Gravity energy storage low-carbon scheduling method and system based on electric power capacity market

Abstract

The invention discloses a gravity energy storage low-carbon scheduling method and system based on an electric power capacity market. The method comprises the following steps: acquiring gravity energy storage low-carbon scheduling data; constructing a gravity energy storage operation characteristic model based on the power market capacity; a gravity energy storage low-carbon dispatching model is constructed, gravity energy storage is charged when carbon emission of kilowatt-hour electricity is low and discharged when carbon emission of kilowatt-hour electricity is high according to a kilowatt-hour electricity carbon emission curve issued by a power grid, and the purpose of reducing carbon emission is achieved; a gravity energy storage power capacity market compensation model and a gravity energy storage carbon transaction model are constructed, and power capacity market compensation and carbon transaction settlement are performed on gravity energy storage, so that the enthusiasm of the gravity energy storage in participating in the power capacity market and carbon emission reduction is improved. According to the invention, the low-carbon scheduling of the gravity energy storage is realized, the carbon emission is reduced, and the enthusiasm of the gravity energy storage to participate in the power capacity market and the low-carbon scheduling is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system regulation and control, and in particular to a gravity energy storage low-carbon dispatching method and system based on a power capacity market. Background Art

[0002] In the power capacity market, the low-carbon dispatch of gravity energy storage can not only effectively reduce the carbon emissions of the power grid, but also improve the utilization rate of renewable energy and enhance the flexibility and stability of the power system. This has far-reaching significance for achieving the low-carbon transformation of the power system, and at the same time provides a more environmentally friendly and economical solution for the power capacity market. The existing methods have the following shortcomings: 1) Lack of consideration of the impact of the power capacity market. The introduction of the power capacity market will affect the operation strategy and regulation capacity of gravity energy storage. The power capacity market requires the energy storage system to provide power support during specific periods, which may conflict with the traditional gravity energy storage dispatching strategy (such as storage at low electricity prices and release at high electricity prices); the existing methods usually do not fully consider the needs of the capacity market, resulting in a mismatch between the dispatching strategy of gravity energy storage and market requirements; resulting in the inability of the energy storage system to charge and discharge at the best time, reducing the economy and dispatching flexibility of the energy storage system. 2) Lack of low-carbon dispatching methods in the context of the power capacity market. The traditional gravity energy storage dispatching method mainly focuses on electricity price fluctuations and power supply stability, but in the context of the power capacity market, the energy storage system needs to provide reliable capacity support for the power grid during specific periods. This demand has put forward new requirements for the low-carbon dispatch of gravity energy storage, but the existing methods have not fully adapted to these requirements. The lack of low-carbon dispatch algorithms designed for the power capacity market has led to poor performance of energy storage systems in the power capacity market, and the inability to fully realize their potential for low-carbon dispatch, thus failing to maximize the carbon emission reduction effect. 3) Lack of power capacity market compensation and carbon trading models for gravity energy storage. In the power capacity market, energy storage systems provide regulation capacity for the power grid, but existing methods lack corresponding compensation mechanisms and carbon trading models; existing models usually only consider basic economic returns, but fail to provide appropriate economic compensation and quantitative assessment of carbon emissions for the contribution of energy storage systems in the power capacity market. Gravity energy storage systems may face economic disadvantages when providing power regulation services. In addition, the lack of a carbon trading model also makes it difficult for energy storage systems to obtain economic benefits from carbon emission reduction, which may limit the application and promotion of energy storage systems in low-carbon dispatch. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a low-carbon scheduling method and system for gravity energy storage based on the electricity capacity market, which takes the electricity capacity market into consideration, obtains more accurate gravity energy storage operation characteristics, realizes low-carbon scheduling of gravity energy storage, and reduces carbon emissions.

[0004] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0005] A low-carbon dispatching method for gravity energy storage based on the power capacity market of the present invention comprises the following operations:

[0006] Collect low-carbon dispatch data of gravity energy storage, including gravity energy storage operation data, power capacity market data, and carbon emission factor data;

[0007] According to the energy conversion mechanism and low-carbon dispatch data of gravity energy storage, a gravity energy storage operation characteristic model based on electricity market capacity is constructed, and the gravity energy storage operation characteristic model is used to describe the gravity energy storage operation characteristics when considering the electricity capacity market;

[0008] Based on the operation characteristics of gravity energy storage when considering the power capacity market, a low-carbon dispatch model of gravity energy storage is constructed, and low-carbon dispatch is performed using the low-carbon dispatch model of gravity energy storage;

[0009] Construct a power capacity market compensation model for gravity energy storage and a carbon trading model for gravity energy storage. According to the low-carbon scheduling results, calculate the carbon emission reduction of gravity energy storage during the scheduling cycle, and conduct carbon trading settlement to achieve low-carbon scheduling.

