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

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Substation's switchgear's reliability evaluation as a part of transmission, distribution and generation modeling software 变电站开关柜可靠性评估作为输配电发电建模软件的一部分
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550004
A. Lvov, A. Mutule
{"title":"Substation's switchgear's reliability evaluation as a part of transmission, distribution and generation modeling software","authors":"A. Lvov, A. Mutule","doi":"10.1109/PQ.2010.5550004","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550004","url":null,"abstract":"The paper gives the main idea of substation's switchgear's reliability evaluation module as a part of software that was developed in Riga Technical University in frames of project “Information technology to ensure the sustainability of generation and transmission grid”. The module allows easily evaluate switchgear's up-state's probability and interruption time for large amount of different types of switchgears by switchgear's bay's faults and elements standardization. Also it is possible to evaluate energy not supplied and costs related to energy not supplied due to switchgear's fault.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"4306 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":"128883316","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
Influence of system protection to estonian power system security 系统保护对爱沙尼亚电力系统安全的影响
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550023
J. Kilter, A. Reinson, R. Kraav
{"title":"Influence of system protection to estonian power system security","authors":"J. Kilter, A. Reinson, R. Kraav","doi":"10.1109/PQ.2010.5550023","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550023","url":null,"abstract":"In this paper the current system protection influence to Estonian power system security is observed and future needs are discussed and analysed. Due to the changes in Baltic region power generation together with increasing demand and changes in the directions of the power flows, but also due to the planning and building of new interconnections new solutions that consider different limitations must be developed and thoroughly analysed in order to secure the Estonian power system security. This topic is extremely important and in this paper first steps in this field from the perspective of Estonian power system are covered.","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":"130182864","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
Harmonic losses in induction motors caused by voltage waveform distortions 电压波形畸变引起的感应电动机谐波损耗
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550006
H. Mõlder, T. Vinnal, V. Beldjajev
{"title":"Harmonic losses in induction motors caused by voltage waveform distortions","authors":"H. Mõlder, T. Vinnal, V. Beldjajev","doi":"10.1109/PQ.2010.5550006","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550006","url":null,"abstract":"This paper focuses on supply voltage dependence on power factor correction for industrial facilities. The influence on power factor to supply voltage level, harmonic distortions, harmonic power losses and particularly induction motors harmonic losses is analyzed. The measurement results of voltage harmonics spectrum in industrial 0.4 kV power system are presented. Practical measurements and calculations of high level THDU harmonic losses of an induction motor are analyzed.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"198 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":"123351403","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: 13
Investigation of line-commutated three-phase converters with impedance unbalance 阻抗不平衡的线换相三相变换器研究
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-16 DOI: 10.1109/PQ.2010.5550005
M. Weiland, G. Herold, T. Freudenstein
{"title":"Investigation of line-commutated three-phase converters with impedance unbalance","authors":"M. Weiland, G. Herold, T. Freudenstein","doi":"10.1109/PQ.2010.5550005","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550005","url":null,"abstract":"Current converters operated in unbalanced electrical three-phase systems will generally work asymmetrically, which causes the appearance of non-characteristic harmonics and therefore higher distortion levels. In this paper unbalances are considered, that are caused by asymmetrical AC-line short-circuit impedances, which are usually a result of unbalanced transmission lines. In the case of thyristor converters one can react on a given unbalance with asymmetrical firing angles. This offers the opportunity to make the converters operation more balanced und to lower the distortion caused by unbalance. This paper deals with the calculation of a current converter's asymmetrical operation and its optimization by use of asymmetrical firing angles.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"81 3 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":"129232285","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
Characteristic spectra of harmonic currents in austrian electricity transmission and distribution networks 奥地利输配电网络中谐波电流的特征谱
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference Pub Date : 2010-06-01 DOI: 10.1109/PQ.2010.5550025
H. Ergun, H. Renner, K. Friedl
{"title":"Characteristic spectra of harmonic currents in austrian electricity transmission and distribution networks","authors":"H. Ergun, H. Renner, K. Friedl","doi":"10.1109/PQ.2010.5550025","DOIUrl":"https://doi.org/10.1109/PQ.2010.5550025","url":null,"abstract":"In this paper the results from a study about typical harmonic spectra in Austrian electricity distribution and transmission networks are presented. The study was done by Graz University of Technology in cooperation with the Association of Austrian Electricity Companies (VEÖ). Besides characteristic harmonic spectra for current and voltage, it also includes weighting coefficients for evaluation of the harmonic impact on electric and magnetic fields. Furthermore, symmetrical component analysis is applied to the harmonics, since the zero sequence system may lead to a significant contribution to electric or magnetic fields.","PeriodicalId":356169,"journal":{"name":"Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114134573","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
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