CN109600021A - The radiator chocking-up degree of converter plant determines method and device - Google Patents
The radiator chocking-up degree of converter plant determines method and device Download PDFInfo
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- CN109600021A CN109600021A CN201811128323.3A CN201811128323A CN109600021A CN 109600021 A CN109600021 A CN 109600021A CN 201811128323 A CN201811128323 A CN 201811128323A CN 109600021 A CN109600021 A CN 109600021A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/209—Heat transfer by conduction from internal heat source to heat radiating structure
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Abstract
The radiator chocking-up degree that the embodiment of the present invention provides a kind of converter plant determines method and device, this method comprises: obtaining the first temperature of the radiator；According to first temperature, the power loss of preset temperature and the converter plant, the first thermal resistance is determined；The corresponding first group of sample data of the first thermal resistance and second group of sample data are determined in sample database, every group of sample data in the sample database includes the thermal resistance of a duration and the radiator after running the duration, and first thermal resistance is located between the third thermal resistance in the second thermal resistance and second group of sample data in first group of sample data；According to first thermal resistance, first group of sample data and second group of sample data, the chocking-up degree of the radiator is determined.Improve the accuracy of the chocking-up degree of determining radiator.
Description
Technical field
The present embodiments relate to rail traffic vehicles field more particularly to a kind of radiator chocking-up degrees of converter plant
Determine method and device.
Background technique
Rail traffic vehicles (for example, subway, high-speed rail etc.) usually have converter plant, are usually provided in converter plant scattered
Hot device, to disperse the heat of converter plant generation.
In the radiator course of work, a large amount of dust sticks on a heat sink, and radiator is caused to block, and influences radiator
To the heat sinking function of converter plant, and then reduce the security reliability of rail traffic vehicles operation.Therefore, in actual application
In, it needs to detect the chocking-up degree of radiator and tamper is cleared up in time, the peace of Lai Tigao rail traffic vehicles operation
Full reliability.In the prior art, usually radiator is seen by staff when rail traffic vehicles run stopping
It examines, and determines the chocking-up degree of radiator according to working experience.
However, being difficult accurately to determine the chocking-up degree of radiator, causing in the artificial chocking-up degree for determining radiator
Determine that the accuracy for the chocking-up degree for obtaining radiator is lower.
Summary of the invention
The radiator chocking-up degree that the embodiment of the present invention provides a kind of converter plant determines method and device, improves to scattered
The accuracy of the chocking-up degree judgement of hot device.
In a first aspect, the radiator chocking-up degree that the embodiment of the present invention provides a kind of converter plant determines method, comprising:
Obtain the first temperature of the radiator；
According to first temperature, the power loss of preset temperature and the converter plant, the first thermal resistance is determined；
The corresponding first group of sample data of the first thermal resistance and second group of sample data, institute are determined in sample database
Stating every group of sample data in sample database includes the heat of a duration and the radiator after running the duration
Resistance, first thermal resistance are located at the third in the second thermal resistance and second group of sample data in first group of sample data
Between thermal resistance；
According to first thermal resistance, first group of sample data and second group of sample data, the heat dissipation is determined
The chocking-up degree of device.
It is described according to first thermal resistance, first group of sample data and described in a kind of possible embodiment
Second group of sample data, determines the chocking-up degree of the radiator, comprising:
Obtain the first difference of second thermal resistance and the third thermal resistance；
Obtain the of the first duration in first group of sample data and the second duration in second sample data
Two differences；
The chocking-up degree is determined according to first difference and second difference.
It is described according to first temperature, preset temperature and the converter plant in alternatively possible embodiment
Power loss, determine the first thermal resistance, comprising:
Obtain the third difference of first temperature and the preset temperature；
The ratio of the third difference and the power loss of the converter plant is determined as first thermal resistance.
