CN116108596A - Method for rapidly evaluating reliability of power distribution network in power system - Google Patents
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Abstract
The invention relates to the technical field of reliability evaluation, in particular to a method for rapidly evaluating the reliability of a power distribution network in a power system, which comprises the following steps: and matching a power distribution network database in the power system with an external system database to realize interconnection and interworking between the power system and different application occasions. By means of a digital twin technology, vertical shaft limitation between an electric power system and application systems in different scenes is solved, a cross-specialty cross-system power distribution network characterization index system is established, and therefore differential reliability assessment calculation is conducted according to different application scenes. According to the invention, through integrating the power system and the actual application system database, the problems that the existing power system evaluation system and the application system are large in software difference, uneven in application level and unfavorable for unified extraction and application of data are solved, the data pulling efficiency is improved, and the problems that data sharing among information systems is difficult, interfaces are difficult to unify, and the integration of the Internet of things and informatization is poor are solved.
Description
Technical Field
The invention relates to the technical field of reliability evaluation, in particular to a method for rapidly evaluating the reliability of a power distribution network in a power system.
Background
The reliability of the power distribution system is that the power supply reliability of the running power distribution network or the newly designed power distribution network under the condition of the used line equipment is evaluated so as to judge the power supply reliability of the power distribution network. Through the evaluation of the reliability of the distribution network, the influence of prearranged power failure, complete stop of a transformer substation and fault power failure on the power supply reliability can be determined, and the technical measures for improving the power supply reliability and the management method for improving the power supply reliability are determined.
The invention discloses a power distribution network reliability evaluation method, which combines a power distribution network reliability evaluation theory with an actual power grid, converts the evaluation of the power distribution network reliability into analysis of power failure factors of the power distribution network, establishes a power distribution network reliability evaluation system, an evaluation model, an evaluation standard and an evaluation index weight, and quantitatively reflects the current reliability level of the power distribution network from multiple angles.
The invention discloses a power distribution network power supply reliability evaluation method, equipment and medium based on digital twinning, wherein the method acquires basic data of a distribution line and head-end operation data of the distribution line; and constructing a digital twin power grid based on a digital twin technology, the basic data and the operation data, and obtaining the reliability index score of the power distribution network of the power distribution line.
However, the above technical solution has the following drawbacks: the invention discloses a reliability evaluation method for a power supply shop system of a power distribution network by adopting different technical means, wherein the method is based on basic data of a single power distribution line, and in actual power system use, the power distribution network is usually matched with system software of power distribution equipment in a specific field by depending on a physical application system, and the bottom software of different power distribution equipment has larger difference and uneven application level, so that unified extraction and application of the power distribution network data of the power distribution network are not facilitated. Meanwhile, the data sharing among the information systems of the database is difficult, the interfaces are difficult to unify, the integration of the Internet of things and informatization still has defects, and the waste of data management resources is easy to cause.
Disclosure of Invention
Aiming at the technical problems in the background technology, the invention provides a method for rapidly evaluating the reliability of a power distribution network in a power system.
The technical scheme of the invention is as follows: a method for rapidly evaluating reliability of a power distribution network in a power system comprises the following steps:
s1, matching a power distribution network database in the power system with an external system database to realize interconnection and intercommunication between the power system and different application occasions.
S2, solving the vertical shaft limitation between the power system and the application system under different scenes by means of a digital twin technology, and establishing a cross-specialty cross-system power distribution network characterization index system, so that the differential reliability evaluation calculation is carried out according to different application scenes.
And S3, endowing the four-dimensional presentation effect of the representation index system diagram, the number, the sound and the shadow of the power distribution network through an information visualization technology.
And S4, establishing a reliability quantization model of the power system distribution network under the condition of combining the four-dimensional information with the specific scene application system.
And S5, formulating a power distribution network reliability evaluation weight index in combination with a specific application system, and carrying out simulation calculation by depending on a power distribution network reliability evaluation formula.
And S6, fusing and comparing the quantitative model with the calculation result and the multi-element sensor data in the application system of the physical entity to obtain a specific power distribution network reliability evaluation result in the digital twin power system.
And S7, outputting a power distribution network reliability evaluation result in the physical entity.
Preferably, in S1, the internal power system, the external application system and the upstream and downstream resources are penetrated, so that the corresponding data sharing capability of different professions is improved, the data value of the power grid is mined, and the interconnection and intercommunication and collaborative development of the power system and different professions are realized.
