CN109900372A - Buses of insulation tubes connector conductor temperature on-line monitoring method - Google Patents
Buses of insulation tubes connector conductor temperature on-line monitoring method Download PDFInfo
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- CN109900372A CN109900372A CN201910300299.5A CN201910300299A CN109900372A CN 109900372 A CN109900372 A CN 109900372A CN 201910300299 A CN201910300299 A CN 201910300299A CN 109900372 A CN109900372 A CN 109900372A
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Abstract
The present invention relates to buses of insulation tubes connector conductor temperature on-line monitoring methods comprising arrangement temperature measuring point, the axial Up Highway UHW connector conductor temperature of foundation and each temperature measuring point correspond to inverting relationship, radial temperature inverting and the axial temperature inverting of conductor temperature.This method is simple and easy, can largely promote buses of insulation tubes temperature monitoring system precision, play certain effect in buses of insulation tubes maintenance work.
Description
Technical field
The invention belongs to buses of insulation tubes O&M technical fields, and in particular to buses of insulation tubes connector conductor temperature is supervised online
Survey method.
Background technique
Compared to the various current carrying bus of tradition, buses of insulation tubes is with current-carrying capacity is larger, kelvin effect is lower, power loss
It smaller, the advantages that electricity utilization rate is higher, finds broad application in places such as substations.Due to product quality, O&M etc. because
The presence of element, the labyrinth and junction contacts resistance of connector causes its heating problem serious, and connector temperature is excessively high to be accelerated absolutely
Edge heat ageing influences the thermal life of insulation.Therefore, carrying out on-line monitoring to buses of insulation tubes transition joint conductor temperature has weight
Want meaning.
In terms of buses of insulation tubes associated temperature detection technique, the means such as infrared imaging, ultraviolet imagery, ultrasound are applied to inspection
Insulating inner damage, weld defect etc. are surveyed, but not yet realizes long-term on-line checking.Meanwhile the temperature sensor docking of flush type
Head internal structure produces bigger effect, or even will increase conductor joint heating.
In addition, existing measurement means be both easy the interference by external environment or be easy by buses of insulation tubes connector
The influence of structure, therefore lead to measurement data inaccuracy and operate complicated.
Summary of the invention
It is an object of the invention to overcome problems of the prior art, a kind of buses of insulation tubes connector conductor temperature is provided
On-line monitoring method is spent, busbar joint conductor temperature is obtained by detectable bus bulk skin temperature inverting, it is convenient to operate,
Safely and effectively.
Buses of insulation tubes connector conductor temperature on-line monitoring method provided by the present invention includes
Step 1: multiple temperature measuring points are set on bus bulk epidermis, and multiple temperature measuring points are axially distributed and are respectively positioned on
The temperature measuring point of the side of busbar joint, distalmost end is no more than 3 meters apart from busbar joint, and the temperature measuring point of most proximal end is apart from busbar joint
No less than 0.1 meter, each temperature measuring point is equipped with heat insulation protection cover outside；
Step 2: axial Up Highway UHW connector conductor temperature being established using Function Fitting method and each temperature measuring point corresponds to conductor temperature
The inverting relationship of degree；
Step 3: establishing Transient Thermal Circuit model, using temperature radial inversion algorithm, inverting obtains each temperature measuring point and corresponds to conductor
Temperature；Wherein, the thermal resistance of the Transient Thermal Circuit model is made of the insulating layer thermal resistance and outer layer thermal resistance of buses of insulation tubes ontology；
Step 4: each temperature measuring point obtained by step 3 being corresponded into conductor temperature and is updated in step 2 gained inverting relationship, inverting obtains
To busbar joint conductor temperature.
Further, in step 1, the temperature sensor of each temperature measuring point is respectively provided with one or more, each described
Temperature sensor is respectively positioned in heat insulation protection cover.
Further, in step 1, the quantity of the temperature measuring point is 2~6.
Further, in step 1, the heat insulation protection cover with a thickness of 1mm~50mm.
Further, in step 2, the axial Up Highway UHW connector conductor temperature of the foundation and each temperature measuring point correspond to conductor temperature
Inverting relationship, be the Analysis of Transient Thermal Field carried out according to buses of insulation tubes Temperature Field Simulation model under multiple single step currents loads
Emulation, then extracts the data set of conductor temperature at connector temperature and each temperature measuring point, and is obtained between the two by Function Fitting
Axial inverting relationship.
