CN109085451A - The detection method and device of iron core grounding in transformer, storage medium - Google Patents
The detection method and device of iron core grounding in transformer, storage medium Download PDFInfo
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- CN109085451A CN109085451A CN201811003576.8A CN201811003576A CN109085451A CN 109085451 A CN109085451 A CN 109085451A CN 201811003576 A CN201811003576 A CN 201811003576A CN 109085451 A CN109085451 A CN 109085451A
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- grounding point
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
Abstract
The present invention provides a kind of detection method and device of the iron core grounding in transformer, storage medium, this method comprises: determining that transformer is in electriferous state, wherein include iron core and winding, parasitic capacitance of having connected between iron core and winding in transformer；The electric current for detecting the grounding point of the normal ground line on iron core, obtains the first electric current；The electric current of other positions of the detection in addition to grounding point on iron core；When the electric current of other positions is greater than the first electric current, and the first electric current is greater than predetermined current, determine that other positions are grounded；It determines the grounding point of the other positions of ground connection, calculates the position between grounding point and the grounding point of normal ground line, obtain earthing position；The location point that iron core grounding is determined according to earthing position and parasitic capacitance obtains the first grounding point position.Through the invention, solve the problems, such as can not accurately to determine iron core whether multipoint earthing, achieve the effect that accurately to determine multipoint earthing of iron core.
Description
Technical field
The present invention relates to the communications fields, in particular to the detection method and dress of the iron core grounding in a kind of transformer
It sets, storage medium.
Background technique
In normal operation, the electric field constituted between the winding and lead and fuel tank of electrification is non-uniform electric field, iron to transformer
Core and other metal components are in the electric field:
Since iron core and other metal component present positions are different, have floating potential also different, when the electricity between two o'clock
Potential difference, which reaches, just generates spark discharge when can puncture insulation therebetween, this electric discharge is interrupted, two o'clock current potential phase after electric discharge
Together, but electric discharge stops immediately, then generates potential difference again, then discharge.Result after intermittent discharge decomposes transformer oil, for a long time
Go down, gradually destroys the solid insulation of transformer.Eventually lead to accident, it is clear that do not allow, to avoid above-mentioned feelings
Condition occurs, it is specified that transformer core and larger metal parts should all pass through fuel tank reliable ground.
It can be seen from the above, iron core needs one point earth, but cannot there are two o'clock or multipoint earthing.When iron core or other metals
When component has two o'clock or multipoint earthing, closed circuit just will form between grounding point.Magnetic flux intersecting chain produces in this circuit and iron core
Raw potential difference forms circulation in this circuit, will cause iron core hot-spot, it is also possible to generate discharging fault.The prior art
In there is no the scheme of the detection multipoint earthing of iron core of system, cause not determining whether iron core is multipoint earthing
The problem of.
In view of the above technical problems, it not yet puts forward effective solutions in the related technology.
Summary of the invention
The embodiment of the invention provides a kind of detection method and device of the iron core grounding in transformer, storage medium, with
At least solve the problems, such as can not accurately to determine in the related technology iron core whether multipoint earthing.
According to one embodiment of present invention, a kind of detection method of the iron core grounding in transformer is provided, comprising: really
The fixed transformer be in electriferous state, wherein including iron core and winding in the transformer, the iron core and the winding it
Between connected parasitic capacitance；The electric current for detecting the grounding point of the normal ground line on the iron core, obtains the first electric current；Described
The electric current of other positions of the detection in addition to the grounding point on iron core；When the electric current of the other positions is greater than first electricity
Stream, and when first electric current is greater than predetermined current, determine other positions ground connection；Determine the other positions of ground connection
Grounding point, calculate the position between the grounding point and the grounding point of the normal ground line, obtain earthing position；According to institute
It states earthing position and the parasitic capacitance determines the location point of the iron core grounding, obtain the first grounding point position.
Optionally, after obtaining first grounding point position, the method also includes: using setting in the transformation
The earthing position of iron core described in oil chromatogram analysis system detection in device obtains the second grounding point position；It is connect according to described first
Place position and second grounding point position determine the multipoint earthing of iron core.
