Hydropower station peak regulation capability analysis method, system, equipment and medium

Abstract

The invention provides a hydropower station peak regulation capability analysis method, system and device and a medium, and the method comprises the steps: selecting a typical daily load curve of a hydropower station through employing a scene synchronization back substitution reduction method according to a daily peak regulation load curve of the hydropower station; constructing a hydropower station power generation scheduling simulation model according to the hydropower station characteristic parameters and the actual operation scheduling data; calculating a dispatching operation process when the hydropower station outputs power and generates power according to a typical daily load curve NS through a hydropower station power generation dispatching simulation model, and finally establishing constraint conditions according to reservoir operation conditions and hydropower station operation conditions based on the hydropower station dispatching operation process. And calculating the peak regulation capability of the hydropower station under the current condition through the hydropower station peak regulation capability calculation model. Reservoir safety and hydropower station operation constraints are comprehensively considered, the result is visual and practical, the peak regulation potential and influence factors of the hydropower station are analyzed from the power generation side, and the peak regulation capacity of the hydropower station can be fully exerted.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower, and relates to a method, system, equipment and medium for analyzing the peak-shaving capacity of a hydropower station. Background Art

[0002] Hydropower stations are ideal peak-shaving power sources in power grids because of their quick start and stop, flexible operation, and fast response to load. In recent years, large-scale grid-connected power generation from wind power and photovoltaics has seriously threatened the safe and stable operation of power grids. Social and economic development has further increased the peak-to-valley difference in power grid loads, and thus power grids have put forward higher requirements for hydropower peak-shaving.

[0003] At present, the analysis of hydropower station peak regulation mainly builds hydropower peak regulation models with single or multiple objectives such as minimizing the maximum value of grid residual load, minimizing residual load variance, reducing load fluctuation, and improving power generation efficiency, and analyzes hydropower peak regulation from the grid side. However, as the power supply end, the hydropower station, the current hydropower station peak regulation analysis method does not combine the power supply load characteristics of the hydropower station, nor does it clarify the peak regulation capacity and constraints of the hydropower station from the power generation side, and does not give full play to the peak regulation capacity of the hydropower station. Summary of the invention

[0004] In order to solve the problem that the peak-shaving capacity analysis method of a hydropower station described in the background technology does not give full play to the peak-shaving capacity of the hydropower station, the present invention provides a peak-shaving capacity analysis method, system, equipment and medium for a hydropower station.

[0005] The method of the present invention comprises:

[0006] According to the daily peak load curve of the hydropower station, a typical daily load curve of the hydropower station is selected by using the scenario synchronization back-substitution reduction method. n};

[0007] According to the characteristic parameters of the hydropower station and the actual operation and dispatching data, a hydropower station power generation dispatching simulation model including power generation simulation and dispatching process simulation is constructed;

[0008] Set the initial operating conditions of the reservoir and the reservoir inflow, and calculate the dispatching operation process of the hydropower station according to the typical daily load curve NS output power generation through the hydropower station power generation dispatching simulation model;

[0009] Constraints are established according to the operating conditions of the reservoir and the hydropower station. Based on the dispatching operation process of the hydropower station when generating electricity according to the typical daily load curve NS, the peak-shaving capacity of the hydropower station under current conditions is calculated through the hydropower station peak-shaving capacity calculation model.

[0010] Furthermore, the characteristic parameters of the hydropower station include the tailwater level-flow relationship curve, the head loss curve, the unit stable operation area, the unit flow curve, and the total number of units in the power station; the actual operation and scheduling data of the hydropower station include the reservoir outflow, the reservoir water level, the power station output, and the downstream reservoir water level of the power station affected by the backwater support.

[0011] Furthermore, the power generation simulation process of the hydropower station power generation scheduling simulation model includes:

[0012] S1, according to the outbound flow Q out , reservoir water level H 水库 , the water level of the downstream reservoir of the power station affected by the backwater support H 下游水库 , using the tailwater level-flow relationship and head loss curve, calculate the gross head H of the hydropower station 毛 and net water head H 净 ;

[0013] S2. According to the stable operation area of ​​the unit, calculate the maximum output N of a single unit in stable operation under the current gross water head high ;

[0014] S3, based on the maximum output N of a single unit in stable operation high and the unit flow curve to determine the current net water head H of a single unit 净 The maximum power generation flow Q under high ;

[0015] S4, according to the outbound flow Q out and the maximum power generation flow of a single unit Q high , calculate the minimum number of power stations to be started Num min :

[0016]

[0017] Among them, INT is the rounding up function;

[0018] S5. Determine the minimum number of startup units Num min Is it less than the total number of units in the power station? total , if Num min ≤Num total ,Number of power stations in operation on Equal to the minimum number of powered-on units Num min , single unit power generation flow Q single equal If Num min >Num total ,Number of power stations in operation on Equal to the total number of units Num total , single unit power flow Q singleEqual to the current net water head H 净 The maximum power generation flow Q under high ;

[0019] S6, based on the power generation flow Q of a single unit single , Clean water head H 净 And the unit overcurrent curve, calculate the output N of a single unit single ;

[0020] S7. Calculate the total power station output N totalTemp :

[0021] N totalTemp =N single *Num on

[0022] S8. Calculate the final total output N of the power station using the model output deviation correction value δ total :

[0023] N total =N totalTemp +δ;

[0024] The calculation method of the model output deviation correction value δ is as follows: according to the actual operation and dispatching data of the hydropower station, the output of the hydropower station is simulated, and the average value of the difference between the actual output of the hydropower station and the simulated output is calculated, which is the model output deviation correction value δ.

