CN111709605B - Reservoir power station peak regulation capability assessment method based on multiple counter regulation effects - Google Patents
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Abstract
The invention discloses a reservoir power station peak regulation capacity assessment method based on multiple counter regulation, which is characterized by comprising the following steps of: step 1, selecting a calculation period, and dividing the calculation period into four periods of early peak, flat period, late peak and valley period according to peak-valley time-of-use electricity price; step 2, measuring the output N of the reservoir power station in the peak period in the selected calculation period Peak to peak And reservoir power station low-valley period output N Cereal grain The method comprises the steps of carrying out a first treatment on the surface of the Step 3, according to N obtained in step 2 Peak to peak And N Cereal grain And obtaining an index peak-to-valley output ratio S for evaluating the peak-to-peak capacity of the reservoir power station, wherein the larger the peak-to-valley output ratio S is, the stronger the peak-to-peak capacity of the power station is. The peak regulation capacity and the operation mode obtained by the calculation method are stable in the final step flow descending process, and the operation of downstream river channels or water conservancy facilities is not adversely affected.
Description
Technical Field
The invention relates to the field of dispatching control of hydroelectric systems, in particular to a reservoir power station peak regulation capacity assessment method based on multiple counter regulation.
Background
In the later 90 s, the load structure of the power grid is greatly changed along with the increase of the national economy, the improvement of the industrial production capacity and the increasingly improved living standard of people. The peak-valley difference of the power grid is increasingly larger, the load rate of the power grid is reduced year by year, and the peak shaving problem is always a prominent problem of each power grid. The hydroelectric power is clean renewable energy, and the conventional hydroelectric generating set has the characteristics of quick start, high climbing rate, large peak regulation amplitude and the like, and is an excellent power supply for carrying out peak regulation, frequency modulation and phase modulation of electric power. Hydropower stations, especially large hydropower stations with good regulation performance, have important significance for ensuring the supply of electric quantity of a power grid and ensuring the safe and stable operation of the power grid, and when the hydropower station with the regulation performance operates in peak regulation, other types of units can be stably operated, and the start-stop expense and the system operation cost of the hydropower station with the regulation performance are saved; and with the gradual propulsion of the power marketing reform, the water and electricity peak regulation enthusiasm is fully mobilized. The peak regulation potential research of the reservoir power station is developed, the reasonable peak regulation operation capacity of the reservoir power station is defined, the method has very important significance for guiding the peak regulation operation of the reservoir power station on a power grid, the power generation benefit of the hydropower station with regulation performance can be effectively improved, and the economic operation of the power station is ensured.
Disclosure of Invention
In order to solve the problems in the related art, the invention provides a reservoir power station peak regulation capacity assessment method based on multiple counter regulation.
The invention is realized by the following technical scheme:
the utility model provides a reservoir power station peak regulation ability evaluation method based on multiple counteradjustment effect which is characterized by comprising the following steps:
step 2, measuring the output N of the reservoir power station in the peak period in the selected calculation period Peak to peak And reservoir power station low-valley period output N Cereal grain ；
Step 3, according to N obtained in step 2 Peak to peak And N Cereal grain And obtaining an index peak-to-valley output ratio S for evaluating the peak-to-peak capacity of the reservoir power station, wherein the larger the peak-to-valley output ratio S is, the stronger the peak-to-peak capacity of the power station is.