[0010] A further improvement of the present invention is that the expression of low-carbon dispatching data of gravity energy storage is:

[0011] X(t)=[m,h,k,η,P F (t),P C (t),δ F ,δ C ,λ(t)]

[0012] Among them, X(t) is the collected low-carbon dispatch data of gravity energy storage, m is the total mass of gravity energy storage, h is the height of gravity energy storage system, k is the initial height coefficient of weight block, η is the efficiency of converting gravitational potential energy into electrical energy, P F (t) is the gravity energy storage discharge power, P C (t) is the gravity energy storage charging power, δ F The charging market capacity reserved for gravity energy storage, δ C is the discharge market capacity reserved for gravity energy storage, and λ(t) is the carbon emission curve of the power grid.

[0013] A further improvement of the present invention is to construct a gravity energy storage operation characteristic model based on the power market capacity according to the energy conversion mechanism and the low-carbon dispatch data of gravity energy storage, which specifically includes:

[0014] The energy conversion mechanism is the mechanism of converting gravitational potential energy into electrical energy, and the expression is:

[0015]

[0016] Among them, P(t) is the electric power converted from gravitational potential energy by gravitational energy storage, E is gravitational potential energy, g is gravitational acceleration, t is time, and v is the speed of the weight block;

[0017] The gravity energy storage operation characteristic model based on the power market capacity includes the gravity energy storage discharge operation characteristic model and the gravity energy storage charging operation characteristic model;

[0018] The expression of the gravity energy storage discharge operation characteristic model is:

[0019] P F (t) = ηmgv1

[0020] S F =S F1 =ηmgh·k-δ F -P F (t)·Δt1

[0021] S C =S C1 =ηmgh·(1-k)-δ C +P F (t)·Δt1

[0022] δ F =ηmgh1

[0023] δ C =ηmgh2

[0024]

[0025] Where v1 is the speed of the heavy object during discharge, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 The remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, h1 is the height of the weight block corresponding to the discharge, h2 is the height of the weight block corresponding to the charge, and Δt1 is the discharge time of the gravity energy storage;

[0026] The expression of the gravity energy storage charging operation characteristic model is:

[0027] P C (t) = ηmgv2

[0028] S F =S F2 =ηmgh·k-δ F +P C (t)·Δt2

[0029] S C =S C2 =ηmgh·(1-k)-δ C -P C (t)·Δt2

[0030]

[0031] Where v2 is the speed of the heavy object during charging, S F2 is the remaining dischargeable capacity of the gravity energy storage after charging considering the power market capacity, S C2 The remaining rechargeable capacity after the gravity energy storage is charged to take into account the power market capacity, and Δt2 is the charging time of the gravity energy storage.

[0032] A further improvement of the present invention is that the expression of the low-carbon scheduling model of gravity energy storage is:

[0033]

[0034] S F >0

[0035] S C >0

[0036]

[0037]

[0038]

[0039]

[0040] Among them, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 is the remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, S F2 is the remaining dischargeable capacity of the gravity energy storage after charging considering the power market capacity, S C2 is the remaining rechargeable capacity after the gravity energy storage is charged considering the power market capacity, P F (t) is the gravity energy storage discharge power, P C(t) is the charging power of gravity energy storage, λ(t) is the carbon emission curve per kilowatt-hour, η is the efficiency of converting gravitational potential energy into electrical energy, m is the total mass of gravity energy storage, g is the gravitational acceleration, h is the height of gravity energy storage system, and k is the initial height coefficient of the weight block.

[0041] A further improvement of the present invention is that the expressions of the constructed power capacity market compensation model of gravity energy storage and the gravity energy storage carbon trading model are:

[0042] Y shic =δ C ψ C +δ F ψ F

[0043] Among them, Y shic is the power market capacity compensation for gravity energy storage, ψ C is the market compensation price for the charging capacity of gravity energy storage, δ C The charging market capacity reserved for gravity energy storage, δ F The discharge market capacity reserved for gravity energy storage, ψ F Market compensation prices for the discharge capacity of gravity energy storage;

[0044]

[0045] Among them, Y CO2 Carbon trading revenue for gravity energy storage, is the carbon trading price, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, P C (t) is the gravity energy storage charging power, P F (t) is the discharge power of gravity energy storage, and λ(t) is the carbon emission curve per kilowatt-hour.

