Compressed air energy storage compression side stability expansion method and device coupled with electrochemical energy storage

Abstract

The invention relates to the technical field of novel energy, in particular to a compressed air energy storage compression side stability extension method and device coupled with electrochemical energy storage, and the method comprises the steps: building a power grid day-ahead operation model of a compressed air energy storage system coupled with electrochemical energy storage, the compressed air energy storage system comprising the coupled electrochemical energy storage comprises electrochemical energy storage and compressed air energy storage; converting the day-ahead operation model of the power grid into a mixed integer linear programming problem; and solving a mixed integer linear programming problem to obtain a day-ahead operation plan of the hybrid energy storage power station. Therefore, the problem that in a novel double-high power system, the narrow input power range of the compressor cannot meet the flexibility requirement of large-scale new energy grid connection is solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technologies, and in particular to a method and device for stabilizing the compression side of compressed air energy storage coupled with electrochemical energy storage. Background Art

[0002] In recent years, in response to the increasingly severe energy crisis and environmental problems, new energy sources, mainly wind power and photovoltaics, have developed rapidly. Because new energy has a very strong volatility, it has brought great challenges to the consumption of new energy and the safe and stable operation of the power system. As one of the main solutions, energy storage technology has developed rapidly. Among various energy storage technology routes, compressed air energy storage has become the most likely large-scale energy storage form in the future because of its large capacity, low unit capacity price, and flexible configuration. The interface between compressed air energy storage and the power grid is the compressor and turbine, but because the operating range of the compressor is narrow, surge and other adverse conditions will occur under low power conditions, which will lead to reduced efficiency and even safety accidents. In the new power system with "double highs", the narrow input power range cannot meet the flexibility required for large-scale new energy grid connection.

[0003] In view of the above analysis, how to expand the operating range of the energy storage side of the compressed air energy storage system to meet the flexibility requirements of the new power system for energy storage is an urgent problem to be solved; therefore, it is necessary to propose a compressed air energy storage compression side stabilization method coupled with electrochemical energy storage. Summary of the invention

[0004] The present invention provides a method and device for stabilizing the compression side of compressed air energy storage coupled with electrochemical energy storage, so as to solve the problem that in a new power system presenting "double highs", the narrow input power range of the compressor cannot meet the flexibility requirements of large-scale new energy grid connection.

[0005] The first aspect of the present invention provides a method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage, comprising the following steps:

[0006] Establish a day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage; transform the day-ahead operation model of the power grid into a mixed integer linear programming problem; solve the mixed integer linear programming problem to obtain a day-ahead operation plan of a hybrid energy storage power station.

[0007] Optionally, the step of establishing a day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage comprises:

[0008] Construct the compressed air energy storage system including coupled electrochemical energy storage, wherein the compressed air energy storage system including coupled electrochemical energy storage includes electrochemical energy storage and compressed air energy storage; plan the electrochemical energy storage to receive power from new energy or the power grid under charging conditions, and supply the compressed air energy storage or the power grid under power generation conditions; plan the compressed air energy storage to receive power from the electrochemical energy storage or the new energy or the power grid to supplement compressed air and high-temperature heat transfer oil under charging conditions, and use compressed air and high-temperature heat transfer oil to drive a turbine to generate electricity and supply the power grid under power generation conditions; construct a planned day-ahead operation model of the power grid including the compressed air energy storage system coupled with electrochemical energy storage.

[0009] Optionally, the constructing of a planned day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage comprises:

[0010] The power of the new energy output and load of the planned compressed air energy storage system including coupled electrochemical energy storage is predicted to obtain the new energy output and load forecast data for the next day before the day; based on the new energy output and load forecast data for the second day, with the goal of minimizing the amount of new energy discarded, the state of charge constraints of compressed air energy storage and electrochemical energy storage, power balance constraints, and upper and lower bounds of each physical quantity are comprehensively considered to construct the day-ahead operation model of the power grid.

[0011] Optionally, converting the power grid day-ahead operation model into a mixed integer linear programming problem includes:

[0012] The nonlinear terms in the day-ahead operation model of the power grid are linearized to obtain the mixed integer linear programming problem.

[0013] Optionally, solving the mixed integer linear programming problem to obtain a day-ahead operation plan of the hybrid energy storage power station includes:

[0014] The mixed integer linear programming problem is decomposed into sub-problems and a main problem by using the Benders decomposition method; the sub-problems and the main problem are solved to obtain a day-ahead operation plan of the hybrid energy storage power station.

