CN103336220B - The method and apparatus of distribution network failure being monitored and locating - Google Patents
The method and apparatus of distribution network failure being monitored and locating Download PDFInfo
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- CN103336220B CN103336220B CN201310206871.4A CN201310206871A CN103336220B CN 103336220 B CN103336220 B CN 103336220B CN 201310206871 A CN201310206871 A CN 201310206871A CN 103336220 B CN103336220 B CN 103336220B
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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
Embodiments provide a kind of method and apparatus of distribution network failure being monitored and locating.The method mainly comprises: the distribution line on-line monitoring unit installed in the branch of distribution line judges the short trouble of distribution line according to the load current change of the distribution line detected, the short trouble information of distribution line is sent to power distribution network single-phase grounding comprehensive protecting device and faulted-phase judgment device; Faulted-phase judgment device, based on the criterion information preset, carries out fusion treatment to the short trouble information that distribution line monitoring unit sends over, and obtains the fault location information of short trouble information.The embodiment of the present invention can accurately detect the multiple Distribution Network Failures such as short circuit, open circuit, single-phase earthing, solves distribution network failure all sidedly, does not expand accident, proterctive equipment, reduction human body electrification risk, fast, accurately selects the location of faulty line and trouble spot.
Description
Technical field
The present invention relates to distribution network technology field, particularly relate to a kind of method and apparatus of distribution network failure being monitored and locating.
Background technology
Electric system is the basic industry of national economy, and along with expanding economy, the scale of electric system constantly expands, and the requirement of people to electric service, the quality of power supply is more and more higher.China proposes the overall goal of building intelligent grid for this reason, intelligent grid is made up of intelligent power transmission network and intelligent distribution network, 12 planning propose three general objectives of safe and reliable, high-quality and efficient, flexible interaction to intelligent distribution network, one of its core content makes power distribution network have higher power supply reliability, there is self-healing (reconstruct) function, reduce power supply trouble to greatest extent to the impact of user.
According to statistics, the power outage more than 95% that power consumer suffers causes due to distribution system reason, and distribution system fault 80% is singlephase earth fault.Singlephase earth fault easily produces electric arc, superpotential, causes phase fault tripping operation, device damage.Particularly present stage distribution system branch line many, line construction is complicated, the general only outlet breaker tripping operation when breaking down, even if by switch-segment on backbone, also limited several sections can only be isolated, and concrete abort situation will be found out often need at substantial human and material resources and time to be.Therefore, determine ground path and trouble spot timely and accurately, the power supply reliability of power distribution network, security are of great significance.
At present, the localization method of the distribution network failure generally adopted is: the method looking up the fault adopting manual site's line walking, searching at every turn and fixing a breakdown at least needs several hours.Therefore, the automatic positioning method developing a kind of high efficiency distribution network failure is extremely necessary.
Current power distribution network running environment is complicated, after generation equipment failure, bring difficulty to line inspection work.Present employing is broken down the method looking up the fault of artificial line walking, and searching at every turn and fixing a breakdown at least needs several hours, and automatization level is not high, will consume a large amount of human resources, cannot meet the needs that growing distribution line runs.Therefore, develop that a kind of fault to power distribution network is carried out online, in time, the system of monitor is very necessary.
Summary of the invention
The embodiment provides a kind of method and apparatus of distribution network failure being monitored and locating, to realize monitoring fast and accurately the fault of power distribution network and locating.
The device of monitoring distribution network failure and locating, comprising:
Distribution line on-line monitoring unit, for being arranged on the branch of distribution line, judge the short trouble of described distribution line according to the load current change of the described distribution line detected, the short trouble information of described distribution line is sent to power distribution network single-phase grounding comprehensive protecting device and faulted-phase judgment device;
Faulted-phase judgment device, for being arranged on the management control center of power distribution network, based on the criterion information preset, fusion treatment is carried out to the short trouble information that described distribution line monitoring unit sends over, obtain the fault location information of described short trouble information;
Power distribution network single-phase grounding comprehensive protecting device; for being arranged on the substation bus bar of power distribution network; after receiving the short trouble information that described distribution line on-line monitoring unit sends over; adopt fault phase automatically to shift the trouble spot ground current of described short trouble through Low ESR transformer grounding mode, realize extinguishing singlephase earth fault electric arc.