Further, the peak Gu Chuli to S ratio is calculated by:
step (1), setting the peak-to-average-valley output ratio of the reservoir power station A to be 1:n 1 :n 2 Wherein: n is n 1 Is the normal section output coefficient, n is more than or equal to 0 1 ≤1；n 2 The output coefficient is 0 to n in the valley period 2 Is less than or equal to 1; the peak-to-valley output ratio represents the output ratio of three periods of high peak section, flat section and low valley section in one day;
setting the water level of a reservoir power station A, researching the total power generation in a period, and combining the peak-to-valley power ratio to 1:n 1 :n 2 Calculating to obtain the power station A output process N 1,t ；
Step (3), combining the output process N of the step (2) according to the water consumption rate of the reservoir power station A 1,t And the time length of each period, calculating to obtain the outflow process Q of the reservoir power station A 1,t ；
Step (4), checking whether the reservoir power station A generates waste water or not, and if so, entering the step (5); if no water is discarded, entering the step (6);
step (5), obtaining a warehouse-in flow process i of a period B interval of a reservoir power station 2,t Consider the discharge flow process Q under reservoir station A 1,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 2,t Wherein: q 2,t ＝Q 1,t+Δt +i 2,t ；
Step (6), correcting the output coefficient n of the reservoir power station A 2 And (7) entering a step;
step (7), judge n 2 Whether or not it is greater than n 1 When n is 2 >n 1 When the reservoir power station A output coefficient n is corrected 1 And returning to step (8); when n is 2 ≤n 1 If yes, the step (8) is entered;
step (8), accumulating the warehousing flow q in each period 2,t Obtaining the total quantity Q of the reservoir power station B 2 total ；
Step (9), setting the ratio of the B peak to the flat valley output of the reservoir power station to be 1:n 3 :n 4 Wherein: n is n 3 Is the normal section output coefficient, n is more than or equal to 0 3 ≤1；n 4 The output coefficient is 0 to n in the valley period 4 ≤1；
Step (10), simulating a power generation process of the reservoir power station B, judging whether each constraint in the model is met when the power generation process is operated at the peak-to-average-valley flow ratio, and if so, entering step (11); if all constraints cannot be met, entering a step (12);
step (11), acquiring a warehouse-in flow process i of a C period interval of a reservoir power station 3,t Down-flow process Q 2,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 3,t ＝Q 2,t+Δt +i 3,t ；
Step (12), correcting the B output coefficient n of the reservoir power station 4 And (3) entering a step (13);
step (13), judging and correcting the B output coefficient n of the reservoir power station 4 Whether or not it is greater than 1, if n 4 >1, returning to the step (6) to correct the output coefficient of the reservoir power station A; if n 4 If not more than 1, entering the step (14);
step (14), judge n 4 Whether or not it is greater than n 3 When n is 4 >n 3 When the reservoir power station B output coefficient n is corrected 3 The method comprises the steps of carrying out a first treatment on the surface of the When n is 4 ≤n 3 If yes, go to step (15);
step (15), obtaining a warehouse-in flow process i of a C period interval of a reservoir power station 3,t Down-flow process Q 2,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 3,t ＝Q 2,t+Δt +i 3,t ；
Step (16), accumulating the warehousing flow q in each period 3,t Obtaining the total quantity Q of the reservoir power station C 3 Total ；
Step (17), setting the ratio of C peak Gu Chuliu of the reservoir power station to be 1:1, and obtaining the drainage flow process Q under the reservoir power station C 3,t ；
Step (18), simulating the operation of the reservoir power station C with stable downward drainage flow, judging whether the reservoir power station C can meet various constraints such as the water passing capacity of a unit, the water storage capacity of the reservoir, the water balance in each period and the like, and if the reservoir power station C can meet various constraints, finishing calculation to obtain the peak regulation peak-to-average-valley output ratio of the reservoir power station A of 1:n 1 :n 2 Peak shaving potential is 1:n 2 I.e. s=1:n 2 The method comprises the steps of carrying out a first treatment on the surface of the If all the constraint conditions cannot be satisfied, the process returns to step (12).
Further, the corrected output coefficient is obtained by the method based on the original output coefficientAdding 0.1 to obtain a corrected output coefficient, wherein the output coefficient comprises n 1 、n 2 、n 3 And n 4 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, in correcting n 1 Time n 2 =0, indicating each correction n 1 All things are n 2 Starting from zero; at correction n 3 Time n 4 =0, indicating each correction n 3 All things are n 4 Starting from zero.
