CN106776750B - Graph-mode integrated digital preplan system for power distribution network - Google Patents
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Abstract
The invention discloses a graph-model integrated digital preplan system for a power distribution network, which comprises: the power distribution network digital plan information support platform is used for providing power distribution network digital plan related information for the digital plan automatic generation system; the system comprises a digital plan automatic generation system, a power distribution network digital plan automatic generation system and a power distribution network digital plan automatic generation system, wherein the digital plan automatic generation system is used for automatically generating electrified, power conservation and planned power failure plans based on relevant information of the power distribution network digital plan, and performing feasibility checking, storage, query and inversion processing on the generated plans to realize plan analysis of electrified, power conservation and planned power failure; the feasibility of the plan is checked, the plan is stored, inquired, inverted and the like, and the informatization level of the power distribution network is improved.
Description
Technical Field
The invention relates to the field of digital research of a power distribution network, in particular to a graph-mode integrated digital preplan system for the power distribution network.
Background
The distribution network, as an important component of the power system, is the only part that is directly connected to the final consumer. The scheduling management of the power distribution network directly affects the power supply reliability and the power supply service quality of users. With the development of distribution network automation, the level of distribution automation has been developed. The method has the advantages that the real-time operation management of the power distribution network scheduling is realized on the basis of realizing the power distribution network and monitoring control data acquisition (SCADA), the information such as graphic information, overhaul application, power protection application, scheduling plan and the like is integrated, and the whole-process tracking, information sharing and management automation of the daily scheduling work of the power distribution network are formed.
In order to embody the 'safety first and prevention first' policy of power production in the daily management work of a dispatcher, a dispatching department can make a large amount of plan analysis of power failure and power conservation. Different 'custom-made' schemes are provided according to different user requirements, and effective measures are provided according to the characteristics of the user such as nature, level and attribute in the power conservation scheme. This is called a pre-plan, i.e. an emergency treatment plan which is pre-established based on the prediction of the type and extent of impact of a potential or likely grid fault. The analysis of the plans mainly comprises the processing of the plans for important user power supply, power loss of a power supply point and accident processing of an important power transmission line.
At present, due to the characteristics of multiple devices of a distribution network, large information amount, flexible wiring, large mode change and the like, the planning of the plans needs to combine the operation condition of the distribution network and a large amount of drawings and report information, form corresponding accident plans by depending on the operation experience of the existing scheduling personnel, mode calculation results and the like, and provide various targeted safeguard measures according to the framework and the operation characteristics of a power grid. The plans are stored in a text plan or partial electronic plan mode, the digitalization degree is not high, the search and query are inconvenient, the updating is not easy to modify, and the resource sharing performance is poor.
In summary, in the process of implementing the technical solution of the present invention, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
in the prior art, the existing power distribution network plan formulation has the technical problems of low digitalization degree, inconvenient search and query, difficult modification and update and poor resource sharing.
Disclosure of Invention
The invention provides a graph-mode integrated digital preplan system for a power distribution network, which solves the technical problems of low digitalization degree, inconvenient search and query, difficult modification and update and poor resource sharing in the conventional preplan system, and realizes the technical effects of multiple functions, higher informatization degree, convenient search and convenient sharing of the preplan system.
In order to solve the technical problem, the present application provides a digital preplan system of distribution network of graph-mode integration, the system includes:
the power distribution network digital plan information support platform is used for providing power distribution network digital plan related information for the digital plan automatic generation system;
the system comprises a digital plan automatic generation system, wherein the digital plan automatic generation system is used for automatically generating electrified, power-conserving and planned power failure plans based on the relevant information of the digital plan of the power distribution network, and performing feasibility checking, saving, inquiring and inversion processing on the generated plans.
Preferably, the open format vector graphics SVG is used as a power distribution network equipment information graphic expression, the power distribution network equipment information graphic expression is subjected to associated modeling with CIM, VC is used as a development platform, OPENGL and the like are used as development components, and the editing and development of the power distribution network equipment information graphic based on CIM/SVG graphic model integration are realized. The digital plan information support platform adopts a multilayer system structure, and adapts to continuously increasing and changing business requirements by establishing a data warehouse system environment with good openness. The device layer is mainly divided into a device layer, a data layer, an application layer and a presentation layer.
