Control system of conventional constant pressure applied in water supply network is large energy and quick equipment wasting with low precision as well as the demanding high condition on the power grid. Along the development and application of frequency conversion technology, the control system of conventional constant pressure is becoming the mainstream of constant pressure control system in water supply network. PLC is widely used in these control systems for its high speed development. The application of PLC in the frequency conversion and speed adjustment water supply is presented.
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郑国海. PLC在变频调速恒压供水系统中的应用[J]. 科学技术与工程, 2006, (20): 3382-3384. ZHENG Guohai. Application of PLC in Frequency Conversion and Speed Adjustment Water Supply System with Constant Pressure[J]. Science Technology and Engineering,2006,(20):3382-3384.