Further, the constraints comprise water balance constraints, cascade power station water quantity connection constraints, reservoir water storage capacity constraints, cascade under-discharge flow constraints, water passing capacity constraints of each reservoir power station unit and reservoir power station output constraints.
Further, the water balance constraint is:
wherein: v (V) i,t 、V i,t+1 For the water storage capacity at the end of the t period and the next period of the ith reservoir power station, m 3 ；R i,t The average warehousing flow rate of the ith period of the ith reservoir power station, m 3 ·s -1 ；Q i,t The power generation flow of the ith period of the ith reservoir power station, m 3 ·s -1 ；D i,t For the water discarding flow of the ith period of the ith reservoir power station, m 3 ·s -1 。
Further, the cascade power station water quantity connection constraint is as follows:
wherein: Δt (delta t) i-1 The corresponding time period number is the water lag time of the ith power plant-1 to the ith power plant; i i,t For the interval average inflow between the ith period i-1 power plant and the ith power plant, m 3 ·s -1 。
Further, the reservoir water storage capacity constraint is:
wherein: v (V) i,min 、V i,max The minimum water storage capacity and the maximum water storage capacity required in the scheduling period of the ith reservoir power station are respectively obtained.
Further, the step under drain flow constraint is:
wherein: q (Q) N,t 、Q N,t+1 And the leakage flow is respectively reduced in the period t and the period t+1 of the last-stage power station of the step.
Further, the water passing capacity constraint of each reservoir power station unit is as follows:
wherein: q (Q) i,min 、Q i,max The minimum and the maximum discharge flows of the ith reservoir power station are respectively.
Further, the reservoir power station output constraint is:
wherein N is i,min Minimum allowable output (MW, depending on the type and characteristics of the turbine) for the ith reservoir station; n (N) i,max Is the installed capacity (MW) of the ith reservoir station.
Further, all of the variables described above are non-negative variables.
Compared with the prior art, the invention has the following advantages:
the peak regulation capacity and the operation mode obtained by the calculation method are stable in the final step flow descending process, and the operation of downstream river channels or water conservancy facilities is not adversely affected. However, the conventional prior art method does not consider the point, which causes large fluctuation change of the leakage flow of the step power station in the day, thus being unfavorable for the operation management of the downstream power station and facilities.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 shows the process of discharging the flow from a power station of a A, B, C three-reservoir in example 1 of the present invention;
FIG. 2 shows the water level change of the reservoir station B in the back-regulation process according to embodiment 1 of the present invention;
fig. 3 shows the water level change of the reservoir power station C of example 1 of the present invention during the back-regulation.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which is to be read in light of the specific examples.
A reservoir power station peak regulation capability assessment method based on multiple counter regulation effects comprises the following steps:
step 2, measuring the output N of the reservoir power station in the peak period in the selected calculation period Peak to peak And reservoir power station low-valley period output N Cereal grain ；
Step 3, according to N obtained in step 2 Peak to peak And N Cereal grain And obtaining an index peak-to-valley output ratio S for evaluating the peak-to-peak capacity of the reservoir power station, wherein the larger the peak-to-valley output ratio S is, the stronger the peak-to-peak capacity of the power station is.