1) Equipment layer: the method is the outward actual physical embodiment of a graph-model integrated power distribution network digital plan information support platform, mainly comprises the acquisition of power distribution network primary equipment, data acquisition information and data correlation information, and carries out information interaction with a data layer through a network channel.
2) And (3) a data layer: the method is a massive database of a graph-model integrated digital preplan information support platform of the power distribution network. Various off-line and on-line information is collected, the data source is a data source of a digital platform of a data analysis display center, and data support is provided through the formation of a pre-arranged plan by data integration. It carries out bidirectional data exchange with an upper application layer through a data bus.
3) An application layer: the application function of the graph-model integrated digital pre-arranged plan of the power distribution network is embodied, and the graph-model integrated digital pre-arranged plan is mainly divided into graph management, pre-arranged plan management and file management.
4) A presentation layer: the electronic plan is displayed based on the main wiring diagram of the power grid, the path and equipment parameter property representation of the plan is provided, centralized display can be performed from the whole and the local, and data exchange is performed between the application layer and the application layer through a data bus.
Preferably, graphics management. The main function of the system is to realize the drawing and management of a primary main wiring diagram of a distribution network, an electrical wiring diagram of a transformer substation, a ring main unit and other combined electrical equipment. The user can arbitrarily enlarge and reduce the graphics and realize the nesting of different graphics files so as to quickly acquire the required information. It is the basis of the whole system.
And (5) managing a plan. Due to the large number of radioactive networks in a distribution network, the repair or failure of some line or bus will cause a power outage to the subscribers to which it is connected. In order to facilitate analysis, the operation state of the equipment can be set at will, for example, the voltage loss or outage condition of a transformer substation and a power plant in a distribution network, the connection relation of the equipment is searched by adopting electrified analysis on a graphical interface, the operation state of the equipment is judged (the equipment is operated in green, the equipment is operated in red when the equipment is shut down, and the equipment is not electrified in gray), so that the equipment is dynamically colored, and a corresponding exit equipment list is given. The plan realization of the power supply scheme of the important user is an intelligent expression integrating the distribution network graph-model integration and the distribution network optimization algorithm.
And managing files. It mainly realizes the standardization of management and the sharing of resources. The inversion of the plan is to demonstrate the corresponding steps from the new steps of the generated plan; the feasibility analysis of the plan is mainly to perform physical check on the generation process of the plan and to judge whether the basic operation condition of the power grid can be met.
Preferably, the digital plan automatic generation system specifically includes:
the graphic management unit is used for searching a power grid wiring diagram, and performing equipment addition and deletion maintenance processing;
a protocol management unit to: setting equipment states, analyzing power loss of a power supply point, analyzing circuit faults and power loss, and managing power supply schemes of important users;
a file management unit to: and carrying out inversion of the plan, carrying out feasibility analysis of the plan, storing the plan and searching the plan.
Preferably, the plan system is designed according to an object-oriented mode, the distribution network equipment is divided into multiple types, when the attributes of a certain type of primitive are defined, partial attributes in a parent class are inherited, and then the attributes which are not contained in the parent class are defined; the predetermined plan system establishes the mutual association relationship between the electrical equipment through the equipment ID, and can draw various wiring diagrams of the power system with connection meanings based on the integration of the diagram and the model library.
Preferably, the plan system can perform topology search based on graph-model integration; the predetermined plan system can intensively analyze the connection states of the graphs respectively placed in different graph files through the association relationship, and establish the connection relationship through the association relationship; the topology analysis of the preplan system includes two parts: firstly, topology analysis is carried out on a primary main wiring diagram of a distribution network to establish the connection relation, and secondly, topology analysis is carried out on a transformer substation, a switch station and a ring main unit to establish the connection relation, so that a network topology analysis result with nested graphs is formed.
