CN205880120U - Distribution network positioning device based on zero sequence current detects - Google Patents
Distribution network positioning device based on zero sequence current detects Download PDFInfo
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- CN205880120U CN205880120U CN201620886491.9U CN201620886491U CN205880120U CN 205880120 U CN205880120 U CN 205880120U CN 201620886491 U CN201620886491 U CN 201620886491U CN 205880120 U CN205880120 U CN 205880120U
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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
Abstract
The utility model discloses a distribution network positioning device based on zero sequence current detects is provided with and joins in marriage electric network line fault indicator, is provided with transmission control system, micropower wireless transmission circuit and monitoring devices in joining in marriage electric network line fault indicator, and monitoring devices is connected with micropower wireless transmission circuit, and micropower wireless transmission circuit connects transmission control system, be provided with electron mutual -inductor, monitor cell, processing unit and transmission unit in the monitoring devices, monitor cell is connected to the electron mutual -inductor, and monitor cell connects processing unit, and processing unit is connected with micropower wireless transmission circuit through the transmission unit, can monitoring wire way operating parameter, detect all kinds of short circuits, earth fault to be equipped with for sending monitor information and fault detection data on the backstage (joining in marriage the electric network line fault handling main website).
Description
Technical field
This utility model relates to technical field of power systems, specifically, is that power distribution network based on zero-sequence current detection is fixed
Position equipment.
Background technology
Along with the beginning of " 13 ", the fast development of power distribution network scale and Distribution Network Equipment prescription rapid
Promoting, the distribution various information possessing using value is wider, type is more, density is bigger, precision is higher.For a long time,
Grid company is continued to use the periodic inspection system of poor efficiency always and is overhauled Distribution Network Equipment and the repairing of passive type, and causing should
Repair hidden danger equipment missing inspection to repair, have impact on its technical performance and service life, serious in the case of can cause fault or accident, impact
Power supply reliability.Power distribution network management there is also circuit running status and grasps fine not, line fault and search that difficulty is big, passive type
Service does not meets development trend Three Difficult Issues.Based on these demands, in the urgent need to exploitation distribution network equipment state perception and analysis
System, uses and searches the distribution line failure instruction technology of line fault point fast and effectively and power non-faulting sector transfer
Technology, it is achieved to distribution line failure location and isolation；Use the big data analysis of Distribution Network Equipment, auxiliary decision technology, it is achieved
State of electric distribution network assessment, fault diagnosis, the repair based on condition of component work for Distribution Network Equipment provides technical support, thus promotes electrical network enterprise
The economic benefit of industry.
Current Distribution Network Failure localization method mainly has a following two:
First half-wave method: occur in phase voltage based on earth fault that this is it is assumed that now fault phase electricity close to maximum moment
Holding electric charge to be discharged to trouble point by fault phase circuit, faulty line distribution capacity and distributed inductance have damped oscillation characteristic,
This electric current is without arc suppression coil, so the maximum of transient inductance electric current occurs in phase voltage through zero passage corresponding to earth fault
Moment, and fault occurs when phase voltage is close to the moment of maximum, transient inductance electric current is zero.Transient state electric capacity electricity now
Flow ratio transient inductance electric current is much bigger, whether isolated neutral system or resonant earthed system, and fault occurs moment
Transient process is approximately the same.Utilize faulty line transient zero-sequence current and the amplitude of voltage head half-wave and direction all and normal condition
Different features, can realize distribution network failure location.
The shortcoming of first half-wave method is: install and use directional requirement, for ring network power supply, after circuit falls load, former
The direction come is the most wrong.Under thunderbolt state, malfunction rate is high, and accuracy rate is only 30%.
Capacitance current pulse amplitude method: occur in phase voltage close to this hypothesis of maximum moment based on singlephase earth fault
Detect.
1) in the moment of earth fault, there is the transient current that a frequency very amplitude is the biggest, transient current in earth point
The steady-state value of the capacitance current that the Amplitude Ration of component flows through same point is several times greater to tens times；
2) discharged to trouble point by fault phase circuit in ground connection transient fault phase capacitance charge, and faulty line distribution electricity
Appearance, distributed inductance and resistance have Decay Rate to high-frequency transient state component；
3) all flow to faulty line due to the transient current of all non-fault lines, return to the earth through trouble point, cause event
Barrier circuit transient current amplitude maximum between transformer station to trouble point.
