CN114254946A - New energy power generation equivalent annual cost comparison method, system, equipment and storage medium - Google Patents
New energy power generation equivalent annual cost comparison method, system, equipment and storage mediumDownload PDFInfo
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Abstract
Description
Technical Field
The invention relates to the field of power system planning and operation scheduling, in particular to a new energy power generation equivalent annual cost comparison method, a system, equipment and a storage medium.
Background
From the development prospect of the power system, the new energy power generation occupation ratio requirement is higher and higher, and the new energy consumption occupation ratio requirement is completed only by wind power and photovoltaic, so that the new energy power rejection rate is high, and even the new energy consumption occupation ratio target cannot be completed. Solar thermal power generation technology (CSP, referred to as photo-thermal for short) has the characteristics of cleanness, good regulation performance and the like, and photo-thermal power generation is equivalent to photovoltaic power generation equipped with energy storage. Under the condition, the comparison between the photo-thermal power generation and the photovoltaic power generation and energy storage power station has important significance for reasonably developing photo-thermal power and evaluating the prospect of the photo-thermal power generation.
Disclosure of Invention
The invention provides a new energy power generation equivalent annual cost comparison method, a system, equipment and a storage medium, and aims to solve the problem of comparison between the advantages and disadvantages of existing photo-thermal power generation and energy storage and photovoltaic power generation. The invention can comprehensively evaluate the cost of photo-thermal power generation, energy storage and photovoltaic power generation, and provides reference for the construction of photo-thermal power generation, photovoltaic power generation and energy storage power stations.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for comparing equivalent annual cost of new energy power generation comprises the following steps:
giving a photo-thermal scale, performing annual production simulation, calculating system operation indexes such as new energy generating capacity, coal consumption, new energy electricity abandonment rate and the like, and further calculating the annual cost of photo-thermal power generation;
replacing photo-thermal power generation by an energy storage power station with the same installed scale, calculating the photovoltaic power generation scale required to be configured when the electric quantity of new energy is not changed through annual production simulation, and further calculating the annual cost of energy storage and photovoltaic, so that the optimal energy storage time length of the energy storage power station and the photovoltaic power generation scale required to be configured are determined;
and judging whether the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements or not through the difference value of the photo-thermal power generation annual cost and the annual cost of the energy storage power station photovoltaic power generation, outputting a calculation result if the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements, and planning and operating and scheduling the power system according to the calculation result.
As a further improvement of the invention, the annual production simulation mode comprises power supply planning, load prediction, new energy power generation output characteristics, a daily load characteristic curve, an annual load characteristic curve and a direct current transmission curve.
As a further improvement of the invention, the energy storage installation is the same as the photo-thermal installation, and under the condition that the generated energy of new energy is not changed, the photovoltaic power generation scale of the energy storage configuration is calculated.
As a further improvement of the present invention, the calculating of the optimal energy storage duration of the energy storage power station and the photovoltaic power generation scale to be configured specifically includes:
replacing photo-thermal power generation with energy storage power stations of the same installed scale, giving initial energy storage duration, performing annual production simulation, and calculating the photovoltaic power generation scale, system coal consumption and new energy abandon rate of the energy storage power stations to be configured by taking the generated energy of the same new energy accepted by the system as constraint;
repeatedly calculating the photovoltaic power generation scale, the system coal consumption and the new energy power abandon rate which need to be configured by the energy storage power station under different energy storage time lengths;
calculating the annual cost of the energy storage power station and the photovoltaic power generation under different energy storage time lengths;
and selecting the energy storage time length with the lowest annual cost and the photovoltaic power generation scale as the optimal energy storage time length of the energy storage power station and the photovoltaic power generation scale to be configured.
As a further improvement of the method, the photovoltaic power generation installation with different energy storage time lengths is calculated under the constraint that the generated energy of the new energy is not changed.
