CN109633376A - Handle the method and device of singlephase earth fault - Google Patents
Handle the method and device of singlephase earth fault Download PDFInfo
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- 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
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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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Abstract
The invention discloses a kind of method and devices for handling singlephase earth fault.Wherein, this method comprises: whether the zero-sequence current value of every route mutates in detection power distribution network；In the case where testing result indicates the above-mentioned zero-sequence current value above-mentioned mutation of generation of any one route, determine that there are singlephase earth faults for above-mentioned any one route；The first warning information is exported by the teletransmission equipment in substation, above-mentioned first warning information is at least used to indicate target object to there are the routes of above-mentioned singlephase earth fault to carry out troubleshooting processing.The present invention solves the specific route that singlephase earth fault can not be accurately positioned in the prior art, and in time handle singlephase earth fault the technical issues of.
Description
Technical field
The present invention relates to distribution network failure process fields, in particular to a kind of method for handling singlephase earth fault
And device.
Background technique
In the prior art, low and medium voltage distribution network mostly uses small current neutral grounding system, according to statistics, in small current neutral grounding system
In, the failure of 80% or more power distribution network is singlephase earth fault, and the prominent advantage of small current neutral grounding system is that single-phase earthing occurs
Fault current is small after failure, and protective device need not act immediately, and system can continue to run 1-2h, opposite to improve the reliable of power supply
Property.
But when single-phase earthing occurs for one feeder line of substation, substation can only alert respective bus bars ground connection, nothing at this time
Method differentiates therefore specific faulty line in case of cannot exclude failure in the short time after singlephase earth fault, may lead
Short trouble is played, results in greater loss, therefore, it is necessary to quick and precisely position singlephase earth fault, and handles single-phase connect in time
Earth fault, to improve the reliability of power supply and the safe and stable operation of power grid.
For above-mentioned problem, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of method and devices for handling singlephase earth fault, at least to solve the prior art
In the specific route of singlephase earth fault can not be accurately positioned, and the technical issues of handle singlephase earth fault in time.
According to an aspect of an embodiment of the present invention, a kind of method for handling singlephase earth fault is provided, comprising: detection
Whether the zero-sequence current value of every route mutates in power distribution network；The above-mentioned zero sequence of any one route is indicated in testing result
In the case that above-mentioned mutation occurs for current value, determine that there are singlephase earth faults for above-mentioned any one route；By in substation
Teletransmission equipment export the first warning information, above-mentioned first warning information is at least used to indicate target object to there are above-mentioned single-phase
The route of ground fault carries out troubleshooting processing.
Further, whether the zero-sequence current value for detecting every route in power distribution network mutates, comprising: detection is above-mentioned every
The current zero-sequence current value of route；The size for comparing above-mentioned current zero-sequence current value and preset zero sequence mutation warning value, obtains
To the first comparison result；If above-mentioned first comparison result is that above-mentioned current zero-sequence current value is greater than or equal to above-mentioned zero sequence mutation announcement
Alert value, it is determined that above-mentioned mutation occurs for above-mentioned zero-sequence current value, if above-mentioned first comparison result is above-mentioned current zero-sequence current value
Warning value is mutated less than above-mentioned zero sequence, it is determined that above-mentioned mutation does not occur for above-mentioned zero-sequence current value.
Further, before whether the zero-sequence current value of every route mutates in detection power distribution network, the above method
Further include: the current parameter value of the arc suppression coil of the above-mentioned every route of detection, wherein above-mentioned current parameter value includes at least: electricity
Anti- value；The size for comparing above-mentioned current parameter value Yu predetermined initial parameter value obtains the second comparison result；If above-mentioned
Two comparison results are that above-mentioned current parameter value and above-mentioned initial parameter value are not of uniform size, then execute every line in detection power distribution network
The step of whether the zero-sequence current value on road mutates.
Further, after whether the zero-sequence current value of every route mutates in detection power distribution network, the above method
Further include: in the case where above-mentioned testing result indicates that above-mentioned mutation does not occur for the zero-sequence current value of above-mentioned every route, then
Determining above-mentioned power distribution network, there are busbar grounding failures；The second warning information, above-mentioned second alarm are exported by above-mentioned teletransmission equipment
Information is at least used to indicate above-mentioned target object and carries out troubleshooting processing to above-mentioned busbar grounding failure.
Further, it is determined that there are singlephase earth faults for above-mentioned any one route, comprising: the above-mentioned any one line of detection
The current residual voltage value on road；The size for comparing above-mentioned current residual voltage value Yu predetermined initial residual voltage value, obtains
To third comparison result；If above-mentioned third comparison result is that above-mentioned current residual voltage value and above-mentioned initial residual voltage value are different
It causes, it is determined that there are single-phase resistance ground faults for above-mentioned any one route, if above-mentioned third comparison result works as leading zero to be above-mentioned
Sequence voltage value is consistent with above-mentioned initial residual voltage value, it is determined that there are single phase metal ground connection events for above-mentioned any one route
Barrier.
According to another aspect of an embodiment of the present invention, a kind of device for handling singlephase earth fault is additionally provided, comprising: the
Whether one detection module, the zero-sequence current value for detecting every route in power distribution network mutate；First determining module, is used for
In the case where testing result indicates the above-mentioned zero-sequence current value above-mentioned mutation of generation of any one route, determine above-mentioned any one
There are singlephase earth faults for route；First alarm module, for passing through teletransmission equipment output the first alarm letter in substation
Breath, above-mentioned first warning information are at least used to indicate target object to there are the routes of above-mentioned singlephase earth fault to carry out failure row
Except processing.
