The small-disturbed working conditions of part open channel of typical pump station system has been studied to establish the water diversion system composed by multi-pumping stations

including the mathematic model of pipeline

open channel and inlet and outlet pools of pump station.The design program of optimal control system was used to solve the parameters of controller and the condition spatial method to solve the transient process under the condition of small disturbance.The simulation calculations were respectively made for the optimum control system and PID governor controlling system and some results have been gained.