Economic evaluation method and system for novel energy storage in market environment

Abstract

The invention provides an economic evaluation method and system for novel energy storage in a market environment. The method comprises the following steps: evaluating the multivariate cost of the novel energy storage in the market environment; multi-element economic benefits of the novel energy storage system in the market environment are evaluated; and evaluating the multivariate economic evaluation indexes of the novel energy storage system in the market environment. According to the method, factors such as the initial investment cost, the operation and maintenance cost, the battery replacement cost, the capital cost, the charging cost and the fixed asset residual value of the energy storage power station are comprehensively considered, and a scientific decision basis is provided for a user; meanwhile, the economic benefits of the energy storage system are analyzed, such as spot goods arbitrage, power auxiliary service participation profit, capacity compensation and the like, and through a scientific and reasonable evaluation method, a decision basis is provided for investors, resource allocation is optimized, and sustainable development of the energy storage industry is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage economic evaluation, and in particular to an economic evaluation method and system for new energy storage in a market environment. Background Art

[0002] In the context of fully implementing the "dual carbon" strategic deployment and accelerating the construction of a new power system, as well as under the global carbon neutrality goal, clean energy will gradually replace fossil energy, and wind power and photovoltaic power generation will become the absolute main force of clean energy, with continued high installed capacity growth. However, new energy power generation has the problems of instability, randomness, and intermittency, which puts forward higher requirements for grid frequency control. As an important technology and basic equipment for building a new power system, energy storage plays an important role in ensuring stable power supply, improving system safety margin, and improving the utilization rate of new energy. There are many types of new energy storage technologies, mainly including electrochemical energy storage, mechanical energy storage and other energy storage. Among them, electrochemical energy storage is widely used due to the high energy density of lithium-ion batteries, and lithium iron phosphate batteries are particularly widely used in large-scale energy storage systems; mechanical energy storage uses the conversion between electrical energy and mechanical energy to realize the storage and output of electrical energy. Pumped storage is the most mature and widely used energy storage technology; in addition, there are other energy storage technologies such as hydrogen energy storage, heat storage / cold storage. However, in the existing technology, there is a lack of a method for comprehensive and effective evaluation of energy storage economy. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for evaluating the economic performance of a new type of energy storage in a market environment, aiming to solve the above-mentioned problems in the prior art.

[0004] The embodiment of the present invention provides an economic evaluation method for a new type of energy storage in a market environment, including:

[0005] Evaluate the multiple costs of new energy storage in the market environment;

[0006] Evaluate the multiple economic benefits of new energy storage systems in market environments; and

[0007] Evaluate the multiple economic evaluation indicators of new energy storage systems under market conditions.

[0008] The embodiment of the present invention provides an economic evaluation system for a new type of energy storage in a market environment, including:

[0009] Cost assessment module, used to evaluate the multi-dimensional costs of new energy storage in the market environment;

[0010] Benefit evaluation module, used to evaluate the multiple economic benefits of new energy storage systems under market conditions; and

[0011] The indicator evaluation module is used to evaluate the multiple economic evaluation indicators of new energy storage systems under the market environment.

[0012] An embodiment of the present invention also provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the method for economic evaluation of the new energy storage in the above-mentioned market environment are implemented.

[0013] An embodiment of the present invention further provides a computer-readable storage medium, on which a program for implementing information transmission is stored, and when the program is executed by a processor, the steps of the economic evaluation method of the new energy storage in the above-mentioned market environment are implemented.

[0014] The use of the embodiments of the present invention can include the following beneficial effects: the embodiments of the present invention comprehensively consider factors such as the initial investment cost, operation and maintenance cost, battery replacement cost, capital cost, charging cost, and residual value of fixed assets of the energy storage power station, and provide users with a scientific decision-making basis; at the same time, it also analyzes the economic benefits of the energy storage system, such as spot arbitrage, profit from participating in power auxiliary services, and capacity compensation, etc. Through scientific and reasonable evaluation methods and systems, it provides investors with a decision-making basis, optimizes resource allocation, and promotes the sustainable development of the new energy storage industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 is a flow chart of an economic evaluation method for a new type of energy storage in a market environment according to an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of an economic evaluation system for a new type of energy storage in a market environment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the following will be combined with the drawings in one or more embodiments of this specification to clearly and completely describe the technical solutions in one or more embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this document.