Further, described to establish Transient Thermal Circuit model in step 3, it is to be calculated according to the layered structure of buses of insulation tubes
Each layer thermal resistance and thermal capacitance are obtained, then the Transient Thermal Circuit model of buses of insulation tubes ontology is established in layering.
Further, in step 3, the radial inversion algorithm adoption status equation solution.
Offer buses of insulation tubes connector conductor temperature on-line monitoring method of the present invention includes arrangement temperature measuring point, establishes axis
Inverting relationship, radial temperature inverting and the axial temperature that upward busbar joint conductor temperature and each temperature measuring point correspond to conductor temperature are anti-
Drill four steps.
When establishing axial upper inverting relationship, the structure for being primarily based on buses of insulation tubes ontology and connector establishes insulation tube mother
Then line Temperature Field Simulation model carries out the transient-state temperature under multiple single step current loads according to rated current and sampling period
Field emulation, obtains the data set of conductor temperature at connector conductor temperature and each temperature measuring point, establishes bus finally by Function Fitting
Connector conductor temperature and each temperature measuring point correspond to the axial inverting relationship of conductor temperature.
In radial temperature inverting, according to buses of insulation tubes structure, the Transient Thermal Circuit of buses of insulation tubes ontology is established in layering
Model.Buses of insulation tubes structure is usually made of copper pipe conductor, insulating layer, metal screen layer and the outer layer of hollow, wherein copper pipe
Conductor and metal screen layer thermal conductivity are high, can ignore its thermal resistance.And for the air inside pipe mother, due to wall temperature in conductor
Spend equal, thermal resistance also can be ignored, while atmospheric density is extremely low, therefore thermal capacitance can also be ignored, and therefore, establish Transient Thermal Circuit
When model, thermal resistance is only with insulating layer thermal resistance and outer layer thermal resistance composition is considered, thermal capacitance is only with consideration insulating layer and metal screen layer.By
This is conducive to rapid computations and quickly aobvious as it can be seen that the Transient Thermal Circuit model established in radial temperature inverting of the present invention is simple
Result is shown.
Insulating layer and outer layer of the present invention may include single or multi-layer structure, according to the reality of buses of insulation tubes ontology
Demand and set, the outer layer be metal screen layer with the general name of external coating.
Beneficial effects of the present invention:
Buses of insulation tubes connector conductor temperature on-line monitoring method of the present invention outside temperature measuring point by being arranged heat-insulated guarantor
Influence of the ambient enviroment disturbance to thermometric accuracy can be greatly reduced in shield, be obviously improved buses of insulation tubes system for detecting temperature
Precision.In order to further increase thermometric accuracy, multiple temperature sensors can also be arranged in the present invention on each temperature measuring point
It is verified and is averaged.
Buses of insulation tubes connector conductor temperature on-line monitoring method of the present invention does not need to measure in connector outer layer,
Troublesome operation and operation caused by avoiding because of joint structure complexity can be convenient by the way that temperature measuring point is arranged on bus bulk
Inverting obtains busbar joint conductor temperature.
Buses of insulation tubes connector conductor temperature on-line monitoring method of the present invention is based on the bus bulk epidermis temperature measured
The electric current that degree and bus pass through, energy inverting obtain busbar joint conductor temperature, and this method can realize buses of insulation tubes connector conductor
The long-term on-line monitoring of temperature.Inverting of the present invention includes radial inversion and axial inverting, when carrying out radial inversion, is established
Transient Thermal Circuit model almost do not have to consider pipe mother in air, copper pipe conductor and metal screen layer thermal resistance, while also do not have to examine
Consider the influence of flow of external air, gained thermal circuit model is very simple, greatly reduces calculation amount, improves calculating speed；Together
When carrying out inverting, use state equation solution can be further improved calculating speed.
Buses of insulation tubes connector conductor temperature on-line monitoring method precision of the present invention is high, it is easy to operate, be suitable for pushing away
It is wide to use.
