Simulation operation regulation and control method, device, equipment, medium and program of integrated power station

Abstract

The invention provides a simulation operation regulation and control method, device, equipment, medium and program for an integrated power station, and the method comprises the steps: determining hourly heat collection amount data of a photo-thermal power station according to an area where the photo-thermal power station is located and a target light condensation and heat collection area of the photo-thermal power station; acquiring preset wind power generation power of a wind power station and photovoltaic power generation power of a photovoltaic power station; according to the hourly heat collection capacity data, the wind power generation power and the photovoltaic power generation power, heat transfer and thermoelectric conversion between the steam-water circulation system and the heat storage system are simulated, and a steam-water circulation efficiency-photo-thermal power station load relation mapping graph is obtained; and determining a simulation operation strategy of the integrated power station, and performing simulation operation regulation and control on the integrated power station according to the simulation operation strategy and the steam-water circulation efficiency-photo-thermal power station load relation mapping graph. Simulation scheduling of the integrated power station can be realized, and the scheduling accuracy is high.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of energy system control technology, and in particular to a method, device, equipment, medium and program for simulation operation and control of integrated power plants. Background Technology

[0002] Simulation-based operation and control is a systematic process involving multiple steps such as model building, simulation execution, result analysis, and optimization control. Through simulation-based operation and control, the efficiency of verifying energy system operation strategies can be effectively improved, verification costs and risks can be reduced, and the operational efficiency of energy systems can be enhanced.

[0003] Concentrated solar power (CSP) is the most similar to traditional power sources among all new energy power generation technologies. It uses solar energy to replace coal-fired power at the front end and traditional steam turbine generators at the back end. To gradually achieve true replacement of coal-fired power, we propose the concept of a supply-guaranteed CSP integrated power plant (hereinafter referred to as the integrated power plant). This plant adopts a "CSP + wind + solar + thermal storage + supplementary combustion" technical route, comprehensively considering factors such as CSP performance, new energy output characteristics, thermal storage and exchange technology, and power system security. It integrates fluctuating new energy sources into a green power source with reliable capacity support and supply guarantee functions, serving as a near-term solution for replacing fossil fuels with new energy sources.

[0004] The energy conversion process of integrated power plants is complex, and existing simulation operation and control methods are difficult to implement for the simulation operation and control of integrated power plants. Summary of the Invention

[0005] This invention provides a method, apparatus, equipment, medium, and program for the simulation operation and control of integrated power plants, in order to solve the problem that existing simulation operation and control methods are difficult to implement for the simulation operation and control of integrated power plants.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a simulation operation and control method for an integrated power plant, the integrated power plant including: a solar thermal power plant, a wind power plant, a photovoltaic power plant, a steam-water circulation system, and a thermal storage system;

[0008] The simulation operation control method includes:

[0009] The hourly heat collection data of the solar thermal power plant is determined based on the location of the solar thermal power plant and the target concentrating heat collection area of ​​the solar thermal power plant.

[0010] Obtain the preset wind power generation power of the wind power station and the photovoltaic power generation power of the photovoltaic power station; based on the hourly heat collection data, the wind power generation power and the photovoltaic power generation power, simulate the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system to obtain a steam-water circulation efficiency-solar thermal power station load relationship mapping diagram.

[0011] The simulation operation strategy of the integrated power plant is determined, and the simulation operation control of the integrated power plant is carried out according to the simulation operation strategy and the mapping diagram of steam-water cycle efficiency-solar thermal power plant load relationship.

[0012] Optionally, the objective function of the simulation operation control is determined by the renewable energy curtailment rate of the integrated power station and the supplementary combustion rate of the integrated power station.

[0013] Optionally, the integrated power station further includes: a supplementary combustion system;

[0014] The expression for the objective function is as follows:

[0015]

[0016] Where, η b η represents the renewable energy curtailment rate of the integrated power station; n P represents the afterburning rate of the integrated power plant. b(i) For time i, the amount of wind and solar power curtailment; Q b(i) Let η be the amount of heat wasted by the solar thermal power plant at time i; CT0 P represents the average system efficiency of the steam-water circulation system. w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let Q be the power generation capacity of the photovoltaic power station at time i; CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; n(i) η is the heat flowing from the afterburning system to the steam-water circulation system at time i; CT(i) Let P be the system efficiency of the steam-water circulation system at time i; 0(i) Let be the power supply load that the integrated power station needs to meet at time i; ε is the preset threshold for the new energy curtailment rate. This is the preset afterburning rate threshold.

[0017] Optionally, the value of the renewable energy curtailment rate threshold ε includes: ε = 0.1; and / or

[0018] The afterburning rate threshold The possible values ​​include:

[0019] Optionally, the integrated power plant is subjected to simulation operation control based on the simulation operation strategy and the steam-water cycle efficiency-solar thermal power plant load relationship mapping diagram, including:

[0020] Determine the power output that the solar thermal power plant needs to provide at the current moment;

[0021] Based on the output required by the solar thermal power plant and the mapping diagram of the relationship between the steam-water circulation efficiency and the solar thermal power plant load, the heat flowing from the thermal storage system to the steam-water circulation system is determined.

[0022] Determine the amount of heat wasted by the solar thermal power plant;

[0023] Based on the heat flowing from the thermal storage system to the steam-water circulation system and the discarded heat, the predicted heat storage capacity of the thermal storage system is determined, and the integrated power station is simulated and controlled based on the predicted heat storage capacity.

