CN105547508B - A kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry - Google Patents

A kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry Download PDF

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Publication number
CN105547508B
CN105547508B CN201610041194.9A CN201610041194A CN105547508B CN 105547508 B CN105547508 B CN 105547508B CN 201610041194 A CN201610041194 A CN 201610041194A CN 105547508 B CN105547508 B CN 105547508B
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China
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temperature
cabinet
data
switch
host computer
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CN201610041194.9A
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CN105547508A (en
Inventor
朱晓光
吕齐
刘志鸿
张宇娇
方小方
邓新财
张雷
傅建辉
王申华
曹保良
吴辉
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State Grid Corp of China SGCC
China Three Gorges University CTGU
Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Wuyi Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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State Grid Corp of China SGCC
China Three Gorges University CTGU
Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Wuyi Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, China Three Gorges University CTGU, Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd, Wuyi Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201610041194.9A priority Critical patent/CN105547508B/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements

Abstract

A kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry, including the multiple Temperature samplers being adsorbed in outside cabinet door, temperature receptacle, host computer, the temperature receptacle are connected with host computer by data wire, and host computer is located in the control room of transformer station.The Temperature sampler includes housing, the hull outside sets magnet, magnetic adsorption type structure is formed with the cabinet wall of switch cubicle, it is divided into measurement chamber and circuit chamber in housing, measurement intracavitary is equiped with temperature sensor, circuit intracavitary is equiped with circuit board, and the circuit board is provided with the first data processing module, the first power module, radio frequency sending module, and temperature sensor is connected with the circuit board.The present invention a kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry, by measuring door of switch cabinet hull-skin temperature, with reference to the temperature field analysis of switch cubicle, the temperature at required thermometric position in cabinet is obtained indirectly.The defects of overcoming prior art, thermometric accurately facilitate, more practicality.

