CN105891666A - Power-distribution-network single phase grounding fault positioning method based on network topology - Google Patents
Power-distribution-network single phase grounding fault positioning method based on network topology Download PDFInfo
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- CN105891666A CN105891666A CN201410624158.6A CN201410624158A CN105891666A CN 105891666 A CN105891666 A CN 105891666A CN 201410624158 A CN201410624158 A CN 201410624158A CN 105891666 A CN105891666 A CN 105891666A
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- fault
- information table
- injection signal
- network topology
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a power-distribution-network single phase grounding fault positioning method based on a network topology. The method is characterized by firstly, adding a special diagnosis signal from a primary side of a TV fault phase; then, using a feeding line terminal apparatus placed at each feeding line switch to collect zero sequence fault current parameters at the switch; using an injection signal current detector installed near the feeding line terminal apparatus to detect an injected diagnosis signal, and uploading the collected zero sequence fault current signal parameters and an injection signal current to a host; and finally, using a network topology fault area determination method, calculating and analyzing the feedback parameters by the host so as to form a fault determination information table, carrying out reduction on the fault determination information table to obtain a core attribute, and according to the attribute, determining a fault section. By using the method, the fault section can be rapidly and accurately positioned, an automation degree is high and the method is safe and reliable. Simultaneously, power supply reliability is increased, which is good for a power supply department to maintain power grid equipment.
Description
Technical field
The present invention relates to distribution network failure detection technique field, specifically one is opened up based on network
The one-phase earthing failure in electric distribution network localization method flutterred.
Background technology
In recent years, Chinese distribution network automated fast development, most urban power distribution networks have used joins
Automation System of Power Network, one-phase earthing failure in electric distribution network localization method based on Injection Signal principle is
Method for locating single-phase ground fault the most practical, maximally effective, and the method relies primarily on people
Work line walking, needs staff to make an inspection tour along route, observes by the naked eye discovery trouble point, the method
Shortcoming be:
1, staff's hand-held Injection Signal detector detects along distribution line, to staff
Cause life hidden danger, and locating speed is slow；
2, the method can only be carried out under conditions of system not power-off, trouble point exist always；
3, distribution network automated development can not be adapted to.
Summary of the invention
Not enough for above-mentioned prior art, the present invention provides a kind of fast and accurate for positioning, automatization's journey
Spend high one-phase earthing failure in electric distribution network localization method based on network topology.
The one-phase earthing failure in electric distribution network localization method based on network topology that the present invention provides is to pass through
Techniques below scheme realizes:
One-phase earthing failure in electric distribution network localization method based on network topology, comprises the following steps:
The first step: when there is singlephase earth fault, adds special examining from the primary side of TV fault phase
Break signal, is injecting shape between the primary side neutral point of TV, faulty line, trouble point and the earth
Become the loop of Injection Signal electric current；
Second step: utilize the feeder terminal unit laid at each feeder switch to gather zero at switch
Sequence fault current parameter, utilizes and is installed on the Injection Signal current probe inspection that feeder terminal unit is other
Survey the diagnostic signal injected；
3rd step: the zero-sequence fault electric current that will collect with the uplink passage of feeder terminal unit
Signal parameter and Injection Signal electric current are uploaded to main frame；
4th step: using the faulty section decision method of network topology, the parameter of feedback is passed through by main frame
Operational analysis, forms fault verification information table, fault verification information table yojan is obtained core attributes,
Fault section is can determine that according to this attribute.
Method according to claim 1, in described 4th step, main frame is according to Injection Signal electric current
Generate Injection Signal information vector G, adjoined by the detector relevant to fault feeder network structure
Matrix and injection information vector, through computing, an available fault verification matrix P, by matrix
P-shaped becomes fault verification information table, fault verification information table yojan is obtained core attributes, according to this genus
Property can determine that fault section.
The invention has the beneficial effects as follows:
1, the present invention can quick and precisely position fault section, and automaticity is high, safe and reliable.
2, improve the maintenance to grid equipment of the reliability of power supply, beneficially power supply department.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention.
Detailed description of the invention
One-phase earthing failure in electric distribution network localization method based on network topology as shown in Figure 1, including
Following steps:
The first step: when there is singlephase earth fault, adds special examining from the primary side of TV fault phase
Break signal, is injecting shape between the primary side neutral point of TV, faulty line, trouble point and the earth
Become the loop of Injection Signal electric current；
Second step: utilize the feeder terminal unit laid at each feeder switch to gather zero at switch
Sequence fault current parameter, utilizes and is installed on the Injection Signal current probe inspection that feeder terminal unit is other
Survey the diagnostic signal injected；
3rd step: the zero-sequence fault electric current that will collect with the uplink passage of feeder terminal unit
Signal parameter and Injection Signal electric current are uploaded to main frame；
4th step: using the faulty section decision method of network topology, the parameter of feedback is passed through by main frame
Operational analysis, forms fault verification information table, fault verification information table yojan is obtained core attributes,
Fault section is can determine that according to this attribute.