The method of monitoring distribution network failure and locating, comprising:
The branch of distribution line installs distribution line on-line monitoring unit, faulted-phase judgment device is set at the management control center of power distribution network, the substation bus bar of power distribution network is installed power distribution network single-phase grounding comprehensive protecting device;
Described distribution line on-line monitoring unit judges the short trouble of described distribution line according to the load current change of the described distribution line detected, the short trouble information of described distribution line is sent to power distribution network single-phase grounding comprehensive protecting device and faulted-phase judgment device;
Described faulted-phase judgment device, based on the criterion information preset, carries out fusion treatment to the short trouble information that described distribution line monitoring unit sends over, and obtains the fault location information of described short trouble information;
After described power distribution network single-phase grounding comprehensive protecting device receives the short trouble information that described distribution line on-line monitoring unit sends over; adopt fault phase automatically to shift the trouble spot ground current of described short trouble through Low ESR transformer grounding mode, realize extinguishing singlephase earth fault electric arc.
The technical scheme provided as can be seen from the embodiment of the invention described above, the embodiment of the present invention is by adopting the distribution network failure on-line monitoring under pattern Network Based, location and analysis, accurately can detect short circuit, open circuit, the multiple Distribution Network Failure such as single-phase earthing, solve distribution network failure all sidedly, do not expand accident, proterctive equipment, reduce human body electrification risk, fast, the location of accurate selection faulty line and trouble spot, to minimizing power off time, protection grid equipment, improve power supply reliability, the economic benefit improving power supply department and user is significant, also be the trend of intelligent power distribution network technology and industry development.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of device of distribution network failure being monitored and locating that Fig. 1 provides for the embodiment of the present invention one;
The processing flow chart of a kind of method of distribution network failure being monitored and locating that Fig. 2 provides for the embodiment of the present invention two.
Embodiment
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing for several specific embodiment, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment one
The embodiment of the present invention is large according to power distribution network area coverage, and the feature of grid structure complexity, studies based on thing connection technology, and the many nets of wireless optical fiber merge, and set up the reliable on-line monitoring communication network meeting power distribution network needs.Study and inject aspect through Low ESR transformer, realize the localization of fault under single phase earthing protection state, strengthen injection intensity, improve localization of fault precision; Study many criterions fault detector, realize short circuit, open circuit, singlephase earth fault accurately judge.
This embodiment offers a kind of structural representation of device of distribution network failure being monitored and locate as shown in Figure 1; comprise following module: distribution line monitoring unit 11, communication device 12, power distribution network single-phase grounding comprehensive protecting device 13, join faulted-phase judgment device 14, with substation bus bar and belonging to allot circuit and be divided into some subsystems.
Distribution line on-line monitoring unit 11, for being arranged on distribution line branch, adopts mutual inductor power taking, high capacity cell or solar powered mode, and the load current change according to the distribution line detected judges short trouble; According to the Injection Signal that the power distribution network single-phase grounding comprehensive protecting device received sends over, judge singlephase earth fault, described short trouble, singlephase earth fault are sent to communicator.This distribution line on-line monitoring unit is connected with block switch, branch circuit breaker, after receiving the fault isolation commands that described faulted-phase judgment device sends over, block switch, the branch circuit breaker fault zone to described abort situation place is utilized to isolate.
Communicator 12, for being arranged on distribution line branch, is connected with described distribution line on-line monitoring unit, and the short trouble sended over by described distribution line on-line monitoring unit, singlephase earth fault send to faulted-phase judgment device.