Preferably, in S2, the vertical shaft limitation of the power system and a specific application system is broken through by means of a digital twin technology, and a characterization index system of a cross-specialty cross-system is established; and the power grid business is communicated through the business dimension, the management dimension and the operation dimension.
Preferably, in S3, three-dimensional spatial information expression capability is provided by technologies such as three-dimensional modeling, visual simulation, information integration, visual interaction and the like, so as to construct a digital twin body of a power grid.
Preferably, in S4, 360 ° panoramic coverage of different levels of earth, country, province, city, region, station, and key load of the power grid is realized; and establishing a reliability quantization model by utilizing massive power grid operation data and equipment monitoring data.
Preferably, in S5, the simulation calculation is performed according to the existing reliability evaluation formula, and a data service platform is established, where the platform has an interface configuration capability, and is capable of integrating various internet of things data, information data, space data and power system data.
Preferably, in S6, based on the digital twin system, the electric power system performs layered penetration from cities, areas, stations and equipment to terminals to drill down step by step, so as to meet the application requirements under the condition of no use of scenes, and construct manageable, visible, traceable and observable reliability evaluation data results.
Preferably, in S7, the method is applied to an urban panoramic digital twin body to cooperatively cover power grid data, object operation, electricity protection lines, weather traffic racing, security power, security work and command cooperation and other panoramic electricity protection information, so as to obtain a hierarchical reliability evaluation system model in different systems.
Preferably, the reliability indexes of the distribution network comprise a power supply radius, overhead line connection, overhead line segmentation, fuse wire support capacity, a hybrid line, a cable ring network node, a combined rod line, a switch station self-cutting configuration, an outgoing line splicing bin, a weak net rack, a line section and a load rate; and after the corresponding reliability index of the power distribution network is matched with the unnecessary application system, correspondingly obtaining a reliability index database of the matched application system.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial technical effects: by integrating the power system and the actual application system database, the problems that the existing power system evaluation system and the application system are large in software difference, uneven in application level and unfavorable for unified extraction and application of data are solved, the data pulling efficiency is improved, and the problems that data sharing among information systems is difficult, interfaces are difficult to unify, and fusion of the Internet of things and informatization is poor are solved. The three-dimensional four-dimensional visual analysis method is utilized to carry out simulation calculation on the formula data of the reliability evaluation system, so that the limitation of the reliability two-dimensional space analysis is changed. The digital twin technology is utilized to carry out simulation operation, the problems of more traditional reliability real-time evaluation fault forms, more power grid business coverage links, wide influence range and easy influence of environmental factors on reliability evaluation precision are changed, and the method provided by the invention has higher requirements on safe and stable operation of the power grid. A one-to-one specific database of the shop system is built according to a specific application system, so that the defects that a large amount of data are in a 'deep sleep state' and do not play a role due to small data calling amount in the existing assessment method are overcome, and the accuracy and pertinence of reliability assessment are improved.
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FIG. 1 is a schematic diagram of a system module according to an embodiment of the invention.
Detailed Description
Example 1
As shown in fig. 1, the method for quickly evaluating the reliability of a power distribution network in a power system according to the embodiment includes the following steps:
s1, matching a power distribution network database in the power system with an external system database to realize interconnection and intercommunication between the power system and different application occasions.
S2, solving the vertical shaft limitation between the power system and the application system under different scenes by means of a digital twin technology, and establishing a cross-specialty cross-system power distribution network characterization index system, so that the differential reliability evaluation calculation is carried out according to different application scenes. By means of digital twin technology, the vertical shaft limitation of the power system and a specific application system is broken, and a characterization index system crossing the professional cross-system is established; the power grid business is communicated through a business dimension, a management dimension and an operation dimension; and the data distributed in different systems are summarized, integrated and presented by adopting a unified standard, and simultaneously, the data are combined with the power grid operation and detection and dispatching service to optimize the intelligent power grid.
And S3, endowing the four-dimensional presentation effect of the representation index system diagram, the number, the sound and the shadow of the power distribution network through an information visualization technology. Through technologies such as three-dimensional modeling, visual simulation, information integration, visual interaction and the like, three-dimensional space information expression capability is provided, and a digital twin body of a power grid is constructed. The method has the advantages that mass data in the power grid can be expressed more efficiently and intuitively, the power grid system is visualized and facilitated, and service management and decision making are assisted for power grid personnel.
