PV mission profile simplification method for power devices subjected to arid climates

Multi-timescale Modelling for Reliability Analysis of Power Electronic-Based Systems

“…This chapter will present the system timescale modelling methods. Two approaches have been developed and published [42,43,44], an event-based modelling method and a mission profile simplification method. The results will be presented, and some applications will be discussed.…”

“…Alternatively, instead of simplifying models to enable simulation of an entire year, the mission profile could be simplified to increase the modelling complexity. This is published in [43] and [44]. Samples of PV mission profiles were inspected for patterns and the following timescale effects were identified:…”

“…The entire year was simulated using a reduced order loss and thermal model. The re-sulting junction temperature profile was analysed using the Rainflow Counting algorithm and the total damage suffered by the system over a year was evaluated using a damage model and the linear damage accumulation assumption [43]. The Rainflow Counting algorithm is used to convert cyclic loading into discrete cycles that can be input into damage or life models, the algorithm will be presented in detail in Section 4.2.1.…”

“…Fig. 3.9: Reduced Order Model for estimation of damage of PV inverter components [43]. Power and ambient profiles are input into the simulation step that results in a device temperature profile.…”

“…The steps of the proposed method for simplification, simulation and reconstruction of arid mission profiles (MP) [43]. The final result is a reconstructed device temperature profile which can be used to evaluate the damage of the input profile.…”