CN109188195A - A kind of distribution small current grounding fault localization method and system - Google Patents
A kind of distribution small current grounding fault localization method and system Download PDFInfo
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- CN109188195A CN109188195A CN201810938248.0A CN201810938248A CN109188195A CN 109188195 A CN109188195 A CN 109188195A CN 201810938248 A CN201810938248 A CN 201810938248A CN 109188195 A CN109188195 A CN 109188195A
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- 238000009826 distribution Methods 0.000 title claims abstract description 120
- 230000004807 localization Effects 0.000 title claims abstract description 11
- 230000001052 transient Effects 0.000 claims abstract description 32
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- 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 present invention discloses a kind of distribution small current grounding fault localization method based on multi-source information and transient state recording, and power distribution automation main station obtains busbar grounding and alerts moment t；When distribution line current break is greater than threshold value I or the mutation of distribution line phase electric field strength is greater than threshold value E, the transient state recording type fault detector starting recording being installed on distribution line, and form recorded wave file；Power distribution automation main station calls all recorded wave files of distribution line under substation in several minutes sections in moment t front and back together on fault detector；Power distribution automation main station establishes the incidence relation of fault detector installation site and recorded wave file on line topological；Power distribution automation main station extracts the residual voltage phase of each recorded wave file, zero-sequence current phase；The relative position of earth fault and fault detector is judged according to the relative direction of residual voltage, zero-sequence current, it is final to determine ground fault section.Energy high frequency zone effective information of the present invention, quick and precisely positions small current grounding fault.
Description
Technical field
The invention belongs to the electric network fault analysis technical fields of electric system, and in particular to one kind is based on multi-source information and temporarily
The distribution small current grounding fault localization method and system of state recording.
Background technique
Power distribution network is as the power network for being directly facing user, and in large scale, equipment is various, and environment of powering is complicated, becomes
The multiple severely afflicated area of failure, according to statistics, 80% or more power outage is caused by distribution network failure, and 70% is in distribution network failure
Singlephase earth fault.In power distribution network, isolated neutral or through grounding through arc be small current neutral grounding mode.The small electricity of power distribution network
The problem of singlephase earth fault positioning for flowing earthed system is always urgent need to resolve.To solve the above-mentioned problems, power distribution network is promoted
Power supply reliability, Distribution Automation Technology comes into being.In existing Distribution Automation Technology, determining for singlephase earth fault is solved
Position method is: installing transient state recording type fault detector additional on the line, the electric current that monitors when fault detector, field strength reach touching
When sending out the condition of fault detector recording, fault detector carries out recording, and power distribution automation main station will be given in recorded wave file,
Earth design analysis is carried out by main website.Since the events such as big load switching also will start fault detector recording, thus it is above-mentioned
Method the case where there are ungrounded fault waveform Shang Song main websites, main website redundancy is more, and analysis pressure is larger, and it is fixed to influence main website
The efficiency and accuracy of position ground fault.With the continuous promotion of the power distribution network level of IT application, by substation, power distribution automation
The multi-source informations such as main website, fault detector, high frequency zone effective information, quick and precisely position small current grounding fault, to promotion
Distribution network reliability is of great significance.
Summary of the invention
To solve deficiency in the prior art, the present invention provides a kind of small electricity of the distribution based on multi-source information and transient state recording
Earth design method and system is flowed, solves fault detector upload information redundancy, small current neutral grounding event in the prior art
The problem of hindering location difficulty.
In order to achieve the above objectives, the present invention adopts the following technical scheme: it is a kind of based on multi-source information and transient state recording
Distribution small current grounding fault localization method, it is characterised in that: the following steps are included:
Step 1: when singlephase earth fault occurs for distribution line, power distribution automation main station obtains substation bus bar ground connection and accuses
Alert moment t；
Step 2: power distribution automation main station is set in duration under substation before and after calling alarm moment t together on fault detector
All recorded wave files of distribution line, the recorded wave file are when distribution line current break is greater than threshold value I or distribution line phase
When electric field strength mutation is greater than threshold value E, recording is carried out by the transient state recording type fault detector being installed on distribution line and is formed
Recorded wave file；
Step 3: power distribution automation main station establishes the pass of fault detector installation site and recorded wave file on line topological
Connection relationship；
Step 4: power distribution automation main station extracts the residual voltage phase of each recorded wave file, zero-sequence current phase；
Step 5: according to the incidence relation of fault detector installation site and recorded wave file, each recorded wave file pair is obtained
The fault detector installation site answered, power distribution automation main station judge whether the zero-sequence current phase of each recorded wave file lags zero
Sequence voltage phase, if so, fault point is located at the downstream of fault detector installation site, if it is not, then fault point refers to positioned at failure
The upstream for showing device installation site determines power distribution network small current grounding fault by the positional relationship of fault point and each fault detector
Section.
