New energy power generation equivalent annual cost comparison method, system, device and storage medium

Abstract

The present invention proposes a method, system, equipment and storage medium for comparing the equivalent annual costs of renewable energy power generation, including: given a solar thermal scale, annual production simulation, calculation of system operation indicators, renewable energy power generation, coal consumption, and renewable energy abandonment rate; using a storage power station with the same installed capacity to replace solar thermal power generation, according to the annual production simulation and the annual cost of the energy storage power station, the optimal energy storage duration and the photovoltaic power generation scale to be configured; and then calculating the annual cost of solar thermal power generation; judging whether solar thermal power generation and energy storage plus photovoltaic power generation meet economic requirements through the difference between the annual cost of solar thermal power generation and the annual cost of the energy storage power station plus photovoltaic power generation, and outputting the calculation results if they meet, and planning and operating the power system according to the calculation results. The present invention adopts this method to maximize the national economic benefits of the system, comprehensively evaluate the annual costs of solar thermal power generation, photovoltaic power generation plus energy storage, and provide a reference for the rational development of photovoltaic power generation, electrochemical energy storage, and solar thermal power generation.

Description

Technical Field

[0001] The present invention relates to the field of power system planning and operation dispatching, and in particular to a method, system, device and storage medium for comparing equivalent annual costs of new energy power generation. Background Art

[0002] From the perspective of the development prospects of the power system, the requirements for the proportion of new energy power generation will become higher and higher. Relying solely on wind power and photovoltaics to meet the requirements for the proportion of new energy consumption will lead to a high rate of new energy abandonment, and even fail to meet the new energy consumption proportion target. Solar thermal power generation technology (concentrating solar power, CSP, referred to as solar thermal) has the characteristics of cleanliness and good regulation performance. Solar thermal power generation is equivalent to photovoltaic power generation equipped with energy storage. In this case, the comparison between solar thermal power generation and photovoltaic power generation plus energy storage power stations is of great significance for the rational development of solar thermal and the evaluation of the prospects of solar thermal power generation. Summary of the invention

[0003] In order to solve the problem of comparing the advantages and disadvantages of existing solar thermal power generation and energy storage plus photovoltaic power generation, the present invention proposes a method, system, device and storage medium for comparing the equivalent annual cost of new energy power generation. The present invention can comprehensively evaluate the cost of solar thermal power generation and energy storage plus photovoltaic power generation, and provide a reference for the construction of solar thermal power generation, photovoltaic power generation and energy storage power stations.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A method for comparing equivalent annual costs of renewable energy power generation comprises the following steps:

[0006] Given the scale of CSP, annual production simulation is performed to calculate system operation indicators such as renewable energy power generation, coal consumption, renewable energy power abandonment rate, and then calculate the annual cost of CSP power generation;

[0007] Use energy storage power stations with the same installed capacity to replace solar thermal power generation. Through annual production simulation, calculate the scale of photovoltaic power generation that needs to be configured for energy storage when the amount of new energy power remains unchanged, and then calculate the annual cost of energy storage plus photovoltaic power generation, so as to determine the optimal energy storage duration of the energy storage power station and the scale of photovoltaic power generation that needs to be configured;

[0008] The difference between the annual cost of CSP and the annual cost of energy storage power stations plus photovoltaic power generation is used to determine whether CSP and energy storage plus photovoltaic power generation meet economic requirements. If they do, the calculation results are output and the power system planning and operation scheduling are carried out based on the calculation results.

[0009] As a further improvement of the present invention, the annual production simulation method includes power supply planning, load forecasting, new energy power generation output characteristics, daily load characteristic curve, annual load characteristic curve and DC power transmission curve.

[0010] As a further improvement of the present invention, the energy storage installed capacity is the same as the solar thermal installed capacity, and the photovoltaic power generation scale of the energy storage configuration is calculated under the condition that the new energy power generation remains unchanged.

