CN109061383A - A kind of microcomputer line selection device for low current - Google Patents
A kind of microcomputer line selection device for low current Download PDFInfo
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- CN109061383A CN109061383A CN201810898472.1A CN201810898472A CN109061383A CN 109061383 A CN109061383 A CN 109061383A CN 201810898472 A CN201810898472 A CN 201810898472A CN 109061383 A CN109061383 A CN 109061383A
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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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- 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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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention discloses a kind of microcomputer line selection device for low current, the device includes signal acquisition module, filter module, alarm module, remote administration terminal, photoelectric isolation module, display module, practical operation module, power module, record storage and central control module, the signal acquisition module is connect with filter module, filter circuit connects central control module by photoelectric isolation module, the remote administration terminal is connect by signal transmission module with photoelectric isolation module, the practical operation module connects central control module by photoelectric isolation module, the display module, power module connect central control module with record storage module.The present invention improves the accuracy of device route selection, reduces the probability of wrong report, to alleviate the workload of service personnel, the present invention, which can also be realized, carries out long-range isolation control to faulty line, improves Fault Isolation speed, substantially reduces the Fault Isolation time.
Description
Technical field
The invention belongs to power safety technique fields, specifically, being related to a kind of microcomputer line selection device for low current.
Background technique
The modern life be unable to do without electric power resource, and electric power resource is transmitted at a distance by the laying of power grid, 35KV's
In electrical power distribution system, central point is general earth-free or is grounded by arc suppression coil, when such distribution system occurs unidirectionally
When failure, since central point is earth-free or by grounding through arc, causes not generating back between fault ground point and central point
Road electric current, and capacitance current is only generated between circuit and ground, which is referred to as zero-sequence current, and the capacitance current is very
It is small, therefore such distribution system is also referred to as small current system, what low current distribution system at most occurred is exactly unidirectional ground connection event
Barrier, so if the position of the one-way earth fault in low current distribution system can quickly be positioned, it will be able to match low current
The more safe and reliable operation of electric system.
Microcomputer line selection device for low current is a kind of electric protection device for low current distribution system, which can be
Quickly judgement is out of order and is occurred position (Intranet, outer net or bus) when unidirectional ground connection occurs for low current power distribution circuit, and by therefore
Hinder location information remote transmission to service personnel, allows staff to react in time and corresponding position circuit is detected, but
It is that microcomputer line selection device for low current in the prior art is easy to produce wrong report at work, considerably increases the work of service personnel
Amount, in order to solve this problem, the present invention provides following technical schemes.
Summary of the invention
The purpose of the present invention is to provide a kind of microcomputer line selection device for low current.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of microcomputer line selection device for low current, including signal acquisition module, filter module, alarm module, long-range management are eventually
End, photoelectric isolation module, display module, practical operation module, power module, record storage and central control module, the signal are adopted
Collection module is connect with filter module, and filter circuit connects central control module by photoelectric isolation module, and the long-range management is whole
End is connect by signal transmission module with photoelectric isolation module, and the practical operation module connects center control by photoelectric isolation module
Module, the display module, power module and record storage module connect central control module；
The signal acquisition module includes voltage signal acquisition unit and current signal acquisition unit, and the voltage signal is adopted
Collection unit is used for the high-frequency signal of residual voltage when acquiring distribution system failure, and the current signal acquisition unit is for acquiring
The high-frequency signal of each route zero-sequence current when distribution system failure, the signal acquisition module connect center control by filter module
Molding block；
The filter module is used to carry out signal acquisition module residual voltage signal collected and zero sequence current signal
Digital filtering eliminates interference, is transmitted to central control module, the central control module pair by the signal that filter module is handled
Zero-sequence current selects current phase on the contrary and the route of amplitude maximum is made compared with the high-frequency signal of residual voltage carries out analysis
For the route that one-way earth fault occurs；
The power module is the power supply of microcomputer line selection device for low current；
The photoelectric isolation module include photoelectric isolating circuit and connect with photoelectric isolating circuit it is silicon-controlled, photoelectricity every
From module as the connection maincenter between central control module and each module, signal-to-noise ratio can be substantially reduced, improves route selection result
Reliability；
If the practical operation module includes the dry run contact being mounted on each route, can be connected by control operation contact
Connect or disconnect faulty line, to realize that failure removal and signal return, the practical operation module by output board card and photoelectricity every
It is connected from module, photoelectric isolation module is connect with central control module；
The remote administration terminal is connect by signal transmission module with central control module, the remote administration terminal packet
Control unit, monitoring unit and terminal speech communication unit are included, the monitoring unit is used to receive central control module upload
Location information occurs for one-way earth fault, and described control unit is used to issue control command, center control to central control system
Module controls corresponding operation contact in practical operation module according to the control command and returns to carry out failure removal and signal.
