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Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference最新文献

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Influence of regenerative braking to power characteristics of a gantry crane 再生制动对龙门起重机动力特性的影响
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550015
V. Beldjajev, T. Lehtla, H. Mõlder
{"title":"Influence of regenerative braking to power characteristics of a gantry crane","authors":"V. Beldjajev, T. Lehtla, H. Mõlder","doi":"10.1109/PQ.2010.5550015","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550015","url":null,"abstract":"The aim of this paper is to present and discuss the results of the power quality measurements that were carried out on the gantry crane which is settled in the container centre of Muuga seaport in Estonia. When lowering the hoist and braking the trolley, the driven motors operate in a regenerative braking mode and feed some active power back into the electrical grid. As the load of a crane varies during each cycle the measurements were carried out in order to analyze the influence of variable energy flow to power characteristics.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124759714","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: 14
Quenching of Partial Discharges in medium voltage networks by traditional arc suppression coil 传统消弧线圈对中压电网局部放电的抑制作用
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5549995
J. Rozenkrons, V. Šults, I. Priedīte
{"title":"Quenching of Partial Discharges in medium voltage networks by traditional arc suppression coil","authors":"J. Rozenkrons, V. Šults, I. Priedīte","doi":"10.1109/PQ.2010.5549995","DOIUrl":"https://doi.org/10.1109/PQ.2010.5549995","url":null,"abstract":"In this article, we describe a possibility to quench Partial Discharges (PD) in medium voltage networks by using Residual Current Compensation (RCC) device (Swedish Neutral), proposed by K. Winter. If voltage network phase PD activity increases in one of medium, the RCC device shifts network neutral potential in such a way, that voltage of spoiled phase to earth decreases below PD extinction level. The expensive RCC device is necessary.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114680038","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
Estimation and elimination of harmonics in power system using modified FFT with variable learning of Adaline 基于Adaline变量学习的改进FFT估计与消除电力系统谐波
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550016
Neeraj Sharma, R. Gupta, Dulara Sharma, A. Swarnkar, N. Gupta
{"title":"Estimation and elimination of harmonics in power system using modified FFT with variable learning of Adaline","authors":"Neeraj Sharma, R. Gupta, Dulara Sharma, A. Swarnkar, N. Gupta","doi":"10.1109/PQ.2010.5550016","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550016","url":null,"abstract":"This paper presents a new technique for harmonic detection, estimation and elimination in power system. The approach expresses the input signal in the form of Fourier Transformation and adjusts the Fourier coefficients using Linear Adaptive Filters (Adaline). Two of the existing approaches using conventional Fast Fourier transformation (FFT) and FFT with modified W-H learning have been discussed with their merits and demerits. A new approach has been proposed using a network comprising three different Adalines and involving variable learning rate. This approach is able to mitigate the shortcomings of the existing techniques and is time efficient as well. The detailed architecture for the proposed approach has been discussed and the algorithm has then been tested on different test signals. The approach has been compared with the existing techniques and it's superiority over these has thus been established.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"PP 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126410999","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: 5
Voltage unbalance emission assessment 电压不平衡排放评估
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550022
H. Renner
{"title":"Voltage unbalance emission assessment","authors":"H. Renner","doi":"10.1109/PQ.2010.5550022","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550022","url":null,"abstract":"Aim of this paper is to draw the attention on the principle origin for unbalance, taking into account the part caused by negative sequence currents as well as the part arising from non ideal grid impedance with non negligible coupling impedance between the positive and negative sequence system. This system inherent part originates from non transposed lines or parallel three phase lines operating over long distances. In 61000-3-13 this is taken into account by a factor kuE, which is explained in this paper.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134404191","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: 33
The study about indefinite fault causes in Estonian 110 kV power grid 爱沙尼亚110千伏电网不确定故障原因研究
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5549999
P. Taklaja, R. Oidram
{"title":"The study about indefinite fault causes in Estonian 110 kV power grid","authors":"P. Taklaja, R. Oidram","doi":"10.1109/PQ.2010.5549999","DOIUrl":"https://doi.org/10.1109/PQ.2010.5549999","url":null,"abstract":"The study examines the cause of indefinite flashovers in the Estonian 110 kV power grid. The number of indefinite flashovers has increased significantly in last years causing a lot of problems to the TSO. Concluding the study one can argue that most of indefinite faults in power grid are in high probability caused by the wildlife, more specifically birds. Main “cause” could in high probability be migrating bird called White Stork.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125206134","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
Power quality real-time Monitoring System for the new Brazilian standard 电能质量实时监控系统为巴西新标准
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550021
G. P. Colnago, J. Vieira, G. Sousa, J. R. Macedo