[0024] Optionally, the simulation operation strategy includes: a first simulation operation strategy;

[0025] Under the first simulation operation strategy, the expression for determining the output power that the solar thermal power plant needs to provide at the current moment is as follows:

[0026] P cT(i) =max(P 0(i) -P w(i) -P pv(i) ,0);

[0027] Under the first simulation operation strategy, the expression for the heat waste of the solar thermal power plant is determined as follows:

[0028] P b(i) =max(P w(i) +P pv(i) -P 0(i) -min(E CT (QC) cT -ES CT(i-1) ) / η E ), 0);

[0029] Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) -max(P w(i) +P pv(i) -P 0(i) -P b(i) ,0)),0);

[0030] Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i; b(i)For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let E be the power generation capacity of the photovoltaic power station at time i; CT The power of the molten salt heater in the solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in the solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) The heat flowing from the thermal storage system to the steam-water circulation system at time i.

[0031] Optionally, the simulation operation strategy includes: a second simulation operation strategy;

[0032] Under the second simulation operation strategy, the expression for determining the output power that the solar thermal power plant needs to provide at the current moment is as follows:

[0033] P cT(i) =max(P 0(i) -P w(i) -P pv(i) C cT *δ cT );

[0034] Under the second simulation operation strategy, the expression for the heat waste of the solar thermal power plant is determined as follows:

[0035] P b(i) =max(P w(i) +P pv(i) -(P 0(i) -C cT *δ cT )-min(E CT (QC) cT -ES CT(i-1) ) / η E ), 0);

[0036] Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) )-max((P w(i) +P pv(i) -P 0(i) +C cT *δcT -P b(i) )*η E ,0),0);

[0037] Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i; b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let C be the power generation capacity of the photovoltaic power station at time i; cT δ represents the installed capacity of the solar thermal power plant; cT E represents the minimum load required for the sustainable operation of the steam turbine in the solar thermal power plant under the current operating strategy. CT The power of the molten salt heater in the solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in the solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) The heat flowing from the thermal storage system to the steam-water circulation system at time i.

[0038] Secondly, embodiments of the present invention provide a simulation operation control device for an integrated power plant, the integrated power plant including: a solar thermal power plant, a wind power plant, a photovoltaic power plant, a steam-water circulation system, and a thermal storage system;

[0039] The simulation operation control device includes:

[0040] The execution module is used to determine the hourly heat collection data of the solar thermal power plant based on the location of the solar thermal power plant and the target concentrating heat collection area of ​​the solar thermal power plant.

[0041] The simulation module is used to obtain the preset wind power generation power of the wind power station and the photovoltaic power generation power of the photovoltaic power station; based on the hourly heat collection data, the wind power generation power and the photovoltaic power generation power, the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system are simulated to obtain a mapping diagram of the steam-water circulation efficiency-solar thermal power station load relationship.

[0042] The scheduling module is used to determine the simulation operation strategy of the integrated power plant, and to perform simulation operation control of the integrated power plant according to the simulation operation strategy and the mapping diagram of the steam-water cycle efficiency-solar thermal power plant load relationship.

[0043] Thirdly, embodiments of the present invention provide an electronic device, including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein when the program or instructions are executed by the processor, they implement the steps in the simulation operation control method for an integrated power plant as described in any one of the first aspects.

[0044] Fourthly, embodiments of the present invention provide a readable storage medium storing a program or instructions, which, when executed by a processor, implement the steps in the simulation operation and control method for an integrated power plant as described in any one of the first aspects.

[0045] Fifthly, embodiments of the present invention provide a computer program product, including computer instructions, which, when executed by a processor, implement the steps of the integrated power plant simulation operation control method as described in any one of the first aspects.

[0046] In this embodiment of the invention, the hourly heat collection data of the solar thermal power plant is determined based on the location of the plant and its target concentrating area. Pre-set wind power generation and photovoltaic power generation of the wind power plant and photovoltaic power plant are obtained. Based on the hourly heat collection data, wind power generation, and photovoltaic power generation, the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system are simulated to obtain a steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram. A simulation operation strategy for the integrated power plant is determined, and the integrated power plant is simulated and regulated based on the simulation operation strategy and the steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram. This embodiment of the invention constructs an accurate mathematical description of the efficiency of the solar thermal steam-water circulation system with the load of the solar thermal power plant, i.e., the steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram, to achieve simulation scheduling of the integrated power plant. The simulation scheduling has a high degree of consistency with the actual operating characteristics of the integrated power plant and high scheduling accuracy. Attached Figure Description

[0047] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0048] Figure 1 This is a schematic diagram of the integrated power plant architecture;

[0049] Figure 2 This is a flowchart illustrating the simulation operation and control method for an integrated power plant according to an embodiment of the present invention.

[0050] Figure 3Example of a steam-water cycle efficiency-solar thermal power plant load relationship mapping diagram;

[0051] Figure 4 This is a schematic diagram of the typical daily load curve shape in a grid-connected area;

[0052] Figure 5a This is a simulation diagram of the production sequence of a typical week in summer for an integrated power plant.

[0053] Figure 5b This is a simulation diagram of the typical weekly production sequence of an integrated power plant during winter.

[0054] Figure 6 This is a schematic diagram of the integrated power plant simulation operation control device according to an embodiment of the present invention;

[0055] Figure 7 This is a schematic block diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, "A or B" covers three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0058] In the technical solutions disclosed herein, terms such as “connection,” “coupling,” or “linking” are not limited to physical or mechanical connections, but may include electrical connections.

[0059] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0060] In recent years, my country's installed capacity of new energy sources has grown rapidly. By the end of 2023, the cumulative installed capacity of wind power and solar power reached approximately 440 million kilowatts and 610 million kilowatts, respectively, with annual new installed capacity exceeding 290 million kilowatts. The rapid development and efficient consumption of new energy sources have provided important support for promoting the green and low-carbon transformation of energy and ensuring the achievement of the "dual carbon" goals. However, the capacity support capability of wind and solar power is relatively low, and compared with traditional energy sources, it has not formed a reliable alternative. The "dual high" power system exhibits obvious characteristics of low inertia, low damping, and weak voltage support, posing significant risks to the safe and stable operation of the power system.