[0019] Method Embodiment

[0020] According to an embodiment of the present invention, a method for evaluating the economic performance of a new type of energy storage in a market environment is provided. Figure 1 is a flow chart of the economic evaluation method of the new energy storage in the market environment of the embodiment of the present invention, such as Figure 1 As shown, the economic evaluation method of the new energy storage in the market environment according to the embodiment of the present invention specifically includes:

[0021] Step S101, evaluating the multiple costs of new energy storage under the market environment, specifically including:

[0022] The initial investment cost of the energy storage power station is calculated by formula 1; determine whether the capacity operation and maintenance cost and power operation and maintenance cost of the energy storage power station are certain. If so, the total operation and maintenance cost of the energy storage power station is calculated by formula 2; if not, the total operation and maintenance cost of the energy storage power station is calculated by formula 3; based on the characteristic that the performance of energy storage batteries decreases with the increase in the number of uses, the battery replacement cost of the energy storage power station is calculated by formula 4; the capital cost and charging cost of the energy storage power station are calculated by formula 5 and formula 6 respectively; considering that when the energy storage power station reaches its life cycle, the residual value obtained by recovering the energy storage power station is used to offset part of the cost, and the residual value of the fixed assets of the energy storage power station is calculated by formula 7;

[0023] C inv =δ p P+δ E E formula 1;

[0024]

[0025]

[0026] Among them, δ P is the unit power cost, δ E represents the unit capacity cost, P represents the rated charging and discharging power of the energy storage station, and E represents the rated capacity of the energy storage station; δ P,OM is the annual operation and maintenance cost per unit power, δ E,OMis the annual operation and maintenance cost per unit capacity, N represents the full life cycle years, r represents the discount rate, μ represents the operation and maintenance cost coefficient of energy storage; τ represents the average annual reduction ratio of energy storage cost, t represents the battery replacement year, δ R The unit capacity replacement cost; Tax n represents the annual tax revenue of the energy storage power station, I n represents loan interest; P c is the charging electricity price, θ DOD is the charge and discharge depth of the energy storage battery, T n is the annual cycle number of the energy storage power station; γ represents the residual value rate;

[0027] Step S102, evaluating the multiple economic benefits of the new energy storage system under the market environment, specifically includes:

[0028] Comprehensively evaluate the spot arbitrage of energy storage power stations, profits from participating in power auxiliary services, and capacity compensation;

[0029] Step S103, evaluating the multiple economic evaluation indicators of the new energy storage system under the market environment, specifically including:

[0030] The investment payback period of the energy storage power station is calculated, wherein the investment payback period includes a static investment payback period and a dynamic investment payback period, and the expressions are shown in Formula 8 and Formula 9 respectively; the net present value of the energy storage power station is calculated by Formula 10; and the internal rate of return and benefit-cost ratio of the energy storage power station are calculated by Formula 11 and Formula 12 respectively;

[0031]

[0032]

[0033] Among them, P t represents the static investment payback period, T p represents the dynamic investment payback period; NPV represents the net present value, (CI-CO) t is the net cash flow in the tth year, CI is the cash inflow, CO is the cash outflow, i0 is the base discount rate; a and b are the discount rates, a>b, NPV a NPV is the net present value calculated when the discount rate is a. b is the net present value calculated when the discount rate is b.

[0034] The above technical solution of the embodiment of the present invention is described in detail below in combination with the specific situation of the economic evaluation method of the new energy storage under the market environment of the embodiment of the present invention.

[0035] In the market environment, the economic evaluation of new energy storage is crucial. The cost of energy storage power stations mainly includes initial investment cost, operation and maintenance cost, battery replacement cost, capital cost and charging cost. Among them, the initial investment cost includes the cost of energy storage system, power conversion cost and construction cost, while the operation and maintenance cost covers capacity operation and maintenance cost, power operation and maintenance cost and labor cost; in addition, considering that the performance of energy storage batteries gradually decreases with the increase of the number of times used, the cost of battery replacement is also a part that cannot be ignored; capital cost includes tax expenditure and loan interest; charging cost is closely related to factors such as electricity price, depth of charge and discharge of energy storage batteries and annual cycle number of energy storage power stations. When evaluating the economic benefits of energy storage power stations, it is necessary to consider multiple sources of income such as spot arbitrage, participation in power auxiliary services and capacity compensation. Among them, spot arbitrage is to create profit space by taking advantage of the high price difference between peaks and valleys in the electricity spot market, participating in power auxiliary services is to provide paid auxiliary services to the power grid to obtain corresponding income, and capacity compensation is a subsidy provided by the management agency to energy storage projects as a "bottom line" means of project income.

