tailieunhanh - A review of multilevel inverter topology and control techniques

This paper focused on reviewing the main types of topologies and control strategies employed for the operation of multilevel inverter. Advantages and disadvantages of the topologies and the control techniques in relation to one another are equally reviewed. | Journal of Automation and Control Engineering Vol. 4, No. 3, June 2016 A Review of Multilevel Inverter Topology and Control Techniques 2 1 1 Gaddafi Sani Shehu, 1 Abdullahi Bala Kunya, Ibrahim Haruna Shanono, and Tankut Yalcinoz Department of Electrical and Electronics Engineering, Mevlana University, Konya, 42003, Turkey 2 Department of Electrical and Engineering, Bayero University Kano PMB 3011, Nigeria Email: sanishehu03@, abkunya@, ihshanono@, tyalcinoz@ 1 Abstract—This paper focused on reviewing the main types of topologies and control strategies employed for the operation of multilevel inverter. Advantages and disadvantages of the topologies and the control techniques in relation to one another are equally reviewed. Recent proposed methods employed to improve the harmonic performance, reduce electromagnetic interference (EMI), lower stress on the power switches, eliminate DC link voltage imbalance and simplify the pulse width modulation control algorithms are fully reviewed. Selective harmonic elimination modulation technique is used in generating the 11-level of output voltage. It is aimed at reducing the total harmonic distortion as low as possible. Index Terms—harmonic distortion, multilevel inverter, modulation techniques, topology I. INTRODUCTION The concept of multilevel inverters (MLI) has been introduced since mid-1970. The term multilevel originated with the three-level inverter. Subsequently, several multilevel inverter topologies continue to emerge, especially in the last two decades. They are powerconversion systems composed by an array of power semiconductors and DC voltage sources that, when appropriately connected and controlled, can generate a multiple-step voltage waveform with variable and controllable frequency, phase and amplitude [1]. The staircase voltage waveform is synthesized by selecting different voltage levels generated by the proper connection of the load to the different DC .