[0015] Optionally, solving the sub-problems and the main problem to obtain a day-ahead operation plan of the hybrid energy storage power station includes:

[0016] Solve the lower bound initial value of the main problem; solve the upper bound value of the subproblem; determine whether the upper bound value and the lower bound initial value coincide with each other; if the upper bound value and the lower bound initial value coincide with each other, obtain the day-ahead operation plan of the hybrid energy storage power station, otherwise add constraints to the main problem to update the lower bound initial value, iterate the solution process until the upper bound value and the lower bound initial value coincide with each other, and obtain the day-ahead operation plan of the hybrid energy storage power station.

[0017] The second aspect of the present invention provides a compressed air energy storage compression side stabilization device coupled with electrochemical energy storage, comprising:

[0018] A construction module is used to establish a day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage; a conversion module is used to convert the day-ahead operation model of the power grid into a mixed integer linear programming problem; and a solution module is used to solve the mixed integer linear programming problem to obtain a day-ahead operation plan of a hybrid energy storage power station.

[0019] An embodiment of the third aspect of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the compressed air energy storage compression side stabilization method coupled with electrochemical energy storage as described in the above embodiment.

[0020] A fourth aspect of the present invention provides a computer program product, which, when executed by a processor, implements the above-mentioned method for stabilizing the compression side of compressed air energy storage coupled with electrochemical energy storage.

[0021] A fifth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method for stabilizing the compression side of compressed air energy storage coupled with electrochemical energy storage.

[0022] The compressed air energy storage compression side stabilization method and device coupled with electrochemical energy storage proposed in the embodiment of the present invention can effectively expand the operating range of the energy storage side of the compressed air energy storage system, thereby avoiding the low-efficiency operating range, reducing the occurrence of adverse operating conditions such as surge, ensuring that the efficiency of the power system will not decrease, and meeting the flexibility requirements of large-scale new energy grid connection requirements.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A flow chart of a method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage provided by an embodiment of the present invention;

[0026] Figure 2 A grid structure diagram of a compressed air energy storage system including coupled electrochemical energy storage provided by an embodiment of the present invention;

[0027] Figure 3 A block diagram of a compressed air energy storage compression side stabilization device coupled with electrochemical energy storage provided in an embodiment of the present invention.

[0028] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following describes the compression side stabilization method and device of compressed air energy storage coupled with electrochemical energy storage according to an embodiment of the present invention with reference to the accompanying drawings.

[0031] Figure 1 A schematic flow chart of a method for stabilizing the compression side of compressed air energy storage coupled with electrochemical energy storage provided in an embodiment of the present invention.

[0032] like Figure 1 As shown, the compressed air energy storage compression side stabilization method coupled with electrochemical energy storage comprises the following steps:

[0033] In step S101, a day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage is established.

[0034] In some embodiments, establishing a day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage includes:

[0035] Constructing a compressed air energy storage system including coupled electrochemical energy storage, wherein the compressed air energy storage system including coupled electrochemical energy storage includes electrochemical energy storage and compressed air energy storage;

[0036] Planning electrochemical energy storage to receive power from renewable energy or the grid under charging conditions, and supply compressed air energy storage or the grid under power generation conditions;

[0037] Plan compressed air energy storage to receive power from electrochemical energy storage or new energy or the power grid to supplement compressed air and high-temperature thermal oil under charging conditions, and use compressed air and high-temperature thermal oil to drive turbines to generate electricity and supply the power grid under power generation conditions;

[0038] Construct a day-ahead operation model of the planned grid including a compressed air energy storage system coupled with electrochemical energy storage.

[0039] In some embodiments, constructing a planned day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage includes:

[0040] The power of the planned compressed air energy storage system including coupled electrochemical energy storage and the power of the load are predicted to obtain the new energy output and load forecast data for the next day.

[0041] Based on the new energy output and load forecast data for the next day, with the goal of minimizing the amount of new energy discarded, the charge state constraints, power balance constraints, and upper and lower bounds of each physical quantity of compressed air energy storage and electrochemical energy storage are comprehensively considered to construct a day-ahead operation model of the power grid.

