CN108732467A - A kind of one-phase earthing failure in electric distribution network detection positioning system - Google Patents
A kind of one-phase earthing failure in electric distribution network detection positioning system Download PDFInfo
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- CN108732467A CN108732467A CN201810904471.3A CN201810904471A CN108732467A CN 108732467 A CN108732467 A CN 108732467A CN 201810904471 A CN201810904471 A CN 201810904471A CN 108732467 A CN108732467 A CN 108732467A
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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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- 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
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Abstract
The present invention discloses a kind of one-phase earthing failure in electric distribution network detection positioning system, including voltage detection module, fault diagnosis processor, electric power data library, failure indication module, earthing wire-selecting module, communication module and display terminal；Fault diagnosis processor is connect with voltage detection module, electric power data library, failure indication module respectively, and failure indication module is connect by earthing wire-selecting module with communication module, and communication module is connect with display terminal.The present invention passes through fault diagnosis processor and combination voltage detection module, failure indication module and earthing wire-selecting module etc., each busbar singlephase earth fault on power distribution network is detected, and the busbar to break down is positioned, the busbar position broken down is well understood convenient for staff, the system has the characteristics that detection result is good, accuracy is high, the duration manually overhauled when distribution network failure is reduced, overhaul efficiency is improved, and then improves stability and the safety of distribution network operation.
Description
Technical field
The invention belongs to distribution network technology fields, are related to a kind of one-phase earthing failure in electric distribution network detection positioning system.
Background technology
Power supply comes from power plant in electric system, and is transmitted to load side by high pressure or EHV transmission network, then
Electric energy is assigned to by voltage class lower network the user of different voltages grade, it is this that distribution electricity is mainly played in power network
The network that can be acted on is known as distribution network, abbreviation power distribution network.In the power system, power distribution network is to influence customer power supply reliability
Short slab, 95% or more the power off time of Chinese user is all caused by power distribution network at present.
It includes that three-phase shortcircuit and two-phase are short that the common failure of power distribution network, which mainly has short trouble and earth fault, short trouble,
Road, earth fault common type are singlephase earth faults, for very ripe in the detection technique of short trouble, and for list
The detection technique of phase earth fault is not perfect enough, at present after singlephase earth fault occurs, it is necessary to find single-phase earthing as early as possible
Fault point, debugging, the overvoltage that otherwise earth fault generates easily lead to electric cable explosion, voltage transformer pt is burnt, busbar
Burn equal power system accidents, if while ground path can give local resident, safety of livestock as regular link longtime running
Bring great hidden danger；
Currently, singlephase earth fault generally use artificial detection occurs the position of singlephase earth fault, to deposit in detection process
Long between when detecting, heavy workload, while also requiring the personnel checked that there is abundant working experience, it can in order to ensure power grid
By operation, mitigate the work load of staff, now refers to a kind of one-phase earthing failure in electric distribution network detection positioning system.
