CN109976408A - Realize the transformer temperature control system and method for air cooling system condition diagnosing - Google Patents
Realize the transformer temperature control system and method for air cooling system condition diagnosing Download PDFInfo
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- CN109976408A CN109976408A CN201910266605.8A CN201910266605A CN109976408A CN 109976408 A CN109976408 A CN 109976408A CN 201910266605 A CN201910266605 A CN 201910266605A CN 109976408 A CN109976408 A CN 109976408A
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- temperature
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- air cooling
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- General Physics & Mathematics (AREA)
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- Automation & Control Theory (AREA)
- Transformer Cooling (AREA)
Abstract
Present disclose provides a kind of transformer temperature control system for realizing air cooling system condition diagnosing and methods, including control unit and detection unit, detection unit includes multi way temperature signal detection module and voltage and current signal detection module, multi way temperature signal detection module includes being arranged inside transformer low voltage winding, acquire the detection module of winding temperature, and the detection module of acquisition environment temperature or iron core temperature, voltage and current signal detection module is arranged on each phase/line of blower of air cooling system, the signal of above-mentioned detection module acquisition is after amplification module, switching to data-signal by A/D conversion module；Control unit includes controller, and the controller is according to the temperature of acquisition and the voltage and current of blower, control and fault diagnosis to the start and stop and operating status that carry out blower, and records control process and diagnostic result.
Description
Technical field
This disclosure relates to a kind of transformer temperature control system for realizing air cooling system condition diagnosing and method.
Background technique
Only there is provided background technical informations relevant to the disclosure for the statement of this part, it is not necessary to so constitute first skill
Art.
Temperature control device is the automatic measurement and control device to guarantee dry-type power transformer safe and stable operation in certain temperature.
Existing apparatus, which is all made of, mostly uses the air-cooled type of cooling, and general every transformer is both needed to configuration temperature control device control cooling blower and opens
Stop and alarm signal or tripping grinder are provided to abnormal over-temperature condition, realizes function of temperature control.Actual industrial environment is complicated, live wind
The factors such as wall, dust interfere the stable operation of blower.It is accurate in real time to obtain blower fan system operating status, to extension blower
Service life, fault pre-alarming diagnosis ensure that transformer stablizes safe operation and has very important significance.
Summary of the invention
The disclosure to solve the above-mentioned problems, proposes a kind of transformer temperature control system for realizing air cooling system condition diagnosing
And method, the disclosure obtain fan operation parameter by accurate in real time, monitoring control diagnosis fan operation state, have control,
The functions such as protection, condition diagnosing, data storage, telecommunication.
According to some embodiments, the disclosure is adopted the following technical scheme that
A kind of transformer temperature control system for realizing air cooling system condition diagnosing, including control unit and detection unit, wherein
The detection unit includes multi way temperature signal detection module and voltage and current signal detection module, the multi way temperature signal inspection
Surveying module includes the detection module for being arranged in inside transformer low voltage winding, acquiring winding temperature, and acquisition environment temperature
Or the detection module of iron core temperature, on each phase/line of the blower that air cooling system is arranged in the voltage and current signal detection module, on
The signal of detection module acquisition is stated after amplification module, is switching to data-signal by A/D conversion module；
Described control unit includes controller, the controller according to the temperature of acquisition and the voltage and current of blower, into
The start and stop of row blower and the control of operating status and fault diagnosis, and record control process and diagnostic result.
It is limited as further, the controller is connected with input module, and the input module includes but is not limited to function
It can key, start and stop key.
It is limited as further, the A/D conversion module can be separate modular, be also possible to controller built-in mould
Block.
It is limited as further, the controller is also configured with output module, and the output module includes but is not limited to
Display module, indicating module.
A kind of transformer temperature control method for realizing air cooling system condition diagnosing, comprising:
Temperature control link: according to the temperature of acquisition, different threshold values is arranged in the temperature rise of calculating transformer, if temperature rise is higher than
First threshold starts blower；If temperature rise is higher than second threshold, excess temperature alarm is issued；If temperature rise is higher than third threshold value, control
The tripping of transformer chamber door；
Air-cooled link: after blower is activated, according to the voltage and current data of blower, being calculated the power of blower, if
Lower limit value and upper limit value are set, power is abnormal when power of fan is more than upper lower limit value or when shutting down, and judges fan trouble.
