CN115982902A - Power grid topological relation identification method and device based on geographic coordinates - Google Patents
Power grid topological relation identification method and device based on geographic coordinates Download PDFInfo
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- CN115982902A CN115982902A CN202211491213.XA CN202211491213A CN115982902A CN 115982902 A CN115982902 A CN 115982902A CN 202211491213 A CN202211491213 A CN 202211491213A CN 115982902 A CN115982902 A CN 115982902A
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Abstract
The invention discloses a method and a device for identifying a power grid topological relation based on geographic coordinates, wherein the method comprises the following steps: acquiring coordinate data of all equipment in a power grid; setting a starting point longitude and latitude and a terminal point longitude and latitude of each device according to the coordinate data of each device; and traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment, if the starting point longitude and latitude of the equipment B is the same as the end point longitude and latitude of the equipment A, the equipment B is subordinate sub-equipment of the equipment A, the number of the equipment A is reserved as the index content of the equipment B, and the topological relation and the index of all the equipment are obtained by analogy. On the basis, according to the principle that loss is generated when current flows through a line or equipment, a distributed load acquisition device is installed between upper and lower-level equipment, electric parameter data are acquired to a database in real time, loss rate calculation is performed according to the established topological relation of the equipment, and verification is performed according to the positive and negative auxiliary topological relation of the loss rate. The method can effectively improve the identification efficiency of the topological relation of the power grid.
Description
Technical Field
The invention relates to the field of power system management, in particular to a power grid topological relation identification method and device based on geographic coordinates.
Background
With the continuous increase of the scale of the power grid, the types and the number of the electric power equipment in the power grid are continuously increased, the topological structure of the power grid is also more and more complex, tens of thousands of public distribution transformers are arranged in one city, and hundreds of users and nearly thousands of equipment are generally arranged under one public distribution transformer. The equipment types of the distribution network model data mainly comprise a transformer, a capacitor, a switch, a wire outlet point, a tower, a bus, a cable section, a cable terminal, a wire section, an access point, a connecting wire, a bracket, a metering box and the like. The data of the network distribution model adopts geographic position coordinates, and the number of the coordinates of different equipment is different, for example, single-point equipment such as a tower, a bracket, a metering box, an access point and the like only have one group of coordinates; the linear devices such as the wire section, the connecting wire, the bus, the cable section and the like have two groups of coordinates; the capacitor and the switch have three sets of coordinates. Due to the huge data volume and the complex structure of the network distribution model, the time for carrying out system topology analysis during equipment searching is too long, and the requirements on real-time performance and practicability cannot be met.
In addition, the distribution network model data only comprise the basic equipment information and the geographic position coordinates and have no upper and lower topological relation, and the equipment coordinates of the distribution network model data are completely the same, so that the equipment is overlapped and cannot be identified by naked eyes. In actual work, if the topological relation of the distribution network needs to be clarified, a manual on-site verification and manual recording mode is generally adopted, and once the topological relation changes, the on-site verification needs to be carried out again, so that time and labor are consumed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a method and a device for identifying a power grid topological relation based on geographic coordinates, which can effectively improve the efficiency of identifying the power grid topological relation.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a power grid topological relation identification method based on geographic coordinates comprises the following steps:
s1) acquiring coordinate data of all equipment in a power grid;
s2) setting a starting point longitude and latitude and a finishing point longitude and latitude of each device according to the coordinate data of each device;
s3) traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment to obtain the topological relation and the index of all the equipment, and specifically comprising the following steps: and if the longitude and latitude of the starting point of the device B is the same as the longitude and latitude of the end point of the device A, the device B is a subordinate sub-device of the device A, and the serial number of the device A is reserved as the index content of the device B.