Further, the peak Gu Chuli to S ratio is calculated by:
step (1), setting the peak-to-average-valley output ratio of the reservoir power station A to be 1:n 1 :n 2 Wherein: n is n 1 Is the normal section output coefficient, n is more than or equal to 0 1 ≤1；n 2 The output coefficient is 0 to n in the valley period 2 Is less than or equal to 1; the peak-to-valley output ratio represents the output ratio of three periods of high peak section, flat section and low valley section in one day;
setting the water level of a reservoir power station A, researching the total power generation in a period, and combining the peak-to-valley power ratio to 1:n 1 :n 2 Calculating to obtain the power station A output process N 1,t ；
Step (3), combining the output process N of the step (2) according to the water consumption rate of the reservoir power station A 1,t And the time length of each period, calculating to obtain the outflow process Q of the reservoir power station A 1,t ；
Step (4), checking whether the reservoir power station A generates waste water or not, and if so, entering the step (5); if no water is discarded, entering the step (6);
step (5), obtaining a warehouse-in flow process i of a period B interval of a reservoir power station 2,t Consider the discharge flow process Q under reservoir station A 1,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 2,t Wherein: q 2,t ＝Q 1,t+Δt +i 2,t ；
Step (6), correcting the output coefficient n of the reservoir power station A 2 And (7) entering a step;
step (7), judge n 2 Whether or not it is greater than n 1 When n is 2 >n 1 When the reservoir power station A output coefficient n is corrected 1 And returning to step (8); when n is 2 ≤n 1 If yes, the step (8) is entered;
step (8), accumulating the warehousing flow q in each period 2,t Obtaining the total quantity Q of the reservoir power station B 2 total ；
Step (9), setting the ratio of the B peak to the flat valley output of the reservoir power station to be 1:n 3 :n 4 Wherein: n is n 3 Is the normal section output coefficient, n is more than or equal to 0 3 ≤1；n 4 The output coefficient is 0 to n in the valley period 4 ≤1；
Step (10), simulating a power generation process of the reservoir power station B, judging whether each constraint in the model is met when the power generation process is operated at the peak-to-average-valley flow ratio, and if so, entering step (11); if all constraints cannot be met, entering a step (12);
step (a)(11) Process i for acquiring warehouse-in flow of C period interval of reservoir power station 3,t Down-flow process Q 2,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 3,t ＝Q 2,t+Δt +i 3,t ；
Step (12), correcting the B output coefficient n of the reservoir power station 4 And (3) entering a step (13);
step (13), judging and correcting the B output coefficient n of the reservoir power station 4 Whether or not it is greater than 1, if n 4 >1, returning to the step (6) to correct the output coefficient of the reservoir power station A; if n 4 If not more than 1, entering the step (14);
step (14), judge n 4 Whether or not it is greater than n 3 When n is 4 >n 3 When the reservoir power station B output coefficient n is corrected 3 The method comprises the steps of carrying out a first treatment on the surface of the When n is 4 ≤n 3 If yes, go to step (15);
step (15), obtaining a warehouse-in flow process i of a C period interval of a reservoir power station 3,t Down-flow process Q 2,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 3,t ＝Q 2,t+Δt +i 3,t ；
Step (16), accumulating the warehousing flow q in each period 3,t Obtaining the total quantity Q of the reservoir power station C 3 Total ；
Step (17), setting the ratio of C peak Gu Chuliu of the reservoir power station to be 1:1, and obtaining the drainage flow process Q under the reservoir power station C 3,t ；
Step (18), simulating the operation of the reservoir power station C with stable downward drainage flow, judging whether the reservoir power station C can meet various constraints such as the water passing capacity of a unit, the water storage capacity of the reservoir, the water balance in each period and the like, and if the reservoir power station C can meet various constraints, finishing calculation to obtain the peak regulation peak-to-average-valley output ratio of the reservoir power station A of 1:n 1 :n 2 Peak shaving potential is 1:n 2 I.e. s=1:n 2 The method comprises the steps of carrying out a first treatment on the surface of the If all the constraint conditions cannot be satisfied, the process returns to step (12).
Further, the corrected output coefficient is obtained by adding 0.1 to the original output coefficient, and the output coefficient comprises n 1 、n 2 、n 3 And n 4 The method comprises the steps of carrying out a first treatment on the surface of the Wherein the method comprises the steps ofIn the correction of n 1 Time n 2 =0, indicating each correction n 1 All things are n 2 Starting from zero; at correction n 3 Time n 4 =0, indicating each correction n 3 All things are n 4 Starting from zero.
Further, the constraints comprise water balance constraints, cascade power station water quantity connection constraints, reservoir water storage capacity constraints, cascade under-discharge flow constraints, water passing capacity constraints of each reservoir power station unit and reservoir power station output constraints.
