CN109387727A - A kind of high resistance earthing fault wire selection system and method - Google Patents
A kind of high resistance earthing fault wire selection system and method Download PDFInfo
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- CN109387727A CN109387727A CN201811571017.7A CN201811571017A CN109387727A CN 109387727 A CN109387727 A CN 109387727A CN 201811571017 A CN201811571017 A CN 201811571017A CN 109387727 A CN109387727 A CN 109387727A
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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Abstract
This application discloses a kind of high resistance earthing fault wire selection system and methods, detect in power circuit whether generate fault traveling wave by traveling wave detector module, acquisition module acquires fault traveling wave detected by traveling wave detector module, generate fault traveling wave data, and the fault traveling wave data are transferred to the communication module, the fault traveling wave data are transferred to judgment module by communication module, and the judgment module judges the route that high resistance earthing fault occurs according to the fault traveling wave data.Compared to the prior art, a kind of high resistance earthing fault wire selection system disclosed in the present application and method, not only effectively raise the detection accuracy of high resistance earthing fault, and can accurately position the route to break down.
Description
Technical field
This application involves Power System Faults Detection technical field more particularly to a kind of high resistance earthing fault wire selection system and
Method.
Background technique
High resistance earthing fault is a kind of common singlephase earth fault of power circuit, and singlephase earth fault occurs for power circuit
When, faulted phase current will change, and be mainly shown as that electric current increases.But when high resistance earthing fault occurs for power circuit
When, faulted phase current is little relative to the variation that non-faulting phase current generates, that is to say, that the fault signature of high resistance earthing fault
Unobvious, fault detection difficulty is larger, in this case be easy so that power circuit for a long time operate with failure, lead to failure model
The expansion enclosed.
In the prior art for the detection method that high resistance earthing fault occurs, mainly by monitoring and comparing power circuit
Amplitude, direction and the phase of middle difference feeder line zero-sequence current, to judge whether current power circuit occurs high resistance earthing fault.
But inventor has found in the research process of the application, and when occurring due to high resistance earthing fault, faulted phase current
The variation generated relative to non-faulting phase current is little, therefore whether judges power circuit by comparing the zero-sequence current of feeder line
The accuracy rate that high resistance earthing fault method occurs is not high.
Summary of the invention
It not high is asked to solve to judge in the prior art whether power circuit occurs the accuracy rate of high resistance earthing fault
Topic, the application disclose a kind of high resistance earthing fault wire selection system and method by following embodiment.
The application's in a first aspect, disclosing a kind of high resistance earthing fault wire selection system, the system comprises: traveling wave detector
Module, acquisition module, communication module and judgment module；
The traveling wave detector module is for detecting in power circuit whether generate fault traveling wave；
The acquisition module generates failed row wave number for acquiring fault traveling wave detected by the traveling wave detector module
According to, and the fault traveling wave data are transferred to the communication module, the fault traveling wave data include the traveling wave detector mould
Block detects temporal information when fault traveling wave generates；
The communication module is used to the fault traveling wave data being transferred to the judgment module；
The judgment module is used for the route for judging that high resistance earthing fault occurs according to the fault traveling wave data.
Optionally, the judgment module includes comparing unit and selecting unit；
The comparing unit is used for according to the temporal information, compare each route in power circuit generate fault traveling wave when
Between successively, and comparing result is sent to the selecting unit；
The selecting unit is used for according to the comparing result, and the earliest route for generating fault traveling wave is determined as the hair
The route of raw high resistance earthing fault.
Optionally, the system also includes power module, the power module is used for the acquisition module and described
Communication module provides power supply.
Optionally, the traveling wave detector module is HF current transformer.
Optionally, the communication module is communicated by wireless public network.
Optionally, the traveling wave detector module, the acquisition module, the communication module and power module installation
In on the shaft tower of the power circuit；
The judgment module is installed in the main website of the power circuit.
Optionally, the traveling wave detector module is mounted in the power circuit different by the shaft tower of the power circuit
On each phase line of feeder line, the power circuit includes a plurality of feeder line, and each feed line includes three-phase line.
Optionally, the power module is battery.
In the second aspect of the application, a kind of high resistance earthing fault selection method is disclosed, which comprises
Whether fault traveling wave is generated in traveling wave detector module detection power circuit；
Acquisition module acquires fault traveling wave detected by the traveling wave detector module, generates fault traveling wave data, and will
The fault traveling wave data are transferred to communication module, and the fault traveling wave data include that the traveling wave detector module detects failure
Temporal information when traveling wave generates；
The fault traveling wave data are transferred to judgment module by the communication module；
The judgment module judges the route that high resistance earthing fault occurs according to the fault traveling wave data.
