Abstract
AbstractIn order to solve the problem that the existing voltage flicker researches cannot accurately and reasonably allocate the voltage flicker responsibility among the fluctuating loads, a method based on instantaneous power to allocate the flicker responsibility of multi fluctuation load is proposed. First, we measure the instantaneous power of the fluctuating loads and perform the backward difference operation to obtain the power fluctuation sequence, and calculate the voltage fluctuation sequence in combination with the system parameters. Then we use the Fourier transform to obtain the fluctuation value of different frequency components and be equivalent to 8.8 Hz. Finally, according to the corresponding relationship between 8.8 Hz sine wave voltage fluctuation and flicker, the voltage flicker value is calculated. Simulation results show that this method can still accurately measure the flicker contribution rate of each fluctuating loads and the improvement rate of the compensation device when there exist multiple fluctuating loads, and realize the accurate allocation of the flicker responsibility of multiple undulating loads.KeywordMultiple fluctuating loadsVoltage flickerInstantaneous power fluctuationCompensation deviceResponsibility allocation
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