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Cascade hydropower station minimum discharge flow dynamic control method and system

A control method and technology for cascade power plants, which are applied in hydropower stations, hydropower generation, water conservancy projects, etc., can solve problems such as inaccurate monitoring, and achieve the effects of simplifying monitoring methods, facilitating model solution, and improving utilization efficiency.

Active Publication Date: 2020-08-07
GUIZHOU WUJIANG HYDROPOWER DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It only realized the monitoring of the minimum discharge flow of the hydropower station, and it did not propose improvement measures for the monitoring of low flow, and there are still inaccurate monitoring

Method used

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  • Cascade hydropower station minimum discharge flow dynamic control method and system
  • Cascade hydropower station minimum discharge flow dynamic control method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a method for dynamic control of the minimum discharge flow of cascade hydropower stations, the method performs the following steps:

[0033] Step 1: Judging whether the original minimum discharge flow of the water reduction section between the cascade hydropower stations meets the optimal value interval;

[0034] Step 2: Carry out monitoring and analysis of the backwater in the reservoir area with different water levels on the dam, determine the length of the incompletely connected river section corresponding to different water level levels, and the flow or water level of the control section of the river section;

[0035] Step 3: Obtain the connection data and water resource utilization data of the water-reducing river section, and evaluate the control of the current minimum discharge flow according to the obtained data;

[0036] Step 4: Re-determine the control section of the minimum discharge flow scheduling;

[0037] Step 5: Through calcu...

Embodiment 2

[0045] On the basis of the previous embodiment, the step 1: the method of judging whether the original minimum discharge flow of the water-reducing section between the cascade hydropower stations satisfies the optimal value interval performs the following steps: Acquire the data of the water-reducing section formed by the cascade reservoirs , the data of the water-reducing river section at least includes: the ecological water demand, domestic water consumption and environmental water consumption of the water-reducing river section; the domestic water demand, ecological water consumption and environmental water consumption of the river section obtained through the hydraulic method and / or the hydrological method to calculate the optimal value interval of the minimum discharge amount, and judge whether the original minimum discharge amount is within the optimal value interval; The optimal value needs to be adjusted; if it is within the optimal value interval, it is judged that the...

Embodiment 3

[0048] On the basis of the previous embodiment, said step 2: carry out the monitoring and analysis of the backwater in the reservoir area with different water levels on the dam of the reservoir, determine the length of the incompletely connected river section corresponding to different water level levels, and the flow rate or water level of the control section of the river section The method executes the following steps: According to the current control method, the fluctuation range of the water inflow in the selected interval is within the set threshold range, and the water level change range on the dam of the cascade reservoir is within the set threshold range to monitor the return water of different dam water levels in the reservoir area , determine the position of the backwater end of the reservoir area at different water level levels on the dam, and then determine the length of the incompletely connected river section corresponding to the different water level level and the...

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Abstract

The invention belongs to the technical field of hydropower station control, and particularly relates to a cascade hydropower station minimum discharge flow dynamic control method and system. The method comprises the following steps of 1, judging whether the original minimum discharge flow of a water reducing river reach between cascade power stations meets an optimal value interval or not; 2, monitoring and analyzing backwater of reservoir areas of different dam water levels of a reservoir, and determining corresponding incomplete connection river reach lengths of different water levels and control section flow or water levels of the river reach; 3, acquiring connection data and water resource utilization data of the water reducing river reach, and evaluating the control of the current minimum discharge flow according to the acquired data; and 4, re-determining the control section of the minimum discharge flow scheduling. On the basis of optimizing the control method, a more accurate and convenient minimum discharge flow monitoring mode of the hydropower station is provided through the change of control conditions, and the water energy utilization efficiency of the cascade power station is improved on the premise of ensuring the ecological environment of a river in real time.

Description

technical field [0001] The invention belongs to the technical field of hydropower station control, and in particular relates to a method and system for dynamically controlling the minimum discharge flow of cascade hydropower stations. Background technique [0002] As the concept of ecological civilization construction such as "clear water and green mountains are golden mountains and silver mountains" has gradually become popular, people's vision of enjoying a beautiful ecological environment with ensuring the ecological flow (water level) of rivers and lakes (hereinafter referred to as "ecological flow") as their basic needs is becoming more and more popular. more intense. Alleviating the contradiction between economic and social water use and ecological water use is one of the main challenges facing the current and future water conservancy reform and development. In this context, it is crucial to strengthen the supervision of water projects, standardize the dispatch and ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/00G06Q50/06
CPCE02B9/00G06Q50/06Y02E10/20
Inventor 高英朱江刘泽文李成俊张娜汤成友王世平于洁徐伟肖卫同斌冉钦朋高攀宇曾适
Owner GUIZHOU WUJIANG HYDROPOWER DEV
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