Main pump and auxiliary pump optimal switching method for urban secondary water supply pump house

The invention discloses a main and auxiliary pump optimal switching method for an urban secondary water supply pump room, which relates to the technical field of urban water supply, and comprises the following steps: setting the working logic of switching an auxiliary pump, specifically, when only one main pump of equipment runs, if the running frequency of the equipment is continuously lower than an auxiliary frequency F1 for T1 seconds, a system enters an auxiliary pump mode to run; setting the working logic of switching the main pump, specifically, when the equipment is in the auxiliary pump operation mode, if the equipment operation frequency is continuously higher than the auxiliary frequency F2 for T2 seconds, the system enters the main pump mode to operate; setting a switching time period of the main pump and the auxiliary pump, switching the working states of the main pump and the auxiliary pump according to the working logic of the switching auxiliary pump and the working logic of the switching main