Method, device and equipment for analyzing operation scene of gravity energy storage array system

Abstract

The embodiment of the invention provides an operation scene analysis method, device and equipment for a gravity energy storage array system, and the method comprises the steps: constructing a gravity energy storage array system model; determining the output power of the gravity energy storage units put into operation in the gravity energy storage array system based on the model, and constructing a power difference index between the gravity energy storage units based on the output power; and determining an operation scene of the gravity energy storage array system based on the power demand index of the power grid side, the number of the gravity energy storage units put into operation and the output power, or determining the operation scene of the gravity energy storage array system based on the power demand index, the power difference index, the number of the gravity energy storage units put into operation and the output power. According to the technical scheme provided by the embodiment of the invention, the operation scene of the gravity energy storage array system can be accurately divided to match the corresponding control strategy, and the operation loss caused by the frequency switching operation state of the gravity energy storage unit can be reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application provides the technical field of power transmission, and particularly relates to a running scene analysis method, device and equipment of a gravity energy storage array system. BACKGROUND

[0002] With the acceleration of the transformation of global energy structure to renewable energy, the high proportion of grid-connected fluctuating power sources such as wind power and photovoltaic power poses a severe challenge to the flexibility of the power system. At present, the installed capacity of renewable energy is large, but its time and space distribution is seriously mismatched with the load demand, resulting in high curtailment rate of wind power and photovoltaic power. Under this background, large-capacity and long-time energy storage technology has become the key support to solve the problem of new energy consumption. In traditional energy storage technology, pumped storage power is limited by geographical conditions and water resources, and lithium battery energy storage faces problems such as high cost, short service life and safety hazards. Therefore, new physical energy storage technology with high safety, long service life, low cost and environmental friendliness has become a research hotspot, among which gravity energy storage stands out with its unique advantages.

[0003] In the research of gravity energy storage, the gravity energy storage array system is a key support technology for peak clipping and valley filling of the power grid and maintaining the safe and stable operation of the power grid system. However, the power demand of the power grid changes in real time, and there is a lack of analysis of the overall running scene of the gravity energy storage array system. Instead, the gravity energy storage array system is controlled by a set of control strategies. When the demand of the power grid side changes, all gravity energy storage units in the gravity energy storage array system need to switch the operating state. Frequent switching of the operating state will cause operating loss. Therefore, how to analyze the scene of the gravity energy storage array system to meet the demand of the power grid side while reducing the operating loss caused by frequent switching of the operating state of the gravity energy storage unit is a problem that needs to be solved by those skilled in the art. SUMMARY

[0004] The running scene analysis method, device and equipment of the gravity energy storage array system provided by the embodiment of the present application can accurately divide the running scene of the gravity energy storage array system to match the corresponding control strategy, and can reduce the operating loss caused by frequent switching of the operating state of the gravity energy storage unit.

[0005] In a first aspect, the embodiment of the present application provides a running scene analysis method of a gravity energy storage array system, comprising:

[0006] constructing a gravity energy storage array system model;

[0007] determining the output power of the gravity energy storage unit put into operation in the gravity energy storage array system based on the gravity energy storage array system model, and constructing a power difference index between the gravity energy storage units based on the output power;

[0008] The operation scenario of the gravity energy storage array system is determined based on a power demand index of the grid side on the gravity energy storage array system, a number of the gravity energy storage units in operation, and the output power, or the operation scenario of the gravity energy storage array system is determined based on the power demand index, the power difference index, the number of the gravity energy storage units in operation, and the output power.

[0009] In a second aspect, an embodiment of the present application provides an operation scenario analysis device of a gravity energy storage array system, including:

[0010] A construction module is configured to construct a gravity energy storage array system model.

[0011] A power difference index determination module is configured to determine output power of gravity energy storage units in operation in the gravity energy storage array system based on the model, and construct a power difference index between the gravity energy storage units based on the output power.

[0012] An operation scenario determination module is configured to determine an operation scenario of the gravity energy storage array system based on a power demand index of the grid side on the gravity energy storage array system, a number of the gravity energy storage units in operation, and the output power, or determine the operation scenario of the gravity energy storage array system based on the power demand index, the power difference index, the number of the gravity energy storage units in operation, and the output power.

