Non-linear Characteristic of Output Voltage and Method for Determining Carrier Frequency in a Series Voltage Compensator

Abstract

This paper describes the non-linear characteristic of output voltage and a method for determining carrier frequency. First, the linear region of the output voltage is determined by calculating the upper limit of the modulation factor (a_li) for which the gate signal does not disappear. Second, the carrier frequency, which falls below a_li, is determined by calculating the modulation factor that generates the rated output voltage and by calculating the compensation voltage that reduces the dead-time and impedance voltage. Third, the accuracy of the proposed design method is experimentally confirmed.