CN108051234B - 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 invention relates to the field of fan control, in particular to a fan fault detection method, a fan fault detection device, a current transformer and a computer readable storage medium.
Background
The grid-connected converter of the wind driven generator has high power level and large heat productivity, so the heat dissipation problem is always concerned. The conventional heat exchange means includes: natural air convection heat dissipation, forced air cooling, water cooling and the like. In forced air cooling heat dissipation, a fan is one of the most important components, and the working condition of the fan directly influences the operation performance of equipment. Because the fan is in the wind channel, the environment is relatively bad, and is in a mechanical rotation state, the fan may age and damage after long-time use, or may block due to external force in the use process. If the converter still continues to work after the fan fails and cannot normally operate, the converter may be damaged due to overheating, and thus a large loss is caused, so that the fan failure detection is particularly important.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for detecting a fan fault, an inverter, and a computer-readable storage medium, so as to detect a fan fault.
Therefore, the embodiment of the invention provides the following technical scheme:
in a first aspect of the present invention, a method for detecting a fan fault is provided, where the method includes: 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 specified power cabinet has a fault according to the deviation value.
Therefore, the operating state of the fan corresponding to the power cabinet is evaluated by analyzing the temperature value in the preset range of the power cabinet of the converter.
Optionally, before obtaining a deviation value of the temperature value within the predetermined range of the designated power cabinet from the first predetermined temperature threshold, the method further includes: acquiring a plurality of temperature values in a preset range of a plurality of power cabinets of the converter; calculating an average value of the plurality of temperature values, and taking the average value as the first preset temperature threshold value.
The average temperature values of the power cabinets of the converter are relatively close to the temperature values when the running states of the fans of the power cabinets are normal, so that the average value is used as a judgment standard to estimate whether the running state of the fan is normal.
Optionally, the obtaining a plurality of temperature values within a predetermined range of a plurality of power cabinets of the converter comprises: acquiring a plurality of initial temperature values of a plurality of power cabinets of the converter within a preset range; and carrying out low-pass filtering processing on the plurality of initial temperature values to obtain the plurality of temperature values.
Since the temperature data may be subject to jumps due to electromagnetic interference, the temperature data is low-pass filtered by this alternative embodiment.
Optionally, the obtaining the plurality of temperature values by performing low-pass filtering on the plurality of initial temperature values includes: the plurality of temperature values is obtained by the following formula: ti _ f (k) ═ k1 × Ti (k) + k2 × Ti _ f (k-1); k1 ═ Ts/(Ts + Tf), K2 ═ 1-K1; wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the current transformer in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is a temperature value in a preset range of the ith power cabinet of the converter in the previous period; ts is a sampling period; tf is the filtering time length.
The temperature data with electromagnetic interference removed can be obtained through the specific first-order inertia filtering algorithm.
Optionally, the obtaining a deviation value of the temperature value within the predetermined range of the designated power cabinet from the first predetermined temperature threshold comprises: calculating the difference value between the temperature value in the preset range of the specified power cabinet and the first preset temperature threshold value, and taking the ratio of the difference value to the first preset temperature threshold value as the deviation value.
In a parallel embodiment corresponding to the alternative embodiment, the difference between the temperature value in the predetermined range of the designated power cabinet and the first predetermined temperature threshold may also be the deviation value.
Optionally, the detecting whether the fan of the designated power cabinet has a fault according to the deviation value includes: comparing the deviation value with a second predetermined temperature threshold: determining that a fan of the designated power cabinet is faulty when the deviation value is greater than the second predetermined temperature threshold.
The operating state of the fan can be accurately reflected by the deviation value.
Optionally, the obtaining of the temperature value within the predetermined range of the designated power cabinet of the converter includes: and acquiring the temperature value of the return air inlet or the air outlet of the specified power cabinet.
The temperature of the air return opening or the air outlet of the designated power cabinet is higher, so that the fault judgment of the fan is more facilitated.
In a second aspect of the present invention, there is provided a fan failure detection apparatus, comprising: the first acquisition module is used for acquiring a temperature value of the converter within a preset range of a specified power cabinet; the second acquisition module is used for acquiring a deviation value of the temperature value in the preset range of the specified power cabinet relative to a first preset temperature threshold value; and the detection module is used for detecting whether the fan of the specified power cabinet has a fault according to the deviation value.
Therefore, the operating state of the fan corresponding to the power cabinet is evaluated by analyzing the temperature value in the preset range of the power cabinet of the converter.