[0061] Concentrated solar power (CSP) is the most similar to traditional power sources among all new energy power generation technologies. It uses solar energy to replace coal-fired power at the front end and traditional steam turbine generators at the back end. To gradually achieve true replacement of coal-fired power, we propose the concept of a supply-guaranteed CSP integrated power plant (hereinafter referred to as the integrated power plant). This plant adopts a "CSP + wind + solar + thermal storage + supplementary combustion" technical route, comprehensively considering factors such as CSP performance, new energy output characteristics, thermal storage and exchange technology, and power system security. It integrates fluctuating new energy sources into a green power source with reliable capacity support and supply guarantee functions, serving as a near-term solution for replacing fossil fuels with new energy sources.

[0062] The technological process of a power plant that substantially integrates solar thermal power generation and wind and solar photovoltaic power generation for supply guarantee purposes involves adding an electric molten salt heating system and a natural gas molten salt heating system to the existing systems of the solar thermal power plant and the wind and solar photovoltaic power plant. (See [link to relevant documentation]). Figure 1 As shown, the excess electricity generated by wind and solar power beyond the required power supply load is stored in a high-temperature storage tank by heating molten salt in a cryogenic tank through an electric molten salt heating system. When resource conditions are unfavorable and wind and solar power output cannot meet the required power supply load, the solar thermal energy storage system releases heat to generate high-temperature, high-pressure steam through a steam generation system. This steam then enters the turbine system to generate electricity, completing the spatial and temporal transfer of wind and solar power and achieving daily regulation of electricity. Furthermore, a natural gas molten salt heating system ensures the continuous and stable output of the integrated power plant. Therefore, there may be significant power exchange between the wind and solar power systems and the solar thermal system within the power plant, fully utilizing the low-cost advantages of wind and solar power and the large-capacity, high-reliability thermal storage advantages of solar thermal power, while ensuring a high overall utilization rate of new energy sources.

[0063] Currently, integrated solar thermal and wind / photovoltaic power plants in China are primarily developed using an economically complementary model. The solar thermal, wind, and photovoltaic systems are connected to the grid separately, with virtually no flow of electricity or heat between them. The aim is to subsidize the higher cost of solar thermal power generation through the lower cost of wind and photovoltaic power generation. In these integrated plants, wind and photovoltaic power are directly connected to the grid according to dispatch requirements, while solar thermal power generation is typically concentrated during peak evening hours using a peak-shaving model. When simulating the power generation of the integrated plant, solar thermal, wind, and photovoltaic power are calculated using their respective power generation prediction software, and the power output is then superimposed to obtain the overall power generation curve for the plant. This curve generally cannot meet the load curve of the grid-connected area.

[0064] Integrated power plants involve the coupling and conversion of heat and electricity between different types of power sources. The overall system is complex and the operating conditions are varied. The design of the power plant scheme is affected and constrained by multiple factors such as resource conditions, power system characteristics and the solar thermal system itself. Therefore, it is necessary to carry out simulation research to study and demonstrate the ability of new solar thermal power plants to provide power in real time according to the load curve and the self-support and self-regulation capabilities of the power plant without relying on system support and regulation resources.

[0065] However, the energy conversion process of integrated power plants is complex, and existing simulation operation and control methods are difficult to implement simulation operation and control for integrated power plants.

[0066] This invention provides a simulation operation and control method for an integrated power plant, which includes: a solar thermal power plant, a wind power plant, a photovoltaic power plant, a steam-water circulation system, and a thermal storage system;

[0067] See Figure 2 As shown, Figure 2 This is a flowchart illustrating the simulation operation and control method for an integrated power plant according to an embodiment of the present invention. The simulation operation and control method includes:

[0068] Step 11: Determine the hourly heat collection data of the solar thermal power plant based on the location of the plant and its target concentrating area.

[0069] Step 12: Obtain the preset wind power generation of the wind power station and the photovoltaic power generation of the photovoltaic power station; based on the hourly heat collection data, wind power generation and photovoltaic power generation, simulate the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system to obtain the steam-water circulation efficiency-solar thermal power station load relationship mapping diagram.

[0070] Step 13: Determine the simulation operation strategy of the integrated power plant, and perform simulation operation control of the integrated power plant based on the simulation operation strategy and the mapping diagram of steam-water cycle efficiency-solar thermal power plant load relationship.

[0071] It should be noted that the solar resource information of the region where the solar thermal power plant is located can be determined based on the location of the plant. Combined with the target concentrating solar collector area of ​​the plant, hourly heat collection data can be accurately obtained through simulation calculations. In practical applications, the location of the solar thermal power plant and the target concentrating solar collector area can be used as input parameters. The SAM (System Advisor Model) software can be used to optimize the concentrating solar collector layout of the plant, obtaining the specific site's solar resource and concentrating solar collector area (S... CT Under these conditions, the hourly heat collection capacity (Q) of the concentrating solar collector system in a solar thermal power plant. CT ) data (i.e., hourly heat collection data).

[0072] SAM (System Advisor Model) is a free software developed by the National Renewable Energy Laboratory (NREL) in the United States that can simulate the performance and economics of solar thermal power generation systems.

[0073] In this embodiment of the invention, the hourly heat collection data of the solar thermal power plant is determined based on the actual layout area of ​​the solar thermal power plant and the target concentrating heat collection area, and the hourly heat collection data of the solar thermal power plant has high accuracy.