Further, the water balance constraint is:
wherein: v (V) i,t 、V i,t+1 For the water storage capacity at the end of the t period and the next period of the ith reservoir power station, m 3 ；R i,t The average warehousing flow rate of the ith period of the ith reservoir power station, m 3 ·s -1 ；Q i,t The power generation flow of the ith period of the ith reservoir power station, m 3 ·s -1 ；D i,t For the water discarding flow of the ith period of the ith reservoir power station, m 3 ·s -1 。
Further, the cascade power station water quantity connection constraint is as follows:
wherein: Δt (delta t) i-1 The corresponding time period number is the water lag time of the ith power plant-1 to the ith power plant; i i,t For the interval average inflow between the ith period i-1 power plant and the ith power plant, m 3 ·s -1 。
Further, the reservoir water storage capacity constraint is:
wherein: v (V) i,min 、V i,max The minimum water storage capacity and the maximum water storage capacity required in the scheduling period of the ith reservoir power station are respectively obtained.
Further, the step under drain flow constraint is:
wherein: q (Q) N,t 、Q N,t+1 And the leakage flow is respectively reduced in the period t and the period t+1 of the last-stage power station of the step.
Further, the water passing capacity constraint of each reservoir power station unit is as follows:
wherein: q (Q) i,min 、Q i,max The minimum and the maximum discharge flows of the ith reservoir power station are respectively.
Further, the reservoir power station output constraint is:
wherein N is i,min Minimum allowable output (MW, depending on the type and characteristics of the turbine) for the ith reservoir station; n (N) i,max Is the installed capacity (MW) of the ith reservoir station.
Further, all of the variables described above are non-negative variables.
Example 1
The embodiment provides a reservoir power station peak regulation capacity assessment method based on multiple counter regulation.
In this embodiment, a cascade reservoir power station system consisting of A, B, C reservoir power stations in sequence from upstream to downstream is selected, where a is the regulated reservoir power station and B, C is the counter-regulated reservoir power station of a.
The embodiment focuses on the peak regulation capability of the reservoir power station A, and the influence of the peak regulation operation of the reservoir power station A on downstream river channels and water conservancy facilities is avoided through the counter regulation effect of B, C.
And combining the reservoir water level of the reservoir power station A and the total power generation amount in the research period, and calculating to obtain the peak-to-average-valley power ratio of the reservoir power station A under each combination according to the peak regulation potential calculation method, wherein the peak-to-average-valley power ratio is shown in a table 1.
TABLE 1 hydropower station A Peak-to-average-Peak-to-Valley force ratio
In order to analyze how to avoid the influence on downstream river and water conservancy facilities, a combination with the total power generation amount of 4000MW & h and the reservoir water level of 2090m is selected as a typical example, under the combination, the peak regulation potential of the reservoir power station A is 1:0.4, and in the calculation process, the outflow process of the step three power stations and the reverse regulation reservoir water level change process are obtained.
As shown in fig. 1, the peak-to-valley fluctuation of the reservoir power station A is generated, the outflow process of the peak-to-Gufeng-valley fluctuation is generated, the scheduling operation of the downstream main flow power station is adversely affected, the amplitude of the peak-to-valley fluctuation is reduced through the counter-regulation action of the reservoir power station B, the peak-to-valley fluctuation is eliminated through the secondary counter-regulation action of the reservoir power station C, the smooth outflow process is finally regulated, and the adverse effect of the peak-to-valley fluctuation of the reservoir power station A on the downstream river channel and water conservancy facility operation is eliminated.
Fig. 2 and 3 show the process of the reservoir power station B, C using the back-regulation of the reservoir, respectively, in which the water amount in the peak period is accumulated to the flat period or the valley period and is discharged down in the allowable range, so as to achieve the purpose of smooth outflow.
