A method and apparatus for determining allowable value of inertia time constant of water flow in a pumped storage surge chamber

A technology of time constant and water flow inertia, which is applied in the field of surge chambers, can solve problems such as unreasonable determination of setting parameters

Active Publication Date: 2019-02-19
STATE GRID CORP OF CHINA +2
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of unreasonable determination technology of upstream surge chamber setting parameters in the prior art, an embodime

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  • A method and apparatus for determining allowable value of inertia time constant of water flow in a pumped storage surge chamber
  • A method and apparatus for determining allowable value of inertia time constant of water flow in a pumped storage surge chamber
  • A method and apparatus for determining allowable value of inertia time constant of water flow in a pumped storage surge chamber

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] The pumped storage power station is a special hydropower station that uses the electric energy when the power load is low to pump water to the upper reservoir, and then releases water to the lower reservoir for power generation during the peak power load period. It stores excess electricity when the grid load is low, and converts it into urgently needed electricity when the grid load is high.

[0051]Surge chamber, set on the pressure water channel, has...

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Abstract

The invention provides a method for determining an allowable value of an inertia time constant of water flow in a pumped storage surge chamber, which includes determining the propagation velocity of pressure wave in a pumped storage pipeline and the initial velocity of liquid in the pipeline; acquiring the design head of pumped storage, the initial opening of a guide vane, the maximum allowable pressure rise rate and the closing time of guide vane; determining a pipe cross-section coefficient according to the design head, the pressure wave propagation velocity in the pipe and the initial velocity of the pipe liquid; determining the permissible value of the inertia time constant according to the initial opening of the guide vane, the coefficient of pipe section, the maximum allowable pressure rise rate and the closing time of the guide vane. As that allowable value of the flow inertia time constant of the pumped storage power station cannot be dared by enterprises, the invention is suitable for the boundary condition of the pumped storage power station, and has important significance for the design of the pumped storage power station.

Description

technical field [0001] The invention relates to a surge chamber, in particular to a method and a device for determining the allowable value of the inertial time constant of the water flow in a pumped storage surge chamber. Background technique [0002] The surge chamber is an important building installed on the pressurized water delivery system of the pumped storage power station. It can be installed on the water diversion system or the tail water system according to the specific conditions of the power station. The function of its settings is to fully reflect the water hammer wave propagating in the water delivery system, so that the water hammer value in the waterway system can be controlled within a reasonable range. [0003] Setting surge wells in the long pressure water diversion system of pumped storage power plants can reduce the water hammer pressure in high-pressure waterways and protect the pressure pipelines from being damaged due to excessive water hammer pressur...

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Application Information

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IPC IPC(8): G06F17/10
CPCG06F17/10Y02E10/20
Inventor 韩标王珏丁景焕杨静韩文福
Owner STATE GRID CORP OF CHINA
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