Voltage Fluctuations And Flicker Detection And Analysis

As an important index to assess the energy quality, voltage flicker reflects the power supply quality more directly and quickly.In the paper the stages of the voltage fluctuation and flicker are designed based on IEC specfication.The paper carries out digital simulink for the whole measurement processes by MATLAB programs.In the paper three methods of calculating Short term flicker severity -Pst that is the flicker evaluation index are discussed. The paper proposes a new method that combining VB with MATLAB program technology to develope flicker measurement. The combining program of VB and MATLAB is realized by using of Visual C++ and MATLAB interface technology. Finally, combining program measurement software together with data-requiring card and potential transformer circuit complete measurement of three-phases the voltage fluctuation and flicker .