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Search results for: transformer
158 results found.
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Year: 2015, Volume: 15, Number: 4
... 1F- vdc Vienna topology (M =1 ), the most popular PWM boost-type PFC concept with three voltage levels. By adding auxiliary Filter/ PWM PWM Transformer/ active power device(s) to 1F-Vienna circuit and through proper Rectifier Inverter Grid modulation strategies, the ripple frequency present in the input (a) ...
Year: 2015, Volume: 15, Number: 4
... excitation systems and Load Positive sequence of Real power, reactive Line governors. The transformer between buses 11 and 12 is buses voltage and current power breaker status modified ... burden; (ii) the novel application of measurement-based Changer (ULTC) of transformers, the operation of Over- clustering approach for voltage stability studies; ( ...
Year: 2015, Volume: 15, Number: 3
... ] B.S. Dupczak, A.J. Perin, M.L. Heldwein, "Space vector modulation http://dx.doi.org/10.1109/TIE.2008.924160 strategy applied to interphase transformers-based five-level current [15] J. Dai, D. Xu, and B. Wu, "A Novel control scheme for current- source inverters, ...
Year: 2015, Volume: 15, Number: 3
... components are (14) and (15) respectively, The main parts of the schematic diagrams are the power supply, consisting in a 230/24 V transformer, the nonlinear load fed by the rectifier G2, voltage and current transducers 101 Advances in Electrical and Computer Engineering Volume 15, Number 3, 2015 U1 ...
Year: 2015, Volume: 15, Number: 3
... ] To estimate the iron-loss resistance values, several periodic experiments were performed. In this case, the dc m 0.5 supply voltage U dc was acquired by an autotransformer and a 3-phase diode bridge rectifier, whereas the residual ac 0 0 100 200 300 400 500 600 700 800 900 component was filtered out by means of ...
Year: 2015, Volume: 15, Number: 3
... Advances in Electrical and Computer Engineering Volume 15, Number 3, 2015 Verification of Transformer Restricted Earth Fault Protection by using the Monte Carlo Method Jelisaveta P. KRSTIVOJEVIC ... the remanent flux pattern [28]. The remanent flux in cores of three-phase transformers Figure 3. The method of determining the parameters U s and S from ...
Year: 2015, Volume: 15, Number: 3
... PCB traces. from the secondary of the 4-kVA three-phase transformer During the testing procedure we have learned that the ... A part of the laboratory setup. The bulky three-phase transformers 0.02 are not shown. P D2 [W ... variable care should be taken when designing the converter PCB autotransformer. The primary of the variable layout in order ...
Year: 2015, Volume: 15, Number: 3
... correspond to the transient occurrences analyzed later in the where Le is equivalent generator and transformer inductance. paper. From the equations 1-8 follows that the accuracy of the ... , the appearance of harmonics, time presentations of four characteristic switching surges overload of transformers, significant neutral line currents were recorded: energization of an unloaded 35 kV ...
Year: 2015, Volume: 15, Number: 2
... to maximum power tracking via the current sensor, a line-commutated inverter module, a reference current instead of the firing angle. In addition, controller, and step-up transformer, which is shown in power factor can be controlled by changing firing angle of Fig. 3. Moreover, operating principle with switching SCRs. Thus, ...
Year: 2015, Volume: 15, Number: 2
... , M. Vakilian, E. Rahimpour, "A New Method for granularities from its coarse-grained structure are of large Detection and Evaluation of Winding Mechanical Faults in Transformer through Transfer Function Measurements", Advances in dimensions that those from the current steel block. Electrical and Computer Engineering, pp. 23-30, Vol. 11 ...
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