Further, above-mentioned first detection module, comprising: the second detection module, for detecting working as above-mentioned every route
Preceding zero sequence current value；First comparison module is mutated warning value for comparing above-mentioned current zero-sequence current value and preset zero sequence
Size obtains the first comparison result；Second determining module, if being above-mentioned current zero-sequence current value for above-mentioned first comparison result
Warning value is mutated more than or equal to above-mentioned zero sequence, it is determined that above-mentioned mutation occurs for above-mentioned zero-sequence current value, if above-mentioned first compares
As a result it is less than above-mentioned zero sequence for above-mentioned current zero-sequence current value and is mutated warning value, it is determined that above-mentioned zero-sequence current value does not occur above-mentioned
Mutation.
Further, above-mentioned apparatus further include: third detection module, for detecting the arc suppression coil of above-mentioned every route
Current parameter value, wherein above-mentioned current parameter value includes at least: reactance value；Second comparison module, for comparing above-mentioned current ginseng
The size of numerical value and predetermined initial parameter value obtains the second comparison result；Execution module, if being compared for above-mentioned second
As a result not of uniform size for above-mentioned current parameter value and above-mentioned initial parameter value, then execute above-mentioned first detection module.
Further, above-mentioned apparatus further include: third determining module, for indicating above-mentioned every line in above-mentioned testing result
In the case that above-mentioned mutation does not occur for the zero-sequence current value on road, it is determined that there are busbar grounding failures for above-mentioned power distribution network；Second
Alarm module, for exporting the second warning information by above-mentioned teletransmission equipment, above-mentioned second warning information is at least used to indicate
It states target object and troubleshooting processing is carried out to above-mentioned busbar grounding failure.
According to another aspect of an embodiment of the present invention, a kind of storage medium is additionally provided, above-mentioned storage medium includes storage
Program, wherein equipment where controlling above-mentioned storage medium in above procedure operation executes the above-mentioned processing list of any one
The method of phase ground fault.
According to another aspect of an embodiment of the present invention, a kind of processor is additionally provided, above-mentioned processor is used to run program,
Wherein, the method for the above-mentioned processing singlephase earth fault of any one is executed when above procedure is run.
In embodiments of the present invention, whether mutated by the zero-sequence current value of every route in detection power distribution network；?
In the case that testing result indicates that above-mentioned mutation occurs for the above-mentioned zero-sequence current value of any one route, above-mentioned any one is determined
There are singlephase earth faults for route；The first warning information, above-mentioned first warning information are exported by the teletransmission equipment in substation
Target object is at least used to indicate to there are the routes of above-mentioned singlephase earth fault to carry out troubleshooting processing, has reached quick standard
It determines the specific route of position singlephase earth fault, and handles the purpose of singlephase earth fault in time, to realize raising power supply
Reliability and power grid safe and stable operation technical effect, and then solve can not be accurately positioned in the prior art it is single-phase
The specific route of ground fault, and in time handle singlephase earth fault the technical issues of.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of flow chart of method for handling singlephase earth fault according to an embodiment of the present invention；
Fig. 2 is a kind of flow chart of the method for optional processing singlephase earth fault according to an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of device for handling singlephase earth fault according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
According to embodiments of the present invention, a kind of embodiment of method for handling singlephase earth fault is provided, needs to illustrate
It is that step shown in the flowchart of the accompanying drawings can execute in a computer system such as a set of computer executable instructions,
Also, although logical order is shown in flow charts, and it in some cases, can be to be different from sequence execution herein
Shown or described step.
Fig. 1 is a kind of flow chart of method for handling singlephase earth fault according to an embodiment of the present invention, as shown in Figure 1,
This method comprises the following steps:
Whether step S102, the zero-sequence current value for detecting every route in power distribution network mutate；
Step S104 indicates that there is a situation where above-mentioned mutation for the above-mentioned zero-sequence current value of any one route in testing result
Under, determine that there are singlephase earth faults for above-mentioned any one route；
Step S106 exports the first warning information by the teletransmission equipment in substation, and above-mentioned first warning information is at least
Target object is used to indicate to there are the routes of above-mentioned singlephase earth fault to carry out troubleshooting processing.
It should be noted that due in any one route there are in the case where singlephase earth fault, zero-sequence current value
It can mutate, therefore, can be in such a way that whether the zero-sequence current value of every route in detection power distribution network mutates, really
Any one route in power distribution network is determined with the presence or absence of singlephase earth fault.
Optionally, above-mentioned singlephase earth fault can be, but not limited to include: that single phase metal ground fault, single-phase resistance connect
Earth fault etc..
For example, when single phase metal ground fault occurs for any one route, due to the current parameter value of arc suppression coil
The change of (for example, reactance value of arc suppression coil) can cause the size for compensating electric current to change, and compensate size of current
Variation can be only reflected in the zero-sequence current value of faulty line；For another example when single-phase resistance ground connection event occurs for any one route
When barrier, since the change of the current parameter value of arc suppression coil can equally cause the variation of fault current, so as to cause residual voltage
Value changes, and the variation of residual voltage value can make the zero-sequence current value of each route all change, at this time by zero sequence electricity
Under flow valuve conversion to same voltage, the variation for compensating size of current also can be only reflected in the zero-sequence current value of faulty line.
