Impact of voltage phase jump on loads and its mitigation

Mitigation of the impacts of source-side voltage disturbances through series voltage compensation technique is considered. The power quality enhancement technique is shown to result in phase shift on load terminal voltages. The effect of the phase-shift on the loads is then examined by taking the dynamics of the loads under the phase disturbance condition into consideration. The analysis permits an insight into the inherent characteristics of the load dynamics to be gained. A new method of introducing the phase shift is then proposed. The method balances the need for achieving acceptable load swings while maximizing the saving in the stored energy of the series custom power device.