A graphical interface for interactive AC/DC system harmonic analysis

Detailed modelling of the harmonic cross-modulation process performed by a power converter, especially under unbalanced operation, is a difficult task. Although it can be achieved using time domain analysis, it is too slow for interactive work using PCs, and does not represent the frequency response of the components accurately. A fast accurate harmonic domain solution is therefore the best option. This paper presents an interactive program that combines the harmonic domain solution with pre- and post-processing graphics to analyse and display AC/converter/DC system harmonic interactions