Optionally, above-mentioned teletransmission equipment can be, but not limited to as communication apparatus, for example, wire communication equipment, wireless telecommunications
Equipment etc.；The management that above-mentioned teletransmission equipment can be, but not limited to for above-mentioned first warning information being sent to above-mentioned target object is whole
On the handheld terminal of end or above-mentioned target object；Above-mentioned target object can be, but not limited to as staff, for example, regulation
Personnel, trouble hunting personnel, troubleshooting personnel etc..
It in the embodiment of the present application, can be by the zero-sequence current value of every route in detection power distribution network, and by the zero sequence
Current value is compared with preset zero sequence mutation warning value, obtains the first comparison result, and be in above-mentioned first comparison result
In the case that above-mentioned current zero-sequence current value is greater than or equal to above-mentioned zero sequence mutation warning value, it is determined that above-mentioned zero-sequence current value hair
Raw above-mentioned mutation；Can determining the corresponding any one route of the zero-sequence current value of mutation in turn, there are single-phase earthing events
Barrier；And the first warning information is exported by the teletransmission equipment in substation, to indicate target object to there are above-mentioned single-phase earthings
The route of failure carries out troubleshooting processing.
It still needs to it is noted that the method for processing singlephase earth fault provided by the embodiment of the present application can be, but not limited to
Applied in the protective device of substation line, ground path is judged by using zero sequence figure quantity method, it is real to rely on route protection
Existing ground path differentiates that this method is quickly, accurately, practical.
For example, can in substation by switchgear short envelope zero sequence secondary circuit access protective device, based on this
Apply for the method upgrading protection internal processes of the processing singlephase earth fault of embodiment, and preset zero sequence is mutated warning value
(setting principle can be, but not limited to through traffic departments at different levels according to system parameter, method of operation etc.).And determining above-mentioned
Anticipating, there are in the case of singlephase earth fault, automate teletransmission equipment into station by protective device to pass warning information for a route
It send to regulation personnel, earthing wire-selecting function can be realized.
In embodiments of the present invention, whether mutated by the zero-sequence current value of every route in detection power distribution network；?
In the case that testing result indicates that above-mentioned mutation occurs for the above-mentioned zero-sequence current value of any one route, above-mentioned any one is determined
There are singlephase earth faults for route；The first warning information, above-mentioned first warning information are exported by the teletransmission equipment in substation
Target object is at least used to indicate to there are the routes of above-mentioned singlephase earth fault to carry out troubleshooting processing, has reached quick standard
It determines the specific route of position singlephase earth fault, and handles the purpose of singlephase earth fault in time, to realize raising power supply
Reliability and power grid safe and stable operation technical effect, and then solve can not be accurately positioned in the prior art it is single-phase
The specific route of ground fault, and in time handle singlephase earth fault the technical issues of.
In an alternative embodiment, Fig. 2 is a kind of optional processing single-phase earthing event according to an embodiment of the present invention
The flow chart of the method for barrier, as shown in Fig. 2, whether the zero-sequence current value of every route mutates in detection power distribution network, comprising:
Step S202 detects the current zero-sequence current value of above-mentioned every route；
Step S204 compares the size of above-mentioned current zero-sequence current value and preset zero sequence mutation warning value, obtains first
Comparison result；
Step S206, if above-mentioned first comparison result is that above-mentioned current zero-sequence current value is mutated more than or equal to above-mentioned zero sequence
Warning value, it is determined that above-mentioned mutation occurs for above-mentioned zero-sequence current value, if above-mentioned first comparison result is above-mentioned current zero-sequence current
Value is less than above-mentioned zero sequence and is mutated warning value, it is determined that above-mentioned mutation does not occur for above-mentioned zero-sequence current value.
In the embodiment of the present application, it by the current zero-sequence current value of every route in detection power distribution network, and compares
The size for stating current zero-sequence current value and preset zero sequence mutation warning value, obtains the first comparison result；It can be according to the first ratio
Whether above-mentioned zero-sequence current value, which occurs above-mentioned mutation, is determined to result.
It should be noted that the specific value range of above-mentioned zero sequence mutation warning value, the application do not limit specifically, with can
It is subject to and realizes the embodiment of the present application.
In an alternative embodiment, whether the zero-sequence current value of every route mutates it in detection power distribution network
Before, the above method further include:
Step S302 detects the current parameter value of the arc suppression coil of above-mentioned every route, wherein above-mentioned current parameter value is extremely
It less include: reactance value；
Step S304 compares the size of above-mentioned current parameter value Yu predetermined initial parameter value, obtains the second comparison
As a result；
Step S306, if above-mentioned second comparison result is that above-mentioned current parameter value and above-mentioned initial parameter value are not of uniform size
It causes, then the step of whether the zero-sequence current value of every route mutates in detection power distribution network is executed.
In the embodiment of the present application, when occurring due to singlephase earth fault, the current parameter value of arc suppression coil is (for example, electricity
Anti- value) it can change, and the change of zero-sequence current value in the circuit that singlephase earth fault occurs is caused therefore to execute inspection
Before being measured the step of whether the zero-sequence current value of every route in power grid mutates, every can be detected in power distribution network in advance
The current parameter value of the arc suppression coil of route disappears when above-mentioned current parameter value and above-mentioned initial parameter value are not of uniform size
When the current parameter value of arc coil changes, whether the zero-sequence current value for executing every route in detection power distribution network mutates
The step of.
