CN205403962U - Transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement - Google Patents
Transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement Download PDFInfo
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- CN205403962U CN205403962U CN201620156923.0U CN201620156923U CN205403962U CN 205403962 U CN205403962 U CN 205403962U CN 201620156923 U CN201620156923 U CN 201620156923U CN 205403962 U CN205403962 U CN 205403962U
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Abstract
The utility model discloses a transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement, including interconnect's infrared temperature measurement system of non -contact and monitoring extension, the monitoring extension still is connected with power module, and the infrared temperature measurement system of non -contact includes interconnect's infrared temperature sensors group and temperature data treater, and the temperature data treater is connected with the monitoring extension. The utility model discloses transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement can replace traditional regular prophylactic test and manual work and patrol and examine, realizes the real -time supervision and the diagnosis of trouble, can advance the concrete position that breaks down and declare in advance and fix a position to troubleshooting has reduced the economic loss that the trouble arouses, very big improvement work efficiency.
Description
Technical field
This utility model belongs to transformer fault on-Line Monitor Device technical field, is specifically related to a kind of pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature.
Background technology
Along with the development of China's power industry, delivery rises year by year, and power transformer also develops to high voltage, Large Copacity direction gradually.Bushing shell for transformer is the device that Transformer Winding is drawn out to outside transformer tank, plays lead-in wire insulation protection effect over the ground and between lead-out wire and fuel tank, is again one of current carrying element, therefore should have the electrical strength of regulation and good heat stability.Transformator is in running, and owing to sleeve pipe can bear the effect of running voltage, load current and the overvoltage in short-term occurred in fault, fault current for a long time, sleeve pipe usually because of deterioration or well damage heating, causes power grid accident.And the fault that casing joint heating causes account for very big ratio in transformer fault, in order to ensure its safe operation, often need sleeve pipe is carried out preventive trial.And sleeve pipe preventive trial must be stopped transport main equipment, operational efficiency and the reliability of equipment can be reduced, and the main equipment because the restriction of the method for operation cannot be stopped transport sometimes, cause that sleeve pipe cannot be carried out regular prerun.
Electrical equipment is carried out uninterrupted power test owing to can realize by live detection work, therefore greatly improves work efficiency, and it is increasingly mature along with detection technique, has been widely used in power system.Existing bushing shell for transformer heating accident detection method is to be patrolled and examined by human at periodic intervals, utilize infrared thermography monitoring sleeve Temperature Distribution, carry out fault diagnosis, it does not reach the effect of on-line real time monitoring, fault anticipation can not be carried out and give warning in advance, often there is the defect being just found after fault occurs.
Utility model content
The purpose of this utility model is to provide a kind of pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature, and solving prior art can not the problem of real time on-line monitoring.
This utility model be employed technical scheme comprise that, pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature, including interconnective Non-contact Infrared Temperature Measurement system and monitoring unit, monitoring unit is also associated with power module, Non-contact Infrared Temperature Measurement system includes interconnective infrared temperature sensor group and temperature data processor, temperature data processor and monitoring unit and connects.
Feature of the present utility model also resides in,
Infrared temperature sensor group includes the infrared temperature sensor being separately mounted to upper and lower two surfaces of pole type transformer A, B, C three-phase sleeve pipe, each infrared temperature sensor is connected with temperature data processor each through shielding line, infrared temperature sensor includes infrared heat sensor, infrared heat sensor is connected to voltage acquisition circuit, temperature-compensation circuit, voltage acquisition circuit, temperature-compensation circuit are also all connected with differential amplifier circuit, differential amplifier circuit is connected with second-order filter circuit, and second-order filter circuit is connected with temperature data processor.
The cut-off frequency of second-order filter circuit is fd=13Hz.
Temperature data processor includes the first microcontroller, and the first microcontroller is connected to multi-channel A/D sample circuit, a RS-485 communication module, and multi-channel A/D sample circuit is connected with infrared sensor, and a RS-485 communication module is connected with monitoring unit.