Optionally, the apparatus further comprises: a third obtaining module, configured to obtain a plurality of temperature values in a plurality of power cabinets of the converter in a predetermined range before the second obtaining module obtains a deviation value of the temperature value in the predetermined range of the designated power cabinet relative to the first predetermined temperature threshold; and the calculation module is used for calculating the average value of the temperature values, and taking the average value as the first preset temperature threshold value.
The average temperature values of the power cabinets of the converter are relatively close to the temperature values when the running states of the fans of the power cabinets are normal, so that the average value is used as a judgment standard to estimate whether the running state of the fan is normal.
Optionally, the third obtaining module includes: the acquisition unit is used for acquiring a plurality of initial temperature values in a predetermined range of a plurality of power cabinets of the converter; and the processing unit is used for carrying out low-pass filtering processing on the plurality of initial temperature values to obtain the plurality of temperature values.
Since the temperature data may be subject to jumps due to electromagnetic interference, the temperature data is low-pass filtered by this alternative embodiment.
Optionally, the processing unit is further configured to obtain the plurality of temperature values by the following formula: ti _ f (k) ═ k1 × Ti (k) + k2 × Ti _ f (k-1); k1 ═ Ts/(Ts + Tf), K2 ═ 1-K1; wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the current transformer in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is a temperature value in a preset range of the ith power cabinet of the converter in the previous period; ts is sampling period; tf is the filtering time length.
The temperature data with electromagnetic interference removed can be obtained through the specific first-order inertia filtering algorithm.
Optionally, the second obtaining module is further configured to calculate a difference between a temperature value in the predetermined range of the specified power cabinet and the first predetermined temperature threshold, and use a ratio of the difference to the first predetermined temperature threshold as the deviation value.
In a parallel embodiment corresponding to the alternative embodiment, the difference between the temperature value in the predetermined range of the designated power cabinet and the first predetermined temperature threshold may also be the deviation value.
Optionally, the detection module includes: a comparison unit for comparing the deviation value with a second predetermined temperature threshold: a determining unit, configured to determine that a fan of the designated power cabinet has a fault when the deviation value is greater than the second predetermined temperature threshold.
The operating state of the fan can be accurately reflected by the deviation value.
Optionally, the first obtaining module is further configured to obtain a temperature value of an air return opening or an air outlet of the designated power cabinet.
The temperature of the air return opening or the air outlet of the designated power cabinet is higher, so that the fault judgment of the fan is more facilitated.
In a third aspect of the present invention, there is provided a converter, comprising: the fan fault detection method comprises a temperature sensor, a memory and a processor, wherein the temperature sensor, the memory and the processor are in communication connection with each other, the temperature sensor is used for collecting a plurality of temperature values in a preset range of a plurality of power cabinets of a converter and sending the temperature values to the processor, a computer instruction is stored in the memory, and the processor executes the computer instruction so as to execute the fan fault detection method in the first aspect.
In a fourth aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions for causing the computer to execute the fan failure detection method according to any one of the first aspect.
The technical scheme of the embodiment of the invention has the following advantages:
the embodiment of 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 specified power cabinet has a fault according to the deviation value, so that the fault of the fan is detected, and the service life of the converter is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method of fan fault detection according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a current transformer configuration according to an embodiment of the present invention;
fig. 3 is a block diagram of a structure of a fan malfunction detection apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of a converter according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of a converter according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The general wind power converter is composed of a power cabinet 1 and a power cabinet 2. power cabinet n, wherein each power cabinet is generally provided with an axial flow fan, an air duct, an air-water heat exchanger, a power heating component and the like. In this embodiment, a fan fault detection method is provided, which can be used for the wind power converter, and fig. 1 is a flowchart of the fan fault detection method according to the embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:
step S101, obtaining a temperature value of the converter within a preset range of a designated power cabinet. Because the temperature of the return air inlet or the air outlet of the power cabinet is higher, in an optional embodiment, the temperature of the return air inlet or the air outlet of the power cabinet is used as the basis for judging whether the operation state of the fan is normal or not, so that the operation state of the fan can be more accurately reflected.
Step S102, acquiring a deviation value of a temperature value in a preset range of the designated power cabinet relative to a first preset temperature threshold value. The average temperature value of a plurality of power cabinets of the converter is relatively close to each powerThe temperature values at which the operating states of the fans of the power cabinets are normal are obtained, so in an alternative embodiment, a plurality of temperature values within a predetermined range of a plurality of power cabinets of the converter are obtained, an average value of the plurality of temperature values is calculated, that is,
that is, μ represents an average value of the plurality of temperature values, and n represents the number of temperature data. The average value is taken as the first predetermined temperature threshold. The average value is used as a judgment standard, and whether the running state of the fan is normal or not can be estimated.