[0013] In a third aspect, an embodiment of the present application provides an electronic device including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method provided by the embodiments of the present application.

[0014] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and when the computer program is executed in a computer, the computer is caused to execute the method provided by the embodiments of the present application.

[0015] The technical scheme provided by the embodiment of the application comprises the following steps: constructing a gravity energy storage array system model, determining the output power of the gravity energy storage units in operation based on the model, constructing a power difference index between the gravity energy storage units based on the output power, and determining the operation scenario of the gravity energy storage array system through the power demand index of the grid side of the gravity energy storage array system, the number of the gravity energy storage units in operation, the output power, or in combination with the power difference index, so that the operation scenario can be accurately divided to match the corresponding control strategy. That is, the embodiment of the application determines the operation scenario of the gravity energy storage array system, realizes accurate division of the operation scenario to match the corresponding control strategy, and when the power demand of the grid side changes, the operation scenario corresponding control strategy is used, without the need to switch the operation state of all the gravity energy storage units, so that the operation loss caused by frequent switching of the operation state of the gravity energy storage units is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a flow chart of a method for analyzing the operation scenario of a gravity energy storage array system provided by the embodiment of the application.

[0017] Figure 2 is a flow chart of a method for analyzing the operation scenario of a gravity energy storage array system provided by the embodiment of the application.

[0018] Figure 3 is a block diagram of an apparatus for analyzing the operation scenario of a gravity energy storage array system provided by the embodiment of the application.

[0019] Figure 4 is a structural schematic diagram of an electronic device provided by the embodiment of the application. DETAILED DESCRIPTION

[0020] The application will be further described in detail through the accompanying drawings and specific embodiments.

[0021] Figure 1 is a flow chart of a method for analyzing the operation scenario of a gravity energy storage array system provided by the embodiment of the application, which can be executed by an apparatus for analyzing the operation scenario of a gravity energy storage array system. The apparatus can be realized by software and / or hardware, and can be configured in a computer or other electronic device.

[0022] As shown in Figure 1 , the technical scheme provided by the embodiment of the application comprises the following steps:

[0023] S110: Construct a gravity energy storage array system model.

[0024] In the embodiment, the gravity energy storage array system can be a vertical matrix type gravity energy storage system, and the gravity blocks are lifted or lowered by the elevator car. The gravity energy storage array system is composed of a plurality of gravity energy storage units in parallel. For a single gravity energy storage unit, the working principle is to realize electromechanical energy conversion by driving a synchronous machine with discrete gravity blocks. According to the above principle, the active control link of the kth gravity energy storage unit is constructed, and the gravity energy storage array system model is constructed.

[0025] In an embodiment, the gravity energy storage array system model is constructed based on the following formula:

[0026]

[0027] wherein T i,k is the input mechanical torque of the ith gravity block of the kth gravity energy storage unit; m is the mass of a unit gravity block; g is the acceleration of gravity; v is the gravity block speed; η is the efficiency of converting gravity potential energy into electrical energy; S n,k is the rated capacity of the kth gravity energy storage unit; T m,k is the input mechanical total torque of the kth gravity energy storage unit; P e,k is the output power of the kth gravity energy storage unit; T m_gra,k is the input mechanical torque of the kth gravity energy storage unit; T e,k is the electromagnetic torque of the kth gravity energy storage unit; T j,k is the inertia time constant of the kth gravity energy storage unit, D k is the damping coefficient of the kth gravity energy storage unit; δ k is the power angle of the kth gravity energy storage unit; ω0 is the synchronous speed of the gravity energy storage unit; ω k is the electrical angular velocity of the kth gravity energy storage unit; N block is the number of gravity blocks in a single gravity energy storage unit.

[0028] S120: Determine the output power of each gravity energy storage unit in the gravity energy storage array system based on the model, and construct a power difference index between the gravity energy storage units based on the output power.

[0029] In the embodiment, the running state of the gravity energy storage array system can be evaluated. Specifically, the running state or the exiting running state of each gravity energy storage unit in the gravity energy storage array system is determined, so as to analyze the gravity energy storage units in the running state. The output power of each gravity energy storage unit in the running state can be calculated through the formula of the output power in the model.

