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":null,"pages":null},"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.2008.4745290
B. Murthy, P. Yemula, S. Khaparde
The transmission expansion planning (TEP) has long term effects on system performance. The effects are irreversible. The conventional optimization techniques have convergence problems for large system and heuristic methods reported so far are not holistic in nature. This paper proposes a two level approach. At first level, the usual static solution using linear approach is proposed. The objective is to minimize the cost along with overloads. The isolated nodes are handled by ZBUS formulation as described. The genetic algorithm (GA) is used as a heuristic approach to arrive at results. The plans are shortlisted with no overloads and least cost. The performance is tested for high rank contingencies and appropriate system strengthening is suggested. At second level, further strengthening of the network on short term basis is done with due consideration to reactive power balance in the grid. The reactive power support has to be incorporated since the AC model with reactive power limits can impose convergence problems. To overcome this, reactive power compensation (RPC) enhanced FDLF module with integrated reactive power planning based on set of heuristics is implemented. The TEP plans need to be evaluated for reactive power balance. This is accomplished by evaluating voltage stability margin index (VSMI). It identifies weaker lines prone to reactive power imbalance. The TEP plan reinforces grid to improve the weaker section. The proposed methodology is applied to IEEE 46-bus test system and results are discussed.
TEP (transmission expansion planning)对系统性能的影响是长期的。其影响是不可逆转的。传统的优化技术对于大系统存在收敛性问题，目前报道的启发式方法在本质上不是全局性的。本文提出了一个两层次的方法。首先，提出了常用的线性静态解。目标是最小化成本和过载。隔离节点按描述的ZBUS公式处理。遗传算法(GA)作为一种启发式方法来获得结果。入围的计划没有超载，成本最低。对高级别突发事件进行了性能测试，并提出了适当的系统强化建议。二是考虑电网无功平衡，短期内进一步加强电网。由于具有无功功率限制的交流模型可能会造成收敛问题，因此必须纳入无功功率支持。为解决这一问题，实现了无功补偿(RPC)增强FDLF模块，并基于一组启发式算法集成了无功规划。需要对TEP计划进行无功平衡评估。这是通过评估电压稳定裕度指数(VSMI)来实现的。它可以识别容易产生无功功率不平衡的较弱线路。TEP计划加强电网以改善较弱的部分。将该方法应用于IEEE 46总线测试系统，并对测试结果进行了讨论。
{"title":"A Comprehensive Two Level Heuristic Approach to Transmission Expansion Planning","authors":"B. Murthy, P. Yemula, S. Khaparde","doi":"10.1109/ICPST.2008.4745290","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745290","url":null,"abstract":"The transmission expansion planning (TEP) has long term effects on system performance. The effects are irreversible. The conventional optimization techniques have convergence problems for large system and heuristic methods reported so far are not holistic in nature. This paper proposes a two level approach. At first level, the usual static solution using linear approach is proposed. The objective is to minimize the cost along with overloads. The isolated nodes are handled by ZBUS formulation as described. The genetic algorithm (GA) is used as a heuristic approach to arrive at results. The plans are shortlisted with no overloads and least cost. The performance is tested for high rank contingencies and appropriate system strengthening is suggested. At second level, further strengthening of the network on short term basis is done with due consideration to reactive power balance in the grid. The reactive power support has to be incorporated since the AC model with reactive power limits can impose convergence problems. To overcome this, reactive power compensation (RPC) enhanced FDLF module with integrated reactive power planning based on set of heuristics is implemented. The TEP plans need to be evaluated for reactive power balance. This is accomplished by evaluating voltage stability margin index (VSMI). It identifies weaker lines prone to reactive power imbalance. The TEP plan reinforces grid to improve the weaker section. The proposed methodology is applied to IEEE 46-bus test system and results are discussed.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130903609","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.2008.4745387
Vishal Verma, Lovely Goyal, Bhim Singh
Distribution system has witnessed numerous problems due to concentrated power loading in cities. Stability, reliability, peak demand, poor power quality, unbalanced loading are some of the major issues besides handling of large AC networks. This paper proposes an insertion of DC power dam connected between transmission and distribution system, through bidirectional voltage source converter (VSC) both on transmission and distribution sides at multiple places, to provide the comprehensive solution to the problems of interconnected AC distribution network. A study has been done through MATLAB simulation and results are presented for solutions to problems witnessed by the distribution system. A new simplified current control technique is also presented for realization of simulation model of the system.
