Micro-energy network shared energy storage dynamic capacity distribution device and method based on event triggering

Abstract

The invention belongs to the technical field of multi-body dynamic capacity allocation based on event triggering, and particularly relates to a micro-energy network shared energy storage dynamic capacity allocation device and method based on event triggering. The method comprises the following steps: determining event types in a shared energy storage operation process in a micro-energy network, wherein the event types comprise active events and passive events; designing a passive event triggering method; recording event trigger marks, and summarizing the event trigger marks by the shared energy storage service provider operation platform; and after an event is triggered and an event triggering mark is transmitted to the micro-energy network shared energy storage operation service provider operation platform, the micro-energy network shared energy storage operation service provider operation platform redistributes the shared energy storage capacity and issues the shared energy storage capacity to the shared energy storage lower-layer instruction distribution and control module. According to the method, efficient sharing and optimal utilization of energy storage resources are achieved, compared with traditional periodic triggering or continuous triggering, the communication cost of the micro-energy network shared energy storage system is reduced, and day-ahead optimal allocation of the micro-energy network shared energy storage and intraday dynamic allocation of the micro-energy network shared energy storage are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-agent dynamic capacity allocation based on event triggering, and in particular relates to a device and method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering. Background Art

[0002] With the widespread application of renewable energy and the development of smart grid technology, micro-grids have attracted widespread attention as an effective way to manage distributed energy. Micro-grids can achieve small-scale power generation, distribution and consumption, and can effectively integrate distributed energy resources such as solar photovoltaics, wind power, energy storage equipment, etc., improve energy utilization efficiency, and enhance the flexibility and reliability of the power grid.

[0003] However, due to the intermittent and uncertain nature of renewable energy in micro-energy grids, as well as the variability of user loads, the stable operation and optimal scheduling of micro-energy grids face challenges. As a key component for balancing power generation and load and improving system stability, energy storage devices play an important role in micro-energy grids. However, the energy storage capacity of a single micro-energy grid unit is limited, making it difficult to cope with large-scale energy regulation needs.

[0004] Therefore, it is necessary to develop a method and device that can share energy storage resources among multiple micro-energy grid units and realize dynamic capacity allocation. Summary of the invention

[0005] In view of the shortcomings of the above-mentioned prior art, the present invention provides a device and method for allocating dynamic capacity of shared energy storage in a micro-energy grid based on event triggering. The purpose is to improve the utilization rate of energy storage equipment, enhance the energy management capability of the micro-energy grid, and realize energy sharing among multiple entities through dynamic capacity allocation.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0007] A device for allocating dynamic capacity of shared energy storage in a micro-energy grid based on event triggering realizes dynamic capacity allocation of shared energy storage in a micro-energy grid through energy storage unit modules, energy storage unit module topology connection modules, shared energy storage device AC / DC charging modules, shared energy storage device DC / AC micro-energy grid unit power supply output modules, shared energy storage device output interface control modules, shared energy storage upper-layer remote monitoring and control modules, and shared energy storage lower-layer instruction allocation and control modules; wherein the power grid is connected to the shared energy storage device AC / DC charging module, the shared energy storage device AC / DC charging module is connected to the energy storage unit module, and the energy storage unit module is connected to the energy storage unit module topology connection module The energy storage unit module topology connection module is connected to the shared energy storage device output interface control module, the shared energy storage device output interface control module is connected to the shared energy storage device DC / AC micro energy grid unit power supply output module, and the shared energy storage device DC / AC micro energy grid unit power supply output module is connected to the micro energy grid unit; the shared energy storage upper layer remote monitoring and control module is connected to the shared energy storage lower layer instruction distribution and control module; the shared energy storage device DC / AC load power supply module is connected to the shared energy storage device output interface control module, and the shared energy storage lower layer instruction distribution and control module is connected to the energy storage unit module topology connection module and the shared energy storage device output interface control module in sequence.

[0008] Furthermore, the energy storage unit module includes: a standard battery pack unit, a battery pack energy management system module and an energy storage unit module operation status monitoring unit, wherein the standard battery pack unit is connected to the battery pack energy management system module, and the energy storage unit module operation status monitoring unit is connected to the standard battery pack unit and the battery pack energy management system module;

[0009] The energy storage unit module topology connection module includes: a large-capacity DC power relay, a high-power connector, and a topology generation unit; wherein the shared energy storage lower-layer instruction allocation and control module is connected to the topology generation unit, the topology generation unit is connected to the large-capacity DC power relay, and the high-power connector is connected to the large-capacity power relay topology generation unit; the topology generation unit is used to convert the dynamic capacity allocation instruction issued by the shared energy storage lower-layer instruction allocation and control module into a connection topology, and output a large-capacity DC power relay action signal, so that the large-capacity DC power relay changes the energy storage unit module connection state;

[0010] The shared energy storage device output interface control module includes m output interfaces for connecting m micro energy grid units; wherein the number of energy storage module units connected to the micro energy grid unit, that is, the shared energy storage capacity connected to the micro energy grid unit, is determined by the energy storage unit module topology connection module according to the shared energy storage upper layer remote monitoring and control module and the shared energy storage lower layer instruction distribution and control module;

