Virtual power plant aggregation transaction unit dynamic construction method and system based on application scene

Abstract

The invention discloses a virtual power plant aggregation transaction unit dynamic construction method and system based on an application scene. The method comprises the steps that a demand side resource adjustment demand initiated by a power grid dispatching end is received, and the adjustment demand comprises an application type, a power grid area with a variable-line-station as a boundary and a capacity demand; sending the adjustment demand to a virtual power plant operation and management platform through a power grid dispatching end, and querying based on the adjustment demand by the virtual power plant operation and management platform to form an aggregation user list; the virtual power plant operator dynamically creates an aggregation transaction unit based on the predefined constraint of the corresponding application scene according to the application type and the aggregation user list, and registers the aggregation transaction unit on a virtual power plant operation and management platform; and the aggregation transaction unit is a basic unit for the virtual power plant to participate in power grid regulation and control and market transaction. According to the scheme, the information barrier existing between the power grid company and the virtual power plant operator is overcome.

Description

Technical Field

[0001] The present invention belongs to the field of virtual power plant aggregation, and in particular relates to a method and system for dynamically constructing a virtual power plant aggregation transaction unit based on an application scenario. Background Art

[0002] A virtual power plant (VPP) is an intelligent control technology and business model that aggregates demand-side adjustable resources (including distributed power sources, adjustable loads, and energy storage) in grid dispatching and directly participates in grid dispatching and control and power market transactions. The resources aggregated by virtual power plants are widely distributed at different levels of the grid, so it is necessary to consider the topological structure and section safety constraints of the grid in order to accurately estimate the aggregated regulation potential of virtual power plants, reasonably decompose the regulation targets, and scientifically achieve the power and electricity balance of the new power system.

[0003] However, there is an information barrier between the power grid company and the virtual power plant operator. On the one hand, the power grid company has the topology information of the power grid and knows the safety constraints of the sections, but does not have the detailed information of the adjustable resources; on the other hand, the virtual power plant operator has detailed monitoring data, historical data and regulation characteristic data of the resources, but does not have the topology information of the power grid and the safety constraints of the sections. The above information barriers make it difficult to implement precise regulation. Summary of the invention

[0004] In order to address the deficiencies in the prior art, the present invention provides a method and system for dynamically constructing aggregated transaction units of virtual power plants based on application scenarios, so as to solve the technical problem of further creating an aggregated transaction unit hierarchy based on the existing virtual power plant architecture.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0006] The present invention first discloses a method for dynamically constructing a virtual power plant aggregation transaction unit based on an application scenario, the method comprising the following steps: Step 1: receiving a demand-side resource adjustment demand initiated by a power grid dispatching end, wherein the adjustment demand includes an application type, a power grid area with a transformer-line-station as a boundary, and a capacity demand; Step 2: The regulation demand is sent to the virtual power plant operation management platform through the power grid dispatching terminal, and the virtual power plant operation management platform performs inquiries based on the regulation demand to form an aggregated user list; Step 3: The virtual power plant operator dynamically creates an aggregate trading unit based on the application type and the aggregate user list and the predefined constraints of the corresponding application scenario, and registers the aggregate trading unit on the virtual power plant operation and management platform; the aggregate trading unit is the basic unit for the virtual power plant to participate in grid regulation and market transactions.

[0007] The present invention further includes the following preferred embodiments: The static parameters of the aggregated trading unit include the resource type, resource response capability and electrical access point. The resource type includes power source type, load type and energy storage type; the resource response capability includes direct control type, scheduling type and response type; the electrical access point represents the boundary of the power grid area where the aggregated resources are located.

[0008] The dynamic parameters of the aggregate transaction unit include unit capacity, response duration, response rate and adjustment accuracy.

[0009] In the regulation demand, the application types include demand response, auxiliary services, and grid regulation; the capacity demand is the required total regulation capacity, the demand response includes peak shaving and valley filling, the auxiliary services include peak shaving, frequency regulation, and standby, and the grid regulation includes local congestion management.

[0010] The virtual power plant operation and management platform performs a query based on the regulation demand to form an aggregated user list, further comprising: Step 3.1: The virtual power plant operation and management platform determines the resource type and response capability matching the application type through a mapping table according to the application type; Step 3.2: The virtual power plant operation and management platform calls Figure 1 The network platform uses the grid area and resource type as query conditions to obtain a list of users that meet the conditions; Step 3.3: The virtual power plant operation and management platform further screens the list of users that meet the conditions according to the response capability attributes of the stored aggregated resources; Step 3.4: The virtual power plant operation and management platform forms an aggregated user list based on the stored association relationship between the virtual power plant and the aggregated users, and sends it to each virtual power plant operator together with the application type.