[0046] The present invention provides a gravity energy storage low-carbon dispatching system based on the power capacity market, the system comprising:

[0047] The collection module is used to collect low-carbon dispatch data of gravity energy storage, including gravity energy storage operation data, power capacity market data, and carbon emission factor data;

[0048] A gravity energy storage operation characteristic model construction module is used to construct a gravity energy storage operation characteristic model based on the power market capacity according to the energy conversion mechanism and the gravity energy storage low-carbon dispatch data, and use the gravity energy storage operation characteristic model to describe the gravity energy storage operation characteristics when considering the power capacity market;

[0049] A low-carbon dispatch model building module is used to build a low-carbon dispatch model for gravity energy storage based on the gravity energy storage operation characteristics when considering the power capacity market, and use the gravity energy storage low-carbon dispatch model to perform low-carbon dispatch;

[0050] The dispatching and settlement module is used to construct the electricity capacity market compensation model and the gravity energy storage carbon trading model for gravity energy storage. According to the low-carbon dispatching results, it calculates the carbon emission reduction of gravity energy storage during the dispatching period, and conducts carbon trading settlement to achieve low-carbon dispatching.

[0051] A further improvement of the present invention is that the expression of low-carbon dispatching data of gravity energy storage is:

[0052] X(t)=[m,h,k,η,P F (t),P C (t),δ F ,δ C ,λ(t)]

[0053] Among them, X(t) is the collected low-carbon dispatch data of gravity energy storage, m is the total mass of gravity energy storage, h is the height of gravity energy storage system, k is the initial height coefficient of weight block, η is the efficiency of converting gravitational potential energy into electrical energy, P F (t) is the gravity energy storage discharge power, P C (t) is the gravity energy storage charging power, δ F The charging market capacity reserved for gravity energy storage, δ C is the discharge market capacity reserved for gravity energy storage, and λ(t) is the carbon emission curve of the power grid.

[0054] A further improvement of the present invention is to construct a gravity energy storage operation characteristic model based on the power market capacity according to the energy conversion mechanism and the low-carbon dispatch data of gravity energy storage, which specifically includes:

[0055] The energy conversion mechanism is the conversion of gravitational potential energy into electrical energy, and the expression is:

[0056]

[0057] Among them, P(t) is the electric power converted from gravitational potential energy by gravitational energy storage, E is gravitational potential energy, g is gravitational acceleration, t is time, and v is the speed of the weight block;

[0058] The gravity energy storage operation characteristic model based on the power market capacity includes the gravity energy storage discharge operation characteristic model and the gravity energy storage charging operation characteristic model;

[0059] The expression of the gravity energy storage discharge operation characteristic model is:

[0060] P F (t) = ηmgv1

[0061] S F =S F1 =ηmgh·k-δ F -P F (t)·Δt1

[0062] S C =S C1 =ηmgh·(1-k)-δ C +P F (t)·Δt1

[0063] δ F =ηmgh1

[0064] δ C =ηmgh2

[0065]

[0066] Where v1 is the speed of the heavy object during discharge, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 The remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, h1 is the height of the weight block corresponding to the discharge, h2 is the height of the weight block corresponding to the charge, and Δt1 is the discharge time of the gravity energy storage;

[0067] The expression of the gravity energy storage charging operation characteristic model is:

[0068] P C (t) = ηmgv2

[0069] S F =S F2 =ηmgh·k-δ F +P C (t)·Δt2

[0070] S C =S C2 =ηmgh·(1-k)-δ C -P C (t)·Δt2

[0071]

[0072] Where v2 is the speed of the heavy object during charging, S F2 is the remaining dischargeable capacity of the gravity energy storage after charging considering the power market capacity, S C2The remaining rechargeable capacity after the gravity energy storage is charged to take into account the power market capacity, and Δt2 is the charging time of the gravity energy storage.

