CN206195473U - Join in marriage electric network line earth fault isolated system based on no source protection - Google Patents
Join in marriage electric network line earth fault isolated system based on no source protection Download PDFInfo
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- CN206195473U CN206195473U CN201621293195.4U CN201621293195U CN206195473U CN 206195473 U CN206195473 U CN 206195473U CN 201621293195 U CN201621293195 U CN 201621293195U CN 206195473 U CN206195473 U CN 206195473U
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- earth fault
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Locating Faults (AREA)
Abstract
The utility model provides a join in marriage electric network line earth fault isolated system based on no source protection, join in marriage electric network line earth fault isolated system based on no source protection sets up in near intelligence switch, gather sensing device and isolation control device including the distributing type, sensing device is gathered including getting the electric coil to the distributing type, and with get current sensor and first short distance radio communication chip that the electric coil electricity is connected, current sensor with first short distance radio communication chip electric connection, the isolation control device includes power module, and with treater, second short distance radio communication chip that the power module electricity is connected, the treater with second short distance radio communication chip electric connection, first short distance radio communication chip with second short distance radio communication chip communication connection, second short distance radio communication chip still with intelligence switch communication connection. This system can control opening and shutting of intelligence switch fast, keeps apart earth fault fast.
Description
Technical field
The utility model is related to ground fault detection technical field, more particularly to a kind of distribution netting twine based on passive protection
Road earth fault shielding system.
Background technology
The most of power distribution networks of China use neutral point non-direct grounding system, i.e. small current neutral grounding system, low current to connect
The single-phase earth fault line selection and positioning of ground system are all the time the problems that each power supply department compares headache, and someone even recognizes
For it is a global problem.Because supply network is complicated and changeable in power distribution network, the difficulty of ground connection positioning is further increased, led
Cause the accuracy of existing single-phase grounded malfunction in grounded system of low current detection very low (20%~30%).So far many power supplies
Door is still determining failure outlet using open line method, manually makes an inspection tour method to search trouble point.So can both cause large area user
The interruption of power supply, also consumes the substantial amounts of manpower and materials of power department.Although during generation singlephase earth fault, it is impossible to form small resistance
Resistance to shorting, is not influenceed to the continuous power supply of load, therefore need not trip immediately, but the phase voltage of non-faulting phase can be caused to raise, long
Time operation just easily makes failure propagation short-circuit into or multipoint earthing at 2 points, and arc grounding can also cause total system overvoltage, and then
Damage equipment, destroys system safety operation.
In recent years, with Distribution Automation Technology research and application deepen continuously, the application of Intellectualized Switchgear is continuous
Increase, line fault monitoring technology level and products thereof service quality level is also improved constantly, and Intellectualized Switchgear is in power distribution network
Application in the middle of circuit is also more and more extensive.At this stage, many intelligent switch have been provided with three distant functions, can enter from remote system
Row control, it is not necessary to carry out artificial operation to scene, but its operating process is tediously long.
Utility model content
Based on this, it is necessary to provide a kind of distribution network line based on passive protection that can quickly isolate earth fault and connect
Earth fault shielding system.
A kind of distribution network line earth fault shielding system based on passive protection, the power distribution network based on passive protection
Line-to-ground fault shielding system is arranged near intelligent switch, including distributed capture sensing device and isolation control device；
The distributed capture sensing device includes electricity taking coil, and the current sensor electrically connected with the electricity taking coil
And the first short-distance wireless communication chip；The current sensor is electrically connected with the first short-distance wireless communication chip；
The isolation control device includes power module, and processor, the second short distance electrically connected with the power module
Wireless communication chips；The processor is electrically connected with the second short-distance wireless communication chip；
The first short-distance wireless communication chip is connected with the second short-distance wireless communication chip communication；Described second is short
Also communicated to connect with the intelligent switch away from wireless communication chips.
Wherein in one embodiment, the distributed capture sensing device also includes clock synchronizer；The clock is same
Step device is electrically connected with the electricity taking coil and the current sensor.
