The design of power quality monitoring system with embedded systems

Electrical energy, which is indispensable in our lives in every area there is a kind of energy. With developing technology; devices manufactured with high current capacity and power electronics devices lead to deteriorations in the current and voltage waveforms. These distortions adversely affect the quality of the energy and cause damage to other devices that are connected to the transmission system. Examine these harmful effects by recording the fault reason provides useful datas. This study was carried out using the embedded system , making the measurement of instantaneous current and voltage values , which can perform harmonic analysis and the reactive power calculation, reporting the necessary long-term , low-cost monitoring system is designed . The designed system allows processing and storage large amounts of data in real time. Data received from the power transmission system are transferred to the embedded system . FFT, THD and power calculations of the data obtained are recorded in a report at any time request. For measurement and calculation; sensor circuits , signal conditioners and TMS320F28069 digital signal processor is used . Fourier transform, total harmonic conversion, instantaneous active -reactive - apparent power calculations is performed using information sampled and transmitted to embedded systems with high-speed serial communication by TMS320F28069. For an accurate FFT measurement, current and voltage samples has been taken in a manner variable sampling time proportional to the fundamental frequency of instantaneous voltage.