CN108646141A - Fault detector, power supply system and fault judgment method - Google Patents
Fault detector, power supply system and fault judgment method Download PDFInfo
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- CN108646141A CN108646141A CN201810650013.1A CN201810650013A CN108646141A CN 108646141 A CN108646141 A CN 108646141A CN 201810650013 A CN201810650013 A CN 201810650013A CN 108646141 A CN108646141 A CN 108646141A
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- alarm signal
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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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- Locating Faults (AREA)
Abstract
The present invention provides a kind of fault detector, power supply system and fault judgment methods, are related to distribution network automated technical field, including detection device, discriminating gear and warning device, and detection device can detect the fault current of circuit in real time；When detecting fault current, pass through the power direction for the power direction relay Judging fault electric current being arranged in discriminating gear；When the power direction of fault current is positive, warning device exports the first alarm signal；When the power direction of fault current is reversed, warning device exports the second alarm signal.It can solve the problems, such as that conventional failure indicator is difficult to that the fault point of multi-power supply system is accurately positioned by the fault detector, power supply system and fault judgment method, realize quickly and accurately failure judgement point position, it instructs operation maintenance personnel to debug, restore electricity in time, effectively promotes working efficiency.
Description
Technical field
The present invention relates to distribution network automated technical fields, more particularly, to a kind of fault detector, power supply system and event
Hinder judgment method.
Background technology
In distribution automation technology, it usually needs it is positioned in time when power circuit breaks down, shows abort situation,
So that operation maintenance personnel can accurately find rapidly fault point according to the alarm signal of fault detector.
In active distribution network, with the further genralrlization application of distributed energy, the power supply point on circuit increases, circuit
After some upper point breaks down, many fault detectors can be made to send out alarm signal.
Conventional failure indicator is in use, breaks down when the certain point of the power supply system of more power supplys and generates fault current
When, relevant multiple fault detectors can all send out same alarm signal, mislead operations staff, at this time, it is impossible to accurately sentence
The position of disconnected fault point.Therefore, conventional failure indicator is difficult to that the fault point of multi-power supply system is accurately positioned.
Invention content
In view of this, the purpose of the present invention is to provide a kind of fault detector, power supply system and fault judgment method, energy
Enough Judging fault current directions, can solve the problems, such as that conventional failure indicator is difficult to that the position of fault is accurately positioned.
In a first aspect, an embodiment of the present invention provides a kind of fault detector, including detection device, discriminating gear and alarm
Device；
The fault current of the detection device detection circuit；
Power direction relay is provided in the discriminating gear, the power direction relay is used for failure judgement electric current
Power direction；
When the power direction of fault current is positive, the warning device exports the first alarm signal；
When the power direction of fault current is reversed, the warning device exports the second alarm signal.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein institute
It is red direction board to state the first alarm signal, and second alarm signal is yellow direction board.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiments of first aspect, wherein institute
It further includes communication device to state fault detector；When the detection device detects fault current, the communication device is to main website
Send fault message.
Second aspect, the embodiment of the present invention also provide a kind of power supply system, including basic routing line and several branches；
The both ends of the basic routing line are connected with the power grid power supply of substation, open loop operation；
One end of every branch is connect with the basic routing line, and the other end is connected with distributed generation resource；
Every branch road is equipped with the fault detector that the first aspect provides.
In conjunction with second aspect, an embodiment of the present invention provides the first possible embodiments of second aspect, wherein institute
It further includes several fault detectors provided such as the first aspect being arranged on the basic routing line to state power supply system.
In conjunction with second aspect, an embodiment of the present invention provides second of possible embodiments of second aspect, wherein institute
It states on basic routing line, is each both provided with the fault detector with the junction of branch.
The third aspect, the embodiment of the present invention additionally provide a kind of fault judgment method, are carried applied to such as described second aspect
The power supply system of confession, the method includes：
When the fault detector of any branch road exports the first alarm signal, then the fault point of the branch road is judged
Between fault detector and distributed generation resource.
In conjunction with the third aspect, an embodiment of the present invention provides the first possible embodiment of the third aspect, the confessions
Electric system further includes several fault detectors provided such as first aspect being arranged on the basic routing line；
This method includes：When the partial fault indicator on the basic routing line exports the first alarm signal, and part event
When hindering indicator the second alarm signal of output, then failure judgement point is located at the two neighboring failure for exporting different alarm respectively
Between indicator.
