As for the reactive power compensation device capacity judgment at the low end of traditional 500 kV substation is relied only experience and without systematic calculation method

in this paper

the comprehensive allocation for the low end compensation capacity of 500 kV substation is determined by way of analysis and comparison. On the basis of the reactive power flow situation and existing allocation condition of the reactive power compensation in 500 kV grid in Jiangsu Province

the practical method of the reactive power compensation allocation for 500 kV substation is proposed from such three aspects as reactive power local compensation and hierarchical partitioning equilibrium

the reason of installing reactive power compensation device for 500 kV substation and the limit compensation capacity for the busbar voltage of 500 kV substation operating within reasonable range. The simulation calculation is made with the simplified simulation model which is set up in power system analysis software package（PSASP）. The three methods are analyzed and compared with combination of actual case so to provide reference for the plan and design of substation