In an alternative embodiment, whether the zero-sequence current value of every route mutates it in detection power distribution network
Afterwards, the above method further include:
Step S402 indicates that above-mentioned mutation does not occur for the zero-sequence current value of above-mentioned every route in above-mentioned testing result
In the case of, it is determined that there are busbar grounding failures for above-mentioned power distribution network；
Step S404 exports the second warning information by above-mentioned teletransmission equipment, and above-mentioned second warning information is at least used to refer to
Show that above-mentioned target object carries out troubleshooting processing to above-mentioned busbar grounding failure.
In above-mentioned optional embodiment, due to indicating that the above-mentioned zero-sequence current value of any one route is sent out in testing result
In the case where raw above-mentioned mutation, determine that there are singlephase earth faults for above-mentioned any one route, correspondingly, in above-mentioned testing result
In the case where indicating that above-mentioned mutation does not occur for the zero-sequence current value of above-mentioned every route, it is determined that there are buses for above-mentioned power distribution network
Ground fault exports the second warning information by above-mentioned teletransmission equipment, to indicate above-mentioned target object to above-mentioned busbar grounding event
Barrier carries out troubleshooting processing.
Optionally, the mode that above-mentioned teletransmission equipment exports the second warning information can be, but not limited to believe with the first alarm of output
The mode of breath is identical, for example, above-mentioned teletransmission equipment can be, but not limited to above-mentioned second warning information being sent to above-mentioned target pair
On the handheld terminal of the management terminal of elephant or above-mentioned target object；Above-mentioned target object can be, but not limited to as staff,
For example, regulation personnel, trouble hunting personnel, troubleshooting personnel etc..
In an alternative embodiment, determine that there are singlephase earth faults for above-mentioned any one route, comprising:
Step S502 detects the current residual voltage value of above-mentioned any one route；
Step S504 compares the size of above-mentioned current residual voltage value and predetermined initial residual voltage value, obtains
Third comparison result；
Step S506, if above-mentioned third comparison result be above-mentioned current residual voltage value and above-mentioned initial residual voltage value not
Unanimously, it is determined that there are single-phase resistance ground faults for above-mentioned any one route, if above-mentioned third comparison result is above-mentioned current
Residual voltage value is consistent with above-mentioned initial residual voltage value, it is determined that there are single phase metal ground connection events for above-mentioned any one route
Barrier.
As a kind of optional embodiment, since singlephase earth fault at least may include with Types Below: single phase metal
Ground fault, single-phase resistance ground fault, therefore, determine any one route there are in the case where singlephase earth fault, also
Whether the current residual voltage value that can analyze above-mentioned any one route changes, determine there is currently single-phase earthing therefore
The concrete type of barrier, to realize that specific aim carries out troubleshooting processing.
Specifically, in the embodiment of the present application, by detecting the current residual voltage value of above-mentioned any one route, and comparing
To the size of above-mentioned current residual voltage value and predetermined initial residual voltage value, if above-mentioned current residual voltage value with it is upper
It is inconsistent to state initial residual voltage value, it is determined that above-mentioned any one route is above-mentioned to work as leading zero there are single-phase resistance ground fault
Sequence voltage value is consistent with above-mentioned initial residual voltage value, it is determined that there are single phase metal ground connection events for above-mentioned any one route
Barrier.
It should be noted that the specific value range of above-mentioned initial residual voltage value, the application do not limit specifically, with can
It is subject to and realizes the embodiment of the present application.
Below by way of an optional embodiment, to handling singlephase earth fault provided by the above embodiments of the present application
Method schematically illustrated:
In a kind of optional embodiment, it is assumed that single-phase earthing occurs for the N articles route drawn from substation's leading-out terminal
Failure, arc suppression coil parameter change front and back, the reactance value of arc suppression coil is respectively XL1And XL2, residual voltage value is respectivelyWithIf zero-sequence current value of each branch before and after the reactance value of arc suppression coil changes is respectively
WithThe direct-to-ground capacitance value of each route is respectively C1,C2,...CN-1,CN。
The zero-sequence current value of non-fault line are as follows:
The zero-sequence current value of faulty line are as follows:
After arc suppression coil parameter change, the zero-sequence current value of non-fault line are as follows:
The zero-sequence current value of faulty line are as follows:
When since single phase metal ground fault occurs, the zero sequence electricity of the reactance value of arc suppression coil power distribution network before and after change
Pressure value is basically unchanged, i.e.,Therefore the zero-sequence current of each branch in reactance value variation front and back of arc suppression coil can be found out
The knots modification of value.
When single-phase resistance ground fault occurs for the N articles route, the reactance value of arc suppression coil is before and after change, non-faulting line
The same formula of zero-sequence current value (1)-(4) of the zero-sequence current value and faulty line on road.
Since the change of the reactance value of arc suppression coil causes the variation of fault current, residual voltage is caused to change, meeting
So that the zero-sequence current of each route is all changed, is obtained by formula (1) and (3), i.e.,That is:
If can be gone under the zero-sequence current value conversion to the same voltage that the reactance value of arc suppression coil is changed to front and back
Except residual voltage variation bring influences, Ze Ge branch zero-sequence current Sudden Changing Rate equation:
When under the zero-sequence current value conversion to same voltage that the reactance value of arc suppression coil changes front and back, the electricity of arc suppression coil
The change of anti-value only results in the variation of the zero-sequence current in faulty line, on this basis, constructs following criterion:
Any one corresponding route is the route there are singlephase earth fault；If every route is in arc blowout wire
After the reactance value transformation of circleIt is equal to zero, it is determined that there are busbar grounding failures for above-mentioned power distribution network.
