Non-uniform capacitor voltage ripple in a cascaded H-bridge StatCom

Author

Townsend, C.D. ; Vodden, J. ; Watson, A.J. ; Summers, T.J. ; Betz, R.E. ; Clare, J.C.

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Univ. of Newcastle, Newcastle, NSW, Australia

fYear

2012

fDate

26-29 Sept. 2012

Firstpage

1

Lastpage

6

Abstract

Employing space vector modulation in a multi-level H-bridge StatCom (H-StatCom) can provide an excellent tradeoff between harmonic performance and switching frequency. However the nature of the techniques used to balance the capacitor voltages in this control strategy means that capacitor voltage ripple is increased. This can have detrimental effects on the current tracking performance. This paper both compares the capacitor voltage ripple in differing space vector modulation techniques and develops a compensation scheme to minimise the effect of ripple on the current tracking performance. Simulation results are presented that confirm the correct operation of the compensation scheme.

Keywords

capacitor switching; static VAr compensators; voltage control; capacitor voltage ripple; cascaded H-bridge STATCOM; compensation scheme; control strategy; current tracking performance; nonuniform capacitor voltage ripple; space vector modulation; switching frequency; Capacitors; Harmonic analysis; Support vector machines; Switches; Vectors; Voltage control; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Universities Power Engineering Conference (AUPEC), 2012 22nd Australasian

Conference_Location

Bali

Print_ISBN

978-1-4673-2933-0

Type

conf

Filename

6360228