CN108051234A - Fan fault detection method and device, converter and computer readable storage medium - Google Patents
Fan fault detection method and device, converter and computer readable storage medium Download PDFInfo
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Abstract
The invention provides a fan fault detection method, a fan fault detection device, a current transformer and a computer readable storage medium, wherein the method comprises the following steps: acquiring a temperature value of a current transformer within a preset range of a designated power cabinet; acquiring a deviation value of a temperature value in a preset range of the specified power cabinet relative to a first preset temperature threshold value; and detecting whether the fan of the designated power cabinet has a fault according to the deviation value. The invention realizes the detection of the fan fault, thereby prolonging the service life of the converter.
Description
Technical field
The present invention relates to fan control fields, and in particular to a kind of fan failure detection method, device, current transformer and meter
Calculation machine readable storage medium storing program for executing.
Background technology
For the grid-connected converter of wind-driven generator since power grade is higher, caloric value is big, so heat dissipation problem is big always
Family is of interest.Existing heat exchange means have：Natural air heat loss through convection, air blast cooling, water cooling etc..It radiates in air blast cooling
In, fan is one of most important component, and working condition directly affects the runnability of equipment.Since fan is in air passage
In, environment rather harsh, and in mechanical rotation status, fan be possible to after much time using aged deterioration or
Person is also possible in use because of external force and stall.If after breaking down and being unable to operate normally in fan, become
Stream device continues to work, then the mistake cause thermal damage of current transformer is likely to cause, so as to cause larger loss, thus fan
Fault detect is particularly important.
The content of the invention
In view of this, an embodiment of the present invention provides a kind of fan failure detection method, device, current transformer and computers
Readable storage medium storing program for executing, to realize the detection to fan failure.
For this purpose, an embodiment of the present invention provides following technical solutions：
First aspect present invention, provides a kind of fan failure detection method, and this method includes：Obtain the finger of current transformer
Determine the temperature value in power cabinet preset range；The temperature value obtained in the specified power cabinet preset range is pre- compared with first
Determine the deviation value of temperature threshold；The fan that the specified power cabinet is detected according to the deviation value whether there is failure.
It is achieved thereby that the temperature value assessment in power cabinet preset range by analyzing current transformer is corresponding with the power cabinet
Fan operating status.
Optionally, the temperature value in the specified power cabinet preset range is obtained compared with the first predetermined temperature threshold
Before deviation value, further include：Obtain multiple temperature values in multiple power cabinet preset ranges of the current transformer；Described in calculating
The average value of multiple temperature values, using the average value as first predetermined temperature threshold.
Due to current transformer multiple power cabinets average temperature value relatively each power cabinet fan operation shape
Temperature value when state is normal, therefore using the average value as criterion, it is estimated that just whether fan operating status
Often.
Optionally, the multiple temperature values obtained in multiple power cabinet preset ranges of the current transformer include：Described in acquisition
Multiple initial temperature values in multiple power cabinet preset ranges of current transformer；Low pass filtered is carried out to the multiple initial temperature value
Ripple handles to obtain the multiple temperature value.
Since temperature data may be subject to electromagnetic interference saltus step occur, by the alternative embodiment to temperature data
Carry out low-pass filtering treatment.
Optionally, obtaining the multiple temperature value to the multiple initial temperature value progress low-pass filtering treatment includes：It is logical
It crosses equation below and obtains the multiple temperature value：Ti_f (k)=k1*Ti (k)+k2*Ti_f (k-1)；K1=Ts/ (Ts+Tf),
K2=1-K1；Wherein, Ti_f (k) is the temperature value in i-th of power cabinet preset range of current transformer described in current period；Ti
(k) it is the initial temperature value in i-th of power cabinet preset range of current transformer described in current period；Ti_f (k-1) is upper one
Temperature value in i-th of power cabinet preset range of current transformer described in the cycle；Ts is the sampling period；Tf is filtering time length.
The temperature data of removal electromagnetic interference can be obtained by the specific one order inertia filtering algorithm.
Optionally, the temperature value in the specified power cabinet preset range is obtained compared with the first predetermined temperature threshold
Deviation value includes：The difference of the temperature value and first predetermined temperature threshold in the specified power cabinet preset range is calculated,
Using the ratio of the difference and first predetermined temperature threshold as the deviation value.