[0025] Furthermore, the scheduling process simulation of the hydropower station power generation scheduling simulation model includes:

[0026] S1, given output simulation error threshold N limit , flow calculation step length Q delta 、The maximum full flow of the power station Q max , the minimum discharge flow of the power station Q min ;

[0027] S2, initial water level of the reservoir during the period Reservoir water level at the end of the period Power generation flow Q = {Q1, Q2, ..., Q n}、Power station output and Equal to the initial operating water level of the reservoir H be ;

[0028] S3, let i=1;

[0029] S4, order outbound flow Q temp =Q min ;

[0030] S5. Judge Q temp Is it greater than the maximum full-flow rate Q of the power station? max, if Q temp >Q max ,Determine that the hydropower station cannot meet the load curve power generation process, and end the process, otherwise go to the next step;

[0031] S6. According to the power generation simulation of the hydropower station power generation dispatch simulation model, the outflow flow is calculated as Q temp Power station output N temp ;

[0032] S7. Determine the power station output N temp With load NS i The absolute value of the difference |N temp -NS i Is it less than the error threshold N? limit , if |N temp -NS i | <N limit , then Q i =Q temp Otherwise, Q temp =Q temp +Q delta Repeat steps S5 to S7 until |N temp -NS i | <N limit ;

[0033] S8. Calculate the reservoir water level at the end of the period based on the water balance and water level-reservoir capacity curve

[0034] S9, let i=i+1, Steps S4 to S8 are repeated until i is greater than the load curve length n.

[0035] Furthermore, the initial operating conditions of the reservoir and the reservoir flow conditions include the initial operating water level H of the reservoir. be , the water level of the downstream reservoir affected by backwater H DR , Reservoir inflow conditions Q in .

[0036] Furthermore, the constraint conditions established according to the reservoir operation conditions and the hydropower station operation conditions include: the reservoir operation upper limit water level H up , lower limit water level H low 、Upper limit of daily rise of reservoir water level H dailyincre 、Upper limit of daily drop in reservoir water level H dailydecre .

[0037] Furthermore, the calculation process of the hydropower station peak load regulation capacity calculation model includes:

[0038] S1, the change step size N of the given load curve peak regulation amplitude increase or decrease delta, given the load curve to maintain the lower limit of the peak load amplitude C Low ;

[0039] S2. Calculate the upper limit value C of the peak regulation amplitude of the power station high :

[0040] C high =Ca-min(NS)

[0041] Where Ca is the rated capacity of the power station, min(NS) is the minimum value of the typical load curve;

[0042] S3. Use the hydropower station power generation dispatch simulation model to calculate the dispatch process of the hydropower station according to the typical daily load curve NS output power generation, and determine whether the hydropower station can meet the typical load curve power generation process. If so, use N delta The load curve peak regulation amplitude is increased by step length, and the iterative calculation is performed until the hydropower station cannot meet the load curve power generation process or the load curve peak regulation amplitude is greater than the peak regulation amplitude upper limit C high If not, use N delta The load curve peak regulation amplitude is reduced by step length, and the iterative calculation is performed until the hydropower station can meet the load curve power generation process or the load curve peak regulation amplitude is less than the lower limit of the peak regulation amplitude C Low , jump to step S5;

[0043] S4. The load curve peak regulation amplitude at the end of step S3 is reduced by N delta , obtain the load curve NF, and jump to step S6;

[0044] S5. At the end of step S3, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot generate electricity according to the load curve under the initial operating conditions and inflow of the reservoir, and the process ends; otherwise, the load curve peak regulation amplitude increases by N delta , get the load curve NF;

[0045] S6. Use the hydropower station power generation dispatch simulation model to calculate the dispatch operation process of the hydropower station when generating power according to the load curve NF, and determine whether the final water level of the reservoir is greater than or equal to the lower limit of the reservoir water level H. Low ,like Note that the current load curve is NH, and jump to step S8; if N delta The load curve peak-shaving amplitude is reduced by the step length, and the iterative calculation is performed until the hydropower station can meet the lower limit of the reservoir water level or the load curve peak-shaving amplitude is less than the lower limit of the peak-shaving amplitude C. Low ;

[0046] S7. At the end of step S6, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit CLow , it is determined that the hydropower station cannot meet the lower limit of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends; otherwise, the current load curve is recorded as NH;

[0047] S8. Determine whether the final water level of the reservoir is greater than the upper limit H of the reservoir water level when the hydropower station generates power according to the load curve NH. high ,like If it is determined that the hydropower station cannot meet the upper limit of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, the process ends. Otherwise, proceed to the next step.

