CN111064168A - Line strong power transmission judgment method based on multi-source data fusion - Google Patents
Line strong power transmission judgment method based on multi-source data fusion Download PDFInfo
- Publication number
- CN111064168A CN111064168A CN201911106712.0A CN201911106712A CN111064168A CN 111064168 A CN111064168 A CN 111064168A CN 201911106712 A CN201911106712 A CN 201911106712A CN 111064168 A CN111064168 A CN 111064168A
- Authority
- CN
- China
- Prior art keywords
- line
- fault
- management system
- protection
- source data
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000004927 fusion Effects 0.000 title claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 36
- 230000010355 oscillation Effects 0.000 claims abstract description 15
- 230000002159 abnormal effect Effects 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 52
- 230000001133 acceleration Effects 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- 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
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- 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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/263—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 involving signal transmission between at least two stations involving transmissions of measured values
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a line strong power transmission judgment method based on multi-source data fusion, which relates to the field of power system fault comprehensive processing and solves the problem of whether power transmission is tried after a power grid line fails, wherein after the line fails, if the following ten conditions occur, strong power transmission is not allowed, (1) a full cable line; (2) the trip circuit has no main protection which can rapidly remove faults; (3) a report that the trip line has not met the operating condition is received; (4) tripping circuit high-impedance protection action; (5) when a circuit trips, the system is accompanied by oscillation; (6) when the line is overhauled and the power is recovered or the test run line trips; (7) confirming that a three-phase short circuit fault occurs in the line; (8) live working or live crossing construction is carried out on the line; (9) the forced-sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails; (10) when the protection action information is abnormal; the invention utilizes multi-source data to fuse and carries out strong power transmission judgment on the line.
Description
Technical Field
The invention relates to the field of comprehensive processing of faults of a power system, in particular to a line strong power transmission judgment method based on multi-source data fusion.
Background
In order to improve the reliability of the transmission line, an automatic reclosing device is arranged on the common line. When the instantaneous fault tripping occurs on the line, the breaker is automatically closed in a short time (generally 1 second), and the line power supply is recovered. However, due to the particularity of some faults, such as repeated lightning strike, long arc extinguishing time of fault points, or defects of a circuit breaker and an automatic reclosing device, reclosing cannot be completely reclosed successfully when a circuit has an instantaneous fault. Therefore, after the line fault trips, when the automatic reclosing is not installed or does not work, the on-site on-duty personnel need to forcibly send the automatic reclosing once without waiting for a scheduling command. And if the circuit breaker is forcibly sent for re-tripping or reclosed for re-tripping, whether to try to send or not is determined according to the appearance inspection result of the circuit breaker and the tripping times of the circuit breaker. When the forced delivery or the trial delivery is unsuccessful, the line personnel should immediately carry out the accident line patrol and find out the fault point as soon as possible. Before a fault point is not found out, a line operator cannot require a power transformation attendant to test and transmit power to the fault line for multiple times, so that the power transformation equipment and line elements are prevented from being damaged, and even the safety of an operator is threatened. After the line breaks down, if the following ten conditions occur, forced transmission is not allowed, (1) the full cable line; (2) the trip circuit has no main protection which can rapidly remove faults; (3) a report that the trip line has not met the operating condition is received; (4) tripping circuit high-impedance protection action; (5) when a circuit trips, the system is accompanied by oscillation; (6) when the line is overhauled and the power is recovered or the test run line trips; (7) confirming that a three-phase short circuit fault occurs in the line; (8) live working or live crossing construction is carried out on the line; (9) the forced-sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails; (10) and protecting the action information when the action information is abnormal. The abnormal condition of the protection action information comprises the following steps: the main line protection is not tripped by the backup protection; reclosing the door without starting, wherein actions on two sides of the reclosing door are inconsistent (one side is successfully superposed, the other side is not superposed or is not successfully superposed; one side is unsuccessfully superposed, and the other side is not superposed); the accelerating element acts.