[0011] The method further comprises: When the application type or grid area changes, the aggregated trading unit is rebuilt; When the binding and unbinding relationship between the virtual power plant operator and its proxy users changes dynamically, the relationship between the virtual power plant and the aggregated resources is updated according to the notification of the virtual power plant operator, and the list of users who meet the conditions is re-screened; When the grid topology changes or the distribution network is reconfigured, the resource type and response capability that match the application type are re-determined.

[0012] The dynamically creating an aggregated transaction unit based on the predefined constraints of the corresponding application scenario further includes: For the aggregated trading units participating in global demand response, the following construction constraints are set: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: the same as the aggregation scope of the aggregated trading units participating in peak load regulation; 3) Resource type: The aggregated transaction unit aggregates resources of the same type, and the continuous response time of the resources is not less than 1 hour; For the aggregated trading units participating in the regional demand response, the following construction constraints are set: 1) Minimum capacity: no less than 1MW; 2) Aggregation range: For areas with obstructions, the voltage level is 10kV~35kV; 3) Resource type: The aggregated transaction unit aggregates resources of the same type, and the continuous response time of the resources is not less than 1 hour; For the aggregated trading units participating in peak load regulation, set the following construction constraints: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: Aggregation trading units are constructed with transformers with local congestion as regional boundaries, and the corresponding voltage levels are 10kV~220kV; for peak load regulation services aimed at absorbing surplus new energy, aggregation trading units are constructed with new energy surplus areas as boundaries; if there is no local congestion or new energy absorption problem, aggregation trading units are constructed according to distribution network areas, and the corresponding voltage levels are 110kV~220kV; 3) Resource type: The aggregated transaction unit aggregates resources of the same type, and the continuous response time of the resources is not less than 1 hour; For the aggregated trading units participating in secondary frequency modulation, set the following construction constraints: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: the same as the aggregation scope of the aggregated trading units participating in peak load regulation; 3) Resource type: The aggregation trading unit only aggregates energy storage resources; For the aggregated trading units participating in voltage regulation, set the following construction constraints: 1) Minimum capacity: no less than 1MW; 2) Aggregation scope: Aggregation trading units are constructed based on the boundaries of power grid areas where voltage exceeds the limit, and the corresponding voltage level is 10kV~110kV; 3) Resource type: The aggregation trading unit aggregates resource types with reactive power adjustment capabilities.

[0013] The present invention also discloses a system for dynamically constructing a virtual power plant aggregate transaction unit based on an application scenario using the aforementioned method for dynamically constructing a virtual power plant aggregate transaction unit based on an application scenario, comprising: An adjustment demand receiving module is used to receive a demand-side resource adjustment demand initiated by a power grid dispatching end, wherein the adjustment demand includes an application type, a power grid area with a transformer-line-station as a boundary, and a capacity demand; A user list determination module is used to send the regulation demand to the virtual power plant operation management platform through the power grid dispatching terminal, and the virtual power plant operation management platform performs inquiries based on the regulation demand to form an aggregated user list; The aggregate transaction unit building module is used by the virtual power plant operator to dynamically create an aggregate transaction unit based on the application type and the aggregate user list, based on the predefined constraints of the corresponding application scenario, and register the aggregate transaction unit on the virtual power plant operation and management platform; the aggregate transaction unit is the basic unit for the virtual power plant to participate in power grid regulation and market transactions.

[0014] Accordingly, the present application also discloses a terminal, including a processor and a storage medium; The storage medium is used to store instructions; The processor is used to operate according to the instructions to execute the steps of the aforementioned method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios.

[0015] Correspondingly, the present application also discloses a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the aforementioned method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios are implemented.

[0016] The beneficial effect of the present invention is that, compared with the prior art, the present invention provides a method and system for dynamically constructing virtual power plant aggregate trading units based on application scenarios, which participates in power grid regulation and market transactions with aggregate trading units as basic units, considers power grid topology constraints, and gives full play to the responsiveness of different resources, thereby improving the accuracy and effectiveness of virtual power plant regulation; better adapting to the dynamic requirements of different areas and time periods of the power grid for flexible resources. At the same time, it can also better match the spatiotemporal changes in demand-side regulation capabilities with the real-time needs of the power grid; through power grid dispatching, new load management systems, and a Figure 1 The orderly information exchange between the network platform and the virtual power plant operator platform completes the efficient construction of the aggregated transaction unit in an event-driven manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the power grid area in the present invention.