Detailed description of the invention
Fig. 1 is the physical model of buses of insulation tubes connector conductor temperature inverting described in the embodiment of the present invention 1；
Fig. 2 is one-dimensional Transient Thermal Circuit model described in the embodiment of the present invention 1；
Fig. 3 be in the embodiment of the present invention 1 temperature measuring point cover heat insulation protection cover and when normal neighbouring cross-ventilation inverting value and
Temperature Field Simulation value；
Fig. 4 be in the embodiment of the present invention 1 temperature measuring point cover when heat insulation protection cover and neighbouring cross-ventilation are reinforced inverting value and
Temperature Field Simulation value；
Fig. 5 is inverting value when temperature measuring point does not cover heat insulation protection cover in the embodiment of the present invention 1 and neighbouring cross-ventilation is reinforced
With Temperature Field Simulation value.
Wherein: busbar joint 1；Thermal isolating panel 2；Bus bulk 3；Current transformer 4；Copper pipe conductor 5；A pairs of temperature measuring point
Answer conductor temperature T0a；Temperature measuring point b corresponds to conductor temperature T0b；Busbar joint conductor temperature Tj。
Specific embodiment
Below in conjunction with attached drawing, the technical solution in the specific embodiment of the invention is clearly and completely described.It is aobvious
So, described specific embodiment is only the specific embodiment of present invention a part, rather than whole specific implementations
Mode.Based on the specific embodiment of the invention, those of ordinary skill in the art are obtained without making creative work
The every other specific embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
The present embodiment is specifically described insulation so that voltage class is 10kV, rated current is the buses of insulation tubes of 1250A as an example
Tube bus connector conductor temperature on-line monitoring method.Wherein, busbar joint is welded type valve type anchor ear intermediate connection structure, is used
Live lapped insulation mode.
Step 1: arrangement temperature measuring point
Buses of insulation tubes connector conductor temperature inverting physical model as shown in Figure 1,1 side of busbar joint bus bulk 3
Epidermis is equipped with temperature measuring point a and temperature measuring point b, and wherein temperature measuring point a is 0.65 meter, temperature measuring point b and bus with busbar joint 1 at a distance from
The distance of connector 1 is 2.5 meters.Thermal insulation protection made from Ya Luofu thermal insulation material is coated with outside the temperature measuring point a and temperature measuring point b
Cover 2, the heat insulation protection cover 2 can be blocky or ring-type, the place temperature measuring point a and heat insulation protection cover 2 at temperature measuring point b
Thickness is 10mm.Three column type thermocouple temperature sensors are respectively provided on each temperature measuring point, three sensors are distributed around axis
And it is respectively positioned in heat insulation protection cover 2.For convenience of measurement buses of insulation tubes electric current, Current Mutual Inductance is also equipped on bus bulk 3
Device 4.
Step 2: establishing axial Up Highway UHW connector conductor temperature and each temperature measuring point corresponds to the inverting relationship of conductor temperature
Buses of insulation tubes ontology described in the present embodiment is divided into air, copper pipe conductor 5, #1 main insulating layer, # from inside to outside
2 main insulating layers, major insulation sealant, metal screen layer, outer sealing layers, external protection coating, each layer geometry and thermodynamic parameter such as table 1
It is shown.Buses of insulation tubes connector be divided into from inside to outside air, copper pipe conductor 5, copper anchor ear, stainless steel hoop, internal shield,
Inner sealant layer, main insulating layer, major insulation sealant, metal screen layer, outer sealing layers, external protection coating.Each layer geometry and thermodynamics
Parameter is as shown in table 2.
Table 1: buses of insulation tubes ontology geometry and thermodynamic parameter
Table 2: buses of insulation tubes connector geometry and thermodynamic parameter
Two-dimensional temperature field simulation model is established using ansys software based on the above layered structure and its relevant parameter,
Ratio in ansys software according to 1:1 establishes buses of insulation tubes model and structure is corresponded to parameter assignment in model.
Setting emulation boundary condition: calculating initial temperature is 25 DEG C, and bus bulk and joint surface and outside air have a common boundary
The 3rd class boundary condition of place's load, original ambient temperature take 25 DEG C, and convection transfer rate takes 8W/ (m2DEG C), conductor thermal power is pressed
Formula (2) calculates,
In formula (1): G1For thermal power densities；ρ is the resistivity of copper pipe conductor 5, ρ=1.75 × 10-8Ω·m；r1、r2Point
Not Wei copper pipe conductor 5 internal diameter, outer diameter, m；V1For the volume of copper pipe conductor 5.
