期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 65, 期 10, 页码 8297-8306出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2018.2814020
关键词
Impedance-source (IS) converters; multilevel; pulse width modulation (PWM) inverters; T-type inverter; three-level T-type quasi-impedance-source inverter; (3L-T-type qZSI); voltage imbalance
资金
- Junta de Extremadura
- Ministerio de Economia, Industria y Competitividad from Spain
- Iberica Semiconductores de Potencia S.L.
- Fuji Electric Company
This paper presents a modified carrier level-shifted based control method for a pulsewidth modulation controlled three-phase three-level T-type quasi-impedance-source inverter. The benefits of the proposed strategy are a uniform distribution of shoot-through states of constant width throughout the fundamental period and the mitigation of the inner capacitors' voltages imbalance. The latter is achieved by means of a proportional-integral controller, which adjusts the relative time application of redundant states. The improved performance is demonstrated in terms of reliability, as the capacitors do not suffer from neutral-point imbalance. The control method can also be implemented in a different multilevel inverter configuration with an impedance-source network. A comprehensive simulation study and several experiments were performed in order to validate the adopted method in situations of imbalanced capacitor voltages.
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