Harmonic Elimination and Optimization of Stepped Voltage of Multilevel Inverter by Bacterial Foraging Algorithm

다국어 초록 (Multilingual Abstract)

A new family of DC to AC converters, referred to as multilevel inverter, has received much attention from industries and researchers for its high power and voltage applications. One of the conventional techniques for implementing the switching algorithm in these inverters is optimized harmonic stepped waveform (OHSW). However, the major problem in using this technique is eliminating low order harmonics by solving the nonlinear and complex equations. In this paper, a new approach called the "bacterial foraging algorithm" (BFA) is employed. This algorithm eliminates and optimizes the harmonics in a multilevel inverter. This method has higher speed, precision, and convergence power compared with the genetic algorithm (GA), a famous evolutionary algorithm. The proposed technique can be expanded in any number of levels. The purpose of optimization is to remove some low order harmonics, as well as to ensure the fundamental harmonic retained at the desired value. As a case study, a 13-level inverter is chosen. The comparison results by MATLAB software between the two optimization methods (BFA and GA) have shown the effectiveness and superiority of BFA over GA where convergence is desired to achieve global optimum.

목차 (Table of Contents)

• Abstract
• 1. Introduction
• 2. Multilevel Inverters
• 3. Bacterial Foraging Algorithm
• 4. Implementation
• 5. Conclusion
• References

참고문헌 (Reference)

1 Flourentzou, N, "VSC-Based HVDC Power Transmission Systems: An Overview" 24 (24): 592-602, 2009

2 El-Naggar, K, "Selective harmonic elimination of new family of multilevel inverters using genetic algorithms" 49 (49): 89-95, 2008

3 Tianhao, Tang, "Selective Harmonic Elimination for a Cascade Multilevel Inverter" 977-981, 2006

4 Zhong, Du, "Reduced Switching-Frequency Active Harmonic Elimination for Multilevel Converters" 455 : 1761-1770, 2008

5 Kaviani, A, "PSO, an effective tool for harmonics elimination and optimization in multilevel inverters" 2902-2907, 2009

6 McGrath, B.P, "Natural Capacitor Voltage Balancing for a Flying Capacitor Converter Induction Motor Drive" 24 (24): 1554-1561, 2009

7 J. Rodriguez, "Multilevel inverters: a survey of topologies, controls, and applications" 49 (49): 724-738, 2002

8 Rodriguez, J, "Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives" 54 (54): 2930-2945, 2007

9 Ozpineci, B, "Harmonic optimization of multilevel converters using genetic algorithms" 3 (3): 92-95, 2005

10 Barkati, S, "Harmonic elimination in diode-clamped multilevel inverter using evolutionary algorithms" 2008

11 Barkati, S, "Harmonic elimination in diode-clamped multilevel inverter using evolutionary algorithms" 2008

12 Akbari, H, "Harmonic Distortion Minimization in Multilevel Converters for a Wide Range of Modulation Indexes" 581-586, 2007

13 Zhong, Du, "Fundamental Frequency Switching Strategies of a Seven-Level Hybrid Cascaded H-Bridge Multilevel Inverter" 24 (24): 25-33, 2009

14 Hosseini-Aghdam, M.G, "Elimination of Harmonics in a Multilevel Inverter with Unequal DC Sources Using the Homotopy Algorithm" 578-583, 2007

15 Farokhnia, N, "Direct Nonlinear Control for Individual DC Voltage Balancing in Cascaded Multilevel DSTATCOM" 1-8, 2009

16 Yousefpoor, N, "Developed Single-Phase OMTHD Technique for Cascaded Multilevel Inverter By Considering Adjustable DC Sources" 1-6, 2009

17 Yousefpoor, N., "Application of OHSW Technique in Cascaded Multilevel Inverter with Adjustable DC Sources" 1-6, 2009