Regarding the deviation value, the deviation value can be obtained in various ways, and in an alternative embodiment, the difference value between the temperature value in the predetermined range of the designated power cabinet and the first predetermined temperature threshold value is calculated, and the ratio of the difference value and the first predetermined temperature threshold value is used as the deviation value, that is, the deviation value is obtained
σiRepresents the deviation value; in another alternative embodiment, the difference between the temperature value in the predetermined range of the designated power cabinet and the first predetermined temperature threshold may be the deviation value, i.e. σi＝Ti_f(k)-μ。
And step S103, detecting whether the fan of the specified power cabinet has a fault according to the deviation value.
Specifically, the deviation value is compared with a second predetermined temperature threshold value, when the deviation value is larger than the second predetermined temperature threshold value, the fan of the designated power cabinet is determined to have a fault, and when the deviation value is smaller than or equal to the second predetermined temperature threshold value, the fan of the designated power cabinet is determined to have no fault. Wherein the second predetermined temperature threshold may be a limit value σ of σ when the circulating fan in the power cabinet is tested to be in a normal state by a test methodmax. In another optional embodiment, it may also be determined whether the deviation value belongs to a predetermined interval, where the predetermined interval may be a preset interval when the normal state of the circulating fan in the power cabinet is tested by a test method, and when the deviation value belongs to the predetermined interval, the specified power is determinedAnd if the fan of the cabinet does not have a fault, determining that the fan of the specified power cabinet has a fault. In another alternative embodiment, when the number of the power cabinets of the converter is less than two, the temperature difference between the two power cabinets is calculated, and when the difference is greater than a preset threshold value, the fan of the power body with high temperature is considered to be failed. Those skilled in the art can implement the method in other ways in the prior art according to the description of the embodiment.
The temperature value of the converter can generally reflect the running state of the fan, and through the steps, the deviation value of the temperature around the power cabinet of the converter relative to the first preset temperature threshold value is used as a basis for judging the running state of the fan of the power cabinet, so that the fault detection of the fan is realized, and the service life of the converter is further prolonged.
Since the temperature data may jump due to electromagnetic interference, in an optional embodiment, a plurality of initial temperature values within a predetermined range of a plurality of power cabinets of the converter are obtained, and the plurality of initial temperature values are subjected to low-pass filtering processing to obtain the plurality of temperature values. Specifically, the plurality of temperature values are obtained by the following formula: ti _ f (k) ═ k1 × Ti (k) + k2 × Ti _ f (k-1); k1 ═ Ts/(Ts + Tf), K2 ═ 1-K1; wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the converter in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is the temperature value in the preset range of the ith power cabinet of the converter in the previous period; ts is a sampling period; tf is the filtering time length, for example, Tf is set to be 50 times Ts, for example, Ts is 20ms, and Tf is 1 s. The temperature data with electromagnetic interference removed can be obtained by the alternative embodiment by using a first-order inertial filtering algorithm.
The temperature of the return air inlet or the air outlet of the power cabinet can be acquired by a temperature sensor, as shown in fig. 2, the wind power converter is composed of a power cabinet 1, a power cabinet 2. power cabinet n, each power cabinet is generally provided with an axial flow fan, an air duct, an air-water heat exchanger, a power module, a temperature sensor and the like, and the temperature sensor is arranged at the return air inlet of the axial flow fan of each power cabinet, so that the temperature around each power cabinet can be acquired.
In this embodiment, a fan failure detection apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description already made is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 3 is a block diagram of a structure of a fan malfunction detection apparatus according to an embodiment of the present invention, as shown in fig. 3, the apparatus including: the first obtaining module 31 is configured to obtain a temperature value of the converter within a predetermined range of a designated power cabinet; a second obtaining module 32, configured to obtain a deviation value of a temperature value within a predetermined range of the specified power cabinet relative to a first predetermined temperature threshold; and the detection module 33 is configured to detect whether the fan of the designated power cabinet has a fault according to the deviation value.
Therefore, the operating state of the fan corresponding to the power cabinet is evaluated by analyzing the temperature value in the preset range of the power cabinet of the converter.