[0074] In step 12 of this embodiment of the invention, hourly heat collection data, wind power generation, and photovoltaic power generation can be used as input data. Thermoflow software is used to model the solar thermal power plant and perform heat balance calculations to obtain the heat balance results of the solar thermal power plant's thermal system under different loads (mainly including rated load conditions, partial load conditions, and thermal storage output conditions). Based on the heat balance results, Thermoflow software can be further used to accurately simulate the heat transfer and thermoelectric conversion processes between the thermal storage system and the steam-water circulation system to obtain the results of the concentrating solar collector system and thermal storage system (e.g., under different operating conditions of the solar thermal power plant). Figure 1 Molten salt thermal storage system) and steam-water circulation system (e.g.: Figure 1 The relevant thermodynamic parameters of the heat transfer medium at the inlet and outlet of the steam-water circulation system (comprising the turbine unit, feedwater system, and salt-water heat exchange system) are as follows: temperature, pressure, enthalpy, etc. Based on the obtained thermodynamic parameters and the first law of thermodynamics, η... CT = Turbine output / (Heat transfer fluid flow rate * Inlet and outlet enthalpy difference) to obtain the efficiency η of the solar thermal steam-water circulation system in the solar thermal power plant model. CT With the load of the solar thermal power plant (i.e., P) cT / C cT Among them, P cT For the power generation of a solar thermal power plant, C cT For the installed capacity of a solar thermal power plant, P cT Divide by CcT That is, to obtain an accurate mathematical description of the load change of the solar thermal power plant (equivalent to the steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram in the embodiment of the present invention).

[0075] The following explanation uses a specific example, taking a 100MW solar thermal power plant as an example. The corresponding steam-water cycle efficiency versus solar thermal power plant load mapping diagram can be found below. Figure 3 As shown. It should be noted that the characteristics of the steam-water cycle efficiency-solar power plant load relationship mapping diagrams are different for different levels of solar thermal power plants, and cannot be exhaustively listed here. However, the inability to exhaustively list them should not be considered as a lack of understanding.

[0076] In some embodiments of the present invention, the simulation operation strategy of the integrated power plant may optionally include: a first simulation operation strategy and a second simulation operation strategy.

[0077] Under the first simulation operation strategy, wind power plants and photovoltaic power plants are given priority in generating electricity, and the remaining power gap is supplemented by the output of solar thermal power plants. The electricity generated by wind power plants and photovoltaic power plants enters the solar thermal storage system (e.g.: Figure 1 (Molten salt thermal energy storage system) When the storage tank of the solar thermal energy storage system is full or the amount of new energy power entering the thermal energy storage system exceeds the power of the electric molten salt heater of the solar thermal power plant, wind and solar power will be curtailed.

[0078] Under the second simulation operation strategy, the concentrated solar power (CSP) plant prioritizes power generation at the lowest load, and excess heat generated by the concentrating solar collectors is stored in the thermal storage system. The power shortfall caused by the CSP plant prioritizing lowest load generation is supplemented by wind and solar power plants. Excess electricity generated by wind and solar power plants enters the CSP thermal storage system. When the storage tanks of the CSP thermal storage system are full, or when the amount of renewable energy entering the storage system exceeds the power of the CSP plant's molten salt heaters, wind and solar power curtailment occurs.

[0079] In this embodiment of the invention, the hourly heat collection data of the solar thermal power plant is determined based on the location of the plant and its target concentrating area. Pre-set wind power generation and photovoltaic power generation of the wind power plant and photovoltaic power plant are obtained. Based on the hourly heat collection data, wind power generation, and photovoltaic power generation, the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system are simulated to obtain a steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram. A simulation operation strategy for the integrated power plant is determined, and the integrated power plant is simulated and regulated based on the simulation operation strategy and the steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram. This embodiment of the invention constructs an accurate mathematical description of the efficiency of the solar thermal steam-water circulation system with the load of the solar thermal power plant, i.e., the steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram, to achieve simulation scheduling of the integrated power plant. The simulation scheduling has a high degree of consistency with the actual operating characteristics of the integrated power plant and high scheduling accuracy.

[0080] In some embodiments of the present invention, optionally, the objective function for simulation operation control is determined by the renewable energy curtailment rate of the integrated power station and the supplementary combustion rate of the integrated power station.

[0081] Supplemental combustion refers to the process by which an integrated power plant supplements its power supply by generating electricity from natural gas when the generated electricity is insufficient to meet the required power load. The supplemental combustion rate of an integrated power plant is the proportion of electricity generated by natural gas to the required power load within a certain period.

[0082] Thermoflow is a software application used for thermodynamic and fluid dynamic analysis, widely applied in fields such as energy engineering, combined heat and power, refrigeration, and air conditioning. It helps engineers and researchers simulate and optimize the performance of thermal systems, including steam turbines, gas turbines, and heat exchangers.

[0083] In this embodiment of the invention, the objective function of simulation operation regulation is determined by the new energy curtailment rate and the supplementary combustion rate of the integrated power station, which is conducive to optimizing energy allocation and improving energy utilization.

[0084] In some embodiments of the present invention, the integrated power station may optionally further include: a combustion supplementation system;

[0085] The objective function is expressed as follows:

[0086]

[0087] Where, η b The curtailment rate of renewable energy in integrated power plants; η n The supplementary combustion rate of the integrated power plant; P b(i) For time i, the amount of wind and solar power curtailment; Q b(i) Let η be the amount of heat wasted by the solar thermal power plant at time i; CT0 P represents the average system efficiency of the steam-water circulation system. w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let Q be the power generation of the photovoltaic power station at time i; CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; n(i) η represents the heat flowing from the combustion system to the steam-water circulation system at time i; CT(i) Let P be the system efficiency of the soda-water circulation system at time i; 0(i) Let ε be the power supply load that the integrated power station needs to meet at time i; ε is the preset threshold for the curtailment rate of new energy sources. This is the preset afterburning rate threshold.