In embodiment arranged side by side corresponding with the alternative embodiment, this can also be specified to the temperature in power cabinet preset range
The difference deviation value the most described of angle value and first predetermined temperature threshold.
Optionally, the fan of the specified power cabinet is detected according to the deviation value to be included with the presence or absence of failure：By described in
Deviation value is compared with the second predetermined temperature threshold：When the deviation value is more than second predetermined temperature threshold, determine described
There are failures for the fan of specified power cabinet.
It can accurately reflect the operating status of fan by deviation value.
Optionally, the temperature value obtained in the specified power cabinet preset range of current transformer includes：Obtain the specified power
The return air inlet of cabinet or the temperature value of air outlet.
The return air inlet of specified power cabinet or the temperature of air outlet are higher, are more advantageous to the judgement of fan failure.
Second aspect of the present invention provides a kind of fan fault detection device, including：First acquisition module, for obtaining
Temperature value in the specified power cabinet preset range of current transformer；Second acquisition module makes a reservation for for obtaining the specified power cabinet
In the range of temperature value compared with the first predetermined temperature threshold deviation value；Detection module, for being detected according to the deviation value
The fan of the specified power cabinet whether there is failure.
It is achieved thereby that the temperature value assessment in power cabinet preset range by analyzing current transformer is corresponding with the power cabinet
Fan operating status.
Optionally, described device further includes：3rd acquisition module, for obtaining the finger in second acquisition module
Before determining deviation value of the temperature value compared with the first predetermined temperature threshold in power cabinet preset range, the current transformer is obtained
Multiple power cabinet preset ranges in multiple temperature values；Computing module, for calculating the average value of the multiple temperature value,
Using the average value as first predetermined temperature threshold.
Due to current transformer multiple power cabinets average temperature value relatively each power cabinet fan operation shape
Temperature value when state is normal, therefore using the average value as criterion, it is estimated that just whether fan operating status
Often.
Optionally, the 3rd acquisition module includes：Acquiring unit, for obtaining multiple power cabinets of the current transformer
Multiple initial temperature values in preset range；Processing unit, for carrying out low-pass filtering treatment to the multiple initial temperature value
Obtain the multiple temperature value.
Since temperature data may be subject to electromagnetic interference saltus step occur, by the alternative embodiment to temperature data
Carry out low-pass filtering treatment.
Optionally, the processing unit is additionally operable to obtain the multiple temperature value by equation below：Ti_f (k)=k1*
Ti(k)+k2*Ti_f(k-1)；K1=Ts/ (Ts+Tf), K2=1-K1；Wherein, Ti_f (k) is current transformer described in current period
I-th of power cabinet preset range in temperature value；Ti (k) is the predetermined model of i-th of power cabinet of current transformer described in current period
Enclose interior initial temperature value；Ti_f (k-1) was the temperature in i-th of power cabinet preset range of current transformer described in a upper cycle
Value；Ts is the sampling period；Tf is filtering time length.
The temperature data of removal electromagnetic interference can be obtained by the specific one order inertia filtering algorithm.
Optionally, second acquisition module be additionally operable to calculate temperature value in the specified power cabinet preset range with
The difference of first predetermined temperature threshold, using the ratio of the difference and first predetermined temperature threshold as described inclined
From value.
In embodiment arranged side by side corresponding with the alternative embodiment, this can also be specified to the temperature in power cabinet preset range
The difference deviation value the most described of angle value and first predetermined temperature threshold.
Optionally, the detection module includes：Comparing unit, for by the deviation value and the second predetermined temperature threshold
Compare：Determination unit, for when the deviation value is more than second predetermined temperature threshold, determining the specified power cabinet
Fan there are failures.
It can accurately reflect the operating status of fan by deviation value.
Optionally, first acquisition module is additionally operable to obtain the return air inlet or air outlet of the specified power cabinet
Temperature value.
The return air inlet of specified power cabinet or the temperature of air outlet are higher, are more advantageous to the judgement of fan failure.
Third aspect present invention provides a kind of current transformer, including：Temperature sensor, memory and processor, it is described
Connection is communicated between temperature sensor, the memory and the processor, the temperature sensor is used to gather unsteady flow
Multiple temperature values in multiple power cabinet preset ranges of device, and the multiple temperature value is sent to the processor, it is described
Computer instruction is stored in memory, the processor is by performing the computer instruction, so as to perform above-mentioned first party
Any fan failure detection method in face.