Fig. 4 is another block diagram of the fan malfunction detection apparatus according to the embodiment of the present invention, as shown in fig. 4, the apparatus further includes: a third obtaining module 41, configured to obtain a plurality of temperature values in a plurality of power cabinets of the converter in a predetermined range before the second obtaining module obtains a deviation value of the temperature value in the predetermined range of the designated power cabinet relative to the first predetermined temperature threshold; and a calculating module 42, configured to calculate an average value of the plurality of temperature values, where the average value is used as the first predetermined temperature threshold.
The average temperature values of the power cabinets of the converter are relatively close to the temperature values when the running states of the fans of the power cabinets are normal, so that the average value is used as a judgment standard to estimate whether the running state of the fan is normal.
Optionally, the third obtaining module 41 includes: an obtaining unit 411, configured to obtain multiple initial temperature values in multiple power cabinets of the converter within a predetermined range; the processing unit 412 is configured to perform low-pass filtering on the initial temperature values to obtain the temperature values.
Since the temperature data may be subject to jumps due to electromagnetic interference, the temperature data is low-pass filtered by this alternative embodiment.
Optionally, the processing unit is further configured to obtain the plurality of temperature values by the following formula: ti _ f (k) ═ k1 × Ti (k) + k2 × Ti _ f (k-1); k1 ═ Ts/(Ts + Tf), K2 ═ 1-K1; wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the converter in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is a temperature value in a preset range of the ith power cabinet of the converter in the last period; ts is a sampling period; tf is the filter time length.
The temperature data with electromagnetic interference removed can be obtained through the specific first-order inertia filtering algorithm.
Optionally, the second obtaining module is further configured to calculate a difference between the temperature value in the predetermined range of the designated power cabinet and the first predetermined temperature threshold, and use a ratio of the difference to the first predetermined temperature threshold as the deviation value.
In a parallel embodiment corresponding to the alternative embodiment, the difference between the temperature value in the predetermined range of the designated power cabinet and the first predetermined temperature threshold may also be the deviation value.
Optionally, the detection module comprises: a comparison unit for comparing the deviation value with a second predetermined temperature threshold: and the determining unit is used for determining that the fan of the specified power cabinet has a fault when the deviation value is greater than the second preset temperature threshold value. The operating state of the fan can be accurately reflected by the deviation value.
Optionally, the first obtaining module is further configured to obtain a temperature value of an air return opening or an air outlet of the designated power cabinet. The temperature of the air return opening or the air outlet of the appointed power cabinet is higher, so that the judgment of fan faults is facilitated.
The fan failure detection apparatus in this embodiment is in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory executing one or more software or fixed programs, and/or other devices that may provide the above-described functionality.
Further functional descriptions of the modules are the same as those of the corresponding embodiments, and are not repeated herein.
Referring to fig. 5, the converter may include: at least one processor 501, such as a CPU (central processing Unit), at least one communication interface 503, memory 504, at least one communication bus 502. Wherein a communication bus 502 is used to enable connectivity communication between these components. The communication interface 503 may include a Display (Display) and a Keyboard (Keyboard), and the optional communication interface 503 may also include a standard wired interface and a standard wireless interface. The Memory 504 may be a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The memory 504 may optionally be at least one storage device located remotely from the processor 501. Wherein the processor 501 may be combined with the apparatus described in fig. 3 or fig. 4, the memory 504 stores a set of program codes therein, and the processor 501 calls the program codes stored in the memory 504 for executing a fan failure detection method, namely for performing the following operations:
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 specified power cabinet has a fault according to the deviation value.
In the embodiment of the present invention, the processor 501 calls the program code in the memory 504, and is further configured to perform the following operations:
acquiring a plurality of temperature values in a preset range of a plurality of power cabinets of the converter;
calculating an average value of the plurality of temperature values, and taking the average value as the first preset temperature threshold value.
In the embodiment of the present invention, the processor 501 calls the program code in the memory 504, and is further configured to perform the following operations:
acquiring a plurality of initial temperature values of a plurality of power cabinets of the converter within a preset range;
and carrying out low-pass filtering processing on the plurality of initial temperature values to obtain the plurality of temperature values.
In the embodiment of the present invention, the processor 501 calls the program code in the memory 504, and is further configured to perform the following operations:
the plurality of temperature values is obtained by the following formula:
Ti_f(k)＝k1*Ti(k)+k2*Ti_f(k-1)；K1＝Ts/(Ts+Tf)，K2＝1-K1；
wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the current transformer in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is a temperature value in a preset range of the ith power cabinet of the converter in the previous period; ts is a sampling period; tf is the filtering time length.
