Electricity-heat-hydrogen energy storage configuration method for improving source network load storage integrated regulation capability

Abstract

The invention discloses an electricity-heat-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability, and relates to the technical field of energy storage, and the method comprises the following steps: firstly, taking a source-grid-load-storage integrated internal power supply, load and energy storage as the basis, and taking electric power balance and electric quantity balance as constraint targets; establishing an electrochemical energy storage model, a heat energy storage model and a hydrogen energy storage model; secondly, on the basis of a source-network-load-storage integrated internal power supply, a load and an energy storage production time sequence, establishing a source-network-load-storage integrated internal adjustment capability model; and finally, establishing a double-layer optimization model of source network load storage integrated internal electricity-heat-hydrogen energy storage optimization configuration. According to the method, comprehensive utilization of internal electrochemical energy storage, heat energy storage and hydrogen energy storage is fully considered in a source-grid-load-storage integrated scene, the advantages of internal and external electricity prices are utilized to the maximum extent, the overall application effect of source-grid-load-storage integration is optimal, dependence on peak regulation and frequency modulation of an external power grid is reduced, and the use flexibility of a source-grid-load-storage integrated project is improved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an electric-thermal-hydrogen energy storage configuration method for improving the integrated regulation capability of source, grid, load and storage. Background Art

[0002] In the development trend of power source, grid, load and storage integration and multi-energy complementarity, it is necessary to give full play to the coordination and mutual assistance capabilities of source, grid, load and storage, and strengthen the regulation capabilities of source, grid, load and storage integration. The source, grid, load and storage integration project uses wind and solar new energy power generation as the basic power source, configures certain energy storage facilities, and jointly supplies power to the source, grid, load and storage integration project. Because it can achieve coordinated utilization of source, grid, load and storage resources, it has received widespread attention and demonstrated applications in various provinces, and it also requires reducing its regulation support requirements for large power grids. However, the source, grid, load and storage integration project is affected by the power supply and energy storage configuration mode, energy utilization methods, etc., and its own regulation capacity is limited, resulting in a high degree of dependence on the external power grid. It is necessary to carry out research on the optimal configuration method of electric-thermal-hydrogen energy storage to improve the regulation capacity of source, grid, load and storage integration, and use the regulation capacity of multiple types of energy storage to improve the ability to absorb new energy power generation and improve the safe operation level of regional power grids. Summary of the invention

[0003] The technical problem to be solved by the present invention is to solve the deficiencies in the prior art and to design an electric-thermal-hydrogen energy storage configuration method that improves the integrated regulation capability of source, grid, load and storage. The present invention can improve the internal regulation capability of the integrated source, grid, load and storage and reduce dependence on the external power grid.

[0004] This method considers the comprehensive utilization of electrochemical energy storage, thermal energy storage, and hydrogen energy storage in the scenario of source-grid-load-storage integration, establishes the operation framework of the source-grid-load-storage integration system, and then proposes an internal regulation capability model for source-grid-load-storage integration, and constructs a two-layer optimization model for the optimal configuration of internal electricity-heat-hydrogen energy storage for source-grid-load-storage integration. It fully utilizes the advantages of multi-type energy storage regulation, maximizes the advantages of internal and external electricity prices, achieves the optimal overall application effect of source-grid-load-storage integration, reduces dependence on external power grid peak and frequency regulation, and increases the flexibility of source-grid-load-storage integration projects.

[0005] The solution adopted by the present invention to solve the technical problem is:

[0006] The electric-heat-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability comprises the following steps:

[0007] Step (1): Based on the internal power supply, load and energy storage of the source-grid-load-storage integration, and with power balance and electricity balance as constraint targets, an electrochemical energy storage model, a thermal energy storage model and a hydrogen energy storage model are established;

[0008] Step (2): Based on step (1), an internal regulation capability model of the source-grid-load-storage integration is established based on the internal power source, load and energy storage production sequence of the source-grid-load-storage integration;

[0009] Step (3): Based on step (2), a two-layer optimization model for the optimal configuration of internal electricity-heat-hydrogen energy storage in the integrated source-grid-load-storage system is established.

[0010] As a preferred embodiment of the present invention, the constraint model of power balance in step (1) is:

[0011] P s (t)+P G (t)+P E (t)+P C (t)+P H (t)≥P L (t)

[0012] Where P s (t) represents the photovoltaic power generation power of the photovoltaic power generation inside the source-grid-load-storage integration scenario at time t;

[0013] P G (t) represents the wind power generation power of the internal wind power generation in the source-grid-load-storage integration scenario at time t;

[0014] P E (t) represents the power that the electrochemical energy storage device can release or absorb at time t in the source-grid-load-storage integration scenario;

[0015] P C (t) represents the power of the internal heat storage device in the source-grid-load-storage integration scenario after the heat storage device releases heat to do work at time t;

[0016] P H (t) represents the power that can be released by the hydrogen energy device in the source-grid-load-storage integration scenario at time t;

[0017] P L (t) represents the power absorbed by the load at time t;

[0018] The power balance constraint model in step (1) is:

[0019] E s (t)+E G (t)+E E (t)+E C (t)+E H (t)≥E L (t)

[0020] E s(t) represents the amount of electricity generated by photovoltaic power generation in the source-grid-load-storage integration scenario at time t;

[0021] E G (t) represents the amount of electricity generated by wind power generation in the source-grid-load-storage integration scenario at time t;

[0022] E E (t) represents the amount of electricity released or absorbed by the internal electrochemical energy storage at time t in the source-grid-load-storage integration scenario;

[0023] E C (t) represents the amount of electricity released or absorbed by the internal thermal energy storage device in the source-grid-load-storage integration scenario at time t;

[0024] E H (t) represents the amount of electricity released or absorbed by the internal hydrogen energy storage device in the source-grid-load-storage integration scenario at time t;

[0025] E L (t) represents the amount of electricity absorbed by the internal load in the source-grid-load-storage integration scenario at time t.

[0026] As a preferred embodiment of the present invention, the electrochemical energy storage model in step (1) is:

[0027]

[0028] P ch,E represents the charging power of electrochemical energy storage at time t;

[0029] η ch Indicates the charging efficiency of electrochemical energy storage;

[0030] P di,E represents the discharge power of electrochemical energy storage at time t;

[0031] η di Indicates the discharge efficiency of electrochemical energy storage;

[0032] S OC,E Indicates the state of charge of electrochemical energy storage;

[0033] E ra,E Indicates the rated capacity of electrochemical energy storage.