Disclosure of Invention
In order to solve the problems, the invention provides a line strong power transmission judgment method based on multi-source data fusion, which solves the problem of whether power transmission is tried after a power grid line fails, and the specific technical scheme is as follows:
a line strong power transmission judgment method based on multi-source data fusion comprises the following steps,
step 1, when a power grid fails, judging whether the power grid is a permanent line fault;
step 2, if the fault is determined to be a permanent fault of the line, determining whether the following ten conditions occur,
(1) a full cable line; (2) the trip circuit has no main protection which can rapidly remove faults; (3) a report that the trip line has not met the operating condition is received; (4) tripping circuit high-impedance protection action; (5) when a circuit trips, the system is accompanied by oscillation; (6) when the line finishes the power restoration or the test run line trips; (7) confirming that a three-phase short circuit fault occurs in the line; (8) live working or live crossing construction is carried out on the line; (9) the forced-sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails; (10) when the protection action information is abnormal;
and step 3, if any one of the conditions is judged to be present, the strong power transmission is not allowed, and if any one of the conditions is judged not to be present, the strong power transmission is allowed.
Further, the 'full cable line' judges the line fault through a fault judgment module of the energy management system.
Furthermore, the 'main protection that the trip circuit has no fault which can be rapidly removed' is comprehensively judged by data in an energy management system and a protection and fault information management system.
Further, the 'report that the trip line has no operating condition' is obtained by checking the equipment condition on site and manually reporting after the line has a fault.
Furthermore, the trip circuit high-impedance protection action is comprehensively judged by an energy management system and a protection and fault information management system.
Furthermore, the 'system accompanied with oscillation phenomenon during line tripping' is comprehensively judged through data in an energy management system, a protection and fault information management system and a wide area measurement system.
Furthermore, the three-phase short circuit fault of the confirmed line is comprehensively judged by an energy management system or a protection and fault information management system.
Furthermore, the 'live working or live crossing construction of the line' acquires a maintenance plan and three-span information through an asset management information system, and is comprehensively judged by combining a fault judgment module in the energy management system.
Furthermore, the 'line repair end power restoration or test run line trip' is judged by a manual fault criterion of a fault judgment module in the energy management system.
Furthermore, the 'forced sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails' is judged by acquiring a data result calculated in advance from the asset management system; the protection action information is comprehensively acquired through the energy management system and the protection and fault information management system when the protection action information is abnormal.
Compared with the prior art, the invention has the beneficial effects that:
after a permanent fault occurs in a line, whether the following conditions are met or not is judged by a system; (1) a full cable line; (2) the trip circuit has no main protection which can rapidly remove faults; (3) a report that the trip line has not met the operating condition is received; (4) tripping circuit high-impedance protection action; (5) when a circuit trips, the system is accompanied by oscillation; (6) when the line is overhauled and the power is recovered or the test run line trips; (7) confirming that a three-phase short circuit fault occurs in the line; (8) live working or live crossing construction is carried out on the line; (9) the forced-sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails; (10) when the protection action information is abnormal; if any one of the fault lines is met, the fault line is prompted to a dispatcher, and the current fault line cannot be sent in a trial mode, so that personal safety and power grid safety are guaranteed, the accident is prevented from being expanded, and safe and stable operation of the power grid is guaranteed.
Drawings
Fig. 1 is a flow chart of determining line power-up according to the present invention.
Detailed Description
For a better understanding of the present invention, the following examples are included to further illustrate the invention:
a line strong power transmission judgment method based on multi-source data fusion is characterized in that after a line has a permanent fault, strong power transmission is not allowed under certain conditions, as shown in figure 1, the invention clearly indicates that strong power transmission is not allowed under the following 10 conditions. (1) A full cable line; (2) the trip circuit has no main protection which can rapidly remove faults; (3) a report that the trip line has not met the operating condition is received; (4) tripping circuit high-impedance protection action; (5) when a circuit trips, the system is accompanied by oscillation; (6) when the line is overhauled and the power is recovered or the test run line trips; (7) confirming that a three-phase short circuit fault occurs in the line; (8) live working or live crossing construction is carried out on the line; (9) the forced-sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails; (10) and protecting the action information when the action information is abnormal. The abnormal condition of the protection action information comprises the following steps: the main line protection is not tripped by the backup protection; reclosing the door without starting, wherein actions on two sides of the reclosing door are inconsistent (one side is successfully superposed, the other side is not superposed or is not successfully superposed; one side is unsuccessfully superposed, and the other side is not superposed); the accelerating element acts.
And judging whether the line has a fault or not by a fault judgment module in the I-zone energy management system. The fault judgment module has the judgment logics of various types of equipment, the specific judgment logics are not the key points of the invention, and the invention only utilizes the results of the fault judgment module.
