CN111711191B - Distribution line network topology automatic reconstruction method - Google Patents
Distribution line network topology automatic reconstruction method Download PDFInfo
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- CN111711191B CN111711191B CN202010564920.1A CN202010564920A CN111711191B CN 111711191 B CN111711191 B CN 111711191B CN 202010564920 A CN202010564920 A CN 202010564920A CN 111711191 B CN111711191 B CN 111711191B
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- switch
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- electric quantity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
A distribution line network topology automatic reconstruction method specifically comprises the following steps: 1. according to the distribution structure of each line of the power distribution network, a network topological graph containing each line and a switch is constructed in a control host of a power distribution main station; 2. grading and numbering each line and switch of the network topological graph; 3. detecting the electric quantity of each switch of each line in real time and transmitting the electric quantity to the control host; 4. the method comprises the following steps that the switch position of a power distribution network line changes, a control host judges the abnormal electric quantity of a switch, and a change switch with a corresponding number is found in a network topological graph; 5. the control host automatically modifies and updates the changed switches in the network topology. The method is simple and quick, manual modification is not needed, great convenience is provided for management and control of the distribution line network topology, and meanwhile the intelligent level is improved.
Description
Technical Field
The invention relates to the technical field of distribution network automation, in particular to a distribution line network topology automatic reconstruction method.
Background
With the increasing demand of electric power, the requirements of users on the quality and reliability of power supply are higher and higher, which puts higher requirements on the automation of the power distribution network. The topology analysis of the power distribution network is that the whole power distribution network is viewed as a topological graph with combination of lines and points according to the connection relation of power distribution electrical elements, and then the topological connection analysis of the whole network is carried out according to power supply nodes, switch nodes and the like, which is the basis of other analyses of the power distribution network, such as state estimation, load flow calculation, fault positioning, isolation, power supply recovery and the like.
The structure of the distribution network is large and complex, and the network structure is often changed due to a fault or opening and closing of a switch in a load transfer operation. In the existing distributed topology control method, a plurality of topology control units are adopted to query and acquire topology information step by step, the method needs to configure the topology information of the terminal and the topology information of the adjacent terminal, and once the adjacent terminal is switched or the branch information and the switch information of the adjacent terminal are greatly changed, the topology information needs to be manually reconfigured. The method is not only complicated, but also has low efficiency, which is not in accordance with the characteristics of flexible and changeable operation modes of the power distribution network and frequent equipment change. Therefore, the distribution line network topology automatic reconstruction method is provided.
Disclosure of Invention
The invention provides a distribution line network topology automatic reconstruction method, which aims to solve the defects that when the switch connection information of the existing distribution line is changed, the corresponding distribution line network topology information in a distribution master station needs to be manually reconfigured, the operation is complicated, the efficiency is low and the like.
The invention adopts the following technical scheme:
a distribution line network topology automatic reconstruction method specifically comprises the following steps:
s1, constructing a network topological graph containing each line and a switch in a control host of the power distribution main station according to the distribution structure of each line of the power distribution network;
step S2, grading and numbering each circuit and switch of the network topological graph;
step S3, detecting the electric quantity of each switch of each circuit in real time and transmitting the electric quantity to the control host;
step S4, the switch position of the power distribution network line changes, the control host judges the abnormal electric quantity of the switch, and the change switch with the corresponding number is found in the network topological graph;
and step S5, the control host automatically modifies and updates the changed switches in the network topology map.
Further, the control host stores therein an average value of the electric power of each switch that normally operates within the time period T.
Further, the time period T is several hours, several days, several weeks or several months.
Further, in step S4, the method for the control host to determine the abnormal electric quantity of the switch is as follows: and comparing each switch electric quantity detected in real time with the corresponding electric quantity average value stored in the switch electric quantity, and judging that the electric quantity is abnormal when the electric quantity difference value exceeds a certain range.
Furthermore, if the switch electric quantity of a plurality of continuous levels in the line A is reduced, the reduction value is basically the same as the switch electric quantity of a certain number of the lower level of the last level of the plurality of continuous levelsAverage value Q 0 Then the number switch is judged to be disconnected.
Further, if the switch electric quantity of the plurality of levels connected in the line B is increased and is increased to be basically consistent with the reduced value in the line A, the switch disconnected in the line A is judged to be connected into the line connected with the plurality of levels of switches in the line B.