[0034] As a preferred embodiment of the present invention, the thermal energy storage model in step (1) is:

[0035]

[0036] Q C，ab It represents the total heat absorbed by the internal heat storage medium in the source-grid-load-storage integration scenario at time t;

[0037] Q M It represents the heat absorbed by the internal heat storage medium of the source-grid-load-storage integration scenario at time t;

[0038] Q H Indicates the heat released at time t when the internal hydrogen energy storage device in the source-grid-load-storage integration scenario does work;

[0039] η H Indicates the efficiency of storing heat generated by the internal hydrogen energy storage device after work in the source-grid-load-storage integration scenario in the heat storage medium;

[0040] Q L It represents the heat released by the internal load in the source-grid-load-storage integration scenario at time t;

[0041] η L It indicates the efficiency of storing the heat generated by the internal load after work in the source-grid-load-storage integration scenario in the heat storage medium;

[0042] P S,C Indicates the abandoned power of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0043] P G,C Indicates the abandoned power of wind power generation in the source-grid-load-storage integration scenario;

[0044] P O Indicates the input power of the external power grid in the source-grid-load-storage integration scenario;

[0045] M M Indicates the quality of heat storage medium in the source-grid-load-storage integration scenario;

[0046] C M Indicates the specific heat of the heat storage medium in the source-grid-load-storage integration scenario;

[0047] ΔT represents the heat absorption time of the heat storage medium in the source-grid-load-storage integration scenario;

[0048] Q C，re Indicates the total amount of heat that can be released by the internal heat storage medium in the source-grid-load-storage integration scenario;

[0049] η C It represents the efficiency of the internal heat storage medium in the source-grid-load-storage integration scenario.

[0050] As a preferred embodiment of the present invention, the hydrogen energy storage model in step (1) is:

[0051]

[0052] Where: Q ht Indicates the hydrogen storage capacity of the internal hydrogen storage tank in the source-grid-load-storage integration scenario;

[0053] Q ht,b Indicates the original hydrogen storage capacity of the internal hydrogen storage tank in the source-grid-load-storage integration scenario;

[0054] ρ el Indicates the electric energy consumed by the internal alkaline cell electrolyzer to produce one kg of hydrogen in the source-grid-load-storage integration scenario; n hy is the conversion efficiency of the alkaline cell electrolyzer;

[0055] n el is the calorific value constant of hydrogen;

[0056] P H,di Indicates the power of hydrogen power generation in the source-grid-load-storage integration scenario;

[0057] p fc Indicates the amount of hydrogen consumed by hydrogen power generation in the source-grid-load-storage integration scenario;

[0058] η fc Indicates the hydrogen conversion efficiency of hydrogen power generation;

[0059] η ht Indicates the efficiency of the hydrogen storage tank.

[0060] As a preferred implementation of the present invention, the source-grid-load-storage integrated internal regulation capability model in step (2) includes a load regulation capability model and a power source-energy storage regulation capability model.

[0061] As a preferred implementation of the present invention, the load regulation capability model is:

[0062]

[0063] It represents the minimum power absorbed at time t in the source-grid-load-storage integration scenario;

[0064] P L Represents the power absorbed at time t in the source-grid-load-storage integration scenario;

[0065] It represents the maximum power absorbed at time t in the source-grid-load-storage integration scenario;

[0066] Indicates the load that can be interrupted at time t in the source-grid-load-storage integration scenario;

[0067] Indicates the minimum time of interruption of load within the source-grid-load-storage integration scenario;

[0068] Indicates the interruption time of a certain type of interruptible load in the source-grid-load-storage integration scenario;

[0069] Indicates the total time of interruption of the interruptible load in the source-grid-load-storage integration scenario;

[0070] Indicates the interruption time of various interruptible loads in the source-grid-load-storage integration scenario;

[0071] It represents the minimum daily output of products in the source-grid-load-storage integration scenario;

[0072] Y P It represents the daily production value of products in the source-grid-load-storage integration scenario;

[0073] It represents the maximum daily output of products within the source-grid-load-storage integration scenario.

[0074] As a preferred embodiment of the present invention, the power supply-energy storage regulation capability model includes an upward regulation capability model and a downward regulation capability model;

[0075] The upward capacity adjustment model is:

[0076]

[0077] P up Indicates that the internal power supply-energy storage in the source-grid-load-storage integration scenario adjusts the power upward;

[0078] q represents the heat consumption rate of internal heat utilization power generation in the source-grid-load-storage integration scenario;

[0079] η g Indicates the efficiency of internal heat utilization for power generation in the source-grid-load-storage integration scenario;

[0080] The downward capacity adjustment model is:

[0081]

[0082] P down Indicates that the internal power supply-energy storage in the source-grid-load-storage integration scenario adjusts power downward.

[0083] As a preferred embodiment of the present invention, the double-layer optimization model in step (3) comprises an upper optimization model of electric-thermal-hydrogen energy storage and a lower optimization model of electric-thermal-hydrogen energy storage, wherein the upper optimization model of electric-thermal-hydrogen energy storage is established with the goal of optimizing the internal regulation capability of the source-grid-load-storage integration, and the lower optimization model of electric-thermal-hydrogen energy storage is established with the goal of optimizing the overall economic efficiency of the source-grid-load-storage integration;

[0084] Upper-level optimization model of electric-thermal-hydrogen energy storage:

[0085] MaxPal =P s,up +P s,down +P L

[0086] P al Indicates the maximum regulation capacity within the source-grid-load-storage integration scenario;

[0087] The upper optimization model sets constraints:

[0088] P s (t)+P G (t)+P E (t)+P C (t)+P H (t)≥P L (t)

[0089] P S,C (t)+P G,C (t)≥0

[0090] E s (t)+E G (t)+E E (t)+E C (t)+E H (t)≥E L (t)

[0091] E S,C (t)+E G,C (t)≥0

[0092]

[0093] P O (t)≥0

[0094]

[0095] The underlying optimization model for electric-thermal-hydrogen energy storage is:

[0096] MinC al =C S +C G +C E +C R +C H +C O

[0097]

[0098] C O =C O,s +C O,f +C O,in

[0099] Where: Cal Represents the minimum cost within the source-grid-load-storage integration scenario;

[0100] C S Represents the cost of photovoltaic power generation within the source-grid-load-storage integration scenario;

[0101] C G Represents the cost of wind power generation in the source-grid-load-storage integration scenario;

[0102] C E Represents the cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0103] C R Indicates the cost of thermal energy storage in the source-grid-load-storage integration scenario;