[0036] 1. Multi-dimensional energy storage cost analysis

[0037] (1) Initial investment cost of energy storage power station

[0038] The initial one-time investment cost of building an energy storage power station can be divided into energy storage capacity cost and power cost. The capacity cost is the cost generated when the energy storage power station provides energy, which is mainly composed of the battery body, integrated device and battery management system BMS; the power cost is the cost of the energy storage power station providing power, which is generally the energy storage inverter PCS, auxiliary facilities, etc.

[0039] C inv =δ p P+δ E E (1);

[0040] In the formula, δ P is the unit power cost, unit: yuan / kW; δ E It represents the unit capacity cost, unit: yuan / kWh; P represents the rated charging and discharging power of the energy storage station, unit: kW; E represents the rated capacity of the energy storage station, unit: kWh.

[0041] (2) Present value of total operation and maintenance cost of energy storage power station

[0042] The total operation and maintenance cost of energy storage power stations mainly includes capacity operation and maintenance cost, power operation and maintenance cost and labor cost. The sum of the present value of annual operation and maintenance cost of power and capacity is expressed as follows:

[0043]

[0044] In the formula, δ P,OMis the annual operation and maintenance cost per unit power, unit: yuan / kW; δ E,OM is the annual operation and maintenance cost per unit capacity, unit: Yuan / kWh; N represents the number of years in the entire life cycle, and r represents the discount rate.

[0045] If the annual operation and maintenance costs per unit power and capacity are difficult to determine, the total operation and maintenance costs of the energy storage power station can be estimated based on a certain proportion of the initial investment cost. The present value of the total operation and maintenance costs of the energy storage power station can be expressed as:

[0046]

[0047] Where μ represents the operation and maintenance cost coefficient of energy storage.

[0048] (3) Present value of energy storage station power replacement cost

[0049] Considering that the performance of energy storage batteries gradually decreases with the increase in the number of times they are used, when the performance of energy storage batteries is difficult to meet the requirements of energy storage power stations, replacing batteries in energy storage power stations can increase the service life of energy storage power stations, improve the investment utilization efficiency of energy storage power stations, and shorten the investment recovery period. However, the life of energy storage PCS and auxiliary equipment is relatively long and can be used for more than 20 years, so replacement is not considered. The present value of the cost of replacing batteries in energy storage power stations is expressed as follows:

[0050]

[0051] In the formula, τ is the average annual decline rate of energy storage cost; t is the year of battery replacement; δ R The unit capacity battery replacement cost, unit: Yuan / kWh.

[0052] (4) Present value of capital cost

[0053] Capital costs include tax expenditures, loan interest, etc. Tax expenditures include value-added tax, income tax, and sales tax surcharges, etc. The one-time investment in the construction of energy storage power stations is relatively large, with the proportion of self-owned funds ranging from 20% to 30%, and the rest being loans. The proportion of loans to total investment and loan interest also have a certain impact on the cost of energy storage power stations.

[0054]

[0055] In the formula, Tax n Represents the annual tax revenue of energy storage power station, unit: yuan; I n Represents loan interest, unit: Yuan.

[0056] (5) Present value of charging cost

[0057] In order to compare the cost per kilowatt-hour of different energy storage technologies, the embodiment of the present invention adopts a unified electricity price for calculation. According to the current situation, domestic energy storage power stations usually adopt a two-part electricity price strategy. The present value of the charging cost of the energy storage power station is expressed as:

[0058]

[0059] Where P c is the charging electricity price, unit: yuan; θ DOD is the charge and discharge depth of the energy storage battery, %; T n It is the annual cycle number of the energy storage power station.

[0060] (6) Present value of residual value of fixed assets of energy storage power station

[0061] Energy storage power stations will produce losses during the operation process, and the value of fixed assets will decrease. After the life cycle of the energy storage power station ends, the residual value obtained by recycling the energy storage power station can offset part of the cost. The residual value of the energy storage power station is related to the initial investment installation cost and the recycling system, which can be expressed as:

[0062]

[0063] In the formula, γ represents the residual value rate.

[0064] (7) Annual power generation of energy storage power stations

[0065]

[0066] In the formula, represents the system energy efficiency, %; η represents the average capacity decay rate of the battery, %.

[0067] 2. Economic Benefit Analysis of Multi-Energy Storage System

[0068] (1) Spot arbitrage

[0069] Spot arbitrage (electricity spot trading) is the key to improving the economic efficiency of energy storage power stations. In areas with electricity spot market transactions, independent energy storage power stations can participate in electricity spot market transactions, taking advantage of the high price difference between peaks and valleys in the electricity spot market, creating greater profit space.