Preferably, the scheme system can optimize and select the power-saving scheme, and the optimal selection of the power-saving scheme is to search a path between a power-saving object and a power supply; the optimal path tree constructed by taking the electricity-preserving object as the root is a positive sequence tree, and the optimal path tree constructed by taking the power supply as the root is a negative sequence tree; when the positive sequence tree is expanded, the nodes adjacent to the nodes are the out-degree nodes of the positive sequence tree, and the adjacent nodes of the nodes in the reverse sequence tree are the in-degree nodes of the positive sequence tree; and respectively forming the selection of an optimization scheme by taking the shortest path, the minimum switching action and the minimum network loss as an optimization objective function.
Preferably, the planning system can analyze the power supply condition of the important user to form a power protection scheme, and the forming of the power protection scheme specifically includes:
the first step is as follows: setting the operation mode of a plan system; the second step is that: carrying out graphic designation of the fault equipment; the third step: carrying out graphic designation of the electricity-keeping load; the fourth step: carrying out graphic designation of power supply points; the fifth step: performing automatic search generation of a power supply path; and a sixth step: performing automatic check of the power supply path; the seventh step: performing inversion of the power supply path; eighth step: forming a pre-arranged password; the ninth step: and (5) storing the plan.
Preferably, the automatic search of the power supply path in the step 5 is selectively realized by taking the shortest path, the minimum switching action and the minimum network loss as an optimization objective function; 6, automatically checking the power supply path according to the capacity and the state of the equipment; the formed power protection scheme meets the following constraint conditions: (1) power flow constraint of the power distribution network; (2) node voltage, current constraints; (3) constraints on the state of the device.
The graph-model integrated distribution network plan system divides distribution network equipment into a generator class, a bus class, a breaker class, a line class, an external system class, a transformer class, a disconnecting link class and the like according to an object-oriented program design method. When defining the attributes of a certain type of primitive, the attributes in the parent class are inherited, and then the attributes not contained in the parent class are defined by the primitive definition. A complete distribution network equipment model comprises physical attributes, operational attributes and layer attributes. The physical properties are inherent in the equipment, such as nameplate parameters, materials and the like. The operation attribute refers to an attribute generated after the equipment is put into or taken out of the power grid. The layer attribute refers to a graphic file where the device is located and a corresponding established topological relation, and the layer attribute of the device can establish an association relation between devices on different graphic files. The system establishes the correlation between the electrical devices through the device ID. Based on the graph-model-library integration technology, the system can conveniently draw various wiring diagrams of the power system with connection meanings, such as a system main wiring diagram, a system tide diagram, an in-station tide diagram, a system structure diagram and the like.
And searching the topology based on graph-model integration. Distribution network topology analysis is the basis of the functions of pre-planned equipment electrification analysis, electricity-preserving schemes and the like. The topology analysis mainly has the functions of modeling network physical nodes into bus models for calculation and integrating buses with electrical connection into an electrical island according to the states of the switches and the states of the network elements. Due to the complexity of the urban distribution network, the wiring modes of substations, switchyards, switches inside a ring main unit and the like cannot be included in detail in a primary main wiring diagram, but the change of the states of the switches and the breakers can affect the change of the wiring mode of the whole network. In order to describe the distribution network information in detail, the system can analyze the graphic connection states respectively placed in different graphic files in a centralized manner through the association relationship, and establish the connection relationship through the association relationship, wherein the connection relationship comprises a primary wiring diagram of the distribution network and a specific connection relationship diagram of the equipment. The topology analysis of the system comprises two parts: firstly, topology analysis is carried out on a primary main wiring diagram of a distribution network to establish the connection relation, and secondly, topology analysis is carried out on a transformer substation, a switch station, a ring main unit and the like to establish the connection relation. Finally, a network topology analysis result of graph nesting, namely the topology analysis of the whole network model, can be formed.
