A new multilevel STATCOM based on cascaded two level inverters

Author

Babu, N. N V Surendra ; Apparao, D. ; Fernandes, B.G.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol. Bombay, Mumbai, India

fYear

2011

fDate

11-13 May 2011

Firstpage

1

Lastpage

6

Abstract

In this paper a new multilevel STATCOM based on cascaded two level inverter is proposed. This topology has better utilization of dc link voltage and low THD. It consists of two conventional three phase two level inverters connected in cascade. The cascaded inverter uses 12-sided polygonal voltage space vectors. To obtain 12-sided polygonal voltage space vectors, the dc link voltage of inverter-2 must be maintained at 0.366 times dc link voltage of inverter-1. A simple control strategy is proposed for reactive power compensation as well as to maintain dc link voltages at the required levels. Simulation studies are carried out to predict the system performance. A laboratory prototype is also developed to validate the results obtained by simulation.

Keywords

harmonic distortion; invertors; reactive power control; static VAr compensators; DC link voltage; THD; cascaded two level inverter; control strategy; multilevel STATCOM; reactive power compensation; three phase two level inverter; Aerospace electronics; Automatic voltage control; Harmonic analysis; Inverters; Phase transformers; Topology; 12-sided voltage space vector polygon; Multilevel inverter; STATCOM; Voltage unbalance;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering, Energy and Electrical Drives (POWERENG), 2011 International Conference on

Conference_Location

Malaga

ISSN

2155-5516

Print_ISBN

978-1-4244-9845-1

Electronic_ISBN

2155-5516

Type

conf

DOI

10.1109/PowerEng.2011.6036464

Filename

6036464