[0070] (2) Profit from participating in power auxiliary services

[0071] Energy storage power stations accept the dispatch of the power grid and provide paid auxiliary services (peak shaving, frequency regulation) to the power grid in order to obtain corresponding benefits.

[0072] (3) Capacity compensation

[0073] Capacity compensation is a subsidy provided by the management agency to energy storage projects as a "bottom line" for project revenue. For example, after a province launched a spot market trial, it gave electrochemical energy storage capacity electricity prices in accordance with thermal power standards. Energy storage plays a similar role to backup thermal power in the system. There is a great deal of uncertainty in the utilization hours, and it is difficult to maintain economic efficiency by relying solely on the electricity price. Therefore, capacity electricity prices are needed to provide a "bottom line".

[0074] 3. Economic evaluation indicators of multi-energy storage systems

[0075] (1) Investment recovery period

[0076] The project investment payback period refers to the period of investment recovery, that is, the time required for the net cash income generated by the investment in the project to recover the initial investment. The shorter the investment payback period, the lower the investment risk.

[0077] Depending on whether the time value of funds is considered, it can be divided into static investment payback period and dynamic investment payback period. The specific calculation method is as follows:

[0078] Static payback period:

[0079]

[0080] Dynamic Payback Period:

[0081]

[0082] When using the payback period for evaluation, the payback period T is usually calculated. p With the standard payback period T b For comparison, only when T p ≤T b The project investment plan is reasonable.

[0083] (2) Net present value

[0084] Net present value (NPV) refers to the net cash flow of a project in each year during its life cycle (CI-CO). t , the sum of the present values ​​discounted at the beginning of the term according to a certain discount rate, the expression is:

[0085]

[0086] Where NPV is the net present value; (CI-CO) t is the net cash flow in year t, where CI is the cash inflow, CO is the cash outflow, and i0 represents the base discount rate.

[0087] (3) Internal rate of return

[0088] The internal rate of return is the discount rate at which the total present value of cash inflows equals the total present value of cash outflows and the net present value equals zero.

[0089]

[0090] Where a and b are discount rates, a>b; NPV a The net present value calculated when the discount rate is a, which must be a positive number; NPV bThe net present value calculated when the discount rate is b must be a negative value.

[0091] (4) Benefit-cost ratio

[0092] Defined as the monetary benefits of a project or course of action divided by its monetary costs.

[0093]

[0094] Where BCR is the benefit-cost ratio.

[0095] System Example

[0096] According to an embodiment of the present invention, a new type of energy storage economic evaluation system in a market environment is provided. Figure 2 Schematic diagram of the economic evaluation system of the new energy storage in the market environment of the embodiment of the present invention. Figure 2 As shown, the economic evaluation system of the new energy storage in the market environment according to the embodiment of the present invention specifically includes:

[0097] The cost evaluation module 20 is used to evaluate the multiple costs of new energy storage under the market environment, specifically for:

[0098] The initial investment cost of the energy storage power station is calculated by formula 1; determine whether the capacity operation and maintenance cost and power operation and maintenance cost of the energy storage power station are certain. If so, the total operation and maintenance cost of the energy storage power station is calculated by formula 2; if not, the total operation and maintenance cost of the energy storage power station is calculated by formula 3; based on the characteristic that the performance of energy storage batteries decreases with the increase in the number of uses, the battery replacement cost of the energy storage power station is calculated by formula 4; the capital cost and charging cost of the energy storage power station are calculated by formula 5 and formula 6 respectively; considering that when the energy storage power station reaches its life cycle, the residual value obtained by recovering the energy storage power station is used to offset part of the cost, and the residual value of the fixed assets of the energy storage power station is calculated by formula 7;

[0099] C inv =δ p P+δ E E formula 1;

[0100]

[0101] Among them, δ P is the unit power cost, δ E represents the unit capacity cost, P represents the rated charging and discharging power of the energy storage station, and E represents the rated capacity of the energy storage station; δ P,OM is the annual operation and maintenance cost per unit power, δ E,OM is the annual operation and maintenance cost per unit capacity, N represents the full life cycle years, r represents the discount rate, μ represents the operation and maintenance cost coefficient of energy storage; τ represents the average annual reduction ratio of energy storage cost, t represents the battery replacement year, δR The unit capacity replacement cost; Tax n represents the annual tax revenue of the energy storage power station, I n represents loan interest; P c is the charging electricity price, θ DOD is the charge and discharge depth of the energy storage battery, T n is the annual cycle number of the energy storage power station; γ represents the residual value rate;