Further, step S2) includes the steps of:
if the current equipment only has one group of coordinate data, setting the starting point longitude and latitude and the end point longitude and latitude of the current equipment to be the longitude and latitude in the group of coordinate data;
if the current equipment has two or more groups of coordinate data, setting the starting point longitude and latitude of the current equipment as the longitude and latitude in the first group of coordinate data, and setting the finishing point longitude and latitude of the current equipment as the longitude and latitude in the last group of coordinate data.
Further, step S3) is followed by a step of verifying the topological relation, which specifically includes:
and acquiring the electric quantity of the target equipment as the power supply quantity, counting the electric quantities of all subordinate sub-equipment of the target equipment as the power selling quantity according to the topological relation, calculating the loss rate according to the power supply quantity and the power selling quantity, and if the loss rate is smaller than a preset value, determining that the topological relation of the target equipment and the subordinate sub-equipment is wrong.
Optionally, the preset value is 0.
Further, the loss rate is calculated as follows:
in the above formula, G is the electric quantity of the target device, X is the electric quantity of the kth subordinate sub-device of the target device, and n is the total number of subordinate sub-devices of the target device.
The invention also provides a device for identifying the topological relation of the power grid, which comprises the following components:
the data acquisition unit is used for acquiring coordinate data of all equipment in the power grid;
the longitude and latitude configuration unit is used for setting the starting point longitude and latitude and the end point longitude and latitude of each device according to the coordinate data of each device;
and the topology construction unit is used for traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment, if the starting point longitude and latitude of the equipment B is the same as the end point longitude and latitude of the equipment A, the equipment B is subordinate sub-equipment of the equipment A, and the serial number of the equipment A is reserved as the index content of the equipment B, so that the topology relation and the index of all the equipment are obtained.
Further, the latitude and longitude configuration unit is configured to perform the steps of:
if the current equipment only has one group of coordinate data, setting the starting point longitude and latitude and the end point longitude and latitude of the current equipment to be the longitude and latitude in the group of coordinate data;
if the current equipment has two or more groups of coordinate data, setting the starting point longitude and latitude of the current equipment as the longitude and latitude in the first group of coordinate data, and setting the finishing point longitude and latitude of the current equipment as the longitude and latitude in the last group of coordinate data.
The system further comprises a topological relation verification unit, which is used for collecting the electric quantity of the target equipment as the power supply quantity, counting the electric quantity of all subordinate sub-equipment of the target equipment as the power selling quantity according to the topological relation, calculating the loss rate according to the power supply quantity and the power selling quantity, and if the loss rate is smaller than a preset value, the topological relation of the target equipment and the subordinate sub-equipment is wrong.
The invention also provides a computer system comprising a computer programmed or configured to execute any one of the geographic coordinate-based grid topology relationship identification methods.
The present invention also proposes a computer-readable storage medium storing a computer program programmed or configured to execute any of the geographical coordinate-based grid topology relationship identification methods.
Compared with the prior art, the invention has the advantages that:
according to the obtained device coordinates, the starting point longitude and latitude and the end point longitude and latitude of the device are set, all the devices are traversed according to the starting point longitude and latitude and the end point longitude and latitude, if the starting point longitude and latitude of the device B is the same as the end point longitude and latitude of the device A, the device B is a lower-level sub-device of the device A, and the serial number of the device A is reserved as the index content of the device B. Therefore, the index is established while the topological relation is analyzed, and the topological analysis is not needed to be carried out temporarily in the subsequent equipment searching process, so that the topological analysis time is saved, and the searching speed is greatly increased.
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FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
The embodiment provides a geographic coordinate-based power grid topological relation recognition method, which is used for solving the problems that the existing power grid structure has no topology and master-slave relation and the analysis efficiency of the power distribution network topology is too low, and as shown in fig. 1, the method comprises the following steps:
s1) acquiring coordinate data of all equipment in a power grid;
s2) setting a starting point longitude and latitude and a finishing point longitude and latitude of each device according to the coordinate data of each device;
s3) traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment to obtain the topological relation and the index of all the equipment, and specifically comprising the following steps: if the longitude and latitude of the starting point of the device B is the same as the longitude and latitude of the end point of the device A, the device B is a subordinate sub-device of the device A, and the serial number of the device A is reserved as the index content of the device B;
and S4) acquiring the electric quantity of the target equipment as a power supply quantity, counting the electric quantity of all subordinate sub-equipment of the target equipment as a power selling quantity according to the topological relation, calculating a loss rate according to the power supply quantity and the power selling quantity, and if the loss rate is smaller than a preset value, determining that the topological relation of the target equipment and the subordinate sub-equipment is wrong.
