This paper presents a new method to find the optimum switching angles in voltage source multilevel converters in order to minimize specific higher order harmonics and decrease the total harmonic distortion (THD) of their output voltage waveform. The output voltage waveform of inverter can either be in the form of staircase or PWM. In order to increase the degrees of freedom and elimination of m...

The waveform-relaxation method is an iterative method for analysis of nonlinear dynamical system. Two waveform-relaxation algorithms i.e., Gauss-Seidel(GS) and Gauss-Jacobi(GJ) algorithms are presented for analysis of dynamical system. Then organization of a waveform-relaxation circuit simulator is described.