Aug 2026· 2026 IEEE International Conference on Mechatronics and Automation (ICMA)· pp. 382-387· 0 citations· 15 references
Abstract
To address thermal-fatigue damage in power devices of photovoltaic inverters, this paper investigates a three-phase photovoltaic inverter and establishes a fourth-order Foster thermal-network model based on IGBT power-device parameters. Five MPPT control methods, namely fixed duty cycle, fixed-step perturb and observe (P&O), adaptive-step P&O, incremental conductance (INC), and constant voltage (CV), are simulated and compared. Junction-temperature time-series data are collected, and rainflow counting is used to extract the junction-temperature swing, mean junction temperature, and cycle count. A relative Miner damage index is then adopted to compare thermal-fatigue differences under different MPPT control methods. The simulation results show that, compared with the fixed-duty-cycle case, the lifetime damage ratio under different MPPT control methods ranges from 1.136 to 1.147. Among the MPPT cases, the CV method produces the lowest lifetime damage, whereas the fixed-step P&O method produces the highest lifetime damage. The results provide a theoretical basis and an analysis method for IGBT lifetime-oriented optimization of photovoltaic inverters.
To address junction-temperature fluctuations and thermal-fatigue degradation of IGBT modules in EV traction inverters under CLTC conditions, this study develops a hierarchical active thermal-management framework. A temperature-dependent loss model coupled with a fourth-order Foster thermal network is first established...
Four-Switch mode Three-Phase (FSTP) inverter is considered as an advanced inverter structure to diminish the price, complication, dimension and losses during its switching. The traditional FSTP inverter usually achieves merely buck DC-AC type conversion and highest voltage of the FSTP structured inverter is same as V/2...
A. Vikram, R. R. Kumar, R. Navaneeth et al.· Journal of Science & Technol...· 0 citations
This article analyzes dead-time effects in the full-bridge inverter topology with constant common-mode voltage (FB-CCV) for transformerless grid-connected photovoltaic (PV) applications and proposes a modulation strategy to mitigate the resulting output-voltage distortions, common-mode transients, and power losses. Alt...
Arnaldo O. Cunha, Filipe A. da C. Bahia, J. P. R. A. Méllo et al.· IEEE Open Journal of the Ind...· 0 citations
This paper focuses on reducing switching losses and stresses in photovoltaic (PV) inverters by introducing a new five-level hybrid T-type multilevel inverter (T-MLI). The proposed topology was designed and simulated using physical security information management (PSIM) software and validated using one year of solar rad...
N. Patel, R. Patel· International Journal of Adv...· 0 citations
In the context of high-penetration distributed photovoltaic generation in low-voltage distribution networks, photovoltaic inverters have evolved from single power conversion devices into key equipment for power quality regulation, grid support, and intelligent operation and maintenance. This paper reviews the literatur...
Xizhao Weng· Applied and Computational En...· 0 citations
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