CN111366801A - Method for identifying topology of switch in transformer area - Google Patents
Method for identifying topology of switch in transformer area Download PDFInfo
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- CN111366801A CN111366801A CN202010211211.5A CN202010211211A CN111366801A CN 111366801 A CN111366801 A CN 111366801A CN 202010211211 A CN202010211211 A CN 202010211211A CN 111366801 A CN111366801 A CN 111366801A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
Abstract
The invention provides a platform area switch topology identification method, which comprises a platform transformer, wherein the platform transformer is provided with a large-capacity switch, a first-stage branch box is connected below the switch, the first-stage branch box comprises 1 isolating switch and 1-6 branch switches, each first-stage branch switch is generally connected below a second-stage branch box, each branch box of the second-stage branch box comprises 1 isolating switch and 1-4 branch switches, and the three-phase or single-phase of each branch switch is connected into a meter box, and the method comprises the following steps: firstly, clock synchronization; step two, data acquisition; step three, data arrangement; step four, topology drawing; and step five, topology verification. Compared with the scheme of generating the disturbing signal in the market, the technical scheme of the invention has the advantages of low power consumption, no risk of equipment burnout caused by untimely heat dissipation, low scheme cost, no injection of harmonic waves into the power grid and no subsequent interference to the equipment of the power grid by adopting the data carried by the equipment for analysis.
Description
Technical Field
The invention relates to the technical field of monitoring of electric power low-voltage distribution networks, in particular to a method for identifying a switch topology of a transformer area.
Background
The purpose of low-voltage distribution network monitoring is to improve the reliability and quality of power supply, shorten the time for handling accidents, reduce the power failure range, improve the economic type of the operation of a low-voltage distribution network system, reduce the operation and maintenance cost, reduce the line loss, provide the economic benefit of a power supply enterprise to the maximum extent, improve the management level and the working efficiency of the whole low-voltage distribution network automatic system, and improve the service level of the power supply enterprise, in the distribution network monitoring, the switch topology identification is a technical problem which must be solved, otherwise, the active operation and maintenance can only stay in a port number and cannot be implemented, in the existing numerous switch identification technologies, most manufacturers adopt a scheme (disturbance) which generates large current near a zero crossing point, the heat generated by continuous disturbance signals cannot be dissipated, and the risk of burning the equipment exists, so that the scheme can only be used in a small-range test point and cannot be really popularized, in addition, the high-speed DSP is adopted for current sampling, so that the equipment price is high.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a method for identifying the topology of a platform area switch.
The invention is realized by the following technical scheme: the utility model provides a platform district switch topology identification method, includes the platform and becomes, and the platform becomes to have a switch of large capacity, and the switch is connected with one-level feeder pillar down, contains 1 isolator and 1~6 branch switch in the one-level feeder pillar, and the second grade feeder pillar is generally connected to every one-level branch switch down, and every feeder pillar of second grade feeder pillar contains 1 isolator and 1~4 branch switch, and branch switch's three-phase or single-phase access table case, its characterized in that includes following step:
step one, clock synchronization: after CCO networking is finished, a clock is immediately requested from the concentrator, and the clock is started to run;
step two, data acquisition: the CCO starts and collects the data in a proxy broadcasting mode;
step three, data arrangement: deleting mutation data from the acquired data, then calculating an average value, throwing away the data if the data has more than 3 mutation points, and acquiring again;
step four, topology drawing: comparing the opposite ends of the three queues, and checking whether the addresses of the current and the signal-to-noise ratio are consistent;
step five, topology verification: and repeating the above acquisition, data arrangement and topology drawing, and then carrying out AND on the scheme to obtain an answer.
Preferably, the step one comprises the following steps: after CCO networking is finished, a clock is immediately requested from the concentrator, and the clock is started to run; and calling the clocks of the STAs, if the clock error of a certain STA is more than 5 seconds, broadcasting timing is carried out again, and then calling is carried out again until all timing succeeds.
Preferably, the second step comprises the following steps: after the CCO starts the acquisition STA to receive the broadcast acquisition command in a proxy broadcast mode, acquiring and storing voltage, current and signal-to-noise ratio (the central beacon frame of the CCO is received), and storing the voltage and the current according to the frequency of 5S intervals, wherein the signal-to-noise ratio is stored for 5 times; and the CCO performs data acquisition in a unicast mode, performs complete verification on the data, and restarts acquisition if some modules do not perform storage. And then unicast meter reading is carried out.
Preferably, the third step comprises the following steps: deleting mutation data from the acquired data, then calculating an average value, throwing out the data if the data has more than 3 mutation points, and acquiring the data again (acquiring relatively stable instantaneous data about 1 minute); and sequencing the voltage, the current and the signal-to-noise ratio from large to small.