A kind of distribution small current grounding fault localization method based on multi-source information and transient state recording above-mentioned, feature exist
In: the step 1 when singlephase earth fault occurs for distribution line, generates power transformation for monitoring the device of zero sequence amount in substation
It stands busbar grounding warning information, and is uploaded to smart grid Dispatching Control System, power distribution automation main station is dispatched from smart grid
Busbar grounding is read in the ground connection warning information of control system alerts moment t.
A kind of distribution small current grounding fault localization method based on multi-source information and transient state recording above-mentioned, feature exist
In: the transient state recording type fault detector can be measured that distribution line electric current and field strength, when fault detector monitors to match
When electric line current break is greater than threshold value I or the mutation of distribution line phase electric field strength greater than threshold value E, fault detector starting record
Wave, and form recorded wave file.
A kind of distribution small current grounding fault localization method based on multi-source information and transient state recording above-mentioned, feature exist
In: when event occurs for distribution line, if meeting, distribution line current break is greater than threshold value I or the mutation of route phase electric field strength is greater than
Threshold value E, then fault detector then will start recording.
A kind of distribution small current grounding fault localization method based on multi-source information and transient state recording above-mentioned, feature exist
In: the event includes following one kind: big load switching, short trouble, ground fault.
A kind of distribution small current grounding fault positioning system based on multi-source information and transient state recording, which is characterized in that packet
Include power distribution automation main station, substation, the transient state recording type fault detector being installed on distribution line；
When singlephase earth fault occurs for distribution line, when the power distribution automation main station obtains substation bus bar ground connection alarm
Carve t；
Power distribution automation main station calls before and after alarm moment t in setting duration section distribution under substation together on fault detector
All recorded wave files of route, the recorded wave file are when distribution line current break is greater than threshold value I or distribution line phase electric field
When Intensity Abrupt is greater than threshold value E, the record of recording formation is carried out by the transient state recording type fault detector being installed on distribution line
Wave file；
Power distribution automation main station establishes the incidence relation of fault detector installation site and recorded wave file on line topological；
Power distribution automation main station extracts the residual voltage phase of each recorded wave file, zero-sequence current phase；
According to the incidence relation of fault detector installation site and recorded wave file, the corresponding failure of each recorded wave file is obtained
Indicator installation site, power distribution automation main station judge whether the zero-sequence current phase of each recorded wave file lags residual voltage phase
Position, if so, fault point is located at the downstream of fault detector installation site, if it is not, then fault point is located at fault detector installation
The upstream of position determines power distribution network section with low-current ground faults by the positional relationship of fault point and each fault detector.
A kind of distribution small current grounding fault positioning system based on multi-source information and transient state recording above-mentioned, feature exist
In when singlephase earth fault occurs for distribution line, for monitoring the device generation substation bus bar ground connection of zero sequence amount in substation
Warning information, and it is uploaded to smart grid Dispatching Control System；Power distribution automation main station is from smart grid Dispatching Control System
It is grounded in warning information and reads busbar grounding alarm moment t.
The invention has the benefit that the present invention is based on smart grid Dispatching Control Systems, power distribution automation main station system
The multi-source informations such as system, transient state recording type fault detector, energy high frequency zone effective information quick and precisely position small current neutral grounding event
Barrier, provides decision support for distribution scheduling, inspection and repairing.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of distribution small current grounding fault localization method based on multi-source information and transient state recording, including
Following steps:
Step 1: when singlephase earth fault occurs for distribution line, become in substation for monitoring the device of zero sequence amount and generating
Power station busbar grounding warning information, and it is uploaded to smart grid Dispatching Control System；Smart grid Dispatching Control System is from ground connection
Busbar grounding is read in warning information and alerts moment t, and is transferred to power distribution automation main station；
Step 2: according to fault indicator principle, when distribution line current break is greater than threshold value I or distribution line phase
When electric field strength mutation is greater than threshold value E, the transient state recording type fault detector starting recording being installed on distribution line, and formed
Recorded wave file；
When event, such as big load switching, short trouble, ground fault occurs for route, if meeting transient state recording type failure
The mutation of indicator recording entry condition, i.e. line current is greater than threshold value I or the mutation of route phase electric field strength is greater than threshold value E, then event
Barrier indicator will start recording, and unrelated with fault detector installation site, and transient state recording type fault detector can measure
Line current and field strength；
