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The measurement algorithms applied in power quality measurement systems are based on Fourier Transformation (FT). The discrete versions of Fourier transformation - DFT (Discrete FT) and FFT (Fast Fourier Transformation) are most commonly used. That one-dimension frequency analysis is sufficient in many cases. However, to illustrate the character of the signal in a more comprehensive manner, it is...
The application of power quality parameters measurement algorithms requires utilization of computational methods which transform the signal from the time- to the frequency-domain. Currently, the most frequently applied method is the fast Fourier transformation (FFT). Because of the amendment of the proper power quality standards, it is also necessary to consider of implementation discrete Fourier...
The problems with the power quality encountered in cases of low voltage hospital power networks are increasingly common. It is due to the fact that there are usually a few power networks, backup power sources and a wild range of appliances. That situation may cause disturbances in power network and decrease the quality of electric energy. The problem is significant because power supply networks in...
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