CN101576416B - System for monitoring contact temperature of high-voltage switch cabinet on line - Google Patents
System for monitoring contact temperature of high-voltage switch cabinet on line Download PDFInfo
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- CN101576416B CN101576416B CN2009103035514A CN200910303551A CN101576416B CN 101576416 B CN101576416 B CN 101576416B CN 2009103035514 A CN2009103035514 A CN 2009103035514A CN 200910303551 A CN200910303551 A CN 200910303551A CN 101576416 B CN101576416 B CN 101576416B
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Abstract
The invention provides a system for monitoring the contact temperature of a high-voltage switch cabinet on line. The system comprises a repeater, a converter and a local workstation, which are connected in sequence, wherein, the repeater is connected with a plurality of slave monitoring units respectively; and the RS-485 standard is applied to the repeater and the converter respectively. The monitoring system of the invention can monitor the temperature rise value of the contact in the high-voltage switch cabinet on a real-time basis under the conditions of high voltage, high temperature and high magnetic field intensity; by detecting the contact temperature of the high-voltage switch cabinet, the temperature rise value obtained through the comparison between the temperatures of an isolated contact and the high-voltage switch cabinet body can be comprehended on a real-time basis, and a real-time alarm can be triggered, thereby avoiding the power failure caused by the isolated contact which is subjected to excessively high temperature rise or even burnt; and meanwhile, the system of the invention can carry out the following operations on data from each sink node: collection, storage, query and report output.
Description
Technical field
The invention belongs to the power transmission and transformation equipment state monitoring technical field, relate to a kind of system for monitoring contact temperature of high-voltage switch cabinet on line, this system is by detecting contact temperature of high-voltage switch cabinet, understand the temperature rise value that the insulating contact temperature is compared with high-tension switch cabinet body temperature degree in real time, instant alarming, it is too high to avoid occurring the insulating contact temperature rise, even burns, and causes the phenomenon of power failure.
Background technology
At present, generally use the trolley type switch cubicle in the power transmission and transformation system, and connect switch cubicle and isolating switch by plug.If the contact loose contact will cause the contact resistance of contact to increase, contact temperature rises, even can burn contact, causes power transmission and transformation system to have a power failure.This phenomenon is particularly outstanding on high-current switch such as incoming line cabinet, and influence greatly.Be the power transmission and transformation system power outage of avoiding contact temperature rise to cause, need the temperature rise of contact is monitored, in time take appropriate measures, reduce contact temperature.The thermometric of existing contact adopts passive type thermometric and active thermometric.The passive type thermometric is the far infrared wave that penetrates by measured some width of cloth of reception contact, and judges the wavelength of this far infrared wave, determines the temperature of measured point.Its advantage is directly to receive the far infrared wave that measured point sends by the convex lens in the temperature rise monitoring system, and receiver (sensor) can solve high pressure and isolate and the high problem of sensor ambient temperature simple in measurement system structure away from measurement point; Shortcoming is to measure the temperature of the measured point in sensor direct-view scope only, has limited the range of application of this monitoring system.Active thermometric then is a temperature of directly measuring this measurement point by the temperature sensor that is embedded in measured point.Its advantage is that the position of measurement point is unrestricted, and the sensor mounting arrangements is flexible; Shortcoming be sensor under high temperature, highfield and strong magnetic field circumstance condition, it is unreliable to work, and exists high voltage to isolate and the problem of sensor self working power between sensor and the main frame.
Summary of the invention
The purpose of this invention is to provide a kind of system for monitoring contact temperature of high-voltage switch cabinet on line, the variation of monitoring contact temperature of high-voltage switch cabinet in real time, sensor in this system is under high temperature, highfield and strong magnetic field circumstance condition, reliable operation, and mounting arrangements has flexibly solved simultaneously that high voltage between sensor and the main frame is isolated and the problem of sensor self working power.
The technical solution adopted in the present invention is, system for monitoring contact temperature of high-voltage switch cabinet on line comprises the repeater, converter and the local work station that are connected successively, and repeater also is connected with a plurality of monitoring units respectively, repeater adopts RS-485, and converter adopts RS-485.
Feature of the present invention also is,
The structure of monitoring unit comprises: microcontroller is connected with LCD, key-press module, Temperature Humidity Sensor, serial communication interface, wireless receiving module, hummer, pilot lamp and relay respectively, wireless receiving module is connected with 9 radio temperature sensor nodes respectively, and 9 radio temperature sensor nodes are connected with induction power supply respectively.
Microcontroller adopts C8051F020http: //the www.ic37.com/hot/C8051F020.htm single-chip microcomputer.
Wireless receiving module comprises microprocessor, ZigBee physical chip and the antenna that is connected successively, and microprocessor is connected with power module respectively with the ZigBee physical chip.
Microprocessor adopts MC9S08QG8.
The ZigBee physical chip adopts MC13192.
Monitoring system of the present invention has following advantage:
1. the system core adopts microprocessor control, has embedded multiple intelligentized control algolithm, has the incomparable superiority of traditional control method.
2. at the complicacy of applied environment, adopt the design of unique Anti-Jamming Technique and high reliability, make system have the strong and high reliability features of antijamming capability.
3.. the employing modular design can increase easily and deletes various functions, has widened range of application, can be the user and makes to measure.
4. employing Redundancy Design is reserved a plurality of functional interfaces, can carry out the function expansion easily.
5. system design is backward compatible, and follow-up renewal product is the seamless connection of homologous series product in earlier stage, makes things convenient for system upgrade.
6.. system configuration has LCD, carry out numeral demonstration for the part that can numeral shows, for example humiture value, current time.
