Issues and technology assessment on power quality Part 4:Measurement and analysis of voltage fluctuation and flicker

The general definitions of voltage fluctuation and flicker are determined.The calculation formulas and the measurement methods with respect to flicker are described,and the national stan-dard of flicker,GB12326-2000,is discussed.Approaches based on the analysis principles of power system are proposed to assess the effect of flicker propagation along a feeder in high voltage net-works.The transfer factors for voltage fluctuation and flicker are deduced.With the inherence of dominant reactance elements in high voltage networks,it is proved that they are nearly independent of fundamental frequency.Therefore the calculations are simplified and effective.