[0030] In the embodiment, at the current time, the number of gravity energy storage units in the running state in the gravity energy storage array system can be N gra, the output power of each running gravity energy storage unit can be P gra,1 , P gra , 2, …, P gra,n . Thus, the power difference index between the gravity energy storage units can be constructed.

[0031] In an implementation manner, the power difference index between the gravity energy storage units is constructed based on the output power, comprising:

[0032] The power difference index is constructed based on the following formula:

[0033]

[0034] wherein, P ff,array is the power difference index; N gra is the number of running units in the gravity energy storage array system; P gra,m is the output power of the mth unit; and P gra,n is the output power of the nth gravity energy storage unit.

[0035] S130: determining the operation scenario of the gravity energy storage array system based on the power demand index of the grid side to the gravity energy storage array system, the number of running gravity energy storage units, and the output power, or determining the operation scenario of the gravity energy storage array system based on the power demand index of the grid side to the gravity energy storage array system, the power difference index, the number of running gravity energy storage units, and the output power.

[0036] In the embodiment, the power demand index of the grid side to the gravity energy storage array system can include a time demand index and a power amplitude demand index. Specifically, for the gravity energy storage array system, unlike the fast tracking response characteristic of the electrochemical energy storage, due to the mechanical structure setting of the gravity energy storage array system, the running time of the weight block of each gravity energy storage unit has a fixed time interval, and the timeliness needs to be considered when the gravity energy storage array system meets the power size demand of the grid side. Therefore, the multi-dimensional analysis of the power demand of the grid side can be realized from the two index angles of the power amplitude demand and the time demand.

[0037] In the embodiment, the operation scenario of the gravity energy storage array system can be divided in combination with the operation state of the gravity energy storage array system and the demand of the grid side to the gravity energy storage array system, with the goal of meeting the demand of the grid side as soon as possible and minimizing the loss of the gravity energy storage unit. Specifically, the operation state of each gravity energy storage unit can be obtained through the operation state of the gravity energy storage array system, the running gravity energy storage unit can be determined, and thus the number N graand calculate the output power; determine the operation scenario of the gravity energy storage array system through the number, the output power, the power demand index of the gravity energy storage array system on the grid side, and the power difference index between the gravity energy storage units, or determine the operation scenario of the gravity energy storage array system based on the number, the output power, and the power demand index of the gravity energy storage array system on the grid side.

[0038] The technical scheme provided in the embodiments of the present application can accurately divide the operation scenario to match the corresponding control strategy by constructing a gravity energy storage array system model, determining the output power of the gravity energy storage units in operation based on the model, constructing a power difference index between the gravity energy storage units based on the output power, and determining the operation scenario of the gravity energy storage array system through the power demand index of the gravity energy storage array system on the grid side, the number of gravity energy storage units in operation, and the output power, or in combination with the power difference index. That is, the embodiments of the present application can achieve accurate division of the operation scenario to match the corresponding control strategy by determining the operation scenario of the gravity energy storage array system. When the power demand of the grid side changes, the operation scenario corresponding control strategy is used, without the need to switch the operation state of all gravity energy storage units, thereby reducing the operation loss caused by frequent switching of the operation state of the gravity energy storage units.

[0039] In an implementation manner of the embodiments of the present application, optionally, the operation scenario of the gravity energy storage array system is determined based on the power demand index of the gravity energy storage array system on the grid side, the number of gravity energy storage units in operation, and the output power, including: determining the operation scenario of the gravity energy storage array system based on the power amplitude demand index of the gravity energy storage array system on the grid side, the time demand index, the number of gravity energy storage units in operation, and the output power.

[0040] The operation scenario of the gravity energy storage array system is determined based on the power demand index of the gravity energy storage array system on the grid side, the power difference index, the number of gravity energy storage units in operation, and the output power, including: determining the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation, and the output power.

[0041] In the embodiments, the operation scenario of the gravity energy storage array system can be determined based on the relationship satisfied by the power amplitude demand index, the time demand index, and the number of gravity energy storage units in operation and the output power, or in combination with the power difference index.