Power distribution network single-phase grounding comprehensive protecting device 13, for being arranged on substation bus bar, is the core component of each subsystem.Adopt fault phase automatically to shift trouble spot ground current through Low ESR transformer grounding mode, realize extinguishing singlephase earth fault electric arc; Stable state protective ground mode is adopted to limit intermittent grounding surge; Fault phase, human body, greatly three is adopted to force the available protecting of equipotential method realization to human body electrification; Residual voltage and line voltage magnitude phase compare is adopted to carry out ground connection phase selection; utilize ground connection to shift front and back zero-sequence current transfer characteristic equation and carry out fault-line selecting method; adopt Low ESR transformer secondary coil Injection Signal mode, realize the localization of fault under one-phase ground protection state and automatic resetting.
Faulted-phase judgment device 14, for being arranged on the management control center of power distribution network, Distribution power network GIS (GeographicInformationSystem can be accessed, Geographic Information System) information, PMS(powerproductionmanagementsystem, engineering production management system) information, the state of Real-Time Monitoring distribution network and fault, phase fault is realized together with positioning function with the instruction of single-phase grounding fault, the transmitted breath of each distribution line monitoring unit is processed, in conjunction with multiple criterion, application message fusion method, intelligence provides abort situation, the information such as fault type, automatically carry out fault when fault occurs and push away screen, power failure range is analyzed, localization of fault, be convenient to maintenance and the accident maintenance of circuit, can be used to again manage power distribution network facility, be convenient to the typing of facilities information, inquiry and statistics.According to the fault location information of described short trouble information, fault isolation commands is sent to described distribution line on-line monitoring unit by described communicator, for telechirics provides action message, Remote branch circuit breaker, isolated fault region, realizes intelligent distribution network self-healing and reconstruct.
Because power distribution network single-phase earthing monitoring unit is distributed in 10kV distribution line branch, unit is powered and various ways can be taked to combine: utilize electromagnetic induction principle, by contactless electromagnetic sensor from circuit power taking, coordinates rechargeable battery, forms supply voltage.For underload or intermittent load circuit, use solar powered mode.
Above-mentioned power distribution network single-phase grounding comprehensive protecting device is as station end equipment, and carry out communication by transformer station's fiber optic network and faulted-phase judgment device, above-mentioned transformer station fiber optic network is that electric system is special, can ensure its security.
Above-mentioned communicator is according to region and distribution situation, and choosing multiple communication modes: in big and medium-sized cities, utilizes distribution automation optical-fibre channel, and real-time, security is high; GPRS(general packet radio service technology is adopted, GeneralPacketRadioService at rural power grids) common network, application-specific section, area coverage is wide, can avoid other CU resources simultaneously; At self-closing and through circuit, use short wireless network, coordinate relaying, build dedicated network, there is higher cost performance.Adopt specialized protocol with power distribution network single-phase grounding comprehensive protecting device, prevent from trespassing and distortion information inflow.
Embodiment two
The treatment scheme of a kind of method of monitoring distribution network failure and locate that this embodiment provides as shown in Figure 2, comprises following treatment step:
Step 21, distribution line on-line monitoring unit is installed in the branch of distribution line, faulted-phase judgment device is set at the management control center of power distribution network, the substation bus bar of power distribution network is installed power distribution network single-phase grounding comprehensive protecting device.
Step 22, described distribution line on-line monitoring unit judge the short trouble of described distribution line according to the load current change of the described distribution line detected, the short trouble information of described distribution line is sent to power distribution network single-phase grounding comprehensive protecting device and faulted-phase judgment device.
Step 23, described faulted-phase judgment device, based on the criterion information preset, carry out fusion treatment to the short trouble information that described distribution line monitoring unit sends over, and obtain the fault location information of described short trouble information.
After described power distribution network single-phase grounding comprehensive protecting device receives the short trouble information that described distribution line on-line monitoring unit sends over; adopt fault phase automatically to shift the trouble spot ground current of described short trouble through Low ESR transformer grounding mode, realize extinguishing singlephase earth fault electric arc.