Description

A kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry
Technical field
The present invention a kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry, are related to temperature of high-tension switch cabinet Detection field.
Background technology
In unattended operation transformer station, the thermometric to high-tension switch cabinet is essential.Surveyed for the temperature of switch cubicle Often infrared measurement of temperature is used in amount engineering, but due to the limitation of cabinet inner structure, for the frequent quilt of infrared measurement of temperature at some positions in cabinet Stop and thermometric task can not be completed well.In view of this point, some present Direct-type temperature sensing meanses such as optical fiber temperature-measurements are also just Progressively attract attention, device for detecting temperature is often directly mounted on switch cubicle domestic demand thermometric position by it, and this may influence The normal operation of switch cubicle, it is also possible to which the cabinet inner part for being caused to be in direct contact with it due to the failure of monitoring device is broken down So that whole switch cubicle is caused to break down.
The content of the invention
The present invention provides a kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry, by measuring switch cubicle Cabinet door hull-skin temperature, with reference to the temperature field analysis of switch cubicle, the temperature at required thermometric position in cabinet is obtained indirectly.Overcome existing There is the defects of technology, thermometric accurately facilitates, more practicality.
The technical solution adopted in the present invention is:
A kind of switch cabinet temperature detection means based on cabinet door external pelivimetry, including the multiple temperature acquisitions being adsorbed in outside cabinet door Device, temperature receptacle, host computer, the temperature receptacle are connected with host computer by data wire, and host computer is located at transformer station In control room.
The Temperature sampler includes housing, and the hull outside sets magnet, and magnetic suck is formed with the cabinet wall of switch cubicle Formula structure, measurement chamber and circuit chamber are divided into housing, measurement intracavitary is equiped with temperature sensor, and circuit intracavitary is equiped with circuit Plate, the circuit board are provided with the first data processing module, the first power module, radio frequency sending module, temperature sensor and institute State circuit board connection.
The closed cavity body that the housing is made up of base, magnetic connector, spun at base upper port on cover, upper lid Place has aperture to be stretched out for radio-frequency antenna.
The temperature receptacle includes Receiver Module, the second data processing module, second source module;Adopted in temperature There is wireless signal transmission passage between storage and temperature receptacle.
The present invention a kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry, technique effect are as follows:
1:By measuring switch cabinet, temperature obtains the temperature at required thermometric position in cabinet indirectly outdoors.The method is on the one hand Do not influenceed, on the other hand temperature measuring equipment will not be directly installed on inside cabinet so as to influence high pressure by labyrinth in cabinet The normal operation of switch cubicle.
2:In addition to switch cubicle in for transformer station, it may also be used for capacitor box etc. is a series of to be needed to carry out matching somebody with somebody for temperature detection Electric cabinet.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the Temperature sampler structure chart of apparatus of the present invention;
Fig. 3 is the temperature checking method flow chart of apparatus of the present invention;
The thermo parameters method figure of switch cubicle when Fig. 4 is the load current 400A of apparatus of the present invention;
Fig. 5 is homologous thread figure of the switch cubicle of apparatus of the present invention under 20 DEG C of environment temperature, 400A load currents.
Wherein:1- cabinet doors, 2- Temperature samplers, 3- temperature receptacles, 4- host computers, 5- measurement chambers, 6- circuit chambers, 7- temperature Spend sensor, the data processing modules of 8- first, the power modules of 9- first, 10- radio frequency sending modules, 11-- bases, 12- magnetic connects Device, 13- radio-frequency antennas.
Embodiment
As shown in Figure 1 and Figure 2, a kind of switch cabinet temperature detection means based on cabinet door external pelivimetry, including it is adsorbed in cabinet door 1 Outer multiple Temperature samplers 2, temperature receptacle 3, host computer 4, the temperature receptacle 3 are connected with host computer 4 by data wire Connect, host computer 4 is located in the control room of transformer station.
The Temperature sampler 2 includes housing, and the hull outside sets magnet, and magnetic is formed with the cabinet wall 14 of switch cubicle Attached formula structure, measurement chamber 5 and circuit chamber 6 are divided into housing, measure and temperature sensor 7 is equiped with chamber 5, installed in circuit chamber 6 There is circuit board, the circuit board is provided with the first data processing module 8, the first power module 9, radio frequency sending module 10, temperature Sensor 7 is connected with the circuit board.
The closed cavity body that the housing is made up of base 11, magnetic connector 12 so that Temperature sampler 2 can be with magnetic Switch cabinet wall 14 is invested, conveniently removes maintenance.Spin upper lid at port on the pedestal 11, has aperture to supply radio-frequency antenna at upper lid 13 stretch out.
The temperature receptacle 3 includes Receiver Module, the second data processing module, second source module;In temperature There is wireless signal transmission passage between collector 2 and temperature receptacle 3.