After the fault judgment module judges that the line has a fault, whether the line is a full cable line needs to be confirmed again. The cable line is insulated, and the fault that the cable takes place is the permanent fault of insulation breakdown mostly, not only coincidence success rate is not high, but also aggravates the insulation damage degree. Therefore, a cable line failure does not allow a trial delivery. The line attributes (such as length, model, whether overhead lines are available, etc.) are typically stored in the asset management information system in zone III (and possibly in other systems in zone III), and the fault determination module is in the energy management system in zone I. Meanwhile, the line name in the I-zone energy management system and the line name in the III-zone asset management information system may be different (for example, the line name of the I-zone energy management system is skyhook I line, and the line name of the III-zone asset information management system is skyhook one line), so that the data can be used only after the names in the two systems are matched. The first method is to synchronize the line information (in the form of xml file or txt, etc.) in the I-region energy management system to the III region through the I/III region forward isolation device, the III region asset management information system derives the line information as the format file of xml or txt, etc., the line name matching in the III region is completed in the two systems through program automatic matching or manual matching, the matched file is synchronized to the I region from the III region through the I/III region reverse isolation device, the matched file can be the newly generated format file of xml, txt, etc., and the attribute can also be added in the original file as long as the parsing program can identify the file. The other mode is that the line information in the asset management information system of the area III is synchronized to the area I from the area III through the reverse isolation device of the area I/III, the line name matching in the two systems is completed in the area I through program automatic matching or manual matching, and the specific matching method is the same as that in the first mode. After matching, whether the fault line in the I-zone energy management system is a full cable line can be judged.
The judgment of the main protection is comprehensively judged through data in the energy management system and the protection and fault information management system. One line has two ends, each end has two sets of protection, and each end has at least one set of main protection action in the scheme to judge as the main protection action of the end.
The line main protection refers to line differential protection or line high-frequency protection. The line differential protection is judged by a differential protection signal of a protection device received by a main station end when a line fails, and the differential protection signal is from an energy management system or a protection and fault information management system. How to judge whether the signal is a differential protection signal is identified by a keyword or a measurement type, that is, the content of the signal contains a specific keyword or the signal is associated with a specific measurement type.
The high-frequency protection of the line receives the pilot distance or pilot zero sequence direction of the protection device through the main station end when the line fails, and the high-frequency protection signal comes from an energy management system or a protection and fault information management system. How to judge whether the signal is a high-frequency signal is identified by a keyword or a measurement type, that is, the content of the signal contains a specific keyword or the signal is associated with a specific measurement type.
After a line has a fault, the conditions of primary equipment and secondary equipment must be checked on site, if the condition that the trip line does not have the operation condition is reported on site, such as the abnormality of a protection device, strong transmission cannot be carried out, a report that the trip line has not the operation condition is received can only be obtained from the management aspect, the I-area energy management system cannot obtain the information in real time, namely, a software system cannot judge the strong transmission condition in real time.
The high-resistance protection of the line belongs to permanent faults, so that trial delivery cannot be carried out after the faults occur.
The trip circuit high-impedance protection is comprehensively judged by a fault judgment module in an I-zone energy management system and data in a protection and fault information management system. A fault judgment module in the I-zone energy management system can accurately judge whether a line has a fault or a high impedance of line connection has a high impedance fault, and after the high impedance fault, a switch connected with the line on the side is tripped, and meanwhile, a long-trip command is sent to trip the switch connected with the side.
Whether the line is accompanied with the oscillation phenomenon during tripping is comprehensively judged by a fault judgment module of the I area energy management system and a low-frequency oscillation module in the I area wide area measurement system.
A low-frequency oscillation module in the I-area wide area measurement system can judge which station and which unit oscillate and send an alarm, the low-frequency oscillation alarm has station attributes, unit attributes and the like, and a fault judgment module in the I-area energy management system confirms whether the oscillating unit has topological association with a fault tripping line or not according to the network topology and the low-frequency oscillation alarm of the I-area wide area measurement system. And if the topological association relationship exists, judging that the system is accompanied with the oscillation phenomenon when the circuit trips, otherwise, judging that the system is free of the oscillation phenomenon when the circuit trips.
And when the line is judged to be repaired and the power is restored or the line is subjected to test operation and trip is judged to be the conclusion obtained by the manual fault criterion in the fault diagnosis module of the I-zone energy management system. The hand-closing fault judgment comprises the following three conditions: (1) the switch closing action (2) protects the action (3) and the switch opening action.
The fault of the line can be judged by a fault judging module in the I-area energy management system, and the fault phase of the line can be obtained by a protection and fault management system. And finally, the three-phase short circuit fault of the line is comprehensively judged by combining a fault diagnosis module of the I-area energy management system with the fault phase in the protection and fault management system.
