The DC-link Voltage Balancing of the Three-Level T-type Inverter Using the Predictive Control

예측제어를 이용한 T-형 3-레벨 인버터의 중성점 전압제어

  • Received : 2015.10.07
  • Accepted : 2016.01.13
  • Published : 2016.02.01


This paper is a study on the neutral point voltage balancing of the three-phase 3-level T-type inverter using the predictive control techniques. Recently, multi-level inverter has been attracting attention as the advantages such as efficiency improving and harmonic reduction. Especially, the T-type inverter topology is advantageous in low DC-link voltage. However, in case of the prediction control, it takes a lot of time, because there exist 27 voltage vectors and it has to be calculated according to the respective voltage vectors. Therefore, in this paper, we propose a method to implement predictive control techniques while reducing the operation time. In order to reduce the operation time, the predictive control is implemented by using the minimum voltage vector except for the unnecessary voltage vector. The result of the implemented predictive control is added to the SPWM by using the offset voltage. It was verified through simulation and experimental results.


3-Level inverter;T-type inverter;Voltage balancing;Predictive control


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Grant : 클린 및 농식품물류센터를 위한 에너지 절약형 전력변환장치 상용화 개발

Supported by : 경기도지역협력연구센터(GRRC)