[0018] Figure 2 It is a hierarchical relationship diagram of the virtual power plant in the present invention.

[0019] Figure 3 It is a diagram of the dynamic construction process of the aggregated transaction unit in the present invention.

[0020] Figure 4 This is a diagram of the implementation process of the aggregated trading unit in the present invention participating in the day-ahead demand response.

[0021] Figure 5 It is a diagram of the implementation process of the aggregated trading unit participating in peak load regulation in the present invention.

[0022] Figure 6 It is a diagram of the implementation process of the aggregated trading unit participating in frequency modulation in the present invention.

[0023] Figure 7 It is a diagram of the implementation process of the aggregated transaction unit participating in accident backup in the present invention.

[0024] Figure 8 It is a diagram of the implementation process of the aggregated transaction unit in the present invention participating in local congestion management.

[0025] Fig. 9 It is a diagram of the implementation process of the aggregated trading unit in the present invention participating in emergency control of the power grid. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] The embodiments described in this application are only some embodiments of the present invention, not all embodiments. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the protection scope of the present invention.

[0028] In view of the shortcomings of the prior art, the present invention proposes a method and system for dynamically constructing an aggregated trading unit of a virtual power plant based on application scenarios, which overcomes the information barriers between power grid companies and virtual power plant operators. And for multiple application scenarios, a control process of the aggregated trading unit is formed. By constructing an aggregated trading unit, the problems of resource diversity within the virtual power plant, the problem of virtual power plant resources spanning multiple power grid areas, and the problem of virtual power plants participating in the electricity market are solved. First, the definition and external characteristic parameters of the aggregated trading unit are given, and then a dynamic construction method of the aggregated trading unit is proposed, and a control process of the aggregated trading unit is formulated for multiple application scenarios. Finally, an example of dynamic construction of the aggregated trading unit is given.

[0029] The aggregated trading unit described in the present invention is an aggregate of adjustable resources with similar regulation characteristics belonging to the same power grid area in the same virtual power plant, and is the basic unit for the virtual power plant to participate in power grid regulation and market transactions.

[0030] The grid area is an open-loop power supply network with transformer-line-station as the boundary. Aggregate resources are connected to the grid step by step through "transformer (substation)-line-station (110 / 220kV)". Depending on the size, the aggregated trading unit is equivalent to a certain level of transformer-line-station. Typical grid areas include: a 10 / 35kV substation, a 110kV tie line power supply area, and a 220kV transformer power supply area. Figure 1 This is a schematic diagram of power grid areas with different voltage levels. The grid is hierarchical and partitioned to achieve power and electricity balance, so as to reduce the phenomenon of distributed resources redistributing power or electricity through higher voltage levels, reduce grid losses, increase the local consumption rate of renewable energy, optimize resource allocation, and improve grid security and economy.

[0031] The adjustable resources refer to user resources that can be aggregated. Each adjustable resource should have the following attributes: 1) Resource types: including power sources (distributed photovoltaic, diesel generation, trigeneration, etc.), loads (buildings, data centers, electric vehicles, etc.), energy storage (communication base station backup energy storage, other user-side energy storage, etc.); 2) Resource response capability: including direct control, dispatching, and response. Among them, the direct control type can directly control the power of resources, and its response time (including communication time and resource body response time) meets the secondary frequency regulation requirements; the dispatching type can indirectly control the power of resources (such as by adjusting the air conditioning temperature), and its response time meets the peak regulation requirements; the response type can influence its power or electricity through price or incentive means, and the response time meets the demand response requirements such as peak shaving and valley filling; 3) Electrical access point: refers to the transformer-line-station to which the resources are connected. The aggregated trading unit aggregates the resources under the same electrical access point, and uses the transformer-line-station to which it is equivalently connected as its electrical access point. The electrical access point of the aggregated trading unit is the boundary of the power grid area where its aggregated resources are located. Depending on the capacity of the aggregated trading unit, the voltage level of its electrical access point can be 10kV~220kV.

