Masike, LebogangGitau, Michael Njoroge2024-05-222024-05-222023-02Masike, L.; Gitau, M.N. A Modular Circuit Synthesis Oriented Modelling Approach for Non-Isolated DC-DC Converters in CCM. Energies 2023, 16, 1047. https://DOI.org/10.3390/en16031047.1996-1073 (online)10.3390/en16031047http://hdl.handle.net/2263/96172DATA AVAILABILITY STATEMENT : All generated data is contained in the manuscript.The continued commissioning of DC microgrids in an effort to achieve net-zero carbon levels in the atmosphere demands the large-scale deployment of converters to make the power from renewable energy sources, such as solar PV, usable. To control these inherently non-linear converters using classical linear control methods, averaged modelling techniques are employed. These methods are laborious and easily become intractable when applied to converters with increased energy storage elements. A modular modelling approach is proposed. This approach is based on the synthesis of converters using refined basic building blocks. The refined basic building blocks are independently modelled as two-port networks and used in a circuit synthesis-oriented manner to derive power stage models of commonly used DC-DC converters. It is found that most of the converters considered in the study can be described as a cascade combination of these basic building blocks. As such, transmission parameters are mainly used to model the two-port networks. Moreover, it is also found that using this modelling technique enables the computation of generalized expressions for all power stage models of interest. The use of two-port networks curtails the size of the matrices describing the basic building blocks to 2 2, and thus simplifies the entire modelling procedure. Additionally, two-port network analysis makes this modelling technique modular, thus making it more suited to be employed in DC microgrids. The independence of the two-port models on the circuit topology and functionality makes it possible to even model new converters containing the described basic building blocks solely based on circuit connection.en© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.Two-port networksDC-DC converter analysisConverter building blocksConverter cellsSmall-signal modellingBasic building blocksDC microgridsTransmission parametersSDG-09: Industry, innovation and infrastructureArticle