CN109490681A - The on-the-spot test method and device of the feeder line of type on the spot based on terminal injection method - Google Patents
The on-the-spot test method and device of the feeder line of type on the spot based on terminal injection method Download PDFInfo
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- CN109490681A CN109490681A CN201910006413.3A CN201910006413A CN109490681A CN 109490681 A CN109490681 A CN 109490681A CN 201910006413 A CN201910006413 A CN 201910006413A CN 109490681 A CN109490681 A CN 109490681A
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- logic
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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
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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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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The embodiment of the present application shows the on-the-spot test method and device of the feeder line of type on the spot based on terminal injection method, which comprises wireless module acquires the feed line automatization terminal on-off model;According to the logic of the on-off model, fault message is determined, the upper fault message includes: location of fault, and, the type of failure.By the technical solution shown in the embodiment of the present application, can be realized in the case where not having a power failure to type feeder automation carries out on-the-spot test, strong operability on the spot in operation;It can be avoided in test process and intersect with original wireless public network at the scene, it is highly-safe;Survey line road can be treated and realize complete test, improve the efficiency for searching system defect before type feeder automation puts into operation on the spot;The Reliability of Microprocessor of feeder automation in practical applications is improved, provides foundation to verify the correctness of type feeder automation response policy and action logic on the spot.
Description
Technical field
The present invention relates to test technique automatic fields, in particular to the scene of the feeder line of type on the spot based on terminal injection method
Test method and device.
Background technique
With Kunming, the end of Yuxi distribution automation pilot, Yunnan distribution automation system construction achieve tentatively at
Achievement.In conjunction with power grid status, emphasis is promoted type feed line automatization system on the spot from now on by Yunnan.
But for type feeder automation on-the-spot test technology on the spot, there are blank at present, it can not be to type feeder line on the spot certainly
The allomeric function and service performance of dynamicization system make correct judge.
On-the-spot test method and device provides foundation for type feeder automation on-the-spot test on the spot, makes up and currently lacks effectively
Method can find feed line automatization system as the technological gap for examining type feed line automatization system allomeric function and performance on the spot
Itself, it is ensured that type feed line automatization system plays the effect of should having on the spot, is feed line automatization system
Construction provides technical guarantee.
Summary of the invention
Currently lack effective ways as the skill for examining type feed line automatization system allomeric function and performance on the spot to make up
Art blank, the present invention provide the on-the-spot test method and device of the feeder line of type on the spot based on terminal injection method, find line feed terminals
Between logic cooperation and the problem of time cooperation and system defect.
The embodiment of the present application first aspect shows a kind of on-the-spot test method of feeder line of type on the spot based on terminal injection method,
The described method includes:
Wireless module acquires the feed line automatization terminal on-off model;
According to the logic of the on-off model, fault message is determined, the upper fault message includes: location of fault,
And the type of failure.
Selectable, the logic according to on-off model, the step of determining fault message includes:
Determine the logic of the feed line automatization terminal on-off model;Judge the feed line automatization terminal switching value letter
Number logic it is whether correct;
If correct, terminate test;
If incorrect, advised according to the preset logic that the logic of the feed line automatization terminal on-off model is met
Then, fault message is determined.
It is selectable, the generating process of the preset logic rule specifically:
Normal current voltage is injected more feed line automatization terminals by more relay protection instrument;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage, generates preset switching value, institute
The logic for stating preset switching value is preset logic rule.
It is selectable, the wireless module and original wireless public network independent operating simultaneously.
Selectable, relay protection instrument is provided with 4 road electric current delivery outlets, 4 road voltage outputs.
The embodiment of the present application second aspect shows a kind of on-site testing device of feeder line of type on the spot based on terminal injection method,
Described device includes:
Wireless module, and, relay protection instrument, and, module is forced, and, host;
Module is forced in installation on every scene switch of route to be measured, in every line automation terminal of route to be measured
Wireless module is installed;
Normal current voltage is injected into more feed line automatization terminals by more relay protection instrument, wherein every relay protection instrument is corresponding
One line feed terminals;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage;
Wireless module acquires the feed line automatization terminal on-off model;
Host determines fault message, the upper fault message includes: the position of failure according to the logic of the on-off model
It sets, and, the type of failure.
Selectable, the host is also used to determine the logic of the feed line automatization terminal on-off model;Judge institute
Whether the logic for stating feed line automatization terminal on-off model is correct;
If correct, terminate test;
If incorrect, advised according to the preset logic that the logic of the feed line automatization terminal on-off model is met
Then, fault message is determined.
It is selectable, the generating process of the preset logic rule specifically:
Normal current voltage is injected more feed line automatization terminals by more relay protection instrument;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage, generates preset switching value, institute
The logic for stating preset switching value is preset logic rule.