In described 4th step, main frame generates Injection Signal information vector G according to Injection Signal electric current, logical
Cross the detector adjacency matrix relevant to fault feeder network structure and inject information vector, Jing Guoyun
Calculate, an available fault verification matrix P, matrix p-shaped become fault verification information table, to event
Barrier judges that information table yojan obtains core attributes, can determine that fault section according to this attribute.
Claims (2)
1. one-phase earthing failure in electric distribution network localization method based on network topology, comprises the following steps:
The first step: when there is singlephase earth fault, adds particular diagnostic signal from the primary side of TV fault phase,
Injection Signal electric current is formed between the primary side neutral point of TV, faulty line, trouble point and the earth injecting
Loop；
Second step: utilize the feeder terminal unit laid at each feeder switch to gather the zero-sequence fault at switch
Current parameters, utilizes and is installed on the diagnosis that the other Injection Signal current probe detection of feeder terminal unit is injected
Signal；
3rd step: the zero-sequence fault current signal ginseng that will collect with the uplink passage of feeder terminal unit
Number and Injection Signal electric current are uploaded to main frame；
4th step: using the faulty section decision method of network topology, the parameter of feedback is divided by main frame by computing
Analysis, forms fault verification information table, fault verification information table yojan is obtained core attributes, can according to this attribute
Judge fault section.
One-phase earthing failure in electric distribution network localization method based on network topology the most according to claim 1,
It is characterized in that: in described 4th step, main frame generates Injection Signal information vector G according to Injection Signal electric current, logical
Cross the detector adjacency matrix relevant to fault feeder network structure and inject information vector, through computing, can
Obtain a fault verification matrix P, matrix p-shaped become fault verification information table, to fault verification information table about
Letter obtains core attributes, can determine that fault section according to this attribute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410624158.6A CN105891666A (en) | 2014-11-10 | 2014-11-10 | Power-distribution-network single phase grounding fault positioning method based on network topology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410624158.6A CN105891666A (en) | 2014-11-10 | 2014-11-10 | Power-distribution-network single phase grounding fault positioning method based on network topology |
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| CN105891666A true CN105891666A (en) | 2016-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342887A (en) * | 2018-11-22 | 2019-02-15 | 广州供电局有限公司 | Distribution network failure based on phasor measuring set unifies localization method and system |
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| CN101261304A (en) * | 2008-04-25 | 2008-09-10 | 山东大学 | Low current grounding system distribution circuit single-phase earth fault automatic position setting method |
| CN101303387A (en) * | 2008-04-09 | 2008-11-12 | 中国石油化工股份有限公司胜利油田分公司临盘采油厂 | Direct current injection type route selecting positioning system and method thereof |
| CN102981099A (en) * | 2012-12-10 | 2013-03-20 | 辽宁省电力有限公司沈阳供电公司 | Location method for single-phase earth fault of power distribution network based on genetic algorithm and location device |
| CN103454555A (en) * | 2013-08-02 | 2013-12-18 | 西安交通大学 | Power distribution network single-phase earth fault section positioning method based on parameter identification |
| CN103487724A (en) * | 2013-09-12 | 2014-01-01 | 国家电网公司 | Single-phase ground fault positioning method of power distribution network |
| CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
| CN103728532A (en) * | 2013-12-26 | 2014-04-16 | 长园深瑞继保自动化有限公司 | Power distribution network single-phase grounding fault judging and locating method |
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2014
- 2014-11-10 CN CN201410624158.6A patent/CN105891666A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101303387A (en) * | 2008-04-09 | 2008-11-12 | 中国石油化工股份有限公司胜利油田分公司临盘采油厂 | Direct current injection type route selecting positioning system and method thereof |
| CN101261304A (en) * | 2008-04-25 | 2008-09-10 | 山东大学 | Low current grounding system distribution circuit single-phase earth fault automatic position setting method |
| CN102981099A (en) * | 2012-12-10 | 2013-03-20 | 辽宁省电力有限公司沈阳供电公司 | Location method for single-phase earth fault of power distribution network based on genetic algorithm and location device |
| CN103454555A (en) * | 2013-08-02 | 2013-12-18 | 西安交通大学 | Power distribution network single-phase earth fault section positioning method based on parameter identification |
| CN103487724A (en) * | 2013-09-12 | 2014-01-01 | 国家电网公司 | Single-phase ground fault positioning method of power distribution network |
| CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
| CN103728532A (en) * | 2013-12-26 | 2014-04-16 | 长园深瑞继保自动化有限公司 | Power distribution network single-phase grounding fault judging and locating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109342887A (en) * | 2018-11-22 | 2019-02-15 | 广州供电局有限公司 | Distribution network failure based on phasor measuring set unifies localization method and system |
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Application publication date: 20160824 |