First microcontroller is also associated with the first display lamp.
First microcontroller is also associated with the first ZigBee module.
Monitoring unit includes the second microcontroller, second microcontroller is connected to the 2nd RS-485 communication module, LCD liquid crystal display screen, DTU module, 2nd RS-485 communication module is connected with temperature data processor, and DTU module is connected with the host computer at background monitoring center.
Second microcontroller is also associated with the second display lamp and buzzer.
Being also associated with the second ZigBee module on second microcontroller, the second ZigBee module is connected with temperature data processor.
Being also associated with super network interface on second microcontroller, super network interface is connected with the host computer at background monitoring center.
The beneficial effects of the utility model are:
1. this utility model is based on the pole type transformer sleeve pipe heating accident in-circuit diagnostic system of infrared measurement of temperature, adopt the infrared temperature sensor being applicable to pole type transformer working environment that bushing temperature is measured, there is good electrical isolation characteristic, avoid the interference of High Voltage electromagnetic field, the heating accident that bushing temperature is reflected has higher power of test, reliability and stability is good, and certainty of measurement is high；
2. this utility model is based on the pole type transformer sleeve pipe heating accident in-circuit diagnostic system of infrared measurement of temperature, the main frame of temperature measurement node and temp measuring system carries out data interaction by RS-485 or ZigBee, which obviate High-Voltage Insulation and strong-electromagnetic field interference problem, further increase the reliability and stability of data communication；
3. this utility model is based on the pole type transformer sleeve pipe heating accident in-circuit diagnostic system of infrared measurement of temperature, traditional periodic preventative test and manual inspection can be substituted, realize monitoring in real time and the diagnosis of fault, the particular location broken down can be carried out anticipation and location in advance, thus fixing a breakdown, decrease the economic loss that fault causes, greatly improve work efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model on-line fault diagnosis system；
Fig. 2 is the structural representation of Non-contact Infrared Temperature Measurement system in this utility model on-line fault diagnosis system；
Fig. 3 is the structural representation of monitoring unit in this utility model on-line fault diagnosis system.
In figure, 1. infrared temperature sensor, 2. temperature data processor, 3. monitoring unit, 4. power module, 5. host computer, 6. infrared heat sensor, 7. voltage acquisition circuit, 8. temperature-compensation circuit, 9. second-order filter circuit, 10. multi-channel A/D sample circuit, 11. the first display lamp, 12. the first microcontroller, 13. the first ZigBee module, 14. a RS-485 communication module, 15. the second ZigBee module, 16. the 2nd RS-485 communication module, 17.DTU module, 18. the second microcontroller, 19. super network interface, 20.LCD LCDs, 21. buzzer, 22. the second display lamp, 23. differential amplifier circuit.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.
This utility model is based on the pole type transformer sleeve pipe heating accident in-circuit diagnostic system of infrared measurement of temperature, as shown in Figure 1, including interconnective Non-contact Infrared Temperature Measurement system and monitoring unit 3, monitoring unit 3 is also associated with power module 4, Non-contact Infrared Temperature Measurement system includes interconnective infrared temperature sensor group and temperature data processor 2, temperature data processor 2 and monitoring unit 3 and connects.
Owing under normal circumstances, the Temperature Distribution of pole type transformer sleeve pipe should follow following 2 principles:
1) pole type transformer A, B, C three-phase bushing temperature distribution ratio is more uniform, it does not have fault-layer-phenomenon.
2) between pole type transformer A, B, C three-phase sleeve pipe the Temperature Distribution of correspondence position each other should ratio more consistent.