Using 100A as interval, value carries out the Analysis of Transient Thermal Field emulation of single-order jump as load between 100A~1300A,
The calculating time of each single-order jump is 12h, and every 1min extracts the data of conductor temperature at one group of connector conductor temperature and temperature measuring point,
Contain 9360 groups of data in final temperature data sample.
It is fitted to obtain axial inverting relationship by linear function are as follows:
Tj=3.16T0a-2.15T0b+ 0.13 formula (2)
In formula (2): TjFor busbar joint conductor temperature；T0a、T0bRespectively temperature measuring point corresponds to conductor temperature.
Step 3: radial temperature inverting
In radial temperature inverting, the IEC60287 and IEC60853 single-core cable thermal resistance thermal capacitance recommended and heat source meter are utilized
Formula is calculated, according to buses of insulation tubes structure, the Transient Thermal Circuit model of buses of insulation tubes ontology is established in layering.Establish Transient Thermal Circuit mould
Type: outer sealing layers and external protection coating, #2 main insulating layer and major insulation seal layer material in buses of insulation tubes ontology in the present embodiment
It is identical, merge into one layer of processing.It is as shown in table 3 to acquire every layer of thermal resistance thermal capacitance parameter.It is as shown in Figure 2 according to parameter building in table 3
Transient Thermal Circuit model.
Table 3: each layer thermal resistance thermal capacitance parameter
The setting sampling period is Δ t, and load current is accordingly to be regarded as single Spline smoothing in each sampling period, and primary condition is by preceding
One moment determined, to be approximately a series of combination of continuous single step currents by load current.The list of Transient Thermal Circuit model
The general type of step response, adoption status equation solution, state equation is as follows:
In formula (3): A and B is real constant coefficient matrix；U is input column vector, U=[Ps,Ts]T, PsAnd TsIt is respectively internal
The thermal power and temperature measuring point surface temperature of conductor.In this formula,It differentiating for T to the time, T is state variable vector,
There is T=[T0,T1,T2]T, the temperature of each node, T are corresponded in thermal circuit model0I.e. temperature measuring point corresponds to conductor temperature.
Thermal circuit model in solution Fig. 2 obtains matrix A, B is respectively as follows:
Heat source PsIt is calculated by following formula:
Ps=I2× R formula (6)
In formula (6): I is bus current, A；R is conductor unit length resistance, Ω.
Making Laplace transform to formula (1) can obtain:
sT(s)-T(0-)=AT (s)+BU (s) formula (7)
In formula (7): T (0_) is each node temperature of initial time.
Arrangement can obtain:
T (s)=[sI-A]-1(T(0-)+BU (s)) formula (8)
Carrying out inverse Laplace transformation to above formula again can be obtained the time-domain expression of state variable, obtain T (t_), i.e., certain
Temperature vector [T of one temperature measuring point after a time interval0,T1,T2]。
In this specific embodiment, temperature data at each temperature measuring point is recorded as sampling period measurement using 1min and bus passes through
Electric current, radial inversion obtains temperature measuring point and corresponds to conductor temperature, is with preceding 4 minutes measurement data and inverting data shown in table 4
Example,
Table 4:1min~4min radial inversion data
| Time | Tsa | Tsb | T0a | T1a | T2a | T0b | T1b | T2b |
| 1min | 25.029 | 25.029 | 25.668 | 25.272 | 25.059 | 25.668 | 25.272 | 25.059 |
| 2min | 25.104 | 25.103 | 26.227 | 25.623 | 25.177 | 26.227 | 25.623 | 25.177 |
| 3min | 25.226 | 25.224 | 26.720 | 25.990 | 25.343 | 26.720 | 25.989 | 25.342 |
| 4min | 25.389 | 25.384 | 27.168 | 26.353 | 25.545 | 27.168 | 26.353 | 25.543 |
Wherein, TsaAnd TsbThe mean temperature of temperature sensor measurement at respectively temperature measuring point a and temperature measuring point b；T0a、T1aWith
T2aThe respectively temperature measuring point a thermal circuit model temperature that corresponds to each node, wherein T0aAs temperature measuring point a corresponds to conductor temperature；T0a、
T1bAnd T2bThe respectively temperature measuring point b thermal circuit model temperature that corresponds to each node, wherein T0bAs temperature measuring point b corresponds to conductor temperature.
