Title :
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
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;
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
DOI :
10.1109/ICIT.2008.4608454
