Single phase grid connected power converter topologies with power pulsation compensation
Publication Date
December 31, 2020
Creator
Abstract
Following the ever increasing penetration of grid connected distributed generation, EVs battery chargers, and distributed energy storage systems, the requirement for power converter having rated power ranging from 1 to 15kW is rising.
In order to facilitate the introduction of power converters in residential application, \red{including single-phase systems}, high power density is desirable, as long as it does not have significant negative impact on cost and reliability.
The topic of this work is the implementation of new topologies for single phase AC-DC systems. In the first part of the work, a literature review of existing solutions is presented, with focus on active ripple power decoupling and leakage current elimination in transformerless PV systems. \red{Two converter topologies, the Double-Full-Bridge Converter (DFBC) and the Jumping-Capacitor Converter (JCC) are proposed, both able to achieve active ripple power cancellation using the concept of ripple port. The JCC particularly suitable for use as transformerless PV converter, thanks to its leakage currents filtering capability.}
A new modulation technique capable of achieving zero voltage switching without the need for resonating LC circuits is proposed. \red{The modulation takes advantage of the mutual coupling between the magnetic elements of different fundamental cells in order to shape the current ripple waveforms, achieving ZVS with a low ripple amplitude.} The technique can be applied to the proposed topologies but also on many other topologies.
The proposed solutions are validated by simulations and experimental results.
Item Type
ethesis
Thesis Type
PhD
Subjects (LC)
Associated Schools / Departments
Department of Electrical and Electronic Engineering (UK)
eprints ID
63299
UoN Repository URI
Except where otherwise noted, this item's license is described as
File(s)![Thumbnail Image]()
Name
Thesis_Davide_Gottardo.pdf
Type
Full-text
Description
Examined
Size
107.65 MB
Format
Adobe PDF
Checksum (MD5)
68c8fade0525d25ef78749fabc310efc