CN112350287A - Device and method for processing faults of hybrid line of power distribution network - Google Patents
Device and method for processing faults of hybrid line of power distribution network Download PDFInfo
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- CN112350287A CN112350287A CN202011202089.1A CN202011202089A CN112350287A CN 112350287 A CN112350287 A CN 112350287A CN 202011202089 A CN202011202089 A CN 202011202089A CN 112350287 A CN112350287 A CN 112350287A
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- fault
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- reclosing
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003672 processing method Methods 0.000 claims 1
- 230000001052 transient effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- 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
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
-
- 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
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
Abstract
The invention discloses a device and a method for processing faults of a hybrid line of a power distribution network, wherein a line information acquisition module comprises the following steps: collecting and processing line information; a fault positioning module: judging whether a fault exists according to the collected line information, and determining a fault section; a fault processing module: and performing fault processing according to the determined fault section, specifically, performing reclosing operation if the fault section is an overhead line, and locking the reclosing to perform power supply switching if the fault section is a cable section. If the reclosing operation is carried out on the overhead line, the power supply is recovered, and if the reclosing operation is carried out on the cable section, the reclosing is closed, so that secondary impact caused by reclosing is avoided, power supply switching is carried out in time, and long-time power failure is avoided.
Description
Technical Field
The invention relates to the field of fault processing of hybrid lines, in particular to a fault processing device and method for a hybrid line of a power distribution network.
Background
At present, hybrid lines composed of overhead lines and cables are increasingly common, the overhead lines are overhead by supports, and the cables are buried underground or on the sea floor. The overhead line and the cable have different structures and performances, and when the export fails, the fault cannot be simply processed, otherwise, secondary impact may be caused to damage the line.
Disclosure of Invention
In order to solve the problems, the invention provides a device and a method for processing faults of a hybrid line of a power distribution network.
The technical scheme of the invention is as follows: a fault processing device for a hybrid line of a power distribution network comprises,
the line information acquisition module: collecting and processing line information;
a fault positioning module: judging whether a fault exists according to the collected line information, and determining a fault section;
a fault processing module: and performing fault processing according to the determined fault section, specifically, performing reclosing operation if the fault section is an overhead line, and locking the reclosing to perform power supply switching if the fault section is a cable section.
Further, the fault handling module performs fault handling, and further includes:
after reclosing operation is carried out, if the line is not recovered to be normal within the first preset time, the reclosing operation is carried out again;
when the reclosing operation times exceed the preset times, power supply switching is carried out, and fault information is transmitted to the background.
Furthermore, the line information acquisition module acquires line current through a photocurrent transformer, and a photocurrent transformer is arranged at the joint of each overhead line and the cable section in the line.
Further, the fault positioning module judges whether a fault exists based on the difference judgment and determines a fault section.
The technical scheme of the invention also comprises a method for processing the fault of the hybrid line of the power distribution network, which comprises the following steps:
collecting and processing line information;
judging whether a fault exists according to the collected line information, and determining a fault section;
and performing fault processing according to the determined fault section, specifically, performing reclosing operation if the fault section is an overhead line, and locking the reclosing to perform power supply switching if the fault section is a cable section.
Further, performing fault processing according to the determined fault section further includes:
after reclosing operation is carried out, if the line is not recovered to be normal within the first preset time, the reclosing operation is carried out again;
when the reclosing operation times exceed the preset times, power supply switching is carried out, and fault information is transmitted to the background.
Further, the collecting the line information specifically includes: the circuit current is collected through the photocurrent transformer, and the photocurrent transformer is arranged at the joint of each overhead line and the cable section in the circuit.
Further, whether a fault occurs is judged according to the collected line information, and a fault section is determined, specifically: and judging whether a fault exists based on difference discrimination according to the collected line information and determining a fault section.
The invention provides a device and a method for processing faults of a hybrid line of a power distribution network, which are provided with a line information acquisition module, a fault positioning module and a fault processing module, wherein the line information acquisition module acquires line information, the fault positioning module determines a fault section according to the line information, namely, whether the fault occurs in an overhead line or a cable section, reclosing operation is carried out to restore power supply if the fault occurs in the overhead line, reclosing is closed if the fault occurs in the cable section, secondary impact caused by reclosing is avoided, power supply switching is carried out in time, and long-time power failure is avoided.
