CN111044155A - Air switch temperature online monitoring device of converter transformer control cabinet - Google Patents
Air switch temperature online monitoring device of converter transformer control cabinet Download PDFInfo
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- CN111044155A CN111044155A CN201911254927.7A CN201911254927A CN111044155A CN 111044155 A CN111044155 A CN 111044155A CN 201911254927 A CN201911254927 A CN 201911254927A CN 111044155 A CN111044155 A CN 111044155A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000009529 body temperature measurement Methods 0.000 claims description 23
- 230000003321 amplification Effects 0.000 claims description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 17
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 230000010287 polarization Effects 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 description 12
- 230000008054 signal transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to an on-line monitoring device for the temperature of an air switch of a converter transformer control cabinet, which comprises a transmitting end and a receiving end, wherein the transmitting end is in signal connection with the receiving end; the transmitting end comprises a sensor, a transmitting end control module and a transmitting end 433MHz module, the sensor is in signal connection with the transmitting end control module, and the sensor transmits the acquired temperature data to the transmitting end control module; the transmitting terminal control module is in signal connection with the transmitting terminal 433MHz module, data converted by digital-to-analog conversion of the transmitting terminal control module are transmitted to the transmitting terminal 433MHz module, and the collected temperature data are transmitted to the receiving terminal through the transmitting terminal 433MHz module. By adopting the technical scheme, the data security is improved; the monitoring cost is reduced; the workload of workers is reduced, and the safety risk is reduced, so that the work of the converter transformer can be safely and normally operated.
Description
Technical Field
The invention belongs to the field of online monitoring of the operation state of a converter transformer, and particularly relates to an online monitoring device for the temperature of an air switch of a converter transformer control cabinet.
Background
The converter station is a main component of a direct current transmission project; the direct-current transmission project is usually used for long-distance and large-capacity power transmission, is a main network of a power grid, is used as a converter station in an alternating-current and direct-current conversion place, and has self-evident importance; most control devices and main devices of the converter station have been automatically monitored. Theoretically, the operation and inspection personnel can monitor each device in the master control room. However, in actual operation, due to practical conditions such as cost and the like, automatic monitoring is not realized on part of equipment, such as a core area of the converter transformer, namely a control cabinet air switch, the volume of the control cabinet is small, internal elements are dense, the air switch is easy to heat and very sensitive, and huge hidden dangers are buried for safe operation of a direct current transmission system.
Because the temperature monitoring means is lacked in the converter transformer control cabinet, the operating personnel can only obtain the data of the heating condition of the air switch in the control cabinet through periodic temperature measurement, and the heating defect cannot be continuously tracked and monitored in time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the air switch temperature online monitoring device for the converter transformer control cabinet, which has the advantage of realizing online monitoring of an air switch and reduces the potential safety hazard in the operation of the air switch.
In order to achieve the purpose, the invention provides the following technical scheme:
the on-line monitoring device for the air switch temperature of the converter transformer control cabinet comprises a transmitting end and a receiving end, wherein the transmitting end is in signal connection with the receiving end; the transmitting terminal comprises a sensor, a transmitting terminal control module and a transmitting terminal 433MHz module, the sensor is in signal connection with the transmitting terminal control module, and the sensor transmits the acquired temperature data to the transmitting terminal control module;
the transmitting terminal control module is in signal connection with the transmitting terminal 433MHz module, data subjected to digital-to-analog conversion by the transmitting terminal control module are transmitted to the transmitting terminal 433MHz module, and the collected temperature data are sent to the receiving terminal by the transmitting terminal 433MHz module;
the receiving end comprises a receiving end 433MHz module, a receiving end control module and a display module; the receiving terminal 433MHz module is in signal connection with the transmitting terminal 433MHz module, channels of the receiving terminal 433MHz module and the transmitting terminal 433MHz module are adjusted to be consistent, the receiving terminal 433MHz module sends signals received by the transmitting terminal 433MHz module to the receiving terminal control module, digital-to-analog conversion is carried out by the receiving terminal control module, and then data are displayed on the display.
