Overspeed protection and flow control method based on pumped storage power station

A pumped storage power station, flow control technology, applied in hydroelectric power stations, hydroelectric power generation, water conservancy projects, etc., can solve problems such as the danger of hitting the shore, the increase of shoals, and the lack of sufficient information on water level changes for ships, so as to prolong the service life, The effect of multiple reaction times

Active Publication Date: 2021-12-03
STATE GRID XINYUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the downstream reservoir is pumped, the water level drops rapidly. When the downstream section is converted from the reservoir area to the natural section, the navigation environment becomes more complex, the waterway at the end of the backwater becomes narrower, the water potential and flow pattern gradually become disordered, and the shoals increase. When the water level drops , the ship did not fully grasp the information on water level changes, and did not adjust the cables, anchor chains, springboards, etc. in time to cause accidents such as breakage of the ship’s cables, uncontrolled drift, and anchoring of the ship, or changes in the reference objects on both sides of the strait that the crew was familiar with. Unfamiliar things, or negligent attention to the shape of the shore and reefs, it is very easy to cause the ship to run aground and run aground

Method used

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  • Overspeed protection and flow control method based on pumped storage power station
  • Overspeed protection and flow control method based on pumped storage power station
  • Overspeed protection and flow control method based on pumped storage power station

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Embodiment 1: The image collection module is installed on both sides of the downstream river to collect the information of ships navigating the river, the data set comparison module identifies the ships navigating the river, and counts the number of ships at this time N=10, and the distance analysis module analyzes the distance between the river ships and the downstream The average distance of the reservoir The river channel analysis module calculates the ship redundancy of the river channel W=0.02 according to the number of ships and the distance, and the water turbine unit is set to power Y 0 = 100 kW to pump water from the downstream reservoir to the upstream reservoir; the pumped storage module adjusts the total working power of the water turbine unit Y=92.33 kW according to the redundancy of ships in the downstream river. Statistically, the ambient temperature K=30°C when the turbine is working, at this time, the difference between the turbine 1 and the ambient te...

Embodiment 2

[0068] Embodiment 2: At this time, the number of boats passing through the river is N=100, and the distance analysis module analyzes the average distance between the river boats and the lower reservoir The river channel analysis module calculates the ship redundancy of the river channel W=0.2 based on the number of ships and the distance. At this time, there are too many ships in the river channel. If you continue to maintain the rated flow for pumping work, the ships will not be able to adjust in time. The position of the descending water surface has never encountered dangers such as hitting rocks. , so the pumped storage module sets the total working power of the water turbine unit to Y=64.97 kilowatts according to the redundancy of the downstream river ships.

Embodiment 3

[0069] Embodiment 3: The image collection module is installed on both sides of the downstream river to collect information on ships navigating the river, the data set comparison module identifies the ships navigating the river, and counts the number of ships at this time N=0, and the river channel analysis module according to the number of ships and distance Calculate the ship redundancy of the river channel W=0, that is, there is no ship passing through the channel at this time, and the water turbine unit uses the rated power Y 0 = 100 kW to pump water from the downstream reservoir to the upstream reservoir, the temperature difference analysis module counts the ambient temperature K when the turbine is working = 30°C, at this time the difference between the turbine one and the ambient temperature T 1 =40℃, greater than T 0 =20℃, water turbine with initial current I 0 =10A for pumping work, the power distribution module adjusts the stand-alone operating current I=6.43A of the...

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Abstract

The invention discloses an overspeed protection and flow control method based on a pumped storage power station. The method integrally adopts a flow control system, the flow control system comprises a navigation channel analysis module, an overspeed analysis module and a pumped storage module; the navigation channel analysis module is used for observing passing ships of a navigation channel of the pumped storage power station; the overspeed analysis module is used for detecting the abnormal temperature rise condition that the rotating speed of a water turbine is too high; the pumped storage module is used for pumping water from a downstream reservoir to an upstream reservoir through a pump turbine set and storing energy in the form of potential energy; the channel analysis module comprises an image collection module, a data set comparison module and a distance analysis module; the overspeed analysis module comprises a temperature detection module and a temperature difference analysis module; the pumped storage module comprises a water turbine load module and a power distribution module; and the temperature difference analysis module is electrically connected with the power distribution module. The method has the advantage that the water pumping amount of a hydropower station is adjusted according to the number of ships.

Description

technical field [0001] The invention relates to the technical field of pumped storage energy, in particular to an overspeed protection and flow control method based on a pumped storage power station. Background technique [0002] When the load of the power system of the pumped storage power station is lower than the basic load, the pump turbine of the power station can be used as a water pump to use the excess power generation capacity to pump water from the downstream reservoir to the upstream reservoir to store energy in the form of potential energy; when the system load is higher than the basic load When loaded, it can be used as a water turbine to generate electricity to adjust peak loads. Therefore, the purely pumped storage power station cannot increase the power of the power system, but it can improve the operating economy of the thermal power generation unit and the overall efficiency of the power system, making the pumped storage unit widely valued and developed rap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B15/02F03B13/06E02B9/00
CPCF03B15/02F03B13/06E02B9/00Y02E10/20Y02E60/16
Inventor 严良平丁向东王景彤郑伟崔博涛董瑞靖
Owner STATE GRID XINYUAN
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