[0011] As a further improvement of the present invention, calculating the optimal energy storage duration of the energy storage power station and the photovoltaic power generation scale to be configured specifically includes:

[0012] Use energy storage power stations with the same installed capacity to replace solar thermal power generation. Given the initial energy storage duration and annual production simulation, with the system accepting the same renewable energy power generation as a constraint, calculate the photovoltaic power generation scale, system coal consumption, and renewable energy abandonment rate that the energy storage power station needs to configure;

[0013] Repeatedly calculate the photovoltaic power generation scale, system coal consumption, and new energy abandonment rate required for energy storage power stations under different energy storage durations;

[0014] Calculate the annual costs of energy storage power stations and photovoltaic power generation under different energy storage durations;

[0015] The energy storage duration and photovoltaic power generation scale with the lowest annual cost are selected as the optimal energy storage duration and photovoltaic power generation scale required for the energy storage power station.

[0016] As a further improvement of the present invention, under the constraint that the amount of electricity generated by new energy remains unchanged, the photovoltaic power generation capacity with different energy storage durations is calculated.

[0017] As a further improvement of the present invention, the calculation method of the equivalent annual cost difference between solar thermal power generation and energy storage plus photovoltaic power generation is:

[0018] Q=T CSP -T C

[0019] Among them, T CSP is the cost of CSP, and T C The cost expenditure of energy storage plus photovoltaics;

[0020] The cost of CSP is:

[0021] T CSP =r CSP p CSP C CSP +α CSP p CSP C CSP

[0022] Where: r CSP is the capital recovery factor during the life cycle of CSP; p CSP is the unit cost of light and heat; α CSP This is the maintenance rate for solar thermal operation.

[0023] The cost of energy storage plus photovoltaic is:

[0024] T C =r H p H C H h+α H p H C H h+r P p P C P +α P p P C P +p M M C

[0025] Where: r H is the capital recovery coefficient during the life cycle of energy storage; p H is the unit capacity cost of energy storage; h is the energy storage duration; α H Energy storage operation and maintenance rate; P is the capital recovery coefficient in the photovoltaic life cycle; p P is the photovoltaic unit kilowatt cost; α P Photovoltaic operation and maintenance rate; p M is the standard coal price; M C It is the change in coal consumption of the system after replacing CSP with energy storage plus photovoltaics.

[0026] As a further improvement of the present invention, if the difference in equivalent annual costs between solar thermal power generation and energy storage plus photovoltaic power generation is greater than 0, it is economical to build energy storage plus photovoltaic power generation; otherwise, it is economical to build solar thermal power generation.

[0027] A system for comparing equivalent annual costs of renewable energy power generation, comprising:

[0028] The calculation module, given the scale of solar thermal power generation, simulates annual production, calculates system operation indicators such as renewable energy power generation, coal consumption, renewable energy power abandonment rate, and then calculates the annual cost of solar thermal power generation; uses energy storage power stations with the same installed capacity to replace solar thermal power generation, and through annual production simulation, calculates the scale of photovoltaic power generation that needs to be configured for energy storage when the amount of renewable energy power remains unchanged, and the annual cost of energy storage plus photovoltaic power generation, and then determines the optimal energy storage duration of the energy storage power station and the scale of photovoltaic power generation that needs to be configured;

[0029] The judgment module is used to judge whether CSP and energy storage plus photovoltaic power generation meet the economic requirements through the difference between the annual cost of CSP and the annual cost of energy storage power station plus photovoltaic power generation. If so, the calculation results are output and the power system planning and operation scheduling are carried out according to the calculation results.

[0030] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for comparing equivalent annual costs of renewable energy power generation are implemented.

[0031] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for comparing equivalent annual costs of renewable energy power generation.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] The method of the present invention takes into account the capacity benefit, electricity benefit, energy storage duration and other factors of CSP and energy storage plus photovoltaic power generation, and takes the system's acceptance of new energy power generation as a constraint. It uses 8760 hours of production simulation to comprehensively evaluate the capacity benefit and electricity benefit of CSP and energy storage plus photovoltaic power generation. This method can be used to maximize the national economic benefits of the system, comprehensively evaluate the equivalent annual costs of CSP and energy storage plus photovoltaic power generation, and plan and dispatch the power system based on the calculation results, providing a reference for the rational development of photovoltaic power generation, electrochemical energy storage, and CSP. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a calculation flow chart of the present invention.