Step 3: power distribution automation main station calls section [t-5, t+5] power transformation in 5 minutes before and after moment t together on fault detector
It stands down all recorded wave files of distribution line；
Substation bus bar is grounded alarm to smart grid Dispatching Control System and busbar grounding alarm moment t sends to and matches
Electric automation main website, by all recorded wave files for calling route under 5 minutes section [t-5, the t+5] substations in the front and back t in main website together；Recording
File is become calling fault detector recorded wave file in main website selectivity together from traditional send from fault detector active to main website.It will
It is non-to greatly reduce fault detector as the trigger condition for calling fault detector waveform in main website together for substation bus bar ground connection alarm
It is sent on fault waveform, analysis of the main website to redundancies recorded wave files such as big load switching, short troubles can be effectively reduced, improved
Power distribution network small current grounding fault processing speed；
Step 4: power distribution automation main station establishes the pass of fault detector installation site and recorded wave file on line topological
Connection relationship；
Step 5: power distribution automation main station extracts the residual voltage phase of each recorded wave file, zero-sequence current phase；
Step 6: power distribution automation main station judges whether zero-sequence current lags residual voltage, if so, fault point is located at event
The downstream for hindering indicator installation site, if it is not, then fault point is located at the upstream of fault detector installation site；By fault point and respectively
The positional relationship of a fault detector determines ground fault section.It is connect according to the judgement of the relative direction of residual voltage, zero-sequence current
The relative position of earth fault point and fault detector, it is final to determine ground fault section, the small electricity suitable for isolated neutral
Flow earthed system.
The present invention is based on smart grid Dispatching Control System, power distribution automation main station system, transient state recording type indicating fault
The multi-source informations such as device, high frequency zone effective information, quick and precisely position small current grounding fault, for distribution scheduling, inspection and rob
Offer decision support is provided.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of distribution small current grounding fault localization method based on multi-source information and transient state recording, it is characterised in that: including
Following steps:
Step 1: when singlephase earth fault occurs for distribution line, when power distribution automation main station obtains substation bus bar ground connection alarm
Carve t；
Step 2: power distribution automation main station calls before and after alarm moment t in setting duration distribution under substation together on fault detector
All recorded wave files of route, the recorded wave file are when distribution line current break is greater than threshold value I or distribution line phase electric field
When Intensity Abrupt is greater than threshold value E, the record of recording formation is carried out by the transient state recording type fault detector being installed on distribution line
Wave file；
Step 3: what power distribution automation main station established fault detector installation site and recorded wave file on line topological is associated with pass
System；
Step 4: power distribution automation main station extracts the residual voltage phase of each recorded wave file, zero-sequence current phase；
Step 5: according to the incidence relation of fault detector installation site and recorded wave file, it is corresponding to obtain each recorded wave file
Fault detector installation site, power distribution automation main station judge whether the zero-sequence current phase of each recorded wave file lags zero sequence electricity
Phase is pressed, if so, fault point is located at the downstream of fault detector installation site, if it is not, then fault point is located at fault detector
The upstream of installation site determines power distribution network small current grounding fault area by the positional relationship of fault point and each fault detector
Section.
2. a kind of distribution small current grounding fault positioning side based on multi-source information and transient state recording according to claim 1
Method, it is characterised in that: the step 1, when singlephase earth fault occurs for distribution line, for monitoring zero sequence amount in substation
Device generates substation bus bar and is grounded warning information, and is uploaded to smart grid Dispatching Control System, power distribution automation main station from
Busbar grounding is read in the ground connection warning information of smart grid Dispatching Control System alerts moment t.
3. a kind of distribution small current grounding fault positioning side based on multi-source information and transient state recording according to claim 1
Method, it is characterised in that: the transient state recording type fault detector can be measured that distribution line electric current and field strength, work as indicating fault
When device monitors that distribution line current break is greater than threshold value I or the mutation of distribution line phase electric field strength greater than threshold value E, indicating fault
Device starts recording, and forms recorded wave file.
4. a kind of distribution small current grounding fault positioning side based on multi-source information and transient state recording according to claim 1
Method, it is characterised in that: when event occurs for distribution line, if meeting distribution line current break greater than threshold value I or route phase electric field
Intensity Abrupt is greater than threshold value E, then fault detector then will start recording.
5. a kind of distribution small current grounding fault positioning side based on multi-source information and transient state recording according to claim 4
Method, it is characterised in that: the event includes following one kind: big load switching, short trouble, ground fault.