It is described according to first temperature, preset temperature and the converter plant in alternatively possible embodiment
Power loss, before determining the first thermal resistance, further includes:
According to the first electric current of insulated gate bipolar transistor IGBT, the first fitting parameter, second in the converter plant
Temperature, the first characterisitic parameter determine the first power loss of the IGBT；
According to the second electric current of the diode in the converter plant, the second fitting parameter, second temperature, the second characteristic ginseng
Number, determines the second power loss of the diode；
By the sum of first power loss and second power loss, it is determined as the power damage of the converter plant
Consumption.
Thermal resistance in alternatively possible embodiment, in the sample database in every two groups of adjacent sample datas
Between difference it is identical.
Second aspect, the embodiment of the present invention provide a kind of radiator chocking-up degree determining device of converter plant, comprising:
Obtain module, the first determining module, the second determining module and third determining module, wherein
The acquisition module is used for, and obtains the first temperature of the radiator；
First determining module is used for, and is damaged according to the power of first temperature, preset temperature and the converter plant
Consumption, determines the first thermal resistance；
Second determining module is used for, and the corresponding first group of sample number of first thermal resistance is determined in sample database
According to second group of sample data, every group of sample data in the sample database includes that a duration and the radiator exist
The thermal resistance after the duration is run, first thermal resistance is located at the second thermal resistance and described in first group of sample data
Between third thermal resistance in two groups of sample datas；
The third determining module is used for, according to first thermal resistance, first group of sample data and second group described
Sample data determines the chocking-up degree of the radiator.
In a kind of possible embodiment, the third determining module is specifically used for:
Obtain the first difference of second thermal resistance and the third thermal resistance；
Obtain the of the first duration in first group of sample data and the second duration in second sample data
Two differences；
The chocking-up degree is determined according to first difference and second difference.
In alternatively possible embodiment, first determining module is specifically used for:
Obtain the third difference of first temperature and the preset temperature；
The ratio of the third difference and the power loss of the converter plant is determined as first thermal resistance.
In alternatively possible embodiment, described device further includes the 4th determining module, the 5th determining module, the 6th
Determining module, wherein
4th determining module is used for, according to the first electricity of insulated gate bipolar transistor IGBT in the converter plant
Stream, the first fitting parameter, second temperature, the first characterisitic parameter, determine the first power loss of the IGBT；
5th determining module is used for, according to the second electric current of the sustained diode iode in the converter plant,
Two fitting parameters, second temperature, the second characterisitic parameter determine the second power loss of the diode；
6th determining module is used for, and the sum of first power loss and second power loss are determined as
The power loss of the converter plant.
Thermal resistance in alternatively possible embodiment, in the sample database in every two groups of adjacent sample datas
Between difference it is identical.
The third aspect, the radiator chocking-up degree that the embodiment of the present invention provides a kind of converter plant determine equipment, comprising: place
Device is managed, the processor is coupled with memory；
The memory is used for, and stores computer program；
The processor is used for, and executes the computer program stored in the memory, so that the terminal device is held
The above-mentioned described in any item methods of first aspect of row.
Fourth aspect, the embodiment of the present invention provide a kind of readable storage medium storing program for executing, including program or instruction, when described program or
When instruction is run on computers, the method as described in above-mentioned first aspect any one is performed.
Radiator chocking-up degree provided by the present application determines method and device, when it needs to be determined that radiator chocking-up degree
When, according to the first temperature of radiator, the power loss of preset temperature and converter plant, the first thermal resistance is determined, in sample data
The corresponding first group of sample data of the first thermal resistance and second group of sample data are determined in library, according to the first thermal resistance, first group of sample
Data and second group of sample data, determine the chocking-up degree of radiator.In above process, the thermal resistance of radiator and radiator
There is certain corresponding relationship between chocking-up degree, the multiple groups sample data in sample database can really reflect thermal resistance and
Corresponding relationship between chocking-up degree.It therefore, can be accurate according to the sample data in the thermal resistance and sample database of radiator
Determination obtain the chocking-up degree of radiator, and then improve the accuracy for determining the obtained chocking-up degree of radiator.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of radiator provided in an embodiment of the present invention；
Fig. 2 is that radiator chocking-up degree provided in an embodiment of the present invention determines method schematic diagram；
Fig. 3 is the circuit diagram of heat radiator thermal resistance provided in an embodiment of the present invention；
Fig. 4 is the power loss calculating process schematic diagram of converter plant provided in an embodiment of the present invention；
Fig. 5 is the radiator chocking-up degree determining device schematic diagram one of converter plant provided in an embodiment of the present invention；
Fig. 6 is the radiator chocking-up degree determining device schematic diagram two of converter plant provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Rail traffic vehicles have the characteristics that safety, comfortable, energy conservation and environmental protection, are the primary selections of people's trip.Unsteady flow dress
Set be rail traffic vehicles core apparatus, radiator be converter plant heat dissipation important component, wherein the structure of radiator is shown
It is intended to as shown in Figure 1.
