CN111428376A - CIM (common information model) -based power distribution network feeder contact mode identification method and system - Google Patents
CIM (common information model) -based power distribution network feeder contact mode identification method and system Download PDFInfo
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Abstract
The invention discloses a power distribution network feeder contact mode identification method and a system based on a CIM model, which comprises the steps of analyzing node information and branch information in an XM L file, establishing a CIM topological network structure, obtaining a network topological graph, judging whether two power distribution network feeders exist in a switch branch circuit at the same time by using the CIM topological network structure, analyzing the contact relation of a judgment result, regarding a single feeder as a node, regarding a contact line between the feeders as a side, establishing a corresponding feeder contact relation graph, and identifying and judging the power distribution network feeder connection mode existing in a power distribution network by using the feeder contact relation graph.
Description
Technical Field
The invention relates to the technical field of distribution network automation and power grids, in particular to a distribution network feeder line contact mode identification method and system based on a CIM (common information model).
Background
The construction of a first-class power distribution network is accelerated, the increasing demand of people for good living energy is met, and the method is an important mission for the development of a new-era power grid. With the continuous deepening of the concept and construction of the digital power grid, the automation of the power distribution network can play a key role of more and more cores. When the distribution optimization problem of the distribution automation terminal is researched, a plurality of feeders need to be considered at the same time, namely, the contact relation among the feeders needs to be known; in addition, when distribution automation transformation is carried out, feeders which are possibly involved in transformation need to be sequenced first, and the contact mode of the feeders needs to be known in the sequencing process; most importantly, load transfer is carried out through switching operation after the power distribution network fails, and the information of the contact relation of the feeder line is very important. Therefore, distribution network feeder wiring pattern recognition is an important element in distribution network automation.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above-mentioned conventional problems.
Therefore, the invention provides a CIM model-based power distribution network feeder contact mode identification method, which can intuitively identify the power distribution network feeder connection mode.
The technical scheme includes that node information and branch information in an XM L file are analyzed, a CIM-level topological network structure is established, a network topological graph is obtained, the CIM topological network structure is utilized to judge whether two power distribution network feeders exist in a switch branch at the same time, the contact relation of a judgment result is analyzed, a single feeder is regarded as a node, a contact line among the feeders is regarded as one side, a corresponding feeder contact relation graph is established, and the feeder contact relation graph is utilized to identify and judge the wiring mode of the power distribution network feeders existing in a power grid.
As an optimal scheme of the method for identifying the contact mode of the feeder line of the power distribution network based on the CIM, the method comprises the following steps: mapping a distribution network feeder CIM model to obtain a tree-shaped topological structure, wherein a unique power source node and a corresponding power line branch exist, and a transformer substation outgoing line switch in a CIM specification is used for unique definition; the tree topology structure comprises a node type and a branch type.
As an optimal scheme of the method for identifying the contact mode of the feeder line of the power distribution network based on the CIM, the method comprises the following steps: the node types comprise contact nodes, terminal nodes, bus sections and distribution transformer terminals; the branch circuit type comprises a virtual support, an overhead insulated conductor section, an overhead bare conductor section, a cable section, a circuit breaker, a negative control switch, a sectionalizer and a transformer winding.
As a preferable scheme of the method for identifying the distribution network feeder contact mode based on the CIM model, the CIM level topological network structure is established, and the method comprises the steps of analyzing the XM L file in a certain sequence, and adding the power supply node, the connecting node, the terminal station, the bus, the AC line partition, the circuit breaker, the load interruption switch, the isolating switch, the transformer winding, the junction and the service delivery point.
As an optimal scheme of the method for identifying the contact mode of the feeder line of the power distribution network based on the CIM, the method comprises the following steps: judging whether the switch branch has the two power distribution network feeders at the same time, wherein the step of comparing the unified identification ID of each node and the branch one by one is included; and if the two distribution network feeders exist in a certain node or branch, the two distribution network feeders are shared branches.