Invention content
The purpose of the present invention is to provide a kind of one-phase earthing failure in electric distribution network detect positioning system, solve power distribution network
During detection, the problem of can not quickly and efficiently be positioned to the position that single-phase fault earth fault occurs, greatly
Ground improves the working efficiency of personnel.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of one-phase earthing failure in electric distribution network detection positioning system, including voltage detection module, fault diagnosis processor, electricity
Force data library, failure indication module, earthing wire-selecting module, communication module and display terminal；Fault diagnosis processor respectively with electricity
Detection module, electric power data library, failure indication module connection, failure indication module is pressed to pass through earthing wire-selecting module and communication module
Connection, communication module are connect with display terminal；
Voltage detection module includes several residual voltage collecting units and several three-phase voltage collecting units, the zero sequence electricity
Pressure collecting unit is residual voltage sensor, is mounted on busbar, the zero sequence for acquiring each busbar in electric system in real time
Voltage, and the residual voltage of each busbar of acquisition is sent to fault diagnosis processor；The three-phase voltage collecting unit is
Three-phase voltage sensor is mounted on busbar, for acquiring the three-phase voltage in electric system on each busbar in real time, and will be adopted
The three-phase voltage of each busbar of collection is sent to fault diagnosis processor；
Electric power data library is for storing the corresponding threshold voltage of each busbar, the corresponding voltage detecting of each busbar number of storage
The address number and different address of module number corresponding busbar position；
Fault diagnosis processor receives the corresponding residual voltage of each number busbar and three-phase electricity that electric power detection module is sent
Pressure, judges whether residual voltage is more than 0, if being less than 0, fault diagnosis processor judges that the two-phase phase voltage in three-phase voltage is
The no upper limit voltage threshold values more than in electric power data library and whether another phase phase voltage is less than lower voltage limit threshold values, if three-phase voltage
In two-phase phase voltage be more than electric power data library in upper limit voltage threshold values and another phase phase voltage less than lower voltage limit threshold values then,
Show that singlephase earth fault is not present in busbar, otherwise, singlephase earth fault occurs in busbar；If more than 0, then it is single to illustrate that busbar occurs
Phase earth fault, fault diagnosis processor send busbar singlephase earth fault information and the busbar position of singlephase earth fault occur
It sets to failure indication module；
Failure indication module is mounted on each busbar, the singlephase earth fault for obtaining the transmission of fault diagnosis processor,
Busbar to singlephase earth fault occurs carries out indicating fault and sends fault message to earthing wire-selecting module；
Earthing wire-selecting module is connect with failure indication module, for detecting the circuit of ground connection in real time and on earth bus
Failure indication module sends calling instruction, meanwhile, the fault message that failure indication module is sent is received, and the failure of reception is believed
Breath is sent to display terminal through communication module；
Communication module uses wireless communication technique, communication module to be connect respectively with earthing wire-selecting module and display terminal, uses
In the long range radio transmissions for realizing fault message；
Display terminal is used to receive the fault message of communication module transmission and carries out the display of fault message.
Further, each busbar in power distribution network drag coefficient is both provided with corresponding number, and on busbar
Residual voltage collecting unit and three-phase voltage collecting unit address number it is identical as the number on the busbar, each
The corresponding number of busbar is denoted as 1,2 ..., i ..., n respectively according to the sequence of setting.
Further, the fault message includes fault characteristic value and the busbar position broken down.
Further, the threshold voltage includes upper limit voltage threshold values and lower voltage limit threshold values.
Beneficial effects of the present invention：
One-phase earthing failure in electric distribution network provided by the invention detects positioning system, by fault diagnosis processor and combines electricity
Detection module, failure indication module and earthing wire-selecting module etc. are pressed, each busbar singlephase earth fault on power distribution network is detected,
And the busbar to break down is positioned, the busbar position broken down, system tool are well understood convenient for staff