Shortcoming: do not support main station system and front end communication, it is impossible to realize failure path simulation, threshold criterion exists and substantially lacks
Falling into, fault alarm accuracy rate only has about 40%, it is impossible to position fault fast and accurately.
Utility model content
The purpose of this utility model is to provide power distribution network location based on zero-sequence current detection equipment, it is possible to monitoring circuit
Operational factor, detects all kinds of short circuit, earth fault, in case for giving monitoring information on backstage (distribution network line fault process main website)
And fault-detection data.
This utility model is achieved through the following technical solutions: power distribution network location based on zero-sequence current detection equipment, arranges
There is distribution network line fault indicator, in distribution network line fault indicator, be provided with transmission control system, micropower is wireless
Transmission circuit and monitoring device, monitoring device is connected with micropower wireless transmission circuit, and micropower wireless transmission circuit connects
Transmission control system.
Further for preferably realizing this utility model, use the following structure that arranges especially: in described monitoring device
Being provided with electric mutual inductor, monitoring means, processing unit and transmission unit, electric mutual inductor connects monitoring means, monitoring means
Connecting processing unit, processing unit is connected with micropower wireless transmission circuit by transmission unit.
Further for preferably realizing this utility model, use the following structure that arranges especially: in described monitoring device
It is additionally provided with intelligent switch, and intelligent switch is connected with processing unit.
Further for preferably realizing this utility model, use the following structure that arranges especially: control system in described transmission
Being provided with indicator clock circuit, consolidation circuit, process circuit, storage circuit and network transmitting unit in system, consolidation circuit divides
Not being connected with micropower wireless transmission circuit and process circuit, indicator clock circuit connection processes circuit, processes circuit even
Connecing storage circuit, storage circuit connects network transmitting unit.
Further for preferably realizing this utility model, the following structure that arranges of employing especially: described network transmitting unit
Employing GPRS network is transmitted.
Further for preferably realizing this utility model, use the following structure that arranges especially: control system in described transmission
The power supply being powered for transmission control system it is additionally provided with in system.
Further for preferably realizing this utility model, use the following structure that arranges especially: described power supply uses
Solaode.
Further for preferably realizing this utility model, use the following structure that arranges especially: described monitoring device is 3
Individual, and be connected with the phase line of three-phase circuit respectively.
This utility model compared with prior art, has the following advantages and beneficial effect:
(1) this utility model can monitor circuit operational factor, detects all kinds of short circuit, earth fault, in case (joining for backstage
Guangdong power system process main website) on send monitoring information and fault-detection data.
(2) this utility model monitoring device divides A, B, C three-phase monitoring device unit, respectively the A in monitoring distribution network line,
B, C three-phase line.Distribution network line fault indicator can quick and precisely identify when line failure that fault zone is the most remote
Pass fault message, substantially reduce trouble shooting time, provide powerful guarantee for rapidly removing faults, recovery normal power supply.
When properly functioning, the operation conditions of power distribution network can be monitored in real time by distribution network line fault indicator, can be power distribution network
The optimization of the method for operation provides and supports.
(3) this utility model has the characteristic that earth fault judging nicety rate is high, and installs and uses non-directional requirement, and
There is the features such as safety in utilization is high.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Detailed description of the invention
It should be noted that this utility model inevitably relates to software program etc. when implementing, but existing
All kinds of software programs of technology (data collection and analysis, contrast, integration etc.) can meet use of the present utility model, and this practicality is new
Software program is not altered and does not the most protect by type, and the hardware configuration simply designed for realizing goal of the invention and function is protected
Protect.
Below in conjunction with embodiment, this utility model is described in further detail, but embodiment of the present utility model is not
It is limited to this.