Drawings
FIG. 1 is a block diagram illustrating a structure of an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
Example one
As shown in fig. 1, the present embodiment provides a power distribution network hybrid line fault processing apparatus, which includes a line information collection module, a fault location module, and a fault processing module.
The line information acquisition module is used for acquiring and processing line information, specifically, line current is acquired through the photocurrent transformer, it is noted that the hybrid line is composed of multiple sections of overhead lines and cables, and in order to acquire the line information and determine faults, a photocurrent transformer is arranged at the joint of each overhead line and a cable section, so that current information at two ends of each section of section is detected, and whether faults occur or not is judged and a fault section is determined. The collected current is three-phase current, and the line information collection module is used for synchronously processing the collected current for facilitating subsequent fault judgment.
And the fault positioning module is used for judging whether a fault occurs according to the collected line information and determining a fault interval. Based on the currents at the two ends of the interval collected by the line information collection module in this embodiment, the fault location module specifically judges whether a fault occurs through differential discrimination, and determines the fault interval.
The fault processing module is used for carrying out fault processing according to the determined fault interval, and the fault processing process comprises the following steps: and if the fault section is an overhead line, carrying out reclosing operation, and if the fault section is a cable section, locking the reclosing to carry out power supply switching. When guaranteeing cable segment trouble, do not carry out reclosing, avoid damaging the circuit.
In this embodiment, the process of performing fault processing by the fault processing module further includes:
after reclosing operation is carried out, if the line is not recovered to be normal within the first preset time, the reclosing operation is carried out again;
when the reclosing operation times exceed the preset times, power supply switching is carried out, and fault information is transmitted to the background.
When the overhead line trouble, because of the overhead line is mostly transient fault, consequently carry out reclosing operation in order to resume the power supply, nevertheless probably because contact failure or non-transient fault etc. cause the recovery failure, whether this embodiment in time detects after reclosing operation and resumes normally, if can not resume normally, then repeated switching-on, if the problem still can not be relieved to reclosing many times, then in time carry out power supply switching-on to avoid long-time power failure, pass to the backstage with trouble information simultaneously and inform staff in time to restore.
Example two
As shown in fig. 2, on the basis of the first embodiment, the present embodiment provides a method for processing a fault of a hybrid line of a power distribution network, including the following steps:
s1, collecting and processing the line information;
in this embodiment, the photocurrent transformer is used to collect the line current, and it should be noted that the hybrid line is composed of multiple sections of overhead lines and cables, and in order to collect line information and determine a fault, a photocurrent transformer is disposed at the joint of each overhead line and the cable section, so as to detect the current information at both ends of each section of section, and determine whether there is a fault and determine the fault section. The collected current is three-phase current, and the line information collection module is used for synchronously processing the collected current for facilitating subsequent fault judgment.
S2, judging whether there is fault according to the collected circuit information, and determining fault section;
based on the currents at the two ends of the collected interval, the fault positioning module specifically judges whether a fault occurs through difference judgment, and determines a fault interval.
S3, performing fault processing according to the determined fault section, specifically, performing reclosing operation if the fault section is an overhead line, and locking reclosing to perform power supply switching if the fault section is a cable segment;
this step ensures that reclosing is not performed when a cable segment fails, avoiding damaging the circuit.
In addition, the step S3 of performing fault handling further includes:
after reclosing operation is carried out, if the line is not recovered to be normal within the first preset time, the reclosing operation is carried out again;
when the reclosing operation times exceed the preset times, power supply switching is carried out, and fault information is transmitted to the background.
When the overhead line trouble, because of the overhead line is mostly transient fault, consequently carry out reclosing operation in order to resume the power supply, nevertheless probably because contact failure or non-transient fault etc. cause the recovery failure, whether this embodiment in time detects after reclosing operation and resumes normally, if can not resume normally, then repeated switching-on, if the problem still can not be relieved to reclosing many times, then in time carry out power supply switching-on to avoid long-time power failure, pass to the backstage with trouble information simultaneously and inform staff in time to restore.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. A fault processing device for a hybrid line of a power distribution network is characterized by comprising,
the line information acquisition module: collecting and processing line information;
a fault positioning module: judging whether a fault exists according to the collected line information, and determining a fault section;
a fault processing module: and performing fault processing according to the determined fault section, specifically, performing reclosing operation if the fault section is an overhead line, and locking the reclosing to perform power supply switching if the fault section is a cable section.
