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An optimal scheduling method based on a multi-objective medium- and long-term stochastic scheduling model for cascade reservoir ecological power generation

A cascaded reservoir and random scheduling technology, applied in data processing applications, forecasting, instruments, etc., can solve problems such as poor ecological power generation scheduling effects of reservoirs

Active Publication Date: 2021-06-04
CHINA THREE GORGES UNIV
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Problems solved by technology

[0003] The present invention proposes an optimal scheduling method based on the multi-objective medium- and long-term random scheduling model of cascade reservoir ecological power generation, which is used to solve or at least partially solve the technical problem of poor ecological power generation scheduling effect in the prior art

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  • An optimal scheduling method based on a multi-objective medium- and long-term stochastic scheduling model for cascade reservoir ecological power generation
  • An optimal scheduling method based on a multi-objective medium- and long-term stochastic scheduling model for cascade reservoir ecological power generation
  • An optimal scheduling method based on a multi-objective medium- and long-term stochastic scheduling model for cascade reservoir ecological power generation

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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 method for constructing a multi-objective medium- and long-term random dispatching model for ecological power generation of cascade reservoirs and an optimal dispatching method, including the following steps: 1. Analyzing the random inflow runoff of cascade reservoirs, and adopting the ecological water demand level index method Calculate the suitable ecological flow as the ecological flow reference value; 2. Establish a multi-objective medium- and long-term optimal dispatching model for cascade reservoir ecological power generation, which includes the objective function of the closeness degree of power generation of the cascade reservoir, the objective function of the closeness degree of ecological flow rate and constraints; 3. Adopt Reinforcement learning SARSA algorithm solves and learns the model under different random runoff scenarios, and introduces heuristic function and utility trace function to improve the accuracy and solution speed of the algorithm; 4. According to the scheduling rules learned by the algorithm, it is obtained that the ecological Medium- and long-term dispatching scheme of cascade reservoirs with the largest comprehensive closeness of power generation. The invention improves the comprehensive utilization benefit of water resources and improves the scheduling effect.

Description

technical field [0001] The invention relates to the technical field of energy-saving and environmental protection industries, in particular to an optimal scheduling method based on a multi-objective medium- and long-term random scheduling model for cascade reservoir ecological power generation. 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 play a role in ecol...

Claims

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Application Information

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Patent Type & Authority Patents(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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