As an optimal scheme of the method for identifying the contact mode of the feeder line of the power distribution network based on the CIM, the method comprises the following steps: identifying the distribution network feeder line connection mode comprises identifying the distribution network feeder line connection mode by using a judgment rule of the distribution network feeder line connection mode; determining whether the connection mode is a two-supply one-standby or one-supply more-standby connection mode; and defining that one of the related feeder lines is in a standby state, and judging by combining the load level of the feeder line.
As an optimal scheme of the method for identifying the contact mode of the feeder line of the power distribution network based on the CIM, the method comprises the following steps: the judgment rule of the distribution feeder wiring mode comprises that when the number of connected subgraph nodes is 1, the feeder is not connected; when the number of the connected subgraph nodes is 2, a hand-in-hand wiring mode is adopted; and when the number of the connected subgraph nodes is more than 4, the connection mode is not typical.
As an optimal scheme of the method for identifying the contact mode of the feeder line of the power distribution network based on the CIM, the method comprises the following steps: the judgment rule of the distribution feeder line connection mode further comprises that when the number of the connected subgraph nodes is 3, the connection mode comprises a triple-network connection mode when all the node degrees are 2, or a two-supply one-standby and atypical connection mode when not all the node degrees are 2; when the number of the connected subgraph nodes is 4, the four-connection wiring mode is adopted when all the node degrees are 2, or the three-supply-one-standby and atypical wiring mode is adopted when not all the node degrees are 2.
The preferred scheme of the power distribution network feeder contact mode identification system based on the CIM model comprises a data center module and an identification module, wherein the data center module is used for analyzing XM L file information, storing data results, judging results, analyzing results and identifying results and comprises a solver and an output management unit, the solver is used for decoding branch information and node information, reading CIM data streams and establishing a CIM network topology structure, the output management unit is used for performing data conversion and outputting the network topology diagram and the feeder contact relation diagram, the judging module is connected with the data center module and is used for judging whether the two power distribution network feeder lines exist in the switch branch at the same time, the analyzing module is used for reading the CIM network topology structure and analyzing the contact relation of the judging results to form the data streams of the feeder contact relation and sending the data streams to the output management unit to form the feeder contact relation diagram, and the identification module is used for identifying the feeder connection mode.
The invention has the beneficial effects that: the method is easy to realize, the process is visual and clear, the obtained result is suitable for the distribution point optimization problem of the automatic terminal of the power distribution network, the feeder sequencing problem of automatic transformation of the power distribution network and the load transfer problem of the power distribution network, the method has wide applicability, and the operation level and the benefit of the power distribution network can be greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic flowchart of a method for identifying a distribution network feeder contact mode based on a CIM model according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a process for establishing a CIM-level topology network structure of a method for identifying a feeder contact manner of a power distribution network based on a CIM model according to a first embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a rule for determining a feeder connection method according to the method for identifying a distribution network feeder contact method based on a CIM model according to the first embodiment of the present invention;
fig. 4 is a schematic diagram of a CIM-level topology network of an actual feeder line according to the method for identifying a distribution network feeder contact mode based on a CIM model according to the first embodiment of the present invention;
fig. 5 is a schematic diagram of a distribution network feeder contact relationship of an actual feeder line according to the distribution network feeder contact pattern recognition method based on a CIM model according to the first embodiment of the present invention;
fig. 6 is a schematic diagram of several typical connection modes of an actual feeder line of the distribution network feeder line contact mode identification method based on the CIM model according to the first embodiment of the present invention;
fig. 7 is a schematic diagram of the overall structural distribution of a distribution network feeder contact identification system based on a CIM model according to a second embodiment of the present invention;
fig. 8 is a schematic diagram of a module distribution network of a distribution network feeder contact identification system based on a CIM model according to a second embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Due to the rapid development of the power grid, the number of feeders is rapidly increased, and the contact relationship among the original feeders is also changed continuously, so that in an actual situation, even operating personnel cannot clear the contact relationship among different feeders, a feeder contact mode identification method capable of clearing the current running situation of the regional power grid is urgently needed, high-quality data support is provided for optimizing the power grid running mode, the power grid running weak area can be identified, the reliability improvement path is determined, the problem of managing the power grid running mode is effectively solved, and the working pressure of the power grid operation and maintenance personnel is greatly reduced.
