Transient flow and scheduling strategy of long diversion open channel in a hydropower station
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Abstract:
The calculation and analysis of transient process is important to the security of hydropower station. Based on the one-dimensional unsteady flow theory, a numerical model of “long diversion open channel + pressure forebay + pressure conduit+ units” for the system was established for a special hydropower station with long diversion open channel. According to boundary conditions, it calculated the transient flow of pressure pipe using the characteristic method and calculated the transient flow of open channel using Preissmann implicit difference method. It analyzed the change of water level and discharge in channel and forebay in different conditions. It decided the reasonable approach to increasing load due to the low velocity of wave spreading. It ensured the lowest level of open channel and forebay and economic benefits. This gives significant reference to analogous engineering.
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