CN104568211A - Switch cabinet contact and busbar connection point temperature rise online monitoring device and working method thereof - Google Patents
Switch cabinet contact and busbar connection point temperature rise online monitoring device and working method thereof Download PDFInfo
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- CN104568211A CN104568211A CN201510031673.8A CN201510031673A CN104568211A CN 104568211 A CN104568211 A CN 104568211A CN 201510031673 A CN201510031673 A CN 201510031673A CN 104568211 A CN104568211 A CN 104568211A
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- cabinet
- temperature
- contact
- tie point
- temperature rise
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
- G01K7/427—Temperature calculation based on spatial modeling, e.g. spatial inter- or extrapolation
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- General Physics & Mathematics (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a switch cabinet contact and busbar connection point temperature rise online monitoring device and a working method of the switch cabinet contact and busbar connection point temperature rise online monitoring device. The device comprises an out-cabinet temperature measurement sensor, an in-cabinet temperature measurement sensor, an environment temperature sensor and an SF6 gas pressure sensor, wherein the out-cabinet temperature measurement sensor is used for detecting the temperature of a cabinet body of a switch cabinet; the in-cabinet temperature measurement sensor is used for detecting the temperature in the switch cabinet; the environment temperature sensor is used for detecting the temperature of the environment where the switch cabinet is located; the SF6 gas pressure sensor is used for detecting the pressure of SF6 gas in the switch cabinet; the output ends of the sensors are connected with signal acquisition ends of a processor module; the processor module is suitable for establishing an SF6 gas pressure and cabinet body temperature conversion model and used for judging temperature rise of the connection point of a contact and/or a busbar in the cabinet according to the temperature of the cabinet body, the temperature in the cabinet and the temperature of the environment; when the temperature in the cabinet rises and the temperature of the environment is lower than the temperature of the cabinet body, if it is judged that the pressure of the SF6 gas rises through the conversion model, it is judged that the connecting point of the contact and/or the busbar in the cabinet is overheated.
Description
Technical field
The invention belongs to power transmission and transformation equipment state monitoring technical field, be specifically related to a kind of new gas insulated switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device and method of work.
Background technology
High-tension switch gear, as the visual plant in generating plant, transformer station, plays a part to close and cut-off line of electric force, is used for realizing conveying and switching electric load and exit faulty equipment and line segment from electric system, thus ensures safe operation of power system.In high-tension switch gear During Process of Long-term Operation, the positions such as the contact in switchgear and bus bar junction generate heat because aging and contact resistance is excessive, and the temperature of these heating positions cannot be monitored, and easily causes fire failure thus.In recent years, there is a lot of switchgear overheat accident in power plant and transformer station, cause fire and large-area power failure.Thus high-tension switch gear detected and monitor the working temperature of high-voltage switch gear contact, bus bar junction, find in advance and get rid of hot stall hidden danger, the safe and reliable operation of electric system is had very important significance.
The safe operation monitoring of high-tension switch gear is one of key subjects of safe operation of power system always, but, usual all check weighings are in the research to electrical parameter (voltage, electric current, electric power) real time monitoring at present, its non electrical quantity on-line measurement (such as the contact position degree of bias, contact load, contact temperature), owing to being subject to the restriction of high voltage and point position and highfield interference, solves so far not yet very well.Generally use trolley type switch cabinet at present, connect owing to adopting plug between isolating switch with switch cubicle, when dolly and switch cubicle are because manufacturing, transport and install and bad etc. contact will be caused bad, contact resistance increases, occur that contact temperature rise is too high even to burn, cause power failure, these phenomenons at high-current switch as particularly outstanding on incoming line cabinet, and impact greatly, high-voltage switch contact and bus bar junction are in high voltage, high-temperature, in highfield and extremely strong electromagnetic interference environment, traditional temperature instrumentation is as thermopair, infrared thermometers etc. are vulnerable to interference and the impact of these factors, thus direct contact measurement cannot be carried out to these positions, thus really cannot obtain the real work state of high-tension switch cabinet, so that device interior local overheating is but still run in " in spite of illness ".
And, in switch cubicle, because contact quantity is 6, also have 3 busbars, because heating end is at high voltage end, measurement instrument is arranged on low-voltage end, if directly temperature sensor is directly installed on contact of breaker or on busbar, high voltage can be guided to low-voltage end like this, cause equipment high electrical breakdown, so bring difficulty to gas-insulated closed switch cabinet contact temperature measurement.