Referring to fig. 1 to 6, a first embodiment of the present invention provides a method for identifying a distribution network feeder contact mode based on a CIM model, including:
s1, analyzing the node information and the branch information in the XM L file, establishing a CIM-level topological network structure, and acquiring a network topological graph, wherein the description is as follows:
mapping a distribution network feeder CIM model to obtain a tree-shaped topological structure, wherein a unique power source node and a corresponding power line branch exist, and a transformer substation outgoing line switch in a CIM specification is used for unique definition;
the tree topology includes a node type and a branch type.
Specifically, the node types include:
contact node, terminal node, busbar section, distribution transformer terminal.
The branch types include:
the device comprises a virtual support, an overhead insulated conductor section, an overhead bare conductor section, a cable section, a circuit breaker, a negative control switch, a sectionalizer and a transformer winding.
Further, referring to fig. 2, a CIM-level topology network structure is established, which includes:
analyzing the XM L file according to a certain sequence;
adding power nodes, connection nodes, termination, bus bars, AC line splitting, circuit breakers, load break switches, disconnectors, transformer windings, junctions, service delivery points (connectitvinode, Terminal, BusbarSection, AC L ineSegement, Breaker, L oad Breaker switch, disconnect, transformer winding, Junction, servicedelaverypoint).
S2: and judging whether two power distribution network feeders simultaneously exist in the switch branch by utilizing the CIM topological network structure. The steps to be explained are as follows:
comparing the uniform identification IDs of each node and each branch one by one;
and if two distribution network feeders exist in a certain node or branch, the two distribution network feeders are shared branches.
S3: and analyzing the contact relation of the judgment result, regarding a single feeder line as a node, regarding a contact line among the feeder lines as an edge, and establishing a corresponding feeder line contact relation graph.
S4: and identifying and judging the distribution network feeder connection mode existing in the power grid by using the feeder contact relation diagram. It should be further noted that identifying the connection mode of the feeder line of the power distribution network includes:
identifying the distribution network feeder line connection mode by using the judgment rule of the distribution network feeder line connection mode;
determining whether the connection mode is a two-supply one-standby or one-supply more-standby connection mode;
one of the feeders involved in the definition is in a standby state, and judgment is carried out by combining the load level of the feeder.
Specifically, referring to fig. 3, the rule for determining the wiring manner of the distribution feeder includes:
when the number of the connected sub-graph nodes is 1, the number is not the number of the connected sub-graph nodes is a non-contact feeder line;
when the number of the connected subgraph nodes is 2, a hand-in-hand wiring mode is adopted;
when the number of the connected subgraph nodes is 3, a triple-network connection mode is adopted when all the node degrees are 2, or a two-supply one-standby and atypical connection mode is adopted when not all the node degrees are 2;
when the number of the connected subgraph nodes is 4, the four-connection wiring mode is adopted when all the node degrees are 2, or the three-supply one-standby and atypical wiring mode is adopted when not all the node degrees are 2;
and when the number of the connected subgraph nodes is more than 4, the connection mode is not typical.
The method comprises the steps of establishing a CIM-level topological network which accords with IEC61968/61970 standard after an XM L file is analyzed, and then identifying shared branches among different feeders by using IDs in the CIM-level topological network, wherein the number of the feeders of a general area distribution network is limited, the contact relation among the feeders does not change frequently, the contact relation can be judged by adopting an exhaustion method, the unified identification IDs (uniquely specified by a power grid company) of each node and each branch are compared one by one, when a certain node or branch is found to have two feeders at the same time, the two feeders are considered to be shared branches, and the two feeders only have one branch usually, so that data between the two feeders are not processed in the following traversal process after the relation of the certain two feeders is judged, and the time required by traversal is saved.