And S4, establishing a reliability quantization model of the power system distribution network under the condition of combining the four-dimensional information with the specific scene application system. S4, realizing 360-degree panoramic coverage of different levels of earth, country, province, city, region, station and key load of the power grid; and establishing a reliability quantization model by utilizing massive power grid operation data and equipment monitoring data. Visual tracing of personnel and vehicles positioning, action tracks, routing inspection routes and the like and historical tracing of business information are realized, and a visual, searchable, manageable and traceable three-dimensional power grid operation management platform is constructed.
And S5, formulating a power distribution network reliability evaluation weight index in combination with a specific application system, and carrying out simulation calculation by depending on a power distribution network reliability evaluation formula. According to the existing reliability evaluation formula, simulation calculation is carried out, a data service platform is established, the platform has interface configuration capability, integrated processing capability of various internet of things data, information data, space data and power system data is achieved, and various interface protocols can be integrated. And packaging and integrated calling of the API level are carried out on related system functions, the capability node is formed to serve, and data service is carried out from the perspective of power business, so that cross-professional data fusion is satisfied.
And S6, fusing and comparing the quantitative model with the calculation result and the multi-element sensor data in the application system of the physical entity to obtain a specific power distribution network reliability evaluation result in the digital twin power system. Based on the digital twin system, the electric power system performs layered penetration from cities, areas, stations and equipment to terminals to drill down step by step, meets application requirements under no scene, and builds manageable, visible, traceable and sighted reliability evaluation data results.
And S7, outputting a power distribution network reliability evaluation result in the physical entity. The method is applied to an urban panoramic digital twin body, and the panoramic electricity-protecting information such as power grid data, object operation, electricity-protecting lines, weather traffic racing, guaranteeing power, guaranteeing work and command cooperation and the like is cooperatively covered, so that the hierarchical reliability evaluation system model in different systems is obtained.
In this embodiment, by integrating the power system and the database of the actual application system, the problems that the existing power system evaluation system and the application system have large software difference and uneven application level, are unfavorable for unified extraction and application of data, improve the data pulling efficiency, and change the problems that the data sharing between information systems is difficult, the interface is difficult to unify, and the integration of the internet of things and informatization is poor are changed. The three-dimensional four-dimensional visual analysis method is utilized to carry out simulation calculation on the formula data of the reliability evaluation system, so that the limitation of the reliability two-dimensional space analysis is changed. The digital twin technology is utilized to carry out simulation operation, the problems of more traditional reliability real-time evaluation fault forms, more power grid business coverage links, wide influence range and easy influence of environmental factors on reliability evaluation precision are changed, and the method provided by the invention has higher requirements on safe and stable operation of the power grid. According to the specific application system, a one-to-one specific database of the in-store system is established, so that the defects that the existing assessment method is small in data amount, and a large amount of data is in a 'deep sleep state' and does not play a role are overcome, the accuracy of reliability assessment is improved, and in the first specific embodiment, S1, the internal power system, the external application system and the upstream and downstream resources are penetrated, the corresponding sharing capacity of different professional data is improved, the data value of a power grid is mined, and the interconnection, intercommunication and collaborative development of the power system and different professions are realized; the centralized integrated management of each system provides full-view management and comprehensive scheduling capability for managers, and helps to realize sharing and sharing of power data and data decision.
Further, the reliability indexes of the distribution network comprise power supply radius, overhead line connection, overhead line segmentation, fuse wire support capacity, mixed lines, cable ring network nodes, combined rod lines, switch station self-cutting configuration, outgoing line splicing bins, weak net racks, line sections and load rates; and after the corresponding reliability index of the power distribution network is matched with the unnecessary application system, correspondingly obtaining a reliability index database of the matched application system.
Example two
As shown in fig. 1, the method for quickly evaluating the reliability of a power distribution network in a power system according to the embodiment includes the following steps:
s1, matching a power distribution network database in the power system with an electric vehicle charging database to realize interconnection and intercommunication between the power system and different application occasions. And the combination of time-varying load modeling and element life reliability quantitative calculation of the power distribution network is realized.
