A distributed resource aggregation modeling method

Abstract

The present invention discloses a distributed resource aggregation modeling method, and the specific steps of the method include: S1: obtaining corresponding key ledger information from the power grid marketing service system through the dispatching automation system at all levels; S2: constructing the station-line-transformer-household main distribution network association model corresponding to the dispatching automation system at all levels according to the key ledger information and the data of other preset models; S3: respectively aggregating the distributed resources within the jurisdiction of the dispatching automation system at all levels according to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, and obtaining the corresponding aggregation control unit; S4: respectively hanging the aggregation control unit on the corresponding power grid control node, and obtaining the power grid panoramic model containing distributed resources for power spot market system clearing calculation. The present invention realizes the distributed resource aggregation that conforms to the modeling specification of the southern regional power spot market.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a distributed resource aggregation modeling method. Background Art

[0002] At present, distributed resources mainly participate in the day-ahead invitation of the demand-side response market, and rarely participate in the actual application of real-time control of the power grid. Distributed resource aggregators are different from traditional power plants. The physical nodes of large-scale distributed resources are scattered, information acquisition is difficult, and there are many stakeholders. They need to rely on high informatization to solve the complementarity and coordination problems between highly uncertain individual units. The distributed resource aggregation method is to use advanced technical means to integrate a large number of dispersed power units into an aggregate control unit with large regulation capacity, good response characteristics, and simpler regulation according to the operation purpose or external environment, so as to give full play to the regulation potential of various power units and meet the conditions for participating in the clearing of the electricity spot market.

[0003] In order to achieve orderly aggregation of distributed resources, researchers have proposed many solutions, such as aggregating the same type of power generation units to achieve spatial superposition of electric energy, increase the scale and adjustable capacity of the aggregate; aggregating different types of power generation units to form temporal complementarity of electric energy, effectively smooth out output intermittent and fluctuating; the aggregation of power sources and distributed resources is conducive to maximizing the utilization of electric energy and ensuring economic efficiency. However, most solutions only optimize the regulation benefits or flexibility from the perspective of the aggregator, and do not consider the regulation safety from the perspective of the power grid, and lack aggregation solutions that are consistent with the modeling specifications of the power spot market. Summary of the invention

[0004] In order to solve the technical problems that the existing distributed resource aggregation technology does not consider the control safety from the perspective of the power grid and lacks compliance with the modeling specifications of the power spot market, the present invention provides a distributed resource aggregation modeling method. The technical solution adopted by the present invention is:

[0005] A first aspect of the present invention provides a distributed resource aggregation modeling method, the specific steps of the method comprising:

[0006] S1: Obtain the corresponding key ledger information from the power grid marketing service system through dispatching automation systems at all levels;

[0007] S2: Based on the key ledger information and data from other preset models, a station-line-transformer-household distribution network association model corresponding to each level of dispatching automation system is constructed;

[0008] S3: Aggregate the distributed resources within the jurisdiction of each level of dispatching automation system according to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model to obtain the corresponding aggregation control unit; wherein the distributed resources include the distributed resources participating in the ancillary service market and the distributed resources participating in the electric energy market;

[0009] S4: The aggregation control units are respectively connected to corresponding power grid control nodes to obtain a power grid panoramic model including distributed resources for use in power spot market system clearing calculations.

[0010] As a preferred solution, in step S1, the key ledger information includes the user number, electricity consumption category, metering point number and the distribution transformer GISID.

[0011] As a preferred solution, in step S2, based on the key ledger information and data of other preset models, the method for constructing the station-line-transformer-household main distribution network association model corresponding to the dispatching automation system at all levels is specifically as follows:

[0012] According to the user number, electricity consumption category, metering point number and the GISID of the distribution transformer, a transformer-user relationship is formed; wherein the metering point number is used as the smallest unit participating in the distributed resource aggregation;

[0013] The line-transformer relationship is obtained by calculating the dynamic topology based on the GIS model, distribution network model data and real-time data. Based on the transformer-user relationship of the power grid marketing service system, the line-transformer-user relationship is obtained by splicing.

[0014] By splicing the main and distribution network models, the station-line relationship is obtained, and after splicing with the line-transformer-household relationship, the station-line-transformer-household main distribution network association model is obtained.

[0015] As a preferred solution, in step S2, the transformer-user relationship is the relationship between the distribution transformer and the user, and the metering point; the line-transformer relationship is the relationship between the feeder and the distribution transformer; the line-transformer-user relationship is the relationship between the feeder and the distribution transformer and the user, and the metering point; the station-line relationship is the relationship between the substation and the feeder; the station-line-transformer-user relationship is the relationship between the substation and the feeder and the distribution transformer and the user, and the metering point.