[0104] C H Indicates the cost of hydrogen energy storage in the source-grid-load-storage integration scenario;

[0105] C O Represents the cost of external regulation capability in the source-grid-load-storage integration scenario;

[0106] C S，ui P represents the unit initial investment cost of photovoltaic power generation in the source-grid-load-storage integration scenario; S，c Indicates the installed capacity of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0107] C S，ma Represents the operation and maintenance cost of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0108] C S，di Represents the scrapping cost of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0109] C S，re Indicates the residual value recovery of photovoltaic power generation within the source-grid-load-storage integration scenario;

[0110] C S，re P represents the unit replacement cost of photovoltaic power generation in the source-grid-load-storage integration scenario; S，re represents the unit renewal replacement scale of photovoltaic power generation in the source-grid-load-storage integration scenario; C G，ui represents the unit initial investment cost of wind power generation in the source-grid-load-storage integration scenario; P G，c Indicates the installed capacity of wind power generation in the source-grid-load-storage integration scenario;

[0111] C G，ma Represents the operation and maintenance cost of wind power generation in the source-grid-load-storage integration scenario;

[0112] C G，diRepresents the scrapping cost of wind power generation in the source-grid-load-storage integration scenario;

[0113] C G，re Represents the residual value recovery of wind power generation within the source-grid-load-storage integration scenario;

[0114] C G，re P represents the unit replacement cost of wind power generation in the source-grid-load-storage integration scenario; G，re represents the unit renewal replacement scale of wind power generation in the source-grid-load-storage integration scenario; C E，ui represents the unit initial investment cost of electrochemical energy storage in the source-grid-load-storage integration scenario; P E，c represents the installed capacity of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，ma Represents the operation and maintenance cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0115] C E，di Represents the scrapping cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0116] C E，re Represents the residual value recovery of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，ch represents the charging cost of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，re P represents the unit renewal replacement cost of electrochemical energy storage in the source-grid-load-storage integration scenario; E，re represents the unit renewal replacement scale of electrochemical energy storage in the source-grid-load-storage integration scenario; C S，C Represents the cost of power abandonment of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0117] C S，G Represents the cost of curtailed power generation in the integrated source-grid-load-storage scenario;

[0118] C S，OP Indicates the basic electricity price cost of external electricity purchase in the source-grid-load-storage integration scenario;

[0119] C R，ui Represents the unit initial investment cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0120] P R，c Indicates the scale of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0121] C R，ma Represents the operation and maintenance cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0122] C R，di Represents the scrapping cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0123] C R，re Demonstrate residual value recovery of internal thermal energy storage in source-grid-load-storage integration scenario;

[0124] P R，c Indicates the unit renewal replacement scale of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0125] C R，ch Indicates the charging cost of thermal energy storage in the source-grid-load-storage integration scenario;

[0126] C R，re Represents the unit renewal replacement cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0127] P R，re Indicates the unit renewal replacement scale of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0128] C R，wh Represents the unit initial investment cost of waste heat recovery within the source-grid-load-storage integration scenario;

[0129] P R，ch Indicates the scale of waste heat recovery within the source-grid-load-storage integration scenario;

[0130] C H，ui Represents the unit initial investment cost of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0131] P H，c Indicates the scale of hydrogen energy storage within the source-grid-load-storage integration scenario;

[0132] C H，ma Represents the operation and maintenance cost of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0133] C H，di Represents the scrapping cost of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0134] C H，re Demonstrate residual value recovery of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0135] C H，ch Indicates the charging cost of hydrogen energy storage in the source-grid-load-storage integration scenario;

[0136] C H，re Represents the unit renewal replacement cost of hydrogen energy storage in the source-grid-load-storage integration scenario;

[0137] P H，re Indicates the unit renewal and replacement scale of hydrogen energy storage within the source-grid-load-storage integration scenario;

[0138] C O,s Represents the backup capacity cost of the external power grid in the source-grid-load-storage integration scenario;

[0139] C O,f Represents the frequency regulation cost of the external power grid in the source-grid-load-storage integration scenario;

[0140] C O,in Represents the inertia cost of the external power grid in the source-grid-load-storage integration scenario.

[0141] Compared with the prior art, the present invention has the following beneficial effects:

[0142] The present invention proposes an electric-heat-hydrogen energy storage configuration method for improving the regulation capability of source-grid-load-storage integration. Firstly, based on the internal power supply, load and energy storage of source-grid-load-storage integration, and with power balance and electric quantity balance as constraint targets, an electrochemical energy storage model, a thermal energy storage model and a hydrogen energy storage model are established. Secondly, based on the electrochemical energy storage model, the thermal energy storage model and the hydrogen energy storage model as well as the internal power supply, load and energy storage production sequence of source-grid-load-storage integration, an internal regulation capability model of source-grid-load-storage integration is established. Finally, on the basis of the internal regulation capability model of source-grid-load-storage integration, a double-layer optimization model for the optimal configuration of electric-heat-hydrogen energy storage within the source-grid-load-storage integration is established.

[0143] The present invention considers the integrated source-grid-load-storage scenario while fully considering the comprehensive utilization of internal electrochemical energy storage, thermal energy storage, and hydrogen energy storage, maximizes the advantages of internal and external electricity prices, achieves the optimal overall application effect of the integrated source-grid-load-storage, reduces dependence on peak-shaving and frequency regulation of the external power grid, and increases the flexibility of the use of the integrated source-grid-load-storage project. BRIEF DESCRIPTION OF THE DRAWINGS

[0144] Figure 1 This is an overall step diagram of the electric-thermal-hydrogen energy storage configuration method proposed in the present invention to enhance the integrated regulation capability of source, grid, load and storage. DETAILED DESCRIPTION

[0145] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments:

[0146] It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0147] like Figure 1As shown, the electric-thermal-hydrogen energy storage configuration method of the present invention improves the regulation capability of source-grid-load-storage integration, taking into account the source-grid-load-storage integration scenario, fully considering the comprehensive utilization of internal electrochemical energy storage, thermal energy storage, and hydrogen energy storage, and making the best use of the advantages of internal and external electricity prices to achieve the best overall application effect of source-grid-load-storage integration, reduce dependence on external power grid peak regulation and frequency regulation, and increase the flexibility of source-grid-load-storage integration projects. Specifically, it includes the following steps:

[0148] Step (1): Based on the internal power supply, load and energy storage of the source-grid-load-storage integration, and with power balance and electricity balance as constraint targets, an electrochemical energy storage model, a thermal energy storage model and a hydrogen energy storage model are established;

[0149] Step (2): Based on step (1), an internal regulation capability model of the source-grid-load-storage integration is established based on the internal power source, load and energy storage production sequence of the source-grid-load-storage integration;

[0150] Step (3): Based on step (2), a two-layer optimization model for the optimal configuration of internal electricity-heat-hydrogen energy storage in the integrated source-grid-load-storage system is established.

