000001046 001__ 1046
000001046 035__ $$a32031 
000001046 037__ $$aROMDOC-THESIS-2016-533
000001046 041__ $$arum
000001046 100__ $$aBucătaru, Constantin-Gabriel
000001046 245__ $$aContribuţii la analiza perturbaţiilor conduse în reţele de distribuţie
000001046 260__ $$c2010-01-06
000001046 520__ $$aUniversity “POLITEHNICA” of Bucharest Power ENGINEERING Faculty CONTRIBUTIONS TO THE CONDUCTED PERTURBATION ANALYSIS IN DISTRIBUTION NETWORKS In order to perform a comprehensive characterization of the performances concerning voltage sags and short term interruptions in a power network, complete information is needed regarding the network busses and the consumers connected within the entire power system. Studies and analyses based on real-life network voltage sags measurements were performed, establishing indices of voltage sags for a real distribution network. Moreover, their influence within the network was also studied. An evaluation of the effects of voltage interruptions can be made based on full information regarding interruption lengths and occurrences at a certain consumer, over a given period of time. The indices that characterize voltage interruptions aggregate data concerning both the supply system performances and the consumers connected to that power network. Voltage sags and interruptions lead to substantial economic losses, mainly made up from potential manufacturing losses, but also from market losses and the loss of trust and comfort of users. Thus, the need of protection schemes at the consumers’ side becomes more desirable. Chapter three presents an analysis of distribution topologies from a real power network. Taking into consideration the main objectives of the distribution operator, modernization solutions were proposed and designed, restricted by the current equipment state. Two methods for power quality evaluation are proposed, from both “objective” and “subjective” approach styles, alongside methods for power quality improvement. The determination of the vulnerability area represents the foundation in the estimation of voltage sags due to events occurrences and propagations in distribution networks, but it also helps investors in choosing the coupling point.
000001046 6531_ $$aGoluri de tensiune -- Teză de doctorat
000001046 6531_ $$aEnergie electrică -- Calitate -- Teză de doctorat
000001046 6531_ $$aReţele electrice de distribuţie -- Teză de doctorat
000001046 8560_ $$ff_costache@library.pub.ro
000001046 8564_ $$uhttp://romdoc.upb.ro/record/1046/files/$$zAccess to Fulltext
000001046 980__ $$aTHESIS