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Thesis
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Contribuţii la analiza puterilor şi a unor indici de calitate ai funcţionării sistemelor electrice navale
Dragomir, Eduard
2008-07-28
Abstract: UNIVERSITATEA POLITEHNICA BUCUREŞTI FACULTATEA DE INGINERIE ELECTRICĂ ABSTRACT CONTRIBUŢII LA ANALIZA PUTERILOR ŞI A UNOR INDICI DE CALITATE AI FUNCŢIONĂRII SISTEMELOR ELECTRICE NAVALE Conducător ştiinţific Autor Prof.dr.ing. Florin MANEA Ing. Eduard DRAGOMIR În lucrare s-a urmărit o analiză a puterilor instantanee, medii şi efective a sistemelor nesimetrice şi nesinusoidale, evidenţiindu-se aspecte fizice, teoretice şi practice. Lucrarea urmăreşte o abordare unitară a proprietăţilor de ortogonalitate a componentelor de curenţi, tensiuni şi puteri pentru evidenţierea proprietăţii de conservare a puterilor, în vederea soluţionării problemei practice de compensare a componentelor inactive (reactive şi de nesimetrie). Au fost obţinute noi expresii ale componentelor funcţionalei putere deformantă dependente de defazajele armonicelor şi nu de fazele iniţiale arbitrare ale armonicelor respective. La analiza sistemelor trifazate nesimetrice sau folosit componente simetrice fazoriale corelate cu vectori reprezentativi spaţio-temporali. S-a realizat o generalizare a noţiunii de putere reactivă compensabilă asociată diverselor spectre de reactanţă ale unor filtre optimizate pentru curenţii reziduali minimi. Pentru calculul susceptanţelor necesare simetrizării reactive a curenţilor inverşi au fost obţinute expresii ale unor puteri măsurabile din care au rezultat valorile susceptanţelor necesare. Au fost analizate rezultatele unor măsurători experimentale efectuate în sistemul energetic al unei nave pentru aprecierea unor indici de calitate ai funcţionării. THE POLITEHNICA UNIVERSITY OF BUCUREŞTI FACULTY OF ELECTRICAL ENGINEERING CONTRIBUTIONS TO THE ANALYSIS OF POWERS AND OF SOME QUALITY INDICATORS REGARDING THE FUNCTIONING OF NAVAL ELECTRICAL SYSTEMS Mentor Author Prof.dr.ing. Florin MANEA Ing. Eduard DRAGOMIR The paper deals with the analysis of instantaneous, medium and effective power of nonsymmetrical and no sinusoidal systems, focusing on the physical, theoretical and practical aspects. It also sets a unitary approach of the orthogonal properties of the current, voltage and power components, in order to highlight the conservation characteristic of powers and solve the practical issue of compensation of the inactive components (which may be reactive and nonsymmetrical). As a result, new expressions of functional components were obtained: the deforming power was found to be dependent on the harmonics alternation of phase and not on the arbitrary, initial phases of the respective harmonics. On the analysis of the three-phase, nonsymmetrical systems, fazorial symmetrical components were used, and they were correlated with representative time and space vectors. A generalization of the notion of compensatory reactive power, associated to different filter choke spectrum of the optimized filters for the minimum residual currents was completed. For the calculation of the susceptances necessary for the reactive balancing of the reverse currents, new expressions of measurable powers were obtained, and their final results were the values of the necessary susceptances. An analysis of the results of experimental measurements in the energetic system of a ship was made, in order to get the quality parameters of the system operating.
Keyword(s): Calitate -- Control -- Sisteme electrice de putere -- Teză de doctorat ; Sisteme electrice de putere -- Nave -- Teză de doctorat
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Record created 2016-06-22, last modified 2016-06-22
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