Comparison of manufacturers'power frequency distance protection algorithms with high proportion of renewable energy
With the increasing connection of renewable energy power plants(REPPs),there are some problems that power frequency distance protection criterion cannot identify grid faults.Therefore,this paper focuses on the extraction algorithm of power frequency and protection criteria in the device,and analyzes the adaptability of distance protection algorithms from different manufacturers with high proportion of renewable energy power plants.Regarding the power frequency extraction algorithm,the aperiodic component characteristics of the short-circuit current provided by different renewable energy power plants were explored.The error of Fourier algorithm caused by the influence of harmonic was further derived.For the protection criteria,the adaptability of directional circle,polygon,phase comparison,and power frequency variation distance protection was compared and analyzed,and the distance protection criteria that can be well applied to high proportion of renewable energy power plants were clarified.
renewable energy power plantsdistance protection operating equationfundamental frequency extractionshort-circuit currentharmonic component
国家科技期刊平台
NSTL
万方数据