Therefore, how solving the problems of the technologies described above is the technical barrier of this area.
Summary of the invention
The object of this invention is to provide a kind of switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, method of work and system, to solve the measurement to gas-insulated closed switch cabinet contact/or the temperature rise of busbar tie point.
In order to solve the problems of the technologies described above, the invention provides a kind of gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, comprising: the outer temperature probe of cabinet, for the cabinet temperature of detector switch cabinet;
Temperature probe in cabinet, for the in-cabinet temperature of detector switch cabinet; Environment temperature sensor, for the environment temperature residing for detector switch cabinet; And SF6 gas pressure sensor, for the SF6 gaseous tension in detecting box; The output terminal of each sensor is connected with each signals collecting end of processor module respectively; Described processor module is suitable for the scaling module setting up SF6 gaseous tension and cabinet temperature, and judges contact/or the temperature rise of busbar tie point in cabinet according to described cabinet temperature, in-cabinet temperature and environment temperature; Namely when in-cabinet temperature raises, and described environment temperature lower than cabinet temperature time, if judge that SF6 gaseous tension raises by described scaling module, then to judge in cabinet contact and/or busbar tie point overheated.
Further, described scaling module is P=f(T), the SF6 gaseous tension namely at different cabinet temperature;
In formula, P is SF6 gaseous tension, and T is cabinet temperature.
Preferably, described scaling module is suitable for drawing cabinet temperature changing curve diagram by least square method
f（T）=K
1P(T)
2+K
2P(T)+K
3；
In formula, K
1, K
2, K
3the constant determined according to concrete cabinet volume, contact temperature, environment temperature respectively.
Further, described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device also comprise: address circuit, display circuit, keyboard circuit, memory circuit, clock circuit, alarm output circuit and communication interface circuit; The output terminal of address circuit, keyboard circuit is connected with the I/O mouth of processor module respectively; The input end of alarm output circuit, display circuit is connected with the I/O mouth of processor module; Communication interface circuit is connected with the communication port of processor module; And memory circuit, clock circuit input end be connected with processor module.
Further, described alarm output circuit comprises relay, and the alarm module be connected with this relay.
Further, described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device are suitable for by communication interface circuit and the data communication of cloud service Surveillance center, to pass through this cloud service Surveillance center Realization analysis, storage, statistics, draw temperature rise curve, and form corresponding all kinds of statistical report form.
Another aspect, present invention also offers the method for work of a kind of gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, comprising:
The cabinet temperature of detector switch cabinet, in-cabinet temperature and the environment temperature residing for switch cubicle; Set up the scaling module of SF6 gaseous tension and cabinet temperature, and judge contact/or the temperature rise of busbar tie point in cabinet according to described cabinet temperature, in-cabinet temperature and environment temperature; Namely when in-cabinet temperature raises, and described environment temperature lower than cabinet temperature time, if judge that SF6 gaseous tension raises by described scaling module, then to judge in cabinet contact and/or busbar tie point overheated.
Further, described scaling module is P=f(T), the SF6 gaseous tension namely at different cabinet temperature;
In formula, P is SF6 gaseous tension, and T is cabinet temperature.
Further, described scaling module is suitable for drawing cabinet temperature changing curve diagram by least square method
f（T）=K
1P(T)
2+K
2P(T)+K
3；
In formula, K
1, K
2, K
3the constant determined according to concrete cabinet volume, contact temperature, environment temperature respectively.
The third aspect, present invention also offers a kind of gas insulation switch cabinet contact and busbar tie point temperature rise on-line detecting system, comprise: described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, and the cloud service Surveillance center data be connected with this on-Line Monitor Device; Described cloud service Surveillance center data are suitable for contact and/or busbar tie point temperature rise Plotting data temperature rise curve in the cabinet that transmits according to gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, and form corresponding all kinds of statistical report form.
The invention has the beneficial effects as follows, gas insulation switch cabinet contact of the present invention and busbar tie point temperature rise on-Line Monitor Device adopt gas pressure sensor, and in conjunction with temperature probe and environment temperature sensor in the outer temperature probe of cabinet, cabinet, and by setting up the scaling module of SF6 gaseous tension and cabinet temperature, realize the on-line monitoring of switch cubicle temperature rise, to ensure the healthy and safe operation of switch cubicle, there is judgment accuracy high, judge few advantage by accident.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the theory diagram of gas insulation switch cabinet contact of the present invention and busbar tie point temperature rise on-Line Monitor Device.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Embodiment 1
Fig. 1 shows the theory diagram of gas insulation switch cabinet contact of the present invention and busbar tie point temperature rise on-Line Monitor Device.