Embodiment 2
According to embodiments of the present invention, it additionally provides a kind of for implementing the device of the method for above-mentioned processing singlephase earth fault
Embodiment, Fig. 3 is a kind of structural schematic diagram of device for handling singlephase earth fault according to an embodiment of the present invention, such as Fig. 3 institute
Show, the device of above-mentioned processing singlephase earth fault, comprising: first detection module 30, the first determining module 32 and the first alarm mould
Block 34, in which:
Whether first detection module 30, the zero-sequence current value for detecting every route in power distribution network mutate；First
Determining module 32, for indicating that there is a situation where above-mentioned mutation for the above-mentioned zero-sequence current value of any one route in testing result
Under, determine that there are singlephase earth faults for above-mentioned any one route；First alarm module 34, for passing through the teletransmission in substation
Equipment exports the first warning information, and above-mentioned first warning information is at least used to indicate target object to there are above-mentioned single-phase earthing events
The route of barrier carries out troubleshooting processing.
It should be noted that above-mentioned modules can be realized by software or hardware, for example, for the latter,
Can be accomplished by the following way: above-mentioned modules can be located in same processor；Alternatively, above-mentioned modules are with any
Combined mode is located in different processors.
Herein it should be noted that above-mentioned first detection module 30, the first determining module 32 and the first alarm module 34 are right
Should be in the step S102 to step S106 in embodiment 1, example and application scenarios that above-mentioned module and corresponding step are realized
It is identical, but it is not limited to the above embodiments 1 disclosure of that.It should be noted that above-mentioned module can as a part of device
To operate in terminal.
In an alternative embodiment, above-mentioned first detection module, comprising: the second detection module, it is above-mentioned for detecting
The current zero-sequence current value of every route；First comparison module, for comparing above-mentioned current zero-sequence current value and preset zero sequence
It is mutated the size of warning value, obtains the first comparison result；Second determining module, if being above-mentioned work as above-mentioned first comparison result
Preceding zero sequence current value is greater than or equal to above-mentioned zero sequence and is mutated warning value, it is determined that and above-mentioned mutation occurs for above-mentioned zero-sequence current value, if
Above-mentioned first comparison result is that above-mentioned current zero-sequence current value is less than above-mentioned zero sequence mutation warning value, it is determined that above-mentioned zero-sequence current
Above-mentioned mutation does not occur for value.
In an alternative embodiment, above-mentioned apparatus further include: third detection module, for detecting above-mentioned every route
Arc suppression coil current parameter value, wherein above-mentioned current parameter value includes at least: reactance value；Second comparison module, for than
To the size of above-mentioned current parameter value and predetermined initial parameter value, the second comparison result is obtained；Execution module, if for
Above-mentioned second comparison result is that above-mentioned current parameter value and above-mentioned initial parameter value are not of uniform size, then executes above-mentioned first detection
Module.
In an alternative embodiment, above-mentioned apparatus further include: third determining module, for referring in above-mentioned testing result
In the case where showing that above-mentioned mutation does not occur for the zero-sequence current value of above-mentioned every route, it is determined that there are buses to connect for above-mentioned power distribution network
Earth fault；Second alarm module, for exporting the second warning information by above-mentioned teletransmission equipment, above-mentioned second warning information is at least
It is used to indicate above-mentioned target object and troubleshooting processing is carried out to above-mentioned busbar grounding failure.
It should be noted that above-mentioned modules can be realized by software or hardware, for example, for the latter,
Can be accomplished by the following way: above-mentioned modules can be located in same processor；Alternatively, above-mentioned modules are with any
Combined mode is located in different processors.
It should be noted that the optional or preferred embodiment of the present embodiment may refer to the associated description in embodiment 1,
Details are not described herein again.
The device of above-mentioned processing singlephase earth fault can also include processor and memory, above-mentioned first detection module
30, the first determining module 32 and the first alarm module 34 etc. store in memory as program unit, are executed by processor
Above procedure unit stored in memory realizes corresponding function.
Include kernel in processor, is gone in memory to transfer corresponding program unit by kernel, above-mentioned kernel can be set
One or more.Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM)
And/or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one
Storage chip.
According to the embodiment of the present application, a kind of storage medium embodiment is additionally provided.Optionally, in the present embodiment, above-mentioned
Storage medium includes the program of storage, wherein equipment where controlling above-mentioned storage medium in above procedure operation executes above-mentioned
The method of any one processing singlephase earth fault.
Optionally, in the present embodiment, above-mentioned storage medium can be located in computer network in computer terminal group
In any one terminal, or in any one mobile terminal in mobile terminal group, above-mentioned storage medium packet
Include the program of storage.
Optionally, when program is run, equipment where control storage medium executes following functions: every in detection power distribution network
Whether the zero-sequence current value of route mutates；In the above-mentioned zero-sequence current value generation that testing result indicates any one route
In the case where stating mutation, determine that there are singlephase earth faults for above-mentioned any one route；It is defeated by the teletransmission equipment in substation
First warning information out, above-mentioned first warning information are at least used to indicate target object to there are the lines of above-mentioned singlephase earth fault
Road carries out troubleshooting processing.