2. The hybrid line fault handling device for the power distribution network of claim 1, wherein the fault handling module performs fault handling, and further comprises:
after reclosing operation is carried out, if the line is not recovered to be normal within the first preset time, the reclosing operation is carried out again;
when the reclosing operation times exceed the preset times, power supply switching is carried out, and fault information is transmitted to the background.
3. The power distribution network hybrid line fault processing device of claim 1 or 2, wherein the line information acquisition module acquires the line current through a photocurrent transformer, and a photocurrent transformer is arranged at the connection of each overhead line and the cable section in the line.
4. The device for processing the fault of the hybrid line of the power distribution network according to claim 3, wherein the fault positioning module judges whether a fault exists or not and determines a fault section based on differential discrimination.
5. A fault processing method for a hybrid line of a power distribution network is characterized by comprising the following steps:
collecting and processing line information;
judging whether a fault exists according to the collected line information, and determining a fault section;
and performing fault processing according to the determined fault section, specifically, performing reclosing operation if the fault section is an overhead line, and locking the reclosing to perform power supply switching if the fault section is a cable section.
6. The method for processing the fault of the hybrid line of the power distribution network according to claim 5, wherein the step of processing the fault according to the determined fault section further comprises the steps of:
after reclosing operation is carried out, if the line is not recovered to be normal within the first preset time, the reclosing operation is carried out again;
when the reclosing operation times exceed the preset times, power supply switching is carried out, and fault information is transmitted to the background.
7. The power distribution network hybrid line fault handling method according to claim 5 or 6, wherein the collecting line information specifically includes: the circuit current is collected through the photocurrent transformer, and the photocurrent transformer is arranged at the joint of each overhead line and the cable section in the circuit.
8. The method for processing the fault of the hybrid line of the power distribution network according to claim 7, wherein whether the fault occurs is judged according to the collected line information, and a fault section is determined, specifically: and judging whether a fault exists based on difference discrimination according to the collected line information and determining a fault section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202089.1A CN112350287A (en) | 2020-11-02 | 2020-11-02 | Device and method for processing faults of hybrid line of power distribution network |
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| CN202011202089.1A CN112350287A (en) | 2020-11-02 | 2020-11-02 | Device and method for processing faults of hybrid line of power distribution network |
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| CN107453317A (en) * | 2017-09-21 | 2017-12-08 | 国网山东省电力公司 | A kind of three times reclosing method of distribution line |
| CN109473955A (en) * | 2018-11-14 | 2019-03-15 | 珠海许继电气有限公司 | A kind of adaptive distribution line failure treating method based on breaker |
| CN109709439A (en) * | 2019-02-25 | 2019-05-03 | 南京南瑞继保电气有限公司 | A kind of mixed line fault localization method based on joint acquisition unit |
| CN106256066B (en) * | 2014-08-01 | 2019-06-11 | 西门子电力自动化有限公司 | Distribution terminal and its judgment method with fault type arbitration functions |
-
2020
- 2020-11-02 CN CN202011202089.1A patent/CN112350287A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106256066B (en) * | 2014-08-01 | 2019-06-11 | 西门子电力自动化有限公司 | Distribution terminal and its judgment method with fault type arbitration functions |
| CN107453317A (en) * | 2017-09-21 | 2017-12-08 | 国网山东省电力公司 | A kind of three times reclosing method of distribution line |
| CN109473955A (en) * | 2018-11-14 | 2019-03-15 | 珠海许继电气有限公司 | A kind of adaptive distribution line failure treating method based on breaker |
| CN109709439A (en) * | 2019-02-25 | 2019-05-03 | 南京南瑞继保电气有限公司 | A kind of mixed line fault localization method based on joint acquisition unit |
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Application publication date: 20210209 |
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