S2, a digital twin technology is used for solving the vertical shaft limitation between application systems of the electric power system under the charging of the electric automobile, and a cross-specialty cross-system power distribution network characterization index system is established, so that the differential reliability evaluation calculation is carried out according to different application scenes. By means of digital twin technology, the vertical shaft limitation of the power system and a specific application system is broken, and a characterization index system crossing the professional cross-system is established; the power grid business is communicated through a business dimension, a management dimension and an operation dimension; and the data distributed in different systems are summarized, integrated and presented by adopting a unified standard, and simultaneously, the data are combined with the power grid operation and detection and dispatching service to optimize the intelligent power grid.
And S3, endowing the four-dimensional presentation effect of the representation index system diagram, the number, the sound and the shadow of the power distribution network through an information visualization technology. Through technologies such as three-dimensional modeling, visual simulation, information integration, visual interaction and the like, three-dimensional space information expression capability is provided, and a digital twin body of a power grid is constructed. The method has the advantages that mass data in the power grid can be expressed more efficiently and intuitively, the power grid system is visualized and facilitated, and service management and decision making are assisted for power grid personnel.
And S4, establishing a reliability quantization model of the power system distribution network under the condition of combining the four-dimensional information with the specific scene application system. S4, realizing 360-degree panoramic coverage of different levels of earth, country, province, city, region, station and key load of the power grid; and establishing a reliability quantization model by utilizing massive power grid operation data and equipment monitoring data. Visual tracing of personnel and vehicles positioning, action tracks, routing inspection routes and the like and historical tracing of business information are realized, and a visual, searchable, manageable and traceable three-dimensional power grid operation management platform is constructed.
And S5, formulating a reliability evaluation weight index of the power distribution network by combining an electric automobile charging system, and carrying out simulation calculation by depending on a reliability evaluation formula of the power distribution network. According to the existing reliability evaluation formula, simulation calculation is carried out, a data service platform is established, the platform has interface configuration capability, integrated processing capability of various internet of things data, information data, space data and power system data is achieved, and various interface protocols can be integrated. And packaging and integrated calling of the API level are carried out on related system functions, the capability node is formed to serve, and data service is carried out from the perspective of power business, so that cross-professional data fusion is satisfied.
And S6, fusing and comparing the quantitative model with the calculation result and the multi-element sensor data in the application system of the physical entity to obtain a specific power distribution network reliability evaluation result in the digital twin power system. Based on the digital twin system, the electric power system performs layered penetration from cities, areas, stations and equipment to terminals to drill down step by step, meets application requirements under no scene, and builds manageable, visible, traceable and sighted reliability evaluation data results.
And S7, outputting a power distribution network reliability evaluation result in the physical entity. The method is applied to an urban panoramic digital twin body, and the panoramic electricity-protecting information such as power grid data, object operation, electricity-protecting lines, weather traffic racing, guaranteeing power, guaranteeing work and command cooperation and the like is cooperatively covered, so that the hierarchical reliability evaluation system model in different systems is obtained.
In the embodiment, the integration of the power system and the database of the practical application system changes the problems that the existing power system evaluation system and the existing electric vehicle charging system are large in software difference, uneven in application level and unfavorable for unified extraction and application of data, improves the data pulling efficiency, and changes the problems that data sharing among information systems is difficult, interfaces are difficult to unify, and integration of the Internet of things and informatization is poor. The three-dimensional four-dimensional visual analysis method is utilized to carry out simulation calculation on the formula data of the reliability evaluation system, so that the limitation of the reliability two-dimensional space analysis is changed. The digital twin technology is utilized to carry out simulation operation, the problems of more traditional reliability real-time evaluation fault forms, more power grid business coverage links, wide influence range and easy influence of environmental factors on reliability evaluation precision are changed, and the method provided by the invention has higher requirements on safe and stable operation of the power grid. According to the specific application system, a one-to-one specific database of the in-store system is established, so that the defects that the existing assessment method is small in data amount, and a large amount of data is in a 'deep sleep state' and does not play a role are overcome, the accuracy of reliability assessment is improved, and in the first specific embodiment, S1, the internal power system, the external application system and the upstream and downstream resources are penetrated, the corresponding sharing capacity of different professional data is improved, the data value of a power grid is mined, and the interconnection, intercommunication and collaborative development of the power system and different professions are realized; the centralized integrated management of each system provides full-view management and comprehensive scheduling capability for managers, and helps to realize sharing and sharing of power data and data decision.