[0073] A further improvement of the present invention is that the expression of the low-carbon scheduling model of gravity energy storage is:

[0074]

[0075] S F >0

[0076] S C >0

[0077]

[0078]

[0079]

[0080]

[0081] Among them, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 is the remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, S F2 is the remaining dischargeable capacity of the gravity energy storage after charging considering the power market capacity, S C2 is the remaining rechargeable capacity after the gravity energy storage is charged considering the power market capacity, P F (t) is the gravity energy storage discharge power, P C (t) is the charging power of gravity energy storage, λ(t) is the carbon emission curve per kilowatt-hour, η is the efficiency of converting gravitational potential energy into electrical energy, m is the total mass of gravity energy storage, g is the gravitational acceleration, h is the height of gravity energy storage system, and k is the initial height coefficient of the weight block.

[0082] A further improvement of the present invention is that the expressions of the constructed power capacity market compensation model of gravity energy storage and the gravity energy storage carbon trading model are:

[0083] Y shic =δ C ψ C +δ F ψ F

[0084] Among them, Y shic is the power market capacity compensation for gravity energy storage, ψ C is the market compensation price for the charging capacity of gravity energy storage, δ C The charging market capacity reserved for gravity energy storage, δ F The discharge market capacity reserved for gravity energy storage, ψ F Market compensation prices for the discharge capacity of gravity energy storage;

[0085]

[0086] Among them, Y CO2 Carbon trading revenue for gravity energy storage, is the carbon trading price, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, P C (t) is the gravity energy storage charging power, P F (t) is the discharge power of gravity energy storage, and λ(t) is the carbon emission curve per kilowatt-hour.

[0087] The beneficial effects of the present invention are as follows: the present invention takes into account the power capacity market, can obtain more accurate gravity energy storage operation characteristics, realizes low-carbon dispatch of gravity energy storage, and reduces carbon emissions. The present invention also provides power capacity market compensation and carbon emission reduction compensation, which enhances the enthusiasm of gravity energy storage to participate in low-carbon dispatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 is a flow chart of a method in an embodiment of the present invention. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0090] like Figure 1 As shown, a gravity energy storage low-carbon scheduling method based on the power capacity market of this embodiment includes the following steps:

[0091] Step 1: Collect low-carbon dispatch data of gravity energy storage, including gravity energy storage operation data, power capacity market data, and carbon emission factor data. Gravity energy storage operation data include the total mass of gravity energy storage, the height of gravity energy storage system, the initial height of weight block, and the efficiency of converting gravitational potential energy into electrical energy. Power capacity market data include discharge power, charging power, charging market capacity, and discharge market capacity. The collected low-carbon dispatch data of gravity energy storage is shown in expression (1):

[0092] X(t)=[m,h,k,η,P F (t),P C (t),δ F ,δ C ,λ(t)] (1)

[0093] Among them, X(t) is the collected low-carbon dispatch data of gravity energy storage, m is the total mass of gravity energy storage, h is the height of gravity energy storage system, k is the initial height coefficient of weight block, η is the efficiency of converting gravitational potential energy into electrical energy, P F (t) is the gravity energy storage discharge power, P C (t) is the gravity energy storage charging power, δ F The charging market capacity reserved for gravity energy storage, δ C is the discharge market capacity reserved for gravity energy storage, and λ(t) is the carbon emission curve of the power grid.

[0094] Step 2, construct a gravity energy storage operation characteristic model based on the power market capacity. The basic principle of gravity energy storage is: when charging, the electrical energy is converted into mechanical energy, and then the mechanical energy is converted into gravitational potential energy to achieve electricity storage. When discharging, the gravitational potential energy is converted into mechanical energy, and then converted into electrical energy to achieve electricity release. The new power system is based on new energy, and the power supply side regulation capability is reduced. In order to ensure the stable operation of the new power system, part of the capacity is reserved for grid regulation through capacity compensation. This embodiment provides part of the power market capacity for the new power system through gravity energy storage, including charging market capacity and discharging market capacity. The gravity energy storage operation characteristic model based on the power market capacity is used to describe the gravity energy storage power storage and release process when considering the power capacity market.

[0095] Step 3, a low-carbon dispatch model of gravity energy storage considering the power market capacity is proposed. According to the carbon emission curve per kilowatt-hour published by the power grid, gravity energy storage chooses to charge when the carbon emission per kilowatt-hour is low and discharge when the carbon emission per kilowatt-hour is high, so as to promote the consumption of electricity with low carbon emission content and reduce the consumption of electricity with high carbon emission content, thereby achieving the purpose of reducing carbon emissions. In low-carbon dispatch, it is necessary to consider the capacity constraints of the power market, and low-carbon dispatch shall not exceed the charging and discharging capacity of gravity energy storage.