It is limited as further, the temperature rise of the transformer is the temperature of three-phase windings and the difference of environment temperature.
It is limited as further, during fan operation, the voltage and current of real-time monitoring blower driving power, when
Warning information is provided when abnormal.
It is limited as further, all fault datas, which generate, records and stores for future reference, realization each point temperature and blower
The continuous data of operating parameter stores and statistical analysis.
It limits as further, according to the voltage and current data of blower, is carried out using discrete fourier transform algorithm
Fundamental extraction and frequency analysis calculate amplitude and obtain, obtain the active power, reactive power and power perspective of blower.
It is limited as further, having any temperature rise all the way is more than given threshold, and maintains setting duration, is executed corresponding
Operation.
A kind of computer readable storage medium, wherein being stored with a plurality of instruction, described instruction is suitable for by terminal device
Reason device loads and executes a kind of transformer temperature control method for realizing air cooling system condition diagnosing.
A kind of terminal device, including processor and computer readable storage medium, processor is for realizing each instruction；It calculates
Machine readable storage medium storing program for executing is suitable for being loaded by processor and being executed a kind of realization wind for storing a plurality of instruction, described instruction
The transformer temperature control method of cooling system condition diagnosing.
Compared with prior art, the disclosure has the beneficial effect that
The disclosure obtains fan operation parameter by accurate in real time, monitoring control diagnosis fan operation state, have control,
The functions such as protection, condition diagnosing, data storage, telecommunication.
The disclosure generates corresponding blower start and stop, overtemperature alarm and overtemperature tripping control letter by setting different threshold values
Number.And it is diagnosed as abnormality of temperature sensors when any drive test amount temperature value and rate of temperature change deviation normal range (NR), and in failure
Shi Jinhang trips and records in time, can guarantee the normal work of transformer, and finds moving law.
All fault datas, which generate, records and stores for future reference, the continuous data of realization each point temperature and fan operation parameter
Storage and function of statistic analysis, for further administrative analysis.
The disclosure due to recording the voltage and current data of blower, it can be achieved that blower power consumption accumulating function in real time.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the hardware system figure of the present embodiment；
Fig. 2 is the typical wiring figure of the present embodiment；
Fig. 3 is the P2 temp probe terminal definition figure of the present embodiment；
Fig. 4 is the operation panel figure of the present embodiment；
Fig. 5 is the sampling flow chart of embodiment；
Specific embodiment:
The disclosure is described further with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
A kind of achievable dry-type transformer real time temperature automatically control and air cooling system on-line fault diagnosis it is intelligent from
Dynamic measure and control device.(fan operation parameter is obtained by accurate in real time, monitoring control diagnosis fan operation state has control, protects
The functions such as shield, condition diagnosing, data storage, telecommunication.
The present embodiment is using 32 ARM microcontroller stm32F103 as live center cell.Realize multi way temperature and electricity
Current voltage signal detection.Thermometric mode is most hot place, pre-buried three platinum resistance thermometer sensor,s inside dry-type transformer low pressure winding.It can fit
With single-phase/three-phase blower, by voltage transformer and current transformer, real-time detection obtains each phase/line voltage, electric current.By
After LM258 operational amplification circuit, handled using 12 A/D multichannel circulating samplings built in STM32.By central controller operation
After processing, corresponding control instruction is issued.CAT24WC256 extension storage, IIC mode communicate, and what lifting device data stored can
By property.It is equipped with RS485 interface, is realized and the functions such as the long-range real-time communication of user equipment.Using in LCD12864 large-screen lc
English display and menu mode operation.Five LED information display system status indicator lamps realize acousto-optic instruction alarm in conjunction with buzzer.System
Hardware system and external connection difference are as depicted in figs. 1 and 2.
Including temperature control system and air cooling system two parts.
The control object of temperature control system is the temperature in dry-type transformer, and input quantity is the temperature and environment temperature of three-phase windings
It spends (or iron core winding temperature) (1) control protection: by setting different threshold values, generating corresponding blower start and stop, overtemperature alarm
It trips with overtemperature and controls signal.(2) fault diagnosis: any drive test amount temperature value and temperatureChange rateIt is diagnosed when deviateing normal range (NR)
For abnormality of temperature sensors.