Through the steps, the topological relation is analyzed based on the same relation between the starting point longitude and latitude and the ending point longitude and latitude among different devices, the index is established, the topological relation is analyzed, the index is also established, the topological analysis is not needed to be carried out temporarily during subsequent device searching, the topological analysis time is saved, and the searching speed is greatly improved. After the topological relation is analyzed, the topological relation is verified, so that the accuracy of topological analysis is improved.
In step S1) of this embodiment, the coordinate data of all devices in the power grid is power distribution grid model data obtained from the cloud of the graph model center, and includes device information data and coordinate data such as a wire segment and an electric energy meter, and is stored in the device information table of the local database.
In step S2) of this embodiment, because there are one, two, and three sets of coordinate data of the devices, generating the start-point longitude and latitude and the end-point longitude and latitude of each device also includes the following cases:
if the current equipment only has one group of coordinate data, setting the starting point longitude and latitude and the end point longitude and latitude of the current equipment to be the longitude and latitude in the group of coordinate data;
if the current equipment has two or more groups of coordinate data, and each group of coordinate data is arranged in sequence, the longitude and latitude of the starting point of the current equipment are set as the longitude and latitude in the first group of coordinate data, and the longitude and latitude of the finishing point of the current equipment are set as the longitude and latitude in the last group of coordinate data.
Specifically, the step S2) of generating the starting point longitude and latitude and the ending point longitude and latitude of each device includes the following steps:
adding a coordinate field in the local database equipment information table: the [ start point longitude ], [ start point latitude ], [ end point longitude ], [ end point latitude ], and the latitude information of the coordinate data of each device are filled in the corresponding fields according to the aforementioned rule.
In step S3) of this embodiment, establishing a topological relation based on the geographic coordinates of the target device and the other devices includes:
EndX a ＝StartX bi
EndY a ＝ StartY bi (1)
wherein EndX a ，EndY a Setting the total quantity of other lines and electric energy meters as l and StartX for the longitude and latitude of the line/electric energy meter terminal of the target equipment bi And StartY bi The initial longitude and latitude of the line/electric energy meter for other equipment, and the interval of i is [1,l]If the formula (1) is satisfied, the corresponding line or electric energy meter is a direct subordinate line or a direct subordinate electric energy meter of the target line. Traversing in such a way, and obtaining the upper-level and lower-level topological relation between the lead segments of each device and the electric energy meter.
In step S3) of this embodiment, before traversing the start-point longitude and latitude and the end-point longitude and latitude of all the devices, a field [ upper level device number ] corresponding to each device is newly added to the local database device information table, after determining the upper and lower level topological relationships according to the rule, the number of the upper level device of each device is filled in the corresponding [ upper level device number ] field, after completing traversing, the device topological relationship is completed, at this time, the analyzed device topological relationship is updated to the power distribution network model data at the cloud of the graph model center according to the device number, and the [ upper level device number ] is set as an index field. And when the query and search are carried out on the equipment subsequently, the temporary topology analysis is not needed, so that the topology analysis time is saved, and the search speed is greatly improved.
