Non-forecast flood regulation method for cascade hydropower station based on water level flow

A flood dispatching, non-forecasting technology, applied in hydropower stations, traditional hydropower energy, hydropower, etc., can solve the problems of difficult reservoir charging, ineffective flood resource utilization, etc., to prevent flooding accidents, guarantee safe effect

Inactive Publication Date: 2012-11-14
GUIZHOU WUJIANG HYDROPOWER DEV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the scheduling method of tracking the inflow flow and discharging is often used. The disadvantage of this method is that it is difficult to charge the reservoir to the predetermined high water level at the end of the flood, and it is impossible to effectively utilize the flood resources.

Method used

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  • Non-forecast flood regulation method for cascade hydropower station based on water level flow
  • Non-forecast flood regulation method for cascade hydropower station based on water level flow
  • Non-forecast flood regulation method for cascade hydropower station based on water level flow

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Embodiment Construction

[0044] Embodiment of the present invention: the unforecasted flood dispatching method of the cascade hydropower station based on water level and flow, such as figure 1 shown, including the following steps:

[0045] S1, determine the storage capacity ΔV from the current water level to the set high water level (or given final water level). If the storage water level is the flood limit water level before the flood, the set high water level is the flood control high water level. At this time, ΔV It is exactly the flood control storage capacity of the reservoir;

[0046] S2, always maintain the discharge at the full flow of the unit until half of the storage capacity is stored;

[0047] S3, the inbound flow Q(t) facing the time period is the peak flow Q facing the flood 峰 , the following method is used to calculate the inbound flow Q(t) in the facing period: Q(t)=(V(t+1)-V(t)) / Δt+q(t), where V(t+1) is t The storage capacity of the reservoir at the end of the period, V(t) is the ...

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Abstract

The invention discloses a non-forecast flood regulation method for a cascade hydropower station based on water level flow. The method comprises the following steps of: 1, measuring an initial water level of a reservoir with a floodometer and determining the capacity of a reservoir to be accumulated according to a preset flood control high water level; 2, calculating the current reservoir flow, and calculating the residual flood volume according to a peak and amount relationship; and 3, maintaining the water storage working conditions when the residual flood volume is smaller than the capacity of the reservoir to be accumulated, controlling the flow through a water level fluctuation method when the residual flood volume is greater than the capacity of the reservoir to be accumulated, and accumulating the reservoir flow to a preset high water level. In the regulation process, the actually measured flood storage flow is the current flood peak flow, if the residual flood volume is smaller than the capacity of the reservoir to be accumulated, the water storage working conditions are maintained, and at the moment, the highest reservoir level can be ensured to be lower than the preset high water level; and when the residual flood volume is greater than the capacity of the reservoir to be accumulated, the flood is controlled through the water level fluctuation method, and the reservoir flow is accumulated to the preset high water level.

Description

technical field [0001] The invention relates to an unforecasted flood scheduling method for cascade hydropower stations based on water level and flow, and belongs to the technical field of unforecasted flood scheduling. Background technique [0002] When the reservoir encounters unforeseen floods, it is impossible to draw up a dispatch plan in advance for planned flood dispatch, but ensuring the safety of dams and power stations is still a principle that must be followed. Reservoirs, especially reservoirs with low water levels, are charged to a predetermined high water level. In the existing technology, the scheduling method of tracking the inflow flow and discharging is often used. The disadvantage of this method is that it is difficult to charge the reservoir to the predetermined high water level at the end of the flood, and it is impossible to effectively utilize the flood resource. Contents of the invention [0003] The purpose of the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/00
CPCY02E10/22Y02E10/20
Inventor 何光宏芮钧戴建炜李晓英李泽宏陈守伦肖燕曹丽青
Owner GUIZHOU WUJIANG HYDROPOWER DEV
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