Fig. 1 be radiator provided in an embodiment of the present invention structural schematic diagram, referring to Figure 1, including heat-radiating substrate 1, dissipate
Hot fin 2, air-cooled channel 3 and blower 4.
The heat that converter plant generates is diffused on radiating fin 2 by heat-radiating substrate 1, and blower 4 generates strong convection air, is made
The heat obtained on radiating fin 2 is diffused into air by air-cooled channel 3.
In practice, it is easy to stick a large amount of dusts on the radiating fin 2 of radiator in converter plant, causes radiator stifled
Plug influences the effect that heat diffusion is carried out to converter plant.In order to accurately determine that radiator chocking-up degree, the application provide one
The radiator chocking-up degree of kind converter plant determines method, specific embodiment shown in Figure 2.
Fig. 2 is that radiator chocking-up degree provided in an embodiment of the present invention determines method schematic diagram, refers to Fig. 2, comprising:
S201: the first temperature of radiator is obtained.
The executing subject of the embodiment of the present invention can be radiator chocking-up degree determining device.Optionally, the radiator is stifled
Plug degree determining device can be by software realization, can also being implemented in combination with by software and hardware.
When it needs to be determined that technical solution shown in embodiment shown in Fig. 2 can be executed when chocking-up degree, alternatively, according to
In certain preset execution period, periodically execute technical solution shown in embodiment shown in Fig. 2.
Optionally, the preset execution period is a hour, two hours etc..
It is provided with temperature sensor on radiator, the first temperature of radiator can be obtained by temperature sensor.
Optionally, multiple temperature sensors can be set on the different location of radiator, pass through multiple temperature sensing
The temperature of device acquisition radiator different location.
Optionally, when the number of temperature sensor is multiple, the multiple temperature that multiple temperature sensor can be obtained
First temperature of the average value of degree as radiator.
S202: according to the power loss of the first temperature, preset temperature and converter plant, the first thermal resistance is determined.
Optionally, preset temperature is chocking-up degree when being zero, passes through the radiator that the temperature sensor on radiator obtains
Temperature.
It should be noted that can be by the function of the absolute value and converter plant of the first temperature and the third difference of preset temperature
The ratio of rate loss is determined as the first thermal resistance.
Such as: assuming that the first temperature is A, preset temperature B, third difference is C, and the power loss of converter plant is D, the
One thermal resistance is R.Then there are following corresponding relationships between A, B, C, D and R:
Optionally, thermal resistance changes with the influence of many factors, these factors include radiator temperature measurement point, radiator
Material, the radiator type of cooling, coolant flow is to quantity, size and layout with flow velocity, power device etc., the circuit of thermal resistance
Figure is as shown in figure 3, specifically refer to Fig. 3.
Fig. 3 is the circuit diagram of heat radiator thermal resistance provided in an embodiment of the present invention, refers to Fig. 3, the thermal resistance of radiator in figure
RtotIt include: the heat transfer thermal resistance R of heat-radiating substrateth,d, radiating fin heat transfer thermal resistance Rth,fin, heat-radiating substrate and convected air
Convective heat transfer thermal resistance R between layerth,a, convective heat transfer thermal resistance R between radiating fin and convected air layerth,a。
In practical applications, staff has found, a large amount of dust can be attached on radiating fin 2, blocks radiator,
Lead to the thermal resistance R of the thermal resistance radiator of radiatortotIncrease.