Wherein in one embodiment, the clock synchronizer is gps clock synchronizer.
Wherein in one embodiment, the distributed capture sensing device also includes electric-field sensor；The electric field is passed
Sensor is electrically connected with the first short-distance wireless communication chip and the electricity taking coil.
Wherein in one embodiment, the current sensor is current transformer.
Wherein in one embodiment, the processor includes adder and the comparator electrically connected with the adder；
The adder is passed by the second short-distance wireless communication chip and the first short-distance wireless communication chip with the electric current
Sensor is communicated to connect；The comparator is communicated to connect by the second short-distance wireless communication chip with the intelligent switch.
Wherein in one embodiment, the power module is powered using solar panels way to take power.
Wherein in one embodiment, the power module includes rechargeable battery.
Wherein in one embodiment, the distributed capture sensing device is arranged at the distribution between two power tower bars
On netting twine road；The isolation control device is arranged on power tower bar.
Wherein in one embodiment, also including the intelligent switch, the intelligent switch is arranged on power tower bar.
Because the above-mentioned distribution network line earth fault shielding system based on passive protection is arranged near intelligent switch, bag
Include distributed capture sensing device and isolation control device；Distributed capture sensing device and isolation control device are short by first
Connected away from wireless communication chips and the second short-distance wireless communication chip communication.Therefore, adopted to distribution in wind control device
The transient current signal of collection sensing device collection carries out traditional earth fault and judges, and will determine that result turns by traditional approach
Turn to after control instruction, rapidly control instruction can be sent to intelligent switch by the second short-distance wireless communication chip,
So as to rapidly control the folding of intelligent switch, earth fault is quickly isolated.
Brief description of the drawings
Fig. 1 is the structural representation of the distribution network line earth fault shielding system based on passive protection of an embodiment；
Fig. 2 is the structural representation of the distribution network line earth fault shielding system based on passive protection of another embodiment
Figure；
Fig. 3 is an application scenarios of the distribution network line earth fault shielding system that the utility model is based on passive protection
Schematic diagram.
Specific embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But, the utility model can come in many different forms
Realize, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to of the present utility model
The understanding of disclosure is more thorough comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with technology of the present utility model is belonged to
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all of combination of one or more related Listed Items.
Fig. 1 is referred to, the distribution network line earth fault shielding system based on passive protection of an embodiment is described to be based on
The distribution network line earth fault shielding system of passive protection is arranged near intelligent switch 300, including distributed capture sensing
Device 100 and isolation control device 200.
The distributed capture sensing device 100 includes electricity taking coil 110, and electrically connects with the electricity taking coil 110
The short-distance wireless communication chip 150 of current sensor 130 and first；The current sensor 130 is logical with first short-distance wireless
Letter chip 150 is electrically connected；
The isolation control device 200 includes power module 210, and the processor electrically connected with the power module 210
230th, the second short-distance wireless communication chip 250；The processor 230 is electrically connected with the second short-distance wireless communication chip 250；
The first short-distance wireless communication chip 150 is communicated to connect with the second short-distance wireless communication chip 250；It is described
Second short-distance wireless communication chip 250 is also communicated to connect with intelligent switch 300.
It is to be appreciated that intelligent switch 300 refers to nearby：With the distance of intelligent switch 300 in short-distance wireless communication chip
Communication efficiency preferably within the scope of scope.
Electricity taking coil 110 uses new, high saturation permalloy material, by the load electricity of distribution network line
Stream, just can realize the automatic electricity getting under low current conditions, so as to be distribution for distributed capture sensing device 100 provides power supply
Other composition devices in formula collection sensing device 100 are powered.Specifically, electricity taking coil 110 and current sensor 130 and first
Short-distance wireless communication chip 150 is electrically connected, so that for the short-distance wireless communication chip 150 of current sensor 130 and first is powered.