As a further improvement of the invention, the equivalent annual cost difference calculation method of the photo-thermal power generation and the energy storage and photovoltaic power generation comprises the following steps:
Q＝TCSP-TC
wherein, TCSPThe cost for the photo-thermal power generation is TCCost expenditure of energy storage plus photovoltaic;
the cost expenditure of the photo-thermal power generation is as follows:
TCSP＝rCSPpCSPCCSP+αCSPpCSPCCSP
in the formula: r isCSPThe coefficient of capital recovery in the photothermal life cycle; p is a radical ofCSPThe unit cost of photo-thermal is adopted; alpha is alphaCSPThe maintenance rate is the photo-thermal operation rate.
The cost expenditure of energy storage plus photovoltaic is:
TC＝rHpHCHh+αHpHCHh+rPpPCP+αPpPCP+pMMC
in the formula: r isHThe capital recovery factor in the energy storage life cycle; p is a radical ofHCost for unit capacity of energy storage; h is the energy storage duration; alpha is alphaHEnergy storage operation maintenance rates; r isPThe coefficient of capital recovery within the photovoltaic life cycle; p is a radical ofPThe manufacturing cost is photovoltaic unit kilowatt; alpha is alphaPPhotovoltaic operation maintenance rates; p is a radical ofMMarking the coal price; mCThe energy storage and photovoltaic system replaces the coal consumption variable quantity of the system after the photo-thermal power generation.
As a further improvement of the invention, if the difference value of the equivalent annual cost of the photo-thermal power generation and the energy storage and photovoltaic power generation is more than 0, the construction of the energy storage and photovoltaic power generation is economical, otherwise the construction of the photo-thermal power generation is economical.
An equivalent annual cost comparison system for new energy power generation, comprising:
the calculation module gives a photo-thermal scale, simulates annual production, calculates system operation indexes such as new energy generating capacity, coal consumption, new energy electricity abandonment rate and the like, and further calculates the annual cost of photo-thermal power generation; replacing photo-thermal power generation by an energy storage power station with the same installed scale, calculating the photovoltaic power generation scale required to be configured for energy storage and the annual cost of energy storage and photovoltaic under the condition that the electric quantity of new energy is not changed through annual production simulation, and further determining the optimal energy storage time length of the energy storage power station and the photovoltaic power generation scale required to be configured;
and the judging module is used for judging whether the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements or not through the difference value of the photo-thermal power generation annual cost and the annual cost of the energy storage power station photovoltaic power generation, outputting a calculation result if the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements, and planning and operating and scheduling the power system according to the calculation result.
An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method for comparing annual equivalent costs of new energy power generation when executing the computer program.
A computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method for comparing annual equivalent costs of new energy power generation.
Compared with the prior art, the invention has the beneficial effects that:
the method takes the factors of capacity benefit, electric quantity benefit, energy storage duration and the like of photo-thermal power generation, energy storage and photovoltaic power generation into consideration, takes the system accepting new energy power generation as constraint, adopts production simulation for 8760 hours, and can comprehensively evaluate the capacity benefit and the electric quantity benefit of the photo-thermal power generation, the energy storage and photovoltaic power generation. By adopting the method, the national economic benefit of the system is the maximum target, the equivalent annual cost of photo-thermal power generation, energy storage and photovoltaic power generation is comprehensively evaluated, the planning and operation scheduling of the power system are carried out according to the calculation result, and reference is provided for the reasonable development of photovoltaic power generation, electrochemical energy storage and photo-thermal power generation.
Drawings
FIG. 1 is a computational flow diagram of the present invention.
