Operation control method of pumped storage irrigation system equipped with wind power and photovoltaic power generation

Abstract

The present invention proposes an operation control method for a pumped-storage irrigation system equipped with wind power and photovoltaic power generation. First, the wind force, sunshine intensity and conventional load power consumption of the power grid on the second day are investigated and obtained, and the multi-dimensional impact constraints of environmental factors are established. The wind power generation power and photovoltaic power generation power are calculated, and the irrigation water consumption on the second day is predicted and calculated; then, the operation characteristics of the pumped-storage irrigation system are analyzed, the operation model of the pumped-storage irrigation system is established, and the operation model of the conventional generator set and the power balance constraint of the power grid are constructed; on the above basis, the pumped-storage irrigation system is controlled with the goal of minimizing the daily operation cost of the system. The operation control method of the present invention fully considers the multi-dimensional impact of wind force and sunshine intensity meteorological factors on photovoltaic power generation, wind power, irrigation water consumption and conventional generator sets, significantly improves the economic efficiency of system operation, and also has rich reference value in engineering applications.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power and water conservancy engineering, and relates to an operation control method of a pumped storage irrigation system. Background Art

[0002] Driven by the energy crisis and environmental protection needs, high penetration rates of wind power and photovoltaic power generation have been integrated into the power grid. Considering the randomness, volatility and anti-peak characteristics of renewable energy generation, pumped storage power stations have been built in some areas to participate in the peak-shaving and valley-filling of the power grid. It can be seen that how to optimize the operation of pumped storage power stations and improve the economic operation of pumped storage irrigation systems combined with wind power and photovoltaic power generation is of great practical significance.

[0003] At present, the operation and control of the pumped-storage irrigation system combining wind power and photovoltaic power generation rarely considers the irrigation needs of local residents who draw water from the reservoir. Residents drawing water from the reservoir will reduce the water volume of the reservoir, affecting the power generation of the pumped-storage power station. In addition, the existing operation and control methods generally ignore the multi-dimensional influence of meteorological factors such as sunshine intensity and wind power. Sunshine intensity will affect photovoltaic power generation, wind power will affect wind power generation, and then it will also affect irrigation water consumption, which will affect the operation of the pumped-storage power station. Summary of the invention

[0004] In order to solve the problem described in the background technology, the present invention proposes an operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation.

[0005] The technical solution of the present invention comprises the following steps:

[0006] Obtain the wind speed, sunshine intensity and conventional load power consumption of the power grid on the next day;

[0007] The wind power generation and photovoltaic power generation are calculated based on the wind force and sunshine intensity;

[0008] The irrigation water consumption for the next day is predicted and calculated based on the survey data of irrigation water consumption and sunshine intensity in the same season in the past;

[0009] According to the operation characteristics of the pumped-storage irrigation system, the working model of the pumped-storage irrigation system, the operation model of the conventional generator set and the balance constraint of the power generation and power consumption of the power grid are established, and the operation control model of the pumped-storage irrigation system with the minimum daily operation cost of the system as the objective function is established;

[0010] Solve the operation control model of the pumped-storage irrigation system to obtain the day-ahead operating power value of the conventional generator set, the day-ahead operating power value of the pumped-storage power station, and the day-ahead operating power value of the pumped load;

[0011] The operation of the pumped-storage irrigation system is controlled based on the obtained day-ahead operating power values ​​of conventional generator sets, the day-ahead operating power values ​​of pumped-storage power stations, and the day-ahead operating power values ​​of pumped loads.

[0012] Furthermore, the wind force, sunshine intensity and conventional load power consumption of the power grid on the second day are expressed as a set A:

[0013]

[0014] Among them, v1,v2,...,v t Indicates the wind speed at each time of the next day, G1, G2, ..., G t Indicates the sunshine intensity at each time of the next day, P1 L ,P2 L ,...,P t L Indicates the normal load power consumption at various times of the next day.

[0015] Furthermore, the wind power generation power and photovoltaic power generation power are:

[0016]

[0017] P t PV =P STC G t [1+ε(T c,t -T r )] / G STC ,

[0018] Among them, P t WT is the wind power generation power at time t; t is the wind speed at time t; υ r and Respectively represent the cut-in wind speed, rated wind speed and cut-out wind speed; P t PV is the photovoltaic power generation power at time t; P STC G is the maximum test power output per unit photovoltaic installed capacity under standard test conditions; STC is the sunshine intensity under standard test conditions; ε is the power temperature coefficient; T c,t is the operating temperature of the solar panel at time t; T r is the reference temperature.

