CN109829611B - Cascade optimization scheduling method based on flood control reservoir capacity dynamic allocation - Google Patents
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Abstract
The invention discloses a step optimization scheduling method based on dynamic distribution of flood control reservoir capacity. The method comprises the following steps: s1, collecting basic data and constraint requirements; s2, determining an initial value of the water level of the upstream and downstream water reservoirs; s3, calculating the delivery flow of the upstream and downstream reservoirs; s4, calculating the flow process of the flood control point; s5, judging whether the flood control points are lower than the safe discharge amount one by one; s6, judging whether the water level of the downstream reservoir is lower than the dead water level. On the premise of not affecting flood control, the invention replaces flood control reservoir capacity of the upstream reservoir by using the adjustment reservoir capacity of the downstream reservoir, improves flexibility of cascade reservoir dispatching, and plays a good guiding role in optimizing cascade reservoir dispatching.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower, in particular to a step optimization scheduling method based on dynamic distribution of flood control reservoir capacity.
Background
The reservoir with flood control tasks is flood control scheduling in flood season, and the reservoir water level needs to be reduced to the flood limit water level so as to block the flood when the flood arrives, thereby guaranteeing the flood control safety of downstream flood control objects. However, the water level is controlled to be lower than the flood limit water level in the flood season, so that the power generation water head is reduced, the power generation benefit in the flood season is reduced, and particularly, for a mountain river channel type reservoir, the reserved flood control reservoir has larger water level drop amplitude and larger influence on power generation. If a reservoir with higher regulation performance and larger reservoir capacity exists at the upstream of the flood control reservoir, the flood control function of the flood control reservoir is replaced by the Xingli reservoir capacity of the upstream reservoir, so that the flood control requirement of the flood control reservoir in the flood season is released, the running water level of the reservoir in the flood season is improved, and the power generation benefit of the cascade reservoir is further improved.
However, because the composition of the incoming water and the incoming water level of the upstream and downstream reservoirs are different, and the propagation time of the flood between the two reservoirs affects the corresponding time of flood control scheduling, the replacement relationship between the Xingli reservoir capacity of the upstream reservoir and the flood control reservoir capacity of the downstream reservoir is not equivalent, and only the flood control reservoir capacity of the downstream reservoir can be partially replaced. How to judge whether the flood control function of the downstream reservoir can be replaced by the Xingli reservoir capacity of the upstream reservoir and the equivalent relation between the flood control reservoir capacities can be replaced, quantitative analysis and determination are needed by means of a certain research method, and further the dynamic distribution of the flood control reservoir capacity among the cascade reservoirs is realized on the premise that the flood control function is not influenced, so that the method is a problem to be solved in the optimal scheduling of the existing cascade reservoirs.
How to fully utilize the characteristics of the cascade reservoirs, the mass flow rate of the upstream reservoirs is used for flood control scheduling, the flood control reservoir capacity of the downstream reservoirs bearing flood control tasks is released, dynamic distribution of the flood control reservoir capacity is realized, and the cascade reservoirs have important significance in improving overall power generation benefits and flexibility of power generation scheduling of reservoirs on the premise of not affecting flood control.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides A.
The invention provides a step optimization scheduling method based on dynamic distribution of flood control reservoir capacity, which comprises the following steps:
a. collecting basic data of an upstream reservoir and a downstream reservoir and a constraint requirement of a number;
b. determining initial values of water levels of an upstream water reservoir and a downstream water reservoir;
c. calculating the delivery flow of the upstream reservoir and the downstream reservoir;
d. calculating the flow process of the flood control points;
e. judging whether the flow process of the flood control points is lower than the safe flow one by one;
f. if the flood control point flow of all the calculated time periods is smaller than the safe flow, judging that the regulated reservoir capacity of the downstream reservoir can replace the flood control reservoir capacity of the upstream reservoir;
g. if the flow of the flood control point in any calculation period is larger than the safety flow, slightly downwards regulating the starting water level of the downstream reservoir; judging the water level of the downstream water reservoir after the down regulation;
i. if the regulated water level of the downstream reservoir is smaller than the dead water level of the downstream reservoir, judging that the regulated reservoir capacity of the downstream reservoir cannot be utilized to replace the flood control reservoir capacity of the upstream reservoir;
j. if the regulated water level of the downstream reservoir is greater than the dead water level of the downstream reservoir, repeating the steps c-f.