Comprehensive above 2 and consideration often occupy very big ratio at transformer fault mesohigh side casing joint heating accident, so when selecting the installation site of infrared temperature sensor 1, we determined that and arranged temperature measurement node on upper and lower two surfaces of high-pressure side A, B, C three-phase sleeve pipe, 6 infrared temperature sensors 1 are installed, namely infrared temperature sensor group includes the infrared temperature sensor 1 that is separately mounted to upper and lower two surfaces of pole type transformer A, B, C three-phase sleeve pipe, and each infrared temperature sensor 1 is connected with temperature data processor 2 each through shielding line.Temperature data processor 2 and monitoring unit 3 are installed in casing or the mounting bracket of pole type transformer, facilitate signal acquisition process and data communication.Wherein, the mounting bracket of infrared temperature sensor 1 is that insulant is made, and is fixed on the insulated sleeve of pole type transformer, and mounting bracket is buckle-type, and infrared temperature sensor is fixed in mounting bracket.
As shown in Figure 2, infrared temperature sensor 1 includes infrared heat sensor 6, infrared heat sensor 6 is connected to voltage acquisition circuit 7, temperature-compensation circuit 8, voltage acquisition circuit 7, temperature-compensation circuit 8 are also all connected with differential amplifier circuit 23, differential amplifier circuit 23 is connected with second-order filter circuit 9, and second-order filter circuit 9 is connected with temperature data processor 2.Infrared heat sensor 6 is divided into two kinds: infrared thermopile sensor and pyroelectric infrared sensor.Owing to we measure Temperature numerical with it, and consider particular job environment residing for bushing shell for transformer, therefore select OTP-538U infrared thermopile sensor.Its temperature-measuring range is :-20 DEG C～130 DEG C, and certainty of measurement is: 1 DEG C, measures distance and is: 3CM.The signal of 1,3 foot outputs of OTP-538U infrared thermopile sensor is the voltage difference sum at its internal multiple cold thermocouple hot terminal two ends, this voltage differential signal realizes gathering and suitable amplification by voltage acquisition circuit 7, and owing to this signal is very little and sensitive with difference variation, so in voltage acquisition circuit designs, the impact of temperature drift factor need to be taken into full account, to reduce measurement error.The cold and hot terminal thermoelectric voltage exported by voltage acquisition circuit 7 is as two ends difference variation and changes, and therefore, need to compensate circuit 8 by the critesistor design temperature that OTP-538U infrared thermopile sensor is built-in.By the ambient temperature compensation voltage superposition that thermoelectric voltage voltage acquisition circuit 7 exported exports with temperature-compensation circuit 8, realize the varying environment temperature-compensating residing for thermocouple cold junction to 0 DEG C, ensure the constant of ambient temperature, the voltage signal that infrared temperature sensor 1 exports only is changed, it is achieved the measurement of temperature with the change of hot junction bushing shell for transformer temperature.Further, since infrared temperature sensor 1 is operated under environment under high pressure, there is signal disturbing, therefore devise second-order filter circuit 9, its cut-off frequency is fd=13Hz, it is ensured that the pure property of output direct current signal.
As shown in Figure 2, temperature data processor 2 includes the first microcontroller 12, first microcontroller 12 is connected to multi-channel A/D sample circuit the 10, the oneth RS-485 communication module the 14, first display lamp the 11, first ZigBee module 13, multi-channel A/D sample circuit 10 is connected with infrared sensor 1, and a RS-485 communication module 14 or the first ZigBee module 13 are connected with monitoring unit 3.
Wherein, that the main control chip in the first microcontroller 12 adopts is STM32F103CBT6, it has 2 12 analog-digital converters, the conversion time of 1 μ S, what the first ZigBee module 13 was selected is Xbee-Pro radio-frequency module, and its power consumption is extremely low, for providing reliable data to transmit between remote equipment, the RS-485 transceiver of the oneth RS-485 communication module 14 is RSM3485CHT, and it has good isolation characteristic, and anti-interference EMI is high for electromagnetism.