S203: the corresponding first group of sample data of the first thermal resistance and second group of sample data are determined in sample database.
Wherein, every group of sample data in sample database includes a duration and radiator after running the duration
Thermal resistance, the first thermal resistance be located at the third thermal resistance in the second thermal resistance and second group of sample data in first group of sample data it
Between.
It should be noted that the difference of the thermal resistance in every two groups of adjacent sample data is identical in sample database.
Optionally, sample database can pre-establish, and be stored in the pre- of radiator chocking-up degree determining device
If in storage region.
In the following, doing the explanation for carrying out a step to the establishment process of sample database.
When the chocking-up degree of radiator is zero, that is, the radiator operation duration t for being zero in chocking-up degree0When=0, lead to
The temperature of excess temperature sensor acquisition radiator at this time, according to the power loss of the temperature computation converter plant of radiator, and root
The thermal resistance R of radiator is obtained according to the power loss of ac equipment0。
T is run in radiator1When duration, the temperature of radiator at this time is acquired by temperature sensor, according to radiator
The power loss of temperature computation ac equipment, and according to the thermal resistance R of the power loss of ac equipment acquisition radiator1。
And so on, the thermal resistance of multiple rail traffic vehicles operation durations and radiator is obtained, by the operation duration
Sample database is constituted with the thermal resistance, sample database is as shown in table 1.
Table 1
| Sample data | Thermal resistance (K/W) | Duration (h) | Duration (h) | Duration (h) |
| First group of sample data | R0 | t0 | t′0 | t″0 |
| Second group of sample data | R1 | t1 | t′1 | t″1 |
| … | … | … | … | … |
It should be noted that the h in table 1 represents chronomere: hour, K/W are the thermal resistance unit of radiator: Kelvin/
Watt.
The corresponding first group of sample data of the first thermal resistance and second group of sample data are determined in the following, illustrating.
Illustratively, it is assumed that sample database is as shown in table 2.
Table 2
| Sample data | Thermal resistance (K/W) | Duration (h) | Duration (h) | Duration (h) |
| First group of sample data | 0.6 | 0.15 | 0.2 | 0.45 |
| Second group of sample data | 0.8 | 0.4 | 0.7 | 1.1 |
| … | … | … | … | … |
Assuming that the first thermal resistance value be 0.71, due to 0.71 thermal resistance (0.6) and sample data 2 of sample data 1 thermal resistance
(0.8) between, hence, it can be determined that the corresponding first group of sample data of the first thermal resistance and second group of sample data are respectively sample
Data 1 and sample data 2.
S204: according to first thermal resistance, first group of sample data and second group of sample data, the blocking of radiator is determined
Degree.
According to thermal resistance range in two adjacent groups data every in sample database, the second of thermal resistance range and chocking-up degree is established
Database.
First difference of the third thermal resistance of the second thermal resistance and second group of sample data of first group of sample data with first group
Second difference ratio of the second duration in the first duration and the second sample data in sample data is slope.Different slopes
Corresponding different chocking-up degree.
Illustratively, different slopes correspond to different chocking-up degrees corresponding relationship it is as shown in table 3.
Table 3
It should be noted that the k in table 31, k '1Deng indicate slope, unit K/W.h, 5% ..., 100% indicate blocking journey
Degree.
Illustratively, it is assumed that the second database is as shown in table 4.
Table 4
| Thermal resistance range | 50% | 55% |
| 0.6-0.8 | 0.6 | 0.8 |
| … | … |
For example, according to table 2 and table 4, the first thermal resistance value is 0.71, in the second thermal resistance 0.6 of first group of sample data and the
Between the third thermal resistance 0.8 of two groups of sample datas, and the first difference is 0.8-0.6=0.2；First in first group of sample data
Duration 0.15, the second duration 0.4 in the second sample data, then the second difference is 0.4-0.15=0.25.First difference 0.2 with
The ratio of second difference 0.25 is 0.2/0.25=0.8, i.e., slope is 0.8, that is to say, that slope corresponding blocking journey when being 0.8
Degree is 50%.