Optionally, determining that the iron core multiple spot connects according to first grounding point position and second grounding point position
After ground, the method also includes: the multipoint earthing of the iron core is solved according at least one following manner: being stopped to the iron
The power supply of core；Processing of draining the oil is carried out to the oil chromatogram analysis system.
Optionally, the method also includes carrying out coupling Simulation to the multipoint earthing of iron core and the iron core be calculated
Core interior Temperature Distribution in multipoint earthing；The multipoint earthing of iron core is carried out according to the core interior Temperature Distribution
Troubleshooting.
According to another embodiment of the invention, a kind of detection device of the iron core grounding in transformer is provided, comprising:
First determining module, for determining that the transformer is in electriferous state, wherein in the transformer include iron core and winding,
It has connected between the iron core and the winding parasitic capacitance；First detection module, for detecting normally connecing on the iron core
The electric current of the grounding point of ground wire obtains the first electric current；Second detection module removes the grounding point for detecting on the iron core
Except other positions electric current；Second determining module is greater than first electric current for the electric current when the other positions, and
And first electric current determines the other positions ground connection when being greater than predetermined current；Third determining module, for determining ground connection
The grounding point of the other positions calculates the position between the grounding point and the grounding point of the normal ground line, is connect
Position；4th determining module, for determining the position of the iron core grounding according to the earthing position and the parasitic capacitance
Point obtains the first grounding point position.
Optionally, described device further include: first processing module, for after obtaining first grounding point position,
Using the earthing position of iron core described in the oil chromatogram analysis system detection being arranged in the transformer, the second ground connection point is obtained
It sets；5th determining module determines the iron core multiple spot with according to first grounding point position and second grounding point position
Ground connection.
Optionally, described device further include: Second processing module, for according to first grounding point position and described
After second grounding point position determines the multipoint earthing of iron core, the multiple spot of the iron core is solved according at least one following manner
Ground connection: stop the power supply to the iron core；Processing of draining the oil is carried out to the oil chromatogram analysis system.
Optionally, described device further includes third processing module, for carrying out coupling Simulation to the multipoint earthing of iron core
Core interior Temperature Distribution of the iron core in multipoint earthing is calculated；Fourth processing module, for according to the iron core
Interior temperature distribution carries out troubleshooting to the multipoint earthing of iron core.
According to still another embodiment of the invention, a kind of storage medium is additionally provided, the storage medium includes storage
Program, wherein described program executes method described in any of the above embodiments when running.
According to still another embodiment of the invention, a kind of processor is additionally provided, the processor is used to run program,
In, described program executes method described in any of the above embodiments when running.
Through the invention, due to detect iron core whether multipoint earthing during, it is necessary first to determine that transformer is in
Electriferous state, wherein include iron core and winding, parasitic capacitance of having connected between iron core and winding in transformer；It detects on iron core
Normal ground line grounding point electric current, obtain the first electric current；Other positions of the detection in addition to grounding point on iron core
Electric current；When the electric current of other positions is greater than the first electric current, and the first electric current is greater than predetermined current, determine that other positions connect
Ground；It determines the grounding point of the other positions of ground connection, calculates the position between grounding point and the grounding point of normal ground line, connect
Position；The location point that iron core grounding is determined according to earthing position and parasitic capacitance obtains the first grounding point position.Therefore, may be used
With solution must not accurately determine iron core whether multipoint earthing the problem of, achieve the effect that accurately to determine multipoint earthing of iron core.
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 the hardware knot of the mobile terminal of the detection method of the iron core grounding in a kind of transformer of the embodiment of the present invention
Structure block diagram；
Fig. 2 is the flow chart of the detection method of the iron core grounding in transformer according to an embodiment of the present invention；
Fig. 3 is sectional schematic diagram when transformer core according to an embodiment of the present invention is earth-free；
Fig. 4 is the structural block diagram of the detection device of the iron core grounding in transformer according to an embodiment of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
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.
