Author: "Carcar, Ainhoa" / Language: english - Searchworks@Jio Institute Digital Library Search Results

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Author: Chivite-Zabalza, Javier, Girones, Carlos, Carcar, Ainhoa, Larrazabal, Igor, Olea, Eneko, and Zabaleta, Mikel
Abstract: This paper presents a comprehensive comparison of five commercially viable configurations to achieve a wind turbine conversion system of 6 MW, suitable for off-shore applications. These comprise Full Converter (FC) and Doubly Fed Induction Generator (DFIG) types with several redundancy levels. The power conversion lines are implemented using standard Power Electronic Building Blocks (PEBB) or Basic Power Modules (BPM) that allow a wide range of combinations. The BPMs use Insulated Gate Bipolar Transistor (IGBT) technology of either, Low Voltage (LV) or Medium Voltage (MV) levels. The options are described in the paper, and are compared against several key features such as output voltage, price, volume, weight, power density, semiconductor supply chain, grid-side filter, overall supply chain, efficiency, grid code compliance, redundancy, cooling and maintenance. The generator technology is also considered in the study. [ABSTRACT FROM PUBLISHER]
Published: 2013
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Author: Solas, Estibaliz, Abad, Gonzalo, Barrena, Jon Andoni, Aurtenetxea, Sergio, Carcar, Ainhoa, and Zajac, Ludwik
Subjects: PULSE width modulation, ELECTRONICS, THERMAL analysis, BIPOLAR transistors, CAPACITORS
Abstract: This paper is the continuation of part I in which a modulation strategy for the modular multilevel converter, which provides voltage balancing of the capacitors of different submodules comprising the converter, is presented. Here, the validation of the studied modulation strategy is carried out by means of successful experimental results in a downscaled real test bench. First, the converter submodules are 2L topologies, and then the connections are changed to configure 3L-FC submodules showing the effectiveness and implementability of the proposed modulation in different submodule concepts. Finally, a comparison based on thermal analysis and sizing of elements among 2L, 2L serializing several insulated gate bipolar transistors per valve, 3L-FC, and 3L-NPC submodule concepts is made. [ABSTRACT FROM PUBLISHER]
Published: 2013
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Author: Solas, Estibaliz, Abad, Gonzalo, Barrena, Jon Andoni, Aurtenetxea, Sergio, Carcar, Ainhoa, and Zajac, Ludwik
Subjects: CAPACITORS, PULSE width modulation, THERMAL analysis, ELECTRIC equipment, ELECTRONICS
Abstract: This paper presents a modulation strategy for the modular multilevel converter (MMC) which provides the voltage balancing of the capacitors of different submodules comprising the converter. Not only is this modulation applicable to MMCs constructed with classic two level (2L) submodules, but it is also effective for arrangements with different submodule concepts, for instance, topologies like neutral point clamped (NPC), flying capacitors (FCs), neutral point piloted (NPP), etc. Therefore, firstly, the general modulation philosophy is explained applied to the two level (2L) submodule concept, and secondly, the extension to 3L-NPC and 3L-FC submodule topologies is analyzed. After that, the validation of the studied modulation strategy is carried out by means of successful simulation results, at different switching frequencies and number of submodules. The corresponding experimental results are shown in Part II of this paper after having implemented the aforementioned modulation strategy in a real test bench. In addition to this, a comparison based on thermal analysis and sizing of elements among the four studied submodule topologies is also included. [ABSTRACT FROM PUBLISHER]
Published: 2013
Full Text: View/download PDF

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