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Tuesday, October 25
PQS 03
The Power Quality and the Wavelet –Based- Decomposition of Nonactive Power for Nonsinusoidal Waveforms
8:30 am-9:30 am
This paper shows some key properties of the nonactive power resulting from non-sinusoidal periodical voltage and current waveforms represented by using discrete samples. The any kind wavelet-based decomposition of the waveforms, written in a form consistent with the application of a multiresolution approach, provides the transformed voltage and current vectors. These vectors are used to build a suitable antisymmetrical matrix, whose off-diagonal elements contain information on both reactive and waveform distortion aspects, and which makes possible to obtain the nonactive power of the circuit. In particular, this matrix can provide a detailed view on the nonactive power components by conserving the same total nonactive power computed from voltages and currents in the time or frequency domain. The paper discusses the effects of the decomposition of the nonactive power into several components associated to the wavelet multiresolution approach. Illustrative examples are provided to show the properties of the Discrete Wavelet Transformation-based representation applied to calculating the nonactive power components in the presence of distorted voltage and current waveforms with different amplitudes and phase angles of the harmonics.
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Tuesday, October 14, 2008
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