[0011] The shared energy storage upper-layer remote monitoring and control module includes: a communication unit, a computing and processing unit, an energy storage unit module operating status acquisition unit, a user-side interaction unit, an event triggering perception and response unit, and a micro-energy network shared energy storage service provider operation platform; wherein the energy storage unit module operating status acquisition unit is used to acquire the energy storage unit module operating status, and transmit the energy storage unit module operating status to the user-side interaction unit and the event triggering perception and response unit; the event triggering perception and response unit designs an event triggering mechanism for the energy storage unit module operating status, and monitors, identifies, and responds, and transmits the triggering event flag to the micro-energy network shared energy storage service provider operation platform; the micro-energy network shared energy storage service provider operation platform is used to perform optimal day-ahead allocation and intra-day dynamic allocation of shared energy storage capacity;

[0012] The shared energy storage lower layer instruction distribution and control module is used to distribute the control instructions of the shared energy storage upper layer remote monitoring and control module to the energy storage unit module topology connection module.

[0013] A method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering, comprising:

[0014] Determine the types of events during the operation of shared energy storage in the micro-energy grid, including active events and passive events;

[0015] Design passive event triggering methods;

[0016] Record event trigger flags and summarize them on the shared energy storage service provider’s operation platform;

[0017] When an event is triggered, the event trigger flag is transmitted to the micro-energy network shared energy storage operation service provider operation platform, and the micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module.

[0018] Furthermore, the event types include active events and passive events;

[0019] Active events refer to events such as: during the operation of shared energy storage in the micro-energy network, the shared energy storage service provider's operation platform issues instructions, and the shared energy storage service provider's operation platform tracks whether the shared energy storage capacity allocation is completed;

[0020] Passive events refer to: during the operation of shared energy storage in the micro-energy grid, the number of electric vehicles charged increases / decreases or the photovoltaic output increases / decreases suddenly; when a passive event is triggered, the shared energy storage service provider's operating platform will re-formulate the optimal capacity allocation plan based on the status of all micro-energy grid units in the micro-energy grid and the current shared energy storage allocation results.

[0021] Furthermore, after the event is triggered, the event trigger flag is transmitted to the micro-energy network shared energy storage operation service provider operation platform, and the micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module;

[0022] The micro-energy grid shared energy storage operation service provider operation platform includes: the day-ahead optimal allocation of the micro-energy grid shared energy storage and the intra-day dynamic allocation of the micro-energy grid shared energy storage;

[0023] The day-ahead optimal allocation of the micro-energy grid shared energy storage: when the micro-energy grid shared energy storage service provider operation platform starts running, it is necessary to initialize the optimal allocation of the shared energy storage device according to the typical daily load and photovoltaic output of the micro-energy grid;

[0024] The intraday dynamic allocation of the micro-energy network shared energy storage: when the micro-energy network shared energy storage service provider operation platform is operating normally, the capacity of the shared energy storage device at the next moment needs to be reallocated according to the event triggering mark and the load and photovoltaic output at the time of event triggering;

[0025] Furthermore, the method for optimal day-ahead allocation of the micro-energy grid shared energy storage includes:

[0026] Step 41. Determine the quantity and status of energy storage unit modules and micro energy grid units of the shared energy storage device;

[0027] According to the shared energy storage upper-layer remote monitoring and control module, the number and status of the energy storage unit modules and micro-grid units of the shared energy storage device are obtained, and the status of the energy storage unit modules of each shared energy storage device is marked or updated in each monitoring cycle; the micro-grid units participating in the shared energy storage are determined, and the main grid power supply at the typical daily collection time t of the micro-grid unit i is recorded Photovoltaic output Load data Electric vehicle charging station charging data

[0028] Step 42: Initialize and evenly distribute the energy storage unit modules of the shared energy storage device to the micro energy grid units. The number of energy storage unit modules of the shared energy storage device distributed to the micro energy grid unit i is n. i , combined into a storage unit module set Ω of micro energy grid unit i on the shared energy storage service provider operation platform i ;

[0029] Step 43. Establish an optimization model for optimal allocation of shared energy storage in micro-energy grid units;

[0030] Calculate the self-power supply rate of shared energy storage participating in the operation of micro-grid unit i

[0031]

[0032] in, represents the power injected by the main grid into micro-grid unit i at time t, represents the load power of micro-grid unit i at time t, in represents the basic life electricity load of micro-grid unit i at time t, and They represent the charging power and discharging power of the energy storage unit at time t allocated to the shared energy storage of micro-grid unit i, respectively. and They represent the charging and discharging status of the energy storage unit allocated to the micro-grid unit i by the shared energy storage service provider at time t, Indicates that it is in charging state. Indicates that it is not charging. Similarly, the energy storage device cannot be charged and discharged at the same time.

