66 kV Chaoyang substation. According to the relevant data of the substation around Jiuli Fanghua, it is concluded that the substation around Jiuli Fanghua in Harbin is called 66 kV Chaoyang Substation, which refers to the place where voltage and current are converted, and electric energy is received and distributed in the power system. The substation in the power plant is a step-up substation, whose function is to boost the electric energy generated by the generator and feed it into the high-voltage power grid.