Optionally, when program is run, equipment where control storage medium executes following functions: the above-mentioned every route of detection
Current zero-sequence current value；The size for comparing above-mentioned current zero-sequence current value and preset zero sequence mutation warning value, obtains first
Comparison result；If above-mentioned first comparison result is that above-mentioned current zero-sequence current value is greater than or equal to above-mentioned zero sequence mutation warning value,
Then determine that above-mentioned mutation occurs for above-mentioned zero-sequence current value, if above-mentioned first comparison result is above-mentioned current zero-sequence current value less than upper
State zero sequence mutation warning value, it is determined that above-mentioned mutation does not occur for above-mentioned zero-sequence current value.
Optionally, when program is run, equipment where control storage medium executes following functions: the above-mentioned every route of detection
Arc suppression coil current parameter value, wherein above-mentioned current parameter value includes at least: reactance value；Compare above-mentioned current parameter value
With the size of predetermined initial parameter value, the second comparison result is obtained；If above-mentioned second comparison result is above-mentioned current ginseng
Numerical value and above-mentioned initial parameter value are not of uniform size, then whether the zero-sequence current value for executing every route in detection power distribution network occurs
The step of mutation.
Optionally, when program is run, equipment where control storage medium executes following functions: referring in above-mentioned testing result
In the case where showing that above-mentioned mutation does not occur for the zero-sequence current value of above-mentioned every route, it is determined that there are buses to connect for above-mentioned power distribution network
Earth fault；The second warning information is exported by above-mentioned teletransmission equipment, above-mentioned second warning information is at least used to indicate above-mentioned target
Object carries out troubleshooting processing to above-mentioned busbar grounding failure.
Optionally, when program is run, equipment where control storage medium executes following functions: detection above-mentioned any one
The current residual voltage value of route；The size of above-mentioned current residual voltage value Yu predetermined initial residual voltage value is compared,
Obtain third comparison result；If above-mentioned third comparison result be above-mentioned current residual voltage value and above-mentioned initial residual voltage value not
Unanimously, it is determined that there are single-phase resistance ground faults for above-mentioned any one route, if above-mentioned third comparison result is above-mentioned current
Residual voltage value is consistent with above-mentioned initial residual voltage value, it is determined that there are single phase metal ground connection events for above-mentioned any one route
Barrier.
According to the embodiment of the present application, a kind of processor embodiment is additionally provided.Optionally, in the present embodiment, above-mentioned place
Reason device is for running program, wherein above procedure executes any one of the above processing singlephase earth fault method when running.
The embodiment of the present application provides a kind of equipment, equipment include processor, memory and storage on a memory and can
The program run on a processor, processor perform the steps of the zero sequence of every route in detection power distribution network when executing program
Whether current value mutates；Indicate that the feelings of above-mentioned mutation occur for the above-mentioned zero-sequence current value of any one route in testing result
Under condition, determine that there are singlephase earth faults for above-mentioned any one route；Pass through the first alarm of teletransmission equipment output in substation
Information, above-mentioned first warning information are at least used to indicate target object to there are the routes of above-mentioned singlephase earth fault to carry out failure
Exclusion processing.
Optionally, when above-mentioned processor executes program, the current zero-sequence current value of above-mentioned every route can also be detected；Than
To the size of above-mentioned current zero-sequence current value and preset zero sequence mutation warning value, the first comparison result is obtained；If above-mentioned first
Comparison result is that above-mentioned current zero-sequence current value is greater than or equal to above-mentioned zero sequence mutation warning value, it is determined that above-mentioned zero-sequence current value
Above-mentioned mutation occurs, if above-mentioned first comparison result is that above-mentioned current zero-sequence current value is less than above-mentioned zero sequence mutation warning value,
Determine that above-mentioned mutation does not occur for above-mentioned zero-sequence current value.
Optionally, when above-mentioned processor executes program, the current ginseng of the arc suppression coil of above-mentioned every route can also be detected
Numerical value, wherein above-mentioned current parameter value includes at least: reactance value；Compare above-mentioned current parameter value and predetermined initial ginseng
The size of numerical value obtains the second comparison result；If above-mentioned second comparison result is above-mentioned current parameter value and above-mentioned initial parameter
It is worth not of uniform size, then the step of whether the zero-sequence current value of every route mutates in detection power distribution network is executed.
Optionally, when above-mentioned processor executes program, the zero of above-mentioned every route can also be indicated in above-mentioned testing result
In the case that above-mentioned mutation does not occur for sequence current value, it is determined that there are busbar grounding failures for above-mentioned power distribution network；By above-mentioned remote
It passes equipment and exports the second warning information, above-mentioned second warning information is at least used to indicate above-mentioned target object to above-mentioned busbar grounding
Failure carries out troubleshooting processing.
Optionally, when above-mentioned processor executes program, the current residual voltage of above-mentioned any one route can also be detected
Value；The size for comparing above-mentioned current residual voltage value Yu predetermined initial residual voltage value, obtains third comparison result；If
Above-mentioned third comparison result is that above-mentioned current residual voltage value and above-mentioned initial residual voltage value are inconsistent, it is determined that above-mentioned any
One route is there are single-phase resistance ground fault, if above-mentioned third comparison result is above-mentioned current residual voltage value and above-mentioned initial
Residual voltage value is consistent, it is determined that there are single phase metal ground faults for above-mentioned any one route.