[0088] In this embodiment of the invention, the supplementary combustion system is a system that supplements the power shortage by generating electricity from natural gas.

[0089] The objective function constraint simulation operation control of the present invention is beneficial to optimize energy allocation and improve energy utilization during simulation operation control.

[0090] In some embodiments of the present invention, optionally, the value of the renewable energy curtailment rate threshold ε includes: ε = 0.1; and / or

[0091] Afterburning rate threshold The possible values ​​include:

[0092] It should be noted that when ε = 0.1, the objective function represents that the simulation operation regulation should ensure that the utilization rate of new energy is at least 90%. In this case, the objective function characterizes the simulation operation regulation so that the integrated power station meets at least 95% of the power supply load required by the integrated power station.

[0093] In this embodiment of the invention, based on the above-mentioned renewable energy curtailment rate threshold ε and / or supplementary combustion rate threshold... The objective function set by the indicators can ensure that the simulation operation and control achieves optimized energy allocation and improved energy utilization.

[0094] In some embodiments of the present invention, optionally, the integrated power plant is subjected to simulation operation control based on the simulation operation strategy and the steam-water cycle efficiency-solar thermal power plant load relationship mapping diagram, including:

[0095] Step a: Determine the power output that the solar thermal power plant needs to provide at the current moment;

[0096] Step b: Based on the output required by the solar thermal power plant and the mapping diagram of steam-water circulation efficiency - solar thermal power plant load, determine the heat flowing from the thermal storage system to the steam-water circulation system.

[0097] Step c: Determine the amount of heat wasted by the solar thermal power plant;

[0098] Step d: Determine the predicted heat storage capacity of the thermal storage system based on the heat flowing from the thermal storage system to the steam-water circulation system and the heat discarded, and perform simulation operation control of the integrated power station based on the predicted heat storage capacity.

[0099] In this embodiment of the invention, based on the output required by the solar thermal power plant and the mapping diagram of the steam-water circulation efficiency versus the solar thermal power plant load, the expression for the heat flowing from the thermal storage system to the steam-water circulation system is determined as follows:

[0100] Q g(i) =P cT(i) / η CT(i)

[0101] Among them, Q g(i) P represents the heat flowing from the thermal storage system to the steam-water circulation system at time i; cT(i)Let η be the power output of the solar thermal power plant at time i (i.e., the output power that the solar thermal power plant needs to provide in this embodiment of the invention); CT(i) The efficiency of the i-type solar thermal steam-water circulation system is determined by the mapping diagram of steam-water circulation efficiency versus solar thermal power plant load.

[0102] In this embodiment of the invention, based on the heat flowing from the thermal storage system to the steam-water circulation system and the heat lost, the expression for determining the predicted heat storage capacity of the thermal storage system is as follows:

[0103] ES CT(i+1) =min(ES) CT(i) +Q CT(i) -Q g(i) -Q b(i) +min(E CT (QC) cT

[0104] -ES CT(i-1) ) / η E )*η E QC cT )

[0105] Among them, ES CT(i+1) The thermal storage level of the thermal storage system at the next moment is equivalent to the predicted thermal storage capacity of the thermal storage system in this embodiment of the invention; ES CT(i) Let Q be the thermal storage level of the thermal storage system at time i; CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) Q represents the amount of heat flowing from the thermal storage system to the steam-water circulation system at time i; b(i) E represents the power output required by the solar thermal power plant at time i. CT The power of the molten salt heater in a solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) The historical thermal storage level of the thermal storage system at the previous moment; η E The efficiency of the electric molten salt heater in a solar thermal power plant.

[0106] It should be noted that under each simulation operation strategy, the above-mentioned expression for the heat flowing from the thermal storage system to the steam-water circulation system is used, as is the above-mentioned expression for determining the predicted heat storage of the thermal storage system.

[0107] In some embodiments of the present invention, the simulation operation strategy may optionally include: a first simulation operation strategy;

[0108] Under the first simulation operation strategy, the expression for determining the output that the solar thermal power plant needs to provide at the current moment is as follows:

[0109] P cT(i) =max(P 0(i) -P w(i)-P pv(i) ,0);

[0110] Under the first simulation operation strategy, the expression for determining the heat waste of the concentrated solar power plant is as follows:

[0111] P b(i) =max(P w(i) +P pv(i) -P 0(i) -min(E CT (QC) cT -ES CT(i-1) ) / η E ), 0);

[0112] Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) -max(P w(i) +P pv(i) -P 0(i) -P b(i) ,0)),0);

[0113] Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i. b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let E be the power generation capacity of the photovoltaic power station at time i; CT The power of the molten salt heater in a solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in a solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) Let be the heat flowing from the thermal storage system to the steam-water circulation system at time i.

[0114] The embodiments of the present invention implement the first simulation operation strategy through the above expression. Under the first simulation operation strategy, wind power plants and photovoltaic power plants generate electricity first, and the remaining power gap is supplemented by the output of solar thermal power plants. The electricity generated by wind power plants and photovoltaic power plants enters the solar thermal storage system. When the storage tank of the solar thermal storage system is full or the amount of new energy electricity entering the storage system exceeds the power of the electric molten salt heater of the solar thermal power plant, wind and solar curtailment occurs.

