A short-term optimal dispatching model considering cascade dynamic flow hysteresis

A water flow delay and optimal dispatching technology, applied in the direction of instruments, data processing applications, forecasting, etc., can solve the problems of fine description of water flow delay dynamic changes, short-term dispatch deviation of cascade hydropower station groups, etc.

Inactive Publication Date: 2019-01-11
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

However, in the above-mentioned technical solutions, the dynamic changes of water flow delay are not described in detail, which leads to deviations in the short-term dispatch of cascade hydropower station groups

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  • A short-term optimal dispatching model considering cascade dynamic flow hysteresis
  • A short-term optimal dispatching model considering cascade dynamic flow hysteresis
  • A short-term optimal dispatching model considering cascade dynamic flow hysteresis

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Embodiment Construction

[0084] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0085] Such as figure 1 As shown, a kind of short-term optimization dispatching model of cascade dynamic water flow delay of a kind of preferred embodiment of the present invention, comprises the following steps:

[0086] S1. Obtain the objective function that maximizes the sum of power generation of the cascade hydropower station group during the dispatch period considering the cascade dynamic water flow delay, and construct the original model;

[0087] S2, constructing a mixed integer linear programming model with multi-segment real-number delays;

[0088] S3, using the piecewise linearization method to linearize the two-dimensional nonlinear relationship between water...

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Abstract

The invention relates to the technical field of power grids, and discloses a short-term optimal dispatching model considering cascade dynamic flow hysteresis, which comprises the following steps: constructing an original model; constructing a mixed integer linear programming model with multiple real delays; linearizing the two-dimensional nonlinear relationship between the water level and the reservoir capacity by a piecewise linearization method. A piecewise linear method is used to linearize the two-dimensional nonlinear relationship between tail water level and discharge. The three-dimensional linear interpolation method is used to linearize the three-dimensional nonlinear relationship of the dynamic characteristic curve of the hydropower station. A mixed integer linear programming model is developed from the original model for the short-term optimal dispatch considering cascade dynamic flow hysteresis. The mixed integer linear programming model is used to optimize the dispatching of cascade hydropower stations. The invention can accurately describe the flow lag time in the short-term optimal dispatching of the cascade hydropower stations.

Description

technical field [0001] The invention relates to the technical field of grid planning and dispatching operation, in particular to a short-term optimal dispatching model considering cascade dynamic water flow delay. Background technique [0002] Cascade hydropower in Southwest my country is mainly concentrated in the main streams of large rivers. One of the main characteristics of these rivers is that the length of the river in the area rich in water energy is large, and the upstream to downstream stretches for thousands of kilometers. It takes a period of time for the outflow of the reservoir to become the inflow of the downstream reservoir, that is, there is a water flow lag. As an index to measure the closeness of the hydraulic connection of the cascade hydropower station group, the water flow lag time between the cascades directly affects the water balance relationship of the downstream hydropower station during the period, and then indirectly affects the hydropower station...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/0631G06Q10/067G06Q50/06Y02E40/70Y04S10/50
Inventor 王嘉阳周保荣姚文峰
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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