CN108008234A - Single-phase earthing defends managing device - Google Patents
Single-phase earthing defends managing device Download PDFInfo
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- CN108008234A CN108008234A CN201711107624.3A CN201711107624A CN108008234A CN 108008234 A CN108008234 A CN 108008234A CN 201711107624 A CN201711107624 A CN 201711107624A CN 108008234 A CN108008234 A CN 108008234A
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- signal
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- phase
- judgment module
- plc controller
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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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Abstract
The invention discloses a kind of single-phase earthing to defend managing device, is related to distribution control technology field.Managing device, including detection device and three-phase circuit are defendd including single-phase earthing；It is characterized in that：Detection device includes PLC controller, detecting signal unit, judgment module and communication module；Detecting signal unit is connected with judgment module；The judgment module other end is connected with PLC controller；PLC controller is connected with protection module and communication module respectively；PLC controller is connected by communication module with terminal device；Terminal device is connected with alarm unit.The present invention detects residual voltage or zero sequence current signal in real time by setting signal detection module, and judge zero-sequence current direction so as to failure judgement phase by judgment module, fault-signal is transmitted to by terminal device by communication module in real time, staff is facilitated to be safeguarded in real time to transmission line of electricity, Breakdown Maintenance efficiency is improved, avoids power-off from causing economic loss.
Description
Technical field
The invention belongs to distribution control technology field, and managing device is defendd more particularly to single-phase earthing.
Background technology
With the development and the improvement of people's living standards of economic technology, electric energy has become in people's production and life
Essential secondary energy sources.Therefore, the stabilization and persistently become one of primary goal of operation of power networks that electric energy is supplied.
Meanwhile with the development of economic technology, China's power grid has also come into big Internet age, all types of regional power grids
Having interconnected becomes the bulk power grid of national property.But operation of power networks impossible complete failure-free operation in operation, therefore
Just become the most important hand for ensureing power grid security even running for the Fast Identification of failure, positioning and processing in operation of power networks
One of section.
Singlephase earth fault be one of most common failure of network system due to barrier, distribution line insulator breakdown,
There is singlephase earth fault often in factors, the power grid such as single-phase wire break or toy harm.Singlephase earth fault not only shadow
The normal power supply of user has been rung, and there may be overvoltage, has burnt out equipment, or even cause phase fault and expand accident.Cause
This, for the failure phase of singlephase earth fault Fast Identification it is particularly important that..
The content of the invention
It is an object of the invention to provide single-phase earthing to defend managing device, is detected in real time by setting signal detection module
Residual voltage or zero sequence current signal, and judge that zero-sequence current direction so as to failure judgement phase, passes through communication by judgment module
Fault-signal is transmitted to terminal device by module in real time, facilitates staff to be safeguarded in real time to transmission line of electricity, improves failure
Maintenance efficiency, avoids power-off from causing economic loss.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention for single-phase earthing defend managing device, including single-phase earthing defence managing device, including detection device and
Three-phase circuit；It is characterized in that：The detection device includes PLC controller, detecting signal unit, judgment module and communication mould
Block；The detecting signal unit is connected with judgment module；The judgment module other end is connected with PLC controller；The PLC controls
Device processed is connected with protection module and communication module respectively；The PLC controller is connected by communication module with terminal device；It is described
Terminal device is connected with alarm unit.
Further, the detecting signal unit is used for the voltage signal and current transformer for detecting voltage transformer sensing
The current signal of sensing, when singlephase earth fault occurs for three-phase circuit, neutral point excursion, three-phase becomes asymmetric, produces zero
Sequence electric current and residual voltage.
Further, the judgment module is sensed by the voltage signal for sensing voltage transformer with current transformer
Current signal is contrasted, it is determined whether singlephase earth fault occurs, and by judging the direction of zero-sequence current, is believed by interlocking
Number failure phase signals are transmitted to PLC controller.
Further, the communication module includes zigbee short-distance wireless communications or GPRS telecommunications, works as judgment module
When judging to occur singlephase earth fault, PLC controller transmits a signal to terminal device by communication module.
Further, the terminal device includes computer or Intelligent flat, when terminal device receives detection device transmission
Control signal when, real time terminal equipment control alarm unit send alarm, staff goes to maintenance.