[0115] In some embodiments of the present invention, the simulation operation strategy may optionally include: a second simulation operation strategy;

[0116] Under the second simulation operation strategy, the expression for determining the output that the solar thermal power plant needs to provide at the current moment is as follows:

[0117] P cT(i) =max(P 0(i) -P w(i) -P pv(i) C cT *δ cT );

[0118] Under the second simulation operation strategy, the expression for determining the heat waste of the solar thermal power plant is as follows:

[0119] P b(i) =max(P w(i) +P pv(i) -(P 0(i) -C cT *δ cT )-min(E CT (QC) cT -ES CT(i-1) ) / η E ), 0);

[0120] Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) )-max((P w(i) +P pv(i) -P 0(i) +C cT *δ cT -P b(i) )*η E ,0),0);

[0121] Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i. b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let C be the power generation capacity of the photovoltaic power station at time i; cT For the installed capacity of a solar thermal power plant; δ cT E represents the minimum load required for the sustainable operation of the steam turbine in a solar thermal power plant under the current operating strategy. CT The power of the molten salt heater in a solar thermal power plant; QC cTThe total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in a solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) Let be the heat flowing from the thermal storage system to the steam-water circulation system at time i.

[0122] This invention implements a second simulation operation strategy through the above expression. Under the second simulation operation strategy, the solar thermal power plant prioritizes power generation at the lowest load, and the excess heat generated by the concentrating solar collector system in the solar thermal power plant is stored in the thermal storage system. The power shortage caused by the solar thermal power plant prioritizing power generation at the lowest load is supplemented by wind power plants and photovoltaic power plants. The excess electricity generated by wind power plants and photovoltaic power plants enters the solar thermal storage system. When the storage tank of the solar thermal storage system is full or the amount of new energy electricity entering the storage system exceeds the power of the electric molten salt heater of the solar thermal power plant, wind and solar power curtailment occurs.

[0123] The following examples illustrate this:

[0124] The typical daily load curve of the Gansu power grid is used as the load curve that the integrated solar thermal and wind / photovoltaic power station (i.e., the integrated power station in this embodiment of the invention) needs to follow in real time. The integrated power station is designed to have self-supporting and self-regulating capabilities. The overall output of solar thermal and wind / photovoltaic power generation can follow the load curve of the grid-connected area in real time throughout the year without occupying the system's regulation resources. The typical daily load curve of the grid-connected area is as follows: Figure 4 As shown.

[0125] The wind and solar resource conditions are based on the actual output characteristic curves and annual utilization hours of existing projects in the Yumen area, with an annual utilization of 1750 hours for photovoltaic resources and 2700 hours for wind resources, representing an annual normal direct radiation of 1853 kWh / m². 2 .

[0126] Taking a novel solar thermal power plant with 1,000,000 kW of solar thermal power, 1,500,000 kW of photovoltaic power, and 1,500,000 kW of wind power, a mirror field scale of 1,500 hours, a thermal storage duration of 12 hours, and an 850,000 kW configuration of electric molten salt heaters as an example, when using the first joint operation strategy (i.e., the first simulation operation strategy in this embodiment of the invention), its typical weekly time-series simulation results in summer and winter are as follows: Figure 5a and 5b As shown in the figure, when following the load curve, new energy sources are given priority in power output, and the gap is supplemented by solar thermal power output. When wind and solar resources are poor and there is no available thermal storage, power is generated by natural gas combustion. The proportion of combustion power in the total power generation does not exceed 15%, and the utilization rate of new energy sources is greater than 90%.

[0127] Simulation results show that the new type of concentrated solar power (CSP) plant (i.e., integrated power plant) can effectively follow the real-time load curve of the grid-connected area, providing power supply support to the grid similar to that of thermal power units. The integrated power plant can provide electricity according to local power demand without relying on system support and regulation resources, possessing voltage and frequency support functions. Its equivalent load can replace a 1 million kW thermal power unit. The power plant generates 7.685 billion kWh of electricity annually, with renewable energy accounting for 88.60%. Annual natural gas consumption is 254 million standard cubic meters, and the renewable energy curtailment rate is 8.99%. Based on the coal consumption of 290 g / kWh for ultra-supercritical coal-fired units, it saves approximately 2.2 million tons of standard coal annually and reduces carbon dioxide emissions by approximately 5.6 million tons annually. The new CSP plant combines the advantages of both power supply support and environmental protection with low carbon emissions.

[0128] This invention provides a simulation operation control device for an integrated power plant, the integrated power plant including: a solar thermal power plant, a wind power plant, a photovoltaic power plant, a steam-water circulation system, and a thermal storage system;

[0129] See Figure 6 As shown, Figure 6 This is a schematic diagram of the integrated power plant simulation operation control device according to an embodiment of the present invention. The simulation operation control device 60 includes:

[0130] The execution module 61 is used to determine the hourly heat collection data of the solar thermal power plant based on the location of the solar thermal power plant and the target concentrating heat collection area of ​​the solar thermal power plant.

[0131] The simulation module 62 is used to obtain the preset wind power generation power of the wind power station and the photovoltaic power generation power of the photovoltaic power station; based on the hourly heat collection data, the wind power generation power and the photovoltaic power generation power, the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system are simulated to obtain a steam-water circulation efficiency-solar thermal power station load relationship mapping diagram.

[0132] The scheduling module 63 is used to determine the simulation operation strategy of the integrated power plant, and to perform simulation operation control of the integrated power plant according to the simulation operation strategy and the mapping diagram of the steam-water cycle efficiency-solar thermal power plant load relationship.

[0133] In some embodiments of the present invention, optionally, the objective function of the simulation operation regulation is determined by the renewable energy curtailment rate of the integrated power station and the supplementary combustion rate of the integrated power station.

[0134] In some embodiments of the present invention, the integrated power station may optionally further include: a combustion supplementation system;

[0135] The expression for the objective function is as follows:

[0136]

[0137] Where, η b η represents the renewable energy curtailment rate of the integrated power station; n P represents the afterburning rate of the integrated power plant. b(i) For time i, the amount of wind and solar power curtailment; Q b(i) Let η be the amount of heat wasted by the solar thermal power plant at time i; CT0 P represents the average system efficiency of the steam-water circulation system. w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let Q be the power generation capacity of the photovoltaic power station at time i; CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; n(i) η is the heat flowing from the afterburning system to the steam-water circulation system at time i; CT(i) Let P be the system efficiency of the steam-water circulation system at time i; 0(i) Let be the power supply load that the integrated power station needs to meet at time i; ε is the preset threshold for the new energy curtailment rate. This is the preset afterburning rate threshold.

