Proceedings. Joint International Power Conference Athens Power Tech,最新文献

{"title":"A Package for the Analysis of Automated MV Distribution Networks","authors":"A. Augugliaro, L. Dusonchet, V. Cataliotti, M. Ippolito, G. Morana","doi":"10.1109/APT.1993.686861","DOIUrl":"https://doi.org/10.1109/APT.1993.686861","url":null,"abstract":"","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"677 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114093583","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":"Means To Enhance The Transmission Capability Of Meshed Power Systems","authors":"A. Clerici, G. Testi, M. Chamia","doi":"10.1109/APT.1993.673863","DOIUrl":"https://doi.org/10.1109/APT.1993.673863","url":null,"abstract":"","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114847085","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":"Determination Of Load Shed Using Linear Programming To Avoid Voltage Instability","authors":"T. Tuan, J. Fandino, J. Sabonnadiere, H. Vu, B. Heilbronn","doi":"10.1109/APT.1993.673860","DOIUrl":"https://doi.org/10.1109/APT.1993.673860","url":null,"abstract":"AIWI'RACT This paper presents two methods to dctcriiiine a niimimum load to be shcd using lincar programming to avoid risks of voltage instability. The aini of calculations is to minimizc the load to be shed in ordcr to assure that cithcr voltage profile is maintaincd within ncccssary boundaries. or indicators of voltage instability are lower than or equal to a threshold value. Variables of thcse methods aria real and reactive powcrs to be shcd. Thc first method uscs sensitivities with constraints of voltagcs (Vmill 5 V < Vmax). In this inethod. hcse constraints are formcd locally. Thc sccond method uses indicators of voltage instability with coristraints of indicators (0 5 I3 5 nthr=ho)d). In ordcr to dcvclop such a sccond method in a timcly fashion, indicators arc developed to assess tlic risk of voltage collapse at a particular bus, and a scnsitivity matrix coup1ir.g the amount of load to be slicd and the indicator is computed. The advantages of thc proposed methods arc viable network security, short computing times and low memory requirements due to the use of sparse vector tcchniqucs. The methods dcvelopcd have been tcstcd with tlic 30 bus New-England test systcm and with a 206 bus 400 kV simplificd Frcnch nictwork with satisfactory results.","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116834065","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":"The Effect Of Private Generators Ohf The Voltage Control Of 11 KV Network And On The Operation Of Certain Protective Relays","authors":"S. Salman, F. Jiang, W. Rogers","doi":"10.1109/APT.1993.673867","DOIUrl":"https://doi.org/10.1109/APT.1993.673867","url":null,"abstract":"The addition of private generators to an 1 IkV distribution network car1 affect the operation of the network in two ways. First it may cause the deterioration of the performance of AVC relays due to the changes of active and reactive power flows. Consequently this will adversely affect the control of the voltage of 1lkV network. Second, the sudden reduction or complete disconnection of one private generator may cause an undesirable tripping of the other generators on the system due to the mal-operation of their corresponding undervoltage relays.","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123080242","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":"Stability concerns in the management of the Spanish power system","authors":"M. L. Llorens, J. Rodríguez, J. Sancha","doi":"10.1109/APT.1993.673883","DOIUrl":"https://doi.org/10.1109/APT.1993.673883","url":null,"abstract":"","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124834470","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":"Profile of Voltage Distributions Around a Grounding Electrode in a Two-Layer Earth with Concrete Foundations","authors":"J.L. del Alamo, O. Sánchez","doi":"10.1109/APT.1993.686907","DOIUrl":"https://doi.org/10.1109/APT.1993.686907","url":null,"abstract":"","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128668974","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":"Fuzzy Analysis of Steady State Security for On-Line Assessment","authors":"M. Matos, N. Hatziargyriou, J. Lopes, G. Contaxis","doi":"10.1109/APT.1993.686885","DOIUrl":"https://doi.org/10.1109/APT.1993.686885","url":null,"abstract":"This paper reports the application of fuzzy classification procedures to the on-line steady state security assessment. The traditional \"secure\" or \"insecure\" deterministic classification, based on limit violation indices determined from the post-contingency state, is replaced by fuzzy classification procedures. Fuzzy clustering algorithms are used to identify clusters centers h a training set, previously generated, for each considered contingency. The proposed approach is applied on a realistic model of the Hellenic Interconnected power system for one selected contingency. Performance evaluation tests were performed and the quality of the proposed classification scheme is discussed.","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128725664","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":"Logistic modelling of an autonomous diesel-wind power system of a Greek