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A cascade reservoir group ecology-power generation dynamic mutual feedback control method

A cascade reservoir and ecological technology, applied in the direction of circuit devices, AC network circuits, single-network parallel feeding arrangement, etc., can solve the problems of single target and poor adaptability

Active Publication Date: 2020-02-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It aims to solve the problems of single target and poor adaptability existing in the existing cascade reservoir group ecology-power generation joint optimal dispatching method

Method used

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  • A cascade reservoir group ecology-power generation dynamic mutual feedback control method
  • A cascade reservoir group ecology-power generation dynamic mutual feedback control method
  • A cascade reservoir group ecology-power generation dynamic mutual feedback control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as figure 1 As shown, a cascade reservoir group ecology-power generation dynamic mutual-feedback control method S100 includes the following steps:

[0065] Step S110: Make the power generation and water flow conditions meet the water quality water demand (W qua ), cut-off water demand (W dry ), water demand for sand flushing (W sed ), ecological water demand (W eco ) The spatio-temporal proportions of the four ecological standards are used as the objective function of the ecology-power generation mutual-feedback regulation model of the cascade reservoir group. The constraint set of the cascade reservoir group ecology-power generation mutual Equations, water storage limit constraints, power generation flow limit constraints, outflow flow constraints and power station output limit constraints;

[0066] Step S120: Using the improved non-dominated sorting genetic algorithm to obtain the optimal outflow of each reservoir at each time period from the ecology-power ge...

Embodiment 2

[0070] Based on Embodiment 1, the objective function of the cascade reservoir group ecology-power generation mutual-feedback control model is specifically:

[0071] (1) Power generation target:

[0072]

[0073] In the formula: E is the total power generation of the power station involved in the calculation during the dispatching period, kW h; I is the number of reservoirs; i is the serial number of the reservoir, i=1,2,...,I; T is the number of time slots during the dispatching period; t is the serial number of the time slot , t=1,2,...,T; P i,t is the output of reservoir i in period t, kW; Δt is the number of hours in period t, h.

[0074] (2) Ecological goals:

[0075] The ecological guarantee rate is defined as the time-space ratio of water flow conditions meeting the ecological standards of the above four water demand parameters. Taking the period division (month) of long-term hydropower dispatching as an example, the calculation formula of the ecological guarantee ...

Embodiment 1 Embodiment 2

[0083] Based on Embodiment 1 or Embodiment 2, the constraint conditions of the cascade reservoir group ecology-power generation mutual-feedback control model are as follows:

[0084] Water balance equation:

[0085] V i,t+1 =V i,t +3600×(I i,t -D i,t )Δt,i∈[1,I],t∈[1,T]

[0086] In the formula, V i,t is the storage capacity of reservoir i in period t, m 3 ; I i,t is the inflow flow of reservoir i in period t, m 3 / s.

[0087] Inbound flow balance equation:

[0088]

[0089] In the formula, q i,t , Q i,t , S i,t Respectively, the interval flow, power generation flow and abandoned water flow of reservoir i in time period t, m 3 / s;m i is the mth directly upstream reservoir of reservoir i; U i is the set of reservoirs directly upstream of reservoir i.

[0090] Outbound flow balance equation:

[0091] D. i,t =Q i,t +S i,t ,i∈[1,I],t∈[1,T]

[0092] Water storage limit constraints:

[0093]

[0094] In the formula, are the upper and lower limits of the ...

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Abstract

The invention discloses an ecological-power generation dynamic mutual feedback regulation method for a cascade reservoir group. The method comprises: a generating capacity and an ecological assurancerate are used as objective functions of an ecological-power generation mutual feedback regulation model of a cascade reservoir group, wherein a constraint set of the ecological-power generation mutualfeedback regulation model of the cascade reservoir group includes a water balance equation, an inflow flow balance equation, an outflow flow balance equation, a water storage limit constraint, a power generation flow constraint, an outbound flow constraint and a power station output constraint and the ecological assurance rate is obtained by meeting a space-time proportion of four ecological standards including a water quality demand, a cutoff water demand, a sand flushing water demand, and an ecological water demand by a water flow condition; and on the basis of an improved non-domination sorting genetic algorithm, optimal outflow floes of all reservoirs at all periods are obtained from the ecological-power generation mutual feedback regulation model of the cascade reservoir group. According to the invention, the generating capacity and the ecological assurance rate are used as objective functions; and the influence on the ecological environment is reduced while the maximum reservoirpower generation amount is ensured.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency utilization of water resources and optimal dispatching of hydropower station groups, and more specifically relates to a method for dynamic mutual feedback control of cascade reservoir group ecology-power generation. Background technique [0002] In the past two decades, my country's hydropower industry has developed rapidly. Especially in Southwest China, where hydropower resources are most concentrated, the construction and operation of large-scale cascade reservoirs such as the Lancang River, Jinsha River, Dadu River, Yalong River, Wujiang River, and Hongshui River have greatly changed and affected the natural form of the watershed. to avoid significant impact on its ecological environment. The dispatching of cascade reservoirs coupled with control objectives such as power generation and ecology has become an important topic of runoff utilization, especially the research on optimal disp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCH02J3/46H02J2203/20
Inventor 冯仲恺牛文静夏燕覃晖莫莉蒋志强陈璐胡德超周建中
Owner HUAZHONG UNIV OF SCI & TECH
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