In step S4) of this embodiment, the distribution network distributed load monitoring terminal is installed on a lead segment of the target device, the distribution network distributed load monitoring terminal can automatically upload data of electric quantity, voltage and current of a monitoring point, the monitoring center in the background acquires electric quantity data of the device through an API interface of the measurement center, and acquires all subordinate user electric meter information of the target device by using the lead segment where the distribution network distributed load monitoring terminal is installed as a starting point, in combination with the power grid topology relationship obtained in step S3), and acquires user electric quantity data from a data center according to the electric meter information, that is, the electric quantity of each subordinate sub device, and calculates a loss ratio therefrom, the calculation formula is as follows:
in the above formula, G is the power of the target device, X is the power of the kth subordinate sub-device of the target device, and n is the total number of subordinate sub-devices of the target device
When the loss rate S is less than 0, the topological relationship between the target device and its subordinate sub-devices may have errors, and the original device information needs to be manually verified, thereby implementing verification of the line user topological relationship.
In step S4 of this embodiment, the distribution network distributed load monitoring terminals may also be installed on the lead segments of all the devices, and the target lead segment is taken as a starting point, and the power grid topological relation obtained in step S3) is combined to obtain the electric quantities of all the lower lead segments and the electric energy meter, where the electric quantity of the lead segment is provided by the installed distribution network distributed load monitoring terminal, and the electric quantity of the electric energy meter is obtained from the data center, so that the loss ratio calculation formula is as follows:
L＝(E a -E b -E c )/E a (3)
in the above formula, E a Is the electrical quantity of the target conductor segment, E b For the total quantity of electricity of all subordinate conductor segments, E c The total electric quantity of all subordinate electric energy meters is as follows:
the total electric quantity calculation formula of all lower-level conductor sections is as follows:
the calculation formula of the total electric quantity of all the lower-level electric energy meters is as follows:
in the above formula, k is the number of lower-level lead segments of the target lead segment, and m is the number of lower-level electric energy meters of the target lead segment.
The present embodiment further provides a device for identifying a power grid topological relation based on the foregoing method, including:
the data acquisition unit is used for acquiring coordinate data of all equipment in the power grid;
the longitude and latitude configuration unit is used for setting the starting point longitude and latitude and the end point longitude and latitude of each device according to the coordinate data of each device;
the topology construction unit is used for traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment, if the starting point longitude and latitude of the equipment B is the same as the end point longitude and latitude of the equipment A, the equipment B is subordinate sub-equipment of the equipment A, and the serial number of the equipment A is reserved as the index content of the equipment B, so that the topology relation and the index of all the equipment are obtained;
and the topological relation verification unit is used for acquiring the electric quantity of the target equipment as the power supply quantity, counting the electric quantity of all subordinate sub-equipment of the target equipment as the power selling quantity according to the topological relation, calculating the loss rate according to the power supply quantity and the power selling quantity, and if the loss rate is smaller than a preset value, determining that the topological relation of the target equipment and the subordinate sub-equipment is wrong.
In this embodiment, the latitude and longitude configuration unit is configured to perform the following steps:
if the current equipment only has one group of coordinate data, setting the starting point longitude and latitude and the end point longitude and latitude of the current equipment to be the longitude and latitude in the group of coordinate data;
if the current equipment has two or more groups of coordinate data, setting the starting point longitude and latitude of the current equipment as the longitude and latitude in the first group of coordinate data, and setting the finishing point longitude and latitude of the current equipment as the longitude and latitude in the last group of coordinate data.
The present embodiment also provides a computer system, which includes a computer programmed or configured to execute the foregoing grid topology relationship identification method based on geographic coordinates.
The present embodiment also proposes a computer-readable storage medium storing a computer program programmed or configured to execute the foregoing geographic coordinate-based grid topology relationship identification method.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. A grid topological relation identification method based on geographic coordinates is characterized by comprising the following steps:
s1) acquiring coordinate data of all equipment in a power grid;
s2) generating a starting point longitude and latitude and a finishing point longitude and latitude of each device according to the coordinate data of each device;
s3) traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment to obtain the topological relation and the index of all the equipment, and specifically comprising the following steps: and if the longitude and latitude of the starting point of the device B is the same as the longitude and latitude of the end point of the device A, the device B is a subordinate sub-device of the device A, and the serial number of the device A is reserved as the index content of the device B.