As shown in Figure 1, gas insulation switch cabinet contact of the present invention and busbar tie point temperature rise on-Line Monitor Device, comprising:
The outer temperature probe of cabinet, for the cabinet temperature of detector switch cabinet; Temperature probe in cabinet, for the in-cabinet temperature of detector switch cabinet; Environment temperature sensor, for the environment temperature residing for detector switch cabinet; And SF6 gas pressure sensor, for the SF6 gaseous tension in detecting box; The output terminal of each sensor is connected with each signals collecting end of processor module respectively; Described processor module is suitable for the scaling module setting up SF6 gaseous tension and cabinet temperature, and judges contact/or the temperature rise of busbar tie point in cabinet according to described cabinet temperature, in-cabinet temperature and environment temperature; Namely when in-cabinet temperature raises, and described environment temperature lower than cabinet temperature time, if judge that SF6 gaseous tension raises by described scaling module, then to judge in cabinet contact and/or busbar tie point overheated.
Optionally, the outer temperature probe of cabinet can the temperature of at least one test point of ectosome of detector switch cabinet.
Further, described scaling module is P=f(T), the SF6 gaseous tension namely at different cabinet temperature;
In formula, P is SF6 gaseous tension, and T is cabinet temperature.
Preferably, described scaling module is suitable for drawing cabinet temperature changing curve diagram by least square method
f（T）=K
1P(T)
2+K
2P(T)+K
3；
In formula, K
1, K
2, K
3the constant determined according to concrete cabinet volume, contact temperature, environment temperature respectively.
Wherein, the normal range of SF6 gaseous tension is 0.35-0.65Mpa, then to illustrate in cabinet contact and/or the temperature rise of busbar tie point normal.
Principle of work of the present invention is, temperature rise in cabinet can be caused to raise when contact of breaker or the temperature rise of busbar junction raise, in-cabinet temperature rising can cause cabinet temperature to raise, comparing with environment temperature by measuring cabinet temperature like this, if environment temperature is lower, and cabinet some temperature outside is all higher, the relation of reference SF6 gaseous tension and cabinet temperature at the same time, if now gaseous tension is higher again, then judge that in cabinet, temperature rise is really higher, thus indirectly can judge that in cabinet, contact and/or busbar tie point generate heat; If environment temperature is higher, and cabinet some temperature outside also higher (basic identical with environment temperature), at the same time with reference to the relation of SF6 gaseous tension and cabinet temperature, if now gaseous tension is at normal range (0.35-0.65MPa), to illustrate in cabinet contact and/or the temperature rise of busbar tie point normal.
Further, described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device also comprise: address circuit, display circuit, keyboard circuit, memory circuit, clock circuit, alarm output circuit and communication interface circuit; The output terminal of address circuit, keyboard circuit is connected with the I/O mouth of processor module respectively; The input end of alarm output circuit, display circuit is connected with the I/O mouth of processor module; Communication interface circuit is connected with the communication port of processor module; And memory circuit, clock circuit input end be connected with processor module.
As optional embodiment a kind of in the present embodiment, described alarm output circuit comprises relay, and the alarm module be connected with this relay.Described alarm module can be, but not limited to adopt sound and light alarm.And the setting dynamic/static contact temperature rise value of disconnector, a plug temperature rise value of isolating switch, the temperature rise value of copper bar row overlap joint are normal value when being all not more than 65K.
Further, in order to realize long-range ipc monitor, described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device are suitable for by communication interface circuit and the data communication of cloud service Surveillance center, to pass through this cloud service Surveillance center Realization analysis, storage, statistics, draw temperature rise curve, and form corresponding all kinds of statistical report form.
Optionally, SF6 gas pressure sensor is Gas Density Sensor, and gas density when gaseous tension auto modification is nominal 20 DEG C by temperature probe in employing cabinet, in cabinet, temperature probe is arranged on gas pressure sensor, measures near gas pressure sensor place in-cabinet temperature.
Described processor module is such as but not limited to adopting single-chip microcomputer, flush bonding processor module.
Embodiment 2
On embodiment 1 basis, present invention also offers the method for work of a kind of gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, comprising:
The cabinet temperature of detector switch cabinet, in-cabinet temperature and the environment temperature residing for switch cubicle; Set up the scaling module of SF6 gaseous tension and cabinet temperature, and judge contact/or the temperature rise of busbar tie point in cabinet according to described cabinet temperature, in-cabinet temperature and environment temperature; Namely when in-cabinet temperature raises, and described environment temperature lower than cabinet temperature time, if judge that SF6 gaseous tension raises by described scaling module, then to judge in cabinet contact and/or busbar tie point overheated.