[0096] Step 4: Construct a power capacity market compensation model and a gravity energy storage carbon trading model for gravity energy storage. First, construct a power capacity market compensation model for gravity energy storage. According to the reserved power market charging capacity and power market discharge capacity, gravity energy storage is compensated in the power capacity market to enhance the enthusiasm of gravity energy storage to participate in the power capacity market. Secondly, construct a gravity energy storage carbon trading model. According to the low-carbon scheduling results in step 3, calculate the carbon emission reduction of gravity energy storage during the scheduling period, and conduct carbon trading settlement.

[0097] In step 2, the mechanism of converting gravitational potential energy into electrical energy is expressed as:

[0098]

[0099] Among them, P(t) is the electric power converted from gravitational potential energy by gravitational energy storage, E is gravitational potential energy, g is gravitational acceleration, t is time, and v is the speed of the weight block;

[0100] According to the energy conversion mechanism shown in expression (2), a gravity energy storage operation characteristic model based on the power market capacity is constructed, including a gravity energy storage discharge operation characteristic model and a gravity energy storage charging operation characteristic model. The gravity energy storage discharge operation characteristic model is shown in expressions (3) to (8). Expression (3) is the discharge power of gravity energy storage. Expression (4) is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. After considering the power market capacity, the dischargeable capacity of the gravity energy storage system is reduced. Expression (5) is the chargeable capacity after the gravity energy storage is discharged considering the power market capacity. After considering the power market capacity, the chargeable capacity of the gravity energy storage system is reduced. Expression (6) is the power market discharge capacity reserved for the new power system. Expression (7) is the power market charging capacity reserved for the new power system. Expression (8) is the discharge duration constraint.

[0101] P F (t) = ηmgv1(3)

[0102] S F =S F1 =ηmgh·k-δ F -P F (t)·Δt1(4)

[0103] S C =S C1 =ηmgh·(1-k)-δ C +P F (t)·Δt1(5)

[0104] δ F =ηmgh1(6)

[0105] δ C=ηmgh2(7)

[0106]

[0107] Where v1 is the speed of the heavy object during discharge, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 In order to consider the remaining rechargeable capacity of the gravity energy storage after discharge of the power market capacity, h1 is the height of the weight block corresponding to the discharge, h2 is the height of the weight block corresponding to the charge, and Δt1 is the discharge time of the gravity energy storage.

[0108] The discharge operation characteristic model of the gravity energy storage is shown in expressions (9) to (12). Expression (9) is the charging power of the gravity energy storage. Expression (10) is the remaining dischargeable capacity after the gravity energy storage is charged considering the power market capacity. After considering the power market capacity, the discharge capacity of the gravity energy storage is reduced. Expression (11) is the rechargeable capacity after the gravity energy storage is charged considering the power market capacity. After considering the power market capacity, the charging capacity of the gravity energy storage is reduced. Expression (12) is the charging time constraint.

[0109] P C (t) = ηmgv2 (9)

[0110] S F =S F2 =ηmgh·k-δ F +P C (t)·Δt2(10)

[0111] S C =S C2 =ηmgh·(1-k)-δ C -P C (t)·Δt2(11)

[0112]

[0113] Where v2 is the speed of the heavy object during charging, S F2 is the remaining dischargeable capacity of the gravity energy storage after charging considering the power market capacity, S C2 The remaining rechargeable capacity after the gravity energy storage is charged to take into account the power market capacity, and Δt2 is the charging time of the gravity energy storage.

[0114] In step 3, the low-carbon dispatch model of gravity energy storage is shown in expressions (13) to (19). Expression (13) is the objective function of the low-carbon dispatch model of gravity energy storage considering the capacity of the electricity market. It takes the minimum carbon emission charged into the system during charging, and chooses to discharge when the carbon emission per kilowatt-hour is high during discharge, so as to promote the consumption of electricity with low carbon emission content and reduce the consumption of electricity with high carbon emission content, thereby achieving the purpose of reducing carbon emissions. Expression (14) and expression (15) are the discharge capacity constraint and charging capacity constraint of gravity energy storage in low-carbon dispatch, respectively. That is, during the charging and discharging process, it is necessary to ensure that the charging capacity and the discharging capacity are both greater than 0. Expression (16) and expression (17) are the calculation models of the discharge capacity and the charging capacity during the discharge process. Expression (18) and expression (19) are the calculation models of the discharge capacity and the charging capacity during the charging process.