Embodiment 1
Embodiment of the method provided by the embodiment of the present application one can be in mobile terminal, terminal or similar fortune
It calculates and is executed in device.For running on mobile terminals, Fig. 1 is the iron core grounding in a kind of transformer of the embodiment of the present invention
Detection method mobile terminal hardware block diagram.As shown in Figure 1, mobile terminal 10 may include one or more (Fig. 1
In only show one) (processor 102 can include but is not limited to Micro-processor MCV or programmable logic device to processor 102
The processing unit of FPGA etc.), memory 104 for storing data and the transmitting device 106 for communication function.Ability
Domain those of ordinary skill is appreciated that structure shown in FIG. 1 is only to illustrate, and does not cause to limit to the structure of above-mentioned electronic device
It is fixed.For example, mobile terminal 10 may also include the more perhaps less component than shown in Fig. 1 or have different from shown in Fig. 1
Configuration.
Memory 104 can be used for storing the software program and module of application software, such as the transformation in the embodiment of the present invention
Corresponding program instruction/the module of the detection method of iron core grounding in device, processor 102 are stored in memory 104 by operation
Interior software program and module realizes above-mentioned method thereby executing various function application and data processing.Memory
104 may include high speed random access memory, may also include nonvolatile memory, and such as one or more magnetic storage device dodges
It deposits or other non-volatile solid state memories.In some instances, memory 104 can further comprise relative to processor
102 remotely located memories, these remote memories can pass through network connection to mobile terminal 10.The example of above-mentioned network
Including but not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Transmitting device 106 is used to that data to be received or sent via a network.Above-mentioned network specific example may include
The wireless network that the communication providers of mobile terminal 10 provide.In an example, transmitting device 106 includes a Network adaptation
Device (Network Interface Controller, NIC), can be connected by base station with other network equipments so as to it is mutual
Networking is communicated.In an example, transmitting device 106 can be radio frequency (Radio Frequency, RF) module, use
In wirelessly being communicated with internet.
A kind of detection method of the iron core grounding in transformer is provided in the present embodiment, and Fig. 2 is real according to the present invention
The flow chart of the detection method of the iron core grounding in the transformer of example is applied, as shown in Fig. 2, the process includes the following steps:
Step S202 determines that above-mentioned transformer is in electriferous state, wherein in above-mentioned transformer include iron core and winding,
It has connected between above-mentioned iron core and above-mentioned winding parasitic capacitance；
Step S204 detects the electric current of the grounding point of the normal ground line on above-mentioned iron core, obtains the first electric current；
Step S206, the electric current of other positions of the detection in addition to above-mentioned grounding point on above-mentioned iron core；
Step S208, when the electric current of above-mentioned other positions is greater than above-mentioned first electric current, and above-mentioned first electric current be greater than it is pre-
If when electric current, determining above-mentioned other positions ground connection；
Step S210 determines the grounding point of the above-mentioned other positions of ground connection, calculates above-mentioned grounding point and above-mentioned normal ground
Position between the grounding point of line, obtains earthing position；
Step S212 determines the location point of above-mentioned iron core grounding according to above-mentioned earthing position and above-mentioned parasitic capacitance, obtains
First grounding point position.
Through the above steps, through the invention, due to detect iron core whether multipoint earthing during, it is necessary first to really
Determine transformer and be in electriferous state, wherein includes iron core and winding, parasitic electricity of having connected between iron core and winding in transformer
Hold；The electric current for detecting the grounding point of the normal ground line on iron core, obtains the first electric current；Detection is in addition to grounding point on iron core
Other positions electric current；When the electric current of other positions is greater than the first electric current, and the first electric current is greater than predetermined current, determine
Other positions ground connection；It determines the grounding point of the other positions of ground connection, calculates between grounding point and the grounding point of normal ground line
Position obtains earthing position；The location point that iron core grounding is determined according to earthing position and parasitic capacitance obtains the first ground connection point
It sets.Therefore, can solve can not accurately determine iron core whether multipoint earthing the problem of, reach accurately determine iron core multiple spot connect
The effect on ground.
Optionally, the executing subject of above-mentioned steps can be terminal etc., but not limited to this.
In an alternative embodiment, after obtaining above-mentioned first grounding point position, the above method further include: utilize
The earthing position of the above-mentioned iron core of oil chromatogram analysis system detection in above-mentioned transformer is set, the second grounding point position is obtained；
Above-mentioned multipoint earthing of iron core is determined according to above-mentioned first grounding point position and above-mentioned second grounding point position.