[0033]

[0034] Charging power The capacity of the energy storage unit assigned to the micro-grid unit i Photovoltaic output And main network supply jointly determined;

[0035]

[0036] in, represents the amount of electricity allocated to the energy storage device of micro-grid unit i at time t, represents the capacity of the energy storage device assigned to micro-grid unit i at time t, represents the charge state of the energy storage device assigned to micro-grid unit i at time t, n i represents the number of energy storage unit modules of the energy storage device connected to the micro-energy grid unit i, B storage_unit is the standard battery unit capacity; Indicates the charging efficiency of the energy storage device;

[0037] Discharge power The capacity of the energy storage unit assigned to the micro-grid unit i Photovoltaic output And main network supply jointly determined;

[0038]

[0039] Step 44. Determine the objective function and constraint conditions of the shared energy storage optimal allocation optimization model;

[0040] Establish the objective function G of the self-power supply rate of the micro-grid unit after participating in shared energy storage self :

[0041]

[0042] Based on the energy storage unit module capacity and charging and discharging status of the energy storage device As a decision variable, with the self-power supply rate as the objective function, the energy storage device needs to satisfy the constraint set C, and the optimal conventional capacity allocation is solved by the CPLEX commercial solver;

[0043]

[0044] in, Represents the maximum charging / discharging power of the energy storage unit module set Ωi of the micro energy grid unit i; Indicates that the power of the energy storage unit module set Ωi of the micro energy grid unit i maintains energy conservation after one scheduling cycle;

[0045] Step 45. The shared energy storage service provider operation platform solves the shared energy storage optimal allocation model in the micro-energy grid unit, and sends the capacity allocation result to the shared energy storage lower-layer instruction allocation and control module to complete the optimal allocation of shared energy storage capacity;

[0046] The method for dynamically allocating energy stored in a micro-energy grid during the day includes:

[0047] Obtain the load and photovoltaic output status when the event is triggered;

[0048] Update the load and PV output parameters in the day-ahead optimal allocation solution model;

[0049] The shared energy storage service provider operates a platform to solve the optimal allocation model of shared energy storage in the micro-energy grid unit;

[0050] Sent to the lower-level command distribution and control module of shared energy storage.

[0051] Furthermore, solving the shared energy storage optimal allocation model includes:

[0052] Obtain the typical daily load and photovoltaic output of each micro-grid unit for planning the allocation of shared energy storage capacity on the day before, or the load and photovoltaic output of each micro-grid unit at the time of event triggering for reallocation of shared energy storage in response to event triggering;

[0053] Establish a model for the operation of shared energy storage in micro-energy grids, including optimization objectives, constraints and power flow calculation methods;

[0054] Configure the solution parameters of the CPLEX commercial solver, check the solution results, and obtain the optimal allocation of shared energy storage on the day before or within the day.

[0055] A device for allocating dynamic capacity of shared energy storage in a micro-energy grid based on event triggering is used to implement the steps of any one of the methods for allocating dynamic capacity of shared energy storage in a micro-energy grid based on event triggering, comprising:

[0056] An event type determination module is used to determine the event type during the operation of shared energy storage in the micro-energy grid, including active events and passive events;

[0057] Trigger method design module, used to design passive event trigger method;

[0058] The recording and aggregation module is used to record event triggering signs and summarize them by the shared energy storage service provider operation platform;

[0059] The transmission and reallocation module is used to transmit the event trigger flag to the micro-energy network shared energy storage operation service provider operation platform when the event is triggered. The micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module.

[0060] A computer device comprises a storage medium, a processor and a computer program stored on the storage medium and executable on the processor, wherein when the processor executes the computer program, any one of the steps of a method for dynamic capacity allocation of micro-energy grid shared energy storage based on event triggering is implemented.

[0061] A computer storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program implements the steps of any one of the event-triggered methods for allocating dynamic capacity of micro-energy grid shared energy storage.

[0062] The present invention has the following beneficial effects and advantages:

[0063] The present invention provides a device and method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering, which realizes efficient sharing and optimized utilization of energy storage resources through real-time monitoring and intelligent control; firstly, through the device for allocating dynamic capacity of micro-energy grid shared energy storage, a device foundation is established for the dynamic allocation of micro-energy grid shared energy storage capacity from the device level; secondly, through the introduction of event triggering method, a method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering is established, which reduces the communication cost of micro-energy grid shared energy storage system compared with traditional periodic triggering or continuous triggering. Finally, by establishing an operation platform for micro-energy grid shared energy storage service providers, the optimal allocation of micro-energy grid shared energy storage on the day and the dynamic allocation of micro-energy grid shared energy storage within the day are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0065] Figure 1 It is an overall block diagram of the device and method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering of the present invention;

[0066] Figure 2 It is a structural diagram of the energy storage unit module of the present invention;

[0067] Figure 3 It is a structural diagram of the topological connection module of the energy storage unit module of the present invention;

[0068] Figure 4 It is the upper remote monitoring and control module of the present invention;

[0069] Figure 5 It is a flow chart of the method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering of the present invention;

[0070] Figure 6 It is a flow chart of the optimal allocation of the shared energy storage of the micro-energy grid of the present invention;

[0071] Figure 7 It is a flow chart of the intraday dynamic allocation of shared energy storage in the micro-energy grid of the present invention. DETAILED DESCRIPTION

[0072] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0073] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0074] Refer to the following Figure 1-Figure 7 The technical solutions of some embodiments of the present invention are described.

