OTTIMIZZAZIONE DI MISURE DI POTENZA E VALUTAZIONE DELL’ATTENDIBILITÀ IN AMBIENTE LABVIEW

The steady state of a three-phase system can be defined if the phase-to-phase voltages and the line currents with the phase shift angles referred to the three star voltages existing between each wire and a center of the system are determined. In the most general case, three voltmeters, three ammeters and three single-phase phasometers are required for these measurements. To determine the relative phase shift between line voltage and current, direct measurements of the active (reactive) powers are performed, carried out by means of various measurement methods that can be used according to the specifications of both the system and the applied load. In the proposed thesis work, different known methods for power measurements in some possible cases are examined and optimized, jointly with the measurement uncertainty evalutation