The Research Of Flicker Detection In The Online Integrated Monitoring System For Power Quality

Along with the economical increasing development, the power system load power is more and more big, in particular impact load suddenly increased, causes the electric network power supply system not to be stable, causes power distribution network the voltage fluctuation and flicker is increasingly serious, therefore needed to carry on the examination and the analysis to it, then proposed the concrete supervised plan.This paper first briefly introduced voltage fluctuation and flicker the basic concept, the main harm and the evaluating indicator. Having analysed and compared the signal analysis methods of the original voltage fluctuation and flicker, in the IEC recommendation even method examination flicker functional block diagram foundation. The paper carries out digital simulink for the whole measurement processes by MATLAB programs. In the paper proposes a method of calculating Short term flicker severity Ps t, that is the flicker evaluation index are discussed, and simulates confirmation. The paper proposes a new method that combining MATLAB with CCS program technology to develope flicker measurement, the experimental result preliminary proves developed flicker the examination system performance indexes conforms to the challenge of IEC accuracy standard.