Fourth aspect present invention provides a kind of computer readable storage medium, which is characterized in that the computer can
It reads storage medium and is stored with computer instruction, the computer instruction is used to that the computer to be made to perform in above-mentioned first aspect
Any fan failure detection method.
Technical solution of the embodiment of the present invention, has the following advantages that：
An embodiment of the present invention provides a kind of fan failure detection method, device, current transformer and computer-readable storage mediums
Matter, wherein, this method includes：Obtain the temperature value in the specified power cabinet preset range of current transformer；Obtain the specified power
Temperature value in cabinet preset range compared with the first predetermined temperature threshold deviation value；The finger is detected according to the deviation value
The fan of power cabinet is determined with the presence or absence of failure, is realized the detection to fan failure, and then is extended the use longevity of current transformer
Life.
Description of the drawings
It, below will be to tool in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Body embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing be some embodiments of the present invention, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the flow chart of fan failure detection method according to embodiments of the present invention；
Fig. 2 is converter structure schematic diagram according to embodiments of the present invention；
Fig. 3 is the structure diagram of fan fault detection device according to embodiments of the present invention；
Fig. 4 is the hardware architecture diagram of current transformer provided in an embodiment of the present invention；
Fig. 5 is the hardware architecture diagram of current transformer according to embodiments of the present invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
All other embodiments obtained under the premise of creative work are not made, belong to the scope of protection of the invention.
General wind electric converter is made of power cabinet 1,2 power cabinet n of power cabinet, and each power cabinet is generally set
Aerofoil fan, air passage, empty water- to-water heat exchanger, power heat generating component etc..A kind of fan failure detection side is provided in the present embodiment
Method, available for above-mentioned wind electric converter, Fig. 1 is the flow chart of fan failure detection method according to embodiments of the present invention, is such as schemed
Shown in 1, which includes the following steps：
Step S101 obtains the temperature value in the specified power cabinet preset range of current transformer.Due to power cabinet return air inlet or
The temperature of person's air outlet is higher, therefore in one alternate embodiment, using the temperature of power cabinet return air inlet or air outlet as
The whether normal foundation of fan operating status can more accurately reflect the operating status of fan.
Step S102 is obtained and is specified the temperature value in power cabinet preset range compared with the inclined of the first predetermined temperature threshold
From value.Due to current transformer multiple power cabinets average temperature value relatively each power cabinet fan operating status
Temperature value when normal, therefore in one alternate embodiment, obtain more in multiple power cabinet preset ranges of current transformer
A temperature value calculates the average value of the plurality of temperature value, i.e.That is μ represents the flat of the plurality of temperature value
Average, n represent the quantity of temperature data.Using the average value as first predetermined temperature threshold.Using the average value as judgement
Standard, it is estimated that whether fan operating status is normal.
It on above-mentioned deviation value, can obtain in several ways, in one alternate embodiment, calculate this and specify work(
The difference of temperature value and the first predetermined temperature threshold in rate cabinet preset range, by the difference and the first predetermined temperature threshold
Ratio is as above-mentioned deviation value, i.e.,σiRepresent the deviation value；In another alternative embodiment,
This can be specified to the difference deviation the most above-mentioned of the temperature value and first predetermined temperature threshold in power cabinet preset range
Value, i.e. σi=Ti_f(k)-μ。
Step S103 detects the fan for specifying power cabinet according to the deviation value and whether there is failure.
Specifically, by the deviation value compared with the second predetermined temperature threshold, it is more than second predetermined temperature in the deviation value
During threshold value, determine that the fan of specified power cabinet there are failure, is less than or equal to the second predetermined temperature threshold in the deviation value
When, determine that this specifies the fan of power cabinet not have failure.Wherein, second predetermined temperature threshold can be by test method,
Test the limiting value σ of σ during circulating fan normal condition in power cabinetmax.In another alternative embodiment, it can also judge
Whether the deviation value belongs to predetermined interval, which can be by test method, test the circulated air in power cabinet
When fanning normal condition, default section when belonging to the predetermined interval, determines that this specifies the fan of power cabinet not have failure,
When being not belonging to the predetermined interval, determine this specify power cabinet fan there are failures.In another alternative embodiment, work as change
In the case that the quantity of the power cabinet of stream device is less than two, the two power cabinet temperature gaps are calculated, are preset when this difference is more than
During threshold value, it is believed that the fan failure of the high power body of temperature.Those skilled in the art describe according to this embodiment, can adopt
It is realized with other modes in the prior art.