Preferably, referring to fig. 2, the creating of the CIM-level topology object specifically includes:
①, initializing CIM level topology network objects, analyzing ID of power supply nodes from GIS XM L data when node and edge sets are empty, establishing CIM node objects and adding the CIM node objects into the network, and setting SourceID attributes and FeederID attributes of the network.
②, analyzing the ID information of all ConnectiontNodes from GIS XM L data, establishing corresponding CIM nodes and adding the CIM nodes into the network.
③ analyzing ID information of all Terminal from GIS XM L data, establishing corresponding CIM node and adding to network, each Terminal has and only one corresponding connectivityNode, so finding this connectivityNode for each Terminal and establishing a branch between them, if XM L data is incomplete, some terminals can not find corresponding connectivityNode, then sending out data error prompt.
④, analyzing ID information of all BusbarSections from GIS XM L data, establishing corresponding CIM nodes and adding the CIM nodes into the network, wherein each BusbarSection usually has only one Terminal corresponding to the BusbarSection, so that the Terminal is found for each BusbarSection, and a branch is established between the BusbarSection and the Terminal, and if the XM L data is incomplete, the data error prompt will be sent if some BusbarSections can not find the corresponding Terminal.
⑤ analyzes ID information of all AC L ineSegement from GIS XM L data, establishes CIM branch and connects corresponding Terminal nodes at two ends in the network, judges and sets the type of the alternating current line segment (which may be a cable, an overhead insulated conductor, an overhead bare conductor, etc.), and judges and sets the container object and the container type to which the alternating current line segment belongs.
⑥ analyzes ID information of all switch branches (Breaker, L oad Breaker switch, Connector, etc.) from GIS XM L data, establishes CIM branches and connects to corresponding Terminal nodes at two ends in the network, judges and sets the type of the switch branch, judges whether the switch branch is a switch with distribution automation transformation capability, and sets the current distribution automation level of the switch.
⑦, analyzing ID information of all transformerwining from GIS XM L data, finding out a unique Terminal node corresponding to the ID information, setting the ID of the transformer to which a transformer winding belongs as a virtual node, establishing a CIM branch and connecting the Terminal node and the virtual node, judging and setting the type of an alternating current line section (possibly a cable, an overhead insulated conductor, an overhead bare conductor and the like), and setting information such as rated capacity, user number and the like of the transformer.
⑧, analyzing ID information of all junctions from GIS XM L data, and establishing CIM branches and connecting corresponding Terminal nodes at two ends in the network.
⑨ analyzes the ID information of all ServiceDeliveryPoint from GIS XM L data, establishes CIM branch and connects with Terminal nodes at two corresponding ends in the network.
The distribution network feeder contact mode identification has the function of comparing the economical efficiency and the reliability of different types of wiring modes of a certain power supply area under different load densities, so as to determine an optimized power supply scheme, namely, a scheme which can meet the power supply reliability of a user and has better economical efficiency is selected according to different conditions, specifically, the wiring modes comprise:
(1) and (3) outgoing: a set of closed switches and a certain group of line segments led out from a bus or an outlet terminal of the transformer substation;
(2) wiring mode group: all outgoing line sets connected through in-station or interconnection switches are called a connection mode group (a power supply unit in a power grid usually does not only contain one outgoing line, and interconnection switches are usually required to be arranged on a circuit or a bus connector is arranged in a transformer substation to improve the power supply reliability so as to enable the power grid to be robust and perfect and meet the power supply reliability), for example, 3T connection and chain connection of a high-voltage power distribution network, and N-1 main equipment connection and multi-section multi-connection of a medium-voltage power distribution network;
(3) a communication switch: a disconnecting switch connected with the two outgoing lines and adopting a breaker as a tie switch;
(4) and (3) feeder line partitioning: searching other switches from a certain switch in the following direction, stopping searching when the tail end of the next switch line is searched in all directions, and taking the switches as boundaries to connect an area called as an area node or a net rack segment;
(5) an active section switch: a switch capable of sectionally loading (namely, the net rack sections at the two sides of the switch are all connected with a switch of a load);
(6) a trunk line: in a typical structure of a medium-voltage distribution network, an opposite end is provided with a link for connecting outgoing lines or a single radiating line with the longest line diameter;
(7) branching a line: a non-trunk portion of the outlet;
(8) actual number of contacts: the number of outgoing lines connected with a certain outgoing line;
(9) actual number of segments: when a certain section of line of a certain outgoing line has a fault, the number of the outgoing lines which can be supplied to the certain section of line is at most the sum under the condition of ensuring no ring formation.