[0042] Specifically, Figure 2 As shown, the compressed air energy storage system including coupled electrochemical energy storage proposed in the embodiment of the present invention is composed of two parts: electrochemical energy storage and compressed air energy storage. One part of the electrochemical energy storage is planned as follows: receiving power from new energy or the power grid to increase its own energy under charging conditions, and also needs to supply compressed air energy storage or the power grid under power generation conditions; the other part of the compressed air energy storage is planned as follows: receiving power from electrochemical energy storage or new energy or the power grid to supplement compressed air and high-temperature heat transfer oil under charging conditions, and also needs to use compressed air and high-temperature heat transfer oil to drive the turbine to generate electricity and supply the power grid under power generation conditions. In other words, the compressed air energy storage system including coupled electrochemical energy storage proposed in the embodiment of the present invention can charge the electrochemical energy storage and the compressed air energy storage by valley electricity. Because the compression side of the compressed air energy storage has a considerable power limit, the electrochemical energy storage is charged first when the remaining power of the new energy is small; when it is large, the compressed air energy storage is charged together with the electrochemical energy storage; when it is very large, the compressed air energy storage is directly charged, and if there is a surplus, the electrochemical energy storage is charged at the same time.

[0043] Furthermore, the compressed air energy storage system including coupled electrochemical energy storage can be quantitatively described as follows: Assuming that the rated energy release power of the electrochemical energy storage is The rated input power of the compressor is New energy output is P n , the load is P load , the output of the traditional unit is P th , when the output of new energy is large, the power required to be stored by the energy storage system is:

[0044] P in =P n -P load +P th (1)

[0045] Because the feasible region of compressed air energy storage on the compression side is narrow, it is necessary to determine the system storage power P in Rated power of compressor relationship.

[0046] if (Generally, the safe charging power limit of a compressor is 85% of the rated power), then all the charging power is used to charge the electrochemical energy storage; if (Generally, the upper limit of the safe charging power of the compressor is 110% of the rated power), the grid and the electrochemical energy storage jointly charge the compressed air energy storage; if The power grid charges the electrochemical energy storage and compressed air energy storage at the same time.

[0047] Furthermore, the power of the new energy output and load of the compressed air energy storage system coupled with electrochemical energy storage after planning is predicted, so as to obtain the new energy output and load forecast data for the next day. Then, based on the new energy output and load forecast data for the next day, with the goal of minimizing the amount of new energy discarded, the state of charge constraints of compressed air energy storage and electrochemical energy storage, power balance constraints, and upper and lower bounds of each physical quantity are comprehensively considered to establish a hybrid energy storage power station operation plan model (i.e., the power grid day-ahead operation model).

[0048] In step S102, the day-ahead operation model of the power grid is converted into a mixed integer linear programming problem.

[0049] In some embodiments, the day-ahead operation model of the power grid is converted into a mixed integer linear programming problem, including:

[0050] The nonlinear terms in the day-ahead operation model of the power grid are linearized to obtain a mixed integer linear programming problem.

[0051] In the actual implementation process, since the day-ahead operation model of the power grid is a mixed integer linear programming problem, it is necessary to linearize the nonlinear terms therein, that is, to convert the entire model into a mixed integer linear programming model.

[0052] The specific conversion process is as follows:

[0053]

[0054] Objective function formula (2) The optimization goal of the day-ahead operation model of the power grid is to minimize the amount of renewable energy discarded by the entire system; P t currepresents the amount of renewable energy abandoned at time t; constraint formula (3) is power balance, which limits the power generation and power consumption of the entire power grid to be balanced at time t; P t n ,P t th ,P t load They are respectively the power generation and charging power of compressed air energy storage at time t, the power generation and charging power of electrochemical energy storage at time t, the output of new energy at time t, the output of thermal power unit at time t, and the load at time t; η dis ,η ch are the power generation efficiency and charging efficiency of electrochemical energy storage, respectively; constraint formulas (4) and (5) define the upper and lower limits of the charging and discharging power of compressed air energy storage and the charging and discharging power of electrochemical energy storage, respectively; They are the lower and upper limits of compressed air energy storage power generation and charging power respectively; They are the lower and upper limits of electrochemical energy storage power generation and charging power respectively; are state variables that represent the power generation and charging of compressed air energy storage at time t, and the power generation and charging of electrochemical energy storage at time t, respectively. They are Boolean variables. When they are 1, they represent that the two energy storages are in the corresponding working conditions, and when they are 0, they represent that the two energy storages are not in the corresponding working conditions. Constraint formulas (6), (7) and (8) constrain the changes in the energy storage conditions of compressed air energy storage and electrochemical energy storage; They represent the heat storage and gas storage state of compressed air energy storage and the charge state of electrochemical energy storage at time t respectively; Γ ch ,Γ dis are functions of the effects of charging and discharging power on the compressed air energy storage and heat storage level, which can be piecewise linearized into A linear function of Φ ch ,Φ dis are functions of the effects of charging and discharging power on the compressed air energy storage level, which can be piecewise linearized into The constraint formula (9) constrains the upper and lower limits of the heat storage, gas storage, and charge levels in the hybrid energy storage system; They are the upper and lower limits of compressed air energy storage, heat storage and gas storage levels, and the upper and lower limits of electrochemical energy storage charge levels; constraint formula (10) restricts compressed air energy storage and electrochemical energy storage from being in the condition of both charging and generating electricity at the same time.