[0075] Example 1

[0076] The present invention provides an embodiment, which is a device and method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering. Figure 1 As shown, Figure 1 It is an overall block diagram of the device and method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering of the present invention.

[0077] The device of the present invention realizes dynamic capacity allocation of micro-energy network shared energy storage by integrating energy storage unit module A, energy storage unit module B...energy storage unit module N, energy storage unit module topology connection module, shared energy storage device AC / DC charging module, shared energy storage device DC / AC micro-energy network unit power supply output module, shared energy storage device output interface control module, shared energy storage upper layer remote monitoring and control module, and shared energy storage lower layer instruction distribution and control module.

[0078] The device of the present invention can intelligently manage and control energy storage resources according to real-time demand and status, optimize power grid operation, improve system stability and self-power supply rate, support multi-subject operation and user interaction, and promote renewable energy consumption. Among them, all energy storage unit modules are connected to the energy storage unit module topology connection module, the shared energy storage device AC / DC charging module is connected to the power grid, the shared energy storage device DC / AC load power supply module is connected to the shared energy storage device output interface control module, the shared energy storage lower layer instruction distribution and control module is connected to the shared energy storage device output interface control module, the shared energy storage device output interface control module is connected to the energy storage unit module topology connection module, and the shared energy storage upper layer remote monitoring and control module is connected to the shared energy storage lower layer instruction distribution and control module.

[0079] like Figure 2 As shown, Figure 2 The energy storage unit module of the present invention mainly includes: a standard battery pack unit, a battery pack energy management system module and an energy storage unit module operation status monitoring unit. The number of energy storage unit modules N is greater than the number of micro-energy grid units m. The standard battery pack unit is connected to the battery pack energy management system module, and the energy storage unit module operation status monitoring unit is connected to the standard battery pack unit and the battery pack energy management system module.

[0080] like Figure 3 As shown, Figure 3 It is a structural diagram of the energy storage unit module topology connection module of the present invention. The energy storage unit module topology connection module of the present invention mainly includes: a large-capacity DC power relay, a high-power connector, and a topology generation unit. The topology generation unit is used to convert the dynamic capacity allocation instruction issued by the shared energy storage lower-layer instruction allocation and control module into a connection topology, and output a large-capacity DC power relay action signal, so that the large-capacity DC power relay changes the connection state of the energy storage unit module. The shared energy storage lower-layer instruction allocation and control module is connected to the topology generation unit, the topology generation unit is connected to the large-capacity DC power relay, and the high-power connector is connected to the large-capacity power relay.

[0081] The output interface control module of the shared energy storage device includes m output interfaces for connecting m micro energy grid units. The number of energy storage module units connected to the micro energy grid unit, that is, the shared energy storage capacity connected to the micro energy grid unit, is determined by the energy storage unit module topology connection module according to the shared energy storage upper layer remote monitoring and control module and the shared energy storage lower layer instruction distribution and control module.

[0082] like Figure 4 As shown, Figure 4 It is the upper-layer remote monitoring and control module of the shared energy storage of the present invention. The upper-layer remote monitoring and control module of the shared energy storage of the present invention is composed of a communication unit, a computing and processing unit, an energy storage unit module operation status acquisition unit, a user-side interaction unit, an event triggering perception and response unit, and a micro-energy network shared energy storage service provider operation platform. The energy storage unit module operation status acquisition unit is used to acquire the energy storage unit module operation status, and transmit the energy storage unit module operation status to the user-side interaction unit and the event triggering perception and response unit. The event triggering perception and response unit designs an event triggering mechanism for the energy storage unit module operation status, and monitors, identifies, and responds, and transmits the triggering event flag to the micro-energy network shared energy storage service provider operation platform. The micro-energy network shared energy storage service provider operation platform is used to perform optimal day-ahead allocation and intra-day dynamic allocation of shared energy storage capacity.

[0083] The shared energy storage lower layer instruction distribution and control module of the present invention is used to distribute the control instructions of the shared energy storage upper layer remote monitoring and control module to the energy storage unit module topology connection module.

[0084] Example 2

[0085] The present invention further provides an embodiment, which is a method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering, and is implemented using a device for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering described in Example 1.

[0086] like Figure 5 As shown, Figure 5 The present invention is a flow chart of a method for allocating dynamic capacity of a micro-energy grid shared energy storage based on event triggering. The specific steps of the method for allocating dynamic capacity of a micro-energy grid shared energy storage based on event triggering are as follows:

[0087] Step 1. Determine the event types included in the shared energy storage operation process in the micro-energy grid, including: active events and passive events.

[0088] During the operation of shared energy storage in the micro-energy network, the shared energy storage service provider's operation platform issues instructions, and the shared energy storage service provider's operation platform tracks whether the shared energy storage capacity allocation is completed. This type of event is called an active event.

[0089] The increase / decrease in the number of electric vehicle charging or the sudden increase / decrease in photovoltaic output during the operation of shared energy storage in the micro-energy grid is called a passive event. After the passive event is triggered, the shared energy storage service provider operation platform needs to re-formulate the optimal capacity allocation plan based on the status of all micro-energy grid units in the micro-energy grid and the current shared energy storage allocation results.