Claims (9)
1. The utility model provides a reservoir power station peak regulation ability evaluation method based on multiple counteradjustment effect which is characterized by comprising the following steps:
step 1, selecting a calculation period, wherein the calculation period is divided into four periods of an early peak, a flat period, a late peak and a valley period according to peak-valley time-of-use electricity prices;
step (a)2, measuring the output N of the reservoir power station in the peak period in the selected calculation period Peak to peak And reservoir power station low-valley period output N Cereal grain ；
Step 3, according to N obtained in step 2 Peak to peak And N Cereal grain Obtaining an index peak-to-valley output ratio S for evaluating the peak-to-peak capacity of a reservoir power station, wherein the larger the peak-to-valley output ratio S is, the stronger the peak-to-peak capacity of the power station is;
the peak Gu Chuli to S ratio is calculated by:
step (1), setting the peak-to-average-valley output ratio of the reservoir power station A to be 1:n 1 :n 2 Wherein: n is n 1 Is the normal section output coefficient, n is more than or equal to 0 1 ≤1；n 2 The output coefficient is 0 to n in the valley period 2 Is less than or equal to 1; the peak-to-valley output ratio represents the output ratio of three periods of high peak section, flat section and low valley section in one day;
setting the water level of a reservoir power station A, researching the total power generation in a period, and combining the peak-to-valley power ratio to 1:n 1 :n 2 Calculating to obtain the output process N of the reservoir power station A 1,t ；
Step (3), combining the output process N of the step (2) according to the water consumption rate of the reservoir power station A 1,t And the time length of each period, calculating to obtain the outflow process Q of the reservoir power station A 1,t ；
Step (4), checking whether the reservoir power station A generates waste water or not, and if so, entering the step (5); if no water is discarded, entering the step (6);
step (5), obtaining a warehouse-in flow process i of a period B interval of a reservoir power station 2,t Consider the discharge flow process Q under reservoir station A 1,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 2,t Wherein: q 2,t ＝Q 1,t+Δt +i 2,t ；
Step (6), correcting the output coefficient n of the reservoir power station A 2 And (7) entering a step;
step (7), judge n 2 Whether or not it is greater than n 1 When n is 2 >n 1 When the reservoir power station A output coefficient n is corrected 1 And returning to the step (2); when n is 2 ≤n 1 When it is, go to stepStep (8);
step (8), accumulating the warehousing flow q in each period 2,t Obtaining the total quantity Q of the reservoir power station B 2 total ；
Step (9), setting the ratio of the B peak to the flat valley output of the reservoir power station to be 1:n 3 :n 4 Wherein: n is n 3 Is the normal section output coefficient, n is more than or equal to 0 3 ≤1；n 4 The output coefficient is 0 to n in the valley period 4 ≤1；
Step (10), simulating a power generation process of the reservoir power station B, judging whether each constraint in the model is met when the power generation process is operated at the peak-to-average-valley flow ratio, and if so, entering step (11); if all constraints cannot be met, entering a step (12);
step (11), acquiring a warehouse-in flow process i of a C period interval of a reservoir power station 3,t Down-flow process Q 2,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 3,t ＝Q 2,t+Δt +i 3,t ；
Step (12), correcting the B output coefficient n of the reservoir power station 4 And (3) entering a step (13);
step (13), judging and correcting the B output coefficient n of the reservoir power station 4 Whether or not it is greater than 1, if n 4 >1, returning to the step (6) to correct the output coefficient of the reservoir power station A; if n 4 If not more than 1, entering the step (14);
step (14), judge n 4 Whether or not it is greater than n 3 When n is 4 >n 3 When the reservoir power station B output coefficient n is corrected 3 The method comprises the steps of carrying out a first treatment on the surface of the When n is 4 ≤n 3 If yes, go to step (15);
step (15), obtaining a warehouse-in flow process i of a C period interval of a reservoir power station 3,t Down-flow process Q 2,t And time delay, obtaining a warehouse-in flow process q of the reservoir power station B 3,t ＝Q 2,t+Δt +i 3,t ；
Step (16), accumulating the warehousing flow q in each period 3,t Obtaining the total quantity Q of the reservoir power station C 3 Total ；
Step (17), setting the ratio of C peak Gu Chuliu of the reservoir power station to be 1:1, and obtaining the drainage flow process Q under the reservoir power station C 3,t ；
Step (18), simulating the operation of the reservoir power station C with stable downward drainage flow, judging whether the reservoir power station C can meet various constraints such as the water passing capacity of a unit, the water storage capacity of the reservoir, the water balance in each period and the like, and if the reservoir power station C can meet various constraints, finishing calculation to obtain the peak regulation peak-to-average-valley output ratio of the reservoir power station A of 1:n 1 :n 2 Peak shaving potential is 1:n 2 I.e. s=1:n 2 The method comprises the steps of carrying out a first treatment on the surface of the If all the constraint conditions cannot be satisfied, the process returns to step (12).
