Mathematical model of dynamic reactive power compensation control in traction substation

In order to reduce the influence of traction load on power quality,taking the Y / △-11 traction transformer as an example,the negative sequence current and voltage loss caused by traction load are analyzed.With reactive power and bus voltage as constraints and negative sequence current as objective function,a mathematical model of dynamic reactive power compen-sation control in the traction substation is put forward.Compensation capacities of two power supplying arms can be calculated according to traction loads.The method can heighten power factor and simultaneously decrease the negative sequence current at high-voltage side and the voltage loss at low-voltage side.