In an alternative embodiment, it is determined according to above-mentioned first grounding point position and above-mentioned second grounding point position
After above-mentioned multipoint earthing of iron core, the above method further include: connect according to the multiple spot that at least one following manner solves above-mentioned iron core
Ground: stop the power supply to above-mentioned iron core；Processing of draining the oil is carried out to above-mentioned oil chromatogram analysis system.
In an alternative embodiment, the above method further includes carrying out coupling Simulation meter to above-mentioned multipoint earthing of iron core
Calculation obtains core interior Temperature Distribution of the above-mentioned iron core in multipoint earthing；According to above-mentioned core interior Temperature Distribution to above-mentioned iron
Core multipoint earthing carries out troubleshooting.
The present invention is described in detail combined with specific embodiments below:
In normal operation, the electric field constituted between the winding and lead and fuel tank of electrification is non-uniform electric field, iron to transformer
Core and other metal components are in the electric field, as shown in Figure 3:
Between high-voltage winding and low pressure winding, between low pressure winding and iron core, iron core and the earth (fuel tank of transformer) it
Between all there is parasitic capacitance, charging winding will make iron core generate certain current potential over the ground by the coupling of parasitic capacitance,
Commonly referred to as floating potential has floating potential also different, works as two o'clock since iron core and other metal component present positions are different
Between potential difference reach and just generate spark discharge when can puncture insulation therebetween, this electric discharge be it is interrupted, two after electric discharge
Point current potential is identical, but electric discharge stops immediately, then generates potential difference again, then discharge.Result after intermittent discharge makes transformer oil
It decomposes, goes down for a long time, gradually destroy the solid insulation of transformer.Eventually lead to accident, it is clear that do not allow, to keep away
Exempt from above situation to occur, it is specified that transformer core and larger metal parts should all be by fuel tank reliable grounds.
It can be seen from the above, iron core needs one point earth, but cannot there are two o'clock or multipoint earthing.When iron core or other metals
When component has two o'clock or multipoint earthing, closed circuit just will form between grounding point.Magnetic flux intersecting chain produces in this circuit and iron core
Raw potential difference forms circulation in this circuit, will cause iron core hot-spot, it is also possible to generate discharging fault.
Common fault type has following several:
(1) iron core touches shell, touches folder；
(2) punching bolting steel cover for seat is too long is shorted with silicon steel sheet；
(3) there is metallic foreign body in fuel tank, make silicon steel sheet partial short-circuit；
(4) core insulation dampness or damage, bottom deposit greasy filth and moisture, and insulation resistance decline, clamp insulation, parallels are exhausted
Edge, can insulation (paper mold or wooden unit) dampness or damage etc., lead to iron core high resistant multipoint earthing.
Iron core grounding failure cause mainly has:
(1) ground strip because construction technology and design it is bad caused by short circuit；
(2) multipoint earthing due to caused by attachment and extraneous factor.
Specific fault detection method is described below:
Oil chromatography analysis:
Oil chromatography live detection technology is the differentiation and development of gas chromatographic analysis technique, can be real in electric substation's master control room
Now to the monitoring of transformer, monitoring cycle can be set according to actual needs.Its monitoring process is as follows: 1. Oil-gas Separations；2. logical
Cross adsorbent sieve pore suction-operated or fixer and carrier gas two-phase partitioning effect complete component separation；3. utilizing computer data
Collection system is stored, quantitative analysis is done to various characteristic gas.
It is the effective ways for finding transformer core grounding failure using gas chromatography.Iron core grounding event occurs
The transformer of barrier, oil chromatogram analysis data usually have following characteristics: total hydrocarbon content is more than defined demand value 150L/L, and second
Alkene, methane account for larger specific gravity.Acetylene content is low or does not occur, i.e., not up to defined demand value 5L/L.If there is acetylene also to surpass
Demand value is crossed, then may be dynamic earth fault failure.If there is gas component content more than demand value and gas gas production rate being more than
When the case where demand value, three ratio calculations are done.Calculated result is 022 (021), then is judged as the thermal fault higher than 700 DEG C, may
Be as caused by multipoint earthing of iron core, need to carry out iron core grounding current measurement or offline insulation measurement come into
One step confirms failure cause.
