Method for configuring closing rule type of guide vanes of pumped storage power station according to different water heads

Abstract

The invention discloses a method for configuring the closing rule type of guide vanes of a pumped storage power station according to different water heads. According to the method, the water heat altitude is used as the standard when a proper guide value closing rule is selected for the pumped storage power station. When the method is applied, the optimal guide vane closing rule is selected for the pumped storage power station according to the different water heads; a linear closing rule is adopted for the high water head, so that operation steps are effectively simplified, and operation errors are reduced; a delay linear closing rule is adopted for the medium water head, so that operation is easy, and it can be guaranteed that the lowest dynamic piezometric level of a front joint of an upward bent section of a water guide channel is higher than a safety value under a water pumping working condition; a gradually-decelerating two-section fold line type closing rule is adopted for the low water head. The optimum is guaranteed both under the water pumping working condition and under a power generation working condition, the requirement for regulation and guarantee calculation is met, and it is guaranteed that no negative pressure is generated during stable operation of a unit.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery and energy power, and in particular is applied to a method for optimizing the closing law types of guide vanes of pumped storage power stations with different water heads, which is convenient for selecting a suitable closing law for different water heads. Background technique [0002] At present, most of the pumped storage power plants at home and abroad mainly adopt two kinds of guide vane closing laws, straight line and broken line closing. [0003] Straight-line closing means that after the unit sheds load, the guide vane closes at a single speed. This closing law is relatively simple and easy to implement, but sometimes it cannot meet the requirements of maintenance calculation. The break-line closing law means that after the load shedding of the unit, the guide vane closes with a certain slope first, and then closes with another slope after the opening of the guide vane reaches the pr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for configuring guide vane closing laws of pumped storage power stations according to different water heads in order to solve the problem that the improper selection of closing rules of different pumped storage power plants can easily make the operation of the unit unstable.

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