[0042] Figure 2 is a flow chart of a method for analyzing the operation scenario of a gravity energy storage array system provided by the embodiments of the present application, as shown inFigure 2 The method comprises the following steps of:

[0043] S210: Constructing a gravity energy storage array system model.

[0044] S220: Determining an output power of a gravity energy storage unit in operation in the gravity energy storage array system based on the model, and constructing a power difference index between the gravity energy storage units based on the output power.

[0045] S230: Determining an operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation and the output power of the grid side, or determining the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the power difference index, the number of the gravity energy storage units in operation and the output power.

[0046] In this embodiment, the determination of the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation and the output power of the grid side can be specifically: determining the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation, the output power of the gravity energy storage units in operation, the time required for a single gravity energy storage unit to put all the heavy blocks and the maximum output power of the single gravity energy storage unit in operation.

[0047] In this embodiment, the determination of the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the power difference index, the number of the gravity energy storage units in operation and the output power can be specifically: determining the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation, the power difference index, the output power of the gravity energy storage units in operation, the time required for a single gravity energy storage unit to put all the heavy blocks and the maximum output power of the single gravity energy storage unit in operation.

[0048] In one embodiment of the present application, the determination of the operation scenario of the gravity energy storage array system based on the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation and the output power of the grid side comprises: if the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation and the output power satisfy the following formula, determining the scenario corresponding to the following formula as the operation scenario of the gravity energy storage array system:

[0049]

[0050] wherein P grid is the power amplitude demand index; T grid is the time demand index; N gra,h is half of the number of the gravity energy storage units in operation; P gra,max is the maximum output power of a single gravity energy storage unit; AT gra is the time required for a single gravity energy storage unit to put all the weights in operation; N gra is the number of the gravity energy storage units in operation. If the power amplitude demand index and the time demand index of the grid side to the gravity energy storage array system fall within the above interval, the gravity energy storage array system is set as the operation scenario 1.

[0051] In an embodiment of the present application, the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index, the time demand index, the power difference index, the number of the gravity energy storage units in operation, and the output power, including: if the power amplitude demand index, the time demand index, the power difference index, the number of the gravity energy storage units in operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operation scenario of the gravity energy storage array system:

[0052]

[0053] wherein P grid is the power amplitude demand index; T grid is the time demand index; P block,single is the power change amount corresponding to a single weight; P gra,max is the maximum output power of a single gravity energy storage unit in operation; P gra,i is the output power of the i-th gravity energy storage unit in operation; AT gra is the time required for a single gravity energy storage unit to put all the weights in operation; N block is the number of the weights in a single gravity energy storage unit. If the power amplitude demand index, the time demand index, and the power difference index of the grid side to the gravity energy storage array system fall within the above interval, the gravity energy storage array system is set as the operation scenario 2.

[0054] In an embodiment of the present application, the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation and the output power, including: if the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operation scenario of the gravity energy storage array system:

[0055]

[0056] Wherein, P grid is the power amplitude demand index; T grid is the time demand index; P block,single is the power change amount corresponding to a single weight block; P gra,max is the maximum output power of a single gravity energy storage unit in operation; P gra,i is the output power of the i-th gravity energy storage unit in operation; ΔT gra is the time required for a single gravity energy storage unit to put all the weight blocks in operation; N block is the number of weight blocks in a single gravity energy storage unit. If the power amplitude demand index, the time demand index and the power difference index of the grid side fall within the above interval, the gravity energy storage array system is set to operation scenario 3.

[0057] In the related art, the power demand of the grid side changes in real time, and a suitable operation scenario needs to be selected to adapt to the control strategy, so as to quickly and accurately meet the demand of the grid. At present, there is a lack of analysis of the overall operation scenario of the gravity energy storage array system, but a set of control strategies is used to control the gravity energy storage array system. When the power demand of the grid side changes, all gravity energy storage units in the gravity energy storage array system need to switch the operation state, and frequent switching of the operation state will cause operation loss. The present application determines the operation scenario of the gravity energy storage array system to match the corresponding control strategy, and when the power demand of the grid side changes, the operation scenario of the gravity energy storage array system is analyzed to change the corresponding control strategy, so as to quickly and accurately meet the demand of the grid side, and all gravity energy storage units need not to switch the operation state, thereby reducing the operation loss caused by frequent switching of the operation state.