Current sensor 130 gathers circuit transient current signal, specifically, including ABC three-phase currents.The current sense
Device 130 is electrically connected with the first short-distance wireless communication chip 150, is controlled so as to the transient current signal of collection is transmitted to isolation
Device processed 200.
Power module 210 can be realized by the way of ability, be that isolation control device 200 provides power supply.Specifically, electricity
Source module 210 is electrically connected with processor 230, the second short-distance wireless communication chip 250, so as to be the short distance of processor 230 and second
Wireless communication chips 250 are powered.
Processor 230 can be passed using existing mode to the electric current received by the second short-distance wireless communication chip 250
The transient current signal of the collection of sensor 130 carries out earth fault judgement.Specifically, the basis by the way of traditional of processor 230
ABC three-phase currents determine zero-sequence current, then the comparative result determination by the way of traditional according to zero-sequence current and predetermined threshold value
Earth fault judged result, the control instruction that breakdown judge result is converted into controlling switch folding, and by the way of traditional
Control instruction is sent to intelligent switch 300 by the second short-distance wireless communication chip 250, so as to rapidly control intelligent switch
300 folding, quickly isolates earth fault.
Due to the above-mentioned distribution network line earth fault shielding system based on passive protection, to be arranged at intelligent switch 300 attached
Closely, including distributed capture sensing device 100 and isolation control device 200；Distributed capture sensing device 100 and isolation control
Device 200 is communicated to connect by the first short-distance wireless communication chip 150 and the second short-distance wireless communication chip 250.Therefore, in wind
Force control device carries out traditional earth fault and judges in the transient current signal gathered to distributed capture sensing device 100,
And will determine that result is converted into after control instruction by traditional approach, can rapidly by control instruction by the second short distance without
Line communication chip 250 is sent to intelligent switch 300, so as to rapidly control the folding of intelligent switch 300, quickly isolates ground connection event
Barrier.
Fig. 2 is referred to, wherein in one embodiment, the distributed capture sensing device 100 also includes clock synchronization
Device 170；The clock synchronizer 170 is electrically connected with the electricity taking coil 110 and the current sensor 130.Clock synchronizer
170 electrically connect with electricity taking coil 110, so that electricity taking coil 110 is powered for clock synchronizer 170.Clock synchronizer 170 with
Current sensor 130 is electrically connected so that the three-phase current synchronization of the collection of current sensor 130, so that being based on passive protection
Distribution network line earth fault shielding system can more accurately isolate earth fault.During in order to reach described in more preferable effect
Clock synchronizer 170 is preferably gps clock synchronizer.
Wherein in one embodiment, the distributed capture sensing device 100 also includes electric-field sensor 190；It is described
Electric-field sensor 190 is electrically connected with the first short-distance wireless communication chip 150 and the electricity taking coil 110.Electric-field sensor
190 electrically connect with electricity taking coil 110, so that electricity taking coil 110 is powered for electric-field sensor 190.Electric-field sensor 190 and
One short-distance wireless communication chip 150 is electrically connected, so as to the electric field data that electric-field sensor 190 is gathered is transmitted to isolation control dress
Put 200.Now, processor 230 using traditional approach to the current sensor that is received by the second short-distance wireless communication chip 250
The transient current signal of 130 collections and the electric field data of the collection of electric-field sensor 190 carry out earth fault judgement.Specifically, locate
Reason device 230 determines zero-sequence current by the way of traditional according to ABC three-phase currents, then according to zero-sequence current by the way of traditional
Determine earth fault judged result with the comparative result of predetermined threshold value and with reference to electric field data, be converted into breakdown judge result
The control instruction of controlling switch folding, and control instruction is passed through into the second short-distance wireless communication chip 250 by the way of traditional
Send to intelligent switch 300, so as to rapidly control the folding of intelligent switch 300, quickly isolate earth fault.
It is to be appreciated that electric field data is also three-phase data, it is also possible to entered by 170 pairs of three-phase datas of clock synchronizer
Row is synchronous.