[0032] After forming an aggregated trading unit, the virtual power plant will look like this: Figure 2 The hierarchical relationship shown. Figure 2 In the , each adjustable resource belongs to a different aggregation trading unit, and each aggregation trading unit has two important attributes: resource type and power grid area. The resource type attribute enables the aggregation trading unit to aggregate only the same type of resources, which is convenient for forming aggregation characteristics; the power grid area attribute is identified by the electrical access point associated with the aggregation trading unit, which enables it to have topological traceability capabilities.

[0033] If all resources of a virtual power plant are of one type, are located in the same 220kV node area and congestion is not considered, the entire virtual power plant can be regarded as an aggregated trading unit, and the 220kV node is its electrical access point.

[0034] In a further embodiment, the static parameters of the aggregated transaction unit include the resource type, resource response capability and electrical access point. An aggregated transaction unit usually aggregates the same type of resources. If multiple resources with similar regulation characteristics are aggregated, one type of resource is used as the main one.

[0035] The dynamic parameters of the aggregate transaction unit include: Unit capacity: including rated capacity, increased capacity, decreased capacity, etc.; Response duration: Load and energy storage units should provide this parameter; Response rate: including up-regulation rate and down-regulation rate; Adjustment accuracy: Different adjustment accuracy evaluation intervals can be set (such as every 15 minutes, every 1 hour) depending on the type of market in which the aggregated trading unit participates.

[0036] In order to be compatible with various aggregated trading units of source, load and energy storage, a unified power supply assumption is adopted. For example, for adjustable load units, "upward adjustment" means reducing electricity consumption relative to the benchmark power; for energy storage units, "upward adjustment" means discharging.

[0037] The method for dynamically constructing a virtual power plant aggregation transaction unit based on an application scenario disclosed in the present invention comprises the following steps: Step 1: Receive a demand-side resource regulation demand initiated by a power grid dispatching end, wherein the regulation demand includes an application type, a power grid area with a transformer-line-station as a boundary, and a capacity demand.

[0038] In the present invention, the dynamic construction of the aggregated trading unit refers to the construction of the aggregated trading unit on demand according to the dynamic requirements for flexibility resources in different areas and time periods of the power grid. Figure 3 As shown in Figure 1, this process is triggered by the grid dispatching's regulation demand. The grid dispatching implements the day-ahead forecast and proposes the regulation demand for demand-side flexibility resources. The regulation demand includes: (1) application type: including demand response (peak shaving, valley filling), ancillary services (peak shaving, frequency regulation, standby, etc.), grid regulation (local congestion management, etc.); (2) grid area: the grid area where the above applications are implemented, with transformer-line-station as the boundary; (3) capacity demand: the total regulation capacity required.

[0039] Step 2: The regulation demand is sent to the virtual power plant operation and management platform through the power grid dispatching terminal. The virtual power plant operation and management platform performs inquiries based on the regulation demand to form an aggregated user list.

[0040] Specifically, the step 2 further comprises the following process: Step 2.1: The virtual power plant operation and management platform determines the resource type and response capability that matches the application type according to the following mapping table 1 based on the application type.

[0041] Step 2.2: Virtual power plant operation and management platform calls Figure 1 The network platform uses the grid area and resource type as query conditions to obtain a list of users that meet the conditions; Step 2.3: The virtual power plant operation and management platform further screens the list of users that meet the conditions according to the response capability attributes of the stored aggregated resources; Step 2.4: Finally, the virtual power plant operation and management platform forms an aggregated user list according to the stored association relationship between the virtual power plant and the aggregated users, and sends it to each virtual power plant operator together with the application type.

[0042] Table 1

[0043] Step 3: The virtual power plant operator dynamically creates an aggregated trading unit based on the application type and the aggregated user list and the predefined constraints of the corresponding application scenario, and registers the aggregated trading unit on the virtual power plant operation and management platform.

[0044] In order to improve the construction efficiency, the present invention further introduces an event-driven mechanism in the dynamic construction process of aggregated transactions. Specifically, when the application type and the power grid area received by the virtual power plant operation and management platform have not changed, there is no need to rebuild the aggregated transaction unit, so that the stability of the aggregated transaction unit can be maintained for a period of time; when the application type or the power grid area changes, the aggregated transaction unit needs to be rebuilt. When the binding and unbinding relationship between the virtual power plant operator and its proxy users changes dynamically, the virtual power plant operator should promptly notify the virtual power plant operation and management platform to update the relationship between the virtual power plant and the aggregated resources. At this time, step 2.3 needs to be re-executed, that is, the list of users who meet the conditions needs to be re-screened. When the power grid topology changes or the distribution network is reconstructed, some resources may switch to different electrical access points, thereby changing the electrical traceability relationship. At this time, step 2.1 should be re-executed, that is, the resource type and response capability that match the application type should be re-determined.