Preferably, the step four comprises the following steps: comparing the opposite ends of the three queues, checking whether the addresses of the current and the signal-to-noise ratio are consistent, if so, fixing that the point is a switch 1 of a distribution transformer area and marked as Level 1; switch 3, which is the next largest in current, is labeled Level 2; finding the point 4,6 of the secondary no-load is marked as 2 (current is 0, Level1> SNR > Level2 all points, voltage = Level 1); finding the point with Level1> SNR > Level2 and the current is not 0, excluding 9, 10, 11, selecting the highest SNR from the rest, excluding 13, 14, 15 if 5, further selecting the highest SNR from the rest, excluding 17, 18, 19, selecting the point with Level2, and so on, and selecting other points with Level 2. Until the node current equals the sum of all selected secondary node currents. Excluding points with SNR less than node 3, layering the points possibly belonging to node 3 into a group, and then performing scheme arrangement; excluding points with SNR less than node 5, dividing the points possibly belonging to 5 into a group, and then carrying out scheme arrangement; excluding points with SNR less than level 7, dividing the points possibly belonging to level 7 into a group, and then carrying out scheme arrangement; traversing the schemes 5 and 7 belonging to the scheme 3, and searching one or more schemes without union; and (4) selecting a scheme of 3 levels, and selecting the scheme by performing scheme elimination on SNR and voltage.
Preferably, the step five comprises the following steps: repeating the above acquisition, data arrangement and topology drawing, and then carrying out AND on the scheme to obtain an answer; issuing the acquired data, and after the acquisition is finished, checking the topology through the current; if they are consistent, the recognition is ended, and if they are different, the recognition is started from the beginning.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects: 1. compared with the scheme of sending disturbing signals in the market, the power consumption is low, and the risk of burning the equipment due to untimely heat dissipation is avoided. 2. Compared with a scheme of sending a disturbing signal in the market, the scheme has low cost by adopting data carried by the equipment to analyze. 3. Compared with the scheme of generating the disturbance signal on the market, no harmonic wave is injected into the power grid, and no subsequent interference is caused to equipment of the power grid.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a topology identification diagram of the present invention;
FIG. 2 is a schematic flow chart of step one;
FIG. 3 is a schematic flow chart of step two;
FIG. 4 is a schematic flow chart of step three;
FIG. 5 is a schematic flow chart of step four;
fig. 6 is a schematic flow chart of step five.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The method for identifying a topology of a zone switch according to an embodiment of the present invention is specifically described below with reference to fig. 1 to 6.
As shown in fig. 1 to 6, the invention provides a platform area switch topology identification method, which includes a platform transformer, wherein the platform transformer has a large-capacity switch, a first-stage branch box is connected below the switch, the first-stage branch box contains 1 isolating switch and 1 to 6 branch switches, each first-stage branch switch is generally connected below a second-stage branch box, each branch box of the second-stage branch box contains 1 isolating switch and 1 to 4 branch switches, and the three-phase or single-phase of each branch switch is connected into a meter box, and is characterized by including the following steps:
step one, clock synchronization: after CCO networking is finished, a clock is immediately requested from the concentrator, and the clock is started to run; the clock timing is carried out on the STAs at the switch positions of the whole network through the HPLC module broadcast timing messages, and the time timing success rate is high because the switch scales are generally 15-30. And calling the clocks of the STAs, if the clock error of a certain STA is more than 5 seconds, broadcasting timing is carried out again, and then calling is carried out again until all timing succeeds.
Step two, data acquisition: after the CCO starts the acquisition STA to receive the broadcast acquisition command in a proxy broadcast mode, acquiring and storing voltage, current and signal-to-noise ratio (the central beacon frame of the CCO is received), and storing the voltage and the current according to the frequency of 5S intervals, wherein the signal-to-noise ratio is stored for 5 times; and the CCO performs data acquisition in a unicast mode, performs complete verification on the data, and restarts acquisition if some modules do not perform storage. And then unicast meter reading is carried out.
Step three, data arrangement: deleting mutation data from the acquired data, then calculating an average value, throwing out the data if the data has more than 3 mutation points, and acquiring the data again (acquiring relatively stable instantaneous data about 1 minute); and sequencing the voltage, the current and the signal-to-noise ratio from large to small.
Step four, topology drawing: comparing the opposite ends of the three queues, checking whether the addresses of the current and the signal-to-noise ratio are consistent, if so, fixing that the point is a switch 1 of a distribution transformer area and marked as Level 1; switch 3, which is the next largest in current, is labeled Level 2; finding the point 4,6 of the secondary no-load is marked as 2 (current is 0, Level1> SNR > Level2 all points, voltage = Level 1); finding the point with Level1> SNR > Level2 and the current is not 0, excluding 9, 10, 11, selecting the highest SNR from the rest, excluding 13, 14, 15 if 5, further selecting the highest SNR from the rest, excluding 17, 18, 19, selecting the point with Level2, and so on, and selecting other points with Level 2. Until the node current equals the sum of all selected secondary node currents. Excluding points with SNR less than node 3, layering the points possibly belonging to node 3 into a group, and then performing scheme arrangement; excluding points with SNR less than node 5, dividing the points possibly belonging to 5 into a group, and then carrying out scheme arrangement; excluding points with SNR less than level 7, dividing the points possibly belonging to level 7 into a group, and then carrying out scheme arrangement; traversing the schemes 5 and 7 belonging to the scheme 3, and searching one or more schemes without union; and (4) selecting a scheme of 3 levels, and selecting the scheme by performing scheme elimination on SNR and voltage.