[0019] Furthermore, the prediction calculation method of the irrigation water consumption on the second day is:

[0020] ① Retrieve the data of irrigation water consumption and sunshine intensity in the same season in the past, and draw relevant curves on the two-dimensional coordinate system;

[0021] ② Based on the MATLAB platform, polynomial fitting was used to fit the sunshine intensity-irrigation water consumption curve and determine the coefficient a i (i=1,2,...,5);

[0022] ③ Based on the fitting curve of sunshine intensity-irrigation water consumption and the obtained sunshine intensity of the power grid on the second day, the irrigation water consumption on the second day is obtained as follows:

[0023] Q t =a1G t +a2(G t ) 2 +a3(G t ) 3 +a4(G t ) 4 +a5(G t ) 5 ,

[0024] Among them, Q t is the irrigation water consumption at time t on the second day, G t is the sunshine intensity at time t on the next day.

[0025] Furthermore, in the working model of the pumped-storage irrigation system, the power constraint corresponding to the pumped-storage operation mode of the pumped-storage irrigation system is:

[0026]

[0027] The power constraint corresponding to the power generation operation mode of the pumped storage irrigation system is:

[0028]

[0029] The constraint that the pumped storage irrigation system can only operate in the pumped storage operation mode or the power generation operation mode at any time is:

[0030]

[0031] The ramp rate constraint of the pumped storage irrigation system is:

[0032] -ΔP WP ≤P t WP,c -P t WP,d ≤ΔP WP ;

[0033] The relationship between the reservoir water storage value of the pumped storage irrigation system and the working power of the pumped storage power station and the irrigation water consumption is:

[0034]

[0035] The reservoir capacity constraint of the pumped storage irrigation system is:

[0036]

[0037] Among them, P t WP,c and P t WP,d are the pumped storage power and power generation power of the pumped storage power station at time t, Indicates the rated working power of the pumped storage power station, Boolean variable and They represent the working mode of the pumped storage power station at time t, ΔP WP represents the ramp rate of the pumped storage power station, η c and η d are the energy-water conversion and water-energy conversion efficiency of the pumped storage power station, W t Lake , and They represent the water storage, minimum water storage and maximum water storage value of the reservoir at time t respectively.

[0038] Furthermore, in the conventional generator set operation model, the operating range of the conventional generator set is:

[0039]

[0040] The ramp rate constraint of conventional generator sets is:

[0041]

[0042] Among them, P t MT Indicates the operating power of the conventional generator set at time t, Indicates the maximum allowable operating power of a conventional generator set, ΔP MT Indicates the rated ramp rate of a conventional generator set;

[0043] The balance constraint between the power generation and power consumption of the power grid is:

[0044] P t WT +P t PV +P t MT +P t WP,d -P t WP,c =P t L +P t SL ,

[0045] Among them, P t SL represents the irrigation load at time t, Indicates the rated operating power of the irrigation load. E SL Indicates the total daily electricity consumption of irrigation load.

[0046] Furthermore, the pumped storage irrigation system operation control model takes the minimum daily operation cost of the system as the optimization goal, and the objective function can be expressed as:

[0047]

[0048]

[0049] in, represents the operating cost of the conventional generator set at time t, and b3, b2, b1 and b0 are the power generation characteristic parameters of the conventional generator.

[0050] Furthermore, the solution method of the pumped storage irrigation system operation control model is:

[0051] ①Define the function f(P t MT ) satisfies the following formula:

[0052] f(P t MT )=b3(P t MT ) 3 +b2(P t MT ) 2 +b1(P t MT )+b0,

[0053] Among them, P t MT Indicates the operating power of the conventional generator set at time t;

[0054] ②According to the operating power range of conventional generator sets K+1 breakpoint powers are set at equal intervals, which satisfy the following relationship:

[0055]

[0056] ③For any power P t MT , can be expressed by the superposition combination of breakpoint powers under different weights:

[0057]

[0058] in, represents the power weight corresponding to the breakpoint k;

[0059] ④The operating cost of a conventional generator set can be expressed as:

[0060]

[0061] Then, the optimization problem is characterized by coding based on the MATALB platform, and the commercial solver Gurobi is called by yalmip software to obtain the operating power value when the operating cost of the generator set is the lowest.