Have the characteristics that detection result is good, accuracy is high, reduce the duration manually overhauled when distribution network failure, improve overhaul efficiency,
And then improve stability and the safety of distribution network operation.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of schematic diagram of one-phase earthing failure in electric distribution network detection positioning system in the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, a kind of one-phase earthing failure in electric distribution network detects positioning system, including voltage detection module, event
Hinder diagnostic processor, electric power data library, failure indication module, earthing wire-selecting module, communication module and display terminal；Fault diagnosis
Processor is connect with voltage detection module, electric power data library, failure indication module respectively, and failure indication module passes through earthing wire-selecting
Module is connect with communication module, and communication module is connect with display terminal；
Voltage detection module includes several residual voltage collecting units and several three-phase voltage collecting units, the zero sequence electricity
Pressure collecting unit is residual voltage sensor, is mounted on busbar, the zero sequence for acquiring each busbar in electric system in real time
Voltage, and the residual voltage of each busbar of acquisition is sent to fault diagnosis processor；The three-phase voltage collecting unit is
Three-phase voltage sensor is mounted on busbar, for acquiring the three-phase voltage in electric system on each busbar in real time, and will be adopted
The three-phase voltage of each busbar of collection is sent to fault diagnosis processor；
Each busbar in power distribution network drag coefficient is both provided with corresponding number, and the residual voltage on busbar
The address number of collecting unit and three-phase voltage collecting unit is identical as the number on the busbar, ensures the consistent of number
Property, the corresponding number of each busbar is denoted as 1,2 ..., i ..., n respectively according to the sequence of setting；
Electric power data library is for storing the corresponding threshold voltage of each busbar, the corresponding voltage detecting of each busbar number of storage
The address number and different address of module number corresponding busbar position, the threshold voltage include upper limit voltage threshold values and
Lower voltage limit threshold values；
Fault diagnosis processor receives the corresponding residual voltage of each number busbar and three-phase electricity that electric power detection module is sent
Pressure, judges whether residual voltage is more than 0, if being less than 0, fault diagnosis processor judges that the two-phase phase voltage in three-phase voltage is
The no upper limit voltage threshold values more than in electric power data library and whether another phase phase voltage is less than lower voltage limit threshold values, if three-phase voltage
In two-phase phase voltage be more than electric power data library in upper limit voltage threshold values and another phase phase voltage less than lower voltage limit threshold values then,
Show that singlephase earth fault is not present in busbar, otherwise, singlephase earth fault occurs in busbar；If more than 0, then it is single to illustrate that busbar occurs
Phase earth fault, fault diagnosis processor send busbar singlephase earth fault information and the busbar position of singlephase earth fault occur
It sets to failure indication module；
Failure indication module is mounted on each busbar, the singlephase earth fault for obtaining the transmission of fault diagnosis processor,
Busbar to singlephase earth fault occurs carries out indicating fault and sends fault message to earthing wire-selecting module, the fault message
Including fault characteristic value and the busbar position etc. broken down；
Earthing wire-selecting module is connect with failure indication module, for detecting the circuit of ground connection in real time and on earth bus
Failure indication module sends calling instruction, meanwhile, the fault message that failure indication module is sent is received, and the failure of reception is believed
Breath is sent to display terminal through communication module；
Communication module uses wireless communication technique, communication module to be connect respectively with earthing wire-selecting module and display terminal, uses
In the long range radio transmissions for realizing fault message；
Display terminal is used to receive the fault message of communication module transmission and carries out the display of fault message, is believed according to failure
Breath is visually known the fault characteristic value of the busbar position and the busbar broken down, convenient for staff clearly to single-phase
Earth fault is efficiently located.
In addition, failure indication module is during uploading fault message to earthing wire-selecting module, if fault message has disappeared
It removes, then failure indication module stopping continues to upload fault message to earthing wire-selecting module.