Wherein:The Temperature sampler 3 is three, respectively in the cabinet door and two sidecar walls of switch cubicle;The temperature Sensor 7 is DS18B20;The radio-frequency module, data processing module are integration module, are CC2530 chips;The power supply The one kind of module in 78 or 79 family chips, uses 5V button cells.
A kind of indirect-type switch cabinet temperature detection method based on temperature survey outside cabinet door, comprises the following steps:
Step 1, multiple Temperature samplers 2 are fixed on to the outside of cabinet wall 14, Temperature sampler 2 utilizes TEMP after energization Device 7 gathers the temperature of cabinet wall 14, and the first data processing module 8 is wirelessly sent out it by radio frequency sending module 10 after reading temperature data It is sent in temperature receptacle 3 Receiver Module.
After step 2, temperature receptacle 3 receive data, data are read by the second data processing module therein, and by data Host computer 4 is sent to by data wire.
Step 3, the combining environmental temperature of host computer 4, the load of switch cubicle are handled the data being collected into, inverting The temperature at the domestic demand that offers for sale thermometric position.
Step 4, output inversion result, judge whether to overheat.If overheat, host computer 4 sends warning message to person on duty's On mobile phone, step 3 is otherwise returned to.
The step 3 comprises the following steps:
Step 3.1, according to switch cabinet structure and surrounding environment, switch cubicle three-dimensional temperature field is built using limited element analysis technique Simulation model.Limited element analysis technique is simulated using the method for mathematical approach to physical system (geometry and load working condition), its Domain will be solved regard as and be made up of many small interconnection subdomains for being referred to as finite elements, each unit is assumed one it is suitable, compared with Simple approximate solution, what then this domain of Derivation was total meets condition, such as the equilibrium condition of structure, so as to obtain problem Solution.This method is adapted to various complicated shapes, is a kind of effective means for carrying out switch cabinet temperature field analysis.
The heating loss of switch cabinet derives from eddy-current loss, these heats by the heat transfer free convection on cabinet surface and Heat radiation two ways diffuses to surrounding environment.Assuming that the hot physical property of various materials is constant, do not change with material temperature.Then The governing equation in temperature field is:
ρ is the density of material in formula;λ, c are the thermal conductivity factor and specific heat of material;For endogenous pyrogen intensity.
Convection current and radiation boundary condition should be met on the outer surface of busbar
T in above formulaaIt is environment temperature;σ represents Shi Difen-Boltzmann constant;ε represents the hot incidence on busbar surface;kc Represent the convection transfer rate on busbar surface;Q represents heat flow density vector.
Switch cubicle threedimensional model is established according to cabinet sized data, to each several part region definition unit type, material in model Mesh generation, which is carried out, after material characteristic obtains the Three-Dimensional Simulation of Temperature Fields model for switch cabinet temperature field analysis.
Step 3.2, input environment temperature, load current, in cabinet each part material parameter, to switch cubicle three-dimensional temperature field Simulation model carries out Temperature Field Simulation, calculates the thermo parameters method of different loads lower switch cabinet.By switch cubicle under different electric currents Eddy-current loss caused by operation imports Three-Dimensional Simulation of Temperature Fields model as thermal source, and sets corresponding radiation boundary condition, With heat loss through convection boundary condition, the thermo parameters method under switch cubicle different loads electric current is calculated.Switch cubicle during load current 400A Thermo parameters method as shown in figure 4, the temperature value at each position of cabinet can be inquired about from distribution map.
Step 3.3, according to result of calculation, conclude temperature and pair of cabinet domestic demand thermometric spot temperature at the temperature measuring point of wall 14 that offers for sale Answer curve.Cabinet domestic demand thermometric position and the temperature value of 3 temperature measuring points on cabinet wall 14 are gathered in thermo parameters method figure, it is basic herein On thermometric spot temperature needed as transverse axis using inside, temperature measuring point temperature is the longitudinal axis, and the temperature for drawing 3 temperature measuring points successively is corresponding bent Line.Fig. 5 is homologous thread figure of the switch cubicle under 20 DEG C of environment temperature, 400A load currents.
Temperature data at step 3.4, the temperature measuring point that will be surveyed on obtained cabinet wall 14 substitutes into homologous thread, corresponding to obtain The temperature data at cabinet domestic demand thermometric position;Further, since temperature measuring point is more, obtained temperature data collection need to be fitted.It is logical Cross temperature measuring equipment and survey to obtain temperature measuring point temperature value on cabinet wall 14, the observed temperature value of 3 temperature measuring points is substituted into curve map and obtains 3 Individual corresponding points, range of 3 shops on transverse axis are the internal temperature value for needing thermometric position.Corresponding 3 temperature of 3 temperature measuring points Value, average so as to fit the internal actual temperature value for needing thermometric position.
Wherein, it is contemplated that switch cubicle load current in actual motion often changes, therefore the load described in step 3.2 Electric current is for a series of gradually increases but no more than the electric current value sequence of switch cubicle maximum operating currenbt.

