Considerations on the Unbalance Regime of the Three-Phase Consumers

The paper deals with an analysis upon the unbalance regime of the three-phase consumers supplied with a sinusoidal voltage system and, upon the voltage and current unbalance indicators. For rapidly calculating the unbalance regime specific indicators, knowing the characteristics of the consumers fed from the three-phase network, a software application in the LabVIEW 8.1 environment was developed. The software is used for obtaining the voltage and current symmetrical components and current of neutral, corresponding to different unbalanced operational regimes of three phase consumers. An application was developed for the particular case consisting of a resistive consumer with/without neutral connection. The voltage unbalance factors range within the admissible limits, however not also the current unbalance factors.