[0062] Furthermore, the power weight corresponding to the breakpoint k is The following constraints are met:

[0063] ① The actual operating power of conventional generator sets can only fall within a single power range:

[0064]

[0065] ②The sum of the breakpoint power point weights is equal to 1:

[0066]

[0067] ③Only adjacent fixed power points are allowed to participate in linear combination:

[0068]

[0069]

[0070]

[0071]

[0072] Among them, Boolean variables Used to identify the specific operating power range of conventional generator sets.

[0073] Compared with the prior art, the present invention proposes an operation control method for a pumped-storage irrigation system. First, the wind force, sunshine intensity and conventional load power consumption of the power grid on the second day are investigated and obtained, multi-dimensional impact constraints of environmental factors are established, wind power generation power and photovoltaic power generation power are calculated, and the irrigation water consumption on the second day is predicted and calculated; then, the operation characteristics of the pumped-storage irrigation system are quantitatively analyzed, and an operation model of the pumped-storage irrigation system is established; in addition, an operation model of the generator set is constructed; on the above basis, the pumped-storage irrigation system is operated and controlled with the goal of minimizing the daily operation cost of the system.

[0074] The operation control method of the present invention fully considers the multi-dimensional impact of wind and sunshine intensity meteorological factors on photovoltaic power generation, wind power, irrigation water consumption and conventional generator sets, and controls the operation of the pumped-storage irrigation system with the goal of minimizing the daily operation cost of the system, which significantly improves the operation economy of the pumped-storage irrigation system and has rich reference value in engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 The wind force-time curve graph and the light intensity-time curve graph of the power grid on the second day obtained in the embodiment of the present invention;

[0076] Figure 2 This is an irrigation load power-time curve diagram in an embodiment of the present invention.

[0077] Figure 3 It is the operating power-time variation diagram of the pumped storage irrigation system of the present invention. DETAILED DESCRIPTION

[0078] The implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention, but are only examples. At the same time, through the description, the advantages of the present invention will be more clearly understood. All deformations that can be directly derived or associated with the contents disclosed by ordinary technicians in the field should be considered as the protection scope of the present invention. The positional relationships described in the embodiments are consistent with those shown in the drawings, and other parts not described in detail in the embodiments are all prior art.

[0079] 1. Investigate and obtain the wind speed, sunshine intensity and conventional load power consumption of the power grid on the second day, and express them as set A:

[0080]

[0081] Among them, v1,v2,...,v t Indicates the wind speed at each time of the next day, G1, G2, ..., G t Indicates the sunshine intensity at each time of the next day, P1 L ,P2 L ,...,P t L Indicates the normal load power consumption at various times of the next day.

[0082] In this embodiment, the wind power-time curve and light intensity-time curve of the power grid on the second day are obtained as follows: Figure 1 shown.

[0083] 2. Quantitatively analyze the effects of meteorological factors and establish multi-dimensional impact constraints on environmental factors.

[0084] First, according to the formulas for wind power generation and photovoltaic power generation, the renewable energy power generation power of the day before is calculated as:

[0085]

[0086] P t PV =P STC G t [1+ε(T c,t -T r )] / G STC ③,

[0087] Among them, P t WT is the wind power generation power at time t; t is the wind speed at time t; υ r and Represents cut-in wind speed, rated wind speed and cut-out wind speed; P t PV is the photovoltaic power generation at time t; P STC G is the maximum test power output per unit photovoltaic installed capacity under standard test conditions; STC is the sunshine intensity under standard test conditions; ε is the power temperature coefficient; T c,t is the operating temperature of the solar panel at time t; T r is the reference temperature.

[0088] 3. Predict and calculate the irrigation water consumption for the next day.

[0089] First, we investigated the data on irrigation water consumption and sunshine intensity of local residents in the same season in the past, and drew relevant curves on a two-dimensional coordinate system.

[0090] Then, based on the MATLAB platform, polynomial fitting was used to fit the sunshine intensity-irrigation water consumption curve to determine the coefficient a i (i=1,2,...,5).