[0058] Figure 3 is a structure block diagram of an operation scenario analysis device of a gravity energy storage array system provided by the present application, as shown in Figure 3 The device comprises:

[0059] A construction module 310 is configured to construct a gravity energy storage array system model.

[0060] The power difference index determination module 320 determines the output power of the gravity energy storage units in operation in the gravity energy storage array system based on the gravity energy storage array system model, and constructs the power difference index between the gravity energy storage units based on the output power.

[0061] The operation scenario determination module 330 determines the operation scenario of the gravity energy storage array system based on the power demand index of the grid side to the gravity energy storage array system, the number of gravity energy storage units in operation, and the output power, or determines the operation scenario of the gravity energy storage array system based on the power demand index, the power difference index, the number of gravity energy storage units in operation, and the output power.

[0062] In an optional embodiment, the gravity energy storage array system model is constructed based on the following formula:

[0063]

[0064] wherein T i,k is the input mechanical torque of the i-th weight block of the k-th gravity energy storage unit; m is the mass of a unit weight block; g is the acceleration of gravity; v is the weight block speed; η is the efficiency of converting gravitational potential energy into electrical energy; S n,k is the rated capacity of the k-th gravity energy storage unit; T m,k is the input mechanical total torque of the k-th gravity energy storage unit; P e,k is the output power of the k-th gravity energy storage unit; T m_gra,k is the input mechanical torque of the k-th gravity energy storage unit; T e,k is the electromagnetic torque of the k-th gravity energy storage unit; T j,k is the inertia time constant of the k-th gravity energy storage unit, D k is the damping coefficient of the k-th gravity energy storage unit; δ k is the power angle of the k-th gravity energy storage unit; ω0 is the synchronous speed of the gravity energy storage unit; ω k is the electrical angular velocity of the k-th gravity energy storage unit; N block is the number of weight blocks in a single gravity energy storage unit.

[0065] In an optional embodiment, the power difference index is constructed based on the following formula:

[0066]

[0067] wherein P ff,array is the power difference index; N gra is the number of gravity energy storage units in operation; P gra,moutput power of the mth gravity energy storage unit in operation; P gra,n output power of the nth gravity energy storage unit in operation.

[0068] In an alternative embodiment, the operation scenario of the gravity energy storage array system is determined based on the power demand index of the grid side on the gravity energy storage array system, the number of the gravity energy storage units in operation, and the output power, comprising:

[0069] the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index of the grid side on the gravity energy storage array system, the time demand index, the number of the gravity energy storage units in operation, and the output power;

[0070] the operation scenario of the gravity energy storage array system is determined based on the power demand index, the power difference index, the number of the gravity energy storage units in operation, and the output power, comprising:

[0071] the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index, the time demand index, the power difference index, the number of the gravity energy storage units in operation, and the output power.

[0072] In an alternative embodiment, the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index of the grid side on the gravity energy storage array system, the time demand index, the number of the gravity energy storage units in operation, and the output power, comprising:

[0073] If the power amplitude demand index, the time demand index, the number of the gravity energy storage units in operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operation scenario of the gravity energy storage array system:

[0074]

[0075] wherein, P grid is the power amplitude demand index; T grid is the time demand index; N gra,h is half of the number of the gravity energy storage units in operation; P gra,i is the output power of the ith gravity energy storage unit in operation, P gra,max is the maximum output power of a single gravity energy storage unit; ΔT gra is the time required for a single gravity energy storage unit to put all the weight blocks, N gra is the number of the gravity energy storage units in operation.

[0076] In an alternative embodiment, the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation, and the output power, comprising:

[0077] If the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operation scenario of the gravity energy storage array system:

[0078]

[0079] wherein P grid is the power amplitude demand index; T grid is the time demand index; P block,single is the power change amount corresponding to a single weight block; P gra,max is the maximum output power of a single gravity energy storage unit in operation; P gra,i is the output power of the i-th gravity energy storage unit in operation; AT gra is the time required for a single gravity energy storage unit to put all the weight blocks in operation; N block is the number of weight blocks in a single gravity energy storage unit.

