A cascade hydropower station group hydropower station optimal water level range control method in flood season

Abstract

The invention discloses a method for controlling an optimal hydropower station flood period water level range of cascaded hydropower stations. The method comprises the following steps: firstly, giving a reservoir inflow frequency curve and an expected water abandoning probability of each cascade of hydropower station in advance and then sequentially carrying out calculation on the hydropower stations reservoir by reservoir according to a sequence from upstream to downstream; if one hydropower station has performance above seasonal regulation, respectively calculating the optimal water levels of first-cascade and non-first-cascade hydropower stations and calculating a total storage outflow expectation of the hydropower station; if the hydropower station does not have performance above seasonal regulation, calculating storage outflow of the hydropower station by utilizing a water balance equation and sequentially traversing all the hydropower stations to obtain the optimal water level range of all the hydropower stations with performance above seasonal regulation in the hydropower stations at a certain moment. According to the method, a real-time water storage and discharge strategy of the cascaded hydropower stations can be scientifically guided, the water abandoning probability of each cascade of hydraulic power plant is guaranteed to be in a controllable range, the water abandoning probability of the cascaded hydropower stations is reduced and loss caused by flood and waterlogging in a drainage basin is reduced.

Description

technical field [0001] The invention relates to a method for controlling the optimal water level range of cascade hydropower station group hydropower stations in flood season, and belongs to the technical field of water conservancy and hydropower control. Background technique [0002] The current flood season of hydropower stations uses the flood limit water level to limit the water level of the reservoir, but in fact, due to the different safety degrees taken in the design of hydropower stations, or because the construction of new power stations has changed the hydrological characteristics of the basin, the water levels of the cascade hydropower station reservoirs will also be at the flood limit When the water level is high, there is a very large difference in the probability of water abandonment, and there is a large difference in the ability to resist floods. This method cannot effectively control the reasonable optimal water level range of the hydropower station accordin...

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Problems solved by technology

[0002] The current flood season of hydropower stations uses the flood limit water level to limit the water level of the reservoir, but in fact, due to the different safety degrees taken in the design of hydropower stations, or because the construction of new power stations has changed the hydrological characteristics of the basin, the water levels of the cascade hydropower station reservoirs will also be at the flood limit When the water level is high, there is a very large difference in the probability of water abandonment, and there is a large difference in the ability to resist floods

This method cannot effectively control the reasonable optimal water level range of the hydropower station according to the real-time water abandonment probability of the hydropower station, which increases the overall water abandonment probability of the cascade hydropower station group and reduces the utilization rate of water energy in the flood season.

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