Harmonic distortion analysis in armature currents of synchronous machine during co-operation with the power system

In the article an analysis of harmonic distortion in armature currents in synchronous machine during co-operation with electric power system is presented. The analysis is carried out thanks to the computer applications designed in LabVIEW - graphical programming environment. The applications allow to carry out the analysis of the influence of voltage unbalance and harmonic distortion on the power quality and to display on screen the non-sine waveforms of the voltages and currents taken by electrical equipment. Moreover, the programs display the RMS values of active, reactive and apparent power as well as power of distortion and coefficients: THD, PHD, IHD, power factor and voltage unbalance. In addition, the applications allow to record the signals from A/C measuring devices or oscilloscopes and save them to file for further analysis.