[0091] Finally, based on the fitting curve of sunshine intensity-irrigation water consumption and the obtained sunshine intensity of the power grid on the second day, the irrigation water consumption on the second day is obtained as follows:

[0092] Q t =a1G t +a2(G t ) 2 +a3(G t ) 3 +a4(G t ) 4 +a5(G t ) 5 ④,

[0093] Among them, Q t is the irrigation water consumption at time t on the second day, G t is the sunshine intensity at time t on the next day.

[0094] 4. Based on the operating characteristics of the pumped-storage irrigation system, establish a working model of the pumped-storage irrigation system.

[0095] Considering that the current operation model of the pumped storage irrigation system is relatively complex, which brings great trouble to the solution, the present invention proposes a simplified pumped storage irrigation system working model, as shown in equations (5) to (10). Among them, equations (5) and (6) represent the power constraints corresponding to the two operation modes of pumped storage and power generation of the pumped storage power station, equation (7) limits the pumped storage power station to only work in the pumped storage state or the power generation state at any time, equation (8) represents the ramp rate constraint of the pumped storage power station, equation (9) represents the relationship between the reservoir water storage value and the working power and irrigation water consumption of the pumped storage power station, and equation (10) represents the reservoir capacity limit.

[0096]

[0097]

[0098]

[0099] -ΔP WP ≤P t WP,c -P t WP,d ≤ΔP WP ⑧,

[0100]

[0101]

[0102] Among them, P t WP,c and P t WP,d are the pumped storage power and power generation power of the pumped storage power station at time t, Indicates the rated working power of the pumped storage power station, Boolean variable I t WP,c and I t WP,d They represent the working mode of the pumped storage power station at time t, ΔP WP represents the ramp rate of the pumped storage power station, η c and η d are the energy-water conversion and water-energy conversion efficiency of the pumped storage power station, W t Lake , and They represent the water storage, minimum water storage and maximum water storage value of the reservoir at time t respectively.

[0103] 5. Construct the operation model of conventional generator sets and the balance constraints of power generation and power consumption of the power grid.

[0104] First, a conventional generator set operation model is constructed, as shown in Eq. and As shown, Indicates that conventional generator sets must work within the allowable range. Represents the ramp rate constraint of conventional generator sets:

[0105]

[0106]

[0107] Where P t MT Indicates the operating power of the conventional generator set at time t, Indicates the maximum allowable operating power of a conventional generator set, ΔP MT Indicates the rated ramp rate of a conventional generator set.

[0108] Then, the power generation and consumption balance constraints of the power grid are established:

[0109] P t WT +P t PV +P t MT +P t WP,d -P t WP,c =P t L +P t SL

[0110] Among them, P t SL represents the irrigation load at time t, which can perform demand-side response to participate in peak load shaving and valley filling of the power grid. Its corresponding operation constraints can be expressed as:

[0111]

[0112]

[0113] Among them, P t SL represents the irrigation load at time t, E SL Indicates the total daily electricity consumption of irrigation load.

[0114] The irrigation load power-time curve in this embodiment is as follows Figure 2 shown.

[0115] 6. Establish an operation control model for the pumped storage irrigation system with the minimum daily operating cost of the system as the objective function.

[0116] The daily operating cost of the system only considers the fuel cost of conventional generator sets. The minimum daily operating cost of the system means the minimum operating cost of conventional generator sets. At present, a quadratic function is often used to fit the fuel consumption of conventional generator sets. The present invention uses a cubic polynomial to fit the operating cost characteristics of conventional generator sets, and the objective function of the pumped storage irrigation system operation control model is obtained as follows:

[0117]

[0118]

[0119] in, represents the operating cost of conventional generator sets at time t, P t MT represents the operating power of the conventional generator set at time t, and b3, b2, b1 and b0 are the power generation characteristic parameters of the conventional generator.

[0120] 7. Objective function and The solution is obtained to obtain the day-ahead operating power value of the conventional generator set, the day-ahead operating power value of the pumped-storage power station and the day-ahead operating power value of the pumped load when the daily operating cost of the pumped-storage irrigation system is the lowest.

[0121] First, define the function f(P t MT ) satisfies the following formula:

[0122] f(P t MT )=b3(P t MT ) 3 +b2(P t MT ) 2 +b1(P t MT )+b0

[0123] On this basis, according to the operating power range of conventional generator sets K+1 breakpoint powers are set at equal intervals, which satisfy the following relationship:

[0124]

[0125] For any power Pt MT , can be expressed by the superposition combination of breakpoint powers under different weights:

[0126]

[0127] in, represents the power weight corresponding to the breakpoint k, which satisfies the constraint

[0128] Mode It means that the actual operating power of conventional generator sets can only fall within a single power range. Indicates that the sum of the breakpoint power point weights is equal to 1, The linear combination is restricted to allow only adjacent fixed power points to participate.

