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Search results for: transformer
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Year: 2015, Volume: 15, Number: 1
... upon the efficiencies of DC/DC converters other hand, AC system had its transformer capable of high making up the system. These converters show varying voltage power ... distribution systems; also in case of DC system various replacing the distribution step down transformers currently voltage levels are used. Besides this, a back-up power found in ...
Year: 2015, Volume: 15, Number: 1
... signal. It managed to analyze and to [15] A. Abu-Siada, N. Hashemnia, S. Islam, M. Masoum, "Understanding power transformer frequency response analysis signatures", Electrical determine the degree of similarity and, to find differences Insulation Magazine, IEEE, vol.29, no.3, pp. 48-56 ...
Year: 2015, Volume: 15, Number: 1
... , MG5, MG6 are asked to provide their maximum transformer at a certain instant of time and the actual ... were kept over 0.96 p.u. However starting from the transformers' 80% nominal apparent power capacity with 8th ... original power of all the buses, lines' and transformer's resistances problem (1). Each iteration is ...
Year: 2015, Volume: 15, Number: 1
... realized in the through the grounded neutrals of the power transformer, model, which enables to determine the matrix ... power developed. The calculations were performed in the MATLAB transformers magnetic system [4 ], [10-13] ... . The total installed capacity of the power transformers and autotransformers at the power stations and the transformer substations in ...
Year: 2014, Volume: 14, Number: 3
... currently used in numerous fields, adjustments when the input voltage values vary in the range such as AC motor drives, adjustable AC sources, electric 10%. transformers, output voltage waveform restorers etc. These converters successfully replace alternative voltage variators II. CIRCUIT ANALYSIS using SCRs or TRIACs. Since operation frequencies are Figure 1 ...
Year: 2014, Volume: 14, Number: 3
... @p.lodz.pl 1 Abstract — This article describes the measurement transformer mineral oil or new environmentally friendly techniques used for ... the shapes recorded for mineral oil typically used in power transformers as an insulating medium [2, 3, ... , 9, 10, 12, 15-18]. This confirms that independently on the type of liquid, ...
Year: 2014, Volume: 14, Number: 3
... , because it distorts the regular waveform of the supply. The arcing generates transients, and these transients affect the railway system, including the track circuits, supply transformers, vehicle transformers, and other locomotives. (a) (b) (c) This paper presents a new approach for monitoring the Figure 2. ...
Year: 2014, Volume: 14, Number: 3
... . systems. Pre-condition: System operational conditions before the Example: A solar storm causes an overload in a materialization of the origin of a blackout, including weather transformer which then trips off the transformer, which then conditions, generation and load levels, significant scheduled creates low voltage in the local area. Thus, using ...
Year: 2014, Volume: 14, Number: 3
... , Number 3, 2014 A New Method of Improving Transformer Restricted Earth Fault Protection Jelisaveta P. KRSTIVOJEVIC, ... equal to one half of the signal protection of power transformers against internal faults is period. Also, the ... Number 3, 2014 Case 1: Ground fault outside transformer's protected zone. A fault occurred at the instant ...
90. The Peak Control Function and its Applications to Transmission Line Effects in Class D Amplifiers
Year: 2014, Volume: 14, Number: 3
... 3, by lumping the power 1/T (jω, D) are rational functions, there is a frequency ω0 source, the MOSFET switches and the transformer into the such that (ω0,) can be partitioned into subintervals of voltage source VS. For ease of notation we shall use equal length |2π ...
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