Simulation device for distribution network power quality study

The invention provides a simulation device for distribution network power quality study. The simulation device comprises a three-phase fixed harmonic source and a variable harmonic reactive source which are in parallel connection, wherein the three-phase fixed harmonic source is used for supplying main sub-harmonic in an actual power distribution network, and the variable harmonic reactive source is used for providing overlaying of any sub-harmonic and reactive currents. According to the simulation device, the existing active filter is replaced by the variable harmonic reactive source capable of providing overlaying of any sub-harmonic and the reactive currents, possible harmonic and reactive conditions in reality can be simulated, therefore data and experience for handling the problems can be acquired, preparation for solving the problems in actual work is made, and the power supply quality of power systems is guaranteed.