The temperature value of current transformer can generally reflect the operating status of fan, by above-mentioned steps, by the power of current transformer
Temperature around cabinet compared with the first predetermined temperature threshold deviation value as the fan operating status for judging the power cabinet according to
According to realizing the detection to fan failure, and then extend the service life of current transformer.
Since temperature data may be subject to electromagnetic interference saltus step occur, in one alternate embodiment, unsteady flow is obtained
Multiple initial temperature values in multiple power cabinet preset ranges of device carry out low-pass filtering treatment to the plurality of initial temperature value
Obtain above-mentioned multiple temperature values.Specifically, the plurality of temperature value is obtained by equation below：Ti_f (k)=k1*Ti (k)+k2*
Ti_f(k-1)；K1=Ts/ (Ts+Tf), K2=1-K1；Wherein, Ti_f (k) is i-th of power of the current period current transformer
Temperature value in cabinet preset range；Ti (k) is the initial temperature in i-th of power cabinet preset range of the current period current transformer
Angle value；Ti_f (k-1) was the temperature value in i-th of power cabinet preset range of the current transformer of the upper cycle；Ts is sampling week
Phase；Tf is filtering time length, for example, Tf is arranged to 50 times of Ts, such as Ts=20ms, then needs Tf=1s.It can by this
Select embodiment that can obtain the temperature data of removal electromagnetic interference using one order inertia filtering algorithm.
The temperature of power cabinet return air inlet or air outlet can be collected by temperature sensor, as shown in Fig. 2, wind-powered electricity generation
Current transformer is made of power cabinet 1,2 power cabinet n of power cabinet, and each power cabinet generally sets aerofoil fan, air passage, sky
Temperature sensor is arranged at the return air of the aerofoil fan of each power cabinet by water- to-water heat exchanger, power module, temperature sensor etc.
Mouthful, you can collect the temperature around each power cabinet.
Additionally provide a kind of fan fault detection device in the present embodiment, the device be used to implement above-described embodiment and
Preferred embodiment had carried out repeating no more for explanation.As used below, term " module " can be realized predetermined
The combination of the software and/or hardware of function.Although following embodiment described device is preferably realized with software,
The realization of the combination of hardware or software and hardware is also what may and be contemplated.
Fig. 3 is the structure diagram of fan fault detection device according to embodiments of the present invention, as shown in figure 3, the device bag
It includes：First acquisition module 31, for obtaining the temperature value in the specified power cabinet preset range of current transformer；Second acquisition module
32, for obtaining the deviation value for specifying the temperature value in power cabinet preset range compared with the first predetermined temperature threshold；Detection
Module 33 whether there is failure for detecting the fan for specifying power cabinet according to the deviation value.
It is achieved thereby that the temperature value assessment in power cabinet preset range by analyzing current transformer is corresponding with the power cabinet
Fan operating status.
Fig. 4 is another structure diagram of fan fault detection device according to embodiments of the present invention, as shown in figure 4, should
Device further includes：3rd acquisition module 41, for obtaining the temperature in the specified power cabinet preset range in second acquisition module
Before deviation value of the angle value compared with the first predetermined temperature threshold, obtain in multiple power cabinet preset ranges of the current transformer
Multiple temperature values；Computing module 42 for calculating the average value of the plurality of temperature value, first makes a reservation for using the average value as this
Temperature threshold.
Due to current transformer multiple power cabinets average temperature value relatively each power cabinet fan operation shape
Temperature value when state is normal, therefore using the average value as criterion, it is estimated that just whether fan operating status
Often.
Optionally, the 3rd acquisition module 41 includes：Acquiring unit 411, for obtaining multiple power cabinets of the current transformer
Multiple initial temperature values in preset range；Processing unit 412, for being carried out to the plurality of initial temperature value at low-pass filtering
Reason obtains the plurality of temperature value.
Since temperature data may be subject to electromagnetic interference saltus step occur, by the alternative embodiment to temperature data
Carry out low-pass filtering treatment.