[0016] As a preferred solution, in step S3, the distributed resources within the dispatching automation system at each level are aggregated according to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, and the method for obtaining the corresponding aggregation control unit specifically includes:

[0017] According to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, the distributed resources participating in the auxiliary service market within the jurisdiction of the dispatching automation system at all levels are aggregated according to the aggregation rules of the same aggregator, the same target auxiliary service market type, and the same control area to obtain the corresponding aggregation control unit;

[0018] The dispatching automation system obtains the association between the grid control nodes and the metering points from the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, and aggregates the distributed resources participating in the electric energy market within the jurisdiction of the dispatching automation systems at all levels according to the aggregation rules of the same grid control node, the same aggregator, and the same target market type to obtain the corresponding aggregation control unit.

[0019] As a preferred solution, the power calculation formula for market energy interaction participating in the ancillary service market is:

[0020]

[0021] in, P m,t The power of market energy interactions for participation in the ancillary services market; m For Aggregation control unit at the grid node; t For time; is the grid node where the distributed resources are located; L is the set of all grid nodes; For distributed resources; for The collection of all distributed resources on the grid node; P l,i,t For t Distributed resources at all times At the grid node of power.

[0022] As a preferred solution, the power calculation formula for market energy interaction participating in the electric energy market is:

[0023]

[0024] P l,m,t The power of market energy interaction participating in the electricity market, m For Aggregation control unit at the grid node; t For time; is the grid node where the distributed resources are located; For distributed resources; for The collection of all distributed resources on the grid node;P l,i,t For t Distributed resources at all times At the grid node of power.

[0025] As a preferred solution, before step S4, it also includes uniformly encoding the aggregation control unit according to a preset encoding rule to obtain an aggregation control unit identifier;

[0026] The preset coding rules include:

[0027] The coding hierarchy consists of the aggregator code, object category, highest voltage level, and aggregation control unit sequence code;

[0028] The aggregation control unit adopts the natural name named after the dispatching organization to which it belongs and the corresponding power grid control node equipment;

[0029] The coding structure of the aggregation control unit is a 20-bit mixed code, which includes letters and numbers.

[0030] A second aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the aforementioned distributed resource aggregation modeling method.

[0031] The third aspect of the present invention provides a computer device, including a storage medium, a processor, and a computer program stored in the storage medium and executable by the processor, wherein the computer program implements the steps of the aforementioned distributed resource aggregation modeling method when executed by the processor.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] There are many types of distributed resources, scattered grid connection points and non-unique model definitions of various aggregators. The present invention obtains an aggregation control unit by constructing a station-line-transformer-household distribution network association model, and hangs the aggregation control unit on the corresponding grid control node to obtain a grid panoramic model including distributed resources. The grid panoramic model can better adapt to the grid regulation and power market requirements under the new power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of a distributed resource aggregation modeling method provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The accompanying drawings are only used for illustrative purposes and are not to be construed as limiting the present invention;

[0036] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0037] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, in the description of this application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0040] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0041] Example 1

[0042] Please refer to Figure 1 This embodiment provides a distributed resource aggregation modeling method, and the specific steps of the method include:

[0043] S1: Obtain the corresponding key ledger information from the power grid marketing service system through dispatching automation systems at all levels;

[0044] It should be noted that the power grid marketing service system covers applications for end customers such as customer service, meter reading, accounting, charging, energy efficiency services, etc., such as supporting marketing personnel, on-site operations and business hall business development, and providing electricity users with online and offline services such as electricity application, payment, and repair reporting. It is one of the core business systems of the power grid.

[0045] In a specific embodiment, in step S1, the key ledger information includes user number, electricity consumption category, metering point number and distribution transformer GISID.

[0046] S2: Based on the key ledger information and data from other preset models, a station-line-transformer-household distribution network association model corresponding to each level of dispatching automation system is constructed;

[0047] In a specific embodiment, in step S2, according to the key ledger information and data of other preset models, the method for constructing the station-line-transformer-household main distribution network association model corresponding to the dispatching automation system at all levels is specifically as follows:

[0048] According to the user number, electricity consumption category, metering point number and the GISID of the distribution transformer, a transformer-user relationship is formed; wherein the metering point number is used as the smallest unit participating in the distributed resource aggregation;

[0049] The line-transformer relationship is obtained by calculating the dynamic topology based on the GIS model, distribution network model data and real-time data. Based on the transformer-user relationship of the power grid marketing service system, the line-transformer-user relationship is obtained by splicing.

[0050] By splicing the main and distribution network models, the station-line relationship is obtained, and after splicing with the line-transformer-household relationship, the station-line-transformer-household main distribution network association model is obtained.