In the above technical solution, the basic data and the constraint requirements of the upstream and downstream reservoirs in the step a include a water level reservoir capacity curve, a drainage capacity curve, a flood limit water level of the reservoir, a water flow rate of the upstream reservoir, a section flow rate between the upstream and downstream reservoirs, a section flow rate between the downstream reservoir and flood control objects, a safety limit of the reservoir flood control objects, and a flood control scheduling mode of the upstream and downstream reservoirs.
In the technical proposal, the method comprises the steps of adjusting the water level Z of the upstream reservoir 1 Is set to be higher than the flood limit water level Z 1,xun Below the normal water level Z 1,max Any value of (2); level Z of downstream reservoir to be regulated 2 Is set to be flood limit water level Z 2,xun The value of the reservoir equal to the capacity of the replaced flood control reservoir is higher than the flood limit water level, namely:
Z 1 ∈[Z 1,xun ，Z 1,max ]
Z 2 ＝Z 2,xun
wherein Z is 1,xun The flood control water level of the reservoir is replaced by the flood control reservoir capacity;
Z 1 setting a water level for a reservoir of which flood control reservoir capacity is replaced;
Z 1,max normal water level of reservoir which is replaced by flood control reservoir capacity;
Z 2 the water level is regulated for replacing the reservoir of the flood control reservoir capacity;
Z 2,xun the flood control device is used for replacing the flood control reservoir capacity.
In the above technical solution, in step c, the calculation formulas of the outlet flows of the upstream reservoir and the downstream reservoir are as follows:
wherein,,
the outlet flow at the moment t of the upstream water reservoir is; />
The flow is the warehousing flow of the upstream water warehouse at the moment t;
the flow is the warehouse-in flow at the moment t of the downstream water warehouse; />
The outlet flow at the time t of the downstream water reservoir is; />
Is the interval flow between the upstream and downstream water reservoirs.
In the above technical solution, in step d, the flow process of the flood control point has the following calculation formula:
wherein,,
interval flow between a downstream water reservoir and a flood control point; />
The flow is calculated for the flood control point.
In the above technical solution, step f further includes determining a starting water level Z of the downstream water reservoir 2 Namely the water level Z corresponding to the replacement reservoir capacity T 。
In the above technical scheme, in step g, the calculation formula for adjusting the water level of the downstream reservoir is:
Z 2 ＝Z 2 *-0.01；
wherein Z is 2* The water level is adjusted for the downstream reservoir before the downstream reservoir is adjusted downwards.
The invention provides an optimal dispatching method of the cascade reservoir based on dynamic distribution of flood control reservoir capacity for the upstream cascade reservoir and the downstream cascade reservoir which are positioned in a river and can be partially or completely replaced by flood control effect, so that the flexibility of cascade reservoir dispatching is improved while the same flood control effect is achieved, the actual dispatching requirement of the flood season reservoir is met, and the obtained result has the characteristics of intuitiveness and practicability.
Drawings
FIG. 1 is a schematic diagram of the principles of the present invention;
Detailed Description
The invention will now be described in further detail with reference to the drawings and specific examples, which are given for clarity of understanding and are not to be construed as limiting the invention.