It is selectable, the wireless module and original wireless public network independent operating simultaneously.
Selectable, relay protection instrument is provided with 4 road electric current delivery outlets, 4 road voltage outputs.
From the above technical scheme, the scene that the embodiment of the present application shows the feeder line of type on the spot based on terminal injection method is surveyed
Method for testing and device, which comprises wireless module acquires the feed line automatization terminal on-off model;It is opened according to described
The logic of signal is measured in pass, determines fault message, the upper fault message includes: location of fault, and, the type of failure.It is logical
The technical solution shown in the embodiment of the present application is crossed, can be realized in the case where not having a power failure to type feeder automation on the spot in operation
Carry out on-the-spot test, strong operability;It can be avoided in test process and intersect with original wireless public network at the scene, safety
It is high;Survey line road can be treated and realize complete test, improve the efficiency for searching system defect before type feeder automation puts into operation on the spot;It mentions
The Reliability of Microprocessor of high feeder automation in practical applications, to verify type feeder automation response policy and action logic on the spot
Correctness provide foundation.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the on-the-spot test side that a kind of feeder line of type on the spot based on terminal injection method exemplified is preferably implemented according to one
The flow chart of method;
Fig. 2 is that the schematic illustration exemplified is preferably implemented according to one.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1:
The embodiment of the present application first aspect shows a kind of on-the-spot test method of feeder line of type on the spot based on terminal injection method,
The described method includes:
S101 wireless module acquires the feed line automatization terminal on-off model;
On-off model refers to the acquisition and output of noncontinuity signal, including state-signal collection and remote control output.It has 1 He
0 two states, this is the switching behavior in digital circuit, and refers to the on and off of circuit or perhaps the connection of contact on electric power
And disconnection."ON" and "Off" are that electric appliance is most basic, most typical function.General switching value device is opened by internal relay realization
The output of pass amount.
S102 determines fault message, the upper fault message includes: the position of failure according to the logic of the on-off model
It sets, and, the type of failure.
Referring to Fig. 2, wireless module is mounted on feeder automation end 3FTU/DTU, special test host 1 simulates main website
It is connected by 4G network and feed line automatization terminal 3, fault current is artificially injected to feed line automatization terminal 3 by relay protection instrument 4
Device on-off model is passed through 4G network-feedback on test host 1, is manually analyzed by voltage, feed line automatization terminal,
It can thus intersect to avoid having with original wireless public network, while the logic that can be verified between feed line automatization terminal is matched
It closes, the correctness of time coordinations.Every relay protection tester 4 respectively corresponds every feed line automatization terminal 3, whole to feeder automation
End 3 injection three-phase voltage, three-phase current are tested wherein a relay protection instrument 4 injects fault current voltage to feed line automatization terminal
It tries all installations of switch 2 of route and forces module 21, only allow it to issue tripping and switching signal, prevent it from really exporting tripping,
Tested line tripping is avoided in this way to have a power failure.
The on-the-spot test method provided through the invention carries out fault handling logic and performance test to distribution network, can
It is realized in the case where not having a power failure to type feeder automation carries out on-the-spot test, strong operability on the spot in operation;It surveys at the scene
It can be avoided during examination and intersect with original wireless public network, it is highly-safe;Survey line road can be treated and realize complete test, improved
The efficiency of system defect is searched before type feeder automation puts into operation on the spot;Improve the reliable in action of feeder automation in practical applications
Property, foundation is provided to verify the correctness of type feeder automation response policy and action logic on the spot.
Selectable, the logic according to on-off model, the step of determining fault message includes:
Determine the logic of the feed line automatization terminal on-off model;Judge the feed line automatization terminal switching value letter
Number logic it is whether correct;
If correct, terminate test;
If incorrect, advised according to the preset logic that the logic of the feed line automatization terminal on-off model is met
Then, fault message is determined.
Wherein, judge whether the logic of the feed line automatization terminal on-off model is correct, can be time-program(me) formula:
According to preset Time sequence control, each program has the stringent set time.Basic logic formula: basic "AND" is used
"or" inverter.The logic circuits such as trigger circuit are constituted.It is corresponding defeated when input signal meets scheduled logical operation relationship
Out signal set up and it is logically true.Step-by-step movement: entire control circuit is divided into several program step circuits, and at any time only one
A program step work;
Fixed routine formula: solid logic element etc. is connected with hardwire mode according to scheduled control program.Only it is applicable in
In the stored program controlled that operation rule is constant, control device is dedicated.Matrix form variable program mode: diode matrix wiring side is utilized
Formula.Programmable mode: using software programming, and program is packed into microcomputer or PLC.
