Study on a cascaded DC-DC converter for use in building-integrated photovoltaics

Ravyts, Simon; Vecchia, Mauricio Dalla; Zwysen, Jeroen; Broeck, Giel Van den; Driesen, Johan

doi:10.1109/tpec.2018.8312087

Cited by 21 publications

(14 citation statements)

References 11 publications

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“…In [81][82][83][84] a two stage topology is presented that consists of an (interleaved) boost converter cascaded with a Series Resonant Full Bridge (SR FB) converter. The advantage is that the Maximum Power Point Tracking (MPPT) and the high step up are decoupled, allowing operating the SR FB with a constant switching frequency, which relaxes the constraints on the transformer design [81].…”

Section: Initial Design-converter Topology Selectionmentioning

confidence: 99%

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

et al. 2020

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State-of-the-art reliability assessment typically starts from a given circuit topology, for which the most suitable components are selected using a Physics of Failure analysis. This paper, however, addresses the topology selection stage, which is the foundation in designing reliable converters. Based on an overview of the reliability performance of different components, a methodology is presented as a guideline for comparing topologies to one another. The focus is directed at practical consequences associated with certain designs. Furthermore, an overview is provided on the latest developments in component technology reliability improvements. The developed methodology is mainly intended for demanding applications, where long lifetimes are required or elevated ambient temperatures are present. After the topology selection, an overview of possibilities is given that allows further increasing converter availability. Finally, the methodology is applied to the design of module level converters for building integrated photovoltaics, which is a high temperature application with a high desired lifetime. A prototype and experimental results are presented.

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Section: Initial Design-converter Topology Selectionmentioning

confidence: 99%

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

et al. 2020

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“…The use of PPOs for BIPV has first been reported by Reference [43], where a 200-V DC bus was used. The same approach was adopted by References [93][94][95], but a 380-V DC bus was employed. The reliability aspects concerning the embedment of this converter in the frame of a BIPV curtain wall element were treated in Reference [96].…”

Section: Power Optimizersmentioning

confidence: 99%

Review on Building-Integrated Photovoltaics Electrical System Requirements and Module-Integrated Converter Recommendations

et al. 2019

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Since building-integrated photovoltaic (BIPV) modules are typically installed during, not after, the construction phase, BIPVs have a profound impact compared to conventional building-applied photovoltaics on the electrical installation and construction planning of a building. As the cost of BIPV modules decreases over time, the impact of electrical system architecture and converters will become more prevalent in the overall cost of the system. This manuscript provides an overview of potential BIPV electrical architectures. System-level criteria for BIPV installations are established, thus providing a reference framework to compare electrical architectures. To achieve modularity and to minimize engineering costs, module-level DC/DC converters preinstalled in the BIPV module turned out to be the best solution. The second part of this paper establishes converter-level requirements, derived and related to the BIPV system. These include measures to increase the converter fault tolerance for extended availability and to ensure essential safety features.

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“…Reviews on nonisolated topologies can be found in [4,5]. In previous work, a cascade of an interleaved boost converter and an isolated full bridge converter using wide-bandgap (WBG) components was proposed and experimentally tested [6,7,8]. However, the overall efficiency was considered too low and the component temperature increase too high.…”

Section: Electrical Modelmentioning

confidence: 99%

A mission profile-based reliability analysis framework for photovoltaic DC-DC converters

Sande

Ravyts

Sangwongwanich

et al. 2019

Microelectronics Reliability

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Reliability of DC-DC converters is important in photovoltaic (PV) applications like building integrated PV systems, where the module-level converter may be stressed significantly. Understanding and predicting the most failing components with accurate degradation models in such systems enables the design for reliability. In this paper, a photovoltaic mission profile-based reliability analysis framework is proposed where the inputs and models of the framework can be adjusted according to the converter topology, the components and the failure mechanisms under investigation. The framework is demonstrated by comparing the influence of two different one-year mission profiles on the solder joint degradation of a MOSFET in an interleaved boost converter. This is done by using an electro-thermal circuit simulation in PLECS and a finite element MOSFET model in COMSOL. In future work, the mesh and the geometry of the solder joint can be adjusted to more closely match the practical stress-cycle (S-N) curve used to determine the lifetime. This framework allows for exploring more accurate models or even simplify parts with low sensitivity in order to obtain a thorough understanding of their accuracy and to determine the overall converter reliability.

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Study on a cascaded DC-DC converter for use in building-integrated photovoltaics

Cited by 21 publications

References 11 publications

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

Review on Building-Integrated Photovoltaics Electrical System Requirements and Module-Integrated Converter Recommendations

A mission profile-based reliability analysis framework for photovoltaic DC-DC converters

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