Further, described scaling module is P=f(T), the SF6 gaseous tension namely at different cabinet temperature;
In formula, P is SF6 gaseous tension, and T is cabinet temperature.
Preferably, described scaling module is suitable for drawing cabinet temperature changing curve diagram by least square method
f（T）=K
1P(T)
2+K
2P(T)+K
3；
In formula, K
1, K
2, K
3the constant determined according to concrete cabinet volume, contact temperature, environment temperature respectively.
Concrete, the computing method of cabinet temperature and SF6 gaseous tension adopt PV=nRT, and wherein P is gas pressure intensity, MPa; T is cabinet temperature, K; V is gas volume, L; M is gas molar quality, g/mol; R is mol gas constant, 0.082MPa.L; N represents the amount of gaseous matter; P (T) can obtain its corresponding relation by measuring the several times of cabinet temperature and SF6 gaseous tension, and contact temperature, cabinet volume and environment temperature utilize measured test data to set up f(T)=P.Because SF6 gas fills in airtight metal cabinet, and metal cabinet volume and area larger, if contact heating can by SF6 gaseous conductance on metal cabinet, cabinet is generated heat, SF6 gas temperature and metal cabinet temperature is made substantially to reach unanimity like this, so just SF6 gas temperature can be known by measuring cabinet temperature.
Embodiment 3
A kind of gas insulation switch cabinet contact in embodiment 1 and embodiment 2 basis and busbar tie point temperature rise on-line detecting system, comprise: described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, and the cloud service Surveillance center data be connected with this on-Line Monitor Device; Described cloud service Surveillance center data are suitable for contact and/or busbar tie point temperature rise Plotting data temperature rise curve in the cabinet that transmits according to gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, and form corresponding all kinds of statistical report form.
Can see the relevant statement of embodiment 1 and embodiment 2 about the embodiment of described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device in the present embodiment.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (10)
1. gas insulation switch cabinet contact and a busbar tie point temperature rise on-Line Monitor Device, is characterized in that, comprising:
The outer temperature probe of cabinet, for the cabinet temperature of detector switch cabinet;
Temperature probe in cabinet, for the in-cabinet temperature of detector switch cabinet;
Environment temperature sensor, for the environment temperature residing for detector switch cabinet; And
SF6 gas pressure sensor, for the SF6 gaseous tension in detecting box;
The output terminal of each sensor is connected with each signals collecting end of processor module respectively;
Described processor module is suitable for the scaling module setting up SF6 gaseous tension and cabinet temperature, and judges contact/or the temperature rise of busbar tie point in cabinet according to described cabinet temperature, in-cabinet temperature and environment temperature; Namely
When in-cabinet temperature raises, and described environment temperature lower than cabinet temperature time, if judge that SF6 gaseous tension raises by described scaling module, then to judge in cabinet contact and/or busbar tie point overheated.
2. gas insulation switch cabinet contact according to claim 1 and busbar tie point temperature rise on-Line Monitor Device, is characterized in that,
Described scaling module is P=f(T), the SF6 gaseous tension namely at different cabinet temperature;
In formula, P is SF6 gaseous tension, and T is cabinet temperature.
3. gas insulation switch cabinet contact according to claim 2 and busbar tie point temperature rise on-Line Monitor Device, is characterized in that,
Described scaling module is suitable for drawing cabinet temperature changing curve diagram by least square method, namely
f（T）=K
1P(T)
2+K
2P(T)+K
3；
In formula, K
1, K
2, K
3for constant, i.e. K
1according to concrete cabinet volume, K
2contact temperature, K
3environment temperature.
4., according to the arbitrary described gas insulation switch cabinet contact of claim 1-3 and busbar tie point temperature rise on-Line Monitor Device, it is characterized in that,
Described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device also comprise: address circuit, display circuit, keyboard circuit, memory circuit, clock circuit, alarm output circuit and communication interface circuit;
The output terminal of address circuit, keyboard circuit is connected with the I/O mouth of processor module respectively;
The input end of alarm output circuit, display circuit is connected with the I/O mouth of processor module;
Communication interface circuit is connected with the communication port of processor module; And
The input end of memory circuit, clock circuit is connected with processor module.