Optionally, the judgment module judges the route that high resistance earthing fault occurs, packet according to the fault traveling wave data
It includes:
Comparing unit compares the time order and function that each route in power circuit generates fault traveling wave according to the temporal information,
And comparing result is sent to selecting unit；
The selecting unit is determined as the generation height according to the comparing result, by the earliest route for generating fault traveling wave
Hinder the route of ground fault.
This application discloses a kind of high resistance earthing fault wire selection system and method, the system comprises traveling wave detector module,
Acquisition module, communication module and judgment module.The traveling wave detector module is for detecting in power circuit whether generate failure
Traveling wave.The acquisition module is used to acquire fault traveling wave detected by the traveling wave detector module, generates fault traveling wave data,
And the fault traveling wave data are transferred to the communication module, the fault traveling wave data include the traveling wave detector module inspection
Measure temporal information when fault traveling wave generates.The communication module is used to the fault traveling wave data being transferred to the judgement
Module.The judgment module is used for the route for judging that high resistance earthing fault occurs according to the fault traveling wave data.
Certain feeder line occurs that transient state travelling wave can be generated when high resistance earthing fault in power circuit, i.e. generation fault traveling wave, should
Fault traveling wave will be propagated to other feeder lines, and the application cleverly utilizes this feature of fault traveling wave, when detecting failed row
When wave, indicate that high resistance earthing fault has occurred in power circuit at this time, by judging what the fault traveling wave generated in each feeder line
The route for generating fault traveling wave at first is determined as faulty line by time order and function.Compared to the prior art, disclosed in the present application one
Kind high resistance earthing fault wire selection system and method, not only effectively raise the detection accuracy of high resistance earthing fault, and energy
It is enough accurately to position the route to break down.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is a kind of structural schematic diagram of high resistance earthing fault wire selection system disclosed in the embodiment of the present application；
Fig. 2 is a kind of scheme of installation of high resistance earthing fault wire selection system disclosed in the embodiment of the present application；
Fig. 3 is a kind of workflow schematic diagram of high resistance earthing fault selection method disclosed in the embodiment of the present application；
Fig. 4 is a kind of application scenarios schematic diagram of high resistance earthing fault selection method disclosed in the embodiment of the present application.
Specific embodiment
It not high is asked to solve to judge in the prior art whether power circuit occurs the accuracy rate of high resistance earthing fault
Topic, the application disclose a kind of high resistance earthing fault wire selection system and method by following embodiment.
The application first embodiment discloses a kind of high resistance earthing fault wire selection system, the system comprises: traveling wave detector mould
Block, acquisition module, communication module and judgment module.
The traveling wave detector module is for detecting in power circuit whether generate fault traveling wave.
The acquisition module generates failed row wave number for acquiring fault traveling wave detected by the traveling wave detector module
According to, and the fault traveling wave data are transferred to the communication module, the fault traveling wave data include the traveling wave detector mould
Block detects temporal information when fault traveling wave generates.
The communication module is used to the fault traveling wave data being transferred to the judgment module.
The judgment module is used for the route for judging that high resistance earthing fault occurs according to the fault traveling wave data.
The above embodiments of the present application disclose a kind of high resistance earthing fault wire selection system, certain feeder line occurs in power circuit
Transient state travelling wave can be generated when high resistance earthing fault, i.e., generation fault traveling wave, the fault traveling wave will be propagated to other feeder lines, this Shen
This feature for please cleverly utilizing fault traveling wave indicates that high resistant has occurred in power circuit at this time when detecting fault traveling wave
Ground fault, the time order and function generated in each feeder line by judging the fault traveling wave will generate the line of fault traveling wave at first
Road is determined as faulty line.Compared to the prior art, a kind of high resistance earthing fault wire selection system disclosed in the present application, not only effectively
The detection accuracy for improving high resistance earthing fault, and can accurately position the route to break down.
Further, the judgment module includes comparing unit and selecting unit.
The comparing unit is used for according to the temporal information, compare each route in power circuit generate fault traveling wave when
Between successively, and comparing result is sent to the selecting unit.
The selecting unit is used for according to the comparing result, and the earliest route for generating fault traveling wave is determined as the hair
The route of raw high resistance earthing fault.
Further, the system also includes power module, the power module is used for the acquisition module and institute
It states communication module and power supply is provided.
Further, the traveling wave detector module is HF current transformer.
Wherein, current transformer (Current transformer, CT) is according to electromagnetic induction principle by the big electricity of primary side
Circulate the instrument for being changed to secondary side low current to measure, and HF current transformer may be simply referred to as high frequency CT.