Earth current measurement:
The Electric Method of iron core fault detection is the curent change on detection iron core grounding line to reflect iron core operation conditions.Become
In depressor operational process, can draw outside transformer core on ground line plus clamp on amperemeter, come measure on iron core grounding line whether
There is electric current.The standard of judgement is:
A. when transformer operates normally, because no current circuit is formed, so the electric current very little on ground line, is milliampere grade,
It is usually no more than 0.1 peace；
B. it when measurement current value reaches ampere grade, should arouse attention；
C. when there are multipoint earth faults, the circulation flowed through is decided by the relative position of fault point Yu normal ground point,
Surrounded in i.e. short-circuit circle magnetic flux number, it is general up to more than ten amperes.
In short, main method of the insulation measurement as off-line testing is gathered around simultaneously by a large amount of field practice experience
There are national standard and professional standard to coach.Its characteristic of experiment is periodical power failure, site examining and repairing, and there is also person's mistakes for method itself
The problems such as degree is overhauled, is handled not in time catastrophic failure.
Gas chromatographic analysis has applied more than 40 years in China, successfully prevents many transformer faults, technically
It is very mature, it is also largely effective for the judgement of iron core grounding failure.But if iron core grounding failure is not serious, generation
Analyze need gas flow it is inadequate, then can not chromatograph method detection be out of order come.Therefore, for transformer real-time monitoring
For, often there is hysteresis quality in gas chromatographic analysis.And it is worth noting that, when the silicon steel sheet that transformer core occurs is locally short
Lu Shi is merely able to be detected using the method for oil chromatogram analysis, other two methods, which cannot detect, to be out of order.
Electric Method is largely effective on detection transformer fault, because transformer is setting for an electromagnetic principle job first
It is standby, it is reflected in first after transformer core failure in the variation of electrical quantity.Therefore this method be also in various methods most rapidly, most
Directly, most sensitive mode.But since transformer field has very strong electromagnetic interference, this is caused to the application of Electric Method
Very big influence.
The temperature rise of core interior is analyzed as follows:
The iron core surface temperature rise that usually control is contacted with transformer oil in design of transformer is no more than 75K, considers oil
Allowing temperature rise is 55K, so iron core surface should be (75-55) K=20K to the temperature rise of oil.
It is heat by along lamination direction and vertical lamination direction in shedding for the heat that iron core internal loss generates
Conduction；It is that heat is shed by the convection current of oil on the surface of iron core.
Axial oil duct in oil-immersed transformer between core limb and oily contact core limb and interior winding, the upper surface of iron yoke
It is directly contacted with oil, though the concurrent condition of side is good, by the covering of clamp insulation, radiating surface is reduced.Therefore iron core surface
Temperature is different.
Temperature rise calculating inside iron core is more complicated work, because are as follows:
What 1. the loss in iron core was unevenly distributed, it is big in seam crossing loss, especially in the T shape seam crossing of center pillar.
2. the heating conduction of core material is non-uniform, because having insulating film, cold-reduced silicon sheet on the surface of silicon steel sheet
Thermal conductivity in silicon steel plate plane is λ1=21W/ (m2DEG C), and the thermal conductivity of vertical silicon steel sheet is λ2=3.3W/ (m2·
℃)。
3. there are three direction, i.e., the both direction of vertical core limb plane and the directions along height for the heat dissipation of iron core.Heat dissipation
Complex boundary, the oil temperature along iron core height are variations, and iron core surface and oily contact conditions are also different, therefore, the heat dissipation of iron core
It will be three-dimensional problem.
Iron core surface to the heat dissipation of oil is carried out by convection current, and the rule of heat loss through convection can be used.
In conclusion the scheme real-time of on-line checking multipoint earthing of iron core compensates for the hysteresis quality of oil chromatogram analysis；Therefore
When barrier detection, the wide feature of oil chromatogram analysis method detection range can make up the deficiency of checking for grounded current narrow range again.Institute
To be directed to transformer core multipoint earth faults, Oil chromatography analysis and earth current mensuration can be with combined applications, to reach
Discovery failure in time, the purpose of effective guided maintenance.
Multiple physical field coupling Simulation has been carried out to iron core multipoint earth faults based on FInite Element to calculate, and obtains following knot
By:
A. iron core interior temperature distribution, centered on iron core surface earthing fault point, from high to low to iron core internal stretch.