Radiator chocking-up degree provided by the present application determines method, when it needs to be determined that radiator chocking-up degree when, according to
The first temperature, the power loss of preset temperature and converter plant of radiator, determine the first thermal resistance, determine in sample database
The corresponding first group of sample data of first thermal resistance and second group of sample data, according to the first thermal resistance, first group of sample data and
Two groups of sample datas, determine the chocking-up degree of radiator.In above process, the chocking-up degree of the thermal resistance of radiator and radiator
Between there is certain corresponding relationship, the multiple groups sample data in sample database can really reflect thermal resistance and chocking-up degree
Between corresponding relationship.It therefore, can be accurately determining according to the sample data in the thermal resistance and sample database of radiator
To the chocking-up degree of radiator, and then improve the accuracy for determining the chocking-up degree of obtained radiator.
During the chocking-up degree of above-mentioned determining radiator, without determining the blocking of radiator by artificial observation
Degree, this not only saves human cost, also improves the efficiency of determining radiator chocking-up degree.Further, due to the application
Shown in the chocking-up degree of radiator determine method, eliminate the reliance on artificial observation, therefore, radiator shown in the application it is stifled
Plug degree determines that method can be adapted for the radiator of any structure, so that the chocking-up degree of radiator shown in the application determines
Method has versatility.
In addition, the temperature and electric current of radiator are obtained in real time by temperature sensor and current sensor, by the temperature
With electric current after accurate operation, the chocking-up degree of radiator can be obtained in real time, solved in the prior art only in radiator
It just can be carried out the problem of real-time difference caused by chocking-up degree detects when out of service.
Based on any of the above embodiments, in the following, making to the power loss calculating process of converter plant further
Illustrate, specific reference to Fig. 4.
Fig. 4 is the power loss calculating process schematic diagram of converter plant provided in an embodiment of the present invention, referring to fig. 4, comprising:
S401: calculating temperature is TkWhen IGBT on-state lossAverage switch loss
Calculating temperature is TkWhen Diode on-state lossAverage turn-off power loss
It should be noted that TkRepresent second temperature, IcIndicate the first electric current (i.e. the on state current of IGBT), IfIndicate the
Two electric currents (i.e. the cut-off current of Diode).
Calculating temperature is TkWhen IGBT on-state loss
The two characteristic curve V of IGBT under the conditions of 25 DEG C and 125 DEG C provided according to the product manual of IGBTce-Ic, benefit
With linear interpolation method, show that temperature is TkWhen IGBTCharacteristic curve.It willOn characteristic curve it is multiple not
Same pointCross, ordinate point be multiplied, obtain the characteristic curve of IGBTThat is:
In formula,It is T for temperaturekWhen IGBT on-state voltage drop, g indicate multiplying.
Using function-fitting method, Function Fitting is carried out to formula (1), is obtainedAbout Ic3 functions it is multinomial
Formula:
In formula, ak1、ak2、ak3、ak4Indicate the first fitting parameter.
Calculating temperature is TkWhen IGBT average switch loss
According to the product manual of IGBT provide provided under the conditions of 25 DEG C and 125 DEG C characterisitic parameter (including first spy
Property parameter: Eon-Ic、Eoff-Ic), using linear interpolation method, acquisition temperature is TkWhenRespectively
It is right3 Function Fittings are carried out, are obtained:
In formula,To be I in the first electric currentc, temperature TkWhen IGBT open, turn off energy
Loss, mk1、mk2、mk3、mk4、nk1、nk2、nk3、nk4For fitting parameter.
Formula (3) and formula (4) are substituted into formula (5), calculate the average switch loss of IGBTIt is counted
Calculate formula are as follows:
In formula, fswFor switching frequency, π is nature pi.