[0129]

[0130]

[0131]

[0132]

[0133]

[0134]

[0135] Among them, Boolean variables Used to identify the specific operating power range of conventional generator sets.

[0136] Finally, the operating cost of a conventional generator set can be expressed as:

[0137]

[0138] Then, based on the MATALB platform coding, the optimization problem was characterized, and the yalmip software was used to call the commercial solver Gurobi to obtain the day-ahead operating power value of the conventional generator set, the day-ahead operating power value of the pumped-storage power station, and the day-ahead operating power value of the pumped load when the daily operating cost of the pumped-storage irrigation system was the lowest.

[0139] In this embodiment, through the above formula It can be solved that the minimum daily operating cost of the system is 821.76 million yuan.

[0140] 8. The day-ahead operating power value of conventional generators, the day-ahead operating power value of pumped-storage power stations and the day-ahead operating power value of pumped loads at which the daily operating cost of the pumped-storage irrigation system is minimized are used to control the operation of the pumped-storage irrigation system.

[0141] After adopting the above-mentioned operation control method, the operation power-time variation diagram of the pumped storage irrigation system is as follows: Figure 3 As shown in the figure, the sum of the conventional load power and the irrigation load power is the total output power of the pumped storage irrigation system. The total input power of the pumped storage irrigation system is the sum of the renewable energy power obtained by wind power and photovoltaic power and the power of the conventional generator set. Figure 3 It can be seen that conventional generators operate very little in a day, and the operating power source of the pumped-storage irrigation system mainly relies on renewable energy power obtained from wind power and photovoltaics with extremely low operating costs. The operation control method fully considers the multi-dimensional impact of wind and sunshine intensity meteorological factors on photovoltaic power generation, wind power, irrigation water consumption and conventional generators, and realizes the normal operation of the pumped-storage irrigation system under the premise of minimizing the daily operating cost of the system, significantly improving the economic efficiency of the pumped-storage irrigation system.

[0142] The preferred embodiments of the present invention are described in detail above in combination with the accompanying drawings and specific embodiments. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. An operation control method for a pumped storage irrigation system configured with wind power and photovoltaic power generation, characterized in that: The following steps are involved: Obtain the wind speed, sunshine intensity and conventional load power consumption of the power grid on the next day; The wind power generation and photovoltaic power generation are calculated based on the wind force and sunshine intensity; The irrigation water consumption and sunshine intensity data of the same season in the past are used to predict the irrigation water consumption of the next day: ① The data of irrigation water consumption and sunshine intensity of the same season in the past are retrieved, and the relevant curves are drawn on the two-dimensional coordinate system; ② Based on the MATLAB platform, polynomial fitting was used to fit the sunshine intensity-irrigation water consumption curve and determine the coefficient a i (i=1,2,...,5); ③ Based on the fitting curve of sunshine intensity-irrigation water consumption and the obtained sunshine intensity of the power grid on the second day, the irrigation water consumption on the second day is obtained as follows: Q t =a1G t +a2(G t ) 2 +a3(G t ) 3 +a4(G t ) 4 +a5(G t ) 5 , Among them, Q t is the irrigation water consumption at time t on the second day, G t is the sunshine intensity at time t on the next day; According to the operation characteristics of the pumped-storage irrigation system, the working model of the pumped-storage irrigation system, the operation model of the conventional generator set and the balance constraint of the power generation and power consumption of the power grid are established, and the operation control model of the pumped-storage irrigation system with the minimum daily operation cost of the system as the objective function is established; In the working model of the pumped storage irrigation system, the power constraint corresponding to the pumped storage operation mode of the pumped storage irrigation system is: The power constraint corresponding to the power generation operation mode of the pumped storage irrigation system is: The constraint that the pumped storage irrigation system can only operate in the pumped storage operation mode or the power generation operation mode at any time is: The ramp rate constraint of the pumped storage irrigation system is: -ΔP WP ≤P t WP,c -P t WP,d ≤ΔP WP ; The relationship between the reservoir water storage value of the pumped storage irrigation system and the working power of the pumped storage power station and the irrigation water consumption is: The reservoir capacity constraint of the pumped storage irrigation system is: Among them, P t WP,c and P t WP,d are the pumped storage power and power generation power of the pumped storage power station at time t, Indicates the rated working power of the pumped storage power station, Boolean variable and They represent the working mode of the pumped storage power station at time t, ΔP WP represents the ramp rate of the pumped storage power station, η c and η d They are the energy-water conversion and water-energy conversion efficiency of the pumped storage power station, and They represent the water storage, minimum water storage and maximum water storage value of the reservoir at time t respectively; Solve the operation control model of the pumped-storage irrigation system to obtain the day-ahead operating power value of the conventional generator set, the day-ahead operating power value of the pumped-storage power station, and the day-ahead operating power value of the pumped load; The operation of the pumped-storage irrigation system is controlled based on the obtained day-ahead operating power values ​​of conventional generator sets, the day-ahead operating power values ​​of pumped-storage power stations, and the day-ahead operating power values ​​of pumped loads.