In conjunction with the third aspect, the embodiment of the present invention additionally provides second of possible embodiment of the third aspect, wherein
The fault judgment method further includes：
When the warning device of the fault detector on the basic routing line exports the first alarm signal, then failure judgement
Point is located furthest between the fault detector of the power supply and the end of the basic routing line；
When the warning device of the fault detector on the basic routing line exports the second alarm signal, then failure judgement
Point is located most closely between the fault detector of the power supply and the power supply.
Fourth aspect, the embodiment of the present invention additionally provide a kind of non-volatile program code that can perform with processor
Computer-readable medium, wherein said program code makes the processor execute the method that the third aspect provides.
The embodiment of the present invention brings following advantageous effect：An embodiment of the present invention provides a kind of fault detector, power supplies
System and fault judgment method.In the fault detector, detection device can detect the fault current of circuit in real time；Work as detection
When to fault current, pass through the power direction for the power direction relay Judging fault electric current being arranged in discriminating gear；Work as failure
When the power direction of electric current is positive, warning device exports the first alarm signal；When the power direction of fault current is reversed,
Warning device exports the second alarm signal.Therefore, the power direction of fault current can be judged according to the type of alarm signal,
And further learn the position relationship between fault point and fault detector, and so as to realize the accurate positionin of fault point, solution
The problem of conventional failure indicator of having determined is difficult to that the position of fault is accurately positioned.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram of fault detector provided in an embodiment of the present invention；
Fig. 2 is fault indicator principle flow chart provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of power supply system provided in an embodiment of the present invention；
Fig. 4 is fault judgment method schematic diagram one provided in an embodiment of the present invention；
Fig. 5 is fault judgment method schematic diagram two provided in an embodiment of the present invention；
Fig. 6 is fault judgment method schematic diagram three provided in an embodiment of the present invention；
Fig. 7 is failure interpretation method schematic diagram four provided in an embodiment of the present invention；
Fig. 8 is fault judgment method schematic diagram five provided in an embodiment of the present invention；
Icon：
11- detection devices；12- discriminating gears；13- warning devices；14- communication devices；30、31、32、33、34、35、36、
37- fault detectors；40,41,42,43,44- switches.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Fault detector traditional at present is in use, breaks down when the certain point of the power supply system of more power supplys and generates event
When hindering electric current, relevant multiple fault detectors can all send out same alarm signal, mislead operations staff, at this time, it is impossible to
The position of accurate judgement fault point, therefore, conventional failure indicator are difficult to carry out the fault point of the power supply system of more power supplys accurate
Determine position.
Based on this, a kind of fault detector, power supply system and fault judgment method provided in an embodiment of the present invention can be sentenced
Other fault current direction can solve the problems, such as that conventional failure indicator is difficult to that the position of fault is accurately positioned.
For ease of understanding the present embodiment, a kind of fault detector disclosed in the embodiment of the present invention is carried out first
It is discussed in detail.
Embodiment one：
An embodiment of the present invention provides a kind of fault detectors, as shown in Figure 1, the fault detector includes detection device
11, discriminating gear 12 and warning device 13.
Wherein, detection device 11, the fault current for detecting circuit.Power direction relay is provided in discriminating gear 12
Device, the power direction relay are used for failure judgement sense of current.Warning device 13 is used for output alarm signal.When failure electricity
When the power direction of stream is positive, warning device 13 exports the first alarm signal；When the power direction of fault current is reversed,
Warning device 13 exports the second alarm signal.
The fault detector is equipped with reference current Directional Sign, when fault current is identical as reference current direction, then failure
The power direction of electric current is forward direction；When fault current and reference current direction are on the contrary, then the power direction of fault current is reversed.
The fault indicator principle, as shown in Fig. 2, including the following steps：
S201：Original state fault detector is failure to actuate.
S202：Once line failure, detection device 11 can detect circuit mutation current, obtain detection signal.
S203：Judge whether detection device 11 detects that mutation current flows through.If so, thening follow the steps S204；If it is not, then
Execute step S205.
S204：Judge whether the overcurrent time is more than or equal to mutation time, if so, executing step S206；If it is not, executing step
S205。
S205：Under normal circumstances, if not detecting fault current, fault detector is failure to actuate, and warning device 13 is not
Output alarm signal.Direction board is not shown as white when output alarm signal.