[0048] S9. Determine the daily variation of reservoir water level H when the hydropower station generates power according to the load curve NH. dailychange Is it greater than the upper limit of reservoir water level daily rise H? dailyincre , if H dailychange >H dailyincre , it is determined that the hydropower station cannot meet the upper limit of the daily increase of the reservoir water level under the initial operating conditions and the inflow, and the process ends; otherwise, it goes to the next step;

[0049] S10, when judging the power output of the hydropower station according to the load curve NH, the daily change of the reservoir water level H dailychange Whether the limit of daily drop of reservoir water level is exceeded, if H dailychange ≥-H dailydecre , let the load curve NH c =NH, jump to S12; if H dailychange <-H dailydecre , with N delta The load curve peak regulation amplitude is reduced by step length, and the iterative calculation is performed until the hydropower station can meet the daily water level drop limit requirements or the load curve peak regulation amplitude is less than the peak regulation amplitude lower limit C Low , and obtain the load curve NH c ;

[0050] S11. At the end of step S10, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot meet the lower limit requirements of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends; otherwise, it goes to the next step;

[0051] S12, determine the hydropower station according to the load curve NH c Is the final water level of the reservoir greater than the upper limit of the reservoir water level H when generating power? high ,like It is determined that the hydropower station cannot meet the upper limit of the reservoir water level under the initial operating conditions and the inflow, and the process ends; otherwise, it is considered that the current load curve NH c The corresponding peak-shaving amplitude is the maximum peak-shaving capacity of the power station, and the process ends.

[0052] The invention proposes a hydropower station peak load regulation capacity analysis system, which comprises a typical daily load curve selection module, a hydropower station power generation dispatch simulation model construction module, a hydropower station dispatch operation process calculation module and a hydropower station peak load regulation capacity calculation module.

[0053] The typical daily load curve selection module is used to select a typical daily load curve of a hydropower station NS = {NS1, NS2, ..., NS n}.

[0054] The hydropower station power generation dispatch simulation model construction module is used to construct a hydropower station power generation dispatch simulation model including power generation simulation and dispatch process simulation according to characteristic parameters of the hydropower station and actual operation dispatch data.

[0055] The hydropower station dispatching operation process calculation module is used to set the initial operating conditions of the reservoir and the reservoir inflow conditions, and calculate the dispatching operation process of the hydropower station when generating power according to the typical daily load curve NS through the hydropower station power generation dispatching simulation model.

[0056] The hydropower station peak-shaving capacity calculation module is used to establish constraint conditions according to the reservoir operating conditions and the hydropower station operating conditions, and based on the dispatching operation process of the hydropower station when generating power according to the typical daily load curve NS, the hydropower station peak-shaving capacity calculation model is used to calculate the hydropower station peak-shaving capacity under current conditions.

[0057] The present invention also proposes an electronic device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor implements the above-mentioned method and system for analyzing the peak-shaving capacity of a hydropower station by executing the computer instructions.

[0058] The present invention also proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for analyzing the peak-shaving capacity of a hydropower station and the system for analyzing the peak-shaving capacity of a hydropower station.

[0059] Compared with the prior art, the present invention selects a typical daily load curve of a hydropower station according to the daily peak-shaving load curve of the hydropower station by using the scenario synchronous back-substitution reduction method; constructs a hydropower station power generation scheduling simulation model according to the characteristic parameters of the hydropower station and the actual operation scheduling data; calculates the scheduling operation process of the hydropower station when generating power according to the typical daily load curve NS output through the hydropower station power generation scheduling simulation model; finally, based on the scheduling operation process of the hydropower station, constraints are established according to the reservoir operation conditions and the hydropower station operation conditions, and the peak-shaving capacity of the hydropower station under the current conditions is calculated through the hydropower station peak-shaving capacity calculation model. The present invention is aimed at the hydropower station that undertakes the peak-shaving task of the power grid. On the premise of simulating the output of the hydropower station, the scheduling operation process of the hydropower station is simulated according to the load curve, and the maximum peak-shaving capacity of the hydropower station is solved by comprehensively considering the safety of the reservoir and the operation constraints of the hydropower station. The result is intuitive and practical, and the peak-shaving potential and influencing factors of the hydropower station are analyzed from the power generation side, which is conducive to giving full play to the peak-shaving capacity of the hydropower station. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is a flow chart of the method of Example 1 of the present invention.

[0061] Figure 2 This is a system architecture diagram of Example 2 of the present invention.

[0062] Figure 3 This is a typical load curve selected for Example 5 of the present invention.

[0063] Figure 4 This is a result diagram of the output simulation of the hydropower station power generation scheduling simulation model in Example 5 of the present invention.

