CN111371078A - On-site feeder automation method based on full circuit breaker - Google Patents
On-site feeder automation method based on full circuit breaker Download PDFInfo
- Publication number
- CN111371078A CN111371078A CN202010280893.5A CN202010280893A CN111371078A CN 111371078 A CN111371078 A CN 111371078A CN 202010280893 A CN202010280893 A CN 202010280893A CN 111371078 A CN111371078 A CN 111371078A
- Authority
- CN
- China
- Prior art keywords
- fault
- protection
- feeder automation
- feeder
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a full-breaker-based in-situ feeder automation method, which comprises the following specific processes: the feeder switch integrates the protection and automation logic functions into a whole, and the in-station outgoing line switch is not required to participate in protection action and reclosing in the whole feeder automation process; when a line has a fault, the fault upstream switch simultaneously detects a fault signal and starts a protection action, and because a plurality of switches have protection functions, when a single switch has a fault or fails to operate, the fault can still be normally removed, so that the protection override action or the line equipment damage cannot be caused; the in-situ feeder automation based on a full breaker mode realizes three-level protection of a station, a trunk and branches by matching a protection constant value with a time level difference; near backup and far backup protection is realized among the feeder switches and the switches in the station. Compared with the existing feeder automation method, the method has the advantages of good safety, high reliability, small power failure range and high power restoration speed.
Description
Technical Field
The invention belongs to the field of distribution automation of 10kV distribution lines, and particularly relates to an on-site feeder automation method based on a full circuit breaker.
Background
The in-situ feeder automation means that when a distribution line has a fault, line fault positioning, isolation and non-fault area recovery power supply are realized by using reclosing through logic cooperation between line switches. The local feeder automation does not depend on a main station and communication, and the feeder automation is realized by completely depending on line switch equipment, so that the local feeder automation is particularly suitable for vast rural lines.
However, in the existing feeder automation mode, whether it is a voltage-time type (as shown in fig. 6), a current-count type or a voltage-current-time type, when a line fails, the whole feeder automation process is divided into two independent parts: firstly, protection action and reclosing of an outlet switch in a station; and secondly, automatic logics of 'non-voltage switching-off, incoming call delay switching-on' and the like of the feeder switch.
These in-place feeder automation modes are logically simple but suffer from the following problems:
1. when a line fails, the protection action is performed in the station, the power failure range is full line power failure, and the power failure range is large.
2. Once the in-station outgoing switch refuses to operate, the protection override action or the damage of line equipment can be caused, and the safety is low.
3. Once a switch fault occurs in the station, the feeder automation logic of the feeder switch cannot normally operate, and the reliability is poor.
4. In the feeder automation process, switches are all superposed from switches in the station to superior switches in a fault section, so that the number of action switches is large, and the power restoration time is long.
Disclosure of Invention
The invention provides a feeder switch which integrates protection and automatic logic functions into a whole in order to solve the defects and shortcomings in the prior art, an in-situ feeder automation mode based on a full breaker mode, which has the advantages of good safety, high reliability, small power failure range, high power restoration speed and high safety, does not need an in-station outlet switch to participate in protection action and reclosing in the whole feeder automation process,
the technical scheme of the invention is as follows: an on-site feeder automation method based on a full breaker comprises the following specific processes:
1) the feeder switch integrates the protection and automation logic functions into a whole, and the in-station outgoing line switch is not required to participate in protection action and reclosing in the whole feeder automation process;
2) when a line has a fault, the fault upstream switch simultaneously detects a fault signal and starts a protection action, and because a plurality of switches have protection functions, when a single switch has a fault or fails to operate, the fault can still be normally removed, so that the protection override action or the line equipment damage cannot be caused;
3) the in-situ feeder automation based on a full breaker mode realizes three-level protection of a station, a trunk and branches by matching a protection constant value with a time level difference;
4) near backup and far backup protection is realized among the feeder switches and the switches in the station.
Furthermore, when a single switch fails or fails, the fault removal is normal, the whole feeder automation process is normally finished, and at most, the fault power failure range is expanded.
Further, when a fault is not detected due to reasons such as wrong setting of a fixed value of a single switch and the like, the fault is normally removed, the whole feeder automation process is normally completed, and at most, the fault power failure range is expanded.
Furthermore, the fault matched with the level difference is realized, the fault area is cut off nearby through direct protection action, and the fault isolation positioning and the quick self-healing in the minimum range are realized.
Furthermore, for short-circuit faults, most branch faults can be directly isolated and removed in the branches; for the earth fault, all the switches can be cut off nearby by matching with the time step difference at the upstream of the fault point, and the section at the upstream of the fault point is not powered off.
Furthermore, the fault matched with the level difference cannot be realized, the selectivity of protection tripping is corrected through feeder automation, and fault isolation positioning and quick self-healing are realized.
