Abstract: An integrative testing system for the performance indexes (security, stability, reliability, and economy) of hydropower generating units is presented. The system consists of 7 sub-function devices and an analysis platform. The 7 sub-function devices are respectively responsible for the monitoring of cavitation and pressure fluctuation of hydroturbine, partial discharge of generator, air gap of generator, energy efficiency of power units, vibration and throw of power units, as well as the testing and simulation of hydro-turbine's governing system performance, and the testing and simulation of generator's excitation system performance. With this system, the performance indexes could be comprehensively and scientifically evaluated. China's dependence on the import of crucial monitoring equipment for hydropower unit can be changed thoroughly. Our innovation ability and the level of monitoring equipment for hydroelectric generating sets can be improved. 

Key words: sub-device, analysis platform, synchronous sampling, performance index, integrative testing