Optionally, which is additionally operable to obtain the plurality of temperature value by equation below：Ti_f (k)=k1*Ti
(k)+k2*Ti_f(k-1)；K1=Ts/ (Ts+Tf), K2=1-K1；Wherein, Ti_f (k) is the i-th of the current period current transformer
Temperature value in a power cabinet preset range；Ti (k) is in i-th of power cabinet preset range of the current period current transformer
Initial temperature value；Ti_f (k-1) was the temperature value in i-th of power cabinet preset range of the current transformer of the upper cycle；Ts is to adopt
The sample cycle；Tf is filtering time length.
The temperature data of removal electromagnetic interference can be obtained by the specific one order inertia filtering algorithm.
Optionally, second acquisition module be additionally operable to calculate this specify temperature value in power cabinet preset range with this
The difference of one predetermined temperature threshold, using the ratio of the difference and first predetermined temperature threshold as the deviation value.
In embodiment arranged side by side corresponding with the alternative embodiment, this can also be specified to the temperature in power cabinet preset range
Difference deviation value the most of angle value and first predetermined temperature threshold.
Optionally, which includes：Comparing unit, for by the deviation value compared with the second predetermined temperature threshold：
Determination unit, for when the deviation value is more than second predetermined temperature threshold, determining that this specifies the fan of power cabinet to there is event
Barrier.It can accurately reflect the operating status of fan by deviation value.
Optionally, which is additionally operable to obtain the temperature of the return air inlet for specifying power cabinet or air outlet
Value.The return air inlet of specified power cabinet or the temperature of air outlet are higher, are more advantageous to the judgement of fan failure.
Fan fault detection device in the present embodiment is presented in the form of functional unit, and unit here refers to
ASIC circuit, perform one or more softwares or fixed routine processor and memory and/or other can provide it is above-mentioned
The device of function.
The further function description of above-mentioned modules is identical with above-mentioned corresponding embodiment, and details are not described herein.
Referring to Fig. 5, the current transformer can include：At least one processor 501, such as CPU (Central
Processing Unit, central processing unit), at least one communication interface 503, memory 504, at least one communication bus
502.Wherein, communication bus 502 is used to implement the connection communication between these components.Wherein, communication interface 503 can include
Display screen (Display), keyboard (Keyboard), optional communication interface 503 can also include the wireline interface, wireless of standard
Interface.Memory 504 can be high-speed RAM memory (Random Access Memory, effumability random access memory
Device) or non-labile memory (non-volatile memory), for example, at least a magnetic disk storage.It deposits
Reservoir 504 optionally can also be at least one storage device for being located remotely from aforementioned processor 501.Wherein processor 501 can
To combine the described devices of Fig. 3 or Fig. 4, batch processing code is stored in memory 504, and processor 501 calls storage
The program code stored in device 504 for performing a kind of fan failure detection method, that is, is used to perform following operation：
Obtain the temperature value in the specified power cabinet preset range of current transformer；
Obtain deviation value of the temperature value in the specified power cabinet preset range compared with the first predetermined temperature threshold；
The fan that the specified power cabinet is detected according to the deviation value whether there is failure.
In the embodiment of the present invention, processor 501 calls the program code in memory 504, is additionally operable to perform following behaviour
Make：
Obtain multiple temperature values in multiple power cabinet preset ranges of the current transformer；
The average value of the multiple temperature value is calculated, using the average value as first predetermined temperature threshold.
In the embodiment of the present invention, processor 501 calls the program code in memory 504, is additionally operable to perform following behaviour
Make：
Obtain multiple initial temperature values in multiple power cabinet preset ranges of the current transformer；
Low-pass filtering treatment is carried out to the multiple initial temperature value and obtains the multiple temperature value.
In the embodiment of the present invention, processor 501 calls the program code in memory 504, is additionally operable to perform following behaviour
Make：
The multiple temperature value is obtained by equation below：
Ti_f (k)=k1*Ti (k)+k2*Ti_f (k-1)；K1=Ts/ (Ts+Tf), K2=1-K1；
Wherein, Ti_f (k) is the temperature value in i-th of power cabinet preset range of current transformer described in current period；Ti
(k) it is the initial temperature value in i-th of power cabinet preset range of current transformer described in current period；Ti_f (k-1) is upper one week
Temperature value in i-th of power cabinet preset range of current transformer described in the phase；Ts is the sampling period；Tf is filtering time length.