As further scheme of the invention, the voltage signal acquisition unit is zero sequential potential transformer, the electric current
Signal acquisition unit is zero sequence current mutual inductor.
As further scheme of the invention, the display module is connect with central control module, and display module is for showing
Show the location information that one-way earth fault occurs, include timing unit in display module, when central control module is to display module
After transmitting warning message, timing unit starts timing, while central control module controls alarm module alert.
As further scheme of the invention, the record storage module issues report for recording each central control module
The time of alert information and location information.
As further scheme of the invention, the acousto-optic warning unit is used to receive central control module sending
One-way earth fault occurs to issue sound-light alarm when location information, to remind service personnel to check concrete condition.
It further include terminal speech communication unit in the remote administration terminal as further scheme of the invention, it is described
Central control module is connected with speech communication module, can remotely be managed by terminal speech communication unit and speech communication module
Speech communication connection is established between reason terminal and central control module.
Beneficial effects of the present invention:
1, the present invention connects the connection maincenter of central control module using photoelectric isolation module as each module, can drop significantly
Low signal-to-noise ratio improves the reliability of route selection result, reduces the wrong report probability of line selection apparatus；
2, the present invention realizes service personnel by remote management of CPE-central control unit-practical operation module linearly connected
Long-range control to faulty line, substantially reduces the Fault Isolation time, improves the speed of Fault Isolation, and the circuit of raising is set
The reliable shape of received shipment row and safety.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is system structure diagram of the invention.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
A kind of microcomputer line selection device for low current, as shown in Figure 1, include signal acquisition module, filter module, alarm module,
Remote administration terminal, photoelectric isolation module, display module, practical operation module, power module, record storage and central control module,
The signal acquisition module is connect with filter module, and filter circuit connects central control module by photoelectric isolation module, described
Remote administration terminal is connect by signal transmission module with photoelectric isolation module, and the practical operation module is connected by photoelectric isolation module
Central control module is connect, the display module, power module and record storage module connect central control module.