Further, in step S2, the classification process of each line switch is as follows: in a power distribution network extending from a transformer substation to a user side, one or a plurality of parallel switches closest to one end of the transformer substation are primary switches, one or a plurality of parallel branch switches directly led out from each switch of the primary switches are secondary switches, one or a plurality of parallel branch vacuum circuit breakers directly led out from each switch of the secondary switches are tertiary switches, and the rest is done in turn.
From the above description of the method of the present invention, it can be seen that the present invention has the following advantages over the prior art: the method for automatically reconstructing the network topology of the power distribution line detects the electric quantity of each switch in real time and transmits the electric quantity to the control host of the power distribution main station, when the connection and load transfer switching occurs and the switch position of the power distribution network line changes, the control host judges the electric quantity to be abnormal, a change switch with a corresponding number and a lower switch of the change switch are found in the network topology map, and finally the control host automatically modifies and updates the change switch in the network topology map to complete automatic reconstruction. The method is simple and quick, manual modification is not needed, and great convenience is provided for management and control of the distribution line network topology.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is an initial network topology diagram of an embodiment of the invention.
Fig. 3 is a network topology diagram after reconstruction according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details.
A distribution line network topology automatic reconstruction method, referring to FIG. 1, specifically includes the following steps:
(1) and constructing a network topological graph comprising all lines and switches in a control host of the power distribution main station according to the distribution structure of all lines of the power distribution network.
(2) And grading and numbering each line and each switch of the network topological graph.
(3) And detecting the electric quantity of each switch of each line in real time and transmitting the electric quantity to the control host.
(4) And the switch position of the power distribution network line changes, the control host judges the abnormal electric quantity of the switch, and the change switch with the corresponding number is found out in the network topological graph.
(5) And the control host automatically modifies and updates the changed switches in the network topological graph.
The control host stores the average value of the electric quantity of each switch which normally works in a time period T, wherein the time period T is a plurality of hours, a plurality of days, a plurality of weeks or a plurality of months.
In the step (2), the classification process of each line switch is as follows: in a power distribution network extending from a transformer substation to a user side, one or a plurality of parallel switches closest to one end of the transformer substation are primary switches, one or a plurality of parallel branch switches directly led out from each switch of the primary switches are secondary switches, one or a plurality of parallel branch vacuum circuit breakers directly led out from each switch of the secondary switches are tertiary switches, and the rest is done in sequence.
In the step (4), the method for controlling the host to judge the abnormal electric quantity of the switch is as follows: and comparing each switch electric quantity detected in real time with the corresponding electric quantity average value stored in the switch electric quantity, and judging that the electric quantity is abnormal when the electric quantity difference value exceeds a certain range.
The following are specific examples of the practice of the invention.
The network topology diagram constructed in the control host of the power distribution main station comprises a line A and a line B, wherein the line A comprises four levels of switches, the first level of switches comprise A11, the second level of switches comprise two switches A21 and A22 which are connected in parallel, and A21 and A22 are respectively connected with A11 in series; the third-level switch comprises three switches A31, A32 and A33 which are connected in parallel, wherein A31, A32 and A33 are respectively connected with A21 in series; the fourth-level switch comprises four switches A41, A42, A43 and A44 which are connected in parallel, wherein A41, A42, A43 and A44 are respectively connected with A33 in series.
The line B comprises four levels of switches, the first level of switches comprises B11, the second level of switches comprises two switches B21 and B22 which are connected in parallel, and B21 and B22 are respectively connected with B11 in series; the third-level switch comprises three switches B31, B32 and B33 which are connected in parallel, and B31, B32 and B33 are respectively connected with B22 in series; the fourth-level switch comprises two switches B41 and B42 which are connected in parallel, and B41 and B42 are respectively connected with B33 in series.