[0138] In some embodiments of the present invention, optionally, the value of the renewable energy curtailment rate threshold ε includes: ε = 0.1; and / or

[0139] The afterburning rate threshold The possible values ​​include:

[0140] In some embodiments of the present invention, optionally,

[0141] The scheduling module 63 is also used to determine the output that the solar thermal power plant needs to provide at the current moment;

[0142] The scheduling module 63 is also used to determine the heat flowing from the thermal storage system to the steam-water circulation system based on the output required by the solar thermal power plant and the steam-water circulation efficiency-solar thermal power plant load relationship mapping diagram.

[0143] The scheduling module 63 is also used to determine the heat waste of the solar thermal power plant;

[0144] The scheduling module 63 is also used to determine the predicted heat storage capacity of the thermal storage system based on the heat flowing from the thermal storage system to the steam-water circulation system and the discarded heat, and to perform simulation operation control of the integrated power station based on the predicted heat storage capacity.

[0145] In some embodiments of the present invention, the simulation operation strategy may optionally include: a first simulation operation strategy;

[0146] Under the first simulation operation strategy, the expression for determining the output power that the solar thermal power plant needs to provide at the current moment is as follows:

[0147] P cT(i) =max(P 0(i) -P w(i) -P pv(i) ,0);

[0148] Under the first simulation operation strategy, the expression for the heat waste of the solar thermal power plant is determined as follows:

[0149] P b(i) =max(P w(i) +P pv(i) -P 0(i) -min(E CT (QC) cT -ES CT(i-1) ) / η E ), 0);

[0150] Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) -max(P w(i) +P pv(i) -P 0(i) -P b(i) ,0)),0);

[0151] Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i; b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let E be the power generation capacity of the photovoltaic power station at time i; CT The power of the molten salt heater in the solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in the solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) The heat flowing from the thermal storage system to the steam-water circulation system at time i.

[0152] In some embodiments of the present invention, the simulation operation strategy may optionally include: a second simulation operation strategy;

[0153] Under the second simulation operation strategy, the expression for determining the output power that the solar thermal power plant needs to provide at the current moment is as follows:

[0154] P cT(i) =max(P 0(i) -P w(i) -P pv(i) C cT *δ cT );

[0155] Under the second simulation operation strategy, the expression for the heat waste of the solar thermal power plant is determined as follows:

[0156] P b(i) =max(P w(i) +P pv(i) -(P 0(i) -C cT *δ cT )-min(E CT (QC) cT -ES CT(i-1) ) / η E ), 0);

[0157] Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) )-max((P w(i) +P pv(i) -P 0(i) +C cT *δ cT -P b(i) )*η E ,0),0);

[0158] Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i; b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let C be the power generation capacity of the photovoltaic power station at time i; cT δ represents the installed capacity of the solar thermal power plant; cT E represents the minimum load required for the sustainable operation of the steam turbine in the solar thermal power plant under the current operating strategy. CT The power of the molten salt heater in the solar thermal power plant; QC cTThe total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in the solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) The heat flowing from the thermal storage system to the steam-water circulation system at time i.

[0159] The integrated power plant simulation operation and control device provided in this application embodiment can achieve... Figures 1 to 5b The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0160] This invention provides an electronic device 70, see [link to relevant documentation]. Figure 7 As shown, Figure 7 This is a schematic diagram of the electronic device 70 according to an embodiment of the present invention, including a processor 71, a memory 72, and a program or instructions stored in the memory 72 and executable on the processor 71. When the program or instructions are executed by the processor, they implement the steps in any of the integrated power plant simulation operation control methods of the present invention.

[0161] This invention provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, it implements the various processes of the embodiment of the integrated power plant simulation operation and control method as described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0162] The readable storage medium may include, for example, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0163] This invention also provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, they implement the various processes of the above-mentioned integrated power plant simulation operation control method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0164] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A simulation operation and control method for an integrated power plant, characterized in that, The integrated power station includes: a solar thermal power station, a wind power station, a photovoltaic power station, a steam-water circulation system, and a thermal storage system; The simulation operation control method includes: The hourly heat collection data of the solar thermal power plant is determined based on the location of the solar thermal power plant and the target concentrating heat collection area of ​​the solar thermal power plant. Obtain the preset wind power generation power of the wind power station and the photovoltaic power generation power of the photovoltaic power station; based on the hourly heat collection data, the wind power generation power and the photovoltaic power generation power, simulate the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system to obtain a steam-water circulation efficiency-solar thermal power station load relationship mapping diagram. The simulation operation strategy of the integrated power plant is determined, and the simulation operation control of the integrated power plant is carried out according to the simulation operation strategy and the mapping diagram of steam-water cycle efficiency-solar thermal power plant load relationship.

2. The simulation operation and control method for integrated power plants according to claim 1, characterized in that, The objective function for simulation operation control is determined by the renewable energy curtailment rate and the refueling rate of the integrated power station.

3. The simulation operation and control method for integrated power plants according to claim 2, characterized in that, The integrated power station also includes: a combustion supplementation system; The expression for the objective function is as follows: Where, η b η represents the renewable energy curtailment rate of the integrated power station; n P represents the afterburning rate of the integrated power plant. b(i) For time i, the amount of wind and solar power curtailment; Q b(i) Let η be the amount of heat wasted by the solar thermal power plant at time i; CT0 P represents the average system efficiency of the steam-water circulation system. w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let Q be the power generation capacity of the photovoltaic power station at time i; CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; n(i) η is the heat flowing from the afterburning system to the steam-water circulation system at time i; CT(i) Let P be the system efficiency of the steam-water circulation system at time i; 0(i) Let be the power supply load that the integrated power station needs to meet at time i; ε is the preset threshold for the new energy curtailment rate. This is the preset afterburning rate threshold.