[0064] Figure 5 This is the dispatching operation process of the hydropower station in Example 5 of the present invention when generating power according to the typical load curve NS. DETAILED DESCRIPTION

[0065] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0066] Example 1

[0067] A method for analyzing the peak load regulation capacity of a hydropower station, the flow chart is as follows: Figure 1 As shown, the specific steps are described in detail below.

[0068] According to the daily peak load curve of the hydropower station, a typical daily load curve of the hydropower station is selected by using the scenario synchronization back-substitution reduction method. n}.

[0069] According to the characteristic parameters of the hydropower station and the actual operation and dispatching data, a hydropower station power generation dispatching simulation model including power generation simulation and dispatching process simulation is constructed.

[0070] Specifically, the characteristic parameters of the hydropower station include: tailwater level-flow relationship curve, head loss curve, unit stable operation area, unit flow curve, and the total number of units in the power station; the actual operation and dispatching data of the hydropower station include: reservoir outflow, reservoir water level, power station output, and the water level of the downstream reservoir of the power station affected by backwater support.

[0071] The power generation simulation process of the hydropower station power generation scheduling simulation model is as follows:

[0072] S1, according to the outbound flow Q out , reservoir water level H 水库 , the water level of the downstream reservoir of the power station affected by the backwater support H 下游水库 , using the tailwater level-flow relationship and head loss curve, calculate the gross head H of the hydropower station 毛 and net water head H 净 ;

[0073] S2. According to the stable operation area of ​​the unit, calculate the maximum output N of a single unit in stable operation under the current gross water head high ;

[0074] S3, based on the maximum output N of a single unit in stable operation high and the unit flow curve to determine the current net water head H of a single unit 净 The maximum power generation flow Q under high ;

[0075] S4, according to the outbound flow Q out and the maximum power generation flow of a single unit Q high , calculate the minimum number of power stations to be started Num min :

[0076]

[0077] Among them, INT is the rounding up function;

[0078] S5. Determine the minimum number of startup units Num min Is it less than the total number of units in the power station? total , if Num min ≤Num total ,Number of power stations in operation on Equal to the minimum number of powered-on units Num min , single unit power generation flow Q single equal If Num min >Num total,Number of power stations in operation on Equal to the total number of units Num total , single unit power flow Q single Equal to the current net water head H 净 The maximum power generation flow Q under high ;

[0079] S6, based on the power generation flow Q of a single unit single , Clean water head H 净 And the unit overcurrent curve, calculate the output N of a single unit single ;

[0080] S7. Calculate the total power station output N totalTemp :

[0081] N totalTemp =N single *Num on

[0082] S8. Calculate the final total output N of the power station using the model output deviation correction value δ total :N total =N totalTemp +δ;

[0083] The calculation method of the model output deviation correction value δ is as follows: according to the actual operation and dispatching data of the hydropower station, the output of the hydropower station is simulated, and the average value of the difference between the actual output of the hydropower station and the simulated output is calculated, which is the model output deviation correction value δ.

[0084] The dispatching process of the hydropower station power generation dispatching simulation model is simulated as follows:

[0085] S1, given output simulation error threshold N limit , flow calculation step length Q delta 、The maximum full flow of the power station Q max , the minimum discharge flow of the power station Q min ;

[0086] S2, initial water level of the reservoir during the period Reservoir water level at the end of the period Power generation flow Q = {Q1, Q2, ..., Q n}、Power station output and Equal to the initial operating water level of the reservoir H be ;

[0087] S3, let i=1;

[0088] S4, order outbound flow Q temp =Q min ;

[0089] S5. Judge Qtemp Is it greater than the maximum full-flow rate Q of the power station? max , if Q temp >Q max ,Determine that the hydropower station cannot meet the load curve power generation process, and end the process, otherwise go to the next step;

[0090] S6. According to the power generation simulation of the hydropower station power generation dispatch simulation model, the outflow flow is calculated as Q temp Power station output N temp ;

[0091] S7. Determine the power station output N temp With load NS i The absolute value of the difference |N temp -NS i Is it less than the error threshold N? limit , if |N temp -NS i | <N limit , then Q i =Q temp Otherwise, Q temp =Q temp +Q delta Repeat steps S5 to S7 until |N temp -NS i | <N limit ;

[0092] S8. Calculate the reservoir water level at the end of the period based on the water balance and water level-reservoir capacity curve

[0093] S9, let i=i+1, Steps S4 to S8 are repeated until i is greater than the load curve length n.

[0094] The initial operating conditions and inflow of the reservoir are set, and the dispatching operation process of the hydropower station when generating power according to the typical daily load curve NS is calculated through the hydropower station power generation dispatching simulation model.

[0095] Specifically, the initial operating conditions of the reservoir and the reservoir inflow conditions include the initial operating water level H be , the water level of the downstream reservoir affected by backwater H DR , Reservoir inflow conditions Q in .

