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Boxcar (rectangular) window functions are commonly used for measurements of electrical energy for revenue purposes, or for power quality assessment. This is because they can be repeated using Bartlett's method so that the time-domain sampled data is used with a uniform aggregated weighting. However, such simple window functions are not suitable for real-time protection and control measurements due...
In order to describe the generation of integer and non-integer harmonics (i.e. interharmonics) in VSI power converters that are supplied from a DC supply (battery) and driving an AC load, a new approach is proposed based on the ldquonon-linear modulatorrdquo concept in frequency-domain; and the analytical model is derived and discussed for commonly used control scheme of d-q reference frame. Afterwards,...
This paper proposes a new modeling of monopolar HVDC (High Voltage Direct Current) link for harmonic load flow analysis in electrical power systems with explicit representation of the DC and AC networks, as well as the converters non-linear characteristics and their harmonic interdependences, ensuring an accurate solution using current injection equations in frequency domain. This new methodology...
Wavelet packet transform (WPT) is one of the most powerful tools in the analysis of the nonstationary signals. Shannon wavelet function is the only function that can divide the frequency domain strictly in the single wavelet family, but the time waveform of Shannon wavelet is not compactly supported, so the application of it is limited. In this paper, a kind of optimized Shannon wavelet transform...
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