4. The simulation operation and control method for integrated power plants according to claim 3, characterized in that, The threshold value ε for the renewable energy curtailment rate includes: ε = 0.1; and / or The afterburning rate threshold The possible values ​​include:

5. The simulation operation and control method for integrated power plants according to claim 1, characterized in that, The integrated power plant is simulated and controlled according to the simulation operation strategy and the steam-water cycle efficiency-solar power plant load relationship mapping diagram, including: Determine the power output that the solar thermal power plant needs to provide at the current moment; Based on the output required by the solar thermal power plant and the mapping diagram of the relationship between the steam-water circulation efficiency and the solar thermal power plant load, the heat flowing from the thermal storage system to the steam-water circulation system is determined. Determine the amount of heat wasted by the solar thermal power plant; Based on the heat flowing from the thermal storage system to the steam-water circulation system and the discarded heat, the predicted heat storage capacity of the thermal storage system is determined, and the integrated power station is simulated and controlled based on the predicted heat storage capacity.

6. The simulation operation and control method for integrated power plants according to claim 5, characterized in that, The simulation operation strategy includes: a first simulation operation strategy; Under the first simulation operation strategy, the expression for determining the output power that the solar thermal power plant needs to provide at the current moment is as follows: P cT(i) =max(P 0(i) -P w(i) -P pv(i) ,0); Under the first simulation operation strategy, the expression for the heat waste of the solar thermal power plant is determined as follows: P b(i) =max(P w(i) +P pv(i) -P 0(i) -min(E CT ,(QC cT -IS CT(i-1) ) / η E ),0); Q b(i) =max(Q CT(i) -Q g(i) -(QC cT -ES CT(i-1) -max(P w(i) +P pv(i) -P 0(i) -P b(i) ,0)),0); Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i; b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let E be the power generation capacity of the photovoltaic power station at time i; CT The power of the molten salt heater in the solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in the solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) The heat flowing from the thermal storage system to the steam-water circulation system at time i.

7. The simulation operation and control method for integrated power plants according to claim 5, characterized in that, The simulation operation strategy includes: a second simulation operation strategy; Under the second simulation operation strategy, the expression for determining the output power that the solar thermal power plant needs to provide at the current moment is as follows: P cT(i) =max(P 0(i) -P w(i) -P pv(i) ,C cT *δ cT ); Under the second simulation operation strategy, the expression for the heat waste of the solar thermal power plant is determined as follows: P b(i) =max(P w(i) +P pv(i) -(P 0(i) -C cT *d cT )-min(E CT ,(QC cT -ES CT(i-1) ) / or E ),0); Q b(i) =max(Q cT(i) -Q g(i) -(QC cT -ES CT(i-1) )-max((P w(i) +P pv(i) -P 0(i) +C cT *δ cT -P b(i) )*η E ,0),0); Among them, P cT(i) P represents the power output required by the solar thermal power plant at time i; b(i) For time i, the amount of wind and solar power curtailment; Q b(i) P represents the amount of heat wasted by the solar thermal power plant at time i; 0(i) Let P be the power supply load that the integrated power station needs to meet at time i; w(i) Let P be the power generation capacity of the wind power station at time i; pv(i) Let C be the power generation capacity of the photovoltaic power station at time i; cT δ represents the installed capacity of the solar thermal power plant; cT E represents the minimum load required for the sustainable operation of the steam turbine in the solar thermal power plant under the current operating strategy. CT The power of the molten salt heater in the solar thermal power plant; QC cT The total thermal storage capacity of the solar thermal power plant; ES CT(i-1) η represents the thermal storage level of the thermal storage system at time i-1; E Q represents the efficiency of the molten salt heater in the solar thermal power plant. CT(i) Q represents the heat generated by the concentrating solar collector system in the solar thermal power plant at time i; g(i) The heat flowing from the thermal storage system to the steam-water circulation system at time i.

8. A simulation operation control device for an integrated power plant, characterized in that, The integrated power station includes: a solar thermal power station, a wind power station, a photovoltaic power station, a steam-water circulation system, and a thermal storage system; The simulation operation control device includes: The execution module is used to determine the hourly heat collection data of the solar thermal power plant based on the location of the solar thermal power plant and the target concentrating heat collection area of ​​the solar thermal power plant. The simulation module is used to obtain the preset wind power generation power of the wind power station and the photovoltaic power generation power of the photovoltaic power station; based on the hourly heat collection data, the wind power generation power and the photovoltaic power generation power, the heat transfer and thermoelectric conversion between the steam-water circulation system and the thermal storage system are simulated to obtain a mapping diagram of the steam-water circulation efficiency-solar thermal power station load relationship. The scheduling module is used to determine the simulation operation strategy of the integrated power plant, and to perform simulation operation control of the integrated power plant according to the simulation operation strategy and the mapping diagram of the steam-water cycle efficiency-solar thermal power plant load relationship.

9. An electronic device, characterized in that: It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein when the program or instructions are executed by the processor, they implement the steps in the simulation operation and control method of the integrated power plant as described in any one of claims 1 to 7.

10. A readable storage medium, characterized in that: The readable storage medium stores a program or instructions, which, when executed by a processor, implement the steps in the simulation operation and control method of the integrated power plant as described in any one of claims 1 to 7.

11. A computer program product, characterized in that, It includes computer instructions, which, when executed by a processor, implement the steps of the simulation operation and control method for an integrated power plant as described in any one of claims 1 to 7.

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