[0096] Constraints are established according to the operating conditions of the reservoir and the hydropower station. Based on the dispatching operation process of the hydropower station when generating electricity according to the typical daily load curve NS, the peak-shaving capacity of the hydropower station under current conditions is calculated through the hydropower station peak-shaving capacity calculation model.

[0097] Specifically, the constraints for establishing the reservoir operation conditions and the hydropower station operation conditions are: the upper limit water level of the reservoir operation H up , lower limit water level H low 、Upper limit of daily rise of reservoir water level H dailyincre 、Upper limit of daily drop in reservoir water level H dailydecre .

[0098] The calculation process of the peak load regulation capacity calculation model of the hydropower station is as follows:

[0099] S1, the change step size N of the given load curve peak regulation amplitude increase or decrease delta , given the load curve to maintain the lower limit of the peak load amplitude C Low ;

[0100] S2. Calculate the upper limit value C of the peak regulation amplitude of the power station high :

[0101] C high =Ca-min(NS)

[0102] Where Ca is the rated capacity of the power station, min(NS) is the minimum value of the typical load curve;

[0103] S3. Use the hydropower station power generation dispatch simulation model to calculate the dispatch operation process of the hydropower station according to the typical daily load curve NS output power generation, and determine whether the hydropower station can meet the typical load curve power generation process. If so, use N delta The load curve peak regulation amplitude is increased by step length, and the iterative calculation is performed until the hydropower station cannot meet the load curve power generation process or the load curve peak regulation amplitude is greater than the peak regulation amplitude upper limit C high If not, use N delta The load curve peak regulation amplitude is reduced by step length, and the iterative calculation is performed until the hydropower station can meet the load curve power generation process or the load curve peak regulation amplitude is less than the lower limit of the peak regulation amplitude C Low , jump to step S5;

[0104] S4. The load curve peak regulation amplitude at the end of step S3 is reduced by N delta , obtain the load curve NF, and jump to step S6;

[0105] S5. At the end of step S3, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot generate electricity according to the load curve under the initial operating conditions and inflow of the reservoir, and the process ends; otherwise, the load curve peak regulation amplitude increases by N delta , get the load curve NF;

[0106] S6. Use the hydropower station power generation dispatch simulation model to calculate the dispatch operation process of the hydropower station when generating power according to the load curve NF, and determine whether the final water level of the reservoir is greater than or equal to the lower limit of the reservoir water level H. Low ,like Note that the current load curve is NH, and jump to step S8; if N delta The load curve peak-shaving amplitude is reduced by the step length, and the iterative calculation is performed until the hydropower station can meet the lower limit of the reservoir water level or the load curve peak-shaving amplitude is less than the lower limit of the peak-shaving amplitude C. Low ;

[0107] S7. At the end of step S6, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot meet the lower limit of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends; otherwise, the current load curve is recorded as NH;

[0108] S8. Determine whether the final water level of the reservoir is greater than the upper limit H of the reservoir water level when the hydropower station generates power according to the load curve NH. high ,like If it is determined that the hydropower station cannot meet the upper limit of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, the process ends. Otherwise, proceed to the next step.

[0109] S9. Determine the daily variation of reservoir water level H when the hydropower station generates power according to the load curve NH. dailychange Is it greater than the upper limit of reservoir water level daily rise H? dailyincre , if H dailychange >H dailyincre , it is determined that the hydropower station cannot meet the upper limit of the daily increase of the reservoir water level under the initial operating conditions and the inflow, and the process ends; otherwise, it goes to the next step;

[0110] S10, when judging the power output of the hydropower station according to the load curve NH, the daily change of the reservoir water level H dailychange Whether the limit of daily drop of reservoir water level is exceeded, if H dailychange ≥-H dailydecre , let the load curve NH c =NH, jump to S12; if H dailychange <-H dailydecre , with N delta The load curve peak regulation amplitude is reduced by step length, and the iterative calculation is performed until the hydropower station can meet the daily water level drop limit requirements or the load curve peak regulation amplitude is less than the peak regulation amplitude lower limit C Low , and obtain the load curve NH c ;

[0111] S11. At the end of step S10, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot meet the lower limit requirements of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends; otherwise, it goes to the next step;

[0112] S12, determine the hydropower station according to the load curve NH c Is the final water level of the reservoir greater than the upper limit of the reservoir water level H when generating power? high ,like It is determined that the hydropower station cannot meet the upper limit of the reservoir water level under the initial operating conditions and the inflow, and the process ends; otherwise, it is considered that the current load curve NH c The corresponding peak-shaving amplitude is the maximum peak-shaving capacity of the power station, and the process ends.

[0113] Example 2

[0114] The present invention also proposes a hydropower station peak load capacity analysis system, the architecture diagram of which is as follows: Figure 2 As shown, it consists of a typical daily load curve selection module, a hydropower station power generation scheduling simulation model construction module, a hydropower station scheduling operation process calculation module and a hydropower station peak load regulation capacity calculation module.