And the live-line operation or live-line crossing construction of the line is comprehensively judged by acquiring a maintenance plan in the asset management information system in the area III and combining a fault judgment module in the energy management system in the area I.
The maintenance plan of the III area is synchronized to the I area through the I/III area reverse isolation device, and the maintenance plan is a text and needs to be matched with the line information of the I area after being acquired.
The method comprises the steps that when a single-phase fault single-phase switch fails, the failure instability of the switch possibly causing system instability is achieved by obtaining stability calculation result data in a mode department, the information is calculated in advance by the mode department, the information is stored in an asset management system in a zone III and is synchronized to the zone I from the zone III through a reverse isolation device of the zone I/III.
The abnormal condition of the protection action information comprises the following steps: the main line protection is not tripped by the backup protection; reclosing the door without starting, wherein actions on two sides of the reclosing door are inconsistent (one side is successfully superposed, the other side is not superposed or is not successfully superposed; one side is unsuccessfully superposed, and the other side is not superposed); the accelerating element acts.
The inconsistent actions at the two sides of the reclosure are comprehensively judged by a fault judgment module in the I-zone energy management system. After the line fault, the reclosing has two-end information, the reclosing judgment is carried out according to each end, and the reclosing of each end is switched into three conditions: (1) success of coincidence, (2) failure of coincidence, (non-coincidence action).
The action of the acceleration element is comprehensively judged by a fault judgment module and a protection and fault management information system in the I-area energy management system. The line acceleration element receives a distance acceleration or zero sequence acceleration action signal of the protection device through a main station end when a line fails, and the acceleration action signal is from an energy management system or a protection and fault information management system. How to judge whether the signal is an acceleration signal is identified by a keyword or a measurement type, that is, the content of the signal contains a specific keyword or the signal is associated with a specific measurement type.
The present invention is not limited to the above-described embodiments, which are merely preferred embodiments of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A circuit strong power transmission judgment method based on multi-source data fusion is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step 1, when a power grid fails, judging whether a line has a permanent fault;
step 2, if the fault is determined to be a permanent fault of the line, determining whether the following ten conditions occur,
(1) a full cable line; (2) the trip circuit has no main protection which can rapidly remove faults; (3) a report that the trip line has not met the operating condition is received; (4) tripping circuit high-impedance protection action; (5) when a circuit trips, the system is accompanied by oscillation; (6) when the line is overhauled and the power is recovered or the test run line trips; (7) confirming that a three-phase short circuit fault occurs in the line; (8) live working or live crossing construction is carried out on the line; (9) the forced-sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails; (10) when the protection action information is abnormal;
and step 3, if any one of the conditions is judged to be present, the strong power transmission is not allowed, and if any one of the conditions is judged not to be present, the strong power transmission is allowed.
2. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the 'full cable line' is obtained by judging the line fault through a fault judging module of the energy management system.
3. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the 'main protection that the trip circuit has no fault which can be quickly removed' is comprehensively judged by data in an energy management system and a protection and fault information management system.
4. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the 'report that the trip line has not the operation condition' is obtained by checking the equipment condition on site and manually reporting after the line has a fault.
5. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the 'trip circuit high-impedance protection action' is comprehensively judged by an energy management system and a protection and fault information management system.
6. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the 'system accompanied with oscillation phenomenon during line tripping' is comprehensively judged through data in an energy management system, a protection and fault information management system and a wide area measurement system.
7. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the three-phase short circuit fault of the confirmed line is comprehensively judged by an energy management system or a protection and fault information management system.
8. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the method comprises the steps that a line is subjected to live working or live crossing construction, a maintenance plan and three-span information are obtained through an asset management information system, and comprehensive judgment is conducted by combining a fault judgment module in an energy management system.
9. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: and the judgment is carried out by a manual fault criterion of a fault judgment module in the energy management system when the line maintenance is finished and the power is restored or the test run line is tripped.