[0080] In an alternative embodiment, the operation scenario of the gravity energy storage array system is determined based on the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation, and the output power, comprising:

[0081] If the power amplitude demand index, the time demand index, the power difference index, the number of gravity energy storage units in operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operation scenario of the gravity energy storage array system:

[0082]

[0083] wherein P grid is the power amplitude demand index; T grid is the time demand index; P block,single is the power change amount corresponding to a single weight block; P gra,max is the maximum output power of a single gravity energy storage unit in operation; P gra,i is the output power of the i-th gravity energy storage unit in operation; AT gra is the time required for a single gravity energy storage unit to put all the weight blocks in operation; N blockThe number of heavy blocks in a single gravity energy storage unit.

[0084] As shown in Figure 4 The embodiments of the present application provide an electronic device, which comprises a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 complete mutual communication through the communication bus 114,

[0085] The memory 113 is used for storing a computer program.

[0086] In an embodiment of the present application, the processor 111 is used for executing the program stored in the memory 113, and the method provided by any one of the foregoing method embodiments is realized, comprising the following steps:

[0087] A gravity energy storage array system model is constructed.

[0088] The output power of a gravity energy storage unit in the gravity energy storage array system is determined based on the gravity energy storage array system model, and a power difference index between the gravity energy storage units is constructed based on the output power.

[0089] The operation scenario of the gravity energy storage array system is determined based on a power demand index of the grid side, the number of the gravity energy storage units in operation and the output power, or the operation scenario of the gravity energy storage array system is determined based on the power demand index, the power difference index, the number of the gravity energy storage units in operation and the output power.

[0090] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the method provided by any one of the foregoing method embodiments.

[0091] The device embodiments described above are only schematic, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the modules can be selected to achieve the purpose of the embodiments of the present application.

[0092] Those skilled in the art can clearly understand the implementation of the various embodiments by means of software plus a general hardware platform from the above description of the embodiments, and of course, the various embodiments can also be implemented by hardware. Based on such an understanding, the above technical solutions, essentially or in other words, the part that contributes to the related art, can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a plurality of instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0093] The above embodiments are merely examples for clearly illustrating the embodiments, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or modifications can also be made by those of ordinary skill in the art. Here, it is not necessary or possible to exhaust all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A method for analyzing operating scenarios of a gravity energy storage array system, characterized in that: include: Construct a gravity energy storage array system model; Determining the output power of the gravity energy storage units put into operation in the gravity energy storage array system based on the gravity energy storage array system model, and constructing a power difference index between the gravity energy storage units based on the output power; The operating scenario of the gravity energy storage array system is determined based on the power demand index of the gravity energy storage array system on the grid side, the number of the gravity energy storage units put into operation, and the output power, or the operating scenario of the gravity energy storage array system is determined based on the power demand index of the gravity energy storage array system on the grid side, the power difference index, the number of the gravity energy storage units put into operation, and the output power.

2. The method according to claim 1, characterized in that The gravity energy storage array system model is constructed based on the following formula: Among them, T i,k is the input mechanical torque of the i-th weight block of the k-th gravity energy storage unit; m is the unit weight block mass; g is the acceleration of gravity; v is the weight block velocity; η is the efficiency of converting gravitational potential energy into electrical energy; S n,k is the rated capacity of the kth gravity energy storage unit; T m,k is the total input mechanical torque of the kth gravity energy storage unit; P e,k is the output power of the kth gravity energy storage unit; T m_gra,k is the input mechanical torque of the kth gravity energy storage unit; T e,k is the electromagnetic torque of the kth gravity energy storage unit; T j,k is the inertia time constant of the kth gravity energy storage unit, D k is the damping coefficient of the kth gravity energy storage unit; δ k is the power angle of the kth gravity energy storage unit; ω0 is the synchronous speed of the gravity energy storage unit; ω k is the electrical angular velocity of the kth gravity energy storage unit; N block is the number of weight blocks in a single gravity energy storage unit.