[0045] The present invention further clarifies the constraints that need to be followed when constructing an aggregated transaction unit in different application scenarios, including minimum capacity requirements, resource types, etc.

[0046] For the aggregated trading units participating in global demand response, the following construction constraints are set: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: the same as the aggregation scope of the aggregated trading units participating in peak load regulation; 3) Resource type: In order to accurately calculate the load baseline of the aggregated trading unit, the aggregated trading unit aggregates the same type of resources, and the continuous response time of the resources is not less than 1 hour.

[0047] For the aggregated trading units participating in the regional demand response, the following construction constraints are set: 1) Minimum capacity: not less than 1MW.

[0048] 2) Aggregation range: For areas with congestion, the voltage level is 10kV~35kV.

[0049] 3) Resource type: In order to accurately calculate the load baseline of the aggregated trading unit, the aggregated trading unit aggregates the same type of resources, and the continuous response time of the resources is not less than 1 hour.

[0050] For the aggregated trading units participating in peak load regulation, set the following construction constraints: 1) Minimum capacity: not less than 5MW.

[0051] 2) Aggregation scope: follow the following principle, that is, the participation of aggregated trading units in peak load regulation may cause regional power grid overload. To this end, the aggregated trading unit should be constructed with the transformer with local blockage as the regional boundary (access point), and the corresponding voltage level is 10kV~220kV; for peak load regulation services aimed at absorbing surplus new energy, the aggregated trading unit should be constructed with the surplus new energy area as the boundary to dispatch local resources as much as possible to complete local consumption; if there is no local blockage or new energy consumption problem, the aggregated trading unit should be constructed according to the distribution network area, and the corresponding voltage level is 110kV~220kV.

[0052] 3) Resource type: In order to accurately calculate the load baseline of the aggregated trading unit, the aggregated trading unit aggregates the same type of resources, and the continuous response time of the resources is not less than 1 hour.

[0053] For the aggregated trading units participating in secondary frequency modulation, set the following construction constraints: 1) Minimum capacity: not less than 5MW.

[0054] 2) Aggregation scope: the same as the aggregation scope of the aggregated trading units participating in peak load regulation.

[0055] 3) Resource type: To ensure the secondary frequency regulation response performance, the aggregation trading unit only aggregates energy storage resources (including charging and swapping stations).

[0056] For the aggregated trading units participating in voltage regulation, set the following construction constraints: 1) Minimum capacity: not less than 1MW.

[0057] 2) Aggregation scope: Aggregation trading units are constructed based on the boundaries (access points) of the power grid areas where voltage exceeds the limit, and the corresponding voltage levels are 10kV~110kV.

[0058] 3) Resource type: The aggregation trading unit aggregates resource types with reactive power adjustment capabilities, such as user-side energy storage, electric vehicles, etc.

[0059] In order to make the solution of the present invention clearer, the following describes in detail examples of the dynamic construction and regulation process of the aggregated transaction unit for different application scenarios.

[0060] Scenario 1: Aggregate trading units participate in market-based demand response Today’s stage: (1) Grid dispatch publishes demand response requirements, including the grid area, time period, duration, and total capacity requirements to be implemented; (2) Each virtual power plant operator completes the dynamic construction of the aggregated trading unit and registers on the virtual power plant operation and management platform; (3) Each virtual power plant bids in the form of aggregated trading units, and quotes volume without quotation or quotes volume and quotation; (4) The power grid completes clearing and verifies that the clearing results of each aggregated trading unit will not cause local congestion.

[0061] Intraday stage: (1) The virtual power plant controls each aggregated trading unit to implement demand response based on the clearing results; (2) The virtual power plant operation and management platform records the actual response of each aggregated trading unit.

[0062] Settlement phase: (1) The virtual power plant operation and management platform calculates the load baseline of each aggregated trading unit; (2) The power grid calculates compensation based on the actual response of each aggregated trading unit.

[0063] Detailed process as Figure 4 shown.