The traditional feeder line identification method only analyzes the grid structure of the power distribution network (namely, analyzes the part between the outlet of a power station and the inlet of a load station), and does not consider the connection structure inside the power station and the access mode of the load station during analysis.
Further, in order to verify the real effect of the method of the present invention, taking judgment of the feeder connection relationship of the huizhou brilliant station construction route F7 as an example, compared with the conventional identification method, the technical effect adopted by the method of the present invention is further explained, referring to fig. 4, a CIM-level topology network structure diagram corresponding to the huizhou brilliant station construction route F7 feeder includes 1642 CIM nodes and 1641 CIM branches (logical virtual nodes and virtual branches); removing 1717 residual effective feeder line data which have errors in the original data in the feeder line data of the Huizhou area and cannot be analyzed and calculated, referring to FIG. 5, regarding a single feeder line as a node according to the result of the judgment of the contact relationship, regarding the contact relationship among the feeder lines as an edge, constructing a corresponding feeder line contact relationship diagram, reading various connection modes of the feeder lines from the node, referring to FIG. 6, wherein the typical connection modes are shown in the following table, and the time for specifically identifying the feeder line contact modes is shown in the following table:
table 1: a read schedule is identified.
| Wiring mode | Time/min recognition by traditional method | The method identifies time/min |
| Non-contact feeder line | 12 | 2 |
| Hand-pulling hand-connecting wire | 15 | 5 |
| Two-supply one-standby connection wire | 30 | 10 |
| Atypical connection | 16 | 4 |
Preferably, the calculation time required for completing the feeder line contact relationship judgment in the scale of fig. 5 is several minutes to tens of minutes (depending on the specific situation of the used calculation hardware), wherein the main time is the time for importing thousands of feeder line information, and as compared with the conventional identification method and the identification time of the identification method of the present invention, the method of the present invention uses less time in reading the same wiring mode, thereby verifying that the method of the present invention has wide applicability and can greatly improve the operation level and the benefit of the power distribution network, and if the contact relationship between the feeder lines is updated only for weeks or even months, the identification time of the method of the present invention is more applicable.
Example 2
Referring to fig. 7 and 8, a second embodiment of the present invention, which is different from the first embodiment, provides a distribution network feeder contact identification system based on a CIM model, including:
the data center module 100 is configured to parse XM L file information, store a data result, determine a result, analyze a result, and identify a result, and includes a solver 101 and an output management unit 102, where the solver 101 is configured to decode branch information and node information, read a CIM data stream, establish a CIM network topology structure, and the output management unit 102 is configured to perform data conversion and output a network topology diagram and a feeder line contact relationship diagram.
The judging module 200 is connected to the data center module 100, and the judging module 200 is configured to judge whether two feeder lines of the power distribution network exist in a switching branch at the same time.
And the analysis module 300 is configured to read the CIM network topology, analyze the contact relationship of the determination result, form a data stream of the feeder contact relationship, and send the data stream to the output management unit 102 to form a feeder contact relationship diagram.
And the identification module 400 is used for identifying the wiring mode of the feeder line of the power distribution network.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, the operations of processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described herein (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described herein includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein. A computer program can be applied to input data to perform the functions described herein to transform the input data to generate output data that is stored to non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
As used in this application, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being: a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of example, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A CIM model-based power distribution network feeder contact mode identification method is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
analyzing node information and branch information in the XM L file, establishing a CIM-level topological network structure, and acquiring a network topological graph;
judging whether two power distribution network feeders exist in a switch branch circuit simultaneously or not by utilizing the CIM topological network structure;
analyzing the contact relation of the judgment result, regarding a single feeder line as a node, regarding a contact line among the feeder lines as an edge, and establishing a corresponding feeder line contact relation graph;
and identifying and judging the distribution network feeder connection mode existing in the power grid by using the feeder contact relation diagram.