6. a kind of distribution small current grounding fault positioning system based on multi-source information and transient state recording, which is characterized in that including
Power distribution automation main station, substation, the transient state recording type fault detector being installed on distribution line；
When singlephase earth fault occurs for distribution line, the power distribution automation main station obtains substation bus bar ground connection alarm moment t；
Power distribution automation main station calls before and after alarm moment t in setting duration section distribution line under substation together on fault detector
All recorded wave files, the recorded wave file be when distribution line current break be greater than threshold value I or distribution line phase electric field strength
When mutation is greater than threshold value E, the recording text of recording formation is carried out by the transient state recording type fault detector being installed on distribution line
Part；
Power distribution automation main station establishes the incidence relation of fault detector installation site and recorded wave file on line topological；
Power distribution automation main station extracts the residual voltage phase of each recorded wave file, zero-sequence current phase；
According to the incidence relation of fault detector installation site and recorded wave file, the corresponding indicating fault of each recorded wave file is obtained
Device installation site, power distribution automation main station judge whether the zero-sequence current phase of each recorded wave file lags residual voltage phase,
If so, fault point is located at the downstream of fault detector installation site, if it is not, then fault point is located at fault detector installation site
Upstream, power distribution network section with low-current ground faults is determined by the positional relationship of fault point and each fault detector.
7. a kind of positioned based on multi-source information and the distribution small current grounding fault of transient state recording according to claim 6 is
System, which is characterized in that when singlephase earth fault occurs for distribution line, generate power transformation for monitoring the device of zero sequence amount in substation
It stands busbar grounding warning information, and is uploaded to smart grid Dispatching Control System；Power distribution automation main station is dispatched from smart grid
Busbar grounding is read in the ground connection warning information of control system alerts moment t.
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| CN110208656A (en) * | 2019-07-03 | 2019-09-06 | 国网北京市电力公司 | A kind of Distribution Network Failure automatic station-keeping system |
| CN110297161A (en) * | 2019-06-21 | 2019-10-01 | 国网河北省电力有限公司 | Take precautions against the method and scheduling system of with ground power transmission of grid equipment |
| CN110426596A (en) * | 2019-09-11 | 2019-11-08 | 山东职业学院 | A kind of Distributed power line single phase grounding failure Section Location |
| CN110426606A (en) * | 2019-09-11 | 2019-11-08 | 国网重庆市电力公司电力科学研究院 | Based on wide area synchronous distribution net work earthing fault localization method and device |
| CN110542823A (en) * | 2019-09-11 | 2019-12-06 | 山东职业学院 | Distribution line single-phase earth fault section positioning method |
| CN110632462A (en) * | 2019-10-29 | 2019-12-31 | 深圳供电局有限公司 | Small current grounding fault positioning method and system, computer equipment and medium |
| CN110907750A (en) * | 2019-11-21 | 2020-03-24 | 国电南瑞南京控制系统有限公司 | Power distribution main station single-phase earth fault positioning method and system based on medium resistance method |
| CN110907752A (en) * | 2019-11-29 | 2020-03-24 | 科大智能电气技术有限公司 | Method for acquiring transient initial point of zero-sequence current in single-phase earth fault of power distribution network |
| CN111289838A (en) * | 2020-02-13 | 2020-06-16 | 国电南瑞科技股份有限公司 | Single-phase earth fault positioning method and system based on distribution network PMU |
| CN113311288A (en) * | 2021-05-11 | 2021-08-27 | 国网浙江省电力有限公司湖州供电公司 | Small current grounding fault searching and positioning method and system |
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| CN110542823A (en) * | 2019-09-11 | 2019-12-06 | 山东职业学院 | Distribution line single-phase earth fault section positioning method |
| CN110426606B (en) * | 2019-09-11 | 2021-07-27 | 国网重庆市电力公司电力科学研究院 | Power distribution network ground fault positioning method and device based on wide area synchronization |
| CN110632462A (en) * | 2019-10-29 | 2019-12-31 | 深圳供电局有限公司 | Small current grounding fault positioning method and system, computer equipment and medium |
| CN110907750A (en) * | 2019-11-21 | 2020-03-24 | 国电南瑞南京控制系统有限公司 | Power distribution main station single-phase earth fault positioning method and system based on medium resistance method |
| CN110907752A (en) * | 2019-11-29 | 2020-03-24 | 科大智能电气技术有限公司 | Method for acquiring transient initial point of zero-sequence current in single-phase earth fault of power distribution network |
| CN111289838A (en) * | 2020-02-13 | 2020-06-16 | 国电南瑞科技股份有限公司 | Single-phase earth fault positioning method and system based on distribution network PMU |
| CN113311288A (en) * | 2021-05-11 | 2021-08-27 | 国网浙江省电力有限公司湖州供电公司 | Small current grounding fault searching and positioning method and system |
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