Because being less than along on silicon steel sheet direction, at a temperature of core limb direction perpendicular to thermal conductivity on silicon steel sheet direction
Drop is faster.
B. earth current is first flowed along silicon steel sheet in earth fault, is then flowed again across silicon steel sheet, by several
It after silicon steel sheet, is flowed across silicon steel sheet to current parallel, finally converges to ground strip outflow.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing
The part that technology contributes can be embodied in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server or network equipment etc.) execute method described in each embodiment of the present invention.
Embodiment 2
A kind of detection device of the iron core grounding in transformer is additionally provided in the present embodiment, and the device is for realizing upper
Embodiment and preferred embodiment are stated, the descriptions that have already been made will not be repeated.As used below, term " module " can be with
Realize the combination of the software and/or hardware of predetermined function.Although device described in following embodiment is preferably come with software real
It is existing, but the realization of the combination of hardware or software and hardware is also that may and be contemplated.
Fig. 4 is the structural block diagram of the detection device of the iron core grounding in transformer according to an embodiment of the present invention, such as Fig. 4 institute
Show, which includes: the first determining module 402, first detection module 404, the second detection module 406, the second determining module
408, third determining module 410 and the 4th determining module 412, are below described in detail the device:
First determining module 402, for determining that above-mentioned transformer is in electriferous state, wherein include in above-mentioned transformer
Iron core and winding, parasitic capacitance of having connected between above-mentioned iron core and above-mentioned winding；First detection module 404, is connected among the above
The first determining module 402, the electric current of the grounding point for detecting the normal ground line on above-mentioned iron core obtains the first electric current；
Second detection module 506 is connected to first detection module 404 among the above, removes above-mentioned ground connection for detecting on above-mentioned iron core
The electric current of other positions except point；Second determining module 408 is connected to the second detection module 406 among the above, for working as
State other positions electric current be greater than above-mentioned first electric current, and above-mentioned first electric current be greater than predetermined current when, determine it is above-mentioned other
Position ground connection；Third determining module 410 is connected to the second determining module 408 among the above, for determine ground connection it is above-mentioned other
The grounding point of position calculates the position between above-mentioned grounding point and the grounding point of above-mentioned normal ground line, obtains earthing position；The
Four determining modules 412 are connected to third determining module 410 among the above, for according to above-mentioned earthing position and above-mentioned parasitic electricity
Hold the location point for determining above-mentioned iron core grounding, obtains the first grounding point position.
In an alternative embodiment, above-mentioned apparatus further include: first processing module, for connecing obtaining above-mentioned first
After place position, using the earthing position for the above-mentioned iron core of oil chromatogram analysis system detection being arranged in above-mentioned transformer, obtain
To the second grounding point position；5th determining module, with true according to above-mentioned first grounding point position and above-mentioned second grounding point position
Fixed above-mentioned multipoint earthing of iron core.
In an alternative embodiment, above-mentioned apparatus further include: Second processing module, for being connect according to above-mentioned first
After place position and above-mentioned second grounding point position determine above-mentioned multipoint earthing of iron core, solved according at least one following manner
The multipoint earthing of above-mentioned iron core: stop the power supply to above-mentioned iron core；Processing of draining the oil is carried out to above-mentioned oil chromatogram analysis system.
In an alternative embodiment, above-mentioned apparatus further includes third processing module, for connecing to above-mentioned iron core multiple spot
Ground carries out coupling Simulation and core interior Temperature Distribution of the above-mentioned iron core in multipoint earthing is calculated；Fourth processing module is used
According to above-mentioned core interior Temperature Distribution to above-mentioned multipoint earthing of iron core carry out troubleshooting.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong
Following manner realization is crossed, but not limited to this: above-mentioned module is respectively positioned in same processor；Alternatively, above-mentioned modules are with any
Combined form is located in different processors.
The embodiments of the present invention also provide a kind of storage medium, which includes the program of storage, wherein above-mentioned
Any of the above-described above-mentioned method is executed when program is run.
Optionally, in the present embodiment, above-mentioned storage medium can be set to store for executing above each step
Program code.
Optionally, in the present embodiment, above-mentioned storage medium can include but is not limited to: USB flash disk, read-only memory (Read-
Only Memory, referred to as ROM), it is random access memory (Random Access Memory, referred to as RAM), mobile hard
The various media that can store program code such as disk, magnetic or disk.