Step 4: axial temperature inverting
The T obtained with step 30a、T0bFor known quantity, it is updated in step 2 gained inverting relational expression (2), inverting obtains mother
Wire terminal conductor temperature Tj.With preceding 4 minutes inverting data instances shown in table 5,
Table 5:1min~4min axial direction inverting data
| Time | T0a | T0b | Tj |
| 1min | 25.668 | 25.668 | 26.052 |
| 2min | 26.227 | 26.227 | 26.616 |
| 3min | 26.720 | 26.720 | 27.114 |
| 4min | 27.168 | 27.168 | 27.567 |
Wherein, T0aIt is respectively that temperature measuring point a and temperature measuring point b correspond to conductor temperature, T with T0bjFor the present embodiment buses of insulation tubes
Connector conductor temperature.Buses of insulation tubes connector conductor temperature on-line monitoring method of the present invention is easy to operate, operand is small, can
Quickly and accurately to obtain busbar joint conductor temperature, connector overheat is effectively prevent to generate security risk.
In order to verify the accuracy of the method for the invention, practical temperature rise is simulated with finite element Analysis of Transient Thermal Field simulation result
Test is input, the mother obtained using inversion method provided by the invention with the temperature measuring point temperature and current value extracted in emulation
Wire terminal conductor temperature is shown in curve in Fig. 3 " inverting value ", the connector transient-state temperature curve obtained using finite element temperature field emulation
Curve in Fig. 3 " simulation value " is seen, from figure 3, it can be seen that the method for the present invention accuracy with higher, can meet requirement of engineering.
For the effect for further illustrating heat insulation protection cover 2, the cross-ventilation coefficient of heat transfer is increased to
15W/(m2DEG C), simulated air convection current reinforce the case where.It repeats the above steps, it is " anti-to obtain curve in Fig. 4, Fig. 5
Drill value " and " simulation value ", wherein Fig. 5 simulation model removes heat insulation protection cover 2.It can be seen that when not covering heat insulation protection cover 2
As time increases, two curves are separated by increasingly remoter, and steady-state error has been more than 3 DEG C.It can be significantly by above-mentioned comparison
Find out, the presence of heat insulation protection cover 2 helps to reduce the influence of environmental change butt joint temperature retrieval.
Embodiment 2
The present embodiment is specifically described so that another voltage class is 10kV, rated current is the buses of insulation tubes of 1250A as an example
Buses of insulation tubes connector conductor temperature on-line monitoring method.Wherein, busbar joint is expansion joint type intermediate connection structure, using screen
Cover the section insulation mode of cylinder connection.
Step 1: arrangement temperature measuring point
In temperature measuring point a, temperature measuring point b and temperature measuring point c are arranged on the bus bulk epidermis of busbar joint side, wherein temperature measuring point
A is 0.65 meter at a distance from busbar joint, and temperature measuring point b is 1.2 meters at a distance from busbar joint, temperature measuring point c and busbar joint
Distance is 2.5 meters.Heat-insulated guarantor made from Ya Luofu thermal insulation material is coated with outside the temperature measuring point a, temperature measuring point b and temperature measuring point c
Shield, the heat insulation protection cover can be blocky or ring-type, thermal insulation protection at temperature measuring point a, temperature measuring point b and temperature measuring point c
The thickness of cover is 10mm.Three column type thermocouple temperature sensors are respectively provided on each temperature measuring point, three sensors are around axis
It is distributed and is respectively positioned in heat insulation protection cover.For convenience of measurement buses of insulation tubes electric current, it is mutual that electric current is also equipped on bus bulk
Sensor.
Step 2: establishing axial Up Highway UHW connector conductor temperature and each temperature measuring point corresponds to the inverting relationship of conductor temperature
Buses of insulation tubes ontology described in the present embodiment is divided into air, copper pipe conductor, #1 main insulating layer, #2 from inside to outside
Main insulating layer, major insulation sealant, metal screen layer, outer sealing layers, external protection coating, each layer geometry and thermodynamic parameter such as table 1
It is shown.The buses of insulation tubes transition joint structure of expansion joint type intermediate connection structure by busbar, be flexible coupling, bolt, stress cone, envelope
Close the composition such as copper sheet, equipotential ring, shielding cylinder.Each layer thermodynamic parameter is as shown in table 6.
Table 6: buses of insulation tubes connector geometry and thermodynamic parameter
Ratio based on the above layered structure in ansys software according to 1:1 establishes buses of insulation tubes model and by structure
Corresponding parameter assignment is in model.