Step five, topology verification: repeating the above acquisition, data arrangement and topology drawing, and then carrying out AND on the scheme to obtain an answer; issuing the acquired data, and after the acquisition is finished, checking the topology through the current; if they are consistent, the recognition is ended, and if they are different, the recognition is started from the beginning.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a platform district switch topology identification method, includes the platform and becomes, and the platform becomes to have a switch of large capacity, and the switch is connected with one-level feeder pillar down, contains 1 isolator and 1~6 branch switch in the one-level feeder pillar, and the second grade feeder pillar is generally connected to every one-level branch switch down, and every feeder pillar of second grade feeder pillar contains 1 isolator and 1~4 branch switch, and branch switch's three-phase or single-phase access table case, its characterized in that includes following step:
step one, clock synchronization: after CCO networking is finished, a clock is immediately requested from the concentrator, and the clock is started to run;
step two, data acquisition: the CCO starts and collects the data in a proxy broadcasting mode;
step three, data arrangement: deleting mutation data from the acquired data, then calculating an average value, throwing away the data if the data has more than 3 mutation points, and acquiring again;
step four, topology drawing: comparing the opposite ends of the three queues, and checking whether the addresses of the current and the signal-to-noise ratio are consistent;
step five, topology verification: and repeating the above acquisition, data arrangement and topology drawing, and then carrying out AND on the scheme to obtain an answer.
2. The method for identifying the topology of the cell switch as recited in claim 1, wherein the first step comprises the steps of: after CCO networking is finished, a clock is immediately requested from the concentrator, and the clock is started to run; and calling the clocks of the STAs, if the clock error of a certain STA is more than 5 seconds, broadcasting timing is carried out again, and then calling is carried out again until all timing succeeds.
3. The method for identifying the topology of the cell switch according to claim 1, wherein the second step comprises the following steps: after the CCO starts the acquisition STA to receive the broadcast acquisition command in a proxy broadcast mode, acquiring and storing voltage, current and signal-to-noise ratio (the central beacon frame of the CCO is received), and storing the voltage and the current according to the frequency of 5S intervals, wherein the signal-to-noise ratio is stored for 5 times; the CCO performs data acquisition in a unicast mode, performs complete verification on the data, and restarts acquisition if individual modules do not perform storage; and then unicast meter reading is carried out.
4. The method for identifying the topology of the platform switch according to claim 1, wherein the third step comprises the following steps: deleting mutation data from the acquired data, then calculating an average value, throwing out the data if the data has more than 3 mutation points, and acquiring the data again (acquiring relatively stable instantaneous data about 1 minute); and sequencing the voltage, the current and the signal-to-noise ratio from large to small.
5. The method for identifying a topology of a platform switch according to claim 1, wherein said step four comprises the steps of: comparing the opposite ends of the three queues, checking whether the addresses of the current and the signal-to-noise ratio are consistent, if so, fixing that the point is a switch 1 of a distribution transformer area and marked as Level 1; switch 3, which is the next largest in current, is labeled Level 2; finding the point 4,6 of the secondary no-load is marked as 2 (current is 0, Level1> SNR > Level2 all points, voltage = Level 1); searching for a point with Level1> SNR > Level2 and the current not being 0, excluding 9, 10 and 11, selecting the point with the highest signal-to-noise ratio from the rest, excluding 13, 14 and 15 if the signal-to-noise ratio is 5, further selecting the point with the highest signal-to-noise ratio from the rest, excluding 17, 18 and 19, selecting a point with the Level2, and repeating the steps until the node current is equal to the sum of all the selected secondary node currents; excluding points with SNR less than node 3, layering the points possibly belonging to node 3 into a group, and then performing scheme arrangement; excluding points with SNR less than node 5, dividing the points possibly belonging to 5 into a group, and then carrying out scheme arrangement; excluding points with SNR less than level 7, dividing the points possibly belonging to level 7 into a group, and then carrying out scheme arrangement; traversing the schemes 5 and 7 belonging to the scheme 3, and searching one or more schemes without union; and (4) selecting a scheme of 3 levels, and selecting the scheme by performing scheme elimination on SNR and voltage.
6. The method for identifying a topology of a platform switch according to claim 1, wherein said step five comprises the steps of: repeating the above acquisition, data arrangement and topology drawing, and then carrying out AND on the scheme to obtain an answer; issuing the acquired data, and after the acquisition is finished, checking the topology through the current; if they are consistent, the recognition is ended, and if they are different, the recognition is started from the beginning.
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| CN112615375A (en) * | 2020-12-24 | 2021-04-06 | 华南理工大学 | Low-voltage transformer area multi-level branch line user identification method integrated with intelligent switch |
| CN112787402A (en) * | 2021-01-21 | 2021-05-11 | 中电华瑞技术有限公司 | Transformer area switch physical topology identification method based on power grid full data acquisition |
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