Thesis (M.Sc.) - Cairo University - Faculty of Engineering- Department of Electrical Power and Machines

Industrial processes are heavily automated to improve their manufacturing efficiencies and performances. The result of this trend is that the industrial customers of electric power introduce highly nonlinear loads to the power distribution system, due to the excessive use of power electronic equipments. This can introduce a large amount of harmonic distortion throughout the system. Since the distribution systems are including different categories of loads, the contributions of waveform distortion between the utility and the customer are of growing interest. Power components such as active, reactive and apparent power are well defined under sinusoidal balanced systems. At present, the definitions and physical meanings of power components are still debatable, so none of the approaches can lead to power component definitions, which satisfy all required power properties under non-sinusoidal conditions. Due to this reason, it is important to determine precisely the magnitude and direction of energy and power for each harmonic order; in case of non-sinusoidal condition the thesis suggests an approach in power theory. The idea of this approach has been inspired from the concept of instantaneous power

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