And (4) optimizing and selecting a power conservation scheme. The optimized selection of the power protection scheme is to search the path between the power protection object and the power supply, so as to meet the selection requirements of users on different paths to the greatest extent. The optimal path tree constructed by taking the electricity-preserving object as the root is a positive sequence tree, and the optimal path tree constructed by taking the power supply as the root is a negative sequence tree. When the forward sequence tree is expanded, the nodes adjacent to the nodes are the out-degree nodes, and the adjacent nodes of the nodes in the reverse sequence tree are the in-degree nodes. According to the generation principle of the optimal path tree, the out-degree topological adjacency information and the in-degree topological adjacency information of the nodes need to be stored at the same time, so that the path obtained after the junction nodes are spliced is an accessible path from the electricity-protection object to the power supply point. And respectively forming the selection of an optimization scheme by taking the shortest path, the minimum switching action and the minimum network loss as an optimization objective function.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
the analysis of the plans of electrification, power conservation and planned power failure is realized; the digital preplan system of the power distribution network with the integrated graph and model fully utilizes the visual display technology of graphs, improves the informatization level of the power distribution network, visually and clearly gives the search path of the preplan, and has the technical effect of improving the working accuracy of scheduling personnel.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
fig. 1 is a schematic structural diagram of a digital preplan information supporting platform of a power distribution network in the present application;
FIG. 2 is a schematic diagram of the automatic digital pre-plan generation system of the present application;
fig. 3 is a schematic diagram of a power conservation scheme generation process in the present application.
Detailed Description
The invention provides a graph-mode integrated digital preplan system for a power distribution network, which solves the technical problems of low digitalization degree, inconvenient search and query, difficult modification and update and poor resource sharing in the conventional preplan system, and realizes the technical effects of multiple functions, higher informatization degree, convenient search and convenient sharing of the preplan system.
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The first embodiment is as follows:
in the first embodiment, a graph-model integrated digital preplan system for a power distribution network is provided, which comprises a graph-model integrated data platform; the automatic generation system of the digital plan on the basis of the method. The graph-model integrated data platform is a physical basis of power distribution network information integration and a technical basis of a power distribution network digital plan. The digital plan provides graphical expression and a human-computer interaction interface for important user power supply, power loss of a power supply point, and accident treatment of an important power transmission line.
As shown in FIG. 1, the platform adopts a multilayer architecture, and the equipment layer adopts the editing and development of the distribution network equipment information graph based on CIM/SVG graph-model integration to realize the association of the graph data information. The data layer realizes the interface and data exchange of various data, collects various online and offline data, and realizes the data interaction of the upper layer and the lower layer through a data bus. The application layer realizes various functions of the graph-model integrated digital preplan of the power distribution network. The presentation layer is used for completing presentation of the electronic plan based on the power grid main wiring diagram, providing path and equipment parameter property representation of the plan, performing centralized presentation from the whole and the local, and performing data exchange with the application layer through a data bus.
As shown in fig. 2, the functions of the graph-model integrated digital preplan system for the power distribution network include: graph management, plan management, and file management. The graph management has the main function of drawing and managing combined electrical equipment such as a primary main wiring diagram of a distribution network, a substation electrical wiring diagram, a ring main unit and the like. The user can arbitrarily enlarge and reduce the graphics and realize the nesting of different graphics files so as to quickly acquire the required information. It is the basis of the whole system. The plan management analyses the blackouts of the users to which it is connected for the repair or failure of some lines or buses in the distribution network. The method can arbitrarily set the running state of the equipment, such as the voltage loss or outage condition of a transformer substation and a power plant in a distribution network, adopts the electrified analysis on a graphical interface to search the connection relation, judges the running state (the equipment is not electrified and is gray), dynamically colors the equipment and provides a corresponding exit equipment list. The plan realization of the power supply scheme of the important user is an intelligent expression integrating the distribution network graph-model integration and the distribution network optimization algorithm. The file management mainly realizes the standardization of management and the sharing of resources. The inversion of the plan is to demonstrate the corresponding steps from the new steps of the generated plan; the feasibility analysis of the plan is mainly to perform physical check on the generation process of the plan and to judge whether the basic operation condition of the power grid can be met.