[0115] The typical daily load curve selection module is used to select a typical daily load curve of a hydropower station according to the daily peak load curve of the hydropower station using the scenario synchronization back-substitution reduction method. n}.

[0116] The hydropower station power generation dispatching simulation model construction module is used to construct a hydropower station power generation dispatching simulation model including power generation simulation and dispatching process simulation according to the characteristic parameters of the hydropower station and the actual operation dispatching data.

[0117] The hydropower station dispatching and operation process calculation module is used to set the initial operating conditions of the reservoir and the reservoir inflow conditions, and calculate the dispatching and operation process of the hydropower station when it generates power according to the typical daily load curve NS through the hydropower station power generation dispatching simulation model.

[0118] The hydropower station peak-shaving capacity calculation module is used to establish constraints according to the reservoir operating conditions and the hydropower station operating conditions. Based on the dispatching operation process of the hydropower station when generating power according to the typical daily load curve NS, the hydropower station peak-shaving capacity calculation model is used to calculate the hydropower station peak-shaving capacity under current conditions.

[0119] The specific implementation method of each module in the system of Example 2 is the same as that described in Example 1 and will not be repeated here.

[0120] Example 3

[0121] The present invention also proposes an electronic device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor implements the above-mentioned method and system for analyzing the peak-shaving capacity of a hydropower station by executing the computer instructions.

[0122] Example 4

[0123] The present invention also proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for analyzing the peak-shaving capacity of a hydropower station and the system for analyzing the peak-shaving capacity of a hydropower station.

[0124] Example 5

[0125] Taking a peak-shaving hydropower station as an example, the peak-shaving capacity of the hydropower station is analyzed by using the present invention.

[0126] (1) According to the daily peak load curve of the hydropower station, a typical daily load curve of the hydropower station is selected by using the scenario synchronization back-substitution reduction method. n}, and give the lower limit value C of the peak load amplitude that keeps the load curve shape Low =0, Figure 3 The typical load curve is selected.

[0127] (2) Based on the characteristic parameters of the hydropower station and the actual operation and dispatching data, a hydropower station power generation dispatching simulation model is constructed. The model includes power generation simulation and dispatching process simulation. The characteristic parameters of the hydropower station are: tailwater level-flow relationship curve, head loss curve, unit stable operation area, unit flow curve, and the total number of units in the power station. The actual operation and dispatching data of the hydropower station are: reservoir outflow, reservoir water level, power station output, and downstream reservoir water level. Figure 4 This is the result diagram of the output simulation of the hydropower station power generation scheduling simulation model.

[0128] (3) Set the initial operating water level of the reservoir H be =765m, downstream reservoir water level H DR =570m, reservoir flow Q in =7000m 3 / s and uniform inflow, the minimum downstream flow Q of the hydropower station in the power generation dispatch simulation model min The minimum ecological discharge flow of the power station is 1160m 3 / s, through the hydropower station power generation dispatch simulation model, the dispatch operation process of the hydropower station when generating power according to the load curve NS is calculated. The dispatch operation process of the hydropower station is as follows: Figure 5 shown.

[0129] (4) According to the upper limit water level of the reservoir H up =825m, lower limit water level H low =765m, upper limit of daily rise of reservoir water level H dailyincre =3m, upper limit of daily drop in reservoir water level H dailydecre =2m, based on the dispatching operation process of the hydropower station when generating electricity according to the typical daily load curve NS, through the hydropower station peak-shaving capacity calculation model, it is calculated that the hydropower station peak-shaving capacity under current conditions is 4.7 million kW.

[0130] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the application can adopt the form of complete hardware embodiment, complete software embodiment, or the embodiment in combination with software and hardware. Moreover, the application can adopt the form of the computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiment of the present application can be implemented in various computer languages, for example, object-oriented programming language Java, C++, Python and literal scripting language JavaScript, etc.

[0131] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0132] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0133] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0134] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0135] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for analyzing the peak load capacity of a hydropower station, characterized in that: include: According to the daily peak load curve of the hydropower station, a typical daily load curve of the hydropower station is selected by using the scenario synchronization back-substitution reduction method. n }; According to the characteristic parameters of the hydropower station and the actual operation and dispatching data, a hydropower station power generation dispatching simulation model including power generation simulation and dispatching process simulation is constructed; Set the initial operating conditions of the reservoir and the reservoir inflow, and calculate the dispatching operation process of the hydropower station according to the typical daily load curve NS output power generation through the hydropower station power generation dispatching simulation model; Constraints are established according to the operating conditions of the reservoir and the hydropower station. Based on the dispatching operation process of the hydropower station when generating electricity according to the typical daily load curve NS, the peak-shaving capacity of the hydropower station under current conditions is calculated through the hydropower station peak-shaving capacity calculation model.

2. A method for analyzing the peak load capacity of a hydropower station according to claim 1, characterized in that: The characteristic parameters of the hydropower station include the tailwater level-flow relationship curve, the head loss curve, the unit stable operation area, the unit flow curve, and the total number of units in the power station; the actual operation and scheduling data of the hydropower station include the reservoir outflow, the reservoir water level, the power station output, and the downstream reservoir water level of the power station affected by the backwater support.