2. The operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation according to claim 1, characterized in that: The wind force, sunshine intensity and conventional load power consumption of the power grid on the second day are expressed as set A: Among them, v1,v2,...,v t Indicates the wind speed at each time of the next day, G1, G2, ..., G t Indicates the sunshine intensity at each time of the next day. Indicates the normal load power consumption at various times of the next day.

3. The operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation according to claim 2, characterized in that: The wind power generation power and photovoltaic power generation power are: P t PV =P STC G t [1+ε(T c,t -T r )] / G STC ; Among them, P t WT is the wind power generation power at time t; v t is the wind speed at time t; r and Respectively represent the cut-in wind speed, rated wind speed and cut-out wind speed; P t PV is the photovoltaic power generation power at time t; P STC G is the maximum test power output per unit photovoltaic installed capacity under standard test conditions; STC is the sunshine intensity under standard test conditions; ε is the power temperature coefficient; T c,t is the operating temperature of the solar panel at time t; T r is the reference temperature.

4. The operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation according to claim 3 is characterized in that: In the conventional generator set operation model, the working range is: The ramp rate constraint of conventional generator sets is: Among them, P t MT Indicates the operating power of the conventional generator set at time t, Indicates the maximum allowable operating power of a conventional generator set, ΔP MT Indicates the rated ramp rate of a conventional generator set; The balance constraint of power generation and power consumption of the power grid is: P t WT +P t PV +P t MT +P t WP,d -P t WP,c =P t L +P t SL , Among them, P t SL represents the irrigation load at time t, Indicates the rated operating power of the irrigation load. E SL Indicates the total daily electricity consumption of irrigation load.

5. The operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation according to claim 4, characterized in that: The objective function of the pumped storage irrigation system operation control model is: in, represents the operating cost of the conventional generator set at time t, and b3, b2, b1 and b0 are the power generation characteristic parameters of the conventional generator.

6. The operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation according to claim 5, characterized in that: The solution method of the pumped storage irrigation system operation control model is: ①Define the function f(P t MT ) satisfies the following formula: f(P t MT )=b3(P t MT ) 3 +b2(P t MT ) 2 +b1(P t MT )+b0, Among them, P t MT Indicates the operating power of the conventional generator set at time t; ②According to the operating power range of conventional generator sets K+1 breakpoint powers are set at equal intervals, which satisfy the following relationship: ③For any power P t MT , can be expressed by the superposition combination of breakpoint powers under different weights: in, represents the power weight corresponding to the breakpoint k; ④The operating cost of a conventional generator set can be expressed as: Then, the optimization problem is characterized by coding based on the MATALB platform, and the commercial solver Gurobi is called by yalmip software to obtain the day-ahead operating power values ​​of conventional generators, pumped storage power stations and pumped loads when the system daily operating cost is the lowest.

7. The operation control method of a pumped storage irrigation system configured with wind power and photovoltaic power generation according to claim 6, characterized in that: The power weight corresponding to the breakpoint k The following constraints are met: ① The actual operating power of conventional generator sets can only fall within a single power range: ②The sum of the breakpoint power point weights is equal to 1: ③Only adjacent fixed power points are allowed to participate in linear combination: Among them, Boolean variables Used to identify the specific operating power range of conventional generator sets.

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