Topology searching based on graph-model integration is the basis for realizing system functions. The topology analysis mainly has the functions of modeling network physical nodes into bus models for calculation and integrating buses with electrical connection into an electrical island according to the states of the switches and the states of the network elements. Due to the complexity of the urban distribution network, the wiring modes of substations, switchyards, switches inside a ring main unit and the like cannot be included in detail in a primary main wiring diagram, but the change of the states of the switches and the breakers can affect the change of the wiring mode of the whole network. In order to describe the distribution network information in detail, the system can analyze the graphic connection states respectively placed in different graphic files in a centralized manner through the association relationship, and establish the connection relationship through the association relationship, wherein the connection relationship comprises a primary wiring diagram of the distribution network and a specific connection relationship diagram of the equipment. The topology analysis of the system comprises two parts: firstly, topology analysis is carried out on a primary main wiring diagram of a distribution network to establish the connection relation, and secondly, topology analysis is carried out on a transformer substation, a switch station, a ring main unit and the like to establish the connection relation. Finally, a network topology analysis result of graph nesting, namely the topology analysis of the whole network model, can be formed.
As shown in fig. 3, in the plan analysis, the power supply condition of the important user is usually analyzed to ensure the reliability of the power utilization. The forming of the power protection scheme comprises the following steps: 1. setting a system operation mode; 2. graphical designation of faulty devices; 3. graphical designation of power conservation loads; 4. graphical designation of power supply points; 5. automatic search generation of power supply paths; 6. automatic checking of the power supply path; 7. inversion of the supply path; 8. forming a pre-arranged password; 9. and (5) storing a plan. Wherein: and the automatic search of the power supply path in the step 5 can be selectively realized by taking the shortest path, the minimum switching action and the minimum network loss as an optimization objective function. And 6, automatically checking the power supply path mainly according to the capacity and the state of the equipment. The formed power protection scheme should satisfy the following constraint conditions: (1) power flow constraint of the power distribution network; (2) node voltage, current constraints; (3) constraints on the state of the device.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
one or more technical solutions provided by the present application have at least the following technical effects or advantages:
the analysis of the plans of electrification, power conservation and planned power failure is realized; the digital preplan system of the power distribution network with the integrated graph and model fully utilizes the visual display technology of graphs, improves the informatization level of the power distribution network, visually and clearly gives the search path of the preplan, and has the technical effect of improving the working accuracy of scheduling personnel.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A graph-model integrated digital preplan system for a power distribution network, the system comprising:
the power distribution network digital plan information support platform is used for providing power distribution network digital plan related information for the digital plan automatic generation system;
the system comprises a digital plan automatic generation system, a power distribution network digital plan automatic generation system and a power distribution network digital plan automatic generation system, wherein the digital plan automatic generation system is used for automatically generating electrified, power-conserving and planned power failure plans based on the relevant information of the power distribution network digital plan, and performing feasibility checking, saving, inquiring and inversion processing on the generated plans;
the digital plan information supporting platform comprises: the device comprises a device layer, a data layer, an application layer and a presentation layer;
the device layer is used for acquiring primary devices, data acquisition information and data association information of the power distribution network and performing information interaction with the data layer through a network channel;
the data layer is a database of a digital plan information support platform of the power distribution network, collects various off-line and on-line information, and performs bidirectional data exchange with the upper application layer through a data bus;
the application layer is embodied by the application function of the digital plan of the power distribution network and is used for carrying out graphic management, plan management and file management;
the display layer is used for completing the display of the electronic plan based on the main wiring diagram of the power grid, providing the path of the plan and the property representation of the equipment parameter, and exchanging data with the application layer through a data bus;
the automatic digital plan generating system specifically comprises:
the graphic management unit is used for searching a power grid wiring diagram, and performing equipment addition and deletion maintenance processing;
a protocol management unit to: setting equipment states, analyzing power loss of a power supply point, analyzing circuit faults and power loss, and managing power supply schemes of important users;
a file management unit to: and carrying out inversion of the plan, carrying out feasibility analysis of the plan, storing the plan and searching the plan.