In this embodiment of the present invention, the processor 501 calls the application program in the memory 504, and may further perform the following operations:
and calculating the difference value between the temperature value in the preset range of the designated power cabinet and the first preset temperature threshold value, and taking the ratio of the difference value to the first preset temperature threshold value as the deviation value.
In this embodiment of the present invention, the processor 501 calls the program code in the memory 504, and may further perform the following operations:
comparing the deviation value with a second predetermined temperature threshold:
and determining that the fan of the designated power cabinet has a fault when the deviation value is larger than the second preset temperature threshold value.
In this embodiment of the present invention, the processor 501 calls the program code in the memory 504, and may further perform the following operations:
and acquiring the temperature value of the air return opening or the air outlet of the appointed power cabinet.
The communication bus 502 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The communication bus 502 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
The memory 504 may include a volatile memory (RAM), such as a random-access memory (RAM); the memory may also include a non-volatile memory (english: flash memory), such as a hard disk (HDD) or a solid-state drive (SSD); the memory 504 may also comprise a combination of the above-described types of memory.
The processor 501 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of CPU and NP.
The processor 501 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), general-purpose array logic (GAL), or any combination thereof.
Optionally, the memory 504 is also used to store program instructions. The processor 501 may call program instructions to implement the fan failure detection method as shown in the embodiment of fig. 1 of the present application.
An embodiment of the present invention further provides a non-transitory computer storage medium, where a computer-executable instruction is stored in the computer storage medium, and the computer-executable instruction may execute the fan fault detection method in any of the above method embodiments. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a hard disk (hard disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (8)
1. A method of detecting a fan fault, comprising:
acquiring a temperature value of a current transformer within a preset range of a designated power cabinet; wherein, obtaining the temperature value within the preset range of the appointed power cabinet of the converter comprises: acquiring a temperature value of an air return inlet or an air outlet of the specified 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;
detecting whether the fan of the designated power cabinet has a fault according to the deviation value;
before obtaining the deviation value of the temperature value in the preset range of the specified power cabinet relative to the first preset temperature threshold, the method further comprises the following steps:
acquiring a plurality of temperature values in a preset range of a plurality of power cabinets of the converter; wherein obtaining a plurality of temperature values within a plurality of power cabinet predetermined ranges of the converter comprises: acquiring a plurality of initial temperature values of a plurality of power cabinets of the converter within a preset range; carrying out low-pass filtering processing on the plurality of initial temperature values to obtain a plurality of temperature values; the low-pass filtering the plurality of initial temperature values to obtain the plurality of temperature values comprises: the plurality of temperature values is obtained by the following formula: ti _ f (k) ═ k1 × Ti (k) + k2 × Ti _ f (k-1); k1 ═ Ts/(Ts + Tf), K2 ═ 1-K1; wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the current transformer in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is a temperature value in a preset range of the ith power cabinet of the converter in the previous period; ts is a sampling period; tf is the length of the filtering time;
calculating an average value of the plurality of temperature values, and taking the average value as the first preset temperature threshold value.
2. The method of claim 1, wherein obtaining a deviation value of a temperature value within a predetermined range of the designated power cabinet from a first predetermined temperature threshold comprises:
calculating the difference value between the temperature value in the preset range of the specified power cabinet and the first preset temperature threshold value, and taking the ratio of the difference value to the first preset temperature threshold value as the deviation value.
3. The method of claim 1 or 2, wherein detecting whether a fan of the designated power cabinet fails based on the deviation value comprises:
comparing the deviation value with a second predetermined temperature threshold:
determining that a fan of the designated power cabinet is faulty when the deviation value is greater than the second predetermined temperature threshold.