Embodiment 1:
Power distribution network location based on zero-sequence current detection equipment, it is possible to monitoring circuit operational factor, detects all kinds of short circuit, connects
Earth fault, in case for giving monitoring information and fault-detection data, such as Fig. 1 institute on backstage (distribution network line fault process main website)
Show, use the following structure that arranges especially: be provided with distribution network line fault indicator, set in distribution network line fault indicator
It is equipped with transmission control system, micropower wireless transmission circuit and monitoring device, monitoring device and micropower wireless transmission circuit phase
Connecting, micropower wireless transmission circuit connects transmission control system.
When design uses, owing to distribution network line is large number of, distributed areas are extensive, branched line is many, ruuning situation
Complexity, when breaking down, fault zone is accurately positioned difficulty, causes Distribution Network Failure to process the time longer.And distribution network line fault
Indicator can quick and precisely identify fault zone teletransmission fault message when line failure, substantially reduces fault and looks into
Look for the time, provide powerful guarantee for rapidly removing faults, recovery normal power supply.When properly functioning, pass through distribution network line
Fault detector can monitor the operation conditions of power distribution network in real time, can be that the optimization of the power distribution network method of operation provides support.
Described micropower wireless transmission unit, receives line fault, collection data that monitoring device is uploaded.
Distribution network line fault indicator is made up of monitoring device and transmission control system, and both by micropower without
Line transmission circuit communicates, and distribution network line fault indicator is arranged on distribution line in use, monitoring circuit fortune
Line parameter, detects all kinds of short circuit, earth fault, send monitoring information and fault inspection in case processing to distribution network line fault in main website
Survey data.
Embodiment 2:
The present embodiment is to optimize further on the basis of above-described embodiment, further new for preferably realizing this practicality
Type, as it is shown in figure 1, use especially the following structure that arranges: be provided with in described monitoring device electric mutual inductor, monitoring means,
Processing unit and transmission unit, electric mutual inductor connects monitoring means, and monitoring means connects processing unit, and processing unit is by passing
Defeated unit is connected with micropower wireless transmission circuit.
Described electric mutual inductor, comprises two kinds of current transformer and voltage transformer, high voltage can be become low-voltage,
Big electric current becomes small area analysis, measures for monitoring means and protection controls；
Described monitoring means, according to electric mutual inductor measurement data, monitoring circuit three-phase load electric current, phase electric field intensity,
Operation information and the status informations such as main power supply, back-up source such as fault current, zero-sequence current, residual voltage；
Described processing unit, by monitoring means measurement data, starts definite value, zero-sequence current real component threshold with ground voltage
The set parameter such as value compares, and when measurement data exceedes fault threshold, carries out failure wave-recording, start simultaneously data upload and
Fault Isolation function；
Described transmission unit, the fault-signal sent according to processing unit, fault recorder data, fault message etc. are utilized
Micropower wireless transmission circuit transmits to transmission control system.
Embodiment 3:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as it is shown in figure 1, use the following structure that arranges especially: be additionally provided with intelligent switch, and intelligence in described monitoring device
Switch is connected with processing unit.
Described intelligent switch, the Fault Isolation signal sent according to processing unit, disconnect 10 KV trouble points.
Embodiment 4:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as it is shown in figure 1, use the following structure that arranges especially: be provided with indicator clock electricity in described transmission control system
Road, consolidation circuit, process circuit, storage circuit and network transmitting unit, consolidation circuit respectively with micropower wireless transmission circuit
Being connected with processing circuit, indicator clock circuit connection processes circuit, processes circuit and connects storage circuit, and storage circuit connects
Network transmitting unit.