[0090] In the event-triggered micro-energy grid shared energy storage dynamic capacity allocation method described in the present invention, event triggering refers to passive event triggering.

[0091] Step 2. Design a passive event triggering method.

[0092] First, obtain the status s of the micro-grid unit i in the shared energy storage service provider operation platform i ,in

[0093]

[0094] Calculate the net load power and net PV power:

[0095]

[0096] in, Indicates the net load power, represents the net photovoltaic power, x i (t) represents the net state of micro-grid unit i at time t, including net load power and net photovoltaic power, and T represents matrix transpose.

[0097] Next, define the error function as follows:

[0098] e i (t k )=x i (t k )-x i (t k-1 )

[0099] In the above formula, e i (t k ) represents the micro-energy grid unit i at adjacent collection time, i.e., t k Time and t k The previous moment t k-1 The net condition is poor.

[0100] The event trigger index is then defined by the slope of the secant line at adjacent acquisition moments, as shown in the following formula:

[0101]

[0102] In the above formula, S i (t k ) represents the adjacent acquisition time t kWith t k-1 The slope of the secant line between Indicates the net load power at adjacent acquisition times t k With t k-1 The slope of the secant line between Indicates the net photovoltaic power at adjacent collection times t k With t k-1 The slope of the secant line between .

[0103] The load secant slope trigger boundary limit δ and the photovoltaic secant slope trigger boundary limit ε are formulated by the power grid power management department.

[0104] judge If satisfied, it means that the current micro-grid unit i load has a sudden power increase, and the event trigger flag is set. Indicates that the current micro-grid unit i load has a power drop event trigger flag otherwise in It represents the typical daily net load power at adjacent collection time t k With t k-1 The slope of the secant line between The event trigger flag representing the net load power mainly has three states: 1, 0, and -1, which respectively represent power surge triggering, no triggering, and power sag triggering.

[0105] Empathy If satisfied, it means that the photovoltaic output of the current micro-grid unit i suddenly increases, and the event trigger flag is It indicates that the current micro-grid unit i load has a power drop event trigger flag. otherwise in It represents the typical daily net photovoltaic power at adjacent collection times t k With t k-1 The slope of the secant line between The event trigger flag representing the net photovoltaic power mainly has three states: 1, 0, and -1, which respectively represent power surge triggering, no triggering, and power sag triggering.

[0106] Step 3. Record event trigger flags And it is aggregated by the shared energy storage service provider operation platform.

[0107]

[0108] In the above formula, Represents a collection of event trigger flags.

[0109] Step 4. When the event is triggered, the event trigger flag is transmitted to the micro-energy network shared energy storage operation service provider operation platform, and the micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module.

[0110] The micro-energy grid shared energy storage operation service provider operation platform mainly includes: the day-ahead optimal allocation of micro-energy grid shared energy storage and the intra-day dynamic allocation of micro-energy grid shared energy storage.

[0111] The day-ahead optimal allocation of the micro-energy grid shared energy storage: when the micro-energy grid shared energy storage service provider operation platform starts running, it is necessary to initialize the optimal allocation of the shared energy storage device according to the typical daily load and photovoltaic output of the micro-energy grid.

[0112] The intraday dynamic allocation of the micro-energy network shared energy storage: when the micro-energy network shared energy storage service provider operation platform operates normally, it is necessary to reallocate the capacity of the shared energy storage device at the next moment according to the event triggering mark and the load and photovoltaic output conditions at the time of event triggering.

[0113] like Figure 6 As shown, Figure 6 The present invention is a flowchart of the optimal allocation of the shared energy storage of the micro-energy grid on the day before the present invention. The method of the optimal allocation of the shared energy storage of the micro-energy grid on the day before the present invention mainly includes the following steps:

[0114] Step 41. Determine the number and status of energy storage unit modules and micro energy grid units of the shared energy storage device.

[0115] According to the shared energy storage upper-layer remote monitoring and control module, the number and status of the energy storage unit modules and micro-grid units of the shared energy storage device are obtained, and the status of the energy storage unit modules of each shared energy storage device is marked or updated in each monitoring cycle. Determine the micro-grid units participating in the shared energy storage, and record the main grid supply power at the typical daily collection time t of the micro-grid unit i Photovoltaic output Load data Electric vehicle charging station charging data

[0116] Step 42: Initialize and evenly distribute the energy storage unit modules of the shared energy storage device to the micro energy grid units. The number of energy storage unit modules of the shared energy storage device distributed to the micro energy grid unit i is n. i , combined into a storage unit module set Ω of micro energy grid unit i on the shared energy storage service provider operation platform i .

[0117] Step 43. Establish an optimization model for optimal allocation of shared energy storage in micro-energy grid units.

[0118] Calculate the self-power supply rate of shared energy storage participating in the operation of micro-grid unit i

[0119]

[0120] in, represents the power injected by the main grid into micro-grid unit i at time t, represents the load power of micro-grid unit i at time t, in represents the basic life electricity load of micro-grid unit i at time t, and They represent the charging power and discharging power of the energy storage unit at time t allocated to the shared energy storage of micro-grid unit i, respectively. and They represent the charging and discharging status of the energy storage unit allocated to the micro-grid unit i by the shared energy storage service provider at time t, Indicates that it is in charging state. Indicates that it is not charging. Similarly, the energy storage device cannot be charged and discharged at the same time.

