Özet:

This study designed a low-cost monitoring system that can identify power quality problems, measure instant current and voltage values, perform harmonic analysis and reactive power calculations, reporting long-term, if necessary. The designed system allows large amounts of data to be processed and stored in real time. The mini-ITX PC core card is preferred as a basic hardware due to its small sizes, low price and high performance features. The energy quality monitoring software is designed to work in real time using the C# programming language. Windows 7 Embedded operating system has been used due to the requirement that the executed software can be run in real time. Sensor circuits, signals and TMS320F28069 digital signal processor have been used for measurements and calculations. Using the information sampled with TMS320F28069 and transmitted to the system embedded by high-speed serial communication, Fourier conversion, total harmonic conversion, instant active-reactive-visible power calculations are performed. Here, for a correct FFT measurement, flow and voltage samples are taken in time and variable samples are taken in proportion to the basic frequency of instant voltage.

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