900V SiC Based, Hybrid, Multilevel DC/DC Topology for 1500VDC PV Application

Stevanovic, Branislav and Serrano Lopez, Diego and Vasic, Miroslav and Alou Cervera, Pedro and Oliver Ramirez, Jesus Angel and Cobos Marquez, Jose Antonio (2019). 900V SiC Based, Hybrid, Multilevel DC/DC Topology for 1500VDC PV Application. In: "900V SiC Based, Hybrid, Multilevel DC/DC Topology for 1500VDC PV Application, Anaheim, CA, USA. pp. 6-12.

Description

Title: 900V SiC Based, Hybrid, Multilevel DC/DC Topology for 1500VDC PV Application
Author/s:
  • Stevanovic, Branislav
  • Serrano Lopez, Diego
  • Vasic, Miroslav
  • Alou Cervera, Pedro
  • Oliver Ramirez, Jesus Angel
  • Cobos Marquez, Jose Antonio
Item Type: Presentation at Congress or Conference (Unspecified)
Event Title: 900V SiC Based, Hybrid, Multilevel DC/DC Topology for 1500VDC PV Application
Event Location: Anaheim, CA, USA
Date: 2019
Subjects:
Faculty: Centro de Electrónica Industrial (CEI) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Very compact, highly efficient, hybrid DC/DC topology, consisted of a standard interleaved boost converter followed by a multilevel Resonant Switched Capacitor Converter (RSCC), that employs 900V Silicon-Carbide (SiC) devices, for use in emerging, two-stage, grid connected 1500V Photo-Voltaic (PV) systems is presented in this paper. Operation principle of this topology is described: controllability of its output voltage and power processing distribution among its stages in function of input voltage. Depending on operating region, certain amount of input power is not processed, but it is transfered directly to the output. This behaviour increases significantly efficiency of the analyzed topology, compared to the solutions presented in literature. The presented topology obtains full ZVS transitions in all operating conditions, even without load. ZVS transitions and employed SiC MOSFETs are the key elements for the high converter efficiency. Triangular Conduction Mode (TCM) in boost stage and resonant switching technique in RSCC part are used to obtain ZVS transitions in all the switches under wide range of loads and PV voltages. Results of multivariable optimization (pareto front) for the presented topology are provided. Previousely described theoretical analysis is fully experimentally confirmed by building and measuring a 10kW prototype of 8.26kW/kg of specific power and 404.6cm3 of volume occupied only by power stage components. Euro efficiency of 99.48% in nominal input/output voltage conditions is achieved.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainDPI2017-88505-C2-1-RUnspecifiedUnspecifiedSoluciones óptimas para el procesado de la energía de las nuevas plantas solares de 1500V con conexión a la red eléctrica

More information

Item ID: 54498
DC Identifier: http://oa.upm.es/54498/
OAI Identifier: oai:oa.upm.es:54498
Deposited by: Memoria Investigacion
Deposited on: 27 Feb 2020 09:04
Last Modified: 27 Feb 2020 09:04
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