Title :
A neutral-point potential control method for three-level inverters by injecting zero-sequence voltage
Author :
Jinghua, Zhou ; Huichen, Liu ; Xiaowei, Zhang ; Zhengxi, Li
Author_Institution :
Power Electron. & Motor Drives Eng. Center, North China Univ. of Technol., Beijing, China
Abstract :
The imbalance of neutral-point potential is an internal problem with three-level inverters. To solve this problem, this paper proposes a novel neutral-point potential control method by injecting zero-sequence voltage, and gives the valid criteria for selecting which zero-sequence voltage to use. Simulations and experiments validate that the imbalance of neutral-point potential could be controlled effectively at various states of the inverter by using this method, and this control method is simple and easy and is robust.
Keywords :
Capacitors; Electric potential; Integrated circuits; Inverters; Modulation; Switches; Voltage control; neutral-point potential control; the selection rule; three-level inverter; zero-sequence voltage;
Conference_Titel :
Power Electronics for Distributed Generation Systems (PEDG), 2010 2nd IEEE International Symposium on
Conference_Location :
Hefei, China
Print_ISBN :
978-1-4244-5669-7
DOI :
10.1109/PEDG.2010.5545817