[0064] Scenario 2: Aggregate trading units participate in the ancillary services market For virtual power plants with frequency regulation capabilities and direct access to the dispatching system, the dispatching system will issue regulation instructions to the technical support system of the virtual power plant operator; for virtual power plants that do not require a response in seconds (such as peak regulation), the new power load management system will forward transaction results or regulation requirements to the technical support system of the virtual power plant operator. Virtual power plant operators will decompose and organize the execution plan of aggregated resources according to the regulation requirements. Virtual power plant operators can adopt different regulation methods according to power regulation needs and resource categories. During normal operation, virtual power plant operators can optimize and control aggregated resources on their own, and the new power load management system will not directly regulate them. When an emergency occurs in the power grid, the new power load management system receives dispatch instructions and directly adjusts the adjustable load resources.

[0065] Scenario 2.1: Aggregate trading units participate in peak load regulation Today’s stage: (1) The control center initiates the peak load demand and time period, and the trading center issues a trading announcement; (2) Each virtual power plant operator completes the dynamic construction of the peak-shaving aggregation trading unit and registers on the virtual power plant operation and management platform; (3) The virtual power plant operation and management platform forwards the transaction announcement and organizes the declaration; (4) Virtual power plants complete quotation and quotation in aggregated trading units; (5) The Control Center conducts security verification and completes the clearance, and the Trading Center announces the winning bid results; (6) The virtual power plant operation and management platform forwards the winning bid results of each unit.

[0066] Intraday stage: (1) The virtual power plant controls each aggregated trading unit to participate in peak load regulation based on the clearing results; (2) The virtual power plant operation and management platform records the actual response of each aggregated trading unit.

[0067] Settlement phase: (1) The virtual power plant operation and management platform completes the execution effect calculation and issues a detailed execution effect statement; (2) The trading center discloses the details of the execution effect, and the virtual power plant operator confirms the details of the execution effect; the trading center issues the settlement basis; the power load management center settles on a monthly basis; the virtual power plant operator and the user receive the settlement fee.

[0068] Detailed process as Figure 5 shown.

[0069] Scenario 2.2: Aggregate trading units participate in frequency modulation The regulation process is similar to peak load regulation. However, on the execution day, the dispatching system directly issues regulation instructions to the technical support system of the virtual power plant operator. Figure 6 shown.

[0070] Scenario 2.3: Aggregate trading unit participates in accident backup The reserve demand (reserve type, capacity, time period) is initiated by the control center and organized by the power load management center; the virtual power plant reports the quantity and quotation in the aggregated trading unit; the control center conducts safety verification and completes the clearing; after receiving the winning bid, the virtual power plant arranges each aggregated trading unit to reduce the load during the standby period according to the standby winning bid; the power load management center monitors the actual implementation effect. The detailed process is as follows Figure 7 shown.

[0071] Scenario 3: Aggregate trading units participate in local congestion management When the control center predicts that there is congestion in the local distribution network (for example, a 110kV transformer), it will dynamically build an aggregated trading unit in the area to accurately implement local congestion management. The detailed process is as follows: Figure 8 shown.

[0072] Scenario 4: Aggregate trading units participate in emergency regulation When an unexpected event such as equipment failure occurs in the power grid, resulting in a regional or local power supply gap, the power grid initiates emergency regulation. In the early preparation stage, the power load management center signs an emergency regulation agreement with the virtual power plant operator. When there is a power supply gap due to a sudden power grid failure, the control center issues a real-time load regulation instruction; the power load management center completes the dynamic construction of the aggregated trading unit in the designated power grid area, receives and converts the real-time load regulation instruction; the virtual power plant decomposes the real-time load regulation instruction to each aggregated trading unit, and each aggregated trading unit completes the load regulation. The detailed process is as follows: Fig. 9 shown.

[0073] The beneficial effect of the present invention is that, compared with the prior art, the present invention provides a method and system for dynamically constructing virtual power plant aggregate trading units based on application scenarios, which participates in power grid regulation and market transactions with aggregate trading units as basic units, considers power grid topology constraints, and gives full play to the responsiveness of different resources, thereby improving the accuracy and effectiveness of virtual power plant regulation; better adapting to the dynamic requirements of different areas and time periods of the power grid for flexible resources. At the same time, it can also better match the spatiotemporal changes in demand-side regulation capabilities with the real-time needs of the power grid; through power grid dispatching, new load management systems, and a Figure 1 The orderly information exchange between the network platform and the virtual power plant operator platform completes the efficient construction of the aggregated transaction unit in an event-driven manner.

