Final power quality regulating and controlling device for power distribution network and regulating and controlling method

The invention belongs to the field of power quality management, particularly relates to the fields of regulating and controlling of unbalanced load of a power distribution network, and in particular to a final power quality regulating and controlling device for a power distribution network and a regulating and controlling method. The final power quality regulating and controlling device is used for controlling the final power quality of the power distribution network, so as to manage power quality problems such as harmonic wave, idle work and three-phase imbalance in the final stage of the power distribution network. The final power quality regulating and controlling device has the advantages and beneficial effects that 1. an improved current control method is provided; the method is high in dynamic response speed and good in tracking effect; and the compensation effect is improved; 2. a perfect structure of the final power quality regulating and controlling device for the power distribution network is provided; the control algorithm designed for operation on the device is capable of achieving effective control on the device; a good harmonic suppression effect is achieved; and the functions of compensating reactive power, balancing three-phase load and the like can be achieved; and 3. the device is high in response speed, and can respond to the load change within a short period of time, so as to carry out tracking compensation.