Journal
ISA TRANSACTIONS
Volume 123, Issue -, Pages 482-491Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.isatra.2021.05.017
Keywords
Capacitor voltage estimation; Flying capacitor converter; Multilevel converter; Petri Nets
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This paper presents an estimation method for capacitor and input voltages in Flying Capacitor Multilevel Converters (FCMC) using output current and voltage measurements. The estimation process is represented as a Petri Net, simplifying hardware and allowing real-time implementation in high-level systems.
This paper presents an estimation method for the capacitor and input voltages in Flying Capacitor Multilevel Converters (FCMC). The scheme uses only the output current and voltage measurements. Furthermore, the estimation scheme is represented as a Petri Net, allowing a compact and formal approach to represent the estimation process. This scheme simplifies the needed hardware by using only one voltage sensor, simplifying its associated electronics and communication channels, allowing its real-time implementation in systems with a high number of levels. Simulation and experimental results obtained with a nine-level FCMC current-controlled chopper are presented. The converter control loops use the estimates. Different operating conditions are used to evaluate the system, verifying that the estimation scheme can successfully replace the (n-1) needed voltage sensors with only one. (c) 2021 ISA. Published by Elsevier Ltd. All rights reserved.
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