Further, the communication module is communicated by wireless public network.
Wireless public network communication refers to Automation of Electric Systems terminal module access wireless public network by wireless communication, so
The communication mode of main station system is accessed by special optic fibre afterwards.Communication module has dedicated security module, has GPS, Beidou
Time adjustment function.
Further, the traveling wave detector module, the acquisition module, the communication module and power module peace
On shaft tower loaded on the power circuit.
The judgment module is installed in the main website of the power circuit.
Wherein, main website refers in power circuit voltage class highest in certain area, collects capacity maximum, coverage is most
Wide substation, judgment module are arranged in substation.
Further, the traveling wave detector module is mounted in the power circuit not by the shaft tower of the power circuit
With on each phase line of feeder line, the power circuit includes a plurality of feeder line, and each feed line includes three-phase line.
Specifically, being both provided with collection point on every phase line, it is fitted with traveling wave detector module at each collection point, adopts
Collection module, communication module and power module, judgment module are installed in the main website of power circuit, come from each acquisition for receiving
The fault traveling wave data of the communication module of point, and compare and judge.It is shown in Figure 1, it is illustratively disclosed in Fig. 1
6 schematic diagrames communicated between collection point and main website, wherein each collection point passes through the judgement in communication module and main website
Module carries out the transmission of fault traveling wave data using the mode that wireless public network communicates.
Shown in Figure 2, detection module (high frequency CT) is mounted on the shaft tower of power circuit, and passes through drainage thread and electric power
Connection, the fault traveling wave generated in real-time detection power circuit.Meanwhile it is the secondary side of detection module and acquisition module, logical
News module and power module are connected, and realize the transmission of fault traveling wave data and charge to power module.
Further, the power module is battery.
Wherein, power module provides power supply for acquisition module and communication module, its own is battery, passes through traveling wave detector
The secondary side of module, i.e. HF current transformer charges.
Another embodiment of the application discloses a kind of high resistance earthing fault selection method, and it is above-mentioned that the method is applied to the application
A kind of high resistance earthing fault wire selection system disclosed in embodiment.
Correspondingly, a kind of high resistance earthing fault selection method disclosed in the embodiment of the present application, shown in Figure 3, the side
Method includes:
Step S11, traveling wave detector module detect in power circuit whether generate fault traveling wave.
Step S12, acquisition module acquire fault traveling wave detected by the traveling wave detector module, generate failed row wave number
According to, and the fault traveling wave data are transferred to communication module, the fault traveling wave data include the traveling wave detector module inspection
Measure temporal information when fault traveling wave generates.
The fault traveling wave data are transferred to judgment module by step S13, the communication module.
Step S14, the judgment module judge the route that high resistance earthing fault occurs according to the fault traveling wave data.
Further, the judgment module judges the route that high resistance earthing fault occurs according to the fault traveling wave data,
Include:
Comparing unit compares the time order and function that each route in power circuit generates fault traveling wave according to the temporal information,
And comparing result is sent to selecting unit；
The selecting unit is determined as the generation height according to the comparing result, by the earliest route for generating fault traveling wave
Hinder the route of ground fault.
Shown in Figure 4, the embodiment of the present application discloses a kind of application scenarios of high resistance earthing fault selection method by Fig. 4
Example has 3 feedback lines on same group of bus in figure, and after high resistance earthing fault occurs for the A phase of feeder line 3, fault traveling wave is along feeder line 3
The phase line road direction both sides A propagate.After a period of time, 3 high frequency CT A of feeder line is first it is detected that the failed row transmitted from fault point
Wave signal, and by acquisition module and communication module, the fault traveling wave data with temporal information are passed back main website, using one
After the section time, fault traveling wave is traveled to through bus respectively at the high frequency CT A of feeder line 2 and at the high frequency CT A of feeder line 1, two height
Frequency CT passes main website back by respective acquisition module and communication module, by the fault traveling wave data with temporal information.In main website
Judgment module by time point different in 3 fault traveling wave data receiving of analysis, select and be initially received failed row
The feeder line 3 of wave is fault wire, remaining route is regular link, so far completes high resistance earthing fault route selection.
Combine detailed description and exemplary example that the application is described in detail above, but these explanations are simultaneously
It should not be understood as the limitation to the application.It will be appreciated by those skilled in the art that without departing from the application spirit and scope,
A variety of equivalent substitution, modification or improvements can be carried out to technical scheme and embodiments thereof, these each fall within the application
In the range of.The protection scope of the application is determined by the appended claims.