Calculating temperature is TkWhen Diode on-state loss
The two characteristic curve V of Diode under the conditions of 25 DEG C and 125 DEG C provided according to the product manual of Diodef-If,
Using linear interpolation method, show that temperature is TkWhen DiodeCharacteristic curve.It willIt is more on characteristic curve
A differenceCross, ordinate point be multiplied, obtain the characteristic curve of DiodeThat is:
In formula,It is T for temperaturekWhen Diode on-state voltage drop.
Using function-fitting method, Function Fitting is carried out to formula (6), is obtainedAbout If3 functions it is multinomial
Formula:
In formula, bk1、bk2、bk3、bk4Indicate the second fitting parameter.
Calculating temperature is TkWhen Diod average turn-off power loss
Characterisitic parameter (the i.e. indicatrix provided under the conditions of 25 DEG C and 125 DEG C provided according to the product manual of Diode
Err-If), using linear interpolation method, acquisition temperature is TkWhenIndicatrix, then utilize 3 Function Fittings
Method obtains:
In formula, ok1、ok2、ok3、ok4For fitting parameter,It is T for temperaturekWhen Diode shutdown energy loss, will be public
Formula (8) substitutes into formula (9), obtains the average turn-off power loss of DiodeIts calculation formula are as follows:
S402: acquisition temperature is TkWhen IGBT the first power lossWith the second power loss of Diode
It optionally, can be T by following feasible implementation temperaturekWhen IGBT the first power loss
Formula (2) are obtainedIt is obtained with formula (5)It substitutes into formula (10), obtains
Obtain the first power loss of IGBTIts calculation formula is:
The first power loss of IGBTInclude quiescent dissipation, switching loss and drive loss, wherein quiet
State loss is divided into on-state loss and off-state loss, switching loss are divided into turn-on consumption and turn-off power loss.The off-state loss of IGBT exists
Accounting very little, ignores in first power loss.
Optionally, it is lost using average switchInstead of IGBT turn-on consumption and turn-off power loss and,
Calculate the first power loss of IGBT
Optionally, the second power loss of Diode can be determined by following feasible implementation
It is obtained using formula (7)It is obtained with formula (9)It substitutes into formula (11)
In, obtain the second power loss of DiodeIts calculation formula is:
It should be noted that the second power loss of DiodeInclude quiescent dissipation, switching loss and drive
Dynamic loss, wherein quiescent dissipation is divided into on-state loss and off-state loss, switching loss are divided into turn-on consumption and turn-off power loss.
The accounting very little in the second power loss is lost in the turn-on consumption and off-state of Diode, ignores.
Optionally, using average turn-off power lossInstead of the turn-off power loss of Diode, the of Diode is calculated
Two power losses.
S403: calculating temperature is TkWhen converter plant power loss meter
Formula (10) are obtainedIt is obtained with formula (11)It substitutes into formula (12), obtains
Obtain the power loss of converter plantIts calculation formula is as follows:
In the following, technical solution shown in above method embodiment is described in detail by specific example.
Illustratively, it is assumed that sample database is as shown in Table 2 above.
Assuming that acquiring the first temperature of radiator at this time by temperature sensor after rail traffic vehicles operation a period of time
For 333K (K indicates temperature unit Kelvin), preset temperature 303K；When temperature is 333K, current sensor obtains the first electricity
Stream and the second electric current are calculated for 333K, the first electric current and the second electric current using formula (1)-(12) according to the first temperature
Ac equipment power loss Ptot(333K)It is 50 watts；Then first thermal resistance are as follows:
When the first thermal resistance 0.6, start timing, when thermal resistance value reaches the third thermal resistance 0.8 of second group of sample data,
Assuming that time 0.3 hour of rail vehicle experience, terminate timing, the slope calculated at this time is (0.8-0.6)/0.3=0.67, root
According to table 4, slope 0.67 is located at 0.6-0.8, therefore, in converter plant at this time the chocking-up degree of radiator be 50%-55% it
Between.