[0102] The benefit evaluation module 22 is used to evaluate the multiple economic benefits of the new energy storage system under the market environment, specifically for:

[0103] Comprehensively evaluate the spot arbitrage of energy storage power stations, profits from participating in power auxiliary services, and capacity compensation;

[0104] The indicator evaluation module 24 is used to evaluate the multiple economic evaluation indicators of the new energy storage system under the market environment, specifically for:

[0105] The investment payback period of the energy storage power station is calculated, wherein the investment payback period includes a static investment payback period and a dynamic investment payback period, and the expressions are shown in Formula 8 and Formula 9 respectively; the net present value of the energy storage power station is calculated by Formula 10; and the internal rate of return and benefit-cost ratio of the energy storage power station are calculated by Formula 11 and Formula 12 respectively;

[0106]

[0107] Among them, P t represents the static investment payback period, T p represents the dynamic investment payback period; NPV represents the net present value, (CI-CO) t is the net cash flow in the tth year, CI is the cash inflow, CO is the cash outflow, i0 represents the base discount rate; a and b are the discount rates, a>b, NPV a NPV is the net present value calculated when the discount rate is a. b is the net present value calculated when the discount rate is b.

[0108] The embodiment of the present invention is a system embodiment corresponding to the above-mentioned method embodiment. The specific operations of each module can be understood by referring to the description of the method embodiment, which will not be repeated here.

[0109] In summary, the embodiment of the present invention comprehensively considers factors such as the initial investment cost, operation and maintenance cost, battery replacement cost, capital cost, charging cost, and residual value of fixed assets of the energy storage power station, providing users with a scientific decision-making basis; at the same time, the model also analyzes the economic benefits of the energy storage system, such as spot arbitrage, profit from participating in power auxiliary services, and capacity compensation, etc. Through scientific and reasonable evaluation models and methods, it provides investors with a decision-making basis, optimizes resource allocation, and promotes the sustainable development of the energy storage industry.

[0110] Device Example 1

[0111] An embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps described in the method embodiment when executed by the processor.

[0112] Device Example 2

[0113] An embodiment of the present invention provides a computer-readable storage medium, on which a program for implementing information transmission is stored. When the program is executed by a processor, the steps described in the method embodiment are implemented.

[0114] The computer-readable storage medium in this embodiment includes, but is not limited to, ROM, RAM, magnetic disk or optical disk, etc.

[0115] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating the economic performance of new energy storage in a market environment, characterized in that include: Evaluate the multiple costs of new energy storage in the market environment; Evaluate the multiple economic benefits of new energy storage systems in market environments; as well as Evaluate the multiple economic evaluation indicators of new energy storage systems under market conditions.

2. The method according to claim 1, characterized in that The evaluation of the multiple costs of new energy storage in the market environment specifically includes: The initial investment cost of the energy storage power station is calculated by formula 1; determine whether the capacity operation and maintenance cost and power operation and maintenance cost of the energy storage power station are certain. If so, the total operation and maintenance cost of the energy storage power station is calculated by formula 2; if not, the total operation and maintenance cost of the energy storage power station is calculated by formula 3; based on the characteristic that the performance of energy storage batteries decreases with the increase in the number of uses, the battery replacement cost of the energy storage power station is calculated by formula 4; the capital cost and charging cost of the energy storage power station are calculated by formula 5 and formula 6 respectively; considering that when the energy storage power station reaches its life cycle, the residual value obtained by recovering the energy storage power station is used to offset part of the cost, and the residual value of the fixed assets of the energy storage power station is calculated by formula 7; C inv = δ p P + δ E E Equation 1; Among them, δ P is the unit power cost, δ E represents the unit capacity cost, P represents the rated charging and discharging power of the energy storage station, and E represents the rated capacity of the energy storage station; δ P,OM is the annual operation and maintenance cost per unit power, δ E,OM is the annual operation and maintenance cost per unit capacity, N represents the full life cycle years, r represents the discount rate, μ represents the operation and maintenance cost coefficient of energy storage; τ represents the average annual reduction ratio of energy storage cost, t represents the battery replacement year, δ R The unit capacity replacement cost; Tax n represents the annual tax revenue of the energy storage power station, I n represents loan interest; P c is the charging electricity price, θ DOD is the charge and discharge depth of the energy storage battery, T n is the annual cycle number of the energy storage power station; γ represents the residual value rate.

