WSEAS Transactions on Systems
Print ISSN: 1109-2777, E-ISSN: 2224-2678
Volume 13, 2014
Special Issue: Deregulated Electricity Market: Investigation and Solution Methodologies
Editors: S. Prabhakar Karthikeyan, F. Neri Neutral Point Potential Balance of Three Phase Three Level Diode Clamped Inverter
Authors: , ,
Abstract: This paper presents a simple method to control the neutral point potential (NPP) variations in three phase three level diode clamped multilevel inverters and also eliminate imbalance in the dc link. Phase Disposition (PD) PWM technique is used for generating the gate pulse for the switches. Two different controllers are used in this method. One for dc side control and the other is for load side control. The Performance parameters are analyzed for different controllers like PI and Fuzzy Logic controller and the results are summarized in the table. The Circuit is simulated in Matlab/Simulink and the effect of the Total Harmonic Distortion (THD) is analyzed. The simulation result confirms the effectiveness of this method to control the neutral point potential variation.
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Keywords: Multilevel inverter, Phase Disposition (PD), Total Harmonic Distortion (THD), Pulse Width Modulation (PWM), Neutral Point Potential (NPP)
Pages: 575-583
WSEAS Transactions on Systems, ISSN / E-ISSN: 1109-2777 / 2224-2678, Volume 13, 2014, Art. #57