2. The method for evaluating peak shaving capacity of a power station of a reservoir based on multiple counter-regulation as claimed in claim 1, wherein the corrected output coefficient is obtained by adding 0.1 to the original output coefficient, said output coefficient comprising n 1 、n 2 、n 3 And n 4 The method comprises the steps of carrying out a first treatment on the surface of the Wherein, in correcting n 1 Time n 2 =0, indicating each correction n 1 All things are n 2 Starting from zero; at correction n 3 Time n 4 =0, indicating each correction n 3 All things are n 4 Starting from zero.
3. The method for evaluating the peak shaving capacity of a reservoir power station based on multiple counter-regulation actions according to claim 1, wherein the constraints comprise a water balance constraint, a cascade power station water quantity linkage constraint, a reservoir water storage capacity constraint, a cascade under-discharge flow constraint, a water passing capacity constraint of each reservoir power station unit and a reservoir power station output constraint.
4. A reservoir power station peak shaver capacity assessment method based on multiple counter-regulation according to claim 3, wherein the water balance constraint is:
wherein: v (V) i,t 、V i,t+1 For the water storage capacity at the end of the t period and the next period of the ith reservoir power station, m 3 ；R i,t The average warehousing flow rate of the ith period of the ith reservoir power station, m 3 ·s -1 ；Q i,t The power generation flow of the ith period of the ith reservoir power station, m 3 ·s -1 ；D i,t For the water discarding flow of the ith period of the ith reservoir power station, m 3 ·s -1 。
5. A reservoir power station peak shaving ability evaluation method based on multiple counter-regulation as set forth in claim 3, wherein said cascade power station water quantity association constraint is:
wherein: Δt (delta t) i-1 The corresponding time period number is the water lag time of the ith power plant-1 to the ith power plant; i i,t For the interval average inflow between the ith period i-1 power plant and the ith power plant, m 3 ·s -1 。
6. A reservoir power station peak shaving ability assessment method based on multiple counter-regulation according to claim 3, wherein the reservoir water storage capacity constraint is:
wherein: v (V) i,min 、V i,max The minimum water storage capacity and the maximum water storage capacity required in the scheduling period of the ith reservoir power station are respectively obtained.
7. A reservoir power station peak shaver capacity assessment method based on multiple counter-regulation as set forth in claim 3, wherein the step-down leakage flow constraint is as follows:
wherein: q (Q) N,t 、Q N,t+1 And the leakage flow is respectively reduced in the period t and the period t+1 of the last-stage power station of the step.
8. The reservoir power station peak shaving capacity assessment method based on multiple counter-regulation as set forth in claim 3, wherein the water passing capacity constraint of each reservoir power station unit is as follows:
wherein: q (Q) i,min 、Q i,max The minimum and the maximum discharge flows of the ith reservoir power station are respectively.
9. A method of evaluating peak shaving capacity of a reservoir power station based on multiple counteradjustment as set forth in claim 3, wherein the reservoir power station output constraint is:
wherein N is i,min The minimum allowable output (MW) for the ith reservoir station depends on the type and characteristics of the turbine; n (N) i,max Is the installed capacity (MW) of the ith reservoir station.
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