Fig. 5 is the radiator chocking-up degree determining device schematic diagram one of converter plant provided in an embodiment of the present invention.It please join
See Fig. 5, the apparatus may include obtaining module 11, the first determining module 12, the second determining module 13 and third determining module 14,
Wherein,
The acquisition module 11 is used for, and obtains the first temperature of the radiator；
First determining module 12 is used for, according to first temperature, the power of preset temperature and the converter plant
Loss, determines the first thermal resistance；
Second determining module 13 is used for, and the corresponding first group of sample of first thermal resistance is determined in sample database
Data and second group of sample data, every group of sample data in the sample database include a duration and the radiator
Thermal resistance after running the duration, first thermal resistance are located at the second thermal resistance in first group of sample data and described
Between third thermal resistance in second group of sample data；
The third determining module 14 is used for, according to first thermal resistance, first group of sample data and described second
Group sample data, determines the chocking-up degree of the radiator.
The radiator chocking-up degree determining device of converter plant provided in an embodiment of the present invention can execute above method reality
Technical solution shown in example is applied, realization principle and beneficial effect are similar, are no longer repeated herein.
In a kind of possible embodiment, the third determining module 14 is specifically used for:
Obtain the first difference of second thermal resistance and the third thermal resistance；
Obtain the of the first duration in first group of sample data and the second duration in second sample data
Two differences；
The chocking-up degree is determined according to first difference and second difference.
In alternatively possible embodiment, first determining module is specifically used for:
Obtain the third difference of first temperature and the preset temperature；
The ratio of the third difference and the power loss of the converter plant is determined as first thermal resistance.
Fig. 6 is the radiator chocking-up degree determining device schematic diagram two of converter plant provided in an embodiment of the present invention.In Fig. 5
On the basis of illustrated embodiment, Fig. 6 is referred to, described device further includes the 4th determining module 15, the 5th determining module the 16, the 6th
Determining module 17, wherein
4th determining module 15 is used for, according to first of insulated gate bipolar transistor IGBT in the converter plant
Electric current, the first fitting parameter, second temperature, the first characterisitic parameter determine the first power loss of the IGBT；
5th determining module 16 is used for, according to the second electric current of the sustained diode iode in the converter plant,
Second fitting parameter, second temperature, the second characterisitic parameter determine the second power loss of the diode；
6th determining module 17 is used for, and the sum of first power loss and second power loss determine
For the power loss of the converter plant.
In a kind of possible embodiment, thermal resistance in the sample database in every two groups of adjacent sample datas it
Between difference it is identical.
The radiator chocking-up degree determining device of converter plant provided in an embodiment of the present invention can execute above method reality
Technical solution shown in example is applied, realization principle and beneficial effect are similar, are no longer repeated herein.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the embodiment of the present invention, rather than to it
Limitation；Although the embodiment of the present invention is described in detail referring to foregoing embodiments, those skilled in the art
It is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, either to part of or
All technical features are equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution this hair
The range of bright example scheme.
Claims (10)
1. a kind of radiator chocking-up degree of converter plant determines method, which is characterized in that the described method includes:
Obtain the first temperature of the radiator；
According to first temperature, the power loss of preset temperature and the converter plant, the first thermal resistance is determined；
The corresponding first group of sample data of the first thermal resistance and second group of sample data, the sample are determined in sample database
Every group of sample data in database includes the thermal resistance of a duration and the radiator after running the duration, institute
State the third thermal resistance in the second thermal resistance and second group of sample data that the first thermal resistance is located in first group of sample data
Between；
According to first thermal resistance, first group of sample data and second group of sample data, the radiator is determined
Chocking-up degree.
2. the method according to claim 1, wherein described according to first thermal resistance, first group of sample
Data and second group of sample data, determine the chocking-up degree of the radiator, comprising:
Obtain the first difference of second thermal resistance and the third thermal resistance；
Obtain the first duration in first group of sample data and the second duration in second sample data second is poor
Value；
The chocking-up degree is determined according to first difference and second difference.