[0121]

[0122] Charging power The capacity of the energy storage unit assigned to the micro-grid unit i Photovoltaic output And main network supply Determined jointly.

[0123]

[0124] in, represents the amount of electricity allocated to the energy storage device of micro-grid unit i at time t, represents the capacity of the energy storage device assigned to micro-grid unit i at time t, represents the charge state of the energy storage device assigned to micro-grid unit i at time t, n i represents the number of energy storage unit modules of the energy storage device connected to the micro-energy grid unit i, B storage_unit is the standard battery unit capacity; Indicates the charging efficiency of the energy storage device.

[0125] Discharge power The capacity of the energy storage unit assigned to the micro-grid unit i Photovoltaic output And main network supply Jointly determine,

[0126]

[0127] Step 44. Determine the objective function and constraints of the shared energy storage optimal allocation optimization model.

[0128] Establish the objective function G of the self-power supply rate of the micro-grid unit after participating in shared energy storage self :

[0129]

[0130] Based on the energy storage unit module capacity and charging and discharging status of the energy storage device As the decision variable, with the self-power supply rate as the objective function, the energy storage device needs to satisfy the constraint set C, and the optimal conventional capacity allocation is solved by the CPLEX commercial solver.

[0131]

[0132] in, Represents the maximum charging / discharging power of the energy storage unit module set Ωi of the micro energy grid unit i; The power of the energy storage unit module set Ωi of the micro energy grid unit i maintains energy conservation after one scheduling cycle.

[0133] Step 45. The shared energy storage service provider operation platform solves the shared energy storage optimal allocation model in the micro-energy grid unit, and sends the capacity allocation result to the shared energy storage lower-level instruction allocation and control module to complete the optimal allocation of shared energy storage capacity.

[0134] like Figure 7 As shown, Figure 7 The present invention is a flow chart of the intraday dynamic allocation of shared energy storage in a micro-energy grid. The method of intraday dynamic allocation of shared energy storage in a micro-energy grid described in the present invention mainly includes the following steps:

[0135] Step 1. Obtain the load and photovoltaic output when the event is triggered;

[0136] Step 2. Update the load and PV output parameters in the day-ahead optimal allocation solution model;

[0137] Step 3. The shared energy storage service provider operation platform solves the shared energy storage optimal allocation model in the micro-energy grid unit;

[0138] Step 4. Send to the shared energy storage lower-level command allocation and control module.

[0139] The method for solving the optimal allocation model of shared energy storage mainly includes:

[0140] Step (1) obtaining the typical daily load and photovoltaic output of each micro-grid unit for planning the allocation of shared energy storage capacity on the day before, or the load and photovoltaic output of each micro-grid unit at the time of event triggering for reallocating shared energy storage in response to event triggering;

[0141] Step (2) establishing a shared energy storage participating in the micro-energy grid operation model, including optimization objectives, constraints and power flow calculation methods;

[0142] Step (3) configure the solution parameters of the CPLEX commercial solver, check the solution results, and obtain the optimal allocation of shared energy storage on the day before or within the day.

[0143] Example 3

[0144] The present invention further provides an embodiment, which is a device for allocating dynamic capacity of a micro-energy grid shared energy storage based on event triggering, and is used to implement the steps of a method for allocating dynamic capacity of a micro-energy grid shared energy storage based on event triggering described in Example 2, including:

[0145] An event type determination module is used to determine the event type during the operation of shared energy storage in the micro-energy grid, including active events and passive events;

[0146] Trigger method design module, used to design passive event trigger method;

[0147] The recording and aggregation module is used to record event triggering signs and summarize them by the shared energy storage service provider operation platform;

[0148] The transmission and reallocation module is used to transmit the event trigger flag to the micro-energy network shared energy storage operation service provider operation platform when the event is triggered. The micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module.

[0149] Example 4

[0150] Based on the same inventive concept, an embodiment of the present invention further provides a computer device, including a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor. When the processor executes the computer program, the steps of the method for dynamic capacity allocation of micro-energy grid shared energy storage based on event triggering described in Example 2 are implemented.

[0151] Example 5

[0152] Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of a method for dynamic capacity allocation of micro-energy grid shared energy storage based on event triggering described in Example 2 are implemented.

[0153] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0154] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0155] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0156] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering, characterized by: The dynamic capacity allocation of micro-energy network shared energy storage is realized through energy storage unit modules, energy storage unit module topology connection modules, shared energy storage device AC / DC charging modules, shared energy storage device DC / AC micro-energy network unit power supply output modules, shared energy storage device output interface control modules, shared energy storage upper layer remote monitoring and control modules, and shared energy storage lower layer instruction distribution and control modules. Among them, the power grid is connected to the shared energy storage device AC / DC charging module, the shared energy storage device AC / DC charging module is connected to the energy storage unit module, the energy storage unit module is connected to the energy storage unit module topology connection module, and the energy storage unit module topology connection module is connected to the energy storage unit module topology connection module. The block is connected to the shared energy storage device output interface control module, the shared energy storage device output interface control module is connected to the shared energy storage device DC / AC micro energy grid unit power supply output module, and the shared energy storage device DC / AC micro energy grid unit power supply output module is connected to the micro energy grid unit; the shared energy storage upper layer remote monitoring and control module is connected to the shared energy storage lower layer instruction distribution and control module; the shared energy storage device DC / AC load power supply module is connected to the shared energy storage device output interface control module, and the shared energy storage lower layer instruction distribution and control module is connected to the energy storage unit module topology connection module and the shared energy storage device output interface control module in sequence.