Claims (4)

  1. A kind of 1. indirect-type switch cabinet temperature detection method based on temperature survey outside cabinet door, it is characterised in that:Including a kind of base In the switch cabinet temperature detection means of cabinet door external pelivimetry, the device includes being adsorbed in cabinet door(1)Outer multiple Temperature samplers (2), temperature receptacle(3), host computer(4), it is characterised in that the temperature receptacle(3)With host computer(4)Pass through data wire Connection, host computer(4)In the control room of transformer station, the Temperature sampler(2)Comprising housing, the hull outside is set Magnet, the cabinet wall with switch cubicle(14)Magnetic adsorption type structure is formed, is divided into measurement chamber in housing(5)With circuit chamber(6), measure chamber (5)Inside it is equiped with temperature sensor(7), circuit chamber(6)Circuit board is inside equiped with, the circuit board is provided with the first data processing Module(8), the first power module(9), radio frequency sending module(10), temperature sensor(7)It is connected with the circuit board, the shell Body is by base(11), magnetic connector(12)The closed cavity body of composition, in base(11)Spin upper lid at upper port, at upper lid There is aperture to supply radio-frequency antenna(13)Stretch out, the temperature receptacle(3)Including Receiver Module, the second data processing module, Second source module;In Temperature sampler(2)With temperature receptacle(3)Between have wireless signal transmission passage;
    Detection method comprises the following steps:
    Step 1, by multiple Temperature samplers(2)It is fixed on cabinet wall(14)Outside, Temperature sampler after energization(2)Passed using temperature Sensor(7)Gather cabinet wall(14)Temperature, the first data processing module(8)Passed through radio frequency sending module after reading temperature data (10)It is wirelessly transmitted in temperature receptacle(3)Receiver Module;
    Step 2, temperature receptacle(3)After receiving data, data are read by the second data processing module therein, and data are led to Cross data wire and be sent to host computer(4);
    Step 3, host computer(4)Combining environmental temperature, the load of switch cubicle are handled the data being collected into, and are finally inversed by The temperature at cabinet domestic demand thermometric position;
    Step 4, output inversion result, judge whether to overheat.
  2. 2. a kind of indirect-type switch cabinet temperature detection method based on temperature survey outside cabinet door according to claim 1, it is special Sign is that the step 3 comprises the following steps:
    Step 3.1, according to switch cabinet structure and surrounding environment, switch cubicle Three-Dimensional Simulation of Temperature Fields is built using limited element analysis technique Model;
    Step 3.2, input environment temperature, load current, in cabinet each part material parameter, to switch cubicle Three-Dimensional Simulation of Temperature Fields Model carries out Temperature Field Simulation, calculates the thermo parameters method of different loads lower switch cabinet;
    Step 3.3, according to result of calculation, conclusion is offerd for sale wall(14)Temperature is corresponding with cabinet domestic demand thermometric spot temperature at temperature measuring point Curve;
    Step 3.4, the cabinet wall that will be collected into(14)Temperature data at temperature measuring point substitutes into curve, obtains cabinet domestic demand thermometric position Temperature data collection;Further, since temperature measuring point is more, obtained temperature data collection need to be fitted.
  3. 3. a kind of indirect-type switch cabinet temperature detection method based on temperature survey outside cabinet door according to claim 2, it is special Sign is that the load current described in step 3.2 is for a series of gradually increases but no more than the electricity of switch cubicle maximum operating currenbt Flow valuve sequence.
  4. 4. a kind of indirect-type switch cabinet temperature detection method based on temperature survey outside cabinet door according to claim 2, it is special Sign is, nonlinear fitting is fitted to described in step 3.4.
CN201610041194.9A 2016-01-20 2016-01-20 A kind of switch cabinet temperature detection means and method based on cabinet door external pelivimetry Active CN105547508B (en)

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CN107014498A (en) * 2017-05-02 2017-08-04 广东电网有限责任公司中山供电局 A kind of switch cabinet temperature measurement and the device of fault diagnosis
CN109540334A (en) * 2018-12-19 2019-03-29 河北涿州京源热电有限责任公司 The method for early warning of generator overheating potential faults based on three-dimensional display
CN110220602B (en) * 2019-06-24 2020-08-25 广西电网有限责任公司电力科学研究院 Switch cabinet overheating fault identification method

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