In the embodiment of the present invention, processor 501 calls the application program in memory 504, can also carry out following behaviour
Make：
Calculate and specify the temperature value in power cabinet preset range and the difference of the first predetermined temperature threshold, by the difference and
The ratio of first predetermined temperature threshold is as the deviation value.
In the embodiment of the present invention, processor 501 calls the program code in memory 504, can also carry out following behaviour
Make：
By the deviation value compared with the second predetermined temperature threshold：
When the deviation value is more than second predetermined temperature threshold, there are failures for the fan of definite specified power cabinet.
In the embodiment of the present invention, processor 501 calls the program code in memory 504, can also carry out following behaviour
Make：
Obtain the temperature value of the return air inlet or air outlet of specifying power cabinet.
Wherein, communication bus 502 can be Peripheral Component Interconnect standard (peripheral component
Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (extended industry standard
Architecture, abbreviation EISA) bus etc..Communication bus 502 can be divided into address bus, data/address bus, controlling bus
Deng.For ease of representing, only represented in Fig. 5 with a thick line, it is not intended that an only bus or a type of bus.
Wherein, memory 504 can include volatile memory (English：Volatile memory), such as deposit at random
Access to memory (English：Random-access memory, abbreviation：RAM)；Memory can also include nonvolatile memory
(English：Non-volatile memory), such as flash memory (English：Flash memory), hard disk (English：hard
Disk drive, abbreviation：HDD) or solid state disk is (English：Solid-state drive, abbreviation：SSD)；Memory 504 is also
It can include the combination of the memory of mentioned kind.
Wherein, processor 501 can be central processing unit (English：Central processing unit, abbreviation：
CPU), network processing unit (English：Network processor, abbreviation：) or the combination of CPU and NP NP.
Wherein, processor 501 can further include hardware chip.Above-mentioned hardware chip can be special integrated electricity
Road (English：Application-specific integrated circuit, abbreviation：ASIC), programmable logic device (English
Text：Programmable logic device, abbreviation：PLD) or it is combined.Above-mentioned PLD can be complicated programmable logic device
Part (English：Complex programmable logic device, abbreviation：CPLD), field programmable gate array (English
Text：Field-programmable gate array, abbreviation：FPGA), Universal Array Logic (English：generic array
Logic, abbreviation：GAL) or it is combined.
Optionally, memory 504 is additionally operable to storage program instruction.Processor 501 can be instructed with caller, be realized such as
Fan failure detection method shown in the application Fig. 1 embodiments.
The embodiment of the present invention additionally provides a kind of non-transient computer storage medium, the computer storage media storage
There are computer executable instructions, which can perform the fan failure inspection in above-mentioned any means embodiment
Survey method.Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM),
Random access memory (Random Access Memory, RAM), flash memory (Flash Memory), hard disk (Hard
Disk Drive, abbreviation：) or solid state disk (Solid-State Drive, SSD) etc. HDD；The storage medium can be with
The combination of memory including mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from this hair
Various modification can be adapted in the case of bright spirit and scope and modification, and such modifications and variations are each fallen within will by appended right
It asks within limited range.
Claims (16)
1. a kind of fan failure detection method, which is characterized in that including：
Obtain the temperature value in the specified power cabinet preset range of current transformer；
Obtain deviation value of the temperature value in the specified power cabinet preset range compared with the first predetermined temperature threshold；
The fan that the specified power cabinet is detected according to the deviation value whether there is failure.
2. according to the method described in claim 1, it is characterized in that, obtain the temperature value in the specified power cabinet preset range
Before deviation value compared with the first predetermined temperature threshold, further include：
Obtain multiple temperature values in multiple power cabinet preset ranges of the current transformer；
The average value of the multiple temperature value is calculated, using the average value as first predetermined temperature threshold.
3. it according to the method described in claim 2, it is characterized in that, obtains in multiple power cabinet preset ranges of the current transformer
Multiple temperature values include：
Obtain multiple initial temperature values in multiple power cabinet preset ranges of the current transformer；
Low-pass filtering treatment is carried out to the multiple initial temperature value and obtains the multiple temperature value.