[0055] In step S103, a mixed integer linear programming problem is solved to obtain a day-ahead operation plan of the hybrid energy storage power station.

[0056] In some embodiments, solving a mixed integer linear programming problem to obtain a day-ahead operation plan of a hybrid energy storage power station includes:

[0057] The mixed integer linear programming problem is decomposed into sub-problems and main problem by using Benders decomposition method;

[0058] Solve the subproblems and the main problem to obtain the day-ahead operation plan of the hybrid energy storage power station.

[0059] In some embodiments, solving the sub-problems and the main problem to obtain a day-ahead operation plan of the hybrid energy storage power station includes:

[0060] Find the lower bound initial value for solving the main problem;

[0061] Find the upper bound of the subproblem;

[0062] Determine whether the upper bound value and the lower bound initial value coincide;

[0063] If the upper bound value and the lower bound initial value coincide, the day-ahead operation plan of the hybrid energy storage power station is obtained. Otherwise, constraints are added to the main problem to update the lower bound initial value, and the solution process is iterated until the upper bound value and the lower bound initial value coincide, and the day-ahead operation plan of the hybrid energy storage power station is obtained.

[0064] In the actual implementation process, the Benders decomposition method is used to decompose the above mixed integer linear programming problem into sub-problems and a main problem. By continuously generating feasible cuts to reduce the feasible domain and reduce the distance between the upper and lower bounds, the day-ahead operation plan of the hybrid energy storage power station is finally obtained.

[0065] The above-mentioned grid day-ahead operation model including the compressed air energy storage system coupled with electrochemical energy storage is a mixed integer linear programming model, which can be written in the following lumped form:

[0066] min1 T P t cur (11)

[0067] stAy≥b(12)

[0068] Ex+Fy≥h(13)

[0069] The objective function formula (11) is consistent with the objective function formula (2); 1 T represents the transpose of a column vector whose elements are all 1. Formula (12) corresponds to constraint formula (10); A, b are the corresponding coefficients in constraint formula (10). Formula (13) corresponds to constraint formula (3)-(9); E, F, h are the corresponding coefficients in formula (3)-(9). According to the Benders decomposition method, this problem can be decomposed into the following sub-problems and the main problem.

[0070] The main problem is:

[0071] minz lower (14)

[0072] stz lower ≥0,Ay≥b(15)

[0073] The sub-problems are:

[0074] min1 T P t cur (16)

[0075]

[0076] in, The optimal solution to the main problem is obtained.

[0077] Furthermore, first solve the main problem to obtain the initial value of the lower bound, and then solve the subproblem to obtain the upper bound. If the upper and lower bounds coincide, then convergence occurs. At this time, the optimal solution is the optimal solution of the original problem. If they do not coincide, add the following constraints to the main problem:

[0078]

[0079] in, is the optimal solution to the dual problem of the subproblem; then solve the main problem and update the lower bound. Repeat the above two steps to continuously generate feasible cuts to reduce the feasible domain and reduce the distance between the upper and lower bounds until the upper and lower bounds are equal, and end the cycle to obtain the optimal solution of the above model, that is, to achieve the day-ahead operation plan of the hybrid energy storage power station in the compression side stability domain of the enhanced compressed air energy storage.

[0080] In summary, the compressed air energy storage compression side stabilization method coupled with electrochemical energy storage proposed in an embodiment of the present invention can effectively expand the operating range of the energy storage side of the compressed air energy storage system, thereby avoiding the low-efficiency operating range, reducing the occurrence of adverse operating conditions such as surge, and ensuring that the efficiency of the power system will not decrease, thereby meeting the flexibility requirements of large-scale new energy grid connection requirements.

[0081] Next, the compressed air energy storage compression side stabilization device coupled with electrochemical energy storage proposed in accordance with an embodiment of the present invention will be described with reference to the accompanying drawings.