Singlephase earth fault determination methods, comprise the following steps：
The first step：Signal monitoring
The monitoring device is installed in substation, and the signal detection module is in real time to voltage transformer and Current Mutual Inductance
Device carries out signal monitoring, and when singlephase earth fault occurs, three-phase circuit neutral point shifts, and produces zero-sequence current and zero sequence
Voltage is detected by signal detection module；
Second step：Breakdown judge
When signal detection module detects zero-sequence current and residual voltage signal, judgment module is transmitted a signal to, institute
State judgment module and carry out determining whether singlephase earth fault, failure phase with residual voltage signal by comparing zero sequence current signal
Zero-sequence current direction with other phase directions on the contrary, by interlocking signal so as to failure judgement phase；
3rd step：Troubleshooting
When judgment module judges to occur singlephase earth fault, signal is transmitted to by the judgment module by communication module
Terminal device, the terminal device control alarm unit send alarm.
The invention has the advantages that：
The present invention detects residual voltage or zero sequence current signal in real time by setting signal detection module, and by judging mould
Block judges that fault-signal so as to failure judgement phase, is transmitted to terminal device, side by zero-sequence current direction in real time by communication module
Just staff in real time safeguards transmission line of electricity, improves Breakdown Maintenance efficiency, avoids power-off from causing economic loss.
Certainly, implement any of the products of the present invention and do not necessarily require achieving all the advantages described above at the same time.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, embodiment will be described below required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present 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 the structure diagram that single-phase earthing proposed by the present invention defends managing device；
Fig. 2 is three-phase circuit schematic diagram.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment 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, belongs to the scope of protection of the invention.
In the description of the present invention, it is to be understood that term " perforate ", " on ", " under ", " thickness ", " top ", " in ",
Indicating position or the position relationship such as " length ", " interior ", " surrounding ", are for only for ease of the description present invention and simplify description, without
It is that the component of instruction or hint meaning or element must have specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
Please refer to Fig.1 shown in -2, the present invention defends managing device, including single-phase earthing defence management for a kind of single-phase earthing
Device, including detection device and three-phase circuit；It is characterized in that：Detection device includes PLC controller, detecting signal unit, sentences
Disconnected module and communication module；Detecting signal unit is connected with judgment module；The judgment module other end is connected with PLC controller；PLC
Controller is connected with protection module and communication module respectively；PLC controller is connected by communication module with terminal device；Terminal is set
It is standby to be connected with alarm unit.
Wherein, detecting signal unit is used for the electricity for the voltage signal and current transformer sensing for detecting voltage transformer sensing
Flow signal, when singlephase earth fault occurs for three-phase circuit, neutral point excursion, three-phase becomes asymmetric, produce zero-sequence current and
Residual voltage.
Wherein, the current signal that judgment module is sensed by the voltage signal for sensing voltage transformer with current transformer
Contrasted, it is determined whether singlephase earth fault occurs, and by judging the direction of zero-sequence current, by interlocking signal by failure
Phase signals are transmitted to PLC controller.
Wherein, communication module includes zigbee short-distance wireless communications or GPRS telecommunications, when judgment module judges to set out
During raw singlephase earth fault, PLC controller transmits a signal to terminal device by communication module.
Wherein, terminal device includes computer or Intelligent flat, when terminal device receives the control letter of detection device transmission
Number when, real time terminal equipment control alarm unit send alarm, staff goes to maintenance.
Singlephase earth fault determination methods, comprise the following steps：
The first step：Signal monitoring
Monitoring device is installed in substation, and signal detection module carries out letter to voltage transformer and current transformer in real time
Number monitoring, when singlephase earth fault occurs, three-phase circuit neutral point shifts, generation zero-sequence current and residual voltage believed
Number detection module detects；
Second step：Breakdown judge
When signal detection module detects zero-sequence current and residual voltage signal, judgment module is transmitted a signal to, is sentenced
Disconnected module determine whether singlephase earth fault by comparing zero sequence current signal and residual voltage signal, the zero of failure phase
Sequence current direction is with other phase directions on the contrary, by interlocking signal so as to failure judgement phase；
3rd step：Troubleshooting
When judgment module judges to occur singlephase earth fault, signal is transmitted to terminal by judgment module by communication module
Equipment, terminal device control alarm unit send alarm.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
At least one implementation of the present invention is contained in reference to the embodiment or example particular features, structures, materials, or characteristics described
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can close in any one or more embodiments or example
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help and illustrates the present invention.Preferred embodiment is not detailed
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is in order to preferably explain the present invention
Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and its four corner and equivalent.
