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A method for regulating the surge water level of the upstream surge chamber or downstream surge chamber of a fast and stable long water delivery system power station

A water delivery system and surge chamber technology, which is applied in hydropower stations, hydroelectric power generation, hydraulic engineering, etc., can solve the problems of large hydraulic inertia of the surge chamber, aggravated wear of the unit, and large amplitude of surge waves in the surge chamber. Smooth operation, extended service life, high safety and reliability

Active Publication Date: 2020-10-27
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology

[0002] The surge chambers of power stations with long water conveyance systems (power stations with water conveyance tunnels longer than 3km) have the characteristics of large hydraulic inertia and long periods of water level fluctuations. The problem of large amplitude and slow attenuation of fluctuations will affect the smooth operation of the unit, and will also increase the wear and tear of the unit and shorten the service life of the unit

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  • A method for regulating the surge water level of the upstream surge chamber or downstream surge chamber of a fast and stable long water delivery system power station

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Embodiment Construction

[0014] Such as figure 1 As shown, the upstream surge chamber corresponds to two units, and the length of the diversion tunnel is 16.7km. The maximum water level peak that appeared before 10:42 was caused by the 600MW load reduction of No. 1 unit, and then the No. 2 unit was increased Load 600MW.

[0015] Such as figure 1 As shown, the wavy thin dotted line is the process of waiting for the natural attenuation of the water level fluctuation in the upstream surge chamber without using the control method of the present invention. It can be seen from the figure that it still fluctuates violently after 11:18, because The time axis in the figure shows that the length is limited, and the water level fluctuation after 11:18 is omitted in the figure. In fact, the water level fluctuation basically stopped at 12:20, which took about 1 hour and 35 minutes.

[0016] With the control method of the present invention, in the process of increasing the unit load, if the water level of the sur...

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Abstract

The invention provides a regulation method for quick stabilization of the surge wave level of an upstream surge chamber or downstream surge chamber of a long water conveyance system station. As for load increasing of the upstream surge chamber, water level fluctuation in the surge chamber is neutralized by means of 'increasing-stopping-increasing' stepped interval load increasing to realize quickstabilization of water level fluctuation; as for load reduction of the upstream surge chamber, water level fluctuation in the surge chamber is neutralized by means of 'reducing-stopping-reducing' stepped interval load reduction to realize stabilization of water level fluctuation. The method is simple in operation, the water level fluctuation in the surge chamber can be quickly stabilized to improve stability in operation of a unit, and the service life of the unit is prolonged without increasing any operating cost. The method is generally applicable to long water conveyance system stations including long diversion tunnel or long tailrace tunnel power stations. The method is high in safety and reliability, and automatic control and regulation can be realized by adoption of modern monitoringand intelligent regulation techniques.

Description

technical field [0001] The invention relates to a method for controlling surge water levels of an upstream surge chamber or a downstream surge chamber of a power station in a fast and stable long water delivery system, which is mainly used in hydropower and water conservancy projects. Background technique [0002] The surge chambers of power stations with long water conveyance systems (power stations with water conveyance tunnels longer than 3km) have the characteristics of large hydraulic inertia and long periods of water level fluctuations. The problem of large amplitude and slow attenuation of fluctuations will affect the smooth operation of the unit, and will also increase the wear and tear of the unit and shorten the service life of the unit. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a method for regulating the surge water level of the upstream surge chamber or the downstream surge chamber of a power s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/06E02B1/00
CPCY02E10/20
Inventor 吴疆陈祥荣吴旭敏潘益斌张婷
Owner POWERCHINA HUADONG ENG COPORATION LTD
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