Title :
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
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;
Conference_Titel :
Power Engineering, Energy and Electrical Drives (POWERENG), 2011 International Conference on
Conference_Location :
Malaga
Print_ISBN :
978-1-4244-9845-1
Electronic_ISBN :
2155-5516
DOI :
10.1109/PowerEng.2011.6036464