FIG. 2 is a schematic diagram of a comparison system for comparing the annual cost equivalent of photo-thermal power generation and energy storage plus photovoltaic power generation;
fig. 3 is a schematic structural diagram of an electronic device.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
As shown in fig. 1, a method for comparing the equivalent annual cost of photo-thermal power generation and energy storage plus photovoltaic power generation comprises the following steps:
1) reading in system boundary conditions, technical parameters, new energy characteristics, load characteristics and the like;
2) giving a photo-thermal power generation scale, simulating production for 8760h, and calculating the generated energy, coal consumption, new energy power abandon rate and the like of new energy accepted by the system;
3) replacing photo-thermal power generation with energy storage power stations of the same installed scale, giving initial energy storage time, performing production simulation for 8760h, and calculating the photovoltaic power generation scale, system coal consumption, new energy power abandon rate and the like of the energy storage power stations, wherein the photovoltaic power generation scale, the system coal consumption, the new energy power abandon rate and the like are required to be configured by taking the system to accept the same new energy power generation amount as constraint;
4) repeating the steps, and calculating the photovoltaic power generation scale, the system coal consumption, the new energy power abandon rate and the like which need to be configured by the energy storage power station under different energy storage time lengths;
5) calculating the annual cost of the energy storage power station and the photovoltaic power generation under different energy storage durations, wherein the lowest one is the optimal energy storage duration of the energy storage power station and the photovoltaic power generation scale to be configured;
6) and calculating the annual cost of the photo-thermal power generation, comparing the annual cost with the annual cost of the energy storage power station and the photovoltaic power generation, outputting a calculation result, and planning and operating the power system according to the calculation result. The cost expenditure of the photo-thermal power generation is as follows:
TCSP＝rCSPpCSPCCSP+αCSPpCSPCCSP (1)
in the formula: r isCSPThe coefficient of capital recovery in the photothermal life cycle; p is a radical ofCSPThe unit cost of photo-thermal is adopted; alpha is alphaCSPThe maintenance rate is the photo-thermal operation rate.
The cost expenditure of energy storage plus photovoltaic is:
TC＝rHpHCHh+αHpHCHh+rPpPCP+αPpPCP+pMMC (2)
in the formula: r isHFor capital recovery factor in energy storage life cycle；pHCost for unit capacity of energy storage; h is the energy storage duration; alpha is alphaHEnergy storage operation maintenance rates; r isPThe coefficient of capital recovery within the photovoltaic life cycle; p is a radical ofPThe manufacturing cost is photovoltaic unit kilowatt; alpha is alphaPPhotovoltaic operation maintenance rates; p is a radical ofMMarking the coal price; mCThe energy storage and photovoltaic system replaces the coal consumption variable quantity of the system after the photo-thermal power generation.
The equivalent annual cost difference between the photo-thermal power generation and the energy storage and photovoltaic power generation is as follows:
Q＝TCSP-TC (3)
when Q is larger than 0, it is economical to build energy storage and photovoltaic power generation, otherwise it is economical to build photo-thermal power generation.
The principle of the invention is as follows: according to the method, the system is used for accepting the generated energy of new energy and is not changed as constraint, capacity benefits and electric quantity benefits of photo-thermal power generation and energy storage and photovoltaic power generation are comprehensively considered, a 8760h production simulation program is adopted for production simulation, and various factors such as power supply coordinated operation, photo-thermal unit start-stop and energy storage day-crossing adjustment are considered.
The following description will be made in detail by taking a certain actual system as an example. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Examples
The invention discloses a method for comparing equivalent annual cost of photo-thermal power generation and energy storage and photovoltaic power generation, which comprises the following specific steps of:
(1) reading in the information of technical parameters such as power supply planning, load prediction, new energy power generation, daily load characteristic curve, annual load characteristic curve, photo-thermal power generation cost, photovoltaic power generation cost, energy storage cost and the like of each province, and displaying the information in table 1.
TABLE 1 construction cost parameters
(2) And solving the photovoltaic power generation scale and the energy storage time length which are required to be configured by the energy storage power station under the constraint of the same new energy generated energy based on the photo-thermal power generation and the energy storage and photovoltaic power generation, wherein the calculation results are shown in table 2.
It can be seen that: 1) 100-ten-thousand-watt photo-thermal power generation is equivalent to 100-thousand-kilowatt energy storage and 250-thousand-kilowatt photovoltaic power generation; 2)200 ten thousand kilowatt photo-thermal power generation is equivalent to 200 ten thousand kilowatt energy storage and 550 ten thousand kilowatt photovoltaic power generation. 3) Because there is certain loss in the energy storage, therefore under the same circumstances of system new forms of energy admission electric quantity, the system coal consumption of energy storage plus photovoltaic is a little higher than light and heat.
