freimark, T. Rao","doi":"10.1109/ICPST.2008.4745383","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745383","url":null,"abstract":"Traditionally corona testing has been performed in laboratories by mounting a single phase mock-up of the conductor/hardware/insulator assembly at a given height above the ground and applying 110% of the rated line-to-ground operating voltage. If the test setup is shown to be free of corona by this test, then it is considered that the assembly will be free of corona under operating conditions. This method does not appear in any standards, but is used as a generally accepted test method. In spite of its general acceptance, this test method can give erroneous results. This is due to the fact that the inception of corona occurs at a given electric field gradient rather than a given absolute voltage. Under actual operating conditions, the electric field gradient at the conductor/hardware/insulator assembly is a function of phase spacing, the local geometry, and the applied 3-phase voltage. In order to correctly perform such a test in a laboratory, it is essential that the maximum gradients occurring on the conductors in the field be reproduced in the laboratory test. To address this shortcoming in test procedures, the IEEE PES Transmission and Distribution Committee's Lightning and insulator and corona and field effects working groups are engaged in the development of a guide for the performance of visual corona and RIV testing on insulator assemblies and line hardware.This paper describes the theoretical and experimental background upon which the technical development of the guide is based, and the application of the procedures in the guide as used in testing insulator assemblies and hardware for a new design 6-conductor bundle 765 kV transmission system.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124997293","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745171
V. Lescale, A. Kumar, L. Juhlin, H. Bjorklund, K. Nyberg
The paper gives an overview of the operations aspects of parallel operation of HVDC converters, especially in multi-terminal schemes where the converters are located in different locations. For UHVDC schemes, plusmn800 kV or even higher the geographic distances between the stations can be very significant. Considering the high power rating of UHVDC transmissions, the reliability and availability aspects are considered during all stages of development and design. Thus, the consequences of any outage have to be minimized. It is important that faulty equipment is quickly and safely isolated from the remaining transmission system. In a multi-terminal transmission system the telecommunication is important for coordination of current order and maneuvers in the different stations even if there are back-up controls for not losing the power transmission in case of telecommunication failures. The control and protection systems for a multi-terminal UHVDC transmission are conceptually described.
{"title":"Challenges with Multi-Terminal UHVDC Transmissions","authors":"V. Lescale, A. Kumar, L. Juhlin, H. Bjorklund, K. Nyberg","doi":"10.1109/ICPST.2008.4745171","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745171","url":null,"abstract":"The paper gives an overview of the operations aspects of parallel operation of HVDC converters, especially in multi-terminal schemes where the converters are located in different locations. For UHVDC schemes, plusmn800 kV or even higher the geographic distances between the stations can be very significant. Considering the high power rating of UHVDC transmissions, the reliability and availability aspects are considered during all stages of development and design. Thus, the consequences of any outage have to be minimized. It is important that faulty equipment is quickly and safely isolated from the remaining transmission system. In a multi-terminal transmission system the telecommunication is important for coordination of current order and maneuvers in the different stations even if there are back-up controls for not losing the power transmission in case of telecommunication failures. The control and protection systems for a multi-terminal UHVDC transmission are conceptually described.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132546142","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745211
T. Minakawa, Y. Tada, G. Wu
This paper describes the concept, philosophy and methods required for improvement of asset management under conditions of competitive electric energy supply, and presents state-of-the-art of highly integrated planning, operations and management systems. This paper suggests a framework to clarify the interactions among various economic and engineering issues in terms of practical master database. Blackouts caused by human error require compensation. Employee education and training is important for enhancement of intelligent assets. Practical measures are also presented to deal with these issues.
{"title":"Concept and Requirements of Asset Management System fro Competitive Electric Utility Under Deregulation","authors":"T. Minakawa, Y. Tada, G. Wu","doi":"10.1109/ICPST.2008.4745211","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745211","url":null,"abstract":"This paper describes the concept, philosophy and methods required for improvement of asset management under conditions of competitive electric energy supply, and presents state-of-the-art of highly integrated planning, operations and management systems. This paper suggests a framework to clarify the interactions among various economic and engineering issues in terms of practical master database. Blackouts caused by human error require compensation. Employee education and training is important for enhancement of intelligent assets. Practical measures are also presented to deal with these issues.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116334357","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745208
S. Balagopalan, S. Ashok, K. Mohandas
This paper presents a new set of methodologies and tools to implement multilateral trades in a restructured electricity market. Loss minimization is made an objective, realized through elasticized transmission charge. This charge is designed to acts as a financial instrument that penalizes deviation from least loss formulation. To reduce its impact coalition formation is envisaged in a cooperative game theory environment. Power vectors are derived to guide coalitions. Marginal vectors are used as socially stable pay-off vectors to share the charges. This model that exemplifies an electricity market is proposed as most suitable since all aspects are based on market engineering principles. A five bus power system is used to illustrate the suitability.