As shown in fig. 1, the invention provides a step optimization scheduling method based on dynamic distribution of flood control reservoir capacity, which comprises the following steps:
a. collecting basic data of an upstream reservoir and a downstream reservoir and a constraint requirement of a number;
b. determining initial values of water levels of an upstream water reservoir and a downstream water reservoir;
c. calculating the delivery flow of the upstream reservoir and the downstream reservoir;
d. calculating the flow process of the flood control points;
e. judging whether the flow process of the flood control points is lower than the safe flow one by one;
f. if the flood control point flow of all the calculated time periods is smaller than the safe flow, judging that the regulated reservoir capacity of the downstream reservoir can replace the flood control reservoir capacity of the upstream reservoir;
g. if the flow of the flood control point in any calculation period is larger than the safety flow, slightly downwards regulating the starting water level of the downstream reservoir; judging the water level of the downstream water reservoir after the down regulation;
i. if the regulated water level of the downstream reservoir is smaller than the dead water level of the downstream reservoir, judging that the regulated reservoir capacity of the downstream reservoir cannot be utilized to replace the flood control reservoir capacity of the upstream reservoir;
j. if the regulated water level of the downstream reservoir is greater than the dead water level of the downstream reservoir, repeating the steps c-f.
In the above technical solution, the basic data and the constraint requirements of the upstream and downstream reservoirs in the step a include a water level reservoir capacity curve, a drainage capacity curve, a flood limit water level of the reservoir, a water flow rate of the upstream reservoir, a section flow rate between the upstream and downstream reservoirs, a section flow rate between the downstream reservoir and flood control objects, a safety limit of the reservoir flood control objects, and a flood control scheduling mode of the upstream and downstream reservoirs.
In the technical proposal, the method comprises the steps of adjusting the water level Z of the upstream reservoir 1 Is set to be higher than the flood limit water level Z 1,xun Below the normal water level Z 1,max Any value of (2); level Z of downstream reservoir to be regulated 2 Is set to be flood limit water level Z 2,xun The value of the reservoir equal to the capacity of the replaced flood control reservoir is higher than the flood limit water level, namely:
Z 1 ∈[Z 1,xun ，Z 1,max ]
Z 2 ＝Z 2,xun
wherein Z is 1,xun The flood control water level of the reservoir is replaced by the flood control reservoir capacity;
Z 1 setting a water level for a reservoir of which flood control reservoir capacity is replaced;
Z 1,max normal water level of reservoir which is replaced by flood control reservoir capacity;
Z 2 the water level is regulated for replacing the reservoir of the flood control reservoir capacity;
Z 2,xun the flood control device is used for replacing the flood control reservoir capacity.
In the above technical solution, in step c, the calculation formulas of the outlet flows of the upstream reservoir and the downstream reservoir are as follows:
wherein,,
the outlet flow at the moment t of the upstream water reservoir is; />
The flow is the warehousing flow of the upstream water warehouse at the moment t;
the flow is the warehouse-in flow at the moment t of the downstream water warehouse; />
The outlet flow at the time t of the downstream water reservoir is; />
Is the interval flow between the upstream and downstream water reservoirs.
In the above technical solution, in step d, the flow process of the flood control point has the following calculation formula:
wherein,,
interval flow between a downstream water reservoir and a flood control point; />
The flow is calculated for the flood control point.
In the above technical solution, step f further includes determining a starting water level Z of the downstream water reservoir 2 Namely the water level Z corresponding to the replacement reservoir capacity T 。
In the above technical scheme, in step g, the calculation formula for adjusting the water level of the downstream reservoir is:
Z 2 ＝Z 2 *-0.01；
wherein Z is 2 * The water level is adjusted for the downstream reservoir before the downstream reservoir is adjusted downwards.