Described method also comprises:
Be arranged on by communicator in distribution line branch, described communication module is connected with described distribution line on-line monitoring unit, and the short trouble information that described distribution line on-line monitoring unit sends over is sent to faulted-phase judgment device.
Described method also comprises:
The Injection Signal that described distribution line on-line monitoring unit sends over according to the power distribution network single-phase grounding comprehensive protecting device received, judges singlephase earth fault, described singlephase earth fault is sent to communicator;
The singlephase earth fault that described distribution line on-line monitoring unit sends over is sent to faulted-phase judgment device by described communicator.
Described method also comprises:
Described faulted-phase judgment device, according to the fault location information of described short trouble information, sends fault isolation commands by described communicator to described distribution line on-line monitoring unit;
Described distribution line on-line monitoring unit utilizes block switch, the branch circuit breaker fault zone to described abort situation place to isolate after receiving the fault isolation commands that described faulted-phase judgment device sends over.
Described method also comprises:
Described power distribution network single-phase grounding comprehensive protecting device adopts stable state protective ground mode to limit intermittent grounding surge; Fault phase, human body, greatly three is adopted to force the available protecting of equipotential method realization to human body electrification; Residual voltage and line voltage magnitude phase compare is adopted to carry out ground connection phase selection; utilize ground connection to shift front and back zero-sequence current transfer characteristic equation and carry out fault-line selecting method; adopt Low ESR transformer secondary coil Injection Signal mode, realize the localization of fault under one-phase ground protection state and automatic resetting.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the equipment in embodiment can describe according to embodiment and be distributed in the equipment of embodiment, also can carry out respective change and be arranged in the one or more equipment being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
In sum, the embodiment of the present invention is by adopting the distribution network failure on-line monitoring under pattern Network Based, location and analysis, accurately can detect short circuit, open circuit, the multiple Distribution Network Failure such as single-phase earthing, solve distribution network failure all sidedly, do not expand accident, proterctive equipment, reduce human body electrification risk, fast, the location of accurate selection faulty line and trouble spot, to minimizing power off time, protection grid equipment, improve power supply reliability, the economic benefit improving power supply department and user is significant, also be the trend of intelligent power distribution network technology and industry development.
The embodiment of the present invention, in conjunction with fault automatic location system looking up the fault, can save trouble shooting time greatly.The enforcement of distribution line fault location system will reduce because line fault causes the economic loss having a power failure and cause, and expection can obtain good economic benefit and social benefit.Therefore be with a wide range of applications.
The device of monitoring distribution network failure and locating of the embodiment of the present invention can as the subsystem of distribution automation system, localization of fault and line information on-line monitoring is realized in the area that distribution automation cannot cover, grope for setting up effective fast power restoration mechanism, all distribution lines can be directly applied to, project itself is easy to implement fast, therefore can large-scale popularization and copying.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (4)
1. the device of monitoring distribution network failure and locating, is characterized in that, comprising:
Distribution line on-line monitoring unit, for being arranged on the branch of distribution line, judge the short trouble of described distribution line according to the load current change of the described distribution line detected, the short trouble information of described distribution line is sent to power distribution network single-phase grounding comprehensive protecting device and faulted-phase judgment device;
Faulted-phase judgment device, for being arranged on the management control center of power distribution network, based on the criterion information preset, fusion treatment is carried out to the short trouble information that described distribution line monitoring unit sends over, obtain the fault location information of described short trouble information;
Power distribution network single-phase grounding comprehensive protecting device, for being arranged on the substation bus bar of power distribution network, after receiving the short trouble information that described distribution line on-line monitoring unit sends over, adopt fault phase automatically to shift the trouble spot ground current of described short trouble through Low ESR transformer grounding mode, realize extinguishing singlephase earth fault electric arc;
Communicator, for being arranged on distribution line branch, is connected with described distribution line on-line monitoring unit, the short trouble information that described distribution line on-line monitoring unit sends over is sent to faulted-phase judgment device;
Further,
Described distribution line on-line monitoring unit, the Injection Signal also for sending over according to the described power distribution network single-phase grounding comprehensive protecting device received, judges singlephase earth fault, described singlephase earth fault is sent to communicator;
Described communicator, the singlephase earth fault also for being sended over by described distribution line on-line monitoring unit sends to faulted-phase judgment device;
Further, described faulted-phase judgment device, also for the fault location information according to described short trouble information, sends fault isolation commands by described communicator to described distribution line on-line monitoring unit;
Described distribution line on-line monitoring unit, also for being connected with block switch, branch circuit breaker, after receiving the fault isolation commands that described faulted-phase judgment device sends over, described block switch, the branch circuit breaker fault zone to described abort situation place is utilized to isolate.