4. A fan failure detection apparatus, comprising:
the first acquisition module is used for acquiring a temperature value of the converter within a preset range of a specified power cabinet;
the second acquisition module is used for acquiring a deviation value of the temperature value in the preset range of the specified power cabinet relative to a first preset temperature threshold value;
the detection module is used for detecting whether the fan of the specified power cabinet has a fault according to the deviation value; the device further comprises:
a third obtaining module, configured to obtain a plurality of temperature values in a plurality of power cabinets of the converter in a predetermined range before the second obtaining module obtains a deviation value of the temperature value in the predetermined range of the designated power cabinet relative to the first predetermined temperature threshold; the third obtaining module includes: the acquisition unit is used for acquiring a plurality of initial temperature values in a predetermined range of a plurality of power cabinets of the converter; the processing unit is used for carrying out low-pass filtering processing on the plurality of initial temperature values to obtain a plurality of temperature values; the processing unit is further configured to obtain the plurality of temperature values by the following formula:
ti _ f (k) ═ k1 × Ti (k) + k2 × Ti _ f (k-1); k1 ═ Ts/(Ts + Tf), K2 ═ 1-K1; wherein, Ti _ f (k) is a temperature value in a preset range of the ith power cabinet of the current transformer in the current period; ti (k) is an initial temperature value in a preset range of the ith power cabinet of the converter in the current period; ti _ f (k-1) is a temperature value in a preset range of the ith power cabinet of the converter in the previous period; ts is a sampling period; tf is the length of the filtering time;
a calculation module, configured to calculate an average value of the plurality of temperature values, where the average value is used as the first predetermined temperature threshold;
the first obtaining module is further used for obtaining a temperature value of an air return opening or an air outlet of the appointed power cabinet.
5. The apparatus according to claim 4, wherein the second obtaining module is further configured to calculate a difference between the temperature value within the predetermined range of the designated power cabinet and the first predetermined temperature threshold, and use a ratio of the difference to the first predetermined temperature threshold as the deviation value.
6. The apparatus of claim 4 or 5, wherein the detection module comprises:
a comparison unit for comparing said deviation value with a second predetermined temperature threshold:
a determining unit, configured to determine that a fan of the designated power cabinet has a fault when the deviation value is greater than the second predetermined temperature threshold.
7. A current transformer, comprising:
the fan fault detection device comprises a temperature sensor, a memory and a processor, wherein the temperature sensor, the memory and the processor are in communication connection with each other, the temperature sensor is used for collecting a plurality of temperature values within a preset range of a plurality of power cabinets of a converter and sending the temperature values to the processor, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the fan fault detection method of any one of the claims 1 to 3.
8. A computer-readable storage medium storing computer instructions corresponding to the fan failure detection method of any one of claims 1-3.
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| CN111980950A (en) * | 2019-05-21 | 2020-11-24 | 维谛技术有限公司 | Method and system for judging fault of cooling fan |
| CN111142591A (en) * | 2019-12-24 | 2020-05-12 | 追觅科技(上海)有限公司 | Temperature sudden change detection method and device and storage medium |
| CN114855190A (en) * | 2022-03-07 | 2022-08-05 | 广西汇元锰业有限责任公司 | Post-curing device for manganese dioxide electrolytic bath anticorrosive coating |
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| CN102288323A (en) * | 2011-06-24 | 2011-12-21 | 中国北车集团大连机车车辆有限公司 | Method for monitoring temperature rising of traction motor of train |
| EP2551982B1 (en) * | 2011-07-27 | 2013-09-25 | Siemens Aktiengesellschaft | Thermal monitoring of a converter |
| CN102403882B (en) * | 2011-12-01 | 2014-05-21 | 浙江海得新能源有限公司 | Fault traversing converter |
| CN202649335U (en) * | 2012-04-18 | 2013-01-02 | 永济新时速电机电器有限责任公司 | Converter power module operation state monitoring device |
| CN102914380A (en) * | 2012-09-21 | 2013-02-06 | 北京天诚同创电气有限公司 | Temperature prediction method for brake resistor used by wind generating set converter |
| CN103226185B (en) * | 2013-03-26 | 2015-11-11 | 同济大学 | A kind of current transformator power module on-line fault diagnosis method based on Detecting Power Harmonics |
| CN104537791A (en) * | 2014-12-18 | 2015-04-22 | 北京天诚同创电气有限公司 | Fire monitoring method and device |
| CN204302422U (en) * | 2015-01-06 | 2015-04-29 | 北京天诚同创电气有限公司 | The failure detector of the IGBT of wind electric converter and failure protecting device |
| CN204832461U (en) * | 2015-08-14 | 2015-12-02 | 中国长江电力股份有限公司 | Generator excited system information on -line monitoring management system |
| CN107329012A (en) * | 2016-04-28 | 2017-11-07 | 北京金风科创风电设备有限公司 | Test system of wind generating set converter |
| CN106526363A (en) * | 2016-11-01 | 2017-03-22 | 株洲中车时代电气股份有限公司 | Converter power component online monitoring system |
| CN206331054U (en) * | 2016-12-15 | 2017-07-14 | 中电普瑞科技有限公司 | A kind of flexible transmission system analogue means of polymorphic type based on MMC |
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