{"title":"Power Vector Coordination of Socially Stable Multilateral Trades","authors":"S. Balagopalan, S. Ashok, K. Mohandas","doi":"10.1109/ICPST.2008.4745208","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745208","url":null,"abstract":"This paper presents a new set of methodologies and tools to implement multilateral trades in a restructured electricity market. Loss minimization is made an objective, realized through elasticized transmission charge. This charge is designed to acts as a financial instrument that penalizes deviation from least loss formulation. To reduce its impact coalition formation is envisaged in a cooperative game theory environment. Power vectors are derived to guide coalitions. Marginal vectors are used as socially stable pay-off vectors to share the charges. This model that exemplifies an electricity market is proposed as most suitable since all aspects are based on market engineering principles. A five bus power system is used to illustrate the suitability.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123462215","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745260
Z. Bo, A. Klimek, Y.L. Ren, J.H. He
This paper presents the design of new real time digital simulator (RTDS) based novel relay test systems. The background of the developments in protection relays and their associated technologies, such as optical transducers and IEC 61850, are introduced. The new developments in RTDS systems are described. It is shown that the recent developments in transducers and communication technology will have great impacts to the developments of protection relays and their associated RTDS based relay test systems. The paper further describes the existing, new developments and future trend in the development of protection relays and their associated RTDS systems.
{"title":"A Real Time Digital Simulation System for Testing of Integrated Protection Schemes","authors":"Z. Bo, A. Klimek, Y.L. Ren, J.H. He","doi":"10.1109/ICPST.2008.4745260","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745260","url":null,"abstract":"This paper presents the design of new real time digital simulator (RTDS) based novel relay test systems. The background of the developments in protection relays and their associated technologies, such as optical transducers and IEC 61850, are introduced. The new developments in RTDS systems are described. It is shown that the recent developments in transducers and communication technology will have great impacts to the developments of protection relays and their associated RTDS based relay test systems. The paper further describes the existing, new developments and future trend in the development of protection relays and their associated RTDS systems.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"82 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120922122","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745267
J. Raju, P. S. Venkataramu
This paper investigates the effect of unified power flow controller (UPFC) on voltage stability margin in a real power system. The original load flow Jacobian is modified incorporating the static model of an UPFC and the minimum singular values (MSV) of this Jacobian matrix are computed and compared with that of MSVs of a non-UPFC system. The results of the case study carried out on a 22 bus, 400 kV South Indian real system is presented.
{"title":"Effect of UPFC on Voltage Stability Margin","authors":"J. Raju, P. S. Venkataramu","doi":"10.1109/ICPST.2008.4745267","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745267","url":null,"abstract":"This paper investigates the effect of unified power flow controller (UPFC) on voltage stability margin in a real power system. The original load flow Jacobian is modified incorporating the static model of an UPFC and the minimum singular values (MSV) of this Jacobian matrix are computed and compared with that of MSVs of a non-UPFC system. The results of the case study carried out on a 22 bus, 400 kV South Indian real system is presented.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128372535","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 : 2008-10-01DOI: 10.1109/ICPST.2008.4745150
C. Indulkar
Distributed power generation provides electric power at a site closer to customers. This paper, formulates the problem of optimal utilization of renewable energy options to meet the peak load demand. A Monte Carlo apportioning technique of solar photovoltaic, co-generation, wind power, and small hydro, which considers specific techno-economic constraints, such as capital cost and generation cost constraints, and carbon dioxide emission factors, is described. The proposed method in a single study provides the proportion of the renewable energy sources for maximum generating capacity or lowest generation cost subject to lowest emission or to lowest capital cost.
{"title":"Monte Carlo Planning Technique for Renewable Energy Sources","authors":"C. Indulkar","doi":"10.1109/ICPST.2008.4745150","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745150","url":null,"abstract":"Distributed power generation provides electric power at a site closer to customers. This paper, formulates the problem of optimal utilization of renewable energy options to meet the peak load demand. A Monte Carlo apportioning technique of solar photovoltaic, co-generation, wind power, and small hydro, which considers specific techno-economic constraints, such as capital cost and generation cost constraints, and carbon dioxide emission factors, is described. The proposed method in a single study provides the proportion of the renewable energy sources for maximum generating capacity or lowest generation cost subject to lowest emission or to lowest capital cost.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129472065","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：