3. The method according to claim 1, characterized in that The power difference index is constructed based on the following formula: Among them, P ff,array is the power difference index; N gra is the number of gravity energy storage units put into operation; gra,m is the output power of the mth gravity energy storage unit put into operation; P gra,n is the output power of the nth gravity energy storage unit put into operation.

4. The method according to claim 1, wherein Determining an operation scenario of the gravity energy storage array system based on a power demand index of the grid side for the gravity energy storage array system, the number of the gravity energy storage units put into operation, and the output power includes: Determining an operating scenario of the gravity energy storage array system based on the power amplitude demand index and time demand index of the gravity energy storage array system on the grid side, the number of the gravity energy storage units put into operation, and the output power; Determining an operation scenario of the gravity energy storage array system based on a power demand index of the grid side for the gravity energy storage array system, the power difference index, the number of gravity energy storage units put into operation, and the output power includes: An operation scenario of the gravity energy storage array system is determined based on the power amplitude requirement index, the time requirement index, the power difference index, the number of the gravity energy storage units put into operation, and the output power.

5. The method according to claim 4, characterized in that Determining an operation scenario of the gravity energy storage array system based on a power amplitude demand index and a time demand index of the gravity energy storage array system on the grid side, the number of gravity energy storage units put into operation, and the output power includes: If the power amplitude requirement index, the time requirement index, the number of gravity units put into operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operating scenario of the gravity energy storage array system: Among them, P grid is the power amplitude requirement index; T grid is the time requirement indicator; N gra,h is half of the number of gravity energy storage units put into operation; P gra,i is the output power of the i-th gravity energy storage unit put into operation, P gra,max is the maximum output power of a single gravity energy storage unit put into operation; ΔT gra The time required to put all the weight blocks into operation for a single gravity energy storage unit, N gra is the number of gravity energy storage units put into operation.

6. The method according to claim 4, characterized in that Determining an operation scenario of the gravity energy storage array system based on the power amplitude requirement index, the time requirement index, the power difference index, the number of the gravity energy storage units put into operation, and the output power includes: If the power amplitude requirement index, the time requirement index, the power difference index, the number of gravity energy storage units put into operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operating scenario of the gravity energy storage array system: Among them, P grid is the power amplitude requirement index; T grid is the time requirement indicator; P block,single is the power change corresponding to a single weight block; P gra,max is the maximum output power of a single gravity energy storage unit put into operation; P gra,i is the output power of the i-th gravity energy storage unit put into operation; ΔT gra The time required to put all the weight blocks into use for a single gravity energy storage unit; N block is the number of weight blocks in a single gravity energy storage unit.

7. The method according to claim 4, characterized in that Determining an operation scenario of the gravity energy storage array system based on the power amplitude requirement index, the time requirement index, the power difference index, the number of the gravity energy storage units put into operation, and the output power includes: If the power amplitude requirement index, the time requirement index, the power difference index, the number of gravity energy storage units put into operation, and the output power satisfy the following formula, the scenario corresponding to the following formula is determined as the operating scenario of the gravity energy storage array system: Among them, P grid is the power amplitude requirement index; T grid is the time requirement indicator; P block,single is the power change corresponding to a single weight block; P gra,max is the maximum output power of a single gravity energy storage unit put into operation; P gra,i is the output power of the i-th gravity energy storage unit put into operation; ΔT gra The time required to put all the weight blocks into a single gravity energy storage unit; N block is the number of weight blocks in a single gravity energy storage unit.

8. An operating scenario analysis device for a gravity energy storage array system, characterized in that: include: A building module for constructing a gravity energy storage array system model; a power difference index determination module, which determines the output power of the gravity energy storage units put into operation in the gravity energy storage array system based on the gravity energy storage array system model, and constructs a power difference index between the gravity energy storage units based on the output power; An operating scenario determination module is used to determine the operating scenario of the gravity energy storage array system based on the power demand index of the gravity energy storage array system on the grid side, the number of the gravity energy storage units put into operation, and the output power, or to determine the operating scenario of the gravity energy storage array system based on the power demand index of the gravity energy storage array system on the grid side, the power difference index, the number of the gravity energy storage units put into operation, and the output power.

9. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed in a computer, the computer is caused to execute the method according to any one of claims 1 to 7.

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