The control object of air cooling system is blower, and input quantity is fan power voltage signal, loop current signals.With reference to shape
State amount is the electric parameters such as blower active power, reactive power, power factor.(1) blower start-up course is in the positive reason of fan power
Under condition, for blower active power lower than preset lower limit or when being higher than upper limit value, diagnosis blower is abnormal.(2) in device operational process,
Monitoring blower driving power, when driving power exception, provide warning information in real time.(3) detection blower fan circuit during fan parking
Electric current and power provide air-blower control failure warning information when abnormal.
Any supply voltage is more than the maximum value or minimum value set, is diagnosed as blower exception.Fan power is avoided to lack
Phase or power voltage insufficient cause rotation speed of fan low.
In the normal situation of supply voltage, power and three-phase current are monitored, power or any one electric current are beyond restriction model
It encloses and is diagnosed as blower exception.
All fault datas, which generate, records and stores for future reference, the continuous data of realization each point temperature and fan operation parameter
Storage and function of statistic analysis, can also remotely reach host computer, further administrative analysis by RS485.
2 road external switch amount of standard configuration acquires (can be extended to the road 6-8), and the dry switch state for becoming outer chamber door of real-time monitoring leads to
It crosses soft pressing plate selection investment or exits enabling trip avoidance function.
Blower power consumption accumulating function can be achieved.
The major function of system provided in this embodiment includes:
1, real time data detection function
1.1 4 tunnel temperature real-time detections, three tunnels be three-phase windings temperature, thermometric mode be dry-type transformer low pressure around
The internal most hot place of group, pre-buried three platinum resistance thermometer sensor,s (PT100, CU50 etc. can be matched) (such as Fig. 3).4th tunnel is environment temperature or iron
Core temperature.It is temperature rise that the winding temperature detected, which subtracts environment temperature,.Temperature range -25~200 degree, 0.1 degree of resolution ratio.
1.2 adaptation single-phase/three-phase blowers, by voltage transformer and current transformer, real-time detection obtains each phase/line electricity
Press (fan power), electric current (blower loop current).After operational amplification circuit, handled by 12 A/D circulating samplings.In conjunction with
Discrete Fourier transform (DFT) algorithm carries out fundamental extraction and amplitude calculates, and filters out harmonic wave and obtains precise and stable voltage value, essence
Degree is up to 0.01 degree.The parameters such as P, Q, COS, F are calculated by sampled data in real time, data is provided for system operation and maintenance and supports.
Specifically, as shown in figure 5,24 point DFT Sampling analysis process are as follows:
The formula (direct transform) of DFT: x (n) is set as the finite length sequence of M point, i.e., has value in 0≤n≤M-1, then defines x
(n) N point (N >=M.As N > M, N-M zero point is mended), discrete fourier variation is defined as
This programming uses 24 DFT transforms.It is arranged using stm32 timer internal and interrupts the sampling time, between sampling
It is 833us every the time, 24 points are a cycle, i.e. N=24.
Formula 1 is further spread out
The amplitude of real part may be expressed as:
The amplitude of imaginary part may be expressed as:
Then final voltage magnitude is represented by formula 3
Fundamental extraction: in general, any periodic waveform can be launched into Fourier space
It is f that f (t), which is a frequency, in formula0=50 periodic function, angular frequency ω0=2 π f0,
For each harmonic of f (t), when h=1, i.e.,It can extract base
Wave component participates in calculating.
1.3 2 way switch amounts acquire and displacement memory channel (can be extended to the road 6-8) in real time.
2, control, protection and on-line fault diagnosis
2.1 blowers open/stop and control
Blower automatically controls: the 3 road any roads of PT100 temperature are greater than blower and start set temperature, and for 2 seconds, control is opened
Blower lights panel blower indicator light；3 tunnel temperature are below blower and stop set temperature, and for 5 seconds, blower is closed in control, from
It is dynamic to extinguish panel blower indicator light.