[0051] In a specific embodiment, in step S2, the transformer-user relationship is the relationship between the distribution transformer and the user and the metering point; the line-transformer relationship is the relationship between the feeder and the distribution transformer; the line-transformer-user relationship is the relationship between the feeder and the distribution transformer and the user and the metering point; the station-line relationship is the relationship between the substation and the feeder; the station-line-transformer-user relationship is the relationship between the substation and the feeder and the distribution transformer and the user and the metering point.

[0052] Specifically, the distributed resources are aggregated to the grid control node of the 110kV substation of the power grid to form the station-line-transformer-user relationship table, and the station-line-transformer-user relationship table is specifically:

[0053] Table 1 Station-line-transformer-user relationship

[0054]

[0055] S3: Aggregate the distributed resources within the jurisdiction of each level of dispatching automation system according to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model to obtain the corresponding aggregation control unit; wherein the distributed resources include the distributed resources participating in the ancillary service market and the distributed resources participating in the electric energy market;

[0056] In a specific embodiment, in step S3, the distributed resources within the dispatching automation system at each level are aggregated according to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, and the method for obtaining the corresponding aggregation control unit specifically includes:

[0057] According to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, the distributed resources participating in the auxiliary service market within the jurisdiction of the dispatching automation system at all levels are aggregated according to the aggregation rules of the same aggregator, the same target auxiliary service market type, and the same control area to obtain the corresponding aggregation control unit;

[0058] It should be noted that since the clearing calculations of ancillary service markets such as frequency regulation, peak regulation, and standby rarely take grid section control into consideration, for distributed resources participating in the ancillary service market, it should be supported to aggregate them into an aggregated control unit according to the same aggregator, the same target ancillary service market type, and the same control area, without the need to divide them according to grid nodes.

[0059] The dispatching automation system obtains the association between the grid control nodes and the metering points from the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, and aggregates the distributed resources participating in the electric energy market within the jurisdiction of the dispatching automation systems at all levels according to the aggregation rules of the same grid control node, the same aggregator, and the same target market type to obtain the corresponding aggregation control unit.

[0060] It should be noted that the power calculation formula for market energy interaction in the ancillary service market is:

[0061]

[0062] in, P m,t The power of market energy interactions for participation in the ancillary services market; m For Aggregation control unit at the grid node; t For time; is the grid node where the distributed resources are located; L is the set of all grid nodes; For distributed resources; for The collection of all distributed resources on the grid node;P l,i,t For t Distributed resources at all times At the grid node of power.

[0063] It should be noted that the power calculation formula for market energy interaction participating in the electric energy market is:

[0064]

[0065] P l,m,t The power of market energy interaction participating in the electricity market, m For Aggregation control unit at the grid node; t For time; is the grid node where the distributed resources are located; For distributed resources; for The collection of all distributed resources on the grid node; P l,i,t For t Distributed resources at all times At the grid node of power.

[0066] S4: The aggregation control units are respectively connected to corresponding power grid control nodes to obtain a power grid panoramic model including distributed resources for use in power spot market system clearing calculations.

[0067] In a specific embodiment, before step S4, the method further includes uniformly encoding the aggregation control unit according to a preset encoding rule to obtain an aggregation control unit identifier;

[0068] The preset coding rules include:

[0069] The coding hierarchy consists of the aggregator code, object category, highest voltage level, and aggregation control unit sequence code;

[0070] The aggregation control unit adopts the natural name named after the dispatching organization to which it belongs and the corresponding power grid control node equipment;

[0071] The coding structure of the aggregation control unit is a 20-bit mixed code, which includes letters and numbers; a specific example is shown in Table 2:

[0072] Table 2 Coding example

[0073]

[0074] Specifically, after each dispatching automation system aggregates the distributed resources within its jurisdiction to form an aggregation control unit, it should send the aggregation results to the electricity spot market system to apply for the aggregation control unit identification; the electricity spot market system uniformly encodes the aggregation control units and sends them to dispatching automation systems at all levels. The dispatching automation system updates the model according to the aggregation control unit identification issued by the electricity spot market system.

[0075] Specifically, the aggregation control unit should be mounted on the power grid control node, with the "regulating conductive equipment class" in "Energy Management System Application Programming Interface (EMS-API) Part 301" as the base class, and the extended definition is "aggregation control unit class".

[0076] More specifically, the electricity spot market system should support the aggregation of the whole-network aggregate control unit model and measurement data, defined in the CIM model according to the "aggregate control unit class", and form a panoramic model of the power grid including distributed resources by attaching the whole-network aggregate control unit model to the power grid control node of the original power grid CIM model.

[0077] Example 2

[0078] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of a distributed resource aggregation modeling method described in Embodiment 1 are implemented.