[0151] In principle, the integrated source-grid-load-storage project relies on internal power sources, loads, and energy storage to achieve self-balancing. Under this condition, the power released by wind, solar power sources, electrochemical energy storage, thermal energy storage, and hydrogen energy storage must not be less than the power absorbed by the load. Only in this way can the power balance within the integrated source-grid-load-storage scenario be guaranteed at a certain moment.

[0152] Secondly, in terms of time scale, the electricity released by wind, photovoltaic power, electrochemical energy storage, thermal energy storage, and hydrogen energy storage in the integrated source-grid-load-storage project is not less than the electricity absorbed by the load. The electricity released by electrochemical energy storage, thermal energy storage, and hydrogen energy storage can come from both the source-grid-load-storage scenario and the low-cost electricity from the external power grid.

[0153] In this embodiment, the role of the production sequence is mainly to reflect the absorption or release of electricity in different time periods by electrochemical energy storage, thermal energy storage, and hydrogen energy storage. For example, when photovoltaic power generation is high during the day, excess electricity will be stored through chemical energy storage, thermal energy storage, and hydrogen energy storage. When only the efficiency of electric energy conversion is considered, in theory, the priority of electricity storage is electrochemical energy storage first, thermal energy storage second, and hydrogen energy storage last. During the low or deep valley electricity price period of the external power grid at night, the electricity transmitted by the external power grid can be used to charge various energy storages inside the source grid-load storage to reduce the cost of relying on the external power grid for power supply when the source grid-load storage is insufficient in new energy / energy storage power. The input power of the external power grid is considered in the thermal energy storage model, the hydrogen energy storage model, and the two-layer optimization model.

[0154] The constraint model of the internal power balance in the source-grid-load-storage integration scenario in the above step (1) is:

[0155] Ps (t)+P G (t)+P E (t)+P C (t)+P H (t)≥P L (t)

[0156] Among them, P s (t) represents the photovoltaic power generation power of the photovoltaic power generation inside the source-grid-load-storage integration scenario at time t;

[0157] P G (t) represents the wind power generation power of the internal wind power generation in the source-grid-load-storage integration scenario at time t;

[0158] P E (t) represents the power that the electrochemical energy storage device can release or absorb at time t in the source-grid-load-storage integration scenario;

[0159] P C (t) represents the power of the internal heat storage device in the source-grid-load-storage integration scenario after the heat storage device releases heat to do work at time t;

[0160] P H (t) represents the power that can be released by the hydrogen energy device in the source-grid-load-storage integration scenario at time t;

[0161] P L (t) represents the power absorbed by the load at time t.

[0162] In step (1), the internal power balance constraint model of the source-grid-load-storage integration scenario is:

[0163] E s (t)+E G (t)+E E (t)+E C (t)+E H (t)≥E L (t)

[0164] E s (t) represents the amount of electricity generated by photovoltaic power generation in the source-grid-load-storage integration scenario at time t;

[0165] E G (t) represents the amount of electricity generated by wind power generation in the source-grid-load-storage integration scenario at time t;

[0166] E E (t) represents the amount of electricity released or absorbed by the internal electrochemical energy storage at time t in the source-grid-load-storage integration scenario;

[0167] E C(t) represents the amount of electricity released or absorbed by the internal thermal energy storage device in the source-grid-load-storage integration scenario at time t;

[0168] E H (t) represents the amount of electricity released or absorbed by the internal hydrogen energy storage device in the source-grid-load-storage integration scenario at time t;

[0169] E L (t) represents the amount of electricity absorbed by the internal load in the source-grid-load-storage integration scenario at time t.

[0170] The electrochemical energy storage model in step (1) is

[0171]

[0172] In this formula: P ch,E represents the charging power of electrochemical energy storage at time t;

[0173] η ch Indicates the charging efficiency of electrochemical energy storage;

[0174] P di,E represents the discharge power of electrochemical energy storage at time t;

[0175] η di Represents the discharge efficiency of electrochemical energy storage.

[0176]

[0177] In this formula: S OC,E Indicates the state of charge of electrochemical energy storage;

[0178] E ra,E Indicates the rated capacity of electrochemical energy storage.

[0179] The thermal energy storage model established in step (1) is

[0180]

[0181] In this formula: Q C，ab It represents the total heat absorbed by the internal heat storage medium in the source-grid-load-storage integration scenario at time t;

[0182] Q M It represents the heat absorbed by the internal heat storage medium of the source-grid-load-storage integration scenario at time t;

[0183] Q H Indicates the heat released at time t when the internal hydrogen energy storage device in the source-grid-load-storage integration scenario does work;

[0184] η HIndicates the efficiency of storing heat generated by the internal hydrogen energy storage device after work in the source-grid-load-storage integration scenario in the heat storage medium;

[0185] Q L It represents the heat released by the internal load in the source-grid-load-storage integration scenario at time t;

[0186] η L It indicates the efficiency of storing the heat generated by the internal load after work in the source-grid-load-storage integration scenario in the heat storage medium.

[0187]

[0188] In this formula: P S,C Indicates the abandoned power of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0189] P G,C Indicates the abandoned power of wind power generation in the source-grid-load-storage integration scenario;

[0190] P O Indicates the input power of the external power grid in the source-grid-load-storage integration scenario;

[0191] Δt represents the time for the source-grid-load-storage integration scenario to absorb internal or external power;

[0192] M M Indicates the quality of heat storage medium in the source-grid-load-storage integration scenario;

[0193] C M Indicates the specific heat of the heat storage medium in the source-grid-load-storage integration scenario;

[0194] ΔT represents the heat absorption time of the heat storage medium in the source-grid-load-storage integration scenario.

[0195]

[0196] In this formula: Q C，re Indicates the total amount of heat that can be released by the internal heat storage medium in the source-grid-load-storage integration scenario;

[0197] η C It represents the efficiency of the internal heat storage medium in the source-grid-load-storage integration scenario.

[0198] Because thermal energy storage causes losses when storing heat, it cannot all be used to do work and generate active power when released, thus drawing out the amount of electricity that can be released by thermal energy storage.