3. A method for analyzing the peak load capacity of a hydropower station according to claim 1, characterized in that: The power generation simulation process of the hydropower station power generation scheduling simulation model includes: S1, according to the outbound flow Q out , reservoir water level H 水库 , the water level of the downstream reservoir of the power station affected by the backwater support H 下游水库 , using the tailwater level-flow relationship and head loss curve, calculate the gross head H of the hydropower station 毛 and net water head H 净 ; S2. According to the stable operation area of ​​the unit, calculate the maximum output N of a single unit in stable operation under the current gross water head high ; S3, based on the maximum output N of a single unit in stable operation high and the unit flow curve to determine the current net water head H of a single unit 净 The maximum power generation flow Q under high ; S4, according to the outbound flow Q out and the maximum power generation flow of a single unit Q high , calculate the minimum number of power stations to be started Num min : Among them, INT is the rounding up function; S5. Determine the minimum number of startup units Num min Is it less than the total number of units in the power station? total , if Num min ≤Num total ,Number of power stations in operation on Equal to the minimum number of powered-on units Num min , single unit power generation flow Q single equal If Num min >Num total ,Number of power stations in operation on Equal to the total number of units Num total , single unit power flow Q single Equal to the current net water head H 净 The maximum power generation flow Q under high ; S6, based on the power generation flow Q of a single unit single , Clean water head H 净 And the unit overcurrent curve, calculate the output N of a single unit single ; S7. Calculate the total power station output N totalTemp : N totalTemp =N single *Num on S8. Calculate the final total output N of the power station using the model output deviation correction value δ total : N total =N totalTemp +d; The calculation method of the model output deviation correction value δ is as follows: according to the actual operation and dispatching data of the hydropower station, the output of the hydropower station is simulated, and the average value of the difference between the actual output of the hydropower station and the simulated output is calculated, which is the model output deviation correction value δ.

4. A method for analyzing the peak load capacity of a hydropower station according to claim 1, characterized in that: The scheduling process simulation of the hydropower station power generation scheduling simulation model includes: S1, given output simulation error threshold N limit , flow calculation step length Q delta 、The maximum full flow of the power station Q max , the minimum discharge flow of the power station Q min ; S2, initial water level of the reservoir during the period Reservoir water level at the end of the period Power generation flow Q = {Q1, Q2, ..., Q n }、Power station output and Equal to the initial operating water level of the reservoir H be ; S3, let i=1; S4, order outbound flow Q temp =Q min ; S5. Judge Q temp Is it greater than the maximum full-flow rate Q of the power station? max , if Q temp >Q max ,Determine that the hydropower station cannot meet the load curve power generation process, and end the process, otherwise go to the next step; S6. According to the power generation simulation of the hydropower station power generation dispatch simulation model, the outflow flow is calculated as Q temp Power station output N temp ; S7. Determine the power station output N temp With load NS i The absolute value of the difference |N temp -NS i Is it less than the error threshold N? limit , if |N temp -NS i | <N limit , then Q i =Q temp Otherwise, Q temp =Q temp +Q delta Repeat steps S5 to S7 until |N temp -NS i | <N limit ; S8. Calculate the reservoir water level at the end of the period based on the water balance and water level-reservoir capacity curve S9, let i=i+1, Steps S4 to S8 are repeated until i is greater than the load curve length n.

5. A method for analyzing the peak load capacity of a hydropower station according to claim 1, characterized in that: The initial operating conditions of the reservoir and the reservoir flow conditions include the initial operating water level H be , the water level of the downstream reservoir affected by backwater H DR , Reservoir inflow conditions Q in .

6. A method for analyzing the peak load capacity of a hydropower station according to claim 1, characterized in that: The constraint conditions established according to the reservoir operation conditions and the hydropower station operation conditions include: the reservoir operation upper limit water level H up , lower limit water level H low 、Upper limit of daily rise of reservoir water level H dailyincre 、Upper limit of daily drop in reservoir water level H dailydecre .