[0115]

[0116] S F >0(14)

[0117] S C >0(15)

[0118]

[0119] Among them, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 They are the start and end time of gravity energy storage charging respectively.

[0120] In step 4, the power capacity market compensation model of gravity energy storage is shown in expression (20), which is mainly calculated based on the power charging capacity and discharge capacity. The gravity energy storage carbon trading model is shown in expression (21).

[0121]

[0122] Among them, Y shic is the power market capacity compensation for gravity energy storage, ψ C is the market compensation price for the charging capacity of gravity energy storage, ψ F is the market compensation price for the discharge capacity of gravity energy storage, Y CO2 Carbon trading revenue for gravity energy storage, The carbon trading price.

[0123] Through the above operation steps of this embodiment, low-carbon scheduling of gravity energy storage can be achieved in the electricity capacity market.

[0124] The above method is implemented through a gravity energy storage low-carbon dispatching system based on the electricity capacity market, which includes:

[0125] The collection module is used to collect low-carbon dispatch data of gravity energy storage, including gravity energy storage operation data, power capacity market data, and carbon emission factor data;

[0126] A gravity energy storage operation characteristic model construction module is used to construct a gravity energy storage operation characteristic model based on the power market capacity according to the energy conversion mechanism and the gravity energy storage low-carbon dispatch data, and use the gravity energy storage operation characteristic model to describe the gravity energy storage operation characteristics when considering the power capacity market;

[0127] A low-carbon dispatch model building module is used to build a low-carbon dispatch model for gravity energy storage based on the gravity energy storage operation characteristics when considering the power capacity market, and use the gravity energy storage low-carbon dispatch model to perform low-carbon dispatch;

[0128] The dispatching and settlement module is used to construct the electricity capacity market compensation model and the gravity energy storage carbon trading model for gravity energy storage. According to the low-carbon dispatching results, it calculates the carbon emission reduction of gravity energy storage during the dispatching period, and conducts carbon trading settlement to achieve low-carbon dispatching.

[0129] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined similarly here.

[0130] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-carbon dispatching method for gravity energy storage based on the power capacity market, characterized by: The following operations are included: Collect low-carbon dispatch data of gravity energy storage, including gravity energy storage operation data, power capacity market data, and carbon emission factor data; According to the energy conversion mechanism and low-carbon dispatch data of gravity energy storage, a gravity energy storage operation characteristic model based on electricity market capacity is constructed, and the gravity energy storage operation characteristic model is used to describe the gravity energy storage operation characteristics when considering the electricity capacity market; Based on the operation characteristics of gravity energy storage when considering the power capacity market, a low-carbon dispatch model of gravity energy storage is constructed, and low-carbon dispatch is performed using the low-carbon dispatch model of gravity energy storage; Construct a power capacity market compensation model for gravity energy storage and a carbon trading model for gravity energy storage. According to the low-carbon scheduling results, calculate the carbon emission reduction of gravity energy storage during the scheduling cycle, and conduct carbon trading settlement to achieve low-carbon scheduling.

2. According to claim 1, a gravity energy storage low-carbon scheduling method based on the power capacity market is characterized by: The expression of the low-carbon dispatch data of gravity energy storage is: X(t)=[m,h,k,η,P F (t),P C (t),δ F ,d C ,λ(t)] Among them, X(t) is the collected low-carbon dispatch data of gravity energy storage, m is the total mass of gravity energy storage, h is the height of gravity energy storage system, k is the initial height coefficient of weight block, η is the efficiency of converting gravitational potential energy into electrical energy, P F (t) is the gravity energy storage discharge power, P C (t) is the gravity energy storage charging power, δ F The charging market capacity reserved for gravity energy storage, δ C is the discharge market capacity reserved for gravity energy storage, and λ(t) is the carbon emission curve of the power grid.

