Harmonic analysis of the PWM series/parallel bootstrap variable inductance

Abstract

A FACTS controller, the bootstrap variable inductance (BVI), can emulate positive/negative variable inductance, for controlling either series or shunt parameters of transmission lines. A new analysis method for PWM of the BVI's switching amplifier is presented. A MATLAB program has been written implementing the formulas. The analytical results are confirmed for an example by FFT analysis, and the spectra are in good agreement. The analysis is also applicable to other PWM modulation schemes.