7. A method for analyzing the peak load capacity of a hydropower station according to claim 1, characterized in that: The calculation process of the hydropower station peak load regulation capacity calculation model includes: S1, the change step size N of the given load curve peak regulation amplitude increase or decrease delta , given the load curve to maintain the lower limit of the peak load amplitude C Low ; S2. Calculate the upper limit value C of the peak regulation amplitude of the power station high : C high =Ca-min(NS) Where Ca is the rated capacity of the power station, min(NS) is the minimum value of the typical load curve; S3. Use the hydropower station power generation dispatch simulation model to calculate the dispatch operation process of the hydropower station according to the typical daily load curve NS output power generation, and determine whether the hydropower station can meet the typical load curve power generation process. If so, use N delta The load curve peak regulation amplitude is increased by step length, and the iterative calculation is performed until the hydropower station cannot meet the load curve power generation process or the load curve peak regulation amplitude is greater than the peak regulation amplitude upper limit C high If not, use N delta The load curve peak regulation amplitude is reduced by step length, and the iterative calculation is performed until the hydropower station can meet the load curve power generation process or the load curve peak regulation amplitude is less than the lower limit of the peak regulation amplitude C Low , jump to step S5; S4. The load curve peak regulation amplitude at the end of step S3 is reduced by N delta , obtain the load curve NF, and jump to step S6; S5. At the end of step S3, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot generate electricity according to the load curve under the initial operating conditions and inflow of the reservoir, and the process ends; otherwise, the load curve peak regulation amplitude increases by N delta , get the load curve NF; S6. Use the hydropower station power generation dispatch simulation model to calculate the dispatch operation process of the hydropower station when generating power according to the load curve NF, and determine whether the final water level of the reservoir is greater than or equal to the lower limit of the reservoir water level H. Low If the final water level of the reservoir ≥ reservoir water level lower limit H Low , record the current load curve as NH, and jump to step S8; if the reservoir water level <Reservoir water level lower limit H Low , with N delta The load curve peak-shaving amplitude is reduced by the step length, and the iterative calculation is performed until the hydropower station can meet the lower limit of the reservoir water level or the load curve peak-shaving amplitude is less than the lower limit of the peak-shaving amplitude C. Low ; S7. At the end of step S6, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot meet the lower limit of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends; otherwise, the current load curve is recorded as NH; S8. Determine whether the final water level of the reservoir is greater than the upper limit H of the reservoir water level when the hydropower station generates power according to the load curve NH. high If the final water level of the reservoir >Upper limit of reservoir water level H high , it is determined that the hydropower station cannot meet the upper limit of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends. Otherwise, it goes to the next step; S9. Determine the daily variation of reservoir water level H when the hydropower station generates power according to the load curve NH. dailychange Is it greater than the upper limit of reservoir water level daily rise H? dailyincre , if H dailychange >H dailyincre , it is determined that the hydropower station cannot meet the upper limit of the daily increase of the reservoir water level under the initial operating conditions and the inflow, and the process ends; otherwise, it goes to the next step; S10, when judging the power output of the hydropower station according to the load curve NH, the daily change of the reservoir water level H dailychange Whether the limit of daily drop of reservoir water level is exceeded, if H dailychange ≥-H dailydecre , let the load curve NH c =NH, jump to S12; if H dailychange <-H dailydecre , with N delta The load curve peak regulation amplitude is reduced by step length, and the iterative calculation is performed until the hydropower station can meet the daily water level drop limit requirements or the load curve peak regulation amplitude is less than the peak regulation amplitude lower limit C Low , and obtain the load curve NH c ; S11. At the end of step S10, if the load curve peak-shaving amplitude is less than the peak-shaving amplitude lower limit C Low , it is determined that the hydropower station cannot meet the lower limit requirements of the reservoir water level under the initial operating conditions and the incoming flow of the reservoir, and the process ends; otherwise, it goes to the next step; S12, determine the hydropower station according to the load curve NH c Is the final water level of the reservoir greater than the upper limit of the reservoir water level H when generating power? high If the final water level of the reservoir >Upper limit of reservoir water level H high , it is determined that the hydropower station cannot meet the upper limit of the reservoir water level under the initial operating conditions and the inflow, and the process ends; otherwise, it is considered that the current load curve NH c The corresponding peak-shaving amplitude is the maximum peak-shaving capacity of the power station, and the process ends.

8. A hydropower station peak load capacity analysis system, characterized by: It includes a typical daily load curve selection module, a hydropower station power generation dispatch simulation model construction module, a hydropower station dispatch operation process calculation module and a hydropower station peak load regulation capacity calculation module; The typical daily load curve selection module is used to select a typical daily load curve of a hydropower station NS = {NS1, NS2, ..., NS n }; The hydropower station power generation dispatch simulation model construction module is used to construct a hydropower station power generation dispatch simulation model including power generation simulation and dispatch process simulation according to the characteristic parameters of the hydropower station and the actual operation dispatch data; The hydropower station dispatching operation process calculation module is used to set the initial operating conditions of the reservoir and the reservoir flow conditions, and calculate the dispatching operation process of the hydropower station when generating power according to the typical daily load curve NS through the hydropower station power generation dispatching simulation model; The hydropower station peak-shaving capacity calculation module is used to establish constraint conditions according to the reservoir operating conditions and the hydropower station operating conditions, and based on the dispatching operation process of the hydropower station when generating power according to the typical daily load curve NS, the hydropower station peak-shaving capacity calculation model is used to calculate the hydropower station peak-shaving capacity under current conditions.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor implements a method for analyzing the peak-shaving capacity of a hydropower station as described in any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a method for analyzing the peak-shaving capacity of a hydropower station as described in any one of claims 1 to 7 is implemented.

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