3-phase 19-level T-type Multilevel Inverter Based Low Total Harmonic Distortion

Main Article Content

Pairote Thongprasri

Abstract

A good multilevel inverter design, the output voltage waveform must be a staircase waveform that the step voltage is on the sinusoidal waveform referenced at all levels. As a result is a low total harmonic distortion. Multilevel inverter with high levels is controlled by a space vector method. The output waveform at the high staircase level is outside the sinusoidal waveform referenced resulting in a high harmonic distortion. This paper presents a 3-phase 19-level T-type multilevel inverter which is controlled by adjusting vector position of a space vector method. In order to control the step voltage to be on the sinusoidal waveform referenced at all levels; the vector has been adjusted 18 positions from the original position. The position of the vector indicates the DC link voltage of the 3-phase inverter used for the design which has the position of the switching angle of all 54 switches. The experimental results, a 3-phase induction motor with 4 poles rated ¼ HP is driven by the proposed 3-phase 19- level T-type multilevel inverter. The multilevel inverter produces the total harmonic distortion of the voltage and current at 4.1% และ 1.1%, respectively.

Article Details

How to Cite
Thongprasri, P. (2019). 3-phase 19-level T-type Multilevel Inverter Based Low Total Harmonic Distortion. Frontiers in Engineering Innovation Research, 17(2), 189–203. Retrieved from https://ph01.tci-thaijo.org/index.php/jermutt/article/view/241915
Section
Research Articles

References

Yang JH, Le TV, Ibadullaev A, Park SJ. A study of TNPC type single-phase 5-level inverter for energy storage system. ITEC Asia-Pacific, 2016;346-350.

Rodriguez J, Lai JS, Peng FZ. Multilevel inverters: a survey of topologies, controls, and applica-tions. IEEE Transactions on Industrial Electronics, 2002;49(4); 724-738.

Edpuganti A, Rathore AK. Fundamental switching frequency optimal pulse width modulation of medium-voltage cascaded seven-level inverter. IEEE Transactions on Indus-try Applications. 2015;51(4);3485–3492.

Du Z, Tolbert LM, Ozpineci B, Chiasson JN. Fundamental frequency switching strategies of a seven-level hybrid cascaded H-bridge multilevel inverter. IEEE Transactions on Power Electro-nics. 2009;24(1);25-33.

Hu P, Jiang D. A level-increased nearest level modulation method for modular multilevel converters. IEEE Transactions on Power Electronics. 2015;30(4);1836–1842.

Gao L, Fletcher JE. A space vector switching strategy for three-level five-Phase inverter drives. IEEE Transactions on Industrial Elec-tronics. 2010;57(7);2332-2343.

Ahmed M, Sheir A, Orabi M. Real-time solution and implementation of selective harmonic elimination of seven-Level multilevel inverter. IEEE Journal of Emerging and Selected Topics in Power Elec-tronics. 2017;5(4);1700-1709.

Alnamer SS, Mekhilef S, Mokhlis H. Proposed new N-multilevel family of topologies for T-type inverter. IEICE Electronics Express. 2017;14 (15);1-11.

Masaoud A, Ping HW, Mekhilef S, Taallah AS. New three-phase multilevel inverter with reduced number of power electronic components. IEEE Transactions on Power Electro-nics. 2014;29(11);6018-6029.

Masaoud A, Ping HW, Mekhilef S, Taallah AS. New three-phase multilevel inverter with reduced number of power electronic components. IEEE Transactions on Power Electro-nics. 2014;29(11);6018-6029.