When the fact that the electric quantity of the A33 is basically kept unchanged is detected, the electric quantities of the upper switches A21 and A11 which are connected with the A33 are correspondingly reduced, and the reduction value is basically the same as the average value of the A33 in the time period T, the switch A33 is judged to carry out load transfer. After a while, the electric quantities in the lines B, B33, B22 and B11 all increase correspondingly, and increase to be basically the same as the average value of the line a33 in the time period T, and then it is determined that the line a33 is connected to the line B and is connected with the line B33 in series. After reconstruction, a33 and its lower-stage line switch are reconstructed and added to the line B, and reconstructed and deleted in the line a.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (6)
1. A distribution line network topology automatic reconstruction method is characterized by comprising the following steps:
s1, constructing a network topological graph containing each line and a switch in a control host of the power distribution main station according to the distribution structure of each line of the power distribution network;
step S2, grading and numbering each circuit and switch of the network topological graph;
step S3, detecting the electric quantity of each switch of each circuit in real time and transmitting the electric quantity to the control host;
step S4, the switch position of the power distribution network line changes, the control host judges the abnormal electric quantity of the switch, and the change switch with the corresponding number is found in the network topological graph; the method for judging the abnormal electric quantity of the switch by the control host comprises the following steps: comparing each switch electric quantity detected in real time with a corresponding electric quantity average value stored in the switch electric quantity, and judging that the electric quantity is abnormal when the electric quantity difference value exceeds a certain range;
and step S5, the control host automatically modifies and updates the changed switches in the network topology map.
2. The distribution line network topology automatic reconstruction method according to claim 1, characterized in that: the control host stores the average value of the electric quantity of each switch which normally works in a time period T.
3. The method for automatically reconstructing the topology of a distribution line network according to claim 2, wherein: the time period T is several hours, days, weeks or months.
4. The method of claim 3, wherein the method comprises the following steps: and if the switch electric quantity of the continuous levels in the line A is reduced, the reduction value is basically the same and is equal to the average value of the switch electric quantity of a certain number of the next level of the last level in the continuous levels, the number switch is judged to be disconnected.
5. The method of claim 4, wherein the method comprises the following steps: and if the switch electric quantity is increased when a plurality of levels are connected in the line B, and the increase value is basically consistent with the decrease value in the line A, judging that the switch disconnected from the line A is connected into the line connected with the switches of the plurality of levels in the line B.
6. The method for automatically reconstructing the topology of a distribution line network as recited in claim 1, wherein: in step S2, the classification procedure of each line switch is as follows: in a power distribution network extending from a transformer substation to a user side, one or a plurality of parallel switches closest to one end of the transformer substation are primary switches, one or a plurality of parallel branch switches directly led out from each switch of the primary switches are secondary switches, one or a plurality of parallel branch vacuum circuit breakers directly led out from each switch of the secondary switches are tertiary switches, and the rest is done in sequence.
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| CN202010564920.1A CN111711191B (en) | 2020-06-19 | 2020-06-19 | Distribution line network topology automatic reconstruction method |
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| CN202010564920.1A CN111711191B (en) | 2020-06-19 | 2020-06-19 | Distribution line network topology automatic reconstruction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763034A (en) * | 2009-12-01 | 2010-06-30 | 深圳市科陆电子科技股份有限公司 | Method for realizing self-adapting network reconfiguration at distribution network terminal |
| CN205566655U (en) * | 2016-02-23 | 2016-09-07 | 苏州新海宜电子技术有限公司 | Data link terminal with quick automatic reconsitution route topology function |
| CN107394897A (en) * | 2017-08-21 | 2017-11-24 | 国网山东省电力公司济南供电公司 | A kind of power distribution network intelligence self-healing method and system based on topological diagram |
| CN107872058A (en) * | 2017-11-22 | 2018-04-03 | 深圳供电局有限公司 | A kind of distribution integration protection method for merging circuit self-healing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280894B (en) * | 2013-06-14 | 2015-03-25 | 山东理工大学 | Power distribution network control application network topology automatic identifying method |
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- 2020-06-19 CN CN202010564920.1A patent/CN111711191B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763034A (en) * | 2009-12-01 | 2010-06-30 | 深圳市科陆电子科技股份有限公司 | Method for realizing self-adapting network reconfiguration at distribution network terminal |
| CN205566655U (en) * | 2016-02-23 | 2016-09-07 | 苏州新海宜电子技术有限公司 | Data link terminal with quick automatic reconsitution route topology function |
| CN107394897A (en) * | 2017-08-21 | 2017-11-24 | 国网山东省电力公司济南供电公司 | A kind of power distribution network intelligence self-healing method and system based on topological diagram |
| CN107872058A (en) * | 2017-11-22 | 2018-04-03 | 深圳供电局有限公司 | A kind of distribution integration protection method for merging circuit self-healing |
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