[0199] The hydrogen energy storage model in step (1) is:

[0200]

[0201] In this formula: Q htIndicates the hydrogen storage capacity of the internal hydrogen storage tank in the source-grid-load-storage integration scenario;

[0202] Q ht,b Indicates the original hydrogen storage capacity of the internal hydrogen storage tank in the source-grid-load-storage integration scenario;

[0203] Δt represents the time of hydrogen production by electrolysis of water in the integrated source-grid-load-storage scenario;

[0204] ρ el It represents the electric energy consumed by the alkaline cell electrolyzer in the source-grid-load-storage integration scenario to produce one kg of hydrogen.

[0205]

[0206] In this formula: n hy is the conversion efficiency of the alkaline cell electrolyzer;

[0207] n el is the calorific value constant of hydrogen.

[0208]

[0209] In this formula: P H,di Indicates the power of hydrogen power generation in the source-grid-load-storage integration scenario;

[0210] Δt represents the time of internal hydrogen power generation in the source-grid-load-storage integration scenario;

[0211] p fc Indicates the amount of hydrogen consumed by hydrogen power generation in the source-grid-load-storage integration scenario.

[0212] This formula reflects the change in the capacity of the hydrogen storage tank when hydrogen energy is stored for power generation. The theoretical minimum capacity of the hydrogen storage tank is 0.

[0213]

[0214] In this formula: η fc Indicates the hydrogen conversion efficiency of hydrogen power generation;

[0215] η ht Indicates the efficiency of the hydrogen storage tank.

[0216] The role of the production sequence in step (2) is mainly to reflect the absorption or release of electricity by electrochemical energy storage, thermal energy storage, and hydrogen energy storage in different time periods.

[0217] For example, when photovoltaic power generation is high during the day, the excess electricity will be stored through chemical energy storage, thermal energy storage, and hydrogen energy storage. When only considering the efficiency of electricity conversion, in theory, the priority of electricity storage is electrochemical energy storage first, then thermal energy storage, and finally hydrogen energy storage.

[0218] During the low or deep valley electricity price period of the external power grid at night, the electricity transmitted from the external power grid can be used to charge various energy storages inside the source, grid, load and storage, so as to reduce the cost of relying on the external power grid for power supply when the source, grid, load and storage is insufficient in terms of new energy / energy storage power.

[0219] The regulation capability within the source-grid-load-storage integration scenario is to reduce load output and power consumption through internal load response; second, to improve regulation capability through the cooperation between power supply and energy storage, absorb power when the power of new energy is abundant, and use various energy storage to supply power to the internal load of the source-grid-load-storage when the power of new energy is insufficient. The internal regulation capability model of the source-grid-load-storage integration established in step (2) includes a load regulation capability model and a power supply-energy storage regulation capability model.

[0220] The load capacity model is:

[0221]

[0222] In this formula: It represents the minimum power absorbed at time t in the source-grid-load-storage integration scenario;

[0223] P L Represents the power absorbed at time t in the source-grid-load-storage integration scenario;

[0224] Indicates the maximum power absorbed at time t within the source-grid-load-storage integration scenario.

[0225]

[0226] In this formula: Represents the load that can be interrupted at time t within the source-grid-load-storage integration scenario.

[0227] The load regulation capability is related to the time during which the load can be interrupted. This formula is intended to reflect the percentage of interruptible loads within the source-grid-load-storage scenario as a constraint on the load regulation capability.

[0228]

[0229] In this formula: Indicates the minimum time of interruption of load within the source-grid-load-storage integration scenario;

[0230] Indicates the interruption time of a certain type of interruptible load in the source-grid-load-storage integration scenario;

[0231] Indicates the total time of interruption of the interruptible load in the source-grid-load-storage integration scenario;

[0232] Indicates the interruption time of various interruptible loads in the source-grid-load-storage integration scenario.

[0233]

[0234] In this formula: It represents the minimum daily output of products in the source-grid-load-storage integration scenario;

[0235] Y P It represents the daily production value of products in the source-grid-load-storage integration scenario;

[0236] It represents the maximum daily output of products within the source-grid-load-storage integration scenario.

[0237] Product output serves as a constraint on the internal load regulation capacity of the source-grid-load-storage scenario, because the most essential purpose of the project is to produce products.

[0238] The power supply-energy storage regulation capability model includes an upward regulation capability model and a downward regulation capability model.

[0239] The upward adjustment capability model is:

[0240]

[0241] In this formula: P up Indicates that the internal power supply-energy storage in the source-grid-load-storage integration scenario adjusts the power upward;

[0242] q represents the heat consumption rate of internal heat utilization power generation in the source-grid-load-storage integration scenario;

[0243] η g It represents the efficiency of internal heat utilization for power generation in the source-grid-load-storage integration scenario.

[0244] The downward adjustment capability model is:

[0245]

[0246] P down Indicates that the internal power supply-energy storage in the source-grid-load-storage integration scenario adjusts power downward.

[0247] The two-layer optimization model for the optimal configuration of the internal electric-thermal-hydrogen energy storage of the source-grid-load-storage integration established in step (3) includes an upper optimization model of electric-thermal-hydrogen energy storage and a lower optimization model of electric-thermal-hydrogen energy storage. The upper optimization model of electric-thermal-hydrogen energy storage is established with the goal of optimizing the internal regulation capacity of the source-grid-load-storage integration; the lower optimization model of electric-thermal-hydrogen energy storage is established with the goal of optimizing the overall economic efficiency of the source-grid-load-storage integration.

[0248] Upper-level optimization model for electric-thermal-hydrogen energy storage

[0249] MaxP al =P s,up +P s,down +P L

[0250] In this formula: P al Indicates the maximum regulation capacity within the source-grid-load-storage integration scenario.

[0251] The constraints of this model are:

[0252] Power balance constraints:

[0253] P s (t)+P G (t)+P E (t)+P C (t)+P H (t)≥P L (t)

[0254] Main power supply constraints: In order to reflect the source-grid-load-storage scenario, the internal power supply is wind power, photovoltaic power generation (or one of them) as the main power supply, which is consistent with the source-grid-load-storage policy issued by the state.