{"title":"Voltage Source Converter Based Multi Terminal DC Sub-transmission System for City Infeed","authors":"Vishal Verma, Lovely Goyal, Bhim Singh","doi":"10.1109/ICPST.2008.4745387","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745387","url":null,"abstract":"Distribution system has witnessed numerous problems due to concentrated power loading in cities. Stability, reliability, peak demand, poor power quality, unbalanced loading are some of the major issues besides handling of large AC networks. This paper proposes an insertion of DC power dam connected between transmission and distribution system, through bidirectional voltage source converter (VSC) both on transmission and distribution sides at multiple places, to provide the comprehensive solution to the problems of interconnected AC distribution network. A study has been done through MATLAB simulation and results are presented for solutions to problems witnessed by the distribution system. A new simplified current control technique is also presented for realization of simulation model of the system.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131139646","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.2008.4745228
Zha Kunpeng, Wen Jia-liang, Yang Xiaonan, Gao Chong, T. Guangfu
The paper mainly described the upgrade study of High Power Electronics Laboratory (HPEL) in China Electric Power Research Institute (CEPRI), which will meet all the test requirements of plusmn 800 kV UHVDC valves. Based on the valves electrical parameters of plusmn 800 kV UHVDC demonstration project in China, the paper studied the UHVDC valve type test technology, gave the valve test parameters, the main equipments topologies, rated parameters and the basic waveshapes of the UHVDC valve insulation and operational tests.
{"title":"Upgrade Study of High Power Electronics Laboratory for ±800kV UHVDC Valves","authors":"Zha Kunpeng, Wen Jia-liang, Yang Xiaonan, Gao Chong, T. Guangfu","doi":"10.1109/ICPST.2008.4745228","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745228","url":null,"abstract":"The paper mainly described the upgrade study of High Power Electronics Laboratory (HPEL) in China Electric Power Research Institute (CEPRI), which will meet all the test requirements of plusmn 800 kV UHVDC valves. Based on the valves electrical parameters of plusmn 800 kV UHVDC demonstration project in China, the paper studied the UHVDC valve type test technology, gave the valve test parameters, the main equipments topologies, rated parameters and the basic waveshapes of the UHVDC valve insulation and operational tests.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131501631","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":null,"pages":null},"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.2008.4745211
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":null,"pages":null},"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.2008.4745171
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":null,"pages":null},"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.2008.4745267
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":null,"pages":null},"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.2008.4745212
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":null,"pages":null},"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.2008.4745256
B. Ravikumar, D. Thukaram, H. Khincha
In this paper, a new approach to enhance the transmission system distance relay co-ordination is presented. The approach depends on the apparent impedance loci seen by the distance relay during all possible disturbances. In a distance relay, the impedance loci seen at the relay location is obtained by extensive transient stability studies. Support vector machines (SVMs), a class of patterns classifiers are used in discriminating zone settings (zone-1, zone-2 and zone-3) using the signals to be used by the relay. Studies on a sample 9-bus are presented for illustrating the proposed scheme.
{"title":"Distance Relay Co-ordination Using Support Vector Machines in Power Transmission System","authors":"B. Ravikumar, D. Thukaram, H. Khincha","doi":"10.1109/ICPST.2008.4745256","DOIUrl":"https://doi.org/10.1109/ICPST.2008.4745256","url":null,"abstract":"In this paper, a new approach to enhance the transmission system distance relay co-ordination is presented. The approach depends on the apparent impedance loci seen by the distance relay during all possible disturbances. In a distance relay, the impedance loci seen at the relay location is obtained by extensive transient stability studies. Support vector machines (SVMs), a class of patterns classifiers are used in discriminating zone settings (zone-1, zone-2 and zone-3) using the signals to be used by the relay. Studies on a sample 9-bus are presented for illustrating the proposed scheme.","PeriodicalId":107016,"journal":{"name":"2008 Joint International Conference on Power System Technology and IEEE Power India Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126985638","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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