3. A low-carbon dispatching method for gravity energy storage based on the power capacity market according to claim 2, characterized in that: According to the energy conversion mechanism and low-carbon dispatch data of gravity energy storage, a gravity energy storage operation characteristic model based on the power market capacity is constructed, which specifically includes: The energy conversion mechanism is the mechanism of converting gravitational potential energy into electrical energy, and the expression is: Where P(t) is the electrical power converted from gravitational potential energy by gravitational energy storage, E is gravitational potential energy, g is gravitational acceleration, t is time, and v is the speed of the weight; The gravity energy storage operation characteristic model based on the power market capacity includes the gravity energy storage discharge operation characteristic model and the gravity energy storage charging operation characteristic model; The expression of the gravity energy storage discharge operation characteristic model is: P F (t)=ηmgv1 S F =S F1 =ηmgh·k-δ F -P F (t)·Δt1 S C =S C1 =ηmgh·(1-k)-δ C +P F (t)·Δt1 d F =ηmgh1 d C =ηmgh2 Where v1 is the speed of the heavy object during discharge, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 The remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, h1 is the height of the weight block corresponding to the discharge, h2 is the height of the weight block corresponding to the charge, and Δt1 is the discharge time of the gravity energy storage; The expression of the gravity energy storage charging operation characteristic model is: P C (t)=ηmgv2 S F =S F2 =ηmgh·k-δ F +P C (t)·Δt2 S C =S C2 =ηmgh·(1-k)-δ C -P C (t)·Δt2 Where v2 is the speed of the heavy object during charging, S F2 S is the remaining dischargeable capacity after gravity energy storage is charged considering the power market capacity. C2 The remaining rechargeable capacity after the gravity energy storage is charged to take into account the power market capacity, and Δt2 is the charging time of the gravity energy storage.

4. According to claim 1, a gravity energy storage low-carbon dispatching method based on the power capacity market is characterized by: The expression of the gravity energy storage low-carbon scheduling model is: S F ＞0 S C ＞0 Among them, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. F2 S is the remaining dischargeable capacity after gravity energy storage is charged considering the power market capacity. C is the remaining chargeable capacity, S C1 is the remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, S C2 is the remaining rechargeable capacity after the gravity energy storage is charged considering the power market capacity, P F (t) is the gravity energy storage discharge power, P C (t) is the charging power of the gravity energy storage, λ(t) is the carbon emission curve of the power grid, η is the efficiency of converting gravitational potential energy into electrical energy, m is the total mass of the gravity energy storage, g is the gravitational acceleration, h is the height of the gravity energy storage system, and k is the initial height coefficient of the weight block.

5. According to claim 1, a gravity energy storage low-carbon dispatching method based on the power capacity market is characterized by: The expressions of the constructed electricity capacity market compensation model for gravity energy storage and the gravity energy storage carbon trading model are: Y shic =d C ψ C +d F ψ F Among them, Y shic is the power market capacity compensation for gravity energy storage, ψ C is the market compensation price for the charging capacity of gravity energy storage, δ C The charging market capacity reserved for gravity energy storage, δ F The discharge market capacity reserved for gravity energy storage, ψ F Market compensation prices for the discharge capacity of gravity energy storage; Among them, Y CO2 Carbon trading revenue for gravity energy storage, is the carbon trading price, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, P C (t) is the gravity energy storage charging power, P F (t) is the discharge power of gravity energy storage, and λ(t) is the carbon emission curve of power grid.

6. A gravity energy storage low-carbon dispatching system based on the power capacity market, characterized by: The system comprises: The collection module is used to collect low-carbon dispatch data of gravity energy storage, including gravity energy storage operation data, power capacity market data, and carbon emission factor data; A gravity energy storage operation characteristic model construction module is used to construct a gravity energy storage operation characteristic model based on the power market capacity according to the energy conversion mechanism and the gravity energy storage low-carbon dispatch data, and use the gravity energy storage operation characteristic model to describe the gravity energy storage operation characteristics when considering the power capacity market; A low-carbon dispatch model building module is used to build a low-carbon dispatch model for gravity energy storage based on the gravity energy storage operation characteristics when considering the power capacity market, and use the gravity energy storage low-carbon dispatch model to perform low-carbon dispatch; The dispatching and settlement module is used to construct the electricity capacity market compensation model and the gravity energy storage carbon trading model for gravity energy storage. According to the low-carbon dispatching results, it calculates the carbon emission reduction of gravity energy storage during the dispatching period, and conducts carbon trading settlement to achieve low-carbon dispatching.