[0255] P S,C (t)+P G,C (t)≥0

[0256] Power balance constraints:

[0257] E s (t)+E G (t)+E E (t)+E C (t)+E H (t)≥E L (t)

[0258] Wind power and photovoltaic power generation constraints: Wind power and photovoltaic power generation must generate electricity and cannot rely entirely on external electricity:

[0259] E S,C (t)+E G,C (t)≥0

[0260] Electrochemical energy storage constraints: Electrochemical energy storage can be charged and discharged:

[0261]

[0262] The first constraint of thermal energy storage:

[0263]

[0264] Hydrogen energy storage constraints: Hydrogen energy storage can absorb low-cost electricity from the outside

[0265] P O (t)≥0

[0266] The second constraint of thermal energy storage:

[0267]

[0268] The third constraint of thermal energy storage: thermal energy storage takes into account the waste heat recovery when the load is working

[0269]

[0270] The underlying optimization model for electric-thermal-hydrogen energy storage is:

[0271] MinC al =C S +C G +C E +C R +C H +C O

[0272] In this formula: C al Represents the minimum cost within the source-grid-load-storage integration scenario;

[0273] C S Represents the cost of photovoltaic power generation within the source-grid-load-storage integration scenario;

[0274] C G Represents the cost of wind power generation in the source-grid-load-storage integration scenario;

[0275] C E Represents the cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0276] C R Indicates the cost of thermal energy storage in the source-grid-load-storage integration scenario;

[0277] C H Indicates the cost of hydrogen energy storage in the source-grid-load-storage integration scenario;

[0278] C O Represents the cost of external regulation capability in the source-grid-load-storage integration scenario.

[0279]

[0280] In this formula: C S，ui P represents the unit initial investment cost of photovoltaic power generation in the source-grid-load-storage integration scenario; S，c Indicates the installed capacity of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0281] C S，maRepresents the operation and maintenance cost of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0282] C S，di Represents the scrapping cost of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0283] C S，re Indicates the residual value recovery of photovoltaic power generation within the source-grid-load-storage integration scenario;

[0284] C S，re Represents the unit renewal replacement cost of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0285] P S，re It represents the unit renewal and replacement scale of photovoltaic power generation within the source-grid-load-storage integration scenario.

[0286]

[0287] In this formula: C G，ui Represents the unit initial investment cost of wind power generation in the source-grid-load-storage integration scenario;

[0288] P G，c Indicates the installed capacity of wind power generation in the source-grid-load-storage integration scenario;

[0289] C G，ma Represents the operation and maintenance cost of wind power generation in the source-grid-load-storage integration scenario;

[0290] C G，di Represents the scrapping cost of wind power generation in the source-grid-load-storage integration scenario;

[0291] C G，re Represents the residual value recovery of wind power generation within the source-grid-load-storage integration scenario;

[0292] C G，re Represents the unit renewal and replacement cost of wind power generation in the source-grid-load-storage integration scenario;

[0293] P G，re It represents the unit renewal and replacement scale of wind power generation within the source-grid-load-storage integration scenario.

[0294]

[0295] In this formula: C E，ui Represents the unit initial investment cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0296] P E，c Indicates the installed capacity of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0297] C E，maRepresents the operation and maintenance cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0298] C E，di Represents the scrapping cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0299] C E，re Represents the residual value recovery of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0300] C E，ch Represents the charging cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0301] C E，re Represents the unit renewal replacement cost of electrochemical energy storage in the source-grid-load-storage integration scenario;

[0302] P E，re It represents the unit renewal and replacement scale of electrochemical energy storage within the source-grid-load-storage integration scenario.

[0303] C E，ch =C S，C +C S，G +C S，OP

[0304] In this formula: C S，C Represents the cost of power abandonment of photovoltaic power generation in the source-grid-load-storage integration scenario;

[0305] C S，G Represents the cost of curtailed power generation in the integrated source-grid-load-storage scenario;

[0306] C S，OP It represents the basic electricity price cost of external electricity purchase in the source-grid-load-storage integration scenario.

[0307]

[0308] In this formula: C R，ui P represents the unit initial investment cost of internal thermal energy storage in the source-grid-load-storage integration scenario; R，c Indicates the scale of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0309] C R，ma Represents the operation and maintenance cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0310] C R，di Represents the scrapping cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0311] C R，re Demonstrate residual value recovery of internal thermal energy storage in source-grid-load-storage integration scenario;

[0312] PR，c Indicates the unit renewal replacement scale of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0313] C R，ch Indicates the charging cost of thermal energy storage in the source-grid-load-storage integration scenario;

[0314] C R，re Represents the unit renewal replacement cost of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0315] P R，re Indicates the unit renewal replacement scale of internal thermal energy storage in the source-grid-load-storage integration scenario;

[0316] C R，wh Represents the unit initial investment cost of waste heat recovery within the source-grid-load-storage integration scenario;

[0317] P R，ch Indicates the scale of waste heat recovery within the source-grid-load-storage integration scenario.

[0318]

[0319] In this formula: C H，ui P represents the unit initial investment cost of hydrogen energy storage in the source-grid-load-storage integration scenario; H，c Indicates the scale of hydrogen energy storage within the source-grid-load-storage integration scenario;

[0320] C H，ma Represents the operation and maintenance cost of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0321] C H，di Represents the scrapping cost of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0322] C H，re Demonstrate residual value recovery of hydrogen energy storage in the integrated source-grid-load-storage scenario;

[0323] C H，ch Indicates the charging cost of hydrogen energy storage in the source-grid-load-storage integration scenario;

[0324] C H，re Represents the unit renewal replacement cost of hydrogen energy storage in the source-grid-load-storage integration scenario;

[0325] P H，re It represents the unit renewal and replacement scale of hydrogen energy storage within the integrated source-grid-load-storage scenario.

[0326] C O =C O,s +C O,f +C O,in

[0327] In this formula: CO,s Represents the backup capacity cost of the external power grid in the source-grid-load-storage integration scenario;

[0328] C O,f Represents the frequency regulation cost of the external power grid in the source-grid-load-storage integration scenario;

[0329] C O,in Represents the inertia cost of the external power grid in the source-grid-load-storage integration scenario.

[0330] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

[0331] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. An electric-thermal-hydrogen energy storage configuration method for improving the integrated regulation capability of source, grid, load and storage, characterized in that: The following steps are involved: Step (1): Based on the internal power supply, load and energy storage of the source-grid-load-storage integration, and with power balance and electricity balance as constraint targets, an electrochemical energy storage model, a thermal energy storage model and a hydrogen energy storage model are established; Step (2): Based on step (1), an internal regulation capability model of the source-grid-load-storage integration is established based on the internal power source, load and energy storage production sequence of the source-grid-load-storage integration; Step (3): Based on step (2), a two-layer optimization model for the optimal configuration of internal electricity-heat-hydrogen energy storage in the integrated source-grid-load-storage system is established.

2. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 1, characterized in that: The constraint model of power balance in step (1) is: P s (t)+P G (t)+P E (t)+P C (t)+P H (t)≥P L (t) Where P s (t) represents the photovoltaic power generation power of the photovoltaic power generation inside the source-grid-load-storage integration scenario at time t; P G (t) represents the wind power generation power of the internal wind power generation in the source-grid-load-storage integration scenario at time t; P E (t) represents the power that the electrochemical energy storage device can release or absorb at time t in the source-grid-load-storage integration scenario; P C (t) represents the power of the internal heat storage device in the source-grid-load-storage integration scenario after the heat storage device releases heat to do work at time t; P H (t) represents the power that can be released by the hydrogen energy device in the source-grid-load-storage integration scenario at time t; P L (t) represents the power absorbed by the load at time t; The power balance constraint model in step (1) is: E s (t)+E G (t)+E E (t)+E C (t)+E H (t)≥E L (t) E s (t) represents the amount of electricity generated by photovoltaic power generation in the source-grid-load-storage integration scenario at time t; E G (t) represents the amount of electricity generated by wind power generation in the source-grid-load-storage integration scenario at time t; E E (t) represents the amount of electricity released or absorbed by the internal electrochemical energy storage at time t in the source-grid-load-storage integration scenario; E C (t) represents the amount of electricity released or absorbed by the internal thermal energy storage device in the source-grid-load-storage integration scenario at time t; E H (t) represents the amount of electricity released or absorbed by the internal hydrogen energy storage device in the source-grid-load-storage integration scenario at time t; E L (t) represents the amount of electricity absorbed by the internal load in the source-grid-load-storage integration scenario at time t.

3. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 1, characterized in that: The electrochemical energy storage model in step (1) is: P ch,E represents the charging power of electrochemical energy storage at time t; η ch Indicates the charging efficiency of electrochemical energy storage; P di,E represents the discharge power of electrochemical energy storage at time t; η di Indicates the discharge efficiency of electrochemical energy storage; S OC,E Indicates the state of charge of electrochemical energy storage; E ra,E Indicates the rated capacity of electrochemical energy storage.

4. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 1, characterized in that: The thermal energy storage model in step (1) is: Q C，ab It represents the total heat absorbed by the internal heat storage medium in the source-grid-load-storage integration scenario at time t; Q M It represents the heat absorbed by the internal heat storage medium of the source-grid-load-storage integration scenario at time t; Q H Indicates the heat released at time t when the internal hydrogen energy storage device in the source-grid-load-storage integration scenario does work; η H Indicates the efficiency of storing heat generated by the internal hydrogen energy storage device after work in the source-grid-load-storage integration scenario in the heat storage medium; Q L It represents the heat released by the internal load in the source-grid-load-storage integration scenario at time t; η L It indicates the efficiency of storing the heat generated by the internal load after work in the source-grid-load-storage integration scenario in the heat storage medium; P S,C Indicates the abandoned power of photovoltaic power generation in the source-grid-load-storage integration scenario; P G,C Indicates the abandoned power of wind power generation in the source-grid-load-storage integration scenario; P O Indicates the input power of the external power grid in the source-grid-load-storage integration scenario; M M Indicates the quality of heat storage medium in the source-grid-load-storage integration scenario; C M Indicates the specific heat of the heat storage medium in the source-grid-load-storage integration scenario; ΔT represents the heat absorption time of the heat storage medium in the source-grid-load-storage integration scenario; Q C，re Indicates the total amount of heat that can be released by the internal heat storage medium in the source-grid-load-storage integration scenario; η C It represents the efficiency of the internal heat storage medium in the source-grid-load-storage integration scenario.

5. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 1, characterized in that: The hydrogen energy storage model in step (1) is: Where: Q ht Indicates the hydrogen storage capacity of the internal hydrogen storage tank in the source-grid-load-storage integration scenario; Q ht,b Indicates the original hydrogen storage capacity of the internal hydrogen storage tank in the source-grid-load-storage integration scenario; ρ el Indicates the electric energy consumed by the internal alkaline cell electrolyzer to produce one kg of hydrogen in the source-grid-load-storage integration scenario; n hy is the conversion efficiency of the alkaline cell electrolyzer; n el is the calorific value constant of hydrogen; P H,di Indicates the power of hydrogen power generation in the source-grid-load-storage integration scenario; p fc Indicates the amount of hydrogen consumed by hydrogen power generation in the source-grid-load-storage integration scenario; η fc Indicates the hydrogen conversion efficiency of hydrogen power generation; η ht Indicates the efficiency of the hydrogen storage tank.

6. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 1, characterized in that: The source-grid-load-storage integrated internal regulation capability model in step (2) includes a load regulation capability model and a power source-energy storage regulation capability model.

7. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 6, characterized in that: The load regulation capability model is: It represents the minimum power absorbed at time t in the source-grid-load-storage integration scenario; P L Represents the power absorbed at time t in the source-grid-load-storage integration scenario; It represents the maximum power absorbed at time t in the source-grid-load-storage integration scenario; Indicates the load that can be interrupted at time t in the source-grid-load-storage integration scenario; Indicates the minimum time of interruption of load within the source-grid-load-storage integration scenario; Indicates the interruption time of a certain type of interruptible load in the source-grid-load-storage integration scenario; Indicates the total time of interruption of the interruptible load in the source-grid-load-storage integration scenario; Indicates the interruption time of various interruptible loads in the source-grid-load-storage integration scenario; It represents the minimum daily output of products in the source-grid-load-storage integration scenario; Y P It represents the daily production value of products in the source-grid-load-storage integration scenario; It represents the maximum daily output of products within the source-grid-load-storage integration scenario.

8. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 6, characterized in that: The power supply-energy storage regulation capability model includes an upward regulation capability model and a downward regulation capability model; The upward capacity adjustment model is: P up Indicates that the internal power supply-energy storage in the source-grid-load-storage integration scenario adjusts the power upward; q represents the heat consumption rate of internal heat utilization power generation in the source-grid-load-storage integration scenario; η g Indicates the efficiency of internal heat utilization for power generation in the source-grid-load-storage integration scenario; The downward capacity adjustment model is: P down Indicates that the internal power supply-energy storage in the source-grid-load-storage integration scenario adjusts power downward.