By adopting the technical scheme, the device uses the 433MHz module transmission technology, does not need to transmit data through the Internet, reduces the risk of data leakage in the Internet and improves the data security; meanwhile, equipment is assembled cheaply, and monitoring cost is reduced. Through foretell transmission technology, realize the continuous monitoring of commutation transformer control cabinet, hold air switch's temperature status in real time, make the staff can master the running state of commutation transformer control cabinet completely in the master control room, need not the staff and carry out periodic unpacking temperature measurement, staff's work load has been reduced, it is more convenient to make the temperature measurement of commutation transformer control cabinet, and reduce the safety risk, and then reduce the overheated situation of air switch and take place, thereby make the normal operating that the work of commutation transformer can be safe. When the working frequencies of the receiving terminal 433MHz module and the transmitting terminal 433MHz module are adjusted to be consistent, mutual communication is realized, interference of other channels is avoided, and the quality of signal transmission is improved.
The invention is further configured to: the transmitting terminal 433MHz module and the receiving terminal 433MHz module are both selected as HC-12433MHz wireless serial port modules, the HC-12433MHz wireless serial port modules need to be subjected to temperature calibration, and the calibration mode is that the environment temperature is directly measured by using an MLX9014AAA non-contact infrared temperature measurement module; and correcting the temperature of the measured object by comparing the temperature measured by the MLX9014AAA non-contact infrared temperature measurement module with the temperature measured by the FLIR infrared imager, wherein the temperature of the measured object is corrected by taking the temperature of the measured object as the reference.
By adopting the technical scheme, the non-contact infrared temperature measurement sensor usually has non-linear errors, the MLX9014AAA non-contact infrared temperature measurement module used in the project has obvious error characteristics when the ambient temperature is high, the temperature data displayed by the display is accurate through temperature calibration, the test errors of the MLX9014AAA non-contact infrared temperature measurement module are reduced, and the temperature test accuracy of the device is improved.
The invention is further configured to: the transmitter 433MHz module with the receiver 433MHz module both install signal gain module, signal gain module includes vertical polarization 433MHz antenna and XQ-433 two-way signal amplification module, XQ-433 two-way signal amplification module with the transmitter 433MHz module is connected, vertical polarization 433MHz antenna with the receiver 433MHz module is connected.
By adopting the technical scheme, the purpose that the low-power consumption 433MHz module is selected for use in the system is to reduce the transmission capability of wireless signals, and the signal transmission distance is adjusted by the signal gain module, so that the signal transmission distance is controllable. The signal gain module is directly connected to a signal transmitting/receiving end of the HC-12433MHz wireless serial port module to enhance the signal transmitting and receiving capability. According to field measurement, if the HC-12433MHz wireless serial port modules of the receiving end and the transmitting end only use spring antennas, the signal transmission distance is only about 15 meters under the meteorological condition with the humidity of 58.0%. And the wall penetration ability is low. And the XQ-433 bidirectional signal amplification module comprises a potentiometer, and the transmitting power can be adjusted by adjusting the potentiometer. Because the data transmission mode of the system is serial port communication, the problem of saturation distortion does not exist. If the data needs to be transmitted remotely, the potentiometer can be directly adjusted, so that the gain is maximized, and the distance is maximized.
The invention is further configured to: and the XQ-433 bidirectional signal amplification module is connected with a voltage stabilizing module for supplying power to the XQ-433 bidirectional signal amplification module.
By adopting the technical scheme, under the working condition of long-term operation, if the DC5V USB power supply is directly adopted for supplying power, the XQ-433 bidirectional signal amplification module is easy to smoke, so that the XQ-433 bidirectional signal amplification module is damaged, and the normal transmission of data is influenced, therefore, the voltage for supplying power to the XQ-433 bidirectional signal amplification module is more stable by arranging the voltage stabilizing module, and the overheating condition of the XQ-433 bidirectional signal amplification module is reduced.