Claims (10)
1. a kind of high resistance earthing fault wire selection system characterized by comprising traveling wave detector module, acquisition module, communication module
And judgment module；
The traveling wave detector module is for detecting in power circuit whether generate fault traveling wave；
The acquisition module is used to acquire fault traveling wave detected by the traveling wave detector module, generates fault traveling wave data,
And the fault traveling wave data are transferred to the communication module, the fault traveling wave data include the traveling wave detector module inspection
Measure temporal information when fault traveling wave generates；
The communication module is used to the fault traveling wave data being transferred to the judgment module；
The judgment module is used for the route for judging that high resistance earthing fault occurs according to the fault traveling wave data.
2. system according to claim 1, which is characterized in that the judgment module includes that comparing unit and selection are single
Member；
The comparing unit is used to compare the time elder generation that each route in power circuit generates fault traveling wave according to the temporal information
Afterwards, and by comparing result it is sent to the selecting unit；
The selecting unit is used for according to the comparing result, and it is high that the earliest route for generating fault traveling wave is determined as the generation
Hinder the route of ground fault.
3. system according to claim 1, which is characterized in that the system also includes power module, the power module
For providing power supply to the acquisition module and the communication module.
4. system according to claim 1, which is characterized in that the traveling wave detector module is HF current transformer.
5. system according to claim 1, which is characterized in that the communication module is communicated by wireless public network.
6. system according to claim 3, which is characterized in that the traveling wave detector module, the acquisition module, described logical
News module and the power module are installed on the shaft tower of the power circuit；
The judgment module is installed in the main website of the power circuit.
7. system according to claim 6, which is characterized in that the traveling wave detector module passes through the bar of the power circuit
Tower is mounted in the power circuit on each phase line of different feeder lines, and the power circuit includes a plurality of feeder line, each feed line
Including three-phase line.
8. system according to claim 3, which is characterized in that the power module is battery.
9. a kind of high resistance earthing fault selection method characterized by comprising
Whether fault traveling wave is generated in traveling wave detector module detection power circuit；
Acquisition module acquires fault traveling wave detected by the traveling wave detector module, generates fault traveling wave data, and will be described
Fault traveling wave data are transferred to communication module, and the fault traveling wave data include that the traveling wave detector module detects fault traveling wave
Temporal information when generation；
The fault traveling wave data are transferred to judgment module by the communication module；
The judgment module judges the route that high resistance earthing fault occurs according to the fault traveling wave data.
10. according to the method described in claim 9, it is characterized in that, the judgment module is sentenced according to the fault traveling wave data
The disconnected route that high resistance earthing fault occurs, comprising:
Comparing unit compares the time order and function that each route in power circuit generates fault traveling wave according to the temporal information, and will
Comparing result is sent to selecting unit；
The earliest route for generating fault traveling wave is determined as the generation high resistant and connect by the selecting unit according to the comparing result
The route of earth fault.
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| CN201811571017.7A CN109387727A (en) | 2018-12-21 | 2018-12-21 | A kind of high resistance earthing fault wire selection system and method |
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| CN201811571017.7A CN109387727A (en) | 2018-12-21 | 2018-12-21 | A kind of high resistance earthing fault wire selection system and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101187687A (en) * | 2007-12-21 | 2008-05-28 | 清华大学 | High resistance earthing fault detection method based on transient traveling wave |
| CN101923137A (en) * | 2010-06-30 | 2010-12-22 | 湖南湘能电气自动化有限公司 | Single-phase ground fault line selecting method of small-electric current grounding system |
| CN201697994U (en) * | 2010-06-30 | 2011-01-05 | 湖南湘能电气自动化有限公司 | Small-current grounding system single-phase earth fault line selection device |
| CN103558488A (en) * | 2013-08-16 | 2014-02-05 | 国家电网公司 | High impedance grounding fault detection device based on transient state travelling waves |
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2018
- 2018-12-21 CN CN201811571017.7A patent/CN109387727A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187687A (en) * | 2007-12-21 | 2008-05-28 | 清华大学 | High resistance earthing fault detection method based on transient traveling wave |
| CN101923137A (en) * | 2010-06-30 | 2010-12-22 | 湖南湘能电气自动化有限公司 | Single-phase ground fault line selecting method of small-electric current grounding system |
| CN201697994U (en) * | 2010-06-30 | 2011-01-05 | 湖南湘能电气自动化有限公司 | Small-current grounding system single-phase earth fault line selection device |
| CN103558488A (en) * | 2013-08-16 | 2014-02-05 | 国家电网公司 | High impedance grounding fault detection device based on transient state travelling waves |
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Application publication date: 20190226 |