Blower manually controls: operator according to actual needs, press by the blower " open/stop " on manually controllable operation panel
Key.Key starting blower, fan operation, operation panel blower indicator light are bright；Key stops blower, and blower is closed, operation panel
Indicator light off for blower.
The alarm of 2.2 excess temperatures
Any road is greater than excess temperature alert settings temperature in 3 tunnel temperature, for 2 seconds, starts excess temperature alarm relay, same to time point
Bright panel excess temperature indicator light, warn resultant signal；
3 tunnel temperature are below 5 DEG C of excess temperature alarm temperature setting value hereinafter, for 10 seconds, and excess temperature alarm relay returns.Face
Plate excess temperature indicator light, advance notice resultant signal return after involution.
After excess temperature alarm event occurs, genesis sequence logout is simultaneously stored for future reference.
The tripping of 2.3 overtemperatures
Any road is greater than overtemperature tripping set temperature, for 5 seconds, starting tripping relay in 3 tunnel temperature, while lighting face
Plate tripping indicator light, triggering accident resultant signal；
3 tunnel temperature are below 5 DEG C of overtemperature trip temperature setting value hereinafter, for 10 seconds, and overtemperature tripping relay returns.
After overtemperature trip event occurs, genesis sequence logout, tripping are reported and are stored for future reference.
The monitoring of 2.4 blower driving powers
In device operational process, blower driving power is monitored in real time.When driving power exception, pass through buzzer and charactron
Audible and visual alarm signal is provided, and in liquid crystal screen display page prompts information.
The monitoring of 2.5 air-blower control circuit failures
Detection blower fan loop current and power, provide acousto-optic by buzzer and indicator light when abnormal during fan parking
Alarm signal, and in liquid crystal screen display page prompts information.
2.6 fan operation abnormity diagnosis
Detection blower fan loop current, active power in blower start-up course；Fan power under normal circumstances, blower is active
For power lower than preset lower limit or when being higher than upper limit value, diagnosis blower is abnormal.
2.7PT100 temperature sensor status monitoring
Any drive test amount temperature value and rate of temperature change are diagnosed as abnormality of temperature sensors when deviateing normal range (NR), light face
Plate malfunction indicator lamp, driving advance notice resultant signal relay.
2.8 chamber door position detections and tripping of opening the door
2 road external switch amount of XRTTC device standard configuration acquires (can be extended to the road 6-8), and real-time monitoring is dry to become opening for outer chamber door
Off status selects investment by soft pressing plate or exits enabling trip avoidance function.
2.9 perpetual calendar
Low speed crystal oscillator outside 32MHz is called, realizes the timing of RTC clock second.RTC block and clock configuration are arranged in back-up area
Domain still remains unchanged in system reset or from the setting of RTC and time after standby mode wake-up.
Specific operation panel can choose form as shown in Figure 4, specifically include display screen, state display module and control
Key processed.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (9)
1. a kind of transformer temperature control system for realizing air cooling system condition diagnosing, it is characterized in that: including that control unit and detection are single
Member, wherein the detection unit includes multi way temperature signal detection module and voltage and current signal detection module, the multichannel temperature
Spending signal detection module includes the detection module for being arranged in inside transformer low voltage winding, acquiring winding temperature, and acquisition
The detection module of environment temperature or iron core temperature, the blower that air cooling system is arranged in the voltage and current signal detection module are each
On phase/line, the signal of above-mentioned detection module acquisition is switching to data-signal by A/D conversion module after amplification module；
Described control unit includes controller, and the controller is according to the temperature of acquisition and the voltage and current of blower, to progress wind
The start and stop of machine and the control of operating status and fault diagnosis, and record control process and diagnostic result.
2. a kind of transformer temperature control system for realizing air cooling system condition diagnosing as described in claim 1, it is characterized in that: described
Controller is connected with input module, and the input module includes but is not limited to function button, start and stop key.
3. a kind of transformer temperature control system for realizing air cooling system condition diagnosing as described in claim 1, it is characterized in that: described
Controller is also configured with output module, and the output module includes but is not limited to display module, indicating module.