Described consolidation circuit, for closing the measurement data of 3 phase line uploaded by micropower wireless transmission circuit
And process；
Described process circuit, according to clock synchronization information, merges A, B, C three-phase line measurement data and compares, will
Fault data information record is at storage circuit, and starts network transmitting unit, in order to data be uploaded at distribution line fault
Reason main website；In actual applications, process fault discrimination function and include: one is short circuit and earth fault identification, and self adaptation is born
Charged current size, the initiation value of fault mutation current is preferably not less than 150A, when device detects fault current and this fault current
Quickly disappearing, aftercurrent is less than 5A drift value, device energy in-site collecting fault message, indicates event on the spot with the form of glistening
Barrier, in case distribution line troubleshooting main website can be uploaded to fault message；Two is monitoring circuit three-phase load electric current, phase electric field
The operation information such as intensity, fault current and the status information such as main power supply, back-up source, in case can join delivering in information above
Netting twine road troubleshooting main website, and failure wave-recording can be carried out by distribution line troubleshooting main website；Three is that earth fault differentiates
Adapt to isolated neutral, grounding through arc, through neutral grounding in distribution power network such as low resistance groundings, and different distribution
Net grid structure；Meet the different Earth Fault Detection requirement such as metallic earthing, arc grounding, resistance eutral grounding；Four is to work as circuit
After breaking down, distribution line troubleshooting main website can correctly identify fault type, and can select reset shape according to fault type
Formula；
Described network transmitting unit, for being uploaded to distribution line fault by A, B, C three-phase line fault data after merging
Process main website；Support to give on data timing, load out-of-limit on send, heavy duty sent and actively calls survey together, minimum is sent time interval be
15 seconds；
Described storage circuit, storage processes the fault data of circuit record, when actual Application Design, preferably stores each
Monitoring device preserves electric current, phase electric field intensity fixed-point data, 64 event of failure records and 64 fault recorder datas of 30 days,
And power-off can preserve, fixed-point data is fixed as 1 day 96 point；
Described indicator clock circuit, positions for monitoring device geographical position GPS, and three-phase monitoring means gps clock is same
Step.
Embodiment 5:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as it is shown in figure 1, use the following structure that arranges especially: described network transmitting unit uses GPRS network transmission, is arranging
Time, preferably utilize GPRS network to carry out data transmission, network transmitting unit also can be set to 3G network transmission or 4G network
Transmission；Described GPRS transmission unit (network transmitting unit), for being uploaded to join by A, B, C three-phase line fault data after merging
Netting twine road troubleshooting main website；It supports to give on data timing, load out-of-limit on send, heavy duty sent and actively calls survey together, in minimum
Sending time interval is 15 seconds.
Embodiment 6:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, use the following structure that arranges especially: be additionally provided with in described transmission control system and supply for transmission control system
Electricity power supply, when being set using, power supply will provide for transmission control system needed for running voltage.
Embodiment 7:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as it is shown in figure 1, use the following structure that arranges especially: described power supply uses solaode, it is preferred that power supply
Power supply uses solaode (solar battery cell), and solar battery cell can convert the solar into electric energy and supply
Transmission control system.
Embodiment 8:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as it is shown in figure 1, use especially the following structure that arranges: described monitoring device is 3, and respectively with the phase of three-phase circuit
Line is connected, and is respectively mounted a monitoring device, the most respectively A phase monitoring device, B when design uses in each phase line
Phase monitoring device and C phase monitoring device.
This utility model has the characteristic that earth fault judging nicety rate is high, in phase three-wire three circuit, three-phase current
Phasor and equal to zero, i.e. Ia+Ib+Ic=0.If accessing a current transformer in phase three-wire three, at this moment faradic current is
Zero, when circuit occurs electric shock or leak current fault, loop there is leakage current flow through, at this moment through the three-phase of current transformer
Electric current phasor and not etc. zero, its phasor and be: Ia+Ib+Ic=I (leakage current, i.e. zero-sequence current).Occur single at distribution line
During phase earth fault, the zero-sequence current phase place before and after earth point is contrary.When distribution line generation singlephase earth fault, only
To gather the phase place of the zero-sequence current before and after trouble point respectively and be compared the result drawing opposite in phase, getting final product failure judgement
The railroad section of point.Asymmetric current source makes to flow through the current signal with obvious characteristic on faulty line, hangs on the line
Distribution network line fault pointer detection just can provide indicating fault after this distinctive signal, and therefore this detection mode is not by system
The method of operation, topological structure, the impact of neutral grounding mode, accuracy is up to more than 90%, far above first half-wave method and electricity
Capacitance current pulse amplitude method.