7. A gravity energy storage low-carbon dispatching system based on the power capacity market according to claim 6, characterized in that: The expression of the low-carbon dispatch data of gravity energy storage is: X(t)=[m,h,k,η,P F (t),P C (t),δ F ,d C ,λ(t)] Among them, X(t) is the collected low-carbon dispatch data of gravity energy storage, m is the total mass of gravity energy storage, h is the height of gravity energy storage system, k is the initial height coefficient of weight block, η is the efficiency of converting gravitational potential energy into electrical energy, P F (t) is the gravity energy storage discharge power, P C (t) is the gravity energy storage charging power, δ F The charging market capacity reserved for gravity energy storage, δ C is the discharge market capacity reserved for gravity energy storage, and λ(t) is the carbon emission curve of the power grid.

8. A gravity energy storage low-carbon dispatching system based on the power capacity market according to claim 7, characterized in that: According to the energy conversion mechanism and low-carbon dispatch data of gravity energy storage, a gravity energy storage operation characteristic model based on electricity market capacity is constructed, including: The energy conversion mechanism is the mechanism of converting gravitational potential energy into electrical energy, and the expression is: Where P(t) is the electrical power converted from gravitational potential energy by gravitational energy storage, E is gravitational potential energy, g is gravitational acceleration, t is time, and v is the speed of the weight; The gravity energy storage operation characteristic model based on the power market capacity includes the gravity energy storage discharge operation characteristic model and the gravity energy storage charging operation characteristic model; The expression of the gravity energy storage discharge operation characteristic model is: P F (t)=ηmgv1 S F =S F1 =ηmgh·k-δ F -P F (t)·Δt1 S C =S C1 =ηmgh·(1-k)-δ C +P F (t)·Δt1 d F =ηmgh1 d C =ηmgh2 Where v1 is the speed of the heavy object during discharge, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 The remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, h1 is the height of the weight block corresponding to the discharge, h2 is the height of the weight block corresponding to the charge, and Δt1 is the discharge time of the gravity energy storage; The expression of the gravity energy storage charging operation characteristic model is: P C (t)=ηmgv2 S F =S F2 =ηmgh·k-δ F +P C (t)·Δt2 S C =S C2 =ηmgh·(1-k)-δ C -P C (t)·Δt2 Where v2 is the speed of the heavy object during charging, S F2 S is the remaining dischargeable capacity after gravity energy storage is charged considering the power market capacity. C2 The remaining rechargeable capacity after the gravity energy storage is charged to take into account the power market capacity, and Δt2 is the charging time of the gravity energy storage.

9. The gravity energy storage low-carbon dispatching system based on the power capacity market according to claim 7 is characterized by: The expression of the gravity energy storage low-carbon scheduling model is: S F ＞0 S C ＞0 Among them, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, S F is the remaining dischargeable capacity, S F1 S is the remaining dischargeable capacity after the gravity energy storage is discharged considering the power market capacity. C is the remaining chargeable capacity, S C1 is the remaining rechargeable capacity after the gravity energy storage is discharged considering the power market capacity, S F2 S is the remaining dischargeable capacity after gravity energy storage is charged considering the power market capacity. C2 is the remaining rechargeable capacity after the gravity energy storage is charged considering the power market capacity, P F (t) is the gravity energy storage discharge power, P C (t) is the charging power of the gravity energy storage, λ(t) is the carbon emission curve of the power grid, η is the efficiency of converting gravitational potential energy into electrical energy, m is the total mass of the gravity energy storage, g is the gravitational acceleration, h is the height of the gravity energy storage system, and k is the initial height coefficient of the weight block.

10. A gravity energy storage low-carbon dispatching system based on the power capacity market according to claim 7, characterized in that: The expressions of the constructed electricity capacity market compensation model for gravity energy storage and the gravity energy storage carbon trading model are: Y shic =d C ψ C +d F ψ F Among them, Y shic is the power market capacity compensation for gravity energy storage, ψ C is the market compensation price for the charging capacity of gravity energy storage, δ C The charging market capacity reserved for gravity energy storage, δ F The discharge market capacity reserved for gravity energy storage, ψ F Market compensation prices for the discharge capacity of gravity energy storage; Among them, Y CO2 Carbon trading revenue for gravity energy storage, is the carbon trading price, t c1 ,t c2 are the start and end time of gravity energy storage discharge, t F1 ,t F2 are the start and end time of gravity energy storage charging, P C (t) is the gravity energy storage charging power, P F (t) is the discharge power of gravity energy storage, and λ(t) is the carbon emission curve of power grid.

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