The output of infrared temperature sensor 1 is connected to multi-channel A/D sample circuit 10 by shielding line.For ensureing that output signal is in the sampling range of A/D, in the design of multi-channel A/D sample circuit 10, it is the DC offset of 300mV by giving output superposition one amplitude so that it is excursion is in 0～3.3V, in order to carry out A/D sampling on the first microcontroller 12.The signal collected also is calculated and software filtering by the first every 1s 128 data points of sampling of microcontroller 12, and utilizing sectional linear fitting algorithm to realize temperature calibration, the temperature data obtained is sent to monitoring unit 3 by the first ZigBee module 13 or a RS-485 communication module 14.When a failure occurs, the first display lamp 11 glimmers, and is beneficial to the quick looking up the fault position of maintainer.
As shown in Figure 3, monitoring unit 3 includes the second microcontroller 18, second microcontroller 18 is connected to the 2nd RS-485 communication module 16, LCD liquid crystal display screen 20, DTU module the 17, second display lamp 22, buzzer the 21, second ZigBee module 15, super network interface 19,2nd RS-485 communication module 16 or the second ZigBee module 15 are connected with temperature data processor 2, and DTU module 17 or super network interface 19 are connected with the host computer 5 at background monitoring center.
Wherein, that the main control chip in the second microcontroller 18 adopts is STM32F103VET6, and its real-time operation speed is fast, cost performance is high, what DTU module 17 adopted is USR-GM1 module, serial data is converted to IP data, completes wireless data transmission, what super network interface 19 adopted is USR-K3 module, TCP/UDP packet and UART interface mainly realize the transparent transmission of data, and it is equipped with the Cortex-M4 processor of ARM company, low in energy consumption, speed is fast, and stability is high.
2nd RS-485 communication module 16 and the second ZigBee module 15 are for receiving the temperature rise data from Non-contact Infrared Temperature Measurement system, the temperature rise data received are carried out data process and breakdown judge by the second microcontroller 18, and by thermal analysis software algorithm, the concrete abort situation of bushing shell for transformer are accurately positioned.Second microcontroller 18 sends a secondary data by the every 1s of serial ports to LCD liquid crystal display screen 20, LCD liquid crystal display screen 20 can carry out the refreshing of liquid crystal display screen data after receiving data, liquid crystal display screen data are mainly the current failure information of sleeve pipe, such as information such as monitoring location, Current Temperatures, current temperature rise and malfunctions, monitor the duty of sleeve pipe in real time.
When temperature or temperature rise data arrive threshold value of warning, fault status information in LCD liquid crystal display screen 20 will become " fault " from " normally " immediately, and LCD liquid crystal display screen 20 backlight can become redness from white, completing the image early warning of fault, meanwhile, buzzer 21 also can discontinuously send alarm sound, fault is more easy to discovered by staff, and then completing the phonetic warning of fault, the second display lamp 22 glimmers, and completes the light early warning of fault.All of fault information data can be uploaded to the host computer 5 at background monitoring center by DTU module 17 or super network interface 19.
Host computer 5 can monitor the on-line fault diagnosis system on multiple pole type transformer simultaneously, as shown in Figure 1.Further, host computer 5 can realize the setting of threshold value of warning, data collection and the function such as inquiry and Failure elimination.By receiving the fault message from each monitoring unit 3, and set up the temperature of each bushing shell for transformer, temperature rise data and curves, the duty of real-time monitoring sleeve, when early warning information occurs, monitoring personnel can notify that maintenance team is to occurring that the position reported to the police carries out checking and keeps in repair immediately, thus eliminating fault in advance.Host computer 5 also sets up special data base, has utilized the defect of bushing shell for transformer itself design on substantial amounts of data and tailor-made algorithm analytical column, provide theoretical foundation and method for optimizing design.