3. The method according to claim 1, characterized in that The evaluation of the multiple economic benefits of new energy storage systems under market conditions specifically includes: Comprehensive assessment of spot arbitrage, profits from participating in power ancillary services and capacity compensation of energy storage power stations.

4. The method according to claim 1, characterized in that: The evaluation of multiple economic evaluation indicators of new energy storage systems under market conditions specifically includes: The investment payback period of the energy storage power station is calculated, wherein the investment payback period includes a static investment payback period and a dynamic investment payback period, and the expressions are shown in Formula 8 and Formula 9 respectively; the net present value of the energy storage power station is calculated by Formula 10; and the internal rate of return and benefit-cost ratio of the energy storage power station are calculated by Formula 11 and Formula 12 respectively; Among them, P t represents the static investment payback period, T p represents the dynamic investment payback period; NPV represents the net present value, (CI-CO) t is the net cash flow in the tth year, CI is the cash inflow, CO is the cash outflow, i0 is the base discount rate; a and b are the discount rates, a>b, NPV a NPV is the net present value calculated when the discount rate is a. b is the net present value calculated when the discount rate is b.

5. An economic evaluation system for new energy storage in a market environment, characterized by include: Cost assessment module, used to evaluate the multi-dimensional costs of new energy storage in the market environment; Benefit evaluation module, used to evaluate the multiple economic benefits of new energy storage systems under market conditions; as well as The indicator evaluation module is used to evaluate the multiple economic evaluation indicators of new energy storage systems under the market environment.

6. The system according to claim 5, characterized in that The cost assessment module is specifically used for: The initial investment cost of the energy storage power station is calculated by formula 1; determine whether the capacity operation and maintenance cost and power operation and maintenance cost of the energy storage power station are certain. If so, the total operation and maintenance cost of the energy storage power station is calculated by formula 2; if not, the total operation and maintenance cost of the energy storage power station is calculated by formula 3; based on the characteristic that the performance of energy storage batteries decreases with the increase in the number of uses, the battery replacement cost of the energy storage power station is calculated by formula 4; the capital cost and charging cost of the energy storage power station are calculated by formula 5 and formula 6 respectively; considering that when the energy storage power station reaches its life cycle, the residual value obtained by recovering the energy storage power station is used to offset part of the cost, and the residual value of the fixed assets of the energy storage power station is calculated by formula 7; C inv = δ p P + δ E Equation 1 of E; Among them, δ P is the unit power cost, δ E represents the unit capacity cost, P represents the rated charging and discharging power of the energy storage station, and E represents the rated capacity of the energy storage station; δ P,OM is the annual operation and maintenance cost per unit power, δ E,OM is the annual operation and maintenance cost per unit capacity, N represents the full life cycle years, r represents the discount rate, μ represents the operation and maintenance cost coefficient of energy storage; τ represents the average annual reduction ratio of energy storage cost, t represents the battery replacement year, δ R The unit capacity replacement cost; Tax n represents the annual tax revenue of the energy storage power station, I n represents loan interest; P c is the charging electricity price, θ DOD is the charge and discharge depth of the energy storage battery, T n is the annual cycle number of the energy storage power station; γ represents the residual value rate.

7. The system according to claim 5, characterized in that The benefit evaluation module is specifically used for: Comprehensive assessment of spot arbitrage, profits from participating in power ancillary services and capacity compensation of energy storage power stations.

8. The system according to claim 5, characterized in that The indicator evaluation module is specifically used for: The investment payback period of the energy storage power station is calculated, wherein the investment payback period includes a static investment payback period and a dynamic investment payback period, and the expressions are shown in Formula 8 and Formula 9 respectively; the net present value of the energy storage power station is calculated by Formula 10; and the internal rate of return and benefit-cost ratio of the energy storage power station are calculated by Formula 11 and Formula 12 respectively; Among them, P t represents the static investment payback period, T p represents the dynamic investment payback period; NPV represents the net present value, (CI-CO) t is the net cash flow in the tth year, CI is the cash inflow, CO is the cash outflow, i0 is the base discount rate; a and b are the discount rates, a>b, NPV a NPV is the net present value calculated when the discount rate is a. b is the net present value calculated when the discount rate is b.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method for economic evaluation of a new type of energy storage in a market environment as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores an implementation program for information transmission, and when the program is executed by the processor, the steps of the economic evaluation method for a new energy storage in a market environment as described in any one of claims 1-4 are implemented.

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