Setting emulation boundary condition: calculating initial temperature is 25 DEG C, and bus bulk and joint surface and outside air have a common boundary
The 3rd class boundary condition of place's load, original ambient temperature take 25 DEG C, and convection transfer rate takes 8W/ (m2DEG C), conductor thermal power is pressed
Formula (1) calculates.
Using 100A as interval, value carries out the Analysis of Transient Thermal Field emulation of single-order jump as load between 100A~1300A,
The calculating time of each single-order jump is 12h, and every 1min extracts the data of conductor temperature at one group of connector conductor temperature and temperature measuring point,
Contain 9360 groups of data in final temperature data sample.
It is fitted to obtain axial inverting relationship by linear function are as follows:
Tj=-3.01T0a+4.11T0b+0.143T0c- 6.03 formulas (9)
In formula (9): TjFor busbar joint conductor temperature；T0a、T0bAnd T0cRespectively temperature measuring point corresponds to conductor temperature.
Step 3: radial temperature inverting
Establish Transient Thermal Circuit model: buses of insulation tubes ontology is identical as a upper embodiment in the present embodiment.It can be according in table 3
Parameter constructs Transient Thermal Circuit model as shown in Figure 2 and adoption status quantity method is solved, referring in particular to a upper embodiment
Step 3.
In this specific embodiment, temperature data at each temperature measuring point is recorded as sampling period measurement using 1min and bus passes through
Electric current, radial inversion obtains temperature measuring point and corresponds to conductor temperature, is with preceding 4 minutes measurement data and inverting data shown in table 7
Example,
Table 7:1min~4min radial inversion data
| Time | Tsa | Tsb | Tsc | T0a | T1a | T2a | T0b | T1b | T2b | T0c | T1c | T2c |
| 1min | 25.029 | 25.029 | 25.029 | 25.668 | 25.272 | 25.059 | 25.668 | 25.272 | 25.059 | 25.668 | 25.272 | 25.059 |
| 2min | 25.103 | 25.103 | 25.103 | 26.227 | 25.623 | 25.177 | 26.227 | 25.623 | 25.177 | 26.227 | 25.623 | 25.177 |
| 3min | 25.222 | 25.223 | 25.223 | 26.720 | 25.989 | 25.342 | 26.720 | 25.989 | 25.342 | 26.720 | 25.989 | 25.342 |
| 4min | 25.382 | 25.382 | 25.382 | 27.168 | 26.352 | 25.542 | 27.168 | 26.353 | 25.542 | 27.168 | 26.353 | 25.542 |
Wherein, Tsa、TsbAnd TscThe average temperature of temperature sensor measurement at respectively temperature measuring point a, temperature measuring point b and temperature measuring point c
Degree；T0a、T1aAnd T2aThermal circuit model corresponds to the temperature of each node at respectively temperature measuring point a, wherein T0aThat is temperature measuring point a correspondence is led
Temperature；T0a、T1bAnd T2bThermal circuit model corresponds to the temperature of each node at respectively temperature measuring point b, wherein T0bThat is b pairs of temperature measuring point
Answer conductor temperature；T0c、T1cAnd T2cThermal circuit model corresponds to the temperature of each node at respectively temperature measuring point c, wherein T0cThat is temperature measuring point
C corresponds to conductor temperature.