Compared with the existing feeder automation method, the feeder switch integrates the protection and automation logic functions into a whole, the in-station outgoing line switch is not required to participate in protection action and reclosing in the whole feeder automation process, and the feeder automation method has the advantages of good safety, high reliability, small power failure range and high power restoration speed.
Drawings
FIG. 1 is a schematic diagram of the switch protection operation of the present invention;
FIG. 2 is a schematic diagram of a selectively protected feeder automation process of the present invention;
FIG. 3 is a schematic diagram of a feeder automation process when the in-station switch is not in protection operation according to the present invention;
FIG. 4 is a schematic diagram of the protection operation of the present invention when a single switch fails or fails;
FIG. 5 is a diagram of the results of feeder automation processing when a single switch does not detect a fault in the present invention;
fig. 6 is a schematic diagram of an automated process of voltage-time feeder in the background art of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, but the present invention is not limited thereto.
As shown in fig. 1, in an in-situ feeder automation mode based on a full breaker mode, a feeder switch integrates protection and automation logic functions, and an in-station outgoing line switch is not required to participate in protection action and reclosing in the whole feeder automation process.
When a line fails, the failure upstream switch simultaneously detects a failure signal and initiates a protective action. Because a plurality of switches have protection functions, when a single switch (including an in-station outgoing switch) fails or fails to operate, the fault can still be normally removed, and protection override action or circuit equipment damage cannot be caused.
Through the cooperation of the protection constant value and the time level difference, the in-situ feeder automation based on the full breaker mode can realize the three-level protection of the in-station, the trunk and the branches. Near backup and far backup protection is realized among the feeder switches and the switches in the station.
As shown in fig. 2, the fault with the matching level difference can be directly protected to remove the fault area nearby, and the fault isolation positioning and the rapid self-healing within the minimum range are realized.
As shown in fig. 3, a fault which cannot realize level difference coordination can be corrected through feeder automation to protect the selectivity of tripping, and fault isolation positioning and quick self-healing are realized.
Compared with the existing feeder automation mode, the invention has the following advantages:
1. good in safety
When a single switch (including an in-station outgoing line switch) has a fault or fails to operate, the fault can still be normally removed, and the protection override action or the damage of line equipment cannot be caused.
Near backup and far backup protection is realized among the feeder switches and the switches in the station.
2. High reliability
As shown in fig. 4, when a single switch (including the in-station outgoing line switch) fails or fails, the automatic switch is not provided for the line, but the fault is normally cut off, and the whole feeder automation process is normally completed, which at most just causes the fault power failure range to be enlarged.
As shown in fig. 5, when a fault is not detected due to a fixed value setting error of a single switch (including an in-station outgoing switch), similar to a case where a single switch fails or fails, the fault is normally removed, and the whole feeder automation process is normally completed, which at most only causes an expansion of a fault power outage range.
3. Small power cut range
The fault matched with the level difference can be directly protected to act to remove a fault area, and the fault isolation positioning and the quick self-healing within the minimum range are realized. For short-circuit faults, most branch faults can be directly isolated and removed at the branches; for the earth fault, all the switches can be cut off nearby by matching with the time step difference at the upstream of the fault point, and the section at the upstream of the fault point is not powered off.
4. The speed of the electricity recovery is high
The fault matched with the level difference can be directly protected to remove a fault area nearby, the switching action frequency is obviously reduced, and the power recovery speed is accelerated.
Claims (6)
1. An in-situ feeder automation method based on a full circuit breaker is characterized in that: the specific process is as follows:
1) the feeder switch integrates the protection and automation logic functions into a whole, and the in-station outgoing line switch is not required to participate in protection action and reclosing in the whole feeder automation process;
2) when a line has a fault, the fault upstream switch simultaneously detects a fault signal and starts a protection action, and because a plurality of switches have protection functions, when a single switch has a fault or fails to operate, the fault can still be normally removed, so that the protection override action or the line equipment damage cannot be caused;
3) the in-situ feeder automation based on a full breaker mode realizes three-level protection of a station, a trunk and branches by matching a protection constant value with a time level difference;
4) near backup and far backup protection is realized among the feeder switches and the switches in the station.
2. The full breaker-based in-place feeder automation method of claim 1, further comprising: when a single switch fails or fails, the automatic switch is not arranged on the line, but the fault is normally removed, the whole feeder automation process is normally finished, and at most, the fault power failure range is expanded.
3. The full breaker-based in-place feeder automation method of claim 1, further comprising: when the single switch fails to detect due to reasons such as wrong setting of a fixed value and the like, the fault is normally removed similar to the situation that the single switch fails or fails to operate, the whole feeder automation process is normally finished, and at most, the fault power failure range is expanded.
