Voltage flicker has many negative impacts on the safety of the power grid.In order to quickly detect voltage flicker,a double spectral line improved FFT flicker parameter detection algorithm based on energy operator and Kaiser combined cosine window was proposed.The flicker fluctuation signals were extracted by means of energy operator algorithm.The double spectral line interpolation algorithm based on Kaiser window combined cosine window function was used to improve FFT,and the flicker signal was corrected and analyzed to obtain accurate signal parameters.The simulation test results show that the proposed algorithm can effectively overcome the effects of single and multiple frequency modulation and fundamental wave fluctuations,and has the advantages of good stability,small computational complexity and high accuracy.
关键词
电能质量/电压闪变/Kaiser窗/能量算子/最小二乘法
Key words
power quality/voltage flicker/Kaiser window/energy operator/least square
维普
万方数据