[0074] The present invention may be a system, a method and / or a computer program product. The present invention also discloses a virtual power plant aggregate transaction unit dynamic construction system based on application scenarios based on the aforementioned virtual power plant aggregate transaction unit dynamic construction method based on application scenarios, including: An adjustment demand receiving module is used to receive a demand-side resource adjustment demand initiated by a power grid dispatching end, wherein the adjustment demand includes an application type, a power grid area with a transformer-line-station as a boundary, and a capacity demand; A user list determination module is used to send the regulation demand to the virtual power plant operation management platform through the power grid dispatching terminal, and the virtual power plant operation management platform performs inquiries based on the regulation demand to form an aggregated user list; The aggregate transaction unit building module is used by the virtual power plant operator to dynamically create an aggregate transaction unit based on the application type and the aggregate user list, based on the predefined constraints of the corresponding application scenario, and register the aggregate transaction unit on the virtual power plant operation and management platform; the aggregate transaction unit is the basic unit for the virtual power plant to participate in power grid regulation and market transactions.

[0075] Based on the spirit of the present invention, those skilled in the art can easily think that a computer program product can be obtained based on the aforementioned method for dynamically constructing an aggregated transaction unit of a virtual power plant based on an application scenario. The computer program product may include a computer-readable storage medium on which are loaded computer-readable program instructions for enabling a processor to implement various aspects of the present disclosure. That is, the present application also includes a terminal, including a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the aforementioned method for dynamically constructing an aggregated transaction unit of a virtual power plant based on an application scenario.

[0076] Computer readable storage medium can be a tangible device that can keep and store the instructions used by the instruction execution device. Computer readable storage medium can be, for example, - but not limited to - electrical storage device, magnetic storage device, optical storage device, electromagnetic storage device, semiconductor storage device or any suitable combination of the above. More specific examples (non-exhaustive list) of computer readable storage medium include: portable computer disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD), memory stick, floppy disk, mechanical encoding device, such as punch card or groove protrusion structure with instructions stored thereon and any suitable combination of the above. Computer readable storage medium used here is not interpreted as instantaneous signal itself, such as radio wave or other free propagating electromagnetic wave, electromagnetic wave propagated by waveguide or other transmission medium (for example, light pulse by optical fiber cable) or electrical signal transmitted by wire.

[0077] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0078] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, by using the state information of the computer-readable program instructions to personalize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit may execute the computer-readable program instructions, thereby implementing various aspects of the present disclosure.

[0079] 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, and any modifications or equivalent replacements that do 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 method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios, characterized in that: The following steps are involved: Step 1: receiving a demand-side resource adjustment demand initiated by a power grid dispatching end, wherein the adjustment demand includes an application type, a power grid area with a transformer-line-station as a boundary, and a capacity demand; Step 2: The regulation demand is sent to the virtual power plant operation management platform through the power grid dispatching terminal, and the virtual power plant operation management platform performs inquiries based on the regulation demand to form an aggregated user list; Step 3: The virtual power plant operator dynamically creates an aggregate trading unit based on the application type and the aggregate user list and the predefined constraints of the corresponding application scenario, and registers the aggregate trading unit on the virtual power plant operation and management platform; the aggregate trading unit is the basic unit for the virtual power plant to participate in grid regulation and market transactions.

2. The method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios according to claim 1 is characterized in that: The static parameters of the aggregated trading unit include the resource type, resource response capability and electrical access point. The resource type includes power source type, load type and energy storage type; the resource response capability includes direct control type, scheduling type and response type; the electrical access point represents the boundary of the power grid area where the aggregated resources are located.

3. The method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios according to claim 2 is characterized in that: The dynamic parameters of the aggregate transaction unit include unit capacity, response duration, response rate and adjustment accuracy.

4. The method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios according to claim 3 is characterized in that: In the regulation demand, the application types include demand response, auxiliary services, and grid regulation; the capacity demand is the required total regulation capacity, the demand response includes peak shaving and valley filling, the auxiliary services include peak shaving, frequency regulation, and standby, and the grid regulation includes local congestion management.