Wherein in one embodiment, due to the detection for distribution net work earthing fault and positioning, most important signal is just
It is circuit transient current signal, and transient current signal amplitude is low, frequency is high, in order to continue hundreds of amperes of line electricity
In stream, the acquisition duration is only 10~20 milliseconds, high-frequency transient fault electric current of the amplitude less than 1 ampere, current sensor
130 preferably carry out current data collection using the current transformer of high sensitivity, high bandwidth, uniformity high, high noise immunity.I.e.
Current sensor 130 is preferably current transformer.
Wherein in one embodiment, the processor 230 includes adder (not shown) and is electrically connected with the adder
The comparator (not shown) for connecing；The adder by the second short-distance wireless communication chip 250 and first short distance without
Line communication chip 150 is communicated to connect with the current sensor 130；The comparator passes through the second short-distance wireless communication core
Piece 250 is communicated to connect with the intelligent switch 300.The determination of zero-sequence current is realized by adder；Being realized by comparator will
Zero-sequence current determines earth fault judged result with the comparative result of predetermined threshold value.Specifically, when zero-sequence current is more than default threshold
During value, then there is earth fault, now corresponding control instruction is disconnection intelligent switch 300.By piece the chip can be selected will to sentence
Disconnected result is zero-sequence current corresponding with the control instruction for disconnecting intelligent switch 300 more than predetermined threshold value；Result be will determine that not send out
Raw earth fault is corresponding with the control instruction of the intelligent switch 300 that closes.Now, piece selects the input of chip to connect with the output of comparator
Connect, piece selects the output of chip and the second short-distance wireless communication chip 250 to communicate to connect.
Wherein in one embodiment, in order to save electric energy, the power module 210 is supplied using solar panels way to take power
Electricity.Further, in order to ensure isolate control device 200 normal work, the power module 210 also include rechargeable battery.
In this way, when solar panels way to take power fails, by rechargeable battery powered.
Wherein in one embodiment, to further speed up the speed of isolation earth fault, the distributed capture sensing
Device 100 is arranged on the distribution network line between two power tower bars；The isolation control device 200 is arranged at power tower bar
On.
Wherein in one embodiment, also including the intelligent switch 300, the intelligent switch 300 is arranged at power tower
On bar.Further, the speed of earth fault is isolated to further speed up, the distributed capture sensing device 100 is arranged at
On distribution network line between two power tower bars；The isolation control device 200 is arranged on power tower bar.
To further illustrate technique effect, Fig. 3 is please referred to, when section 3 occurs earth fault, installed in electric power bar
The distributed capture sensing device 100 of tower 20 collects earth-fault current, electric field data, installed in the isolation of electric force pole tower 20
Control device 200 combines electric field data by synthesizing zero-sequence current, judges earth fault, and logical by short-distance wireless
Letter chip sends instruction to (or neighbouring) intelligent switch 300 installed in electric force pole tower 20, and controlling switch disconnects；Installed in bar
The distributed capture sensing device 100 of tower 30 collects earth-fault current, electric field data, installed in the Fault Isolation of shaft tower 30
Device combines electric field data by synthesizing zero-sequence current, judges earth fault, and give by short-distance wireless communication chip
Instruction is sent installed in (or neighbouring) intelligent switch 300 of electric force pole tower 30, control intelligent switch 300 disconnects；When being arranged on
After electric force pole tower 20 disconnects with the intelligent switch 300 of electric force pole tower 30, realize that the earth fault of section 3 is quickly isolated, and area
Section 1, section 2, section 4 will not be powered off, and now, operation maintenance personnel targeted can must carry out failure and patrol and examine O＆M to section 3.