{"title":"Power quality real-time Monitoring System for the new Brazilian standard","authors":"G. P. Colnago, J. Vieira, G. Sousa, J. R. Macedo","doi":"10.1109/PQ.2010.5550021","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550021","url":null,"abstract":"This work deals with the development of a digital power quality meter to comply with the new standard which regulates the Power Quality requirements in Brazil. The purpose was to develop a low cost device able to monitor the main standard indices such as the steady state RMS voltage, harmonic distortion, voltage fluctuation, voltage unbalance, voltage sags and swells, and power supply interruptions in real-time. Through a cellular module the device meter can send measurements and data to a remote server, as well as be remotely controlled and configured. Other discussed point is the power quality indices of the new standard.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"210 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121198249","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: 1
Probabilistic evaluation of wind turbine effects on power system transient behavior 风电机组对电力系统暂态影响的概率评估
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550014
Emmanouil Loukarakis
{"title":"Probabilistic evaluation of wind turbine effects on power system transient behavior","authors":"Emmanouil Loukarakis","doi":"10.1109/PQ.2010.5550014","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550014","url":null,"abstract":"As wind penetration in modern power grids increases, concerns have been expressed over its effect on power system dynamic behavior. Typically this has been evaluated through the solution of specific worst case scenarios. However this approach does not give a complete picture and its results may be misleading. This paper presents a Monte-Carlo based method for evaluating increasing wind penetration effects, through the development of voltage and frequency profiles for the power system buses. Wind turbine models and system operation considerations affecting the results are discussed. Simulations are carried out in software developed in Matlab/ Simulink.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115654372","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
Determination of the necessity of protection against lightning and overvoltage and its choice 防雷和过电压防护必要性的测定及其选择
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550002
M. Ozolnieks, E. Vanzovičs
{"title":"Determination of the necessity of protection against lightning and overvoltage and its choice","authors":"M. Ozolnieks, E. Vanzovičs","doi":"10.1109/PQ.2010.5550002","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550002","url":null,"abstract":"In this paper a description of the existing situation regarding lightning protection, overvoltage protection, and other protection measures against the dangerous influence of lightning for structures and the service lines that are connected to those structures is given. In this paper two possibilities, how to improve the existing situation, are proposed - by implementation of a special table for a quick choice of the class of lightning protection system and determination of the need for surge protective devices and/or by using intervals of values instead of fixed values of parameters in the calculations, that are necessary for risk assessment.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120957912","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
Design of renewable micro generation monitoring and control application 可再生微发电监控应用设计
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550012
M. Lehtla, I. Kõivastik, T. Moller, A. Kallaste, A. Rosin
{"title":"Design of renewable micro generation monitoring and control application","authors":"M. Lehtla, I. Kõivastik, T. Moller, A. Kallaste, A. Rosin","doi":"10.1109/PQ.2010.5550012","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550012","url":null,"abstract":"A multitude of flexible low-cost communication hardware with sufficient performance is available for control of microgeneration and loads in households, but proprietary software is often limited. Robust and simply maintainable solutions are often required in practical applications besides highly-multifunctional programmable logic controllers developed for large industries. Software should be flexible for adoption to control processes and environment. Open-source software is under development and requires more effort. Perspective practical approach to high-quality automation and telemetry, based on open-source software and ultralow component cost is described in this paper. Developed add-ons can be further used for control of micro generation units with power range from 0.5 to 20 kW, such as small-windmills, hydropower stations or different loads in households.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131251628","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
Experimental analysis of electrical values during earth faults 接地故障时电值的实验分析
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550000
P. Toman, J. Dvorak, J. Orságová, S. Mišák
{"title":"Experimental analysis of electrical values during earth faults","authors":"P. Toman, J. Dvorak, J. Orságová, S. Mišák","doi":"10.1109/PQ.2010.5550000","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550000","url":null,"abstract":"The MV compensated Networks in Czech Republic are operated as nonsymmetrical, that means as networks with non-transposed lines. The paper deals with experiments which were realized in distribution network held by E.ON Czech Republic. There were made a few different faults (low-impedance, spark gap arc, damaged MV cable, 1.6 kΩ, 4 kΩ and unearthed console of concrete tower) for three different places, for tuned and untuned Petersen coil and for some types of faults for all phases too, that means forty eight experimental faults. During each experiment the shunting of affected phase was applied.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129179551","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: 1
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