A. Hamlyn, H. Cheung, T. Mander, Lin Wang, Cungang Yang, R. Cheung
{"title":"Network Security Management and Authentication of Actions for Smart Grids Operations","authors":"A. Hamlyn, H. Cheung, T. Mander, Lin Wang, Cungang Yang, R. Cheung","doi":"10.1109/EPC.2007.4520302","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520302","url":null,"abstract":"Operations of electricity power systems have recently become more intricate due to development of microgrids, execution of open access competition, and use of network-controlled devices, etc. Computer network therefore turns into a key integral of modern power-grid operations. This paper proposes a new utility computer network security management and authentication for actions / commands requests in smart-grid operations. This management covers multiple security domains in a new security architecture designed for smart power grids. This paper presents the strategy and procedure of security checks and authentications of commands requests for operations in the host area electric power system (AEPS) and interconnected multiple neighboring AEPS. Case studies of the new security management and authentication for smart grids operations are presented.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123464408","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}
{"title":"Properties and Applications of Quadratic Converters","authors":"S. Bassan, G. Moschopoulos","doi":"10.1109/EPC.2007.4520317","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520317","url":null,"abstract":"The properties and applications of power electronic converters with voltage conversion ratios that are quadratically dependent on the duty ratio are discussed in this paper. A novel, soft-switched, three-phase, single-switch quadratic buck converter is also proposed. The converter is a zero-current- switching (ZCS) quasi-resonant type converter that can operate with significantly less switching frequency variation because of the quadratic nature of the converter. The operating principle of the proposed converter is explained, its operating modes along with key waveforms are shown and simulated results are presented in the paper.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125312005","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}
{"title":"Supervisory Hybrid Control of a Micro Grid System","authors":"M. Khan, M. Iravani","doi":"10.1109/EPC.2007.4520300","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520300","url":null,"abstract":"This paper presents a systematic approach for the design and analysis of a supervisory hybrid control scheme for a micro grid system using hybrid control techniques. A generic micro grid configuration is assumed. The approach is elaborated with a specific micro grid configuration containing a self-excited induction machine based wind energy conversion system. By definition a micro grid operates in both grid-connected and in isolated modes. In each mode of operation there could be different combinations of the available energy sources in the system that are catering to the load demand. A hybrid control scheme which utilizes different control mechanisms for optimal control of a system under different operating conditions and in different operating states, presents an attractive paradigm for the control design of such a system. By partitioning a micro grid into different modules along suitable axis, the complexity of a Multiple Input Multiple Output (MIMO) control problem of the system can be significantly reduced. The control of the different modules of a micro grid system can then be tackled using the well established linear control theory which could then be combined using suitable transition, load and power management strategies to achieve optimal control of the micro grid system in all its desirable operating states. Supervisory hybrid control of a wind energy conversion and storage system is presented to illustrate the supervisory hybrid control design and analysis philosophy outlined in this paper.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125611616","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}
{"title":"New Generation of Signal processing Techniques for Power System Applications","authors":"M. Karimi-Ghartemani, A. Bakhshai, S. Eren","doi":"10.1109/EPC.2007.4520339","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520339","url":null,"abstract":"This paper presents several techniques for the processing of power system signals in a power system setup. The techniques exhibit a desirable performance against signal pollutions such as noise and distortions, signal unbalance (in three-phase applications), and variations in the signal attributes (mainly its frequency). These features render them a promising set of options for modern power systems in which all or some of these undesired factors may be amplified depending on the case. Single-phase and three-phase applications are both examined and appropriate techniques are suggested for different scenarios.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123743174","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}
{"title":"VRB Modelling for the Study of Output Terminal Voltages, Internal Losses and Performance","authors":"J. Chahwan, C. Abbey, G. Joós","doi":"10.1109/EPC.2007.4520363","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520363","url":null,"abstract":"There is a growing interest in using large scale energy storage in wind systems for power smoothing and energy redistribution. Vanadium-redox batteries are well suited for this type of application because of their high efficiency, high scalability, fast response, long life and low maintenance requirements. This paper looks into determining an appropriate electrical vanadium-redox battery (VRB) model for this type of application. In particular, model details including stack voltage, series resistance, state of charge (SOC) and transients modeling are examined. The model is used to obtain results on the energy content, and terminal voltage profile of the battery. The battery performance is also assessed, including VI transfer characteristic, transient response and efficiency.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125861027","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. Cheung, A. Hamlyn, T. Mander, Cungang Yang, R. Cheung
{"title":"Strategy and Role-based Model of Security Access Control for Smart Grids Computer Networks","authors":"H. Cheung, A. Hamlyn, T. Mander, Cungang Yang, R. Cheung","doi":"10.1109/EPC.2007.4520369","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520369","url":null,"abstract":"Recent development of microgrids in power systems, introduction of open access competition by governments in electricity industries, and increased use of network-controlled devices in power systems have resulted utilities in a greater reliance on computer networks for proper power-grid operations. This paper proposes a new network access control strategy and role-based model to increase the power-grid network security. The new model extends the network access control from a single security domain to multiple domains for interconnected microgrids. This paper also proposes a security policy managing method using XML to simplify power-grid network security administrations. With the proposed method, the authorization is independently defined and separated from policy representations and implementation mechanisms, and a digital credential is introduced to establish trust and role assignments for users in different microgrid domains. Case studies of the new model are presented.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126732074","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}
{"title":"Annual Electricity Demand Prediction for Iranian Agriculture Sector Using ANN and PSO","authors":"S. Kani, N. Ershad","doi":"10.1109/EPC.2007.4520373","DOIUrl":"https://doi.org/10.1109/EPC.2007.4520373","url":null,"abstract":"In this study, we used PSO algorithm and ANN to predict annual electricity consumption in Iranian agriculture sector. The economic indicators used in this paper are price, value added, number of customers and consumption in the previous periods. To predict the future values, a linear- logarithmic model of electrical energy demand is considered. The PSO algorithm applied in this study has been tuned for all its parameters and the best coefficients with minimum error are identified, while all parameter values are tested concurrently. Consumption in the previous periods has been used for testing estimated model. The estimation errors of PSO algorithm are less than that of estimated by genetic algorithm and regression method. In addition, ANN is used to forecast each independent variable and then electricity consumption is forecasted up to year 2010. Electricity consumption in Iranian agriculture sector from 1981 to 2005 is considered as the case for this study.","PeriodicalId":196861,"journal":{"name":"2007 IEEE Canada Electrical Power Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131623148","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}