The invention is further configured to: the sensor is an MLX9014AAA non-contact infrared temperature measurement module, and the diameter of a measured hot spot of the MLX9014AAA non-contact infrared temperature measurement module meets the following formula:
D≥Ltan32.5°+5
in the above formula, D is the diameter of the measured hot spot, L is the distance between the measured hot spot and the probe, and the unit is mm.
Through adopting above-mentioned technical scheme, with angle, diameter and the area standardization between sensor and the testee for the staff can calculate according to the formula when testing the air switch of the switch board of difference, obtains new parameter, thereby makes the temperature monitoring to the change current switch board more convenient, reduces staff's work load.
The invention is further configured to: the receiving end control module is provided with a plurality of serial ports connected with the sensors.
By adopting the technical scheme, the receiving end control module can be connected with a plurality of groups of sensors at the same time, so that temperature monitoring equipment is added, and the expansibility of the device is improved.
In conclusion, the invention has the following beneficial effects:
1. by using the 433MHz module transmission technology, the device does not need to transmit data through the Internet, reduces the risk of data leakage in the Internet and improves the data security; meanwhile, equipment is assembled cheaply, and monitoring cost is reduced. By the transmission technology, the continuous monitoring of the converter transformer control cabinet is realized, the temperature state of the air switch is mastered in real time, so that a worker can completely master the operation state of the converter transformer control cabinet in a main control room without carrying out periodical box opening temperature measurement, the workload of the worker is reduced, the temperature measurement of the converter transformer control cabinet is more convenient, the safety risk is reduced, the overheating condition of the air switch is reduced, and the converter transformer can safely and normally operate;
2. the purpose of selecting the low-power consumption 433MHz module for use through the system is to reduce the transmission capability of wireless signals, and the signal transmission distance is adjusted through the signal gain module, so that the signal transmission distance is controllable.
Drawings
FIG. 1 is a design framework diagram of the present embodiment;
FIG. 2 is a system wiring topology diagram of the present embodiment;
FIG. 3 is an angle response diagram of the MLX9014AAA non-contact infrared temperature measurement module of the present embodiment;
FIG. 4 is a view of the MLX9014AAA non-contact infrared temperature measurement module of the present embodiment;
FIG. 5 is an error diagram of the MLX9014AAA non-contact infrared temperature measurement module of the present embodiment;
fig. 6 is a temperature correction program diagram of the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 2, the online monitoring device for air switch temperature of a converter transformer control cabinet disclosed by the invention comprises a transmitting terminal installed in the control cabinet, wherein the transmitting terminal is in signal connection with a receiving terminal arranged in a main control room, the transmitting terminal comprises a sensor, a transmitting terminal control module and a transmitting terminal 433MHz module, the sensor is in signal connection with the transmitting terminal control module, and the sensor transmits acquired temperature data to the transmitting terminal control module; the transmitting terminal control module is in signal connection with the transmitting terminal 433MHz module, data converted through digital-to-analog conversion of the transmitting terminal control module are transmitted to the transmitting terminal 433MHz module, the transmitting terminal 433MHz module is in signal connection with a transmitting terminal signal gain module, and the collected temperature data are transmitted to a receiving terminal through the transmitting terminal signal gain module.
The receiving end comprises a receiving end signal gain module, a receiving end 433MHz module, a receiving end control module and a display module; the receiving end signal gain module is in signal connection with the receiving end 433MHz module, the receiving end 433MHz module is in signal connection with the transmitting end 433MHz module, channels of the receiving end 433MHz module and the transmitting end 433MHz module are adjusted to be consistent, the receiving end 433MHz module sends signals received from the transmitting end 433MHz module to the receiving end control module, digital-to-analog conversion is carried out through the receiving end control module, and then data are displayed on a display.
As shown in fig. 3 to 4, the sensor is selected as an MLX9014AAA non-contact infrared temperature measurement module, and the diameter of the measured hot spot of the MLX9014AAA non-contact infrared temperature measurement module should satisfy the following formula:
D≥Ltan32.5°+5
in the above formula, D is the diameter of the measured hot spot, L is the distance between the measured hot spot and the probe, and the unit is mm.
