Abstract:For the technical water supply system of power unit in Yunan Huadian Ludila Hydropower Company Limited, a large number of plugin flowmeters are allocated. And the success rate of unit automatic start up is decreased because of the single function, unstable quality and large operation maintenance workload of plugin flowmeters. Through analysis and demonstration, some measurements are adopted to ensure the safe and stable operation of generating unit. The first one is removing unnecessary flowmeters, the second one is replacing the plugin flowmeters by sleevetype flowmeters, which have the advantages of high response sensitivity, high measurement accuracy, good stability and simple installation technology, and the last one is simplifying and optimizing the operation success conditions of technical water supply of power unit, which could shorten the startup time of hydrogenerator unit.

Keywords:hydropower plant, technical water supply system, sleevetype flowmeter