[0035] Figure 2 A schematic diagram of the system structure for comparing equivalent annual costs of solar thermal power generation and energy storage plus photovoltaic power generation;

[0036] Figure 3 A schematic diagram of the electronic device structure. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] like Figure 1 As shown, a method for comparing the equivalent annual costs of CSP power generation and energy storage plus photovoltaic power generation includes the following steps:

[0039] 1) Read in system boundary conditions, technical parameters, new energy characteristics, load characteristics, etc.;

[0040] 2) Given the scale of CSP power generation, 8760h production simulation, calculate the renewable energy power generation, coal consumption, renewable energy abandonment rate, etc. accepted by the system;

[0041] 3) Use energy storage power stations with the same installed capacity to replace solar thermal power generation. Given the initial energy storage duration and 8760h production simulation, with the system accepting the same renewable energy power generation as a constraint, calculate the photovoltaic power generation scale, system coal consumption, renewable energy abandonment rate, etc. that the energy storage power station needs to configure;

[0042] 4) Repeat the above steps to calculate the photovoltaic power generation scale, system coal consumption, and new energy abandonment rate required for the energy storage power station under different energy storage durations;

[0043] 5) Calculate the annual costs of energy storage power stations and photovoltaic power generation under different energy storage durations, the lowest of which is the optimal energy storage duration of the energy storage power station and the photovoltaic power generation scale to be configured;

[0044] 6) Calculate the annual cost of CSP, compare it with the annual cost of energy storage power station plus photovoltaic power generation, output the calculation results, and carry out power system planning and operation scheduling based on the calculation results. The cost expenditure of CSP is:

[0045] T CSP =r CSP p CSP C CSP +α CSP p CSP C CSP (1)

[0046] Where: r CSP is the capital recovery factor during the life cycle of CSP; p CSP is the unit cost of light and heat; α CSP This is the maintenance rate for solar thermal operation.

[0047] The cost of energy storage plus photovoltaic is:

[0048] T C =r H p H C H h+α H p H C H h+r P p P C P +α P p P C P +p M M C (2)

[0049] Where: r H is the capital recovery coefficient during the life cycle of energy storage; p His the unit capacity cost of energy storage; h is the energy storage duration; α H Energy storage operation and maintenance rate; P is the capital recovery coefficient in the photovoltaic life cycle; p P is the photovoltaic unit kilowatt cost; α P Photovoltaic operation and maintenance rate; p M is the standard coal price; M C It is the change in coal consumption of the system after replacing CSP with energy storage plus photovoltaics.

[0050] The difference in equivalent annual costs between CSP and energy storage plus photovoltaic power generation is:

[0051] Q=T CSP -T C (3)

[0052] When Q is greater than 0, it is economical to build energy storage plus photovoltaic power generation, otherwise it is economical to build solar thermal power generation.

[0053] The principle of the present invention is: this method takes the system's acceptance of unchanged new energy power generation as a constraint, comprehensively considers the capacity efficiency and electricity efficiency of solar thermal power generation and energy storage plus photovoltaic power generation, and uses an 8760h production simulation program to perform production simulation, taking into account factors such as the coordinated operation of multiple power sources, the start and stop of solar thermal units, and the cross-day adjustment of energy storage.

[0054] The following is a detailed description using a certain actual system as an example. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present invention and its application.

[0055] Example

[0056] The present invention provides a method for comparing equivalent annual costs of solar thermal power generation and energy storage plus photovoltaic power generation, and the specific steps are as follows:

[0057] (1) Read in information on power supply planning, load forecast, new energy power generation, daily load characteristic curve, annual load characteristic curve, CSP power generation cost, photovoltaic power generation cost, energy storage cost and other technical parameters of each province and region, as shown in Table 1.