2. The digital preplan system of distribution network with integrated drawing and modeling as claimed in claim 1, wherein the digital preplan information support platform of distribution network uses vector graphics SVG in open file format as the presentation of the distribution network device information graphics, and edits and develops the distribution network device information graphics based on CIM/SVG drawing and modeling integration.
3. The graph-model integrated digital preplan system for the power distribution network according to claim 1, wherein:
the graph management is to realize the drawing and management of the combined electrical equipment of the distribution network, and a user can enlarge and reduce graphs and realize the nesting of different graph files;
the plan management is the operation state of the setting equipment, the connection relation of the setting equipment is searched by adopting the electrified analysis on a graphical interface, and the operation state of the setting equipment is judged, so that the setting equipment is dynamically colored, and a corresponding exit equipment list is given.
4. The graph-model integrated digital preplan system for the distribution network according to claim 2, wherein the preplan system is designed in an object-oriented manner, and divides the distribution network devices into various categories, and when defining the attributes of a certain category of primitives, inherits some attributes in a parent category of the primitives, and then self-defines the attributes which are not included in the parent category of the primitives; the predetermined plan system establishes the mutual association relationship between the electrical equipment through the equipment ID, and can draw various wiring diagrams of the power system with connection meanings based on the integration of the diagram and the model library.
5. The graph-model integrated digital preplan system for the power distribution network according to claim 2, wherein the preplan system is capable of performing topology search based on graph-model integration; the predetermined plan system can intensively analyze the connection status of the graphs respectively placed in different graph files through the association relationship, and establish the connection relationship between the graph files through the association relationship; the topology analysis of the preplan system includes two parts: firstly, topology analysis is carried out on a primary main wiring diagram of a distribution network to establish the connection relation, and secondly, topology analysis is carried out on a transformer substation, a switch station and a ring main unit to establish the connection relation, so that a network topology analysis result with nested graphs is formed.
6. The graph-model integrated digital preplan system for the power distribution network according to claim 1, wherein the preplan system is capable of performing optimal selection of a power conservation scheme, and the optimal selection of the power conservation scheme is to search a path between a power conservation object and a power supply; the optimal path tree constructed by taking the electricity-preserving object as the root is a positive sequence tree, and the optimal path tree constructed by taking the power supply as the root is a negative sequence tree; when the positive sequence tree is expanded, the nodes adjacent to the nodes are the out-degree nodes of the positive sequence tree, and the adjacent nodes of the nodes in the reverse sequence tree are the in-degree nodes of the positive sequence tree; and respectively forming the selection of an optimization scheme by taking the shortest path, the minimum switching action and the minimum network loss as an optimization objective function.
7. The graph-model integrated digital preplan system for the power distribution network according to claim 1, wherein the preplan system is capable of analyzing the power supply situation of an important user to form a power conservation scheme, and the power conservation scheme specifically includes:
the first step is as follows: setting the operation mode of a plan system; the second step is that: carrying out graphic designation of the fault equipment; the third step: carrying out graphic designation of the electricity-keeping load; the fourth step: carrying out graphic designation of power supply points; the fifth step: performing automatic search generation of a power supply path; and a sixth step: performing automatic check of the power supply path; the seventh step: performing inversion of the power supply path; eighth step: forming a pre-arranged password; the ninth step: and (5) storing the plan.
8. The graph-model integrated power distribution network digital planning system of claim 7, wherein the automatic search of the 5 th-step power supply path is selectively implemented by taking the shortest path, the minimum switching action and the minimum network loss as an optimization objective function; 6, automatically checking the power supply path according to the capacity and the state of the equipment; the formed power protection scheme meets the following constraint conditions: (1) power flow constraint of the power distribution network; (2) node voltage, current constraints; (3) constraints on the state of the device.
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| CN109547448B (en) * | 2018-11-29 | 2020-12-11 | 国网山东省电力公司枣庄供电公司 | Double-system data universal matching method determined based on path name and double-identification mechanism |
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