The water supply system of all kinds of residential quarters in the city is an important part of the infrastructure of residential quarters. The operation of water conservation system directly affects the normal work and life of residents in the community. The reliability, stability and economy of water supply are closely related to the life of residents in the community. Due to the different defects of the traditional water supply mode, such as water supply obstacles caused by pressure fluctuations, the increase or decrease of water supply depends on manual operation and so on, the working performance of the traditional water supply system directly affects the normal life of residents in the community. In order to improve the working performance of water supply system and ensure the normal water supply of residents, more and more water supply systems gradually adopt the control structure based on inverter and PLC. According to the requirements of users for water supply system, this example analyzes the composition and working principle of the water supply system in the community, analyzes the control requirements of the system, and designs a frequency conversion water supply control system based on frequency converter and PLC.<br>
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