4. The full breaker-based in-place feeder automation method of claim 1, further comprising: the fault matched with the level difference is realized, the fault area is cut off nearby through direct protection action, and the fault isolation positioning and the quick self-healing within the minimum range are realized.
5. The full breaker-based in-place feeder automation method of claim 4, further comprising: for short-circuit faults, most branch faults can be directly isolated and removed at the branches; for the earth fault, all the switches can be cut off nearby by matching with the time step difference at the upstream of the fault point, and the section at the upstream of the fault point is not powered off.
6. The full breaker-based in-place feeder automation method of claim 1, further comprising: the fault matched with the level difference can not be realized, the selectivity of protection tripping is corrected through feeder automation, and fault isolation positioning and quick self-healing are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280893.5A CN111371078A (en) | 2020-04-10 | 2020-04-10 | On-site feeder automation method based on full circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280893.5A CN111371078A (en) | 2020-04-10 | 2020-04-10 | On-site feeder automation method based on full circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111371078A true CN111371078A (en) | 2020-07-03 |
Family
ID=71210803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010280893.5A Pending CN111371078A (en) | 2020-04-10 | 2020-04-10 | On-site feeder automation method based on full circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111371078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115859547A (en) * | 2023-02-27 | 2023-03-28 | 国网江西省电力有限公司电力科学研究院 | Automatic generating system and method for distribution line fixed value scheme |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973899A (en) * | 1998-09-10 | 1999-10-26 | Pacificorp | Automated power feeder restoration system and method |
| CN108666991A (en) * | 2018-06-19 | 2018-10-16 | 西安兴汇电力科技有限公司 | A kind of no-delay Graded coordination method of feeder automation intelligent on the spot and application |
-
2020
- 2020-04-10 CN CN202010280893.5A patent/CN111371078A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973899A (en) * | 1998-09-10 | 1999-10-26 | Pacificorp | Automated power feeder restoration system and method |
| CN108666991A (en) * | 2018-06-19 | 2018-10-16 | 西安兴汇电力科技有限公司 | A kind of no-delay Graded coordination method of feeder automation intelligent on the spot and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115859547A (en) * | 2023-02-27 | 2023-03-28 | 国网江西省电力有限公司电力科学研究院 | Automatic generating system and method for distribution line fixed value scheme |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110148930B (en) | Method for fault location and automatic topology identification in power distribution network | |
| CN109245101B (en) | Method for improving power supply reliability of series-supply transformer substation | |
| CN111082423B (en) | Rapid self-healing method for power distribution network | |
| CN113258545B (en) | In-situ feeder automation method and system based on multi-stage time step difference protection | |
| CN111525525B (en) | Method and equipment for recovering power supply of downstream non-fault section with ground fault | |
| CN109245072B (en) | Self-adaptive in-situ feeder automation fault processing method based on regional sequence number | |
| CN112310948B (en) | Method for processing ultra-long 10kV feeder line faults based on intermediate circuit breaker | |
| CN111371078A (en) | On-site feeder automation method based on full circuit breaker | |
| CN109613394B (en) | Intelligent distributed voltage-adding time type in-situ fault section discrimination method | |
| CN104319743A (en) | Method and device for quick backup protection of high-voltage side of main transformer based on station region information | |
| CN107230970A (en) | A kind of singlephase earth fault processing method of the feeder automation of type on the spot | |
| CN112510657A (en) | Feeder automation line fault processing method and system with distributed power supply access | |
| CN114062973B (en) | In-situ feeder automation reverse locking application method | |
| CN112234585A (en) | Medium-voltage direct-current power distribution network protection control system and method | |
| CN111786383B (en) | Spare power automatic switching device and method for realizing mutual backup of multiple power incoming lines | |
| CN104124749B (en) | The dual-ring network distribution line failure processing method that prepared auto restart coordinates with power distribution automation | |
| CN109861179B (en) | Bus protection voltage switching method suitable for hand-in-hand power supply mode | |
| CN110932244B (en) | Relay protection method for no-switching of all-station protection outlet pressure plates of transformer substation | |
| CN107666142A (en) | The input strategy of the automatic throw-in equipment of emergency power supply of power distribution network unconditional crank | |
| CN114243658A (en) | Feeder automation processing method applying 5G network slice communication technology | |
| CN109167379B (en) | Coordination control method for converter station and direct current circuit breaker of flexible direct current system | |
| CN106992598B (en) | Implementation method for simplifying spare power automatic switching start-up discrimination logic | |
| CN214900167U (en) | DCS system-based high-connection low-protection system for low-voltage station transformer | |
| CN116345420B (en) | Communication transfer processing method and system for distribution line faults | |
| CN111600281B (en) | Method for cutting off small power supply of power distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200703 |