Abstract
The maximum test load of Changlongshan pumped storage power station steel bifurcation pipe is 10MPa. To ensure the safety of the water pressure test, acoustic emission is used to monitor the main welds of the crescent rib steel bifurcation and main cone. Taking NO.3 pipe’s data as an example, acoustic emission source location system was used to find the possible position of harmful defects, through the activity and intensity of the acoustic emission sources to confirm the defect significance. After analysis, the acoustic emission integrated level of the steel bifurcation pipe is in level II, the pipe’s data comply with the design requirements.
Highlights
The Changlongshan pumped storage power station is located in Anji County, Zhejiang Province
The power station hub is mainly composed of an upper reservoir, lower reservoir, water conveyance system, underground powerhouse, and switch station
The power station hub is mainly composed of an upper reservoir, diversion system, underground powerhouse system, tailwater system, and lower reservoir project
Summary
The Changlongshan pumped storage power station is located in Anji County, Zhejiang Province. The power station hub is mainly composed of an upper reservoir, lower reservoir, water conveyance system, underground powerhouse, and switch station. After completion, it mainly undertakes the tasks of peakshaving, valley filling, frequency modulation, phase modulation, and emergency standby of East China Power Grid[1]. The upper reservoir inlet/outlet, the upper reservoir accident repair gate well, the diversion upper flat hole, the diversion upper inclined shaft, the diversion middle flat hole, the diversion lower inclined shaft, the diversion lower flat hole, the steel bifurcation pipe, the highpressure branch pipe section. The wall thickness of main and branch pipes is 66 mm, and the wall thickness of crescent ribs is 138 mm.
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