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An improved on-line neural network controller for multi-variable control of UPFC 一种用于UPFC多变量控制的改进在线神经网络控制器
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632504
G. Sridhar Reddy, R.K. Singh
{"title":"An improved on-line neural network controller for multi-variable control of UPFC","authors":"G. Sridhar Reddy, R.K. Singh","doi":"10.1109/POWERI.2006.1632504","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632504","url":null,"abstract":"This paper proposes an improved on-line neural network (OLNN) controller by incorporating changes in neural network architecture of indirect-inverse identification neural network controller (IIINNC), which was proposed earlier for controlling power flow, AC bus and DC link voltages of unified power flow controller (UPFC). A new learning algorithm has been derived for the proposed OLNN controller. The proposed OLNN controller requires less training and validation compared to that of the IIINNC. The architecture and control algorithm of the proposed neural controller reduces the complexity and latency time in comparison to the IIINNC. Simulation studies carried out demonstrates the applicability of the proposed on-line neural controller for the multi-variable control of UPFC","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130721806","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}
引用次数: 2
Identification of catastrophic failures in power systems using pattern recognition 基于模式识别的电力系统灾难性故障识别
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632588
J. Hazra, A. Sinha
{"title":"Identification of catastrophic failures in power systems using pattern recognition","authors":"J. Hazra, A. Sinha","doi":"10.1109/POWERI.2006.1632588","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632588","url":null,"abstract":"This paper presents a new approach for online identification of sequences of events (worms) leading to catastrophic failures using pattern recognition method. Chains of events leading to catastrophic failures are recognized using risk indices. Risk index condenses both probability of occurrences of any contingency and its consequences i.e. severity in terms of load loss, overloads, voltage violations etc. Worms for different operating conditions (i.e. for different loading conditions and topologies) are identified offline and stored in the database. Probable worms for any new operating condition are recognized from the stored knowledge of similar operating conditions using pattern recognition scheme","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131446364","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}
引用次数: 2
Transformer winding detailed modeling for protection studies 变压器绕组的详细建模保护研究
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632573
F. Zhalefar, M. Sanaye-Pasand
{"title":"Transformer winding detailed modeling for protection studies","authors":"F. Zhalefar, M. Sanaye-Pasand","doi":"10.1109/POWERI.2006.1632573","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632573","url":null,"abstract":"Transformer is one of the most sensitive and complex elements of a power system. Nowadays, simulation is a common and effective way for behavior analysis of this element. The main objective in this paper is protective studies of power transformer. In this study a transformer model based on the self and mutual inductances has been proposed. Also a 230/63 kV, 125 MVA transformer with two-winding and three-legged core has been simulated. Obtained simulation studies are compared with test data. Obtained results confirm validity of the developed method","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134125119","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}
引用次数: 4
Powerline networking as an alternative networking solution: a South African experience 作为替代网络解决方案的电力线网络:南非的经验
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632490
S. Ntuli, H. Muyingi, A. Terzoli, G. Rao
{"title":"Powerline networking as an alternative networking solution: a South African experience","authors":"S. Ntuli, H. Muyingi, A. Terzoli, G. Rao","doi":"10.1109/POWERI.2006.1632490","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632490","url":null,"abstract":"In the recent years, many new networking technologies have been introduced, and powerline communications (PLC) is one such technology, this paper gives a detailed description of PLC. Firstly a brief history of PLC is given. The different PLC technologies are described, a comparison of PLC to other networking technologies, namely Ethernet, wireless and another no new wires technology known as phoneline networking is given. The comparison focuses on media access control and the frame format. The short comings of PLC are highlighted. A discussion of the results of tests carried out on a low voltage powerline network at the University of Fort Hare and other test sites follows. In conclusion the paper focuses on interference from PLC and the future of the networking technology","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134623191","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}
引用次数: 4
Ant colony search-based loss minimum for reconfiguration of distribution systems 基于蚁群搜索的配电系统重构损失最小算法
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632571
T. Khoa, B. Phan
{"title":"Ant colony search-based loss minimum for reconfiguration of distribution systems","authors":"T. Khoa, B. Phan","doi":"10.1109/POWERI.2006.1632571","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632571","url":null,"abstract":"This paper presents one of applications of the ant colony search method to reduce the minimum losses of distribution network. The configuration of distribution network is defined by the tie switches and sectionalized switches. The configuration optimization problem of distribution network is a combination optimization with a large search space involved the operational constraints of the distribution. The results of the ACS are compared to the ones obtained from other heuristic methods (heuristic, simulated annealing, genetic). All of the algorithms are programmed on Matlab applied to the typical distribution system 3 feeders, 17 buses, 16 switches and one feeder of Hochiminh Utility, 55 buses, 13 switches. This ant colony search algorithms obtains computation time faster and more reliability than other ones","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133513386","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}
引用次数: 26
The theory of CT saturation detection based on virtual impedance in bus-bar differential protection 母线差动保护中基于虚阻抗的CT饱和检测原理
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632527
Yongbin Zhao, Yuping Lu