5. The method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios according to claim 4 is characterized in that: The virtual power plant operation and management platform performs a query based on the regulation demand to form an aggregated user list, further comprising: Step 5.1: The virtual power plant operation and management platform determines the resource type and response capability matching the application type through a mapping table according to the application type; Step 5.2: The virtual power plant operation and management platform calls the one-map-one-network platform, takes the power grid area and resource type as query conditions, and obtains a list of users that meet the conditions; Step 5.3: The virtual power plant operation and management platform further screens the list of users that meet the conditions according to the response capability attributes of the stored aggregated resources; Step 5.4: The virtual power plant operation and management platform forms an aggregated user list based on the stored association relationship between the virtual power plant and the aggregated users, and sends it to each virtual power plant operator together with the application type.

6. The method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios according to claim 5 is characterized in that: The method further comprises: When the application type or grid area changes, the aggregated trading unit is rebuilt; When the binding and unbinding relationship between the virtual power plant operator and its proxy users changes dynamically, the relationship between the virtual power plant and the aggregated resources is updated according to the notification of the virtual power plant operator, and the list of users who meet the conditions is re-screened; When the grid topology changes or the distribution network is reconfigured, the resource type and response capability that match the application type are re-determined.

7. The method for dynamically constructing a virtual power plant aggregation transaction unit based on application scenarios according to claim 6 is characterized in that: The dynamically creating an aggregated transaction unit based on the predefined constraints of the corresponding application scenario further includes: For the aggregated trading units participating in global demand response, the following construction constraints are set: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: the same as the aggregation scope of the aggregated trading units participating in peak load regulation; 3) Resource type: The aggregated transaction unit aggregates resources of the same type, and the continuous response time of the resources is not less than 1 hour; For the aggregated trading units participating in the regional demand response, the following construction constraints are set: 1) Minimum capacity: no less than 1MW; 2) Aggregation range: For areas with obstructions, the voltage level is 10kV~35kV; 3) Resource type: The aggregated transaction unit aggregates resources of the same type, and the continuous response time of the resources is not less than 1 hour; For the aggregated trading units participating in peak load regulation, set the following construction constraints: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: Aggregation trading units are constructed with transformers with local congestion as regional boundaries, and the corresponding voltage levels are 10kV~220kV; for peak load regulation services aimed at absorbing surplus new energy, aggregation trading units are constructed with new energy surplus areas as boundaries; if there is no local congestion or new energy absorption problem, aggregation trading units are constructed according to distribution network areas, and the corresponding voltage levels are 110kV~220kV; 3) Resource type: The aggregated transaction unit aggregates resources of the same type, and the continuous response time of the resources is not less than 1 hour; For the aggregated trading units participating in secondary frequency modulation, set the following construction constraints: 1) Minimum capacity: no less than 5MW; 2) Aggregation scope: the same as the aggregation scope of the aggregated trading units participating in peak load regulation; 3) Resource type: The aggregation trading unit only aggregates energy storage resources; For the aggregated trading units participating in voltage regulation, set the following construction constraints: 1) Minimum capacity: no less than 1MW; 2) Aggregation scope: Aggregation trading units are constructed based on the boundaries of power grid areas where voltage exceeds the limit, and the corresponding voltage level is 10kV~110kV; 3) Resource type: The aggregation trading unit aggregates resource types with reactive power adjustment capabilities.

8. A dynamic construction system of virtual power plant aggregation trading units based on application scenarios, characterized in that: include: An adjustment demand receiving module is used to receive a demand-side resource adjustment demand initiated by a power grid dispatching end, wherein the adjustment demand includes an application type, a power grid area with a transformer-line-station as a boundary, and a capacity demand; A user list determination module is used to send the regulation demand to the virtual power plant operation management platform through the power grid dispatching terminal, and the virtual power plant operation management platform performs inquiries based on the regulation demand to form an aggregated user list; The aggregate transaction unit building module is used by the virtual power plant operator to dynamically create an aggregate transaction unit based on the application type and the aggregate user list, based on the predefined constraints of the corresponding application scenario, and register the aggregate transaction unit on the virtual power plant operation and management platform; the aggregate transaction unit is the basic unit for the virtual power plant to participate in power grid regulation and market transactions.

9. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is used to operate according to the instructions to execute the steps of the method for dynamically constructing a virtual power plant aggregation transaction unit based on an application scenario according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method for dynamically constructing a virtual power plant aggregation transaction unit based on an application scenario as described in any one of claims 1 to 7 are implemented.

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