Low voltage network power quality control system

The utility model discloses a low voltage network power quality control system, including the active compensation unit of electric energy quality, central controller, passive idle compensation unit, phase change switch group, wherein the active compensation unit of electric energy quality possesses harmonic improvement, reactive compensation and unbalanced three phase regulatory function, passivereactive compensation unit realizes that the unbalanced three phase of reactive compensation and certain degree administers the function, phase change switch group possesses the regular unbalanced three phase's of the low voltage network that avoids alternate emergence short circuit law normality and adjusts, the orderly high -efficient operation that central controller realized having the activecompensation unit of electric energy quality, reactive compensation parasitic element and phase change switch to organize. The utility model discloses can effectively solve the multiple electric energy quality problems of low