Above example only expresses several embodiments of the present utility model, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the utility model the scope of the claims can not be interpreted as.It should be pointed out that for the ordinary skill of this area
For personnel, without departing from the concept of the premise utility, multiple deformations can also be made and improved, these belong to this
The protection domain of utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of distribution network line earth fault shielding system based on passive protection, it is characterised in that described based on passive guarantor
The distribution network line earth fault shielding system of shield is arranged near intelligent switch, including distributed capture sensing device and isolation
Control device；
The distributed capture sensing device includes electricity taking coil, and the current sensor that is electrically connected with the electricity taking coil and the
One short-distance wireless communication chip；The current sensor is electrically connected with the first short-distance wireless communication chip；
The isolation control device includes power module, and processor, the second short-distance wireless electrically connected with the power module
Communication chip；The processor is electrically connected with the second short-distance wireless communication chip；
The first short-distance wireless communication chip is connected with the second short-distance wireless communication chip communication；Second short distance without
Line communication chip is also communicated to connect with the intelligent switch.
2. the distribution network line earth fault shielding system based on passive protection according to claim 1, it is characterised in that
The distributed capture sensing device also includes clock synchronizer；The clock synchronizer and the electricity taking coil and the electric current
Sensor is electrically connected.
3. the distribution network line earth fault shielding system based on passive protection according to claim 2, it is characterised in that
The clock synchronizer is gps clock synchronizer.
4. the distribution network line earth fault shielding system based on passive protection according to claim 1-3 any one,
Characterized in that, the distributed capture sensing device also includes electric-field sensor；The electric-field sensor is short with described first
Electrically connected away from wireless communication chips and the electricity taking coil.
5. the distribution network line earth fault shielding system based on passive protection according to claim 1, it is characterised in that
The current sensor is current transformer.
6. the distribution network line earth fault shielding system based on passive protection according to claim 1, it is characterised in that
The processor includes adder and the comparator electrically connected with the adder；The adder by second short distance without
Line communication chip and the first short-distance wireless communication chip are communicated to connect with the current sensor；The comparator passes through institute
The second short-distance wireless communication chip is stated to be communicated to connect with the intelligent switch.
7. the distribution network line earth fault shielding system based on passive protection according to claim 1, it is characterised in that
The power module is powered using solar panels way to take power.
8. the distribution network line earth fault shielding system based on passive protection according to claim 7, it is characterised in that
The power module includes rechargeable battery.
9. the distribution network line earth fault shielding system based on passive protection according to claim 1, it is characterised in that
The distributed capture sensing device is arranged on the distribution network line between two power tower bars；The isolation control device sets
It is placed on power tower bar.
10. the distribution network line earth fault shielding system based on passive protection according to claim 1, its feature exists
In also including the intelligent switch, the intelligent switch is arranged on power tower bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621293195.4U CN206195473U (en) | 2016-11-29 | 2016-11-29 | Join in marriage electric network line earth fault isolated system based on no source protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621293195.4U CN206195473U (en) | 2016-11-29 | 2016-11-29 | Join in marriage electric network line earth fault isolated system based on no source protection |
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| Publication Number | Publication Date |
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| CN206195473U true CN206195473U (en) | 2017-05-24 |
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ID=58725066
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621293195.4U Active CN206195473U (en) | 2016-11-29 | 2016-11-29 | Join in marriage electric network line earth fault isolated system based on no source protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167708A (en) * | 2017-06-28 | 2017-09-15 | 北京盈拓润达电气科技有限公司 | A kind of fault detection method, device, equipment and storage medium |
| CN109474005A (en) * | 2018-10-27 | 2019-03-15 | 嘉兴市恒创电力设备有限公司 | It is a kind of can two-way detection the grid-connected switch of novel intelligent distributed generation resource |
-
2016
- 2016-11-29 CN CN201621293195.4U patent/CN206195473U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167708A (en) * | 2017-06-28 | 2017-09-15 | 北京盈拓润达电气科技有限公司 | A kind of fault detection method, device, equipment and storage medium |
| CN109474005A (en) * | 2018-10-27 | 2019-03-15 | 嘉兴市恒创电力设备有限公司 | It is a kind of can two-way detection the grid-connected switch of novel intelligent distributed generation resource |
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