Self-Balanced Nine-Level Flying Capacitor Inverter With Double-Period Level-Shifted Control

Ge, Wentao; Zeng, Jun; Jian-xin, Zhao; Liu, Junfeng

doi:10.1109/jestpe.2023.3267818

Cited by 3 publications

(1 citation statement)

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“…Esses ajustes nas escalas permitem variar as larguras e localizações dos pulsos de comutação, regulando as tensões nos capacitores. Um inversor FC de nove níveis com auto-balanceamento e um método de modulação de duplo período com deslocamento de níveis é apresentado em [25]. Segundo os autores, essa estratégia de modulação alcança equilíbrio automático das tensões dos capacitores, reduz a corrente de carga e possui uma contagem reduzida de capacitores.…”

Section: Introductionunclassified

Modelagem e Controle Das Tensões Dos Capacitores Flutuantes do Inversor com Grampeamento Através de Capacitores Flutuantes

Moritz,

Batschauer,

Da Silva

2023

Eletrônica de Potência

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An active control method to balance the flying capacitor’s voltage is presented for a single-phase full-bridge flying capacitor inverter. Based on the equations of flying capacitors, an analytical method that represents the natural capacitor’s voltage balancing is introduced. In this technique, switches’ duty cycle is modified to control flying capacitor’s voltage using a proportional integrative controller. This method considers that current direction influences the capacitor’s voltage balance. The controller generates small differences between the switches’ duty cycle, which change the charge process of the capacitors. Simulation and experimental implementation results show that the control is efficient, maintaining the capacitor’s voltage regulated. Experimental results of the inverter applied to a photovoltaic system connected to the electrical grid are presented.

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Section: Introductionunclassified