3. the method according to right 1 or 2, which is characterized in that described according to first temperature, preset temperature and the change
The power loss for flowing device, determines the first thermal resistance, comprising:
Obtain the third difference of first temperature and the preset temperature；
The ratio of the third difference and the power loss of the converter plant is determined as first thermal resistance.
4. method according to claim 1 or 2, which is characterized in that described according to first temperature, preset temperature and institute
The power loss for stating converter plant, before determining the first thermal resistance, further includes:
According to the first electric current of insulated gate bipolar transistor IGBT in the converter plant, the first fitting parameter, second temperature,
First characterisitic parameter determines the first power loss of the IGBT；
According to the second electric current, the second fitting parameter, second temperature, second of the sustained diode iode in the converter plant
Characterisitic parameter determines the second power loss of the diode；
By the sum of first power loss and second power loss, it is determined as the power loss of the converter plant.
5. method according to claim 1 or 2, which is characterized in that every two groups of adjacent samples in the sample database
The difference between thermal resistance in data is identical.
6. a kind of radiator chocking-up degree determining device of converter plant, which is characterized in that including obtaining module, the first determining mould
Block, the second determining module and third determining module, wherein
The acquisition module is used for, and obtains the first temperature of the radiator；
First determining module is used for, according to first temperature, the power loss of preset temperature and the converter plant, really
Fixed first thermal resistance；
Second determining module is used for, determined in sample database the corresponding first group of sample data of first thermal resistance and
Second group of sample data, every group of sample data in the sample database include that a duration and the radiator are being run
Thermal resistance after the duration, first thermal resistance are located at the second thermal resistance in first group of sample data and second group described
Between third thermal resistance in sample data；
The third determining module is used for, according to first thermal resistance, first group of sample data and second group of sample
Data determine the chocking-up degree of the radiator.
7. device according to claim 6, which is characterized in that the third determining module is specifically used for:
Obtain the first difference of second thermal resistance and the third thermal resistance；
Obtain the first duration in first group of sample data and the second duration in second sample data second is poor
Value；
The chocking-up degree is determined according to first difference and second difference.
8. the device according to right 6 or 7, which is characterized in that first determining module is specifically used for:
Obtain the third difference of first temperature and the preset temperature；
The ratio of the third difference and the power loss of the converter plant is determined as first thermal resistance.
9. device according to claim 6 or 7, which is characterized in that described device further include the 4th determining module, the 5th really
Cover half block, the 6th determining module, wherein
4th determining module is used for, according to the first electric current of insulated gate bipolar transistor IGBT in the converter plant,
First fitting parameter, second temperature, the first characterisitic parameter determine the first power loss of the IGBT；
5th determining module is used for, and is intended according to the second electric current of the sustained diode iode in the converter plant, second
Parameter, second temperature, the second characterisitic parameter are closed, determines the second power loss of the diode；
6th determining module is used for, and the sum of first power loss and second power loss are determined as described
The power loss of converter plant.
10. device according to claim 6 or 7, which is characterized in that every two groups of adjacent samples in the sample database
The difference between thermal resistance in data is identical.
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| CN201811128323.3A CN109600021B (en) | 2018-09-27 | 2018-09-27 | Method and device for determining blockage degree of radiator of converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128323.3A CN109600021B (en) | 2018-09-27 | 2018-09-27 | Method and device for determining blockage degree of radiator of converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567739A (en) * | 2019-07-16 | 2019-12-13 | 北京交通大学 | Method and device for rapidly detecting heat dissipation state of radiator |
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| CN102192845A (en) * | 2010-03-18 | 2011-09-21 | 施耐德东芝换流器欧洲公司 | Method for diagnosing heat radiation system |
| CN107590295A (en) * | 2016-07-08 | 2018-01-16 | 台达电子企业管理（上海）有限公司 | Method and device for the cooling system condition evaluation of power model |
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| CN110567739A (en) * | 2019-07-16 | 2019-12-13 | 北京交通大学 | Method and device for rapidly detecting heat dissipation state of radiator |
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