On techniques for the localisation of multiple distortion sources in three-phase networks: Time domain verification.

Frequency domain network modelling techniques have shown that the localisation of steady-state distortion sources by monitoring the direction of active power in the harmonic components can not be accomplished through continuous single-point measurements in the presence of multiple distortion sources. Because frequency domain models of line commutated AC/DC converters could so easily be susceptible to error, the same analysis in the time domain will enhance the credibility of the findings. A time-domain approach has therefore been adopted by generating the equivalent power system data through repeated ATP (alternative transients programme) simulations and interpreting the resulting trends by means of a Mathcad package. The results obtained confirm the previous findings.