2. The geographic coordinate-based grid topology relationship identification method according to claim 1, wherein the step S2) comprises the following steps:
if the current equipment only has one group of coordinate data, setting the starting point longitude and latitude and the end point longitude and latitude of the current equipment to be the longitude and latitude in the group of coordinate data;
if the current equipment has two or more groups of coordinate data, setting the starting point longitude and latitude of the current equipment as the longitude and latitude in the first group of coordinate data, and setting the finishing point longitude and latitude of the current equipment as the longitude and latitude in the last group of coordinate data.
3. The geographic coordinate-based power grid topological relation identification method according to claim 1, wherein a topological relation verification step is further included after step S3), and specifically includes:
and acquiring the electric quantity of the target equipment as the power supply quantity, counting the electric quantities of all subordinate sub-equipment of the target equipment as the power selling quantity according to the topological relation, calculating the loss rate according to the power supply quantity and the power selling quantity, and if the loss rate is smaller than a preset value, determining that the topological relation of the target equipment and the subordinate sub-equipment is wrong.
4. The geographic coordinate-based grid topology relationship identification method according to claim 3, wherein the preset value is 0.
5. The geographic coordinate-based grid topology relationship identification method according to claim 3, wherein the loss rate is calculated by the following formula:
in the above equation, G is the power of the target device, X is the power of the kth subordinate sub-device of the target device, and n is the total number of subordinate sub-devices of the target device.
6. An apparatus for identifying a topological relation of a power grid, comprising:
the data acquisition unit is used for acquiring coordinate data of all equipment in the power grid;
the longitude and latitude configuration unit is used for setting the starting point longitude and latitude and the end point longitude and latitude of each device according to the coordinate data of each device;
and the topology construction unit is used for traversing the starting point longitude and latitude and the end point longitude and latitude of all the equipment, if the starting point longitude and latitude of the equipment B is the same as the end point longitude and latitude of the equipment A, the equipment B is a subordinate sub-equipment of the equipment A, and the serial number of the equipment A is reserved as the index content of the equipment B to obtain the topological relation and the index of all the equipment.
7. The grid topology relationship identification device of claim 6, wherein the latitude and longitude configuration unit is configured to perform the following steps:
if the current equipment only has one group of coordinate data, setting the starting point longitude and latitude and the end point longitude and latitude of the current equipment to be the longitude and latitude in the group of coordinate data;
if the current equipment has two or more groups of coordinate data, setting the starting point longitude and latitude of the current equipment as the longitude and latitude in the first group of coordinate data, and setting the finishing point longitude and latitude of the current equipment as the longitude and latitude in the last group of coordinate data.
8. The power grid topological relation recognition device of claim 6, further comprising a topological relation verification unit, configured to collect electric quantity of a target device as a power supply quantity, count electric quantities of all subordinate sub-devices of the target device as a power selling quantity according to the topological relation, calculate a loss rate according to the power supply quantity and the power selling quantity, and if the loss rate is smaller than a preset value, determine that the topological relation between the target device and the subordinate sub-devices is incorrect.
9. A computer system comprising a computer programmed or configured to perform the geographic coordinate-based grid topology relationship identification method of any of claims 1-5.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program programmed or configured to execute the geographic coordinate-based grid topology relationship identification method of any one of claims 1 to 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116528153A (en) * | 2023-07-05 | 2023-08-01 | 北京国科恒通科技股份有限公司 | Acquisition method, device and storage medium of power distribution network equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116528153A (en) * | 2023-07-05 | 2023-08-01 | 北京国科恒通科技股份有限公司 | Acquisition method, device and storage medium of power distribution network equipment |
| CN116528153B (en) * | 2023-07-05 | 2023-09-15 | 北京国科恒通科技股份有限公司 | Acquisition method, device and storage medium of power distribution network equipment |
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