S206：The power direction for carrying out fault current judges that, when fault current flows through, power direction relay can be examined
Survey the flow direction of fault current.The big power end of substation of fault current from normal mode flows to load side, with reference current direction
Identical, then the power direction of fault current is forward direction, executes step S207；Substation of the fault current from other improper modes
The power supplys such as big power end, distributed generation resource flow to load side, with reference current direction on the contrary, then the power direction of fault current is
Reversely, step S208 is executed.
S207：Warning device 13 exports the first alarm signal, and the first alarm signal is preferably red direction board.
S208：Warning device 13 exports the second alarm signal, and the second alarm signal is preferably yellow direction board.
S209：Judge whether power off time is more than or equal to 2 seconds, if so, illustrating to cause higher level's switch trip, circuit loses
Pressure, thens follow the steps S210；If it is not, then illustrating switch reclosures success, step S212 is executed.
S210：Fault detector holding acts, and executes step S211 and is judged.
S211：Whether detection supply line restores electricity, if so, thening follow the steps S212；If it is not, thening follow the steps
S210。
S212：Fault detector restPoses.
As a preferred embodiment, fault detector provided in an embodiment of the present invention can further include it is logical
T unit 14.
When detection device detects fault current, communication device sends fault message to main website.By establishing circuit event
The fault detector alarm signal of different situations is sent to master by barrier indicator communication main station using the mode of wireless transmission
It Information applications integrated platform and the tool such as stands processing, then is transmitted to system specified, mobile phone, to be carried for distribution automation system
For important basis for estimation, quickly and accurately failure judgement point position is realized.
In fault detector provided in an embodiment of the present invention, detection device can detect the fault current of circuit in real time；When
When detecting fault current, pass through the power direction for the power direction relay Judging fault electric current being arranged in discriminating gear；When
When the power direction of fault current is positive, warning device exports the first alarm signal；When the power direction of fault current is anti-
Xiang Shi, warning device export the second alarm signal.Therefore, the power of fault current can be judged according to the type of alarm signal
Direction, and further learn the position relationship between fault point and fault detector, so as to realize the accurate fixed of fault point
Position, solves the problems, such as that conventional failure indicator is difficult to that the position of fault is accurately positioned.
Embodiment two：
A kind of power supply system provided in an embodiment of the present invention and its fault judgment method, as shown in figure 3, the power supply system packet
Include basic routing line and several branches.For the present embodiment by taking a branch as an example, which is connected with substation
Power grid power supply, open loop operation；One end of branch is connect with basic routing line, and the other end is connected with distributed generation resource, and props up
Road is equipped with the fault detector of the offer of embodiment one.
A kind of fault judgment method provided in an embodiment of the present invention, the fault judgment method are applied to the power supply system,
Including：When the fault detector of any branch road exports the first alarm signal, then the failure point of the branch road is judged
Between fault detector and distributed generation resource.
As shown in figure 3, the power supply system is the duplicate supply looped network circuit with distributed generation resource, line load is by electricity in system
Source 1 powers, and power supply 2 is the different power supply of circuit offside, and open loop operation, branch line is with distributed generation resource.Basic routing line is equipped with
Switch 40,41, switch 40 are in closed state, and switch 41 is off.Branch line is equipped with fault detector 30, forms event
Hinder range I and II.Under normal circumstances, 30 direction board of fault detector is shown as white；When the power direction of fault current is just
Xiang Shi, warning device export the first alarm signal；When the power direction of fault current is reversed, the second report of warning device output
Alert signal.
When the warning device of fault detector 30 exports the second alarm signal, it can be determined that its fault point is happened at distribution
Between formula power distribution cable fault detector and basic routing line, it is also possible to which fault point is happened on basic routing line, that is, is located at failure
In I region of range；When the warning device of fault detector 30 exports the first alarm signal, it can be determined that its fault point is happened at
On distributed generation resource branch line between fault detector and distributed generation resource, that is, it is located in II region of fault coverage.
A kind of power supply system provided in an embodiment of the present invention and its fault judgment method, the power supply system include basic routing line
And several branches.The basic routing line both ends are connected with the power grid power supply of substation, open loop operation；One end of branch with
Basic routing line connects, and the other end is connected with distributed generation resource, and branch road is equipped with the fault detector of the offer of embodiment one.
When the fault detector of any road exports the first alarm signal, then judge that the fault point of the branch road is located at indicating fault
Between device and distributed generation resource；When any road fault detector exports the second alarm signal, then its fault point is judged
It is happened between distributed generation resource fault of branch line indicator and basic routing line, it is also possible to which fault point is happened on basic routing line.
