Influence of Power Cycle On-State Duration on the Lifetime of Power Module Die-Attach Layers

Acuna, Javier; Rupp, Thomas; Sonner, Marcus; Klingler, Markus; Metais, B.; Kallfass, Ingmar

doi:10.1109/therminic.2019.8923678

Cited by 1 publication

(1 citation statement)

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“…Scheuermann et al [7] presented a lifetime model to predict the accumulated fatigue of semiconductor bond wires. Similar lifetime models were used in [6,[8][9][10][11][12][13]. This lifetime model of semiconductors has the potential to be extended to grid-level simulations and incorporated into reliability studies.…”

Section: Introductionmentioning

confidence: 99%

Fast Quasi-Static Time-Series Simulation for Accurate PV Inverter Semiconductor Fatigue Analysis with a Long-Term Solar Profile

et al. 2022

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Power system simulations with long-term data typically have large time steps, varying from one second to a few minutes. However, for PV inverter semiconductors in grid-connected applications, the minimum thermal stress cycle occurs over the fundamental grid frequency (50 or 60 Hz). This requires the time step of the fatigue simulation to be approximately 100 μs. This small time step requires long computation times to process yearly power production profiles. In this paper, we propose a fast fatigue simulation for inverter semiconductors using the quasi-static time-series simulation concept. The proposed simulation calculates the steady state of the semiconductor junction temperature using a fast Fourier transform. The small thermal cycling during a switching period and even over the fundamental waveform is disregarded to further accelerate the simulation speed. The resulting time step of the fatigue simulation is 15 min, which is consistent with the solar dataset. The error of the proposed simulation is 0.16% compared to the fatigue simulation results using the complete thermal stress profile. The error of the proposed method is significantly less than the conventional averaged thermal profile. A PV inverter that responds to a transactive energy system is simulated to demonstrate the use of the proposed fatigue simulation. The proposed simulation has the potential to cosimulate with system-level simulation tools that also adopt the quasi-static time-series concept.

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