[0058] Table 1 Construction cost parameters

[0059]

[0060] (2) For CSP and energy storage plus photovoltaic power generation, under the constraint of the same renewable energy power generation, the photovoltaic power generation scale and energy storage duration required for the energy storage power station are calculated. The calculation results are shown in Table 2.

[0061] It can be seen that: 1) 1 million kilowatts of CSP power generation is equivalent to 1 million kilowatts of energy storage plus 2.5 million kilowatts of photovoltaic power generation; 2) 2 million kilowatts of CSP power generation is equivalent to 2 million kilowatts of energy storage plus 5.5 million kilowatts of photovoltaic power generation. 3) Due to certain losses in energy storage, when the system's new energy intake is the same, the system coal consumption of energy storage plus photovoltaics is slightly higher than that of CSP.

[0062] Table 2 Production simulation operation results

[0063]

[0064] (3) Calculate the equivalent annual cost of CSP and energy storage plus photovoltaic power generation, and the calculation results are shown in Tables 3 and 4. It can be seen that: 1) When the cost of electrochemical energy storage is 1,600 yuan / kWh, the equivalent annual cost of CSP is lower than that of energy storage plus photovoltaic power generation; 2) When the cost of energy storage is reduced to 1,000 yuan / kWh, the equivalent annual cost of energy storage plus photovoltaic power generation is lower than that of CSP.

[0065] Table 3 Benefit evaluation of CSP power station (energy storage cost 1600 yuan / kWh)

[0066]

[0067]

[0068] Table 4 Benefit evaluation of CSP power station (energy storage cost 1000 yuan / kWh)

[0069]

[0070] like Figure 2 As shown, another object of the present invention is to provide a system for comparing the equivalent annual costs of solar thermal power generation and energy storage plus photovoltaic power generation, which is characterized by comprising:

[0071] The acquisition module is used to obtain boundary conditions such as system technical parameters, new energy consumption index constraints, power supply scale, compliance characteristics, and new energy characteristics;

[0072] The first calculation module is used to calculate the annual production simulation of the given CSP scale, the system operation indicators such as the renewable energy power generation, coal consumption, renewable energy power abandonment rate, and so on, and then calculate the annual cost of CSP power generation;

[0073] The second calculation module is used to replace solar thermal power generation with energy storage power stations of the same installed capacity. Through annual production simulation, the scale of photovoltaic power generation that needs to be configured for energy storage is calculated when the amount of new energy power remains unchanged, and then the annual cost of energy storage plus photovoltaic power generation is calculated, so as to determine the optimal energy storage duration of the energy storage power station and the scale of photovoltaic power generation that needs to be configured;

[0074] The judgment module is used to judge whether CSP and energy storage plus photovoltaic power generation meet the economic requirements through the difference between the annual cost of CSP and the annual cost of energy storage power station plus photovoltaic power generation. If so, the calculation results are output and the power system planning and operation scheduling are carried out according to the calculation results.

[0075] like Figure 3 As shown, the third object of the present invention is to provide an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method for comparing the equivalent annual costs of solar thermal power generation and energy storage plus photovoltaic power generation are implemented.

[0076] The fourth object of the present invention is to provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, it implements the steps of the method for comparing the equivalent annual costs of solar thermal power generation and energy storage plus photovoltaic power generation.

