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Reliability Analysis Framework for a Grid-Tied PV-Battery System: Influence of PV and Battery Degradation on Reliability of Power Electronic Systems
O. Alavi, W. Van De Sande, L. Van Cappellen, W. De Ceuninck, M. Daenen
Battery / Batteries, Lifetime, Time Resolution, Estimation, Mission Profile, Power Devices
PV Applications, Integration and Storage
Subtopic: Power Electronics and Electrical Grid Integration
Event: 38th European Photovoltaic Solar Energy Conference and Exhibition
Session: 6BV.5.4
1449 - 1451
ISBN: 3-936338-78-7
Paper DOI: 10.4229/EUPVSEC20212021-6BV.5.4
0,00 EUR
Document(s): paper, poster


This paper presents a flexible framework to evaluate the reliability of power electronic systems used within a grid-connected PV-battery system. As a practical example to show the capability of this framework, the life consumption (LC) of power semiconductors (IGBTs and diodes) is determined considering both solar panel and lithium-ion battery degradation. Different panel degradation rates can be defined to the framework. The battery degradation is calculated by a closed-loop approach so that the battery degradation is adjusted based on the determined cycling and calendar aging. The outputs are obtained for three cases: (1) no degradation, (2) only PV degradation, and (3) both PV and battery degradation. The results showed that by considering the battery degradation, the battery DC-DC converter’s switches will experience 14% lower LC compared to the case with both PV and battery degradation models, while the switches within the PV inverter have 2.3% higher LC when considering the battery degradation.