Island","authors":"A.I. Androutson, M.P. Kourgitakos, A. Machias, M. Papadopoulos","doi":"10.1109/APT.1993.673941","DOIUrl":"https://doi.org/10.1109/APT.1993.673941","url":null,"abstract":"The present paper examines the integration of wind turbines into an existing diesel powered grid of a Greek island. A logistic model has heen developed by National Technical University of Athens and Public Power Corporation in order to analyze the parallel operation of diesel generators and wind turbine generators in terms of power quality and fuel savings. The model utilizes real time data recordings for both island demand load and wind speed at the wincl park sites and permits the precise simulation of the start-stop procedures of the diesel generator sets. The load management problem has been investigated and forecasting as well a s decision making techniques have been introduced. The simulation of the Limnos island power system operation during December 1088 was the case study for the application of the model.","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128643551","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":"Long-term electric load forecasting using a dynamic neural network architecture","authors":"A. Parlos, A. Patton","doi":"10.1109/APT.1993.673908","DOIUrl":"https://doi.org/10.1109/APT.1993.673908","url":null,"abstract":"The use of tlie recurrent inultilaycr perceptron network, a hybrid feedforward antl feedback arcliiteclure, as a inode1 structiire for empirical modeling in electric power system planning is investigated. In particular, tlie long-term forecasting of total energy usage by the U.S. inanufacturing sector is addressed. Forecasting results for the period 19791984 indicate that during and followiiig significant structural clianges, tlie proposed model structure appears to offer improved prediction accuracy. Comparative forecasting results with a conventio~ial approach are presented, deinonstratiiig tlie potential benefits of empirical modeling using Llie recurrent multilayer pcrceptron as a nonlinear state-space model structure. INTRO DUCTI0 N Electric power systems are cliaracterized by increasingly more coniplex and more sophisticated daily 011erations arid resource planning activities. Furtliermore, iii view of world events in the last twenty years, tlie safe, reliable, and cconomically eficient production and delivery of electric energy lias become of vital importance. Tlius, the elficiciit and optimurn economic operation antl planning of electric power systems has occupied an increasingly more important position in the electric power industry. Prior to 1973, electric utilities in the U S . spent approxiniatrly 20 % of their tola1 revenues on fuel for electricity production. That numher increased to 40 % of tlie total revenues by 1980. ‘l’lie amounts involved just for annual fuel expenditures i n a large utility company can be on the order of a few billion dollars. Thus, even small pcrceiitagc savings, resulting fioin iinprovctl oper a t ion aii tl p1 mi 11 i ng , coil Id 11 avc sig ni li can t ecou oin i c impact 0 1 1 both the supplier ant1 tiir co~isiiiiirr of clectiic energy. Paper APT 213-25-13 accepted for pieseiitation at the IEEEBTUA Athens Power Tech Conference: “Planning, Operation and Control of Today’s Electlic Power Systeiils“, Athens, Gieece, Sept. 54, 1Y93. Load forecasting lias beconie one of the most important aspects of electric utility planning. The economic consequences of improved load forecasting approaches have kept development of alternate, more accurate algorithms at the forefront of electric power research. From short-term load forecasts used in the daily unit allocations [I], to mid-term load forecasts used for fuel budgeting, aid to tlie long-term load forecasts used for resource planning and utility expansion, numerous different techniques have been proposed and are currently in use [2]. These methods can be classified into two major categories: (I) time series approaches, treating the load pattern as a time series signa3 and predicting tlie future load using some time series aiialysis tool, and, (2) regression approaches, which recognize the strong effects of weather on electric load use, for example, and attempt to find a (usually static) functional relationship between the two. Tlie major sliortconiing of these appro","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123755850","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":"Fuzzy Models and Techniques for the Calculation of Radial Distribution Networks","authors":"K. Kauhaniemi","doi":"10.1109/APT.1993.686912","DOIUrl":"https://doi.org/10.1109/APT.1993.686912","url":null,"abstract":"Tire fuzzy set tlieory offers au effective way to iiiodel inexact or uncertain data. In this paper it consislent set of fuzzy models and techniques for the calculation of electricity distribution networks is presented. The theories relating to the fuzzy numbers are siruplified into a form suitable for practical application. Also several useful methods of dah representation are given. The utilization of tlie fuzzy approacli is deuioustr:ited by a radial load flow method where the voltage in the substation and the power deuiaucls are represented by fuzzy nuiiibers.","PeriodicalId":241767,"journal":{"name":"Proceedings. Joint International Power Conference Athens Power Tech,","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125735571","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}