5. gas insulation switch cabinet contact according to claim 4 and busbar tie point temperature rise on-Line Monitor Device, it is characterized in that, described alarm output circuit comprises relay, and the alarm module be connected with this relay.
6. gas insulation switch cabinet contact according to claim 5 and busbar tie point temperature rise on-Line Monitor Device, it is characterized in that, described gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device are suitable for by communication interface circuit and the data communication of cloud service Surveillance center, to pass through this cloud service Surveillance center Realization analysis, storage, statistics, draw temperature rise curve, and form corresponding all kinds of statistical report form.
7. a method of work for gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, comprising:
The cabinet temperature of detector switch cabinet, in-cabinet temperature and the environment temperature residing for switch cubicle;
Set up the scaling module of SF6 gaseous tension and cabinet temperature, and judge contact/or the temperature rise of busbar tie point in cabinet according to described cabinet temperature, in-cabinet temperature and environment temperature; Namely
When in-cabinet temperature raises, and described environment temperature lower than cabinet temperature time, if judge that SF6 gaseous tension raises by described scaling module, then to judge in cabinet contact and/or busbar tie point overheated.
8. method of work according to claim 7, is characterized in that,
Described scaling module is P=f(T), the SF6 gaseous tension namely at different cabinet temperature;
In formula, P is SF6 gaseous tension, and T is cabinet temperature.
9. method of work according to claim 8, is characterized in that,
Described scaling module is suitable for drawing cabinet temperature changing curve diagram by least square method
f（T）=K
1P(T)
2+K
2P(T)+K
3；
In formula, K
1, K
2, K
3for constant, i.e. K
1according to concrete cabinet volume, K
2contact temperature, K
3environment temperature.
10. a gas insulation switch cabinet contact and busbar tie point temperature rise on-line detecting system, it is characterized in that, comprise: gas insulation switch cabinet contact as described in as arbitrary in claim 1-3 and busbar tie point temperature rise on-Line Monitor Device, and the cloud service Surveillance center data be connected with this on-Line Monitor Device;
Described cloud service Surveillance center data are suitable for contact and/or busbar tie point temperature rise Plotting data temperature rise curve in the cabinet that transmits according to gas insulation switch cabinet contact and busbar tie point temperature rise on-Line Monitor Device, and form corresponding all kinds of statistical report form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031673.8A CN104568211A (en) | 2015-01-22 | 2015-01-22 | Switch cabinet contact and busbar connection point temperature rise online monitoring device and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031673.8A CN104568211A (en) | 2015-01-22 | 2015-01-22 | Switch cabinet contact and busbar connection point temperature rise online monitoring device and working method thereof |
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| CN104568211A true CN104568211A (en) | 2015-04-29 |
Family
ID=53084802
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| CN201510031673.8A Pending CN104568211A (en) | 2015-01-22 | 2015-01-22 | Switch cabinet contact and busbar connection point temperature rise online monitoring device and working method thereof |
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| CN105092050A (en) * | 2015-08-13 | 2015-11-25 | 国家电网公司 | Method and device for detecting overheat fault of GIS (Gas Insulated Switchgear) internal conductors |
| CN106099689A (en) * | 2016-06-28 | 2016-11-09 | 徐荣婷 | A kind of low energy consumption intelligent fire fighting power distribution cabinet |
| CN109473878A (en) * | 2018-10-26 | 2019-03-15 | 国电南京自动化股份有限公司 | A kind of In-Line Temperature Measure System of locomotive power supply dc switch cabinet body |
| CN110542453A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Remote gas density relay and monitoring system |
| CN110726489A (en) * | 2019-12-03 | 2020-01-24 | 安徽工业大学 | Comprehensive testing device for temperature field of power switch cabinet |
| CN114325180A (en) * | 2021-12-14 | 2022-04-12 | 国网河南省电力公司检修公司 | Power equipment heating diagnosis method based on pressure monitoring of sulfur hexafluoride meter |
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| CN110726489A (en) * | 2019-12-03 | 2020-01-24 | 安徽工业大学 | Comprehensive testing device for temperature field of power switch cabinet |
| CN110726489B (en) * | 2019-12-03 | 2024-05-28 | 安徽工业大学 | Comprehensive testing device for temperature field of power switch cabinet |
| CN114325180A (en) * | 2021-12-14 | 2022-04-12 | 国网河南省电力公司检修公司 | Power equipment heating diagnosis method based on pressure monitoring of sulfur hexafluoride meter |
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Application publication date: 20150429 |