[0082] Figure 3 It is a block diagram of a compressed air energy storage compression side stabilization device coupled with electrochemical energy storage according to an embodiment of the present invention.

[0083] like Figure 3 As shown, the compressed air energy storage compression side stabilization device 30 coupled with electrochemical energy storage includes: a construction module 301, a conversion module 302 and a solution module 303.

[0084] Among them, the construction module 301 is used to establish a day-ahead operation model of the power grid including a compressed air energy storage system coupled with electrochemical energy storage. The conversion module 302 is used to convert the day-ahead operation model of the power grid into a mixed integer linear programming problem. The solution module 303 is used to solve the mixed integer linear programming problem to obtain the day-ahead operation plan of the hybrid energy storage power station.

[0085] In some embodiments, building block 301 includes:

[0086] A first construction unit is used to construct a compressed air energy storage system including coupled electrochemical energy storage, wherein the compressed air energy storage system including coupled electrochemical energy storage includes electrochemical energy storage and compressed air energy storage;

[0087] The first planning unit is used to plan the electrochemical energy storage to receive power from new energy or the grid under the charging condition and to supply compressed air energy storage or the grid under the power generation condition;

[0088] The second planning unit is used to plan the compressed air energy storage to receive the power of electrochemical energy storage or new energy or power grid to supplement compressed air and high-temperature heat transfer oil under charging conditions, and to use compressed air and high-temperature heat transfer oil to drive the turbine to generate electricity and supply the power grid under power generation conditions;

[0089] The second construction unit constructs a planned day-ahead operation model of the power grid including a compressed air energy storage system coupled with electrochemical energy storage.

[0090] In some embodiments, the second building block comprises:

[0091] A prediction subunit is used to predict the power of the new energy output and load of the planned compressed air energy storage system including coupled electrochemical energy storage, so as to obtain the new energy output and load forecast data for the next day in advance;

[0092] Construct a subunit to build a day-ahead operation model of the power grid based on the next day's renewable energy output and load forecast data, with the goal of minimizing the amount of renewable energy discarded. Consider the state of charge constraints of compressed air energy storage and electrochemical energy storage, power balance constraints, and upper and lower bounds of each physical quantity.

[0093] In some embodiments, the conversion module 302 includes:

[0094] The nonlinear terms in the day-ahead operation model of the power grid are linearized to obtain a mixed integer linear programming problem.

[0095] In some embodiments, the solution module 303 includes:

[0096] A decomposition unit, used to decompose the mixed integer linear programming problem into sub-problems and a main problem using the Benders decomposition method;

[0097] The solving unit is used to solve the sub-problems and the main problem to obtain the day-ahead operation plan of the hybrid energy storage power station.

[0098] In some embodiments, the solving unit includes:

[0099] The solving subunit is used to solve the lower bound initial value of the main problem and the upper bound value of the subproblem;

[0100] The judgment unit is used to judge whether the upper bound value and the lower bound initial value coincide with each other. If the upper bound value and the lower bound initial value coincide with each other, the day-ahead operation plan of the hybrid energy storage power station is obtained. Otherwise, constraints are added to the main problem to update the lower bound initial value, and the solution process is iterated until the upper bound value and the lower bound initial value coincide with each other, thereby obtaining the day-ahead operation plan of the hybrid energy storage power station.

[0101] It should be noted that the aforementioned explanation of the embodiment of the compression side stabilization method of the compressed air energy storage coupled with electrochemical energy storage is also applicable to the compression side stabilization device of the compressed air energy storage coupled with electrochemical energy storage of this embodiment, and will not be repeated here.

[0102] The compressed air energy storage compression side stabilization device coupled with electrochemical energy storage proposed in an embodiment of the present invention can effectively expand the operating range of the energy storage side of the compressed air energy storage system, thereby avoiding low-efficiency operating ranges, reducing the occurrence of adverse operating conditions such as surge, ensuring that the efficiency of the power system will not decrease, and meeting the flexibility requirements of large-scale new energy grid connection requirements.

[0103] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. The electronic device may include:

[0104] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0105] When the processor 402 executes the program, the compressed air energy storage compression side stabilization method coupled with electrochemical energy storage provided in the above-mentioned embodiment is implemented.

[0106] Furthermore, the electronic device further comprises:

[0107] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0108] The memory 401 is used to store computer programs that can be executed on the processor 402 .