This utility model installs and uses non-directional requirement.Zero-sequence current judges (the distribution network line event of earth fault device
Barrier indicator) non-directional to installing and using, for ring network power supply, after circuit falls load, do not affect its judgement to fault,
Thunderbolt judges that on zero-sequence current the impact of earth fault device is little.
This utility model has the advantages that safety is high, the signal that asymmetric current source produces do not affect transforming plant main transformer,
Properly functioning (being equivalent to a resistive load put into and exit) of ground connection change, arc suppression coil and circuit, asymmetric current source exists
When system is properly functioning completely isolated with a circuit；Simultaneously because the signal that asymmetric current source produces is low frequency purely resistive
, it is also possible to eliminate resonance, over-voltage suppression, reduce the overvoltage harm to power distribution network location equipment.
The above, be only preferred embodiment of the present utility model, and this utility model not does any pro forma limit
System, every according to technical spirit of the present utility model, above example is made any simple modification, equivalent variations, each fall within
Within protection domain of the present utility model.
Claims (8)
1. power distribution network location based on zero-sequence current detection equipment, it is characterised in that: it is provided with distribution network line fault indicator,
Transmission control system, micropower wireless transmission circuit and monitoring device it is provided with, monitoring in distribution network line fault indicator
Device is connected with micropower wireless transmission circuit, and micropower wireless transmission circuit connects transmission control system.
Power distribution network location based on zero-sequence current detection the most according to claim 1 equipment, it is characterised in that: at described prison
Being provided with electric mutual inductor, monitoring means, processing unit and transmission unit in surveying device, electric mutual inductor connects monitoring means,
Monitoring means connects processing unit, and processing unit is connected with micropower wireless transmission circuit by transmission unit.
Power distribution network location based on zero-sequence current detection the most according to claim 2 equipment, it is characterised in that: at described prison
It is additionally provided with intelligent switch in surveying device, and intelligent switch is connected with processing unit.
4. according to power distribution network location based on the zero-sequence current detection equipment described in any one of claim 1-3, it is characterised in that:
Indicator clock circuit, consolidation circuit, process circuit, storage circuit and network transmission it is provided with in described transmission control system
Unit, consolidation circuit is connected with micropower wireless transmission circuit and process circuit respectively, and indicator clock circuit connection processes
Circuit, processes circuit and connects storage circuit, and storage circuit connects network transmitting unit.
Power distribution network location based on zero-sequence current detection the most according to claim 4 equipment, it is characterised in that: described network
Transmission unit uses GPRS network transmission.
6., according to claim 1-3, power distribution network location based on the zero-sequence current detection equipment described in 5 any one, its feature exists
In: in described transmission control system, it is additionally provided with the power supply being powered for transmission control system.
Power distribution network location based on zero-sequence current detection the most according to claim 6 equipment, it is characterised in that: described power supply
Power supply uses solaode.
8. according to claim 1-3, power distribution network location based on the zero-sequence current detection equipment described in 5,7 any one, its feature
It is: described monitoring device is 3, and is connected with the phase line of three-phase circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620886491.9U CN205880120U (en) | 2016-08-16 | 2016-08-16 | Distribution network positioning device based on zero sequence current detects |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620886491.9U CN205880120U (en) | 2016-08-16 | 2016-08-16 | Distribution network positioning device based on zero sequence current detects |
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| CN205880120U true CN205880120U (en) | 2017-01-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109888826A (en) * | 2019-03-08 | 2019-06-14 | 大唐东营发电有限公司 | Electrical energy transportation management method |
| CN114994464A (en) * | 2022-08-01 | 2022-09-02 | 四川中电启明星信息技术有限公司 | Distribution network hidden danger identification method based on generation countermeasure network |
-
2016
- 2016-08-16 CN CN201620886491.9U patent/CN205880120U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109888826A (en) * | 2019-03-08 | 2019-06-14 | 大唐东营发电有限公司 | Electrical energy transportation management method |
| CN114994464A (en) * | 2022-08-01 | 2022-09-02 | 四川中电启明星信息技术有限公司 | Distribution network hidden danger identification method based on generation countermeasure network |
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