The signal acquisition module includes voltage signal acquisition unit and current signal acquisition unit, and the voltage signal is adopted
Integrate unit as zero sequential potential transformer, the high frequency of residual voltage when zero sequential potential transformer is used to acquire distribution system failure is believed
Number, the current signal acquisition unit is zero sequence current mutual inductor, and zero sequence current mutual inductor is for when acquiring distribution system failure
The high-frequency signal of each route zero-sequence current, the signal acquisition module connect central control module by filter module；
The filter module is used to carry out signal acquisition module residual voltage signal collected and zero sequence current signal
Digital filtering eliminates interference, improves the accuracy of signal transmission, is transmitted to center control mould by the signal that filter module is handled
Block, the central control module compared with the high-frequency signal of residual voltage carries out analysis, select current phase phase to zero-sequence current
Anti- and amplitude maximum route, the route are the route that one-way earth fault occurs；
The power module is the power supply of microcomputer line selection device for low current；
The photoelectric isolation module include photoelectric isolating circuit and connect with photoelectric isolating circuit it is silicon-controlled, photoelectricity every
From module as the maincenter between central control module and each module, signal-to-noise ratio can be substantially reduced, that improves route selection result can
By property；
The display module is connect with central control module, and display module is used to show the position that one-way earth fault occurs
Information includes timing unit in display module, and after central control module transmits warning message to display module, timing unit is opened
Beginning timing, while central control module controls alarm module alert, personnel convenient to overhaul are being not timely received letter
Abort situation and time of failure can be quickly determined when breath；
The record storage module is used to record time and the location information of each central control module alert,
Personnel's later period convenient to overhaul transfers record and analysis fault message；
If the practical operation module includes the dry run contact being mounted on each route, can be connected by control operation contact
Connect or disconnect faulty line, to realize that failure removal and signal return, the practical operation module by output board card and photoelectricity every
It is connected from module, photoelectric isolation module is connect with central control module；
The remote administration terminal is connect by signal transmission module with central control module, the remote administration terminal packet
Control unit, monitoring unit and terminal speech communication unit are included, the monitoring unit is used to receive central control module upload
Location information occurs for one-way earth fault, and described control unit is used to issue control command, center control to central control system
Module controls corresponding operation contact in practical operation module according to the control command and returns to carry out failure removal and signal, thus real
The now purpose of long-range isolated fault, improves the speed of Fault Isolation, the reliable shape and safety of the circuit arrangement operation of raising,
The acousto-optic warning unit is used for the sending when location information occurs for the one-way earth fault for receiving central control module sending
Sound-light alarm reminds service personnel to check concrete condition；
It further include terminal speech communication unit in the remote administration terminal, it is logical that the central control module is connected with voice
Module is interrogated, it can be between remote administration terminal and central control module by terminal speech communication unit and speech communication module
Speech communication connection is established, facilitates the staff of two o'clock to carry out timely voice and links up, facilitate the smooth of line maintenance process
It carries out.
The present invention improves the accuracy of device route selection, reduces the probability of wrong report, to alleviate the work of service personnel
It measures, the present invention, which can also be realized, carries out long-range isolation control to faulty line, improves Fault Isolation speed, substantially reduces
The Fault Isolation time.
Above content is only to structure of the invention example and explanation, affiliated those skilled in the art couple
Described specific embodiment does various modifications or additions or is substituted in a similar manner, without departing from invention
Structure or beyond the scope defined by this claim, is within the scope of protection of the invention.
Claims (6)
1. a kind of microcomputer line selection device for low current, which is characterized in that including signal acquisition module, filter module, alarm module, remote
Thread management terminal, photoelectric isolation module, display module, practical operation module, power module, record storage and central control module, institute
It states signal acquisition module to connect with filter module, filter circuit connects central control module by photoelectric isolation module, described remote
Thread management terminal is connect by signal transmission module with photoelectric isolation module, and the practical operation module is connected by photoelectric isolation module
Central control module, the display module, power module and record storage module connect central control module；
The signal acquisition module includes voltage signal acquisition unit and current signal acquisition unit, the voltage signal acquisition list
High-frequency signal of the member for residual voltage when acquiring distribution system failure, the current signal acquisition unit is for acquiring distribution
The high-frequency signal of each route zero-sequence current when the system failure, the signal acquisition module connect center control mould by filter module
Block；
The filter module is used to signal acquisition module residual voltage signal collected and zero sequence current signal carrying out number
Interference is eliminated in filtering, is transmitted to central control module by the signal that filter module is handled, the central control module is to zero sequence
Electric current selects current phase on the contrary and the route of amplitude maximum is as hair compared with the high-frequency signal of residual voltage carries out analysis
The route of raw one-way earth fault；
The power module is the power supply of microcomputer line selection device for low current；
The photoelectric isolation module includes photoelectric isolating circuit and connect silicon-controlled, Phototube Coupling mould with photoelectric isolating circuit
Block can substantially reduce signal-to-noise ratio as the connection maincenter between central control module and each module, and that improves route selection result can
By property；
If the practical operation module includes the dry run contact being mounted on each route, by control operation contact can connect or
Faulty line is disconnected, to realize that failure removal and signal return, the practical operation module passes through output board card and Phototube Coupling mould
Block connection, photoelectric isolation module are connect with central control module；
The remote administration terminal is connect by signal transmission module with central control module, and the remote administration terminal includes control
Unit, monitoring unit and terminal speech communication unit processed, the monitoring unit are used to receive the unidirectional of central control module upload
Location information occurs for ground fault, and described control unit is used to issue control command, central control module to central control system
Corresponding operation contact in practical operation module is controlled according to the control command to return to carry out failure removal and signal.