2. According to the event-triggered micro-energy grid shared energy storage dynamic capacity allocation device according to claim 1, it is characterized by: The energy storage unit module includes: a standard battery pack unit, a battery pack energy management system module and an energy storage unit module operation status monitoring unit, wherein the standard battery pack unit is connected to the battery pack energy management system module, and the energy storage unit module operation status monitoring unit is connected to the standard battery pack unit and the battery pack energy management system module; The energy storage unit module topology connection module includes: a large-capacity DC power relay, a high-power connector, and a topology generation unit; wherein the shared energy storage lower-layer instruction allocation and control module is connected to the topology generation unit, the topology generation unit is connected to the large-capacity DC power relay, and the high-power connector is connected to the large-capacity power relay topology generation unit; the topology generation unit is used to convert the dynamic capacity allocation instruction issued by the shared energy storage lower-layer instruction allocation and control module into a connection topology, and output a large-capacity DC power relay action signal, so that the large-capacity DC power relay changes the energy storage unit module connection state; The shared energy storage device output interface control module includes m output interfaces for connecting m micro energy grid units; wherein the number of energy storage module units connected to the micro energy grid unit, that is, the shared energy storage capacity connected to the micro energy grid unit, is determined by the energy storage unit module topology connection module according to the shared energy storage upper layer remote monitoring and control module and the shared energy storage lower layer instruction distribution and control module; The shared energy storage upper-layer remote monitoring and control module includes: a communication unit, a computing and processing unit, an energy storage unit module operating status acquisition unit, a user-side interaction unit, an event triggering perception and response unit, and a micro-energy network shared energy storage service provider operation platform; wherein the energy storage unit module operating status acquisition unit is used to acquire the energy storage unit module operating status, and transmit the energy storage unit module operating status to the user-side interaction unit and the event triggering perception and response unit; the event triggering perception and response unit designs an event triggering mechanism for the energy storage unit module operating status, and monitors, identifies, and responds, and transmits the triggering event flag to the micro-energy network shared energy storage service provider operation platform; the micro-energy network shared energy storage service provider operation platform is used to perform optimal day-ahead allocation and intra-day dynamic allocation of shared energy storage capacity; The shared energy storage lower layer instruction distribution and control module is used to distribute the control instructions of the shared energy storage upper layer remote monitoring and control module to the energy storage unit module topology connection module.

3. A method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering, characterized by: include: Determine the types of events during the operation of shared energy storage in the micro-energy grid, including active events and passive events; Design passive event triggering methods; Record event trigger flags and summarize them on the shared energy storage service provider’s operation platform; When an event is triggered, the event trigger flag is transmitted to the micro-energy network shared energy storage operation service provider operation platform, and the micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module.

4. The method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering according to claim 3 is characterized by: The event types include active events and passive events; Active events refer to events such as: during the operation of shared energy storage in the micro-energy network, the shared energy storage service provider's operation platform issues instructions, and the shared energy storage service provider's operation platform tracks whether the shared energy storage capacity allocation is completed; Passive events refer to: during the operation of shared energy storage in the micro-energy grid, the number of electric vehicles charged increases / decreases or the photovoltaic output increases / decreases suddenly; when a passive event is triggered, the shared energy storage service provider's operating platform will re-formulate the optimal capacity allocation plan based on the status of all micro-energy grid units in the micro-energy grid and the current shared energy storage allocation results.

5. The method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering according to claim 3 is characterized by: After the event is triggered, the event trigger flag is transmitted to the micro-energy network shared energy storage operation service provider operation platform, and the micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower layer instruction allocation and control module; The micro-energy grid shared energy storage operation service provider operation platform includes: the day-ahead optimal allocation of the micro-energy grid shared energy storage and the intra-day dynamic allocation of the micro-energy grid shared energy storage; The day-ahead optimal allocation of the micro-energy grid shared energy storage: when the micro-energy grid shared energy storage service provider operation platform starts running, it is necessary to initialize the optimal allocation of the shared energy storage device according to the typical daily load and photovoltaic output of the micro-energy grid; The intraday dynamic allocation of the micro-energy network shared energy storage: when the micro-energy network shared energy storage service provider operation platform operates normally, it is necessary to reallocate the capacity of the shared energy storage device at the next moment according to the event triggering mark and the load and photovoltaic output conditions at the time of event triggering.