Table 2 results of production simulation runs
(3) And (4) calculating equivalent annual cost of photo-thermal power generation, energy storage and photovoltaic power generation, wherein the calculation results are shown in tables 3-4. It can be seen that: 1) under the condition that the electrochemical energy storage cost is 1600 yuan/kilowatt hour, the equivalent annual cost of the photo-thermal power generation is lower than that of the energy storage and the photo-thermal power generation; 2) the energy storage cost is reduced to 1000 yuan/kilowatt hour, and the equivalent annual cost of energy storage and photovoltaic is lower than that of photo-thermal power generation.
TABLE 3 evaluation of the benefits of the photothermal power station (energy cost 1600 yuan/kilowatt hour)
TABLE 4 evaluation of benefits in photothermal power station (energy cost 1000 Yuan/kilowatt hour)
Another object of the present invention is to provide a system for comparing annual costs equivalent to those of photo-thermal power generation and stored energy plus photovoltaic power generation, as shown in fig. 2, wherein the system comprises:
the acquisition module is used for acquiring boundary conditions such as system technical parameters, new energy consumption index constraints, power supply scale, compliance characteristics and new energy characteristics;
the first calculation module is used for giving a photo-thermal scale, performing annual production simulation, calculating system operation indexes such as new energy generating capacity, coal consumption and new energy electricity abandonment rate and further calculating the annual cost of photo-thermal power generation;
the second calculation module is used for replacing photo-thermal power generation with an energy storage power station with the same installed scale, calculating the photovoltaic power generation scale required to be configured for energy storage under the condition that the electric quantity of new energy is not changed through annual production simulation, and further calculating the annual cost of energy storage and photovoltaic, so that the optimal energy storage time length of the energy storage power station and the photovoltaic power generation scale required to be configured are determined;
and the judging module is used for judging whether the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements or not through the difference value of the photo-thermal power generation annual cost and the annual cost of the energy storage power station photovoltaic power generation, outputting a calculation result if the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements, and planning and operating and scheduling the power system according to the calculation result.
A third object of the present invention is to provide an electronic device, as shown in fig. 3, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the equivalent annual cost comparison method for photo-thermal power generation and energy storage plus photovoltaic power generation when executing the computer program.
A fourth object of the present invention is to provide a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the equivalent annual cost comparison method for photo-thermal power generation and energy storage plus photovoltaic power generation.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A new energy power generation equivalent annual cost comparison method is characterized by comprising the following steps:
giving a photo-thermal scale, performing annual production simulation, calculating system operation indexes such as new energy generating capacity, coal consumption, new energy electricity abandonment rate and the like, and further calculating the annual cost of photo-thermal power generation;
replacing photo-thermal power generation by an energy storage power station with the same installed scale, calculating the photovoltaic power generation scale required to be configured when the electric quantity of new energy is not changed through annual production simulation, and further calculating the annual cost of energy storage and photovoltaic, so that the optimal energy storage time length of the energy storage power station and the photovoltaic power generation scale required to be configured are determined;
and judging whether the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements or not through the difference value of the photo-thermal power generation annual cost and the annual cost of the energy storage power station photovoltaic power generation, outputting a calculation result if the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements, and planning and operating and scheduling the power system according to the calculation result.
2. The method for comparing the equivalent annual cost of new energy power generation according to claim 1, wherein the annual production simulation mode comprises power supply planning, load prediction, new energy power generation output characteristics, a daily load characteristic curve, an annual load characteristic curve and a direct current transmission curve.
3. The equivalent annual cost comparison method for new energy power generation according to claim 1, wherein the energy storage installation is the same as the photo-thermal installation, and under the condition that the power generation amount of the new energy is not changed, the photovoltaic power generation scale required to be configured for energy storage is calculated.