Claims (6)
1. single-phase earthing defends managing device, including detection device and three-phase circuit；It is characterized in that：The detection device includes
PLC controller, detecting signal unit, judgment module and communication module；
The detecting signal unit is connected with judgment module；The judgment module other end is connected with PLC controller；The PLC
Controller is connected with protection module and communication module respectively；
The PLC controller is connected by communication module with terminal device；The terminal device is connected with alarm unit.
2. single-phase earthing according to claim 1 defends managing device, it is characterised in that the detecting signal unit is used for
Detect the voltage signal of voltage transformer sensing and the current signal of current transformer sensing.
3. single-phase earthing according to claim 1 defends managing device, it is characterised in that the judgment module is by by electricity
The current signal that transformer induced voltage signal senses with current transformer is pressed to be contrasted, it is determined whether single-phase earthing occurs
Failure.
4. single-phase earthing according to claim 1 defends managing device, it is characterised in that the communication module includes
Zigbee short-distance wireless communications or GPRS telecommunications.
5. single-phase earthing according to claim 1 defends managing device, it is characterised in that the terminal device includes computer
Or Intelligent flat.
6. the singlephase earth fault determination methods as described in claim 1-5 is any one, it is characterised in that comprise the following steps：
The first step：Signal monitoring
The monitoring device be installed on substation in, the signal detection module in real time to voltage transformer and current transformer into
Row signal monitoring, when singlephase earth fault occurs, three-phase circuit neutral point shifts, and produces zero-sequence current and residual voltage
Detected by signal detection module；
Second step：Breakdown judge
When signal detection module detects zero-sequence current and residual voltage signal, judgment module is transmitted a signal to, it is described to sentence
Disconnected module carries out determining whether singlephase earth fault by comparing zero sequence current signal with residual voltage signal, is believed by interlocking
Number so as to failure judgement phase；
3rd step：Troubleshooting
When judgment module judges to occur singlephase earth fault, signal is transmitted to terminal by the judgment module by communication module
Equipment, the terminal device control alarm unit send alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107624.3A CN108008234A (en) | 2017-11-10 | 2017-11-10 | Single-phase earthing defends managing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107624.3A CN108008234A (en) | 2017-11-10 | 2017-11-10 | Single-phase earthing defends managing device |
Publications (1)
| Publication Number | Publication Date |
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| CN108008234A true CN108008234A (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711107624.3A Pending CN108008234A (en) | 2017-11-10 | 2017-11-10 | Single-phase earthing defends managing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199342A (en) * | 2016-09-20 | 2016-12-07 | 西安科技大学 | A kind of wire selection method for power distribution network single phase earthing failure |
| 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 |
| CN106646120A (en) * | 2016-11-25 | 2017-05-10 | 国网江苏省电力公司扬州供电公司 | Distribution network small resistance single phase grounding fault positioning method and power distribution terminal |
| CN206235698U (en) * | 2016-10-28 | 2017-06-09 | 国家电网公司 | A kind of electric network single-phase earth fault differentiates, isolates and resultant fault anticipation device |
| CN106950465A (en) * | 2017-04-12 | 2017-07-14 | 山东科技大学 | A kind of mine low voltage electric network electric leakage pick method and system |
-
2017
- 2017-11-10 CN CN201711107624.3A patent/CN108008234A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106199342A (en) * | 2016-09-20 | 2016-12-07 | 西安科技大学 | A kind of wire selection method for power distribution network single phase earthing failure |
| CN206235698U (en) * | 2016-10-28 | 2017-06-09 | 国家电网公司 | A kind of electric network single-phase earth fault differentiates, isolates and resultant fault anticipation device |
| CN106646120A (en) * | 2016-11-25 | 2017-05-10 | 国网江苏省电力公司扬州供电公司 | Distribution network small resistance single phase grounding fault positioning method and power distribution terminal |
| CN106950465A (en) * | 2017-04-12 | 2017-07-14 | 山东科技大学 | A kind of mine low voltage electric network electric leakage pick method and system |
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Application publication date: 20180508 |
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