The invention provides an optimal dispatching method of the cascade reservoir based on dynamic distribution of flood control reservoir capacity for the upstream cascade reservoir and the downstream cascade reservoir which are positioned in a river and can be partially or completely replaced by flood control effect, so that the flexibility of cascade reservoir dispatching is improved while the same flood control effect is achieved, the actual dispatching requirement of the flood season reservoir is met, and the obtained result has the characteristics of intuitiveness and practicability.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (1)
1. The step optimization scheduling method based on the dynamic distribution of the flood control reservoir capacity is characterized by comprising the following steps of:
a. collecting basic data of an upstream reservoir and a downstream reservoir and a constraint requirement of a number;
b. determining initial values of water levels of an upstream water reservoir and a downstream water reservoir;
c. calculating the delivery flow of the upstream reservoir and the downstream reservoir;
d. calculating the flow process of the flood control points;
e. judging whether the flow process of the flood control points is lower than the safe flow one by one;
f. if the flood control point flow of all the calculated time periods is smaller than the safe flow, judging that the regulated reservoir capacity of the downstream reservoir can replace the flood control reservoir capacity of the upstream reservoir;
g. if the flow of the flood control point in any calculation period is larger than the safety flow, slightly downwards regulating the starting water level of the downstream reservoir; judging the water level of the downstream water reservoir after the down regulation;
i. if the regulated water level of the downstream reservoir is smaller than the dead water level of the downstream reservoir, judging that the regulated reservoir capacity of the downstream reservoir cannot be utilized to replace the flood control reservoir capacity of the upstream reservoir;
j. if the regulated water level of the downstream reservoir is greater than the dead water level of the downstream reservoir, repeating the steps c-f;
in step b, the rising and regulating water level Z of the upstream water reservoir 1 Is set to be higher than the flood limit water level Z 1,xun Below the normal water level Z 1,max Any value of (2); level Z of downstream reservoir to be regulated 2 Is set to be flood limit water level Z 2,xun
Namely: z is Z 1 ∈[Z 1,xun ，Z 1,max ]
Z 2 ＝Z 2,xun
Wherein Z is 1,xun The flood control water level of the reservoir is replaced by the flood control reservoir capacity;
Z 1 setting a water level for a reservoir of which flood control reservoir capacity is replaced;
Z 1,max normal water level of reservoir which is replaced by flood control reservoir capacity;
Z 2 the water level is regulated for replacing the reservoir of the flood control reservoir capacity;
Z 2,xun the flood control water level of the reservoir is used for replacing flood control reservoir capacity;
the basic data and the constraint requirements of the upstream water reservoir and the downstream water reservoir in the step a comprise a water level reservoir capacity curve, a drainage capacity curve, a flood limit water level of a reservoir, water flow from the upstream water reservoir, interval flow between the upstream water reservoir and the downstream water reservoir, interval flow between the downstream water reservoir and flood control objects, safety limit of the flood control objects of the reservoir and a flood control scheduling mode of the upstream water reservoir and the downstream water reservoir;
in step c, the calculation formula of the delivery flow of the upstream reservoir and the downstream reservoir is as follows:
wherein,,
the outlet flow at the moment t of the upstream water reservoir is; />
The flow is the warehousing flow of the upstream water warehouse at the moment t; />
The flow is the warehouse-in flow at the moment t of the downstream water warehouse; />
The outlet flow at the time t of the downstream water reservoir is; />
The flow is the interval flow between the upstream water reservoir and the downstream water reservoir;
in step d, the flow process of the flood control point is calculated as follows:
wherein,,
interval flow between a downstream water reservoir and a flood control point; />
Calculating flow for the flood control points;
step f also includes determining the starting water level Z of the downstream water reservoir 2 Namely the water level Z corresponding to the replacement reservoir capacity T ；
In the step g, the calculation formula for regulating the water level of the downstream reservoir is as follows:
Z 2 ＝Z 2 *-0.01；
wherein Z is 2 * The water level is adjusted for the downstream reservoir before the downstream reservoir is adjusted downwards.
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| CN110348707B (en) * | 2019-06-26 | 2021-09-07 | 长江水利委员会长江科学院 | Generalized step reservoir group combined dispatching system |
| CN110647179B (en) * | 2019-09-29 | 2022-11-01 | 长江勘测规划设计研究有限责任公司 | Pressure reduction control water level determination method for reservoir real-time flood control compensation scheduling |
| CN110852525B (en) * | 2019-11-19 | 2023-04-18 | 长安大学 | Reservoir flood control limit water level dynamic adjustment method based on forecast error override defense |
| CN116227800B (en) * | 2022-11-09 | 2023-12-22 | 中国水利水电科学研究院 | Parallel reservoir group flood control optimal scheduling scheme generation method based on flood control pressure value |
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