Construction method of cascade reservoir ecological power generation multi-objective medium-and-long-term random scheduling model and optimal scheduling method

A cascade reservoir and random scheduling technology, applied in the direction of instruments, data processing applications, forecasting, etc., can solve the problems of poor ecological power generation scheduling effects of reservoirs, etc., to achieve sustainable utilization and ensure a virtuous cycle

Active Publication Date: 2020-12-04
CHINA THREE GORGES UNIV
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Problems solved by technology

[0003] The present invention proposes a method for constructing a multi-objective medium- and long-term stochastic dispatching model for ecological power generation of cascade reservoirs and an optimal dispatching method, which are used to solve or at least partly solve the technical problem of poor ecological power generation dispatching effect of reservoirs in the prior art

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  • Construction method of cascade reservoir ecological power generation multi-objective medium-and-long-term random scheduling model and optimal scheduling method
  • Construction method of cascade reservoir ecological power generation multi-objective medium-and-long-term random scheduling model and optimal scheduling method
  • Construction method of cascade reservoir ecological power generation multi-objective medium-and-long-term random scheduling model and optimal scheduling method

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Embodiment 1

[0082] The embodiment of the present invention provides a method for constructing a multi-objective medium- and long-term stochastic dispatch model for cascade reservoir ecological power generation, including:

[0083] S1: According to the water level and power generation of the reservoir, construct the objective function of the closeness degree of power generation of cascade reservoirs:

[0084]

[0085]

[0086]

[0087] In the formula: N is the total number of reservoirs; T is the total number of time periods in the scheduling cycle, is the expected value of the total power generation in the cascade reservoir dispatching period, the unit is kW h, E sj is the product of the total installed capacity of cascade reservoirs and the length of a dispatch cycle, in units of kW h, A i is the comprehensive output coefficient of the i-th reservoir; H i,t is the average power generation water head of the i-th reservoir in the period t, and the unit is m; its solution formul...

Embodiment 2

[0111] This embodiment provides an optimal dispatching method, which is implemented based on the multi-objective medium- and long-term random dispatching model of cascade reservoir ecological power generation constructed in Embodiment 1. The optimal dispatching method includes:

[0112] S1: Use random inflow runoff sequences with Markov properties to represent the inflow of water in different stages of reservoirs in cascade reservoirs, and use conditional probability to represent the probabilistic relationship between inflow runoff in the two periods before and after. At the same time, according to Peel The random value of inflow runoff corresponding to various probabilities can be obtained by simulating the method of inferior type Ⅲ probability distribution;

[0113] S2: Calculate the suitable ecological flow of the river by using the ecological water demand grade index method;

[0114] S3: The medium and long-term scheduling cycle is one year, and a cycle is divided into 12 ...

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Abstract

The invention provides a construction method of a cascade reservoir ecological power generation multi-objective medium-and-long-term random scheduling model and an optimal scheduling method. The method comprises the following steps of: 1, analyzing random reservoir inflow runoff of a cascade reservoir, and employing an ecological water demand level index method to calculate a suitable ecological flow as an ecological flow reference value; 2, establishing a cascade reservoir ecological power generation multi-objective medium-and-long-term optimization scheduling model which comprises a cascadereservoir power generation amount closeness objective function, an ecological flow closeness objective function and constraint conditions; 3, adopting a reinforcement learning SARSA algorithm to solveand learn the model in different random storage runoff scenes, and introducing a heuristic function and a utility trace function to improve the precision and solving speed of the algorithm; and 4, according to a scheduling rule learned by the algorithm, obtaining a cascade reservoir medium-and-long-term scheduling scheme meeting the maximum ecological power generation comprehensive closeness. According to the methods of the invention, the comprehensive utilization benefit of water resources is improved, and the scheduling effect is improved.

Description

technical field [0001] The invention relates to the technical field of energy-saving and environmental protection industries, in particular to a method for constructing a multi-objective medium- and long-term random dispatch model for cascade reservoir ecological power generation and an optimal dispatch method. Background technique [0002] As the renewable energy with the most mature technology and the largest development scale, hydropower plays an important role in the global power energy supply due to its low operating cost, good regulation performance and fast load response capability. However, during the actual operation of the reservoir, on the one hand, it can alleviate the problem of uneven distribution of water resources in time and space; It will have a great impact and cause the ecological environment of the river to deteriorate. As my country accelerates green development and implements the strictest environmental protection system, reservoirs are required to pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/06312G06Q10/06315G06Q50/06Y04S10/50
Inventor 李文武刘江鹏郑凯新石强余跃严展鹏
Owner CHINA THREE GORGES UNIV
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