Comparative Study of IGBT Lifetime Damage in Photovoltaic Inverters Under Different MPPT Control Methods
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...