The company currently uses two 45 KW three-phase asynchronous motors (one used and one standby) as the power output for water supply. When the system is running at full load, it can reach a water pressure of about 8 bar, while the actual water pressure required by the company is 4 bar. In addition, the company currently controls the flow by adjusting the valve opening, reducing the valve opening and adjusting the water supply flow. In this way, the pipeline resistance increases, resulting in a large amount of interception losses. This control method not only wastes a lot of motor output power, but also greatly reduces the water supply efficiency of the entire system due to the change of pipe resistance characteristics.