[0109] The memory 401 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0110] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0111] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0112] The processor 402 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0113] An embodiment of the present invention also provides a computer program product, which, when executed by a processor, implements the above-mentioned compressed air energy storage compression side stabilization method coupled with electrochemical energy storage.

[0114] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned compressed air energy storage compression side stabilization method coupled with electrochemical energy storage.

[0115] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0116] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0117] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0118] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0119] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0120] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0121] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0122] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage, characterized in that: The following steps are involved: Establish a day-ahead operation model of the power grid including a compressed air energy storage system coupled with electrochemical energy storage; Converting the power grid day-ahead operation model into a mixed integer linear programming problem; Solve the mixed integer linear programming problem to obtain a day-ahead operation plan for the hybrid energy storage power station.

2. The method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage according to claim 1, characterized in that: The method of establishing a day-ahead operation model of a power grid including a compressed air energy storage system coupled with electrochemical energy storage comprises: Constructing the compressed air energy storage system including coupled electrochemical energy storage, wherein the compressed air energy storage system including coupled electrochemical energy storage includes electrochemical energy storage and compressed air energy storage; Planning the electrochemical energy storage to receive power from new energy or the grid under charging conditions and to supply power to the compressed air energy storage or the grid under power generation conditions; The compressed air energy storage is planned to receive the power of the electrochemical energy storage or the new energy or the power grid to supplement the compressed air and high-temperature heat transfer oil under the charging condition, and to drive the turbine with the compressed air and high-temperature heat transfer oil to generate electricity and supply the power grid under the power generation condition; Construct a day-ahead operation model of the planned grid including a compressed air energy storage system coupled with electrochemical energy storage.

3. The method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage according to claim 2, characterized in that: The planned day-ahead operation model of the power grid including the compressed air energy storage system coupled with electrochemical energy storage comprises: Predicting the power of the new energy output and load of the planned compressed air energy storage system including coupled electrochemical energy storage, so as to obtain the new energy output and load forecast data for the next day; Based on the new energy output and load forecast data of the second day, with the goal of minimizing the amount of new energy discarded, the charge state constraints, power balance constraints, and upper and lower bounds of each physical quantity of compressed air energy storage and electrochemical energy storage are comprehensively considered to construct the day-ahead operation model of the power grid.

4. The method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage according to claim 1, characterized in that: The step of converting the power grid day-ahead operation model into a mixed integer linear programming problem comprises: The nonlinear terms in the day-ahead operation model of the power grid are linearized to obtain the mixed integer linear programming problem.

5. The method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage according to claim 1, characterized in that: The step of solving the mixed integer linear programming problem to obtain a day-ahead operation plan of the hybrid energy storage power station includes: Using Benders decomposition method to decompose the mixed integer linear programming problem into sub-problems and a main problem; The sub-problems and the main problem are solved to obtain a day-ahead operation plan of the hybrid energy storage power station.

6. The method for stabilizing the compressed air energy storage compression side coupled with electrochemical energy storage according to claim 5, characterized in that: The solving of the sub-problems and the main problem to obtain a day-ahead operation plan of the hybrid energy storage power station includes: Finding a lower bound initial value for solving the master problem; Finding an upper bound value for solving the subproblem; Determine whether the upper limit value and the lower limit initial value coincide with each other; If the upper bound value and the lower bound initial value coincide with each other, the day-ahead operation plan of the hybrid energy storage power station is obtained; otherwise, constraints are added to the main problem to update the lower bound initial value, and the solution process is iterated until the upper bound value and the lower bound initial value coincide with each other, thereby obtaining the day-ahead operation plan of the hybrid energy storage power station.

7. A compressed air energy storage compression side stabilization device coupled with electrochemical energy storage, characterized in that it includes: A building block for building a day-ahead operation model of a power grid that includes a compressed air energy storage system coupled with electrochemical energy storage; A conversion module, used for converting the power grid day-ahead operation model into a mixed integer linear programming problem; The solution module is used to solve the mixed integer linear programming problem to obtain a day-ahead operation plan of the hybrid energy storage power station.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the compression side stabilization method of compressed air energy storage coupled with electrochemical energy storage as described in any one of claims 1 to 6.

9. A computer program product, characterized in that When the computer program / instruction is executed by a processor, the compressed air energy storage compression side stabilization method coupled with electrochemical energy storage as described in any one of claims 1-6 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the compression side stabilization method of compressed air energy storage coupled with electrochemical energy storage as described in any one of claims 1-6.

Images