Analysis and Comparison of Power Electronic Converters with Electronic Isolation

 
 
Kassel University Press
  • 1. Auflage
  • |
  • erschienen am 23. Februar 2015
  • |
  • 166 Seiten
 
E-Book | PDF ohne DRM | Systemvoraussetzungen
978-3-86219-823-8 (ISBN)
 
With the continual increase in the global energy consumption, grows the demand on the power capacity, efficient production, distribution and utilization of the electrical energy generated. The role of power electronics in such contexts has been of great importance not only for the traditional power generator systems but also for the decentralized renewable energy generation, like solar and wind power.
Several innovations can be observed in the field of power systems for renewable energy sources based on power electronics. Improvements can be identified regarding for example control techniques, semiconductor devices, electromagnetic components and also topologies. Such developments allow specific application requirements to be fulfilled with lower levels of losses and less material expenditure.
In this thesis, power electronic topologies are analyzed with respect to the type of electrical isolation between the input and output, which may differ in three ways: galvanic, capacitive and electronic. Among the above requirements, "galvanic isolation" is a major issue in photovoltaic applications, not only due to regulations concerning the grounding of PV modules but also because of compatibility requirements of new cell technologies.
Within this framework, a theoretical and practical examination on new inverter topologies is investigated with electronic isolation method in order to meet the targeted future challenge aspects.
  • Englisch
  • Kassel
  • |
  • Deutschland
  • 6,12 MB
978-3-86219-823-8 (9783862198238)
3862198235 (3862198235)
10.19211/KUP9783862198238
weitere Ausgaben werden ermittelt
  • Front cover
  • Series title
  • Title page
  • Imprint
  • Foreword
  • Summary
  • Zusammenfassung
  • Contents
  • 1 General Introduction
  • 1.1 Background and motivation
  • 1.2 Power electronic systems
  • 1.3 What does electrical isolation actually mean?
  • 1.4 Aim of study
  • 1.5 Outline of thesis
  • 2 State-of-the-Art
  • 2.1 Semiconductor technologies
  • 2.2 Passive components
  • 3 Investigation on Power Electronic Topologies with respect to Isolation Art
  • 3.1 Introduction
  • 3.2 Analysis of isolation techniques in power electronic topologies
  • 3.3 Photovoltaic system technologies
  • 3.3.1 PV generator stage
  • 3.3.2 PV inverter stage
  • 3.3.3 Grid stage
  • 3.4 Potential differences at PV system
  • 3.5 Topological classification of PV inverters
  • 3.5.1 Grid-connected PV topologies with isolating transformer
  • 3.5.2 Grid-connected transformerless PV topologies
  • 3.6 Conclusion
  • 4 Analysis of Proposed Topology
  • 4.1 Introduction
  • 4.2 Theoretical analysis
  • 4.3 Circuit analysis
  • 4.4 Operation stages
  • 4.4.1 Buck mode
  • 4.4.2 1:1 Mode
  • 4.4.3 Boost mode
  • 4.5 Current and voltage stress on switches
  • 4.6 Operation scenarios
  • 4.7 Control system
  • 4.8 Coupled inductor
  • 4.8.1 Structure and functioning of coupled inductor
  • 4.8.2 Coupled inductor model
  • 4.8.3 Magnetic field structure
  • 4.8.4 Magnetic circuit
  • 4.4.2 Transformation of magnetic and electrical circuits
  • 4.9 Summary
  • 5 Inverter Design and Specifications
  • 5.1 Boundary conditions
  • 5.2 Coupled inductor design
  • 5.2.1 First estimations for core size
  • 5.2.2 First selection for core sizes
  • 5.2.3 All parameters for design decisions
  • 5.2.4 Definition of parasitic effects
  • 5.2.5 Calculation of coupled inductor losses and temperature
  • 5.2.6 Selected coupled inductors
  • 5.2.7 Verification of design areas
  • 5.3 Simulation of proposed circuit
  • 5.4 Summary
  • 6 Comparison between Selected Topologies
  • 6.1 Definition of loss indicators
  • 6.2 Galvanic isolated topology
  • 6.3 Capacitive isolated topology
  • 6.4 Electronic isolated topology
  • 6.5 Comparison of total RMS current indicators
  • 6.6 Comparison of switching stress indicators
  • 6.7 Conclusion
  • 7 Practical Implementation
  • 7.1 Hardware
  • 7.2 Coupled inductors
  • 7.3 Software
  • 7.4 Measurement results
  • 7.4.1 Boostmode (D
  • 7.4.2 Buck mode (D
  • 7.4.3 Output stage
  • 7.4.4 Grounding possibility
  • 7.5 Measurement results
  • 7.6 Summary
  • 8 General Conclusions and Future Outlook
  • 8.1 Theoretical level
  • 8.2 Application level
  • 8.3 Suggestions for future work
  • Bibliography
  • Symbols and Abbreviations
  • List of the Figures
  • List of the tables
  • Back cover

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