2. the device of monitoring distribution network failure and locating according to claim 1, is characterized in that:
Described power distribution network single-phase grounding comprehensive protecting device, also for adopting stable state protective ground mode to limit intermittent grounding surge; Fault phase, human body, greatly three is adopted to force the available protecting of equipotential method realization to human body electrification; Residual voltage and line voltage magnitude phase compare is adopted to carry out ground connection phase selection; utilize ground connection to shift front and back zero-sequence current transfer characteristic equation and carry out fault-line selecting method; adopt Low ESR transformer secondary coil Injection Signal mode, realize the localization of fault under one-phase ground protection state and automatic resetting.
3. the method for monitoring distribution network failure and locating, is characterized in that, comprising:
The branch of distribution line installs distribution line on-line monitoring unit, faulted-phase judgment device is set at the management control center of power distribution network, the substation bus bar of power distribution network is installed power distribution network single-phase grounding comprehensive protecting device;
Described distribution line on-line monitoring unit judges the short trouble of described distribution line according to the load current change of the described distribution line detected, the short trouble information of described distribution line is sent to power distribution network single-phase grounding comprehensive protecting device and faulted-phase judgment device;
Described faulted-phase judgment device, based on the criterion information preset, carries out fusion treatment to the short trouble information that described distribution line monitoring unit sends over, and obtains the fault location information of described short trouble information;
After described power distribution network single-phase grounding comprehensive protecting device receives the short trouble information that described distribution line on-line monitoring unit sends over, adopt fault phase automatically to shift the trouble spot ground current of described short trouble through Low ESR transformer grounding mode, realize extinguishing singlephase earth fault electric arc;
Be arranged on by communicator in distribution line branch, described communicator is connected with described distribution line on-line monitoring unit, and the short trouble information that described distribution line on-line monitoring unit sends over is sent to faulted-phase judgment device;
Further,
The Injection Signal that described distribution line on-line monitoring unit sends over according to the power distribution network single-phase grounding comprehensive protecting device received, judges singlephase earth fault, described singlephase earth fault is sent to communicator;
The singlephase earth fault that described distribution line on-line monitoring unit sends over is sent to faulted-phase judgment device by described communicator;
Further,
Described faulted-phase judgment device, according to the fault location information of described short trouble information, sends fault isolation commands by described communicator to described distribution line on-line monitoring unit;
Described distribution line on-line monitoring unit utilizes block switch, the branch circuit breaker fault zone to described abort situation place to isolate after receiving the fault isolation commands that described faulted-phase judgment device sends over.
4. the method for distribution network failure being monitored and locating according to claim 3, it is characterized in that, described method also comprises:
Described power distribution network single-phase grounding comprehensive protecting device adopts stable state protective ground mode to limit intermittent grounding surge; Fault phase, human body, greatly three is adopted to force the available protecting of equipotential method realization to human body electrification; Residual voltage and line voltage magnitude phase compare is adopted to carry out ground connection phase selection; utilize ground connection to shift front and back zero-sequence current transfer characteristic equation and carry out fault-line selecting method; adopt Low ESR transformer secondary coil Injection Signal mode, realize the localization of fault under one-phase ground protection state and automatic resetting.
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| CN103336220A (en) | 2013-10-02 |
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