Claims (10)
1. based on the pole type transformer sleeve pipe heating accident in-circuit diagnostic system of infrared measurement of temperature, it is characterized in that, including interconnective Non-contact Infrared Temperature Measurement system and monitoring unit (3), monitoring unit (3) is also associated with power module (4), Non-contact Infrared Temperature Measurement system includes interconnective infrared temperature sensor group and temperature data processor (2), temperature data processor (2) and monitoring unit (3) and connects.
null2. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 1，It is characterized in that，Described infrared temperature sensor group includes being separately mounted to pole type transformer A、B、C three-phase sleeve pipe upper、The infrared temperature sensor (1) on lower two surfaces，Each infrared temperature sensor (1) is connected with described temperature data processor (2) each through shielding line，Infrared temperature sensor (1) includes infrared heat sensor (6)，Infrared heat sensor (6) is connected to voltage acquisition circuit (7)、Temperature-compensation circuit (8)，Voltage acquisition circuit (7)、Temperature-compensation circuit (8) is also all connected with differential amplifier circuit (23)，Differential amplifier circuit (23) is connected with second-order filter circuit (9)，Second-order filter circuit (9) is connected with described temperature data processor (2).
3. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 2, it is characterised in that the cut-off frequency of described second-order filter circuit (9) is fd=13Hz.
4. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 2, it is characterized in that, described temperature data processor (2) includes the first microcontroller (12), first microcontroller (12) is connected to multi-channel A/D sample circuit (10), a RS-485 communication module (14), multi-channel A/D sample circuit (10) is connected with described infrared sensor (1), and a RS-485 communication module (14) is connected with described monitoring unit (3).
5. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 4, it is characterised in that be also associated with the first display lamp (11) on described first microcontroller (12).
6. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 4, it is characterised in that be also associated with the first ZigBee module (13) on described first microcontroller (12).
7. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 1, it is characterized in that, described monitoring unit (3) includes the second microcontroller (18), second microcontroller (18) is connected to the 2nd RS-485 communication module (16), LCD liquid crystal display screen (20), DTU module (17), 2nd RS-485 communication module (16) is connected with described temperature data processor (2), and DTU module (17) is connected with the host computer (5) at background monitoring center.
8. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 7, it is characterized in that, described second microcontroller (18) is also associated with the second display lamp (22) and buzzer (21).
9. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 7, it is characterized in that, being also associated with the second ZigBee module (15) on described second microcontroller (18), the second ZigBee module (15) is connected with described temperature data processor (2).
10. the pole type transformer sleeve pipe heating accident in-circuit diagnostic system based on infrared measurement of temperature according to claim 7, it is characterized in that, being also associated with super network interface (19) on described second microcontroller (18), super network interface (19) is connected with the host computer (5) at background monitoring center.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620156923.0U CN205403962U (en) | 2016-03-01 | 2016-03-01 | Transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement |
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| CN201620156923.0U CN205403962U (en) | 2016-03-01 | 2016-03-01 | Transformer bushing trouble online diagnosis system of generating heat on post based on infrared temperature measurement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644088A (en) * | 2016-12-19 | 2017-05-10 | 国网山东省电力公司泰安供电公司 | Transformer charged detection system and method based on infrared temperature measurement |
| CN107314817A (en) * | 2017-06-14 | 2017-11-03 | 浙江大华系统工程有限公司 | The diagnostic method and device of a kind of electrical equipment fault |
| CN109324255A (en) * | 2018-11-22 | 2019-02-12 | 深圳供电局有限公司 | Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss |
| CN113091909A (en) * | 2021-03-09 | 2021-07-09 | 郑雪飞 | Transformer temperature on-line measuring system |
-
2016
- 2016-03-01 CN CN201620156923.0U patent/CN205403962U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644088A (en) * | 2016-12-19 | 2017-05-10 | 国网山东省电力公司泰安供电公司 | Transformer charged detection system and method based on infrared temperature measurement |
| CN107314817A (en) * | 2017-06-14 | 2017-11-03 | 浙江大华系统工程有限公司 | The diagnostic method and device of a kind of electrical equipment fault |
| CN109324255A (en) * | 2018-11-22 | 2019-02-12 | 深圳供电局有限公司 | Transformer turn-to-turn short circuit on-line monitoring system and method based on electric energy loss |
| CN113091909A (en) * | 2021-03-09 | 2021-07-09 | 郑雪飞 | Transformer temperature on-line measuring system |
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