Both the transmitting terminal control module and the receiving terminal control module adopt STM32F103C8T6 singlechips, and on-chip resources comprise 48KB SRAM, 256KB Flash, 11 timers, 2 IIC, 5 serial ports, 1 USB, 3 SPI, 3 12-bit ADC, 2 12-bit DAC and 51 general I/O ports.
As shown in fig. 5 to 6, both the transmitting terminal 433MHz module and the receiving terminal 433MHz module are selected as HC-12433MHz wireless serial modules, the HC-12433MHz wireless serial modules need to be temperature calibrated, and the calibration mode is the ambient temperature directly measured by using the MLX9014AAA non-contact infrared temperature measurement module.
When the ambient temperature is within 50 ℃, the error of the tested project device is within +/-1 ℃. When the ambient temperature exceeds 50 ℃, the temperature measured by the device is 1-2 ℃ higher than that measured by the FLIR imaging instrument. The temperature in the converter transformer control cabinet is usually between 30 ℃ and 65 ℃, the ambient temperature is steeply increased when the converter transformer control cabinet is close to a heating air switch, and the actual temperature is only close to 100 ℃, so that the ambient temperature between 0 ℃ and 100 ℃ is only considered; similarly, the present embodiment also considers only the temperature of the object to be measured from 0 ℃ to 150 ℃. And correcting the temperature of the measured object by comparing the temperature measured by the MLX9014AAA non-contact infrared temperature measurement module with the temperature measured by the FLIR infrared imager, wherein the temperature of the measured object is corrected by taking the temperature of the measured object as the reference.
The transmitting terminal 433MHz module and the receiving terminal 433MHz module are both provided with 128 channels, when the channel is a reference channel, the frequency is 433MHz, the channel step is 4KMz, and the operating frequency of the 100 th channel is 473.0 MHz. When signal transmission is needed, the channels between the 433MHz module of the transmitting terminal and the 433MHz module of the receiving terminal are tuned.
The signal gain module of the transmitting end is selected as an XQ-433 bidirectional signal amplification module, the signal gain module of the receiving end is selected as a vertical polarization 433MHz antenna, the XQ-433 bidirectional signal amplification module is connected with an RXD port of the 433MHz module of the transmitting end, and the vertical polarization 433MHz antenna is connected to an SAM seat of the 433MHz module of the receiving end through an IPX/SMA adapter. The XQ-433 bidirectional signal amplification module is connected with a voltage stabilizing module for supplying power to the XQ-433 bidirectional signal amplification module.
The display module is placed in the main control room, the display module is powered by a USB power supply, the display module displays two groups of numbers, wherein T1 is the ambient temperature measured by the probe, namely the temperature in the cabinet, and T2 is the temperature of a detected object detected by the corrected probe, namely the temperature of an opening in the cabinet.