2. The CIM model-based power distribution network feeder contact mode identification method of claim 1, wherein: mapping a distribution network feeder CIM model to obtain a tree-shaped topological structure, wherein a unique power source node and a corresponding power line branch exist, and a transformer substation outgoing line switch in a CIM specification is used for unique definition;
the tree topology structure comprises a node type and a branch type.
3. The CIM model-based distribution network feeder contact identification method of claim 1 or 2, wherein: the node types include, for example,
the system comprises a contact node, a terminal node, a bus segment and a distribution transformer terminal;
the branch circuit type comprises a virtual support, an overhead insulated conductor section, an overhead bare conductor section, a cable section, a circuit breaker, a negative control switch, a sectionalizer and a transformer winding.
4. The CIM model-based power distribution network feeder contact mode identification method of claim 1, wherein: establishing the CIM-level topological network structure, including,
analyzing the XM L file according to a certain sequence;
the power supply node, the connection node, the terminal station, the bus, the AC line segmentation, the circuit breaker, the load interruption switch, the isolating switch, the transformer winding, the junction and the service delivery point are added.
5. The CIM model-based distribution network feeder contact identification method of claim 1 or 4, wherein: determining whether the two distribution network feeders of the switching branch exist at the same time, including,
comparing the unified identification IDs of each node and each branch one by one;
and if the two distribution network feeders exist in a certain node or branch, the two distribution network feeders are shared branches.
6. The CIM model-based power distribution network feeder contact mode identification method of claim 5, wherein: identifying the distribution network feeder wiring pattern includes,
identifying the distribution network feeder line connection mode by using the judgment rule of the distribution network feeder line connection mode;
determining whether the connection mode is a two-supply one-standby or one-supply more-standby connection mode;
and defining that one of the related feeder lines is in a standby state, and judging by combining the load level of the feeder line.
7. The CIM model-based distribution network feeder contact identification method of claim 1 or 6, wherein: the judgment rule of the wiring mode of the distribution feeder line comprises,
when the number of the connected sub-graph nodes is 1, the number is not the number of the connected sub-graph nodes is a non-contact feeder line;
when the number of the connected subgraph nodes is 2, a hand-in-hand wiring mode is adopted;
and when the number of the connected subgraph nodes is more than 4, the connection mode is not typical.
8. The CIM model-based power distribution network feeder contact mode identification method of claim 7, wherein: the judgment rule of the wiring mode of the distribution feeder line also comprises,
when the number of the connected subgraph nodes is 3, a triple-network connection mode is adopted when all the node degrees are 2, or a two-supply one-standby and atypical connection mode is adopted when not all the node degrees are 2;
when the number of the connected subgraph nodes is 4, the four-connection wiring mode is adopted when all the node degrees are 2, or the three-supply-one-standby and atypical wiring mode is adopted when not all the node degrees are 2.
9. The utility model provides a distribution network feeder contact mode identification system based on CIM model which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the data center module (100) is used for analyzing the XM L file information, storing a data result, the judging result, an analyzing result and a recognition result, and comprises a solver (101) and an output management unit (102), wherein the solver (101) is used for decoding the branch information and the node information, reading CIM data streams and establishing the CIM network topology structure, and the output management unit (102) is used for data conversion and outputting the network topology diagram and the feeder line contact relationship diagram;
the judging module (200) is connected with the data center module (100), and the judging module (200) is used for judging whether the two power distribution network feeders exist in the switch branch circuit at the same time;
an analysis module (300) configured to read the CIM network topology, analyze the contact relationship of the determination result, form a data stream of the feeder contact relationship, and send the data stream to the output management unit (102) to form the feeder contact relationship graph;
and the identification module (400) is used for identifying the wiring mode of the feeder line of the power distribution network.
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