5-Level multiple-pole multilevel diode-clamped inverter scheme for reactive power compensation

This paper proposes a space vector modulation based dc-link capacitor voltage balancing technique for a 5-level multiple-pole multilevel diode-clamped (M2DCI) inverter. The new 5-level inverter contains lesser number of clamping diodes compared to the conventional 5-level diode-clamped inverter (DCI) topology and does not require any extra balancing circuits to maintain balanced voltages across the four dc-link capacitors. The effect of load power factor and modulation indices on voltage balancing strategy has been studied, and the stability region for 5-level M2DCI is determined based on investigation done in the Matlab/Simulink® and PSIM environment during balanced, unbalanced and distorted load conditions.

[1]  Fei Wang,et al.  Sine-triangle vs. space vector modulation for three-level PWM voltage source inverters , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[2]  Mark Sumner,et al.  Neutral point control for multi-level inverters: theory, design and operational limitations , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[3]  P. Enjeti,et al.  Optimal power control strategies for neutral point clamped (NPC) inverter topology , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[4]  Bin Wu,et al.  Recent Advances and Industrial Applications of Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[5]  Mark Sumner,et al.  The investigation and development of a multi-level voltage source inverter , 1996 .

[6]  Ali I. Maswood,et al.  Average and hysteresis current-controlled three-phase three-level unity power factor rectifier operation and performance , 2011 .

[7]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.

[8]  Reza Iravani,et al.  Analysis and Control of DC-Capacitor-Voltage-Drift Phenomenon of a Passive Front-End Five-Level Converter , 2007, IEEE Transactions on Industrial Electronics.

[9]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..