{"title":"The theory of CT saturation detection based on virtual impedance in bus-bar differential protection","authors":"Yongbin Zhao, Yuping Lu","doi":"10.1109/POWERI.2006.1632527","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632527","url":null,"abstract":"The serious short circuit current may possibly lead to current transformer (CT) saturation. If the CT saturates in an external fault, the bus-bar differential protection may operate incorrectly. Most bus-bar differential relays use low-impedance criterion to detect CT saturation to avoid false tripping for a nearby external fault. It is very important research direction for accurately detecting CT saturation in bus-bar differential protection. Analyzing CT saturation detection methods of the current waveform, the variety of differential current, harmonic ratio, and so on, these methods are not best solutions for serious CT saturation. The paper proposed a new method for CT saturation detection. The method is to suppose a virtual impedance branch to the power bus bar, then to calculate the value changes in the virtual impedance with the transmission line RL integral model, to detect CT saturation when an external or internal fault occurs","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133462735","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}
引用次数: 0
Power system security improvement using the unified power flow controller (UPFC) 统一潮流控制器(UPFC)提高电力系统安全性
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632632
A. Kazemi, H. Shayanfar, A. Rabiee, J. Aghaie
{"title":"Power system security improvement using the unified power flow controller (UPFC)","authors":"A. Kazemi, H. Shayanfar, A. Rabiee, J. Aghaie","doi":"10.1109/POWERI.2006.1632632","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632632","url":null,"abstract":"This paper presents an algorithm to find the operating point of UPFCs for the enhancement of system security level. The proposed algorithm minimizes the security index iteratively. The security index indicates the overload level of transmission lines. The sensitivity indicating the change of the index due to the changes in the UPFC real power output is calculated. In each iteration, according to this sensitivity, the proposed algorithm finds a new UPFC operating point to reduce the index or increase the security margin. Also two other indices related to system security level are examined after the UPFCs operating points determination. The proposed algorithm is verified by IEEE 14 bus network. The results show that the power flow congestion can be relieved and the security margin increased both in overloaded or faulted condition by applying the suggested operating algorithm to UPFCs","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"500 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133826495","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}
引用次数: 12
State estimation based LQ optimal control in application to hydro plant 基于状态估计的LQ最优控制在水电厂中的应用
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632608
N. Kishor, S. Singh, P. Sharma
{"title":"State estimation based LQ optimal control in application to hydro plant","authors":"N. Kishor, S. Singh, P. Sharma","doi":"10.1109/POWERI.2006.1632608","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632608","url":null,"abstract":"The state estimation of inelastic and elastic fifth-order state-space model of hydro plant is performed. The method adopted for state estimation is based on second-order polynomial approximations of a multi-dimensional interpolation formula. It is found that the state estimation of plant by this method outperforms to linear Kalman filter in terms of estimation. Then a state estimation based linear quadratic (LQ) approach for hydro turbine speed control is presented","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123013783","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}
引用次数: 4
A comprehensive analysis of intelligent controllers for load frequency control 负载频率控制智能控制器的综合分析
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632619
H. Mathur, S. Ghosh
{"title":"A comprehensive analysis of intelligent controllers for load frequency control","authors":"H. Mathur, S. Ghosh","doi":"10.1109/POWERI.2006.1632619","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632619","url":null,"abstract":"This paper presents summaries of novel approaches of artificial intelligence (AI) techniques, like fuzzy logic, artificial neural network (ANN), hybrid fuzzy neural network (HFNN), genetic algorithm (GA) for the load frequency control of electrical power system. The limitations of conventional controls such as proportional, integral and derivative are slow and lack of efficiency in handling system nonlinearities. Since high frequency deviation may lead to system collapse, this necessitates an accurate and fast acting controller to maintain the constant nominal system frequency. The intelligent controllers are used for load frequency control for the single area system, multi area interconnected system. The performance of intelligent controllers with the conventional controllers has been thoroughly compared and analyzed","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124041192","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}
引用次数: 48
Transformer core modeling as applied to slow transients and protective studies 变压器铁心建模应用于慢瞬变和保护研究
2006 IEEE Power India Conference Pub Date : 2006-06-05 DOI: 10.1109/POWERI.2006.1632544
F. Zhalefar, M. Sanaye-Pasand
{"title":"Transformer core modeling as applied to slow transients and protective studies","authors":"F. Zhalefar, M. Sanaye-Pasand","doi":"10.1109/POWERI.2006.1632544","DOIUrl":"https://doi.org/10.1109/POWERI.2006.1632544","url":null,"abstract":"Magnetic core has major effects on the response of transformers at low frequencies. For better understanding of transformer behaviors and modeling them accurately, it is necessary to study core behaviors and their effects on transformer current and voltage waveforms. For better studying core behaviors, it is possible to divide total flux of windings into core and air fluxes. In this paper, modeling of core fluxes by employing the principle of duality method is discussed. At the end, a real 230/63 kV, 125 MVA transformer with two winding and three-legged core has been simulated. Obtained simulation results are compared with test results and good agreement between these results are obtained","PeriodicalId":191301,"journal":{"name":"2006 IEEE Power India Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129195326","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}
引用次数: 10
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