4. a kind of transformer temperature control method for realizing air cooling system condition diagnosing, it is characterized in that: including:
Temperature control link: according to the temperature of acquisition, different threshold values is arranged in the temperature rise of calculating transformer, if temperature rise is higher than first
Threshold value starts blower；If temperature rise is higher than second threshold, excess temperature alarm is issued；If temperature rise is higher than third threshold value, transformation is controlled
The tripping of device chamber door；
Air-cooled link: after blower is activated, according to the voltage and current data of blower, the power of blower is calculated, under setting
Limit value and upper limit value, power is abnormal when power of fan is more than upper lower limit value or when shutting down, and judges fan trouble.
5. a kind of transformer temperature control method for realizing air cooling system condition diagnosing as claimed in claim 54, it is characterized in that: working as
During fan operation, the voltage and current of real-time monitoring blower driving power provides warning information when exception.
6. a kind of transformer temperature control method for realizing air cooling system condition diagnosing as claimed in claim 4, it is characterized in that: all
Fault data, which generates, records and stores for future reference, the continuous data storage of realization each point temperature and fan operation parameter and statistical
Analysis.
7. a kind of transformer temperature control method for realizing air cooling system condition diagnosing as claimed in claim 4, it is characterized in that: according to
The voltage and current data of blower carry out fundamental extraction and frequency analysis using discrete fourier transform algorithm, calculate amplitude and obtain
It arrives, obtains the active power, reactive power and power perspective of blower.
8. a kind of transformer temperature control method for realizing air cooling system condition diagnosing as claimed in claim 4, appoints it is characterized in that: having
Temperature rise is more than given threshold to meaning all the way, and maintains setting duration, executes corresponding operation.
9. a kind of terminal device, including processor and computer readable storage medium, processor is for realizing each instruction；Computer
Readable storage medium storing program for executing is for storing a plurality of instruction, it is characterized in that: described instruction is suitable for by processor load and perform claim requirement
A kind of transformer temperature control method for realizing air cooling system condition diagnosing described in any one of 4-8.
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Cited By (7)
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| CN111181472A (en) * | 2019-12-24 | 2020-05-19 | 无锡艾柯威科技有限公司 | Protection control method of fan controller |
| CN111538390A (en) * | 2020-03-27 | 2020-08-14 | 努比亚技术有限公司 | Method for controlling terminal temperature, terminal and computer readable storage medium |
| CN112394298A (en) * | 2020-12-01 | 2021-02-23 | 杭州沃伦森电气有限公司 | Method for detecting turn-to-turn short circuit of reactor |
| CN112505422A (en) * | 2020-12-01 | 2021-03-16 | 杭州沃伦森电气有限公司 | Real-time acquisition method and monitoring method for branch impedance of capacitor bank |
| CN113158705A (en) * | 2020-01-07 | 2021-07-23 | 株洲中车时代电气股份有限公司 | Fan fault prediction and health management device and method |
| CN113961023A (en) * | 2021-10-25 | 2022-01-21 | 福建省力得自动化设备有限公司 | Temperature control system based on dry-type transformer |
| CN115223774A (en) * | 2022-06-13 | 2022-10-21 | 广东科源电气股份有限公司 | Dry-type transformer state monitoring device and control method thereof |
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| CN111181472A (en) * | 2019-12-24 | 2020-05-19 | 无锡艾柯威科技有限公司 | Protection control method of fan controller |
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| CN112394298A (en) * | 2020-12-01 | 2021-02-23 | 杭州沃伦森电气有限公司 | Method for detecting turn-to-turn short circuit of reactor |
| CN112505422A (en) * | 2020-12-01 | 2021-03-16 | 杭州沃伦森电气有限公司 | Real-time acquisition method and monitoring method for branch impedance of capacitor bank |
| CN113961023A (en) * | 2021-10-25 | 2022-01-21 | 福建省力得自动化设备有限公司 | Temperature control system based on dry-type transformer |
| CN115223774A (en) * | 2022-06-13 | 2022-10-21 | 广东科源电气股份有限公司 | Dry-type transformer state monitoring device and control method thereof |
| CN115223774B (en) * | 2022-06-13 | 2023-08-29 | 广东科源电气股份有限公司 | State monitoring device for dry-type transformer and control method thereof |
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Application publication date: 20190705 |
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