Present invention also provides a kind of computer program products, when executing on data processing equipment, are adapted for carrying out just
The program of beginningization there are as below methods step: whether the zero-sequence current value of every route mutates in detection power distribution network；It is detecting
As a result in the case where indicating that above-mentioned mutation occurs for the above-mentioned zero-sequence current value of any one route, above-mentioned any one route is determined
There are singlephase earth faults；The first warning information is exported by the teletransmission equipment in substation, above-mentioned first warning information is at least
Target object is used to indicate to there are the routes of above-mentioned singlephase earth fault to carry out troubleshooting processing.
Optionally, when above-mentioned computer program product executes program, the current zero sequence of above-mentioned every route can also be detected
Current value；The size for comparing above-mentioned current zero-sequence current value and preset zero sequence mutation warning value, obtains the first comparison result；If
Above-mentioned first comparison result is that above-mentioned current zero-sequence current value is greater than or equal to above-mentioned zero sequence mutation warning value, it is determined that above-mentioned zero
Above-mentioned mutation occurs for sequence current value, if above-mentioned first comparison result is that above-mentioned current zero-sequence current value is less than above-mentioned zero sequence mutation announcement
Alert value, it is determined that above-mentioned mutation does not occur for above-mentioned zero-sequence current value.
Optionally, when above-mentioned computer program product executes program, the arc suppression coil of above-mentioned every route can also be detected
Current parameter value, wherein above-mentioned current parameter value includes at least: reactance value；It compares above-mentioned current parameter value and predefines
Initial parameter value size, obtain the second comparison result；If above-mentioned second comparison result be above-mentioned current parameter value with it is above-mentioned
Initial parameter value is not of uniform size, then executes the step whether the zero-sequence current value of every route in detection power distribution network mutates
Suddenly.
Optionally, when above-mentioned computer program product executes program, above-mentioned every can also be indicated in above-mentioned testing result
In the case that above-mentioned mutation does not occur for the zero-sequence current value of route, it is determined that there are busbar grounding failures for above-mentioned power distribution network；It is logical
It crosses above-mentioned teletransmission equipment and exports the second warning information, above-mentioned second warning information is at least used to indicate above-mentioned target object to above-mentioned
Busbar grounding failure carries out troubleshooting processing.
Optionally, when above-mentioned computer program product executes program, the current of above-mentioned any one route can also be detected
Residual voltage value；The size for comparing above-mentioned current residual voltage value Yu predetermined initial residual voltage value, obtains third ratio
To result；If above-mentioned third comparison result is that above-mentioned current residual voltage value and above-mentioned initial residual voltage value are inconsistent, really
There are single-phase resistance ground faults for fixed above-mentioned any one route, if above-mentioned third comparison result is above-mentioned current residual voltage value
It is consistent with above-mentioned initial residual voltage value, it is determined that there are single phase metal ground faults for above-mentioned any one route.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
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, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (11)
1. a kind of method for handling singlephase earth fault characterized by comprising
Whether the zero-sequence current value of every route mutates in detection power distribution network；
In the case where testing result indicates the zero-sequence current value generation mutation of any one route, described appoint is determined
Anticipating, there are singlephase earth faults for a route；
The first warning information is exported by the teletransmission equipment in substation, first warning information is at least used to indicate target pair
As to there are the routes of the singlephase earth fault to carry out troubleshooting processing.
2. the method according to claim 1, wherein detection power distribution network in every route zero-sequence current value whether
It mutates, comprising:
Detect the current zero-sequence current value of every route；
The size for comparing the current zero-sequence current value and preset zero sequence mutation warning value, obtains the first comparison result；
If first comparison result is that the current zero-sequence current value is greater than or equal to zero sequence mutation warning value, it is determined that
The mutation occurs for the zero-sequence current value, if first comparison result is that the current zero-sequence current value is less than the zero sequence
It is mutated warning value, it is determined that the mutation does not occur for the zero-sequence current value.
3. the method according to claim 1, wherein the zero-sequence current value of every route is in detection power distribution network
Before no mutation, the method also includes:
Detect the current parameter value of the arc suppression coil of every route, wherein the current parameter value includes at least: reactance
Value；
The size for comparing the current parameter value Yu predetermined initial parameter value obtains the second comparison result；
If second comparison result is that the current parameter value and the initial parameter value are not of uniform size, executes detection and match
The step of whether the zero-sequence current value of every route mutates in power grid.
4. the method according to claim 1, wherein the zero-sequence current value of every route is in detection power distribution network
After no mutation, the method also includes:
In the case where the testing result indicates that the mutation does not occur for the zero-sequence current value of every route, it is determined that
There are busbar grounding failures for the power distribution network；
The second warning information is exported by the teletransmission equipment, second warning information is at least used to indicate the target object
Troubleshooting processing is carried out to the busbar grounding failure.
5. the method according to claim 1, wherein determining any one route, there are single-phase earthing events
Barrier, comprising:
Detect the current residual voltage value of any one route；
The size for comparing the current residual voltage value Yu predetermined initial residual voltage value, obtains third comparison result；
If the third comparison result is that the current residual voltage value and the initial residual voltage value are inconsistent, it is determined that institute
Stating any one route, there are single-phase resistance ground faults, if the third comparison result is the current residual voltage value and institute
It is consistent to state initial residual voltage value, it is determined that there are single phase metal ground faults for any one route.