Further, the reliability indexes of the distribution network comprise power supply radius, overhead line connection, overhead line segmentation, fuse wire support capacity, mixed lines, cable ring network nodes, combined rod lines, switch station self-cutting configuration, outgoing line splicing bins, weak net racks, line sections and load rates; and after the corresponding reliability index of the power distribution network is matched with the unnecessary application system, correspondingly obtaining a reliability index database of the matched application system.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (9)
1. A method for rapidly evaluating the reliability of a power distribution network in a power system is characterized by comprising the following steps:
s1, matching a power distribution network database in a power system with an external system database to realize interconnection and intercommunication between the power system and different application occasions;
s2, solving the vertical shaft limitation between the power system and the application system under different scenes by means of a digital twin technology, and establishing a cross-specialty cross-system power distribution network characterization index system so as to evaluate and calculate the difference reliability according to different application scenes;
s3, endowing the four-dimensional presentation effect of the representation index system diagram, the number, the sound and the shadow of the power distribution network through an information visualization technology;
s4, establishing a reliability quantization model of the power distribution network of the power system under the condition of combining the four-dimensional information with the application system of the specific scene;
s5, formulating a power distribution network reliability evaluation weight index in combination with a specific application system, and carrying out simulation calculation by depending on a power distribution network reliability evaluation formula;
s6, fusing and comparing the quantization model with the calculation result and the multi-element sensor data in the application system of the physical entity to obtain a specific power distribution network reliability evaluation result in the digital twin power system;
and S7, outputting a power distribution network reliability evaluation result in the physical entity.
2. The rapid assessment method for reliability of a power distribution network in a power system according to claim 1, wherein in S1, the internal power system, the external application system and the upstream and downstream resources are penetrated, the corresponding different professional data sharing capacity is improved, the data value of the power grid is mined, and the interconnection and intercommunication and collaborative development of the power system and different professions are realized.
3. The method for rapidly evaluating the reliability of a power distribution network in a power system according to claim 1, wherein in the step S2, a vertical shaft limit of the power system and a specific application system is broken through by means of a digital twin technology, and a characterization index system of cross-major cross-system is established; and the power grid business is communicated through the business dimension, the management dimension and the operation dimension.
4. The rapid assessment method for reliability of a power distribution network in a power system according to claim 1, wherein in S3, three-dimensional space information expression capability is provided by three-dimensional modeling, visual simulation, information integration, visual interaction and other technologies, and a digital twin body of the power grid is constructed.
5. The method for rapidly evaluating the reliability of a power distribution network in a power system according to claim 1, wherein in S4, 360-degree panoramic coverage of different levels of earth, country, province, city, region, station and key load of the power grid is realized; and establishing a reliability quantization model by utilizing massive power grid operation data and equipment monitoring data.
6. The method for rapidly evaluating the reliability of a power distribution network in a power system according to claim 1, wherein in S5, simulation calculation is performed according to an existing reliability evaluation formula, a data service platform is established, and the platform has interface configuration capability and integrated processing capability for interfacing various internet of things data, information data, space data and power system data.
7. The rapid evaluation method for reliability of a power distribution network in a power system according to claim 1, wherein in S6, based on a digital twin system, the power system performs hierarchical penetration and progressive drill-down from cities, areas, stations and equipment to terminals, meets application requirements in no-use situations, and constructs manageable, visible, traceable and observable reliability evaluation data results.
8. The rapid assessment method for reliability of a power distribution network in a power system according to claim 1, wherein in S7, the method is applied to an urban panoramic digital twin body to cooperatively cover panoramic electricity-saving information such as power grid data, object operation, electricity-saving lines, weather traffic racing, power guarantee, work guarantee and command agreement and the like, so as to obtain a hierarchical reliability assessment system model in different systems.
9. The method for quickly evaluating the reliability of a power distribution network in a power system according to any one of claims 1 to 8, wherein the power distribution network reliability index comprises a power supply radius, overhead line connection, overhead line segmentation, fuse branching capacity, hybrid lines, cable loop network nodes, closed-pole lines, switch station self-cutting configuration, outgoing line splice bins, weak net racks, line sections and load ratios; and after the corresponding reliability index of the power distribution network is matched with the unnecessary application system, correspondingly obtaining a reliability index database of the matched application system.
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