Method for diagnosing water quantity imbalance problem of watershed hydropower station and correcting ex-reservoir flow

A technology for problem diagnosis and hydropower stations, applied in data processing applications, instruments, complex mathematical operations, etc., can solve problems such as outbound flow errors, and achieve easy-to-use, simple and reliable mathematical models

CN114548695APending Publication Date: 2022-05-27GUANGXI POWER GRID CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-05-27

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Abstract

The invention discloses a drainage basin hydropower station water quantity imbalance problem diagnosis and warehouse-out flow correction method. The method comprises the following steps: step 1, basic data arrangement; 2, calculating to obtain drainage basin runoff coefficient probability distribution; 3, for the data of the unreasonable points in the step 2 and the data of the points not falling in the confidence interval, diagnosing the problems according to the actual situation, and judging whether the hydropower station ex-warehouse flow corresponding to the points has problems or not; 4, if the ex-warehouse flow in the step 3 has a problem, establishing a mathematical relationship among the ex-warehouse flow of the hydropower station, the power generation flow and the flood discharge flow; a parameter alpha and a parameter beta are calibrated by calculating a runoff coefficient formula of the hydropower station and a downstream hydropower station on the basis of calibration period data; and 5, calculating the ex-warehouse flow in each time period of the inspection period according to a parameter alpha and a parameter beta which are regularly obtained according to the passing rate. According to the method, the problem of relatively large warehouse-out flow error caused by unbalanced water quantity can be solved.
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Description

technical field

[0001] The invention relates to the technical field of hydrological forecasting and reservoir dispatching, and more particularly, to a method for diagnosing and correcting outgoing flow of a watershed hydropower station for the problem of water imbalance. Background technique

[0002] The principle of water balance is widely used in the field of hydrological forecasting and reservoir regulation. It is one of the basic equations of hydrology. Famous hydrological methods such as Muskingen method are formed based on the principle of water balance. However, in actual situations, calculations often occur. The stations in the basin do not meet the application conditions of the principle of water balance, especially in the basins with many water conservancy and hydropower projects, the outbound flow is calculated based on the relevant real-time data and characteristic curve data, so there are different degrees of calculation errors, which lead to cascade hydropower s...

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Embodiment Construction

[0042] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

[0043] It should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. Based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operates in a specific orientation, and...