This paper introduces a new pulse-width-modulation (PWM) -based control technique for 7-level active neutral-point-clamped (A-NPC) flying-capacitor multicell (FCM) inverters. It regulates inverter's output voltage...
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ISBN:
(纸本)9789075815399
This paper introduces a new pulse-width-modulation (PWM) -based control technique for 7-level active neutral-point-clamped (A-NPC) flying-capacitor multicell (FCM) inverters. It regulates inverter's output voltage, current, and balances FCs at reference values. It is realized on basis of active control approach which is achieved using instantaneous measurements taken from inverter, and then being interpreted into the logic quantities. Contrary to space-vector modulation (SVM) and model predictive control (MPC) methods, the proposed solution is deemed a direct approach that excludes cost/objective functions and time/software-consuming optimization processes to generate the switching states. It utilizes the measured values of the FC voltages and load current to derive the logic variables and equations that directly determine the inverter's switching states according to the reference voltage-levels. As its advantage, any commonly used modulators such as phase-shifted-carrier (PSC) or phase-disposition (PD) strategy could be readily embedded into control unit to generate inverter's reference voltage-levels. The experimental results are provided to validate the suggested active balancing technique, its effectiveness and fast execution-time.
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