By the power supply system and fault judgment method, the accurate positionin of fault point can be realized, it is difficult to solve conventional failure indicator
The problem of the position of fault to be accurately positioned.
Embodiment three：
A kind of power supply system provided in an embodiment of the present invention and its fault judgment method, as shown in figure 4, the power supply system packet
Include basic routing line and several branches.The basic routing line both ends are connected with the power grid power supply of substation, open loop operation；Branch
The one end on road is connect with basic routing line, and the other end is connected with distributed generation resource, and branch road is equipped with the offer of embodiment one
Fault detector.The power supply system further includes the fault detector that several embodiments one being arranged on basic routing line provide.Make
The indicating fault of the offer of embodiment one is each both provided with the junction of branch on basic routing line for a preferred embodiment
Device.
As shown in figure 4, the power supply system is the duplicate supply looped network circuit with distributed generation resource, line load is by electricity in system
Source 1 powers, and power supply 2 is the different power supply of circuit offside, and open loop operation, branch line is with distributed generation resource.Basic routing line is equipped with
Switch 42,43,44, switch 42,43 are in closed state, and switch 44 is off.Faulty instruction is distinguished on backbone
Device 31,32,33,34, faulty indicator 35,36,37 respectively on branch line, adjacent fault detector, which encloses to cover, is respectively formed failure
Range I, II, III, IV and V.Under normal circumstances, all fault detector direction boards are shown as white；When fault current flows through event
When hindering indicator, then fault detector acts, warning device output alarm signal.When the power direction of fault current is forward direction
When, warning device exports the first alarm signal, shown in FIG as filled black；When the power direction of fault current is reversed
When, warning device exports the second alarm signal, is filled shown in FIG as oblique line.
A kind of fault judgment method provided in an embodiment of the present invention, this method are applied to the power supply system, the breakdown judge
Method includes following several situations：
(1) when the partial fault indicator on basic routing line exports the first alarm signal, and the output of partial fault indicator
When the second alarm signal, then failure judgement point is located between the two neighboring fault detector of output different alarm respectively.
As shown in figure 4, when fault detector 31 warning device export the first alarm signal, fault detector 32,33,
35,36,37 warning device exports the second alarm signal, and the warning device direction board of fault detector 34 is shown as white, then
It may determine that its fault point is happened between the first alarm signal of output and the two neighboring fault detector of the second alarm signal,
It is located in I region of fault coverage.
Similarly as shown in figure 5, the warning device when fault detector 31,32 exports the first alarm signal, fault detector
33,35,36,37 warning device exports the second alarm signal, and the warning device direction board of fault detector 34 is shown as white,
Then may determine that its fault point be happened at output the first alarm signal and the second alarm signal two neighboring fault detector it
Between, that is, it is located in II region of fault coverage.
Similarly as shown in fig. 6, the warning device when fault detector 31,32,33 exports the first alarm signal, indicating fault
The warning device of device 35,36,37 exports the second alarm signal, and the warning device direction board of fault detector 34 is shown as white,
Then may determine that its fault point be happened at output the first alarm signal and the second alarm signal two neighboring fault detector it
Between, that is, it is located in III region of fault coverage.
(2) when the warning device of the fault detector on basic routing line exports the first alarm signal, then failure judgement
Point is located furthest between the fault detector of power supply and the end of basic routing line.
As shown in fig. 7, the warning device when fault detector 31,32,33,34 exports the first alarm signal, indicating fault
The warning device of device 35,36,37 exports the second alarm signal, then may determine that its fault point is located furthest from the event of power supply
Hinder between indicator and the end of basic routing line, that is, is located in IV region of fault coverage.
(3) when the warning device of the fault detector on basic routing line exports the second alarm signal, then failure judgement
Point is located most closely between the fault detector of power supply and power supply.
As shown in figure 8, when the warning device of fault detector 31,32,33,35,36,37 exports the second alarm signal, therefore
The warning device direction board of barrier indicator 34 is shown as white, then may determine that its fault point is located most closely to the event of power supply
Hinder between indicator and power supply, that is, is located in V region of fault coverage.
Corresponding fault detector the result of the action and fault location region are as shown in the table.
It can similarly derive the case where such fault detector is powered applied to the power supply system by power supply 2, accordingly
Fault detector the result of the action and fault location are as shown in the table.