[0079] Example 3

[0080] This embodiment provides a computer device, including a storage medium, a processor, and a computer program stored in the storage medium and executable by the processor. When the computer program is executed by the processor, the steps of a distributed resource aggregation modeling method described in Example 1 are implemented.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A distributed resource aggregation modeling method, characterized in that: The specific steps of the method include: S1: Obtain the corresponding key ledger information from the power grid marketing service system through dispatching automation systems at all levels; S2: Based on the key ledger information and data from other preset models, a station-line-transformer-household distribution network association model corresponding to each level of dispatching automation system is constructed; S3: Aggregate the distributed resources within the jurisdiction of each level of dispatching automation system according to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model to obtain the corresponding aggregation control unit; wherein the distributed resources include the distributed resources participating in the ancillary service market and the distributed resources participating in the electric energy market; S4: The aggregation control units are respectively connected to corresponding power grid control nodes to obtain a power grid panoramic model including distributed resources for use in power spot market system clearing calculations; In step S1, the key account information includes user number, electricity consumption category, metering point number and distribution transformer GISID; In step S2, according to the key account information and data of other preset models, the method for constructing the station-line-transformer-household main distribution network association model corresponding to the dispatching automation system at all levels is specifically as follows: According to the user number, electricity consumption category, metering point number and the GISID of the distribution transformer, a transformer-user relationship is formed; wherein the metering point number is used as the smallest unit participating in the distributed resource aggregation; The line-transformer relationship is obtained by calculating the dynamic topology based on the GIS model, distribution network model data and real-time data. Based on the transformer-user relationship of the power grid marketing service system, the line-transformer-user relationship is obtained by splicing. By splicing the main and distribution network models, the station-line relationship is obtained, and after splicing with the line-transformer-household relationship, a station-line-transformer-household main distribution network association model is obtained; According to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, the distributed resources within the dispatching automation system at each level are aggregated respectively to obtain the corresponding aggregation control unit, which specifically includes: According to the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, the distributed resources participating in the auxiliary service market within the jurisdiction of the dispatching automation system at all levels are aggregated according to the aggregation rules of the same aggregator, the same target auxiliary service market type, and the same control area to obtain the corresponding aggregation control unit; The dispatching automation system obtains the association between the grid control nodes and the metering points from the station-line-transformer-household relationship table corresponding to the station-line-transformer-household main distribution network association model, and aggregates the distributed resources participating in the electric energy market within the jurisdiction of the dispatching automation systems at all levels according to the aggregation rules of the same grid control node, the same aggregator, and the same target market type to obtain the corresponding aggregation control unit.

2. A distributed resource aggregation modeling method according to claim 1, characterized in that: In step S2, the transformer-user relationship is the relationship between the distribution transformer and the user and the metering point; the line-transformer relationship is the relationship between the feeder and the distribution transformer; the line-transformer-user relationship is the relationship between the feeder and the distribution transformer and the user and the metering point; the station-line relationship is the relationship between the substation and the feeder; the station-line-transformer-user relationship is the relationship between the substation and the feeder and the distribution transformer and the user and the metering point.

3. A distributed resource aggregation modeling method according to claim 1, characterized in that: The power calculation formula for market energy interaction participating in the ancillary service market is: Among them, P m,t is the power of market energy interaction participating in the ancillary service market; m is the aggregation control unit on the l grid node; t is the time; l is the grid node where the distributed resource is located; L is the set of all grid nodes; i is the distributed resource; I l is the set of all distributed resources on the grid node; P l,i,t is the power of distributed resource i at grid node l at time t.

4. A distributed resource aggregation modeling method according to claim 1, characterized in that: The power calculation formula for market energy interaction participating in the electric energy market is: P l,m,t is the power of market energy interaction participating in the electricity market, m is the aggregation control unit at the l grid node; t is the time; l is the grid node where the distributed resource is located; i is the distributed resource; I l is the set of all distributed resources on the grid node; P l,i,t is the power of distributed resource i at grid node l at time t.

5. A distributed resource aggregation modeling method according to claim 1, characterized in that: Before step S4, the method further includes uniformly encoding the aggregation control unit according to a preset encoding rule to obtain an aggregation control unit identifier; The preset coding rules include: The coding hierarchy consists of the aggregator code, object category, highest voltage level, and aggregation control unit sequence code; The aggregation control unit adopts the natural name named after the dispatching organization to which it belongs and the corresponding power grid control node equipment; The coding structure of the aggregation control unit is a 20-bit mixed code, which includes letters and numbers.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a distributed resource aggregation modeling method as described in any one of claims 1 to 5 are implemented.

7. A computer device, characterized in that: The method comprises a storage medium, a processor and a computer program stored in the storage medium and executable by the processor, wherein the computer program, when executed by the processor, implements the steps of a distributed resource aggregation modeling method as described in any one of claims 1 to 5.

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