The working conditions and principles of the embodiment are as follows:
when the temperature of the air switch of the converter transformer control cabinet needs to be monitored, the sensor is started to collect the temperature data of the air switch, and the temperature data is collected to the transmitting end control module, the transmitting end control module carries out digital-to-analog conversion processing on the temperature data, then the information is transmitted to the transmitting terminal 433MHz module, the transmitting terminal 433MHz module transmits the signal to the receiving terminal signal gain module through the gain of the transmitting terminal signal gain module, then the receiving end signal gain module gains the received information and transmits the processed information to the receiving end 433MHz module, the receiving end 433MHz module transmits the received data to the receiving end control module, and the digital-to-analog conversion is carried out by the receiving end control module, the information can be displayed in a digital form in the display module, and the on-line monitoring of the air switch temperature of the converter transformer control cabinet is realized.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (6)
1. The utility model provides a change current and become on-line monitoring device of switch board air switch temperature which characterized by: the device comprises a transmitting end and a receiving end, wherein the transmitting end is in signal connection with the receiving end; the transmitting terminal comprises a sensor, a transmitting terminal control module and a transmitting terminal 433MHz module, the sensor is in signal connection with the transmitting terminal control module, and the sensor transmits the acquired temperature data to the transmitting terminal control module;
the transmitting terminal control module is in signal connection with the transmitting terminal 433MHz module, data subjected to digital-to-analog conversion by the transmitting terminal control module are transmitted to the transmitting terminal 433MHz module, and the collected temperature data are sent to the receiving terminal by the transmitting terminal 433MHz module;
the receiving end comprises a receiving end 433MHz module, a receiving end control module and a display module; the receiving terminal 433MHz module is in signal connection with the transmitting terminal 433MHz module, channels of the receiving terminal 433MHz module and the transmitting terminal 433MHz module are adjusted to be consistent, the receiving terminal 433MHz module sends signals received by the transmitting terminal 433MHz module to the receiving terminal control module, digital-to-analog conversion is carried out by the receiving terminal control module, and then data are displayed on the display.
2. The on-line monitoring device for the air switch temperature of the converter transformer control cabinet according to claim 1, which is characterized in that: the transmitting terminal 433MHz module and the receiving terminal 433MHz module are both selected as HC-12433MHz wireless serial port modules, the HC-12433MHz wireless serial port modules need to be subjected to temperature calibration, and the calibration mode is that the environment temperature is directly measured by using an MLX9014AAA non-contact infrared temperature measurement module; and correcting the temperature of the measured object by comparing the temperature measured by the MLX9014AAA non-contact infrared temperature measurement module with the temperature measured by the FLIR infrared imager, wherein the temperature of the measured object is corrected by taking the temperature of the measured object as the reference.
3. The on-line monitoring device for the air switch temperature of the converter transformer control cabinet according to claim 1, which is characterized in that: the transmitter 433MHz module with the receiver 433MHz module both install signal gain module, signal gain module includes vertical polarization 433MHz antenna and XQ-433 two-way signal amplification module, XQ-433 two-way signal amplification module with the transmitter 433MHz module is connected, vertical polarization 433MHz antenna with the receiver 433MHz module is connected.
4. The air switch temperature on-line monitoring device of the converter transformer control cabinet according to claim 4, which is characterized in that: and the XQ-433 bidirectional signal amplification module is connected with a voltage stabilizing module for supplying power to the XQ-433 bidirectional signal amplification module.
5. The on-line monitoring device for the air switch temperature of the converter transformer control cabinet according to claim 1, which is characterized in that: the sensor is an MLX9014AAA non-contact infrared temperature measurement module, and the diameter of a measured hot spot of the MLX9014AAA non-contact infrared temperature measurement module meets the following formula:
D≥Ltan32.5°+5
in the above formula, D is the diameter of the measured hot spot, L is the distance between the measured hot spot and the probe, and the unit is mm.
6. The on-line monitoring device for the air switch temperature of the converter transformer control cabinet according to claim 1, which is characterized in that: the receiving end control module is provided with a plurality of serial ports connected with the sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911254927.7A CN111044155A (en) | 2019-12-10 | 2019-12-10 | Air switch temperature online monitoring device of converter transformer control cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911254927.7A CN111044155A (en) | 2019-12-10 | 2019-12-10 | Air switch temperature online monitoring device of converter transformer control cabinet |
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| CN111044155A true CN111044155A (en) | 2020-04-21 |
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| CN201911254927.7A Pending CN111044155A (en) | 2019-12-10 | 2019-12-10 | Air switch temperature online monitoring device of converter transformer control cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378522A (en) * | 2020-11-16 | 2021-02-19 | 中国南方电网有限责任公司超高压输电公司广州局 | Point distribution method and device for infrared temperature measurement sensor in converter transformer region |
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2019
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| US20080179527A1 (en) * | 2007-01-31 | 2008-07-31 | Demers Joseph R | Pulsed terahertz spectrometer |
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Application publication date: 20200421 |
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