6. a kind of device for handling singlephase earth fault characterized by comprising
Whether first detection module, the zero-sequence current value for detecting every route in power distribution network mutate；
First determining module, for indicating that the mutation occurs for the zero-sequence current value of any one route in testing result
In the case of, determine that there are singlephase earth faults for any one route；
First alarm module, for exporting the first warning information, first warning information by the teletransmission equipment in substation
Target object is at least used to indicate to there are the routes of the singlephase earth fault to carry out troubleshooting processing.
7. device according to claim 6, which is characterized in that the first detection module, comprising:
Second detection module, for detecting the current zero-sequence current value of every route；
First comparison module is obtained for comparing the size of the current zero-sequence current value and preset zero sequence mutation warning value
First comparison result；
Second determining module, if being that the current zero-sequence current value is greater than or equal to the zero sequence for first comparison result
It is mutated warning value, it is determined that the mutation occurs for the zero-sequence current value, if first comparison result is the current zero sequence
Current value is less than the zero sequence and is mutated warning value, it is determined that the mutation does not occur for the zero-sequence current value.
8. device according to claim 6, which is characterized in that described device further include:
Third detection module, the current parameter value of the arc suppression coil for detecting every route, wherein the parameter current
Value includes at least: reactance value；
Second comparison module obtains second for comparing the size of the current parameter value Yu predetermined initial parameter value
Comparison result；
Execution module, if being that the current parameter value and the initial parameter value are not of uniform size for second comparison result
It causes, then executes the first detection module.
9. device according to claim 6, which is characterized in that described device further include:
Third determining module, for indicating that it is described prominent that the zero-sequence current value of every route does not occur in the testing result
In the case where change, it is determined that there are busbar grounding failures for the power distribution network；
Second alarm module, for exporting the second warning information by the teletransmission equipment, second warning information is at least used
Troubleshooting processing is carried out to the busbar grounding failure in the instruction target object.
10. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein run in described program
When control the storage medium where equipment perform claim require any one of 1 to 5 described in processing singlephase earth fault
Method.
11. a kind of processor, which is characterized in that the processor is for running program, wherein right of execution when described program is run
Benefit require any one of 1 to 5 described in handle singlephase earth fault method.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152191A (en) * | 2020-09-01 | 2020-12-29 | 国网陕西省电力公司榆林供电公司 | Fault processing method, device and storage medium for distribution line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1349103A (en) * | 2000-10-18 | 2002-05-15 | 深圳市中兴通讯股份有限公司 | Judgement method of one-phase earthing failure in electric distribution network |
| CN1423132A (en) * | 2001-11-28 | 2003-06-11 | 淄博科汇电气有限公司 | Small-current earth fault switch-selecting and sectioning method for power system |
| CN106226651A (en) * | 2016-07-12 | 2016-12-14 | 国电南瑞科技股份有限公司 | A kind of overhead type indicating fault location terminal and voltage-to-ground measuring method |
| CN107462805A (en) * | 2017-10-09 | 2017-12-12 | 国网山东省电力公司临沂供电公司 | A kind of short circuit fault of power distribution network protection and localization method |
| CN107526005A (en) * | 2017-07-31 | 2017-12-29 | 李景禄 | A kind of Sudden Changing Rate of singlephase earth fault processing unit starts method |
| CN108693439A (en) * | 2017-04-07 | 2018-10-23 | 南京南瑞继保电气有限公司 | A kind of small current neutral grounding system multi-line is the same as phase single-phase grounding selecting method |
-
2018
- 2018-12-21 CN CN201811575026.3A patent/CN109633376A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1349103A (en) * | 2000-10-18 | 2002-05-15 | 深圳市中兴通讯股份有限公司 | Judgement method of one-phase earthing failure in electric distribution network |
| CN1423132A (en) * | 2001-11-28 | 2003-06-11 | 淄博科汇电气有限公司 | Small-current earth fault switch-selecting and sectioning method for power system |
| CN106226651A (en) * | 2016-07-12 | 2016-12-14 | 国电南瑞科技股份有限公司 | A kind of overhead type indicating fault location terminal and voltage-to-ground measuring method |
| CN108693439A (en) * | 2017-04-07 | 2018-10-23 | 南京南瑞继保电气有限公司 | A kind of small current neutral grounding system multi-line is the same as phase single-phase grounding selecting method |
| CN107526005A (en) * | 2017-07-31 | 2017-12-29 | 李景禄 | A kind of Sudden Changing Rate of singlephase earth fault processing unit starts method |
| CN107462805A (en) * | 2017-10-09 | 2017-12-12 | 国网山东省电力公司临沂供电公司 | A kind of short circuit fault of power distribution network protection and localization method |
Non-Patent Citations (2)
| Title |
|---|
| 付艳华: "《变电运行现场操作技术》", 31 December 2004, 中国电力出版社 * |
| 王抒祥 主编: "《电网安全运行》", 30 December 2013, 成都：电子科技大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112152191A (en) * | 2020-09-01 | 2020-12-29 | 国网陕西省电力公司榆林供电公司 | Fault processing method, device and storage medium for distribution line |
| CN112152191B (en) * | 2020-09-01 | 2022-05-31 | 国网陕西省电力公司榆林供电公司 | Fault processing method, device and storage medium for distribution line |
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