The embodiments of the present invention also provide a kind of processor, the processor is for running program, wherein program operation
Step in Shi Zhihang any of the above-described method.
Optionally, the specific example in the present embodiment can be with reference to described in above-described embodiment and optional embodiment
Example, details are not described herein for the present embodiment.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.It is all within principle of the invention, it is made it is any modification, etc.
With replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of detection method of the iron core grounding in transformer, which is characterized in that
Determine that the transformer is in electriferous state, wherein include iron core and winding, the iron core and described in the transformer
It has connected between winding parasitic capacitance；
The electric current for detecting the grounding point of the normal ground line on the iron core, obtains the first electric current；
The electric current of other positions of the detection in addition to the grounding point on the iron core；
When the electric current of the other positions is greater than first electric current, and first electric current is greater than predetermined current, determine
The other positions ground connection；
The grounding point for determining the other positions of ground connection, calculates between the grounding point and the grounding point of the normal ground line
Position, obtain earthing position；
The location point that the iron core grounding is determined according to the earthing position and the parasitic capacitance obtains the first ground connection point
It sets.
2. the method according to claim 1, wherein after obtaining first grounding point position, the side
Method further include:
Using the earthing position of iron core described in the oil chromatogram analysis system detection being arranged in the transformer, the second ground connection is obtained
Point position；
The multipoint earthing of iron core is determined according to first grounding point position and second grounding point position.
3. according to the method described in claim 2, it is characterized in that, being connect according to first grounding point position and described second
After place position determines the multipoint earthing of iron core, the method also includes:
The multipoint earthing of the iron core is solved according at least one following manner:
Stop the power supply to the iron core；
Processing of draining the oil is carried out to the oil chromatogram analysis system.
4. the method according to claim 1, wherein the method also includes,
Coupling Simulation is carried out to the multipoint earthing of iron core, core interior temperature of the iron core in multipoint earthing is calculated
Distribution；
Troubleshooting is carried out to the multipoint earthing of iron core according to the core interior Temperature Distribution.
5. a kind of detection device of the iron core grounding in transformer characterized by comprising
First determining module, for determining that the transformer is in electriferous state, wherein in the transformer include iron core and around
Group, parasitic capacitance of having connected between the iron core and the winding；
First detection module, the electric current of the grounding point for detecting the normal ground line on the iron core, obtains the first electric current；
Second detection module, the electric current for other positions of the detection in addition to the grounding point on the iron core；
Second determining module is greater than first electric current for the electric current when the other positions, and first electric current is big
When predetermined current, the other positions ground connection is determined；
Third determining module, the grounding point of the other positions for determining ground connection calculate the grounding point and described normal
Position between the grounding point of ground line, obtains earthing position；
4th determining module, for determining the location point of the iron core grounding according to the earthing position and the parasitic capacitance,
Obtain the first grounding point position.
6. device according to claim 5, which is characterized in that described device further include:
First processing module, for utilizing the oil being arranged in the transformer after obtaining first grounding point position
Chromatographic analysis system detects the earthing position of the iron core, obtains the second grounding point position；
5th determining module determines the iron core multiple spot with according to first grounding point position and second grounding point position
Ground connection.
7. device according to claim 6, which is characterized in that described device further include:
Second processing module, for determining the iron core according to first grounding point position and second grounding point position
After multipoint earthing, the multipoint earthing of the iron core is solved according at least one following manner:
Stop the power supply to the iron core；
Processing of draining the oil is carried out to the oil chromatogram analysis system.
8. device according to claim 5, which is characterized in that described device further includes,
The iron core is calculated in multipoint earthing for carrying out coupling Simulation to the multipoint earthing of iron core in third processing module
When core interior Temperature Distribution；
Fourth processing module, for carrying out troubleshooting to the multipoint earthing of iron core according to the core interior Temperature Distribution.
9. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein when described program is run
Method described in any one of perform claim requirement 1 to 4.
10. 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 4 described in method.
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| CN201811003576.8A CN109085451B (en) | 2018-08-30 | 2018-08-30 | Method and device for detecting iron core grounding in transformer and storage medium |
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