By use logical device classify relay logic: for constituting relay system program control device.Transistor logic:
The program control device constituted based on transistor discrete component Digital Logical Circuits.Integrated circuit logic device: with integrated number
The program control device constituted based on word circuit.Programmable logic device: control logic is implemented in software, and main hardware is by integrating
Circuit and microcomputer (PLC) are constituted.
It is selectable, the generating process of the preset logic rule specifically:
Normal current voltage is injected more feed line automatization terminals by more relay protection instrument;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage, generates preset switching value, institute
The logic for stating preset switching value is preset logic rule.
Technical solution shown in the embodiment of the present application presets standard failure, i.e. a relay protection instrument Xiang Yitai feeder line is automatic
Change terminal and injects fault current voltage;
Wherein, the feed line automatization terminal of failure abort situation it is known that fault type it is known that by failure known to these
Position, and, fault type is contacted with the foundation of preset logic rule;
When finding to set patrolling for feed line automatization terminal on-off model that logic rules are consistent with described in detection process
Volume, that is, it can conclude that the abort situation of the feed line automatization terminal, and, fault type;
It is worth noting that, the abort situation of the technical solution shown in the embodiment of the present application can be with are as follows: the feeder line is automatic
Change the position on terminal geographic;
Also the position of some specific part of feed line automatization terminal is also referred to.
It is selectable, the wireless module and original wireless public network independent operating simultaneously.
Device on-off model is fed back to test host by wireless 4G network test channel by feed line automatization terminal, and
The data of actual motion are transmitted using wireless public network, can be handed in this way to avoid network when test and original wireless public network
Fork.
Selectable, relay protection instrument is provided with 4 road electric current delivery outlets, 4 road voltage outputs.
The embodiment of the present application second aspect shows a kind of on-site testing device of feeder line of type on the spot based on terminal injection method,
Described device includes:
Wireless module, and, relay protection instrument, and, module is forced, and, host;
Module is forced in installation on every scene switch of route to be measured, in every line automation terminal of route to be measured
Wireless module is installed;
Module is forced in installation on every scene switch of route to be measured, prevents switch trip during test from leading to route
Have a power failure;
Normal current voltage is injected into more feed line automatization terminals by more relay protection instrument, wherein every relay protection instrument is corresponding
One line feed terminals;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage;
Fault current voltage wherein will be injected by the artificial Xiang Yitai feed line automatization terminal of a relay protection instrument, scene switch due to
It will not trip in forced regime, all feed line automatization terminals are by device on-off model by wireless 4G network-feedback to test
Host;
Wireless module acquires the feed line automatization terminal on-off model;
Host determines fault message, the upper fault message includes: the position of failure according to the logic of the on-off model
It sets, and, the type of failure.
Selectable, the host is also used to determine the logic of the feed line automatization terminal on-off model;Judge institute
Whether the logic for stating feed line automatization terminal on-off model is correct;
If correct, terminate test;
If incorrect, advised according to the preset logic that the logic of the feed line automatization terminal on-off model is met
Then, fault message is determined.
It is selectable, the generating process of the preset logic rule specifically:
Normal current voltage is injected more feed line automatization terminals by more relay protection instrument;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage, generates preset switching value, institute
The logic for stating preset switching value is preset logic rule.
It is selectable, the wireless module and original wireless public network independent operating simultaneously.
Selectable, relay protection instrument is provided with 4 road electric current delivery outlets, 4 road voltage outputs.The embodiment of the present application shows one kind
The on-the-spot test method and device of the feeder line of type on the spot based on terminal injection method, which comprises described in wireless module acquisition
Feed line automatization terminal on-off model;According to the logic of the on-off model, fault message, the upper fault message are determined
It include: location of fault, and, the type of failure.By the technical solution shown in the embodiment of the present application, can not have a power failure
In the case of realize in operation on the spot type feeder automation carry out on-the-spot test, strong operability;Energy in test process at the scene
It enough avoids intersecting with original wireless public network, it is highly-safe;Survey line road can be treated and realize complete test, improve type feeder line on the spot
The efficiency of system defect is searched in automation before putting into operation;The Reliability of Microprocessor of feeder automation in practical applications is improved, for verifying
The correctness of type feeder automation response policy and action logic provides foundation on the spot.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of on-the-spot test method of the feeder line of type on the spot based on terminal injection method, it is characterised in that the described method includes:
Wireless module acquires the feed line automatization terminal on-off model;
According to the logic of the on-off model, fault message is determined, the upper fault message includes: location of fault, and,
The type of failure.
2. the method according to claim 1, wherein the logic according to on-off model, determines that failure is believed
The step of breath includes:
Determine the logic of the feed line automatization terminal on-off model;Judge the feed line automatization terminal on-off model
Whether logic is correct;
If correct, terminate test;
If incorrect, the preset logic rule met according to the logic of the feed line automatization terminal on-off model, really
Determine fault message.
