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HUANG Zhichao, LIAO Zhijian, HUANG Xiangli. Research of a separation method of positive and negative sequence component in coal mine power supply system[J]. Journal of Mine Automation, 2015, 41(11): 60-64. DOI: 10.13272/j.issn.1671-251x.2015.11.015
Citation: HUANG Zhichao, LIAO Zhijian, HUANG Xiangli. Research of a separation method of positive and negative sequence component in coal mine power supply system[J]. Journal of Mine Automation, 2015, 41(11): 60-64. DOI: 10.13272/j.issn.1671-251x.2015.11.015
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Research of a separation method of positive and negative sequence component in coal mine power supply system

  • Electromechanical Engineering College, Guilin University of Electronic Technology, Guilin 541004, China

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  • In view of problem that negative sequence components in unbalanced coal mine power system affect stable running of electric locomotive, and in order to satisfy control strategy of three-phase PWM rectifier, the characteristics of asymmetric signal under rotating coordinate system and the principle of enhanced notch filter were studied, and a separation method of positive and negative sequence component was presented. The rotating-coordinate system was used to transform the asymmetric signal and the enhanced adaptive notch filter was used to filter the two-times frequency signal in the method. The Matlab/Simulink simulation results show that the method can extract DC value of positive and negative sequence components in asymmetric signal precisely and quickly and can filter some harmonic waves.
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