4. The method for comparing the equivalent annual cost of new energy power generation according to claim 1, wherein the calculation of the optimal energy storage duration of the energy storage power station and the photovoltaic power generation scale to be configured specifically comprises:
replacing photo-thermal power generation with energy storage power stations of the same installed scale, giving initial energy storage duration, performing annual production simulation, and calculating the photovoltaic power generation scale, system coal consumption and new energy abandon rate of the energy storage power stations to be configured by taking the generated energy of the same new energy accepted by the system as constraint;
repeatedly calculating the photovoltaic power generation scale, the system coal consumption and the new energy power abandon rate which need to be configured by the energy storage power station under different energy storage time lengths;
calculating the annual cost of the energy storage power station and the photovoltaic power generation under different energy storage time lengths;
and selecting the energy storage time with the lowest annual cost and the photovoltaic installation as the optimal energy storage time of the energy storage power station and the photovoltaic power generation scale to be configured.
5. The equivalent annual cost comparison method for new energy power generation according to claim 4, wherein the photovoltaic power generation installation with different energy storage time lengths is calculated under the constraint that the power generation amount of the new energy is not changed.
6. The equivalent annual cost comparison method for new energy power generation according to claim 1, wherein the equivalent annual cost difference calculation method for photo-thermal power generation and energy storage plus photovoltaic power generation comprises the following steps:
Q＝TCSP-TC
wherein, TCSPThe cost for the photo-thermal power generation is TCCost expenditure of energy storage plus photovoltaic;
the cost expenditure of the photo-thermal power generation is as follows:
TCSP＝rCSPpCSPCCSP+αCSPpCSPCCSP
in the formula: r isCSPThe coefficient of capital recovery in the photothermal life cycle; p is a radical ofCSPThe unit cost of photo-thermal is adopted; alpha is alphaCSPMaintenance rates for photothermal operation;
the cost expenditure of energy storage plus photovoltaic is:
TC＝rHpHCHh+αHpHCHh+rPpPCP+αPpPCP+pMMC
in the formula: r isHThe capital recovery factor in the energy storage life cycle; p is a radical ofHCost for unit capacity of energy storage; h is the energy storage duration; alpha is alphaHEnergy storage operation maintenance rates; r isPThe coefficient of capital recovery within the photovoltaic life cycle; p is a radical ofPThe manufacturing cost is photovoltaic unit kilowatt; alpha is alphaPPhotovoltaic operation maintenance rates; p is a radical ofMMarking the coal price; mCThe energy storage and photovoltaic system replaces the coal consumption variable quantity of the system after the photo-thermal power generation.
7. The method for comparing the equivalent annual cost of new energy power generation according to claim 1, wherein the difference between the equivalent annual cost of photo-thermal power generation and the equivalent annual cost of stored energy plus photovoltaic power generation is greater than 0, and the construction of stored energy plus photovoltaic power generation is economical, otherwise the construction of photo-thermal power generation is economical.
8. A new energy power generation equivalent annual cost comparison system is characterized by comprising:
the first calculation module is used for giving a photo-thermal scale, performing annual production simulation, calculating system operation indexes such as new energy generating capacity, coal consumption and new energy electricity abandonment rate and further calculating the annual cost of photo-thermal power generation;
the second calculation module is used for replacing photo-thermal power generation with an energy storage power station with the same installed scale, calculating the photovoltaic power generation scale required to be configured for energy storage under the condition that the electric quantity of new energy is not changed through annual production simulation, and further calculating the annual cost of energy storage and photovoltaic, so that the optimal energy storage time length of the energy storage power station and the photovoltaic power generation scale required to be configured are determined;
and the judging module is used for judging whether the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements or not through the difference value of the photo-thermal power generation annual cost and the annual cost of the energy storage power station photovoltaic power generation, outputting a calculation result if the photo-thermal power generation and the energy storage photovoltaic power generation meet the economic requirements, and planning and operating and scheduling the power system according to the calculation result.
9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the new energy power generation equivalent annual cost comparison method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the new energy power generation equivalent annual cost comparison method according to any one of claims 1 to 7.
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| CN116316740A (en)* | 2023-05-19 | 2023-06-23 | 中国能源建设集团湖南省电力设计院有限公司 | Energy storage replacing thermal power capacity efficiency calculation method considering new energy influence |
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