One-phase earthing failure in electric distribution network provided by the invention detects positioning system, by fault diagnosis processor and combines electricity
Detection module, failure indication module and earthing wire-selecting module etc. are pressed, each busbar singlephase earth fault on power distribution network is detected,
And the busbar to break down is positioned, the busbar position broken down, system tool are well understood convenient for staff
Have the characteristics that detection result is good, accuracy is high, reduce the duration manually overhauled when distribution network failure, improve overhaul efficiency,
And then improve stability and the safety of distribution network operation.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or substitutes by a similar method, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (4)
1. a kind of one-phase earthing failure in electric distribution network detects positioning system, it is characterised in that：Including voltage detection module, fault diagnosis
Processor, electric power data library, failure indication module, earthing wire-selecting module, communication module and display terminal；Fault diagnosis processor
Connect respectively with voltage detection module, electric power data library, failure indication module, failure indication module by earthing wire-selecting module with
Communication module connects, and communication module is connect with display terminal；
Voltage detection module includes several residual voltage collecting units and several three-phase voltage collecting units, and the residual voltage is adopted
Integrate unit as residual voltage sensor, is mounted on busbar, the residual voltage for acquiring each busbar in electric system in real time,
And the residual voltage of each busbar of acquisition is sent to fault diagnosis processor；The three-phase voltage collecting unit is three-phase electricity
Pressure sensor is mounted on busbar, for acquiring the three-phase voltage in electric system on each busbar in real time, and by each of acquisition
The three-phase voltage of root busbar is sent to fault diagnosis processor；
Electric power data library is for storing the corresponding threshold voltage of each busbar, the corresponding voltage detection module of each busbar number of storage
Address number and different address number corresponding busbar position；
Fault diagnosis processor receives the corresponding residual voltage of each number busbar and three-phase voltage that electric power detection module is sent, and sentences
Whether sequence voltage off zero is more than 0, if being less than 0, fault diagnosis processor judges whether the two-phase phase voltage in three-phase voltage is big
Whether upper limit voltage threshold values and another phase phase voltage in electric power data library are less than lower voltage limit threshold values, if in three-phase voltage
Two-phase phase voltage is more than the upper limit voltage threshold values in electric power data library and another phase phase voltage is less than lower voltage limit threshold values then, shows
Singlephase earth fault is not present in busbar, and otherwise, singlephase earth fault occurs in busbar；If more than 0, then illustrate that single-phase connect occurs in busbar
Earth fault, fault diagnosis processor send busbar singlephase earth fault information and the busbar position of singlephase earth fault occur extremely
Failure indication module；
Failure indication module is mounted on each busbar, the singlephase earth fault for obtaining the transmission of fault diagnosis processor, to hair
The busbar of raw singlephase earth fault carries out indicating fault and sends fault message to earthing wire-selecting module；
Earthing wire-selecting module is connect with failure indication module, the circuit for detecting ground connection in real time and the failure on earth bus
Indicating module sends calling instruction, meanwhile, the fault message that failure indication module is sent is received, and the fault message of reception is passed through
Communication module is sent to display terminal；
Communication module uses wireless communication technique, communication module to be connect respectively with earthing wire-selecting module and display terminal, for real
The long range radio transmissions of existing fault message；
Display terminal is used to receive the fault message of communication module transmission and carries out the display of fault message.
2. a kind of one-phase earthing failure in electric distribution network according to claim 1 detects positioning system, it is characterised in that：Power distribution network
Each busbar in drag coefficient is both provided with corresponding number, and residual voltage collecting unit and three-phase on busbar
The address number of voltage acquisition unit is identical as the number on the busbar, and the corresponding number of each busbar is according to setting
Sequentially, it is denoted as 1,2 ..., i ..., n respectively.
3. a kind of one-phase earthing failure in electric distribution network according to claim 1 detects positioning system, it is characterised in that：The event
It includes fault characteristic value and the busbar position broken down to hinder information.
4. a kind of one-phase earthing failure in electric distribution network according to claim 1 detects positioning system, it is characterised in that：The electricity
Pressure valve value includes upper limit voltage threshold values and lower voltage limit threshold values.
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| CN201810904471.3A CN108732467A (en) | 2018-08-09 | 2018-08-09 | A kind of one-phase earthing failure in electric distribution network detection positioning system |
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| CN201810904471.3A CN108732467A (en) | 2018-08-09 | 2018-08-09 | A kind of one-phase earthing failure in electric distribution network detection positioning system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110568319A (en) * | 2019-10-25 | 2019-12-13 | 国网江苏省电力有限公司盐城供电分公司 | Power transmission line fault type judgment method based on signal difference |
| CN111624440A (en) * | 2020-05-26 | 2020-09-04 | 襄阳科能机电设备有限公司 | Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system |
| CN112305387A (en) * | 2020-10-31 | 2021-02-02 | 贵州电网有限责任公司 | Ground insulation detection and diagnosis system |
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Application publication date: 20181102 |