Analysis of the DC-link capacitor voltage spectrum in the cascaded multilevel STATCOM

Author

Botao, Zhang ; Ziling, Nie ; Bei, Li ; Liping, Zhang

Author_Institution

Coll. of Comput. Sci., Wuhan Univ. of Sci. & Technol., Wuhan

fYear

2008

fDate

21-24 April 2008

Firstpage

1

Lastpage

5

Abstract

A general expression for the spectrum of the DC-link capacitor voltage in the cascaded multilevel STATCOM is presented, and to predict the amplitude and frequency of the voltage harmonic components produced by balanced AC power voltage and current. The computation is developed using the switching functions approach, relating DC-link current, SPWM control pulse and the output AC current. Especially, the 2-th voltage harmonic is discussed in detail. Consideration of the voltage ripple, the required capacitance value and the voltage reference value are presented.

Keywords

PWM invertors; static VAr compensators; DC-link capacitor voltage spectrum; cascaded multilevel STATCOM; switching functions; voltage ripple; Automatic voltage control; Capacitance; Capacitors; Frequency; Genetic expression; Harmonic analysis; Pulse width modulation; Switches; Topology; Voltage control; capacitor voltage reference; cascaded multilevel STATCOM; required capacitance; switching functions; voltage spectrum;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 2008. ICIT 2008. IEEE International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-1705-6

Electronic_ISBN

978-1-4244-1706-3

Type

conf

DOI

10.1109/ICIT.2008.4608454

Filename

4608454