Performance of Neutral Point Clamped Five Level Inverter Using Space Vector Modulation Control Fed by DPC-VF-SVM Rectifier

Abstract

The purpose of this paper is to develop a control and regulation method for the input DC voltage of a five level neutral point clamping (NPC) inverter feeding a induction motor. In this context, the authors propose in the first part, the control strategy of three-phase pulse width modulation rectifier, they propose the virtual flux-based direct control (DPC_VF) with vector modulation (SVM), this method is applied for the enhancement of network power quality by compensation of harmonic currents produced by an non linear load, and good regulation of DC-bus voltage. The second part of the paper is dedicated to the presentation of the model of the three phase, five-level NPC voltage source inverter with its space vector modulation (SVM) control method. The performance of the proposed strategy in terms of out-put voltage and THD has studied successfully and shown using MATLAB/Simulink.

Sliding Input Output Control of Squirrel Cage Motor Based NPC Five Level Inverter

“…The general structure of the multilevel inverter is to synthesize a sinusoidal voltage from several levels of voltages, typically obtained from capacitor voltage sources. The multilevel NPC inverter starts from three levels [13][14][15][16][17][18][19][20].…”

“…A five -level NPC converter is able to produce five levels of line to line voltage and three levels of phase voltage. This NPC converter reduces harmonics in both voltage and current output [12][13][14][15][16].…”

“…To obtain the five voltage levels, switches are following switching states as shown in Table 1 [16,17].…”

“…The design of a sliding mode controller has two steps, namely, the definition of the adequate switching surface and the development of the control law (equivalent command and discontinuous command). The sliding mode control can offer good properties, such as insensitivity to parameter variations [9][10][11][12][13][14][15][16][17].…”