10. The line power-on judgment method based on multi-source data fusion of claim 1, characterized in that: the forced sending switch is a switch which can cause system instability when the single-phase fault single-phase switch fails, and is judged by acquiring a data result calculated in advance from the asset management system; the protection action information is comprehensively acquired through the energy management system and the protection and fault information management system when the protection action information is abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911106712.0A CN111064168A (en) | 2019-11-13 | 2019-11-13 | Line strong power transmission judgment method based on multi-source data fusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911106712.0A CN111064168A (en) | 2019-11-13 | 2019-11-13 | Line strong power transmission judgment method based on multi-source data fusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111064168A true CN111064168A (en) | 2020-04-24 |
Family
ID=70297981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911106712.0A Pending CN111064168A (en) | 2019-11-13 | 2019-11-13 | Line strong power transmission judgment method based on multi-source data fusion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111064168A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932777A (en) * | 2016-05-31 | 2016-09-07 | 国网山东省电力公司济南供电公司 | Intelligent processing method for transmission line fault and apparatus thereof |
| CN106779171A (en) * | 2016-11-25 | 2017-05-31 | 国网山东省电力公司济南供电公司 | A kind of strong power transmission Intelligent Decision-making Method of transmission line malfunction |
| CN107834546A (en) * | 2017-11-14 | 2018-03-23 | 国网山东省电力公司烟台供电公司 | A kind of area power grid circuit send by force aid decision-making system and method |
| WO2018120054A1 (en) * | 2016-12-30 | 2018-07-05 | Abb Schweiz Ag | Method and control system for faulted phase detection |
-
2019
- 2019-11-13 CN CN201911106712.0A patent/CN111064168A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932777A (en) * | 2016-05-31 | 2016-09-07 | 国网山东省电力公司济南供电公司 | Intelligent processing method for transmission line fault and apparatus thereof |
| CN106779171A (en) * | 2016-11-25 | 2017-05-31 | 国网山东省电力公司济南供电公司 | A kind of strong power transmission Intelligent Decision-making Method of transmission line malfunction |
| WO2018120054A1 (en) * | 2016-12-30 | 2018-07-05 | Abb Schweiz Ag | Method and control system for faulted phase detection |
| CN107834546A (en) * | 2017-11-14 | 2018-03-23 | 国网山东省电力公司烟台供电公司 | A kind of area power grid circuit send by force aid decision-making system and method |
Non-Patent Citations (1)
| Title |
|---|
| 国家电力调度通信中心: "《电网调度运行实用技术问答》", 31 March 2000, 中国电力出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102218268B1 (en) | Substation Automation Operating Device Equipped with Automatic Generation of Failure Judgment and Failure Recovery Scenarios | |
| CN102035202B (en) | Network reconfiguration system | |
| AU2020222903B2 (en) | Tie switch restoration | |
| CN108957243A (en) | A kind of method for locating single-phase ground fault and system applied to power distribution network | |
| CN101752909B (en) | Remote checking method of operation circuit | |
| JP6770635B2 (en) | Line short circuit failure section switching system and switching method in an inverter-based stand-alone microgrid | |
| CN107657375A (en) | A kind of method for electric network fault judgement, verification and fault incidence analysis | |
| CN105680424B (en) | The guard method of the overhead transmission line temporary fault of flexible direct current power transmission system | |
| CN103354352A (en) | Distributed intelligence based power distribution network safety protection method | |
| CN112421615A (en) | Power distribution station self-healing control method and system based on intelligent breaker action | |
| CN113937736B (en) | Power system fault protection system and protection method | |
| CN106849367A (en) | A kind of transformer station's remote online monitoring and state evaluating method | |
| CN104636990A (en) | Method of real-time troubleshooting and early warning for shutdown reasons of power grid equipment based on N-1 principle | |
| JP3436445B2 (en) | Power system monitoring system | |
| CN111064168A (en) | Line strong power transmission judgment method based on multi-source data fusion | |
| Kuru et al. | Control-center-based automatic fault isolation and restoration system for rural medium voltage networks | |
| CN115378127A (en) | Fault depth diagnosis method based on multi-dimensional data real-time analysis of power grid equipment | |
| CN114825627A (en) | Self-healing method for line fault of power distribution network | |
| KR20180090106A (en) | Fault management system for power distribution management system | |
| JP4330781B2 (en) | Monitoring and control system and automatic power transmission method | |
| KR20110043512A (en) | System and method for deciding a fault type of power transmission line | |
| CN116846079A (en) | Monitoring method and device for automatic switch of power distribution network | |
| Mukhopadhyay et al. | Performance evaluation and review of system protection schemes using synchrophasor measurement | |
| CN213072101U (en) | Instantaneous fault distinguishing and eliminating device for 10kV hybrid distribution line | |
| CN114899944B (en) | Communication management machine |
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 |
Application publication date: 20200424 |
|
| RJ01 | Rejection of invention patent application after publication |