3. the method according to claim 1, wherein the generating process of preset logic rule specifically:
Normal current voltage is injected more feed line automatization terminals by more relay protection instrument;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage, generates preset switching value, described pre-
The logic for setting switching value is preset logic rule.
4. the method according to claim 1, wherein the wireless module and original wireless public network are independent simultaneously
Operation.
5. the method according to claim 1, wherein to be provided with 4 road electric current delivery outlets, 4 road voltages defeated for relay protection instrument
Outlet.
6. a kind of on-site testing device of the feeder line of type on the spot based on terminal injection method, which is characterized in that described device includes:
Wireless module, and, relay protection instrument, and, module is forced, and, host;
Module is forced in installation on every scene switch of route to be measured, is installed in every line automation terminal of route to be measured
Wireless module;
Normal current voltage is injected into more feed line automatization terminals by more relay protection instrument, wherein every relay protection instrument is one corresponding
Line feed terminals;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage;
Wireless module acquires the feed line automatization terminal on-off model;
Host determines fault message, the upper fault message includes according to the logic of the on-off model: location of fault,
And the type of failure.
7. device according to claim 6, which is characterized in that the host is also used to determine the feed line automatization terminal
The logic of on-off model;Judge whether the logic of the feed line automatization terminal on-off model is correct;
If correct, terminate test;
If incorrect, the preset logic rule met according to the logic of the feed line automatization terminal on-off model, really
Determine fault message.
8. device according to claim 7, which is characterized in that the generating process of the preset logic rule specifically:
Normal current voltage is injected more feed line automatization terminals by more relay protection instrument;
Wherein a relay protection instrument Xiang Yitai feed line automatization terminal injects fault current voltage, generates preset switching value, described pre-
The logic for setting switching value is preset logic rule.
9. device according to claim 6, which is characterized in that the wireless module and original wireless public network are independent simultaneously
Operation.
10. device according to claim 6, which is characterized in that it is defeated that relay protection instrument is provided with 4 road electric current delivery outlets, 4 road voltages
Outlet.
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CN201910006413.3A CN109490681A (en) | 2019-01-04 | 2019-01-04 | The on-the-spot test method and device of the feeder line of type on the spot based on terminal injection method |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111025135A (en) * | 2019-11-11 | 2020-04-17 | 武汉理工大学 | Cloud platform-based test method for on-site FTU coordination control capability |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
CN104007365A (en) * | 2014-06-12 | 2014-08-27 | 国网上海市电力公司 | Feeder automation test method with automatic interference input function |
CN104133463A (en) * | 2013-11-28 | 2014-11-05 | 国家电网公司 | Terminal injection-type feeder automation uninterrupted power test method |
CN206773127U (en) * | 2017-05-17 | 2017-12-19 | 国网山东省电力公司莱芜供电公司 | A kind of distribution net work earthing fault alignment system coordinated with station equipment |
CN107607833A (en) * | 2017-09-04 | 2018-01-19 | 国网江西省电力公司电力科学研究院 | A kind of pocket intelligent distribution type feeder automation test system |
CN108983006A (en) * | 2018-08-10 | 2018-12-11 | 陕西银河天地智能配网技术有限公司 | Type feeder automation switch terminal scene does not have a power failure full-automatic testing method on the spot |
-
2019
- 2019-01-04 CN CN201910006413.3A patent/CN109490681A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
CN104133463A (en) * | 2013-11-28 | 2014-11-05 | 国家电网公司 | Terminal injection-type feeder automation uninterrupted power test method |
CN104007365A (en) * | 2014-06-12 | 2014-08-27 | 国网上海市电力公司 | Feeder automation test method with automatic interference input function |
CN206773127U (en) * | 2017-05-17 | 2017-12-19 | 国网山东省电力公司莱芜供电公司 | A kind of distribution net work earthing fault alignment system coordinated with station equipment |
CN107607833A (en) * | 2017-09-04 | 2018-01-19 | 国网江西省电力公司电力科学研究院 | A kind of pocket intelligent distribution type feeder automation test system |
CN108983006A (en) * | 2018-08-10 | 2018-12-11 | 陕西银河天地智能配网技术有限公司 | Type feeder automation switch terminal scene does not have a power failure full-automatic testing method on the spot |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111025135A (en) * | 2019-11-11 | 2020-04-17 | 武汉理工大学 | Cloud platform-based test method for on-site FTU coordination control capability |
CN111025135B (en) * | 2019-11-11 | 2020-12-01 | 武汉理工大学 | Cloud platform-based test method for on-site FTU coordination control capability |
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