Step 4: axial temperature inverting
The T obtained with step 30a、T0bAnd T0cFor known quantity, it is updated in step 2 gained inverting relational expression (9), inverting obtains
To busbar joint conductor temperature Tj.With preceding 4 minutes inverting data instances shown in table 8,
Table 8:1min~4min axial direction inverting data
| Time | T0a | T0b | T0c | Tj |
| 1min | 25.668 | 25.668 | 25.668 | 25.839 |
| 2min | 26.227 | 26.227 | 26.227 | 26.533 |
| 3min | 26.720 | 26.720 | 26.720 | 27.145 |
| 4min | 27.168 | 27.168 | 27.168 | 27.701 |
Wherein, T0a、T0bAnd T0bRespectively temperature measuring point a, temperature measuring point b and temperature measuring point c correspond to conductor temperature, TjFor this implementation
Example buses of insulation tubes connector conductor temperature.Buses of insulation tubes connector conductor temperature on-line monitoring method operation letter of the present invention
It is single, operand is small, versatility is good, various terminal type be suitable for using.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (7)
1. buses of insulation tubes connector conductor temperature on-line monitoring method, it is characterised in that: including
Step 1: multiple temperature measuring points are set on bus bulk epidermis, and multiple temperature measuring points are axially distributed and are respectively positioned on bus
The temperature measuring point of the side of connector, distalmost end is no more than 3 meters apart from busbar joint, and the temperature measuring point of most proximal end is many apart from busbar joint
In 0.1 meter, heat insulation protection cover is equipped with outside each temperature measuring point；
Step 2: axial Up Highway UHW connector conductor temperature being established using Function Fitting method and each temperature measuring point corresponds to conductor temperature
Inverting relationship；
Step 3: establishing Transient Thermal Circuit model, using temperature radial inversion algorithm, inverting obtains each temperature measuring point and corresponds to conductor temperature；
Wherein, the thermal resistance of the Transient Thermal Circuit model is made of the insulating layer thermal resistance and outer layer thermal resistance of buses of insulation tubes ontology；
Step 4: each temperature measuring point obtained by step 3 being corresponded into conductor temperature and is updated in step 2 gained inverting relationship, inverting obtains mother
Wire terminal conductor temperature.
2. buses of insulation tubes connector conductor temperature on-line monitoring method according to claim 1, it is characterised in that: step 1
In, the temperature sensor of each temperature measuring point is respectively provided with one or more, and each temperature sensor is respectively positioned on heat-insulated guarantor
In shield.
3. buses of insulation tubes connector conductor temperature on-line monitoring method according to claim 2, it is characterised in that: step 1
In, the quantity of the temperature measuring point is 2~6.
4. buses of insulation tubes connector conductor temperature on-line monitoring method according to claim 3, it is characterised in that: step 1
In, the heat insulation protection cover with a thickness of 1mm~50mm.
5. buses of insulation tubes connector conductor temperature on-line monitoring method, feature described in any one of -4 according to claim 1
It is: it is described to establish axial Up Highway UHW connector conductor temperature and each temperature measuring point corresponds to the inverting relationship of conductor temperature in step 2,
It is the Analysis of Transient Thermal Field emulation carried out according to buses of insulation tubes Temperature Field Simulation model under multiple single step current loads, then mentions
The data set of conductor temperature at connector temperature and each temperature measuring point is taken, and axial inverting between the two is obtained by Function Fitting and is closed
System.
6. buses of insulation tubes connector conductor temperature on-line monitoring method according to claim 5, it is characterised in that: step 3
In, it is described to establish Transient Thermal Circuit model, it is that each layer thermal resistance and thermal capacitance are calculated according to the layered structure of buses of insulation tubes, then
The Transient Thermal Circuit model of buses of insulation tubes ontology is established in layering.
7. buses of insulation tubes connector conductor temperature on-line monitoring method according to claim 6, it is characterised in that: step 3
In, the radial inversion algorithm adoption status equation solution.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111157130A (en) * | 2020-03-03 | 2020-05-15 | 成都盛帮双核科技有限公司 | Metal enclosed switch main bus temperature measuring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257761B1 (en) * | 1997-12-30 | 2001-07-10 | National Science Council | Insulation measuring apparatus which forces heat flow in one direction with a constant temperature region |
| CN103323703A (en) * | 2013-05-30 | 2013-09-25 | 武汉大学 | Cable connector fault diagnosing method |
| CN104776938A (en) * | 2015-04-14 | 2015-07-15 | 武汉大学 | Cable-joint cable core temperature inversion method and system on basis of surface temperature of cable |
-
2019
- 2019-04-15 CN CN201910300299.5A patent/CN109900372A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257761B1 (en) * | 1997-12-30 | 2001-07-10 | National Science Council | Insulation measuring apparatus which forces heat flow in one direction with a constant temperature region |
| CN103323703A (en) * | 2013-05-30 | 2013-09-25 | 武汉大学 | Cable connector fault diagnosing method |
| CN104776938A (en) * | 2015-04-14 | 2015-07-15 | 武汉大学 | Cable-joint cable core temperature inversion method and system on basis of surface temperature of cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111157130A (en) * | 2020-03-03 | 2020-05-15 | 成都盛帮双核科技有限公司 | Metal enclosed switch main bus temperature measuring device |
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Application publication date: 20190618 |