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In the Grid system connected with shield machine, harmonic pollution and low power factor are the two power quality problems that need to be solved. Reactive power compensation and harmonic suppression are two different aspects of the problem, but their common characteristics provide the possibility for a comprehensive study of the two. By detecting harmonics and reactive currents in power system and then using Power Filter Active to dynamically track and compensate the power grid system can solve the problem of harmonic pollution and low power factor. The simulation experiment was carried out to prove the compensation system can improve the power quality of the power grid effectively. Keywords-shield machine; harmonic suppression; reactive power compensation; active power filter

Research on Reactive Power Compensation and Harmonic Suppression of Shield Machine Based on APF