2. a kind of microcomputer line selection device for low current according to claim 1, which is characterized in that the voltage signal acquisition list
Member is zero sequential potential transformer, and the current signal acquisition unit is zero sequence current mutual inductor.
3. a kind of microcomputer line selection device for low current according to claim 1, which is characterized in that the display module and center
Control module connection, display module are used to show the location information that one-way earth fault occurs, and include timing list in display module
Member, after central control module transmits warning message to display module, timing unit starts timing, while central control module control
Alarm module alert processed.
4. a kind of microcomputer line selection device for low current according to claim 1, which is characterized in that the record storage module is used
In the time and location information that record each central control module alert.
5. a kind of microcomputer line selection device for low current according to claim 1, which is characterized in that the acousto-optic warning unit is used
In issuing sound-light alarm when location information occurs for the one-way earth fault for receiving central control module sending, to remind maintenance
Personnel inspection concrete condition.
6. a kind of microcomputer line selection device for low current according to claim 1, which is characterized in that in the remote administration terminal
It further include terminal speech communication unit, the central control module is connected with speech communication module, is communicated by terminal speech single
Member and speech communication module can establish speech communication connection between remote administration terminal and central control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898472.1A CN109061383A (en) | 2018-08-08 | 2018-08-08 | A kind of microcomputer line selection device for low current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898472.1A CN109061383A (en) | 2018-08-08 | 2018-08-08 | A kind of microcomputer line selection device for low current |
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| Publication Number | Publication Date |
|---|---|
| CN109061383A true CN109061383A (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810898472.1A Pending CN109061383A (en) | 2018-08-08 | 2018-08-08 | A kind of microcomputer line selection device for low current |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201590658U (en) * | 2010-01-21 | 2010-09-22 | 保定市创新恒瑞测控有限公司 | Grounding wire selecting device of microcomputer low current system |
| CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
| CN204287384U (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | A kind of microcomputer type small current earthing wire-selecting control device |
| CN106249102A (en) * | 2016-07-22 | 2016-12-21 | 安徽亚辉电气自动化有限公司 | A kind of Small Electric Current Earthing And Routing Device for medium voltage distribution network |
| KR101774562B1 (en) * | 2017-06-12 | 2017-09-19 | 김점주 | Apparatus for watching fault of overhead power distribution line |
| CN206546405U (en) * | 2017-02-16 | 2017-10-10 | 保定市新海电气有限公司 | New small current system is grounded microcomputer line selection apparatus |
-
2018
- 2018-08-08 CN CN201810898472.1A patent/CN109061383A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201590658U (en) * | 2010-01-21 | 2010-09-22 | 保定市创新恒瑞测控有限公司 | Grounding wire selecting device of microcomputer low current system |
| CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
| CN204287384U (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | A kind of microcomputer type small current earthing wire-selecting control device |
| CN106249102A (en) * | 2016-07-22 | 2016-12-21 | 安徽亚辉电气自动化有限公司 | A kind of Small Electric Current Earthing And Routing Device for medium voltage distribution network |
| CN206546405U (en) * | 2017-02-16 | 2017-10-10 | 保定市新海电气有限公司 | New small current system is grounded microcomputer line selection apparatus |
| KR101774562B1 (en) * | 2017-06-12 | 2017-09-19 | 김점주 | Apparatus for watching fault of overhead power distribution line |
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Application publication date: 20181221 |
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