DESIGN OF A SIMPLE MEASURING TECHNIQUE OF THE INSTANTANEOUS POWER IN THREE PHASE SYSTEM

Ali Tahri - Azeddine Draou

   This paper describes an electronic means of measuring the instantaneous active and reactive power absorbed by any electrical equipment. The measurements are based on the Clark (alpha-beta) and Park (d-q) transformations. The system is useful to teach electrical machines in Park's coordinates and it allows also the study and control of some power electronics converters that are connected to three phase power network, such as static VAR compensator. The principle of the measuring method of the active and reactive power is described and analysed for different tests. The effectiveness of the proposed measuring method is confirmed by experimental investigation employing a test system.

Keywords: reactive power, active power, instantaneous power, SVC, power converter

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