[0077] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0078] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0079] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0080] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for comparing equivalent annual costs of renewable energy power generation, characterized in that: The following steps are involved: Given the scale of CSP, annual production simulation is performed to calculate the system operation indicators of renewable energy power generation, coal consumption, and renewable energy power abandonment rate, and then calculate the annual cost of CSP power generation; Use energy storage power stations with the same installed capacity to replace solar thermal power generation. Through annual production simulation, calculate the scale of photovoltaic power generation that needs to be configured for energy storage when the amount of new energy power remains unchanged, and then calculate the annual cost of energy storage plus photovoltaic power generation, so as to determine the optimal energy storage duration of the energy storage power station and the scale of photovoltaic power generation that needs to be configured; The difference between the annual cost of CSP and the annual cost of energy storage plus photovoltaic power generation is used to determine whether CSP and energy storage plus photovoltaic power generation meet economic requirements. If they do, the calculation results are output and the power system planning and operation scheduling are carried out based on the calculation results. Calculation of the optimal energy storage duration of the energy storage power station and the scale of photovoltaic power generation to be configured specifically includes: Use energy storage power stations with the same installed capacity to replace solar thermal power generation. Given the initial energy storage duration and annual production simulation, with the system accepting the same renewable energy power generation as a constraint, calculate the photovoltaic power generation scale, system coal consumption, and renewable energy abandonment rate that the energy storage power station needs to configure; Repeatedly calculate the photovoltaic power generation scale, system coal consumption, and new energy abandonment rate required for energy storage power stations under different energy storage durations; Calculate the annual costs of energy storage power stations and photovoltaic power generation under different energy storage durations; Select the energy storage duration and photovoltaic installed capacity with the lowest annual cost as the optimal energy storage duration and photovoltaic power generation scale to be configured for the energy storage power station; The calculation method for the equivalent annual cost difference between CSP power generation and energy storage plus photovoltaic power generation is: in, is the cost of CSP, The cost expenditure of energy storage plus photovoltaics; The cost of CSP is: Where: is the capital recovery factor during the life cycle of CSP; The unit cost of light and heat; It is the maintenance rate for CSP operation; The cost of energy storage plus photovoltaic is: Where: is the capital recovery factor during the life cycle of energy storage; The unit capacity cost of energy storage; h is the energy storage duration; Energy storage operation and maintenance fee rates; is the capital recovery factor during the photovoltaic life cycle; is the photovoltaic unit kilowatt cost; PV operation and maintenance rates; is the standard coal price; It is the change in coal consumption of the system after replacing CSP with energy storage plus photovoltaics.

2. A method for comparing annual costs of renewable energy power generation equivalent according to claim 1, characterized in that: The annual production simulation method includes power supply planning, load forecasting, new energy power generation output characteristics, daily load characteristic curve, annual load characteristic curve and DC power transmission curve.

3. A method for comparing equivalent annual costs of renewable energy power generation according to claim 1, characterized in that: The installed capacity of energy storage is the same as that of solar thermal power generation, and under the premise that the amount of new energy power generation remains unchanged, the scale of photovoltaic power generation required for energy storage is calculated.

4. A method for comparing equivalent annual costs of renewable energy power generation according to claim 1, characterized in that: Under the constraint of unchanged new energy power generation, calculate the photovoltaic power generation capacity with different energy storage durations.

5. A method for comparing equivalent annual costs of renewable energy power generation according to claim 1, characterized in that: If the difference in equivalent annual costs between CSP and energy storage plus photovoltaic power generation is greater than 0, it is economical to build energy storage plus photovoltaic power generation; otherwise, it is economical to build CSP.

6. A new energy power generation equivalent annual cost comparison system, based on the new energy power generation equivalent annual cost comparison method according to any one of claims 1 to 5, characterized in that: include: The first calculation module is used to calculate the annual production simulation of the given CSP scale, the system operation indicators such as the renewable energy power generation, coal consumption, renewable energy power abandonment rate, and so on, and then calculate the annual cost of CSP power generation; The second calculation module is used to replace solar thermal power generation with energy storage power stations of the same installed capacity. Through annual production simulation, the scale of photovoltaic power generation that needs to be configured for energy storage is calculated when the amount of new energy power remains unchanged, and then the annual cost of energy storage plus photovoltaic power generation is calculated, so as to determine the optimal energy storage duration of the energy storage power station and the scale of photovoltaic power generation that needs to be configured; The judgment module is used to judge whether CSP and energy storage plus photovoltaic power generation meet the economic requirements through the difference between the annual cost of CSP and the annual cost of energy storage power station plus photovoltaic power generation. If so, the calculation results are output and the power system planning and operation scheduling are carried out according to the calculation results.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for comparing the equivalent annual cost of new energy power generation as described in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method for comparing the equivalent annual cost of new energy power generation as described in any one of claims 1 to 5.

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