4. according to the method described in claim 3, it is characterized in that, low-pass filtering treatment is carried out to the multiple initial temperature value
Obtaining the multiple temperature value includes：
The multiple temperature value is obtained by equation below：
Ti_f (k)=k1*Ti (k)+k2*Ti_f (k-1)；K1=Ts/ (Ts+Tf), K2=1-K1；
Wherein, Ti_f (k) is the temperature value in i-th of power cabinet preset range of current transformer described in current period；Ti (k) is to work as
Initial temperature value in i-th of power cabinet preset range of current transformer described in the preceding cycle；Ti_f (k-1) was change described in a upper cycle
Flow the temperature value in i-th of power cabinet preset range of device；Ts is the sampling period；Tf is filtering time length.
5. according to the method described in claim 1, it is characterized in that, obtain the temperature value in the specified power cabinet preset range
Deviation value compared with the first predetermined temperature threshold includes：
The difference of the temperature value and first predetermined temperature threshold in the specified power cabinet preset range is calculated, by the difference
The ratio of value and first predetermined temperature threshold is as the deviation value.
6. according to any method in claim 1 to 5, which is characterized in that specified according to deviation value detection is described
The fan of power cabinet includes with the presence or absence of failure：
By the deviation value compared with the second predetermined temperature threshold：
When the deviation value is more than second predetermined temperature threshold, determining the fan of the specified power cabinet, there are failures.
7. according to any method in claim 1 to 5, which is characterized in that the specified power cabinet for obtaining current transformer makes a reservation for
In the range of temperature value include：
Obtain the return air inlet of the specified power cabinet or the temperature value of air outlet.
8. a kind of fan fault detection device, which is characterized in that including：
First acquisition module, for obtaining the temperature value in the specified power cabinet preset range of current transformer；
Second acquisition module, for obtaining the temperature value in the specified power cabinet preset range compared with the first predetermined temperature threshold
The deviation value of value；
Detection module whether there is failure for detecting the fan of the specified power cabinet according to the deviation value.
9. device according to claim 8, which is characterized in that described device further includes：
3rd acquisition module, for obtaining the temperature value phase in the specified power cabinet preset range in second acquisition module
Before the deviation value of the first predetermined temperature threshold, multiple temperature in multiple power cabinet preset ranges of the current transformer are obtained
Angle value；
Computing module, for calculating the average value of the multiple temperature value, using the average value as first predetermined temperature
Threshold value.
10. device according to claim 9, which is characterized in that the 3rd acquisition module includes：
Acquiring unit, for obtaining multiple initial temperature values in multiple power cabinet preset ranges of the current transformer；
Processing unit obtains the multiple temperature value for carrying out low-pass filtering treatment to the multiple initial temperature value.
11. device according to claim 10, which is characterized in that the processing unit is additionally operable to obtain by equation below
The multiple temperature value：
Ti_f (k)=k1*Ti (k)+k2*Ti_f (k-1)；K1=Ts/ (Ts+Tf), K2=1-K1；
Wherein, Ti_f (k) is the temperature value in i-th of power cabinet preset range of current transformer described in current period；Ti (k) is to work as
Initial temperature value in i-th of power cabinet preset range of current transformer described in the preceding cycle；Ti_f (k-1) was change described in a upper cycle
Flow the temperature value in i-th of power cabinet preset range of device；Ts is the sampling period；Tf is filtering time length.
12. device according to claim 8, which is characterized in that second acquisition module is additionally operable to calculate described specify
Temperature value and the difference of first predetermined temperature threshold in power cabinet preset range, the difference and described first are made a reservation for
The ratio of temperature threshold is as the deviation value.
13. according to any device in claim 8 to 12, which is characterized in that the detection module includes：
Comparing unit, for by the deviation value compared with the second predetermined temperature threshold：
Determination unit, for when the deviation value is more than second predetermined temperature threshold, determining the specified power cabinet
There are failures for fan.
14. according to any device in claim 8 to 12, which is characterized in that first acquisition module is additionally operable to obtain
Take the return air inlet of the specified power cabinet or the temperature value of air outlet.
15. a kind of current transformer, which is characterized in that including：
Temperature sensor, memory and processor mutually communicate between the temperature sensor, the memory and the processor
Letter connection, the temperature sensor are used to gathering multiple temperature values in multiple power cabinet preset ranges of current transformer, and by institute
It states multiple temperature values and is sent to the processor, computer instruction is stored in the memory, the processor passes through execution
The computer instruction, so as to perform any fan failure detection method in the claims 1-7.
16. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
Order, the computer instruction correspond to the fan failure detection method any one of claim 1-7.
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