6. The method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering according to claim 5 is characterized by: The method for optimal day-ahead allocation of micro-energy grid shared energy storage comprises: Step 41. Determine the quantity and status of energy storage unit modules and micro energy grid units of the shared energy storage device; According to the shared energy storage upper-layer remote monitoring and control module, the number and status of the energy storage unit modules and micro-grid units of the shared energy storage device are obtained, and the status of the energy storage unit modules of each shared energy storage device is marked or updated in each monitoring cycle; the micro-grid units participating in the shared energy storage are determined, and the main grid power supply at the typical daily collection time t of the micro-grid unit i is recorded Photovoltaic output Load data Electric vehicle charging station charging data Step 42: Initialize and evenly distribute the energy storage unit modules of the shared energy storage device to the micro energy grid units. The number of energy storage unit modules of the shared energy storage device distributed to the micro energy grid unit i is n. i , combined into a storage unit module set Ω of micro energy grid unit i on the shared energy storage service provider operation platform i ; Step 43. Establish an optimization model for optimal allocation of shared energy storage in micro-energy grid units; Calculate the self-power supply rate of shared energy storage participating in the operation of micro-grid unit i in, represents the power injected by the main grid into micro-grid unit i at time t, represents the load power of micro-grid unit i at time t, in represents the basic life electricity load of micro-grid unit i at time t, and They represent the charging power and discharging power of the energy storage unit at time t allocated to the shared energy storage of micro-grid unit i, respectively. and They represent the charging and discharging status of the energy storage unit allocated to the micro-grid unit i by the shared energy storage service provider at time t, Indicates that it is in charging state. Indicates that it is not charging. Similarly, the energy storage device cannot be charged and discharged at the same time. Charging power The capacity of the energy storage unit assigned to the micro-grid unit i Photovoltaic output And main network supply jointly determined; in, represents the amount of electricity allocated to the energy storage device of micro-grid unit i at time t, represents the capacity of the energy storage device assigned to micro-grid unit i at time t, represents the charge state of the energy storage device assigned to micro-grid unit i at time t, n i represents the number of energy storage unit modules of the energy storage device connected to the micro-energy grid unit i, B storage_unit is the standard battery unit capacity; Indicates the charging efficiency of the energy storage device; Discharge power The capacity of the energy storage unit assigned to the micro-grid unit i Photovoltaic output And main network supply jointly determined; Step 44. Determine the objective function and constraint conditions of the shared energy storage optimal allocation optimization model; Establish the objective function G of the self-power supply rate of the micro-grid unit after participating in shared energy storage self : Based on the energy storage unit module capacity and charge and discharge status of the energy storage device As a decision variable, with the self-power supply rate as the objective function, the energy storage device needs to satisfy the constraint set C, and the optimal conventional capacity allocation is solved by the CPLEX commercial solver; in, represents the maximum charging / discharging power of the energy storage unit module set Ωi of the micro energy grid unit i; Indicates that the power of the energy storage unit module set Ωi of the micro energy grid unit i maintains energy conservation after one scheduling cycle; Step 45. The shared energy storage service provider operation platform solves the shared energy storage optimal allocation model in the micro-energy grid unit, and sends the capacity allocation result to the shared energy storage lower-layer instruction allocation and control module to complete the optimal allocation of shared energy storage capacity; The method for intraday dynamic allocation of micro-energy grid shared energy storage includes: Obtain the load and photovoltaic output status when the event is triggered; Update the load and PV output parameters in the day-ahead optimal allocation solution model; The shared energy storage service provider operates a platform to solve the optimal allocation model of shared energy storage in the micro-energy grid unit; Sent to the lower-level command distribution and control module of shared energy storage.

7. The method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering according to claim 6 is characterized by: The method of solving the shared energy storage optimal allocation model includes: Obtain the typical daily load and photovoltaic output of each micro-grid unit for planning the allocation of shared energy storage capacity on the day before, or the load and photovoltaic output of each micro-grid unit at the time of event triggering for reallocation of shared energy storage in response to event triggering; Establish a model for the operation of shared energy storage in micro-energy grids, including optimization objectives, constraints and power flow calculation methods; Configure the solution parameters of the CPLEX commercial solver, check the solution results, and obtain the optimal allocation of shared energy storage on the day before or within the day.

8. An event-triggered micro-energy grid shared energy storage dynamic capacity allocation device, used to implement the steps of any one of the event-triggered micro-energy grid shared energy storage dynamic capacity allocation methods described in claims 4-7, characterized in that: include: An event type determination module is used to determine the event type during the operation of shared energy storage in the micro-energy grid, including active events and passive events; Trigger method design module, used to design passive event trigger method; The recording and aggregation module is used to record event triggering signs and summarize them by the shared energy storage service provider operation platform; The transmission and reallocation module is used to transmit the event trigger flag to the micro-energy network shared energy storage operation service provider operation platform when the event is triggered. The micro-energy network shared energy storage operation service provider operation platform reallocates the shared energy storage capacity and sends it to the shared energy storage lower-level instruction allocation and control module.

9. A computer device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that: When the processor executes the computer program, the steps of a method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering as described in any one of claims 3 to 7 are implemented.

10. A computer storage medium, characterized in that: The computer storage medium stores a computer program, and when the computer program is executed by the processor, the steps of a method for allocating dynamic capacity of micro-energy grid shared energy storage based on event triggering described in any one of claims 3 to 7 are implemented.

Images