9. The electric-thermal-hydrogen energy storage configuration method for improving the source-grid-load-storage integrated regulation capability according to claim 1, characterized in that: The double-layer optimization model in step (3) comprises an upper optimization model of electric-thermal-hydrogen energy storage and a lower optimization model of electric-thermal-hydrogen energy storage, wherein the upper optimization model of electric-thermal-hydrogen energy storage is established with the goal of optimizing the internal regulation capability of the source-grid-load-storage integration, and the lower optimization model of electric-thermal-hydrogen energy storage is established with the goal of optimizing the overall economic efficiency of the source-grid-load-storage integration; Upper-level optimization model of electric-thermal-hydrogen energy storage: MaxP al =P s,up +P s,down +P L P al Indicates the maximum regulation capacity within the source-grid-load-storage integration scenario; The upper optimization model sets constraints: P s (t)+P G (t)+P E (t)+P C (t)+P H (t)≥P L (t) P S,C (t)+P G,C (t)≥0 E s (t)+E G (t)+E E (t)+E C (t)+E H (t)≥E L (t) E S,C (t)+E G,C (t)≥0 P O (t)≥0 The underlying optimization model for electric-thermal-hydrogen energy storage is: MinC al =C S +C G +C E +C R +C H +C O C E，ch =C S，C +C S，G +C S，OP C O =C O,s +C O,f +C O,in Where: C al Represents the minimum cost within the source-grid-load-storage integration scenario; C S Represents the cost of photovoltaic power generation within the source-grid-load-storage integration scenario; C G Represents the cost of wind power generation in the source-grid-load-storage integration scenario; C E Represents the cost of electrochemical energy storage in the source-grid-load-storage integration scenario; C R Indicates the cost of thermal energy storage in the source-grid-load-storage integration scenario; C H Indicates the cost of hydrogen energy storage in the source-grid-load-storage integration scenario; C O Represents the cost of external regulation capability in the source-grid-load-storage integration scenario; C S，ui P represents the unit initial investment cost of photovoltaic power generation in the source-grid-load-storage integration scenario; S，c Indicates the installed capacity of photovoltaic power generation in the source-grid-load-storage integration scenario; C S，ma Represents the operation and maintenance cost of photovoltaic power generation in the source-grid-load-storage integration scenario; C S，di Represents the scrapping cost of photovoltaic power generation in the source-grid-load-storage integration scenario; C S，re Indicates the residual value recovery of photovoltaic power generation within the source-grid-load-storage integration scenario; C S，re P represents the unit replacement cost of photovoltaic power generation in the source-grid-load-storage integration scenario; S，re represents the unit renewal replacement scale of photovoltaic power generation in the source-grid-load-storage integration scenario; C G，ui represents the unit initial investment cost of wind power generation in the source-grid-load-storage integration scenario; P G，c Indicates the installed capacity of wind power generation in the source-grid-load-storage integration scenario; C G，ma Represents the operation and maintenance cost of wind power generation in the source-grid-load-storage integration scenario; C G，di Represents the scrapping cost of wind power generation in the source-grid-load-storage integration scenario; C G，re It represents the residual value recovery of wind power generation in the source-grid-load-storage integration scenario; C G，re P represents the unit replacement cost of wind power generation in the source-grid-load-storage integration scenario; G，re represents the unit renewal replacement scale of wind power generation in the source-grid-load-storage integration scenario; C E，ui represents the unit initial investment cost of electrochemical energy storage in the source-grid-load-storage integration scenario; P E，c Indicates the installed capacity of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，ma Represents the operation and maintenance cost of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，di Represents the scrapping cost of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，re Represents the residual value recovery of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，ch Represents the charging cost of electrochemical energy storage in the source-grid-load-storage integration scenario; C E，re P represents the unit renewal replacement cost of electrochemical energy storage in the source-grid-load-storage integration scenario; E，re represents the unit renewal replacement scale of electrochemical energy storage in the source-grid-load-storage integration scenario; C S，C Represents the cost of power abandonment of photovoltaic power generation in the source-grid-load-storage integration scenario; C S，G Represents the cost of curtailed power generation in the integrated source-grid-load-storage scenario; C S，OP Indicates the basic electricity price cost of external electricity purchase in the source-grid-load-storage integration scenario; C R，ui Represents the unit initial investment cost of internal thermal energy storage in the source-grid-load-storage integration scenario; P R，c Indicates the scale of internal thermal energy storage in the source-grid-load-storage integration scenario; C R，ma Represents the operation and maintenance cost of internal thermal energy storage in the source-grid-load-storage integration scenario; C R，di Represents the scrapping cost of internal thermal energy storage in the source-grid-load-storage integration scenario; C R，re Demonstrate residual value recovery of internal thermal energy storage in source-grid-load-storage integration scenario; P R，c Indicates the unit renewal replacement scale of internal thermal energy storage in the source-grid-load-storage integration scenario; C R，ch Indicates the charging cost of thermal energy storage in the source-grid-load-storage integration scenario; C R，re Represents the unit renewal replacement cost of internal thermal energy storage in the source-grid-load-storage integration scenario; P R，re Indicates the unit renewal replacement scale of internal thermal energy storage in the source-grid-load-storage integration scenario; C R，wh represents the unit initial investment cost of waste heat recovery in the source-grid-load-storage integration scenario; P R，ch Indicates the scale of waste heat recovery within the source-grid-load-storage integration scenario; C H，ui Represents the unit initial investment cost of hydrogen energy storage in the integrated source-grid-load-storage scenario; P H，c Indicates the scale of hydrogen energy storage within the source-grid-load-storage integration scenario; C H，ma Represents the operation and maintenance cost of hydrogen energy storage in the integrated source-grid-load-storage scenario; C H，di Represents the scrapping cost of hydrogen energy storage in the integrated source-grid-load-storage scenario; C H，re Demonstrate residual value recovery of hydrogen energy storage in the integrated source-grid-load-storage scenario; C H，ch Indicates the charging cost of hydrogen energy storage in the source-grid-load-storage integration scenario; C H，re Represents the unit renewal replacement cost of hydrogen energy storage in the source-grid-load-storage integration scenario; P H，re Indicates the unit renewal and replacement scale of hydrogen energy storage within the source-grid-load-storage integration scenario; C O,s Represents the backup capacity cost of the external power grid in the source-grid-load-storage integration scenario; C O,f Represents the frequency regulation cost of the external power grid in the source-grid-load-storage integration scenario; C O,in Represents the inertia cost of the external power grid in the source-grid-load-storage integration scenario.

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