Power supply system provided in an embodiment of the present invention and its fault judgment method, by quoting the power supply system, Ke Yigen
According to corresponding fault detector alarming result, judges the fault point position of its fault location, will be counted by communication device
According to communication main station is transmitted to, distribution line fault location automation system platform is established.Pass through the power supply system and breakdown judge
Method can realize the accurate positionin of fault point, solve conventional failure indicator and be difficult to that the position of fault is accurately positioned
The problem of, it realizes quickly and accurately failure judgement point position, instructs operation maintenance personnel rapidly removing faults in time, restores to supply
Electricity, to promote working efficiency.
Example IV：
The computer-readable medium of the non-volatile program code provided in an embodiment of the present invention that can perform with processor,
Program code makes processor execute the fault judgment method that embodiment two and embodiment three provide.Computer-readable medium can be set
It sets in communication main station, when detection device detects fault current, communication device sends fault message to main website.By establishing line
Line fault indicator communication main station sends the fault detector alarm signal of different situations using the mode of wireless transmission
Information applications integrated platform and the tool such as handle, then be transmitted to system specified, mobile phone to main website, to be distribution automation
System provides important basis for estimation, realizes quickly and accurately failure judgement point position.Specific implementation can be found in method and implement
Example, details are not described herein.
If function is realized in the form of SFU software functional unit and when sold or used as an independent product, can store
In the non-volatile computer read/write memory medium that a processor can perform.Based on this understanding, skill of the invention
Substantially the part of the part that contributes to existing technology or the technical solution can be with software product in other words for art scheme
Form embody, which is stored in a storage medium, including some instructions use so that one
Computer equipment (can be personal computer, server or the network equipment etc.) executes side described in each embodiment of the present invention
The all or part of step of method.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relatively important
Property.
Finally it should be noted that：Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of fault detector, which is characterized in that including detection device, discriminating gear and warning device；
The fault current of the detection device detection circuit；
Power direction relay is provided in the discriminating gear, the power direction relay is used for the work(of failure judgement electric current
Rate direction；
When the power direction of fault current is positive, the warning device exports the first alarm signal；
When the power direction of fault current is reversed, the warning device exports the second alarm signal.
2. fault detector according to claim 1, which is characterized in that first alarm signal is red direction board,
Second alarm signal is yellow direction board.
3. fault detector according to claim 1, which is characterized in that further include communication device；
When the detection device detects fault current, the communication device sends fault message to main website.
4. a kind of power supply system, which is characterized in that including basic routing line and several branches；
The both ends of the basic routing line are connected with the power grid power supply of substation, open loop operation；
One end of every branch is connect with the basic routing line, and the other end is connected with distributed generation resource；
Every branch road is equipped with fault detector as described in any one of claims 1 to 3.
5. power supply system according to claim 4, which is characterized in that further include be arranged it is several on the basic routing line
A fault detector as described in any one of claims 1 to 3.
6. power supply system according to claim 5, which is characterized in that on the basic routing line, each with the company of branch
The place of connecing is both provided with the fault detector.
7. a kind of fault judgment method, which is characterized in that be applied to power supply system as claimed in claim 4, the method packet
It includes：
When the fault detector of any branch road exports the first alarm signal, then judge that the fault point of the branch road is located at
Between fault detector and distributed generation resource.
8. fault judgment method according to claim 7, which is characterized in that the power supply system further includes being arranged described
Several fault detectors as described in any one of claims 1 to 3 on basic routing line；
The method further includes：
When the partial fault indicator on the basic routing line exports the first alarm signal, and partial fault indicator output second
When alarm signal, then failure judgement point is located between the two neighboring fault detector of output different alarm respectively.
9. fault judgment method according to claim 8, which is characterized in that further include：
When the warning device of the fault detector on the basic routing line exports the first alarm signal, then failure judgement point
In the fault detector farthest away from the power supply and between the end of the basic routing line；
When the warning device of the fault detector on the basic routing line exports the second alarm signal, then failure judgement point
In between the fault detector of the power supply and the power supply.
10. a kind of computer-readable medium for the non-volatile program code that can perform with processor, which is characterized in that described
Program code makes the processor execute described any the method for claim 7 to 9.
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| CN201810650013.1A CN108646141A (en) | 2018-06-21 | 2018-06-21 | Fault detector, power supply system and fault judgment method |
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| CN110261727A (en) * | 2019-05-09 | 2019-09-20 | 北京信息科技大学 | A kind of fault detector and its working method |
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Application publication date: 20181012 |