7. adopt the two-wire data communication of carrying out connected in series, compatible RS485 and RS232 interface.
8. adopt ZigBee radio temperature sensor node, solved high-voltage switch contact and be in the problem that electronic measuring device is difficult to adapt in high voltage, high-temperature, high-intensity magnetic field and the extremely strong electromagnetic interference environment.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of monitoring system of the present invention;
Fig. 2 is the structural representation of monitoring unit in the monitoring system of the present invention;
The structural representation of wireless receiving module in the monitoring system of the present invention of Fig. 3;
Fig. 4 represents the FB(flow block) of monitoring unit in the system of the present invention.
Among the figure, 1. monitoring unit, 2. repeater, 3. converter, 4. local work station, 5. microcontroller, 6. LCD, 7. key-press module, 8. Temperature Humidity Sensor, 9. serial communication interface, 10. wireless receiving module, 11. the radio temperature sensor node, 12. induction power supplies, 13. hummers, 14. pilot lamp, 15. relays, 16. microprocessors, 17.ZigBee physical chip, 18. power modules, 19. antennas.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The structure of a kind of embodiment of monitoring system of the present invention, as shown in Figure 1, comprise the repeater 2, converter 3 and the local work station 4 that connect successively, repeater 2 also is connected with a plurality of monitoring units 1 respectively, repeater 2 adopts the RS-485 repeater, and converter 3 adopts the RS-485 converter.
The structure of monitoring unit 1 in the monitoring system of the present invention, as shown in Figure 2, comprise microcontroller 5, microcontroller 5 is connected with LCD 6, key-press module 7, Temperature Humidity Sensor 8, serial communication interface 9, wireless receiving module 10, hummer 13, pilot lamp 14 and relay 15 respectively, wireless receiving module 10 is connected by wireless mode with 9 radio temperature sensor nodes 11 respectively, and 9 radio temperature sensor nodes 11 are connected with induction power supply 12 respectively.
Include 9 road radio temperature sensor nodes 12 in the one cover monitoring unit 1, finish 9 road contacts, the monitoring of cabinet temperature, 9 road radio temperature sensor nodes 12 wireless receiving module on extension set 10 simultaneously send the information data of gathering, wireless receiving module 10 is sending to microcontroller 5 by serial ports with the information data of gathering, and each road radio temperature sensor node 12 all is the packet that sent 8 bytes every a second, and has only a microcontroller 5 in every suit monitoring unit 1, require the speed of microcontroller 5 very fast, so microcontroller 5 adopts C8051F020http: //8 single-chip microcomputers of the single SoC type of www.ic37.com/hot/C8051F020.htm, its integrated level is very high, has the instruction pipeline structure; The execution time of 70% instruction is one or two system clock cycle, and speed can reach 25MIPS (when clock frequency is 25MHz), and the information that can send radio temperature sensor node 11 is in real time handled.Monitoring unit 1 links to each other with local work station 4 by RS485 or CAN bus.
Wireless receiving module 10 is accepted radio temperature sensor node 11 information transmitted data, and the information data that receives is sent to microcontroller 5, microcontroller 5 is when receiving wireless receiving module 10 input information data, also receive the temperature information of Temperature Humidity Sensor 8 collections that are installed on the high-tension switch cabinet cabinet, two kinds of information that microcontroller 5 will receive are carried out difference operation, calculate the temperature rise value of switch cubicle, and this temperature rise value is shown by LCD 6.Microcontroller 5 also needs this temperature rise value and predefined early warning value and alarming value are compared, when the temperature rise value that calculates is higher than predefined value, microcontroller 5 is by the pilot lamp 14 of relay 15 opening installation on the high-tension switch cabinet cabinet, and open hummer 13, carry out early warning or warning, remind the testing staff to make corresponding measure.
Wireless receiving module 10 has been realized the radio communication between contact temperature monitoring node and the monitoring unit 1, be equivalent to the full-function device (FFD) in the ZigBee network, wireless receiving module 10 vertically is inserted on the main circuit board (because wireless receiving module belongs to high-frequency circuit board, vertically be inserted in and reduce its influence on the main circuit board) main circuit board, its structure as shown in Figure 3, comprise the microprocessor 16, ZigBee physical chip 17 and the antenna 19 that are connected successively, microprocessor 16 is connected with power module 18 respectively with wireless module 17.
Radio temperature sensor node 11 is equivalent to simplify function device (RFD) in the ZigBee network, is made up of wireless module 17, DS18B20 digital temperature sensor and power module 18.
9 road radio temperature sensor nodes 11 and wireless receiving module 10 have been formed a small-sized ZigBee network, this ZigBee network using has the ZigBee protocol stack of reduction function, and its major function comprises initialization, data transmission, Data Receiving, CCA detection, the generation of PHY data structure and the generation of MAC layer data structures etc. of SPI interface read-write operation, ZigBee chip.This ZigBee protocol stack can be formed star network, realizes the data transport functions that this monitoring system is basic.The MC13192 that wireless module 17 adopts has the collision avoidance strategy, has adopted idle channel energy assessment strategy simultaneously, makes monitoring unit 1 in the fixed area that mistake can not take place and receives or do not receive certain phenomenon of the information sent of radio temperature sensor node 11 along separate routes.
DS18B20 digital temperature sensor in the power module 18 is connected with power panel by the high-tension shielding line, and 9 megadyne temperature degree readings are provided, the temperature of the indication device of surveying.The temperature information that records device is sent into this temperature sensor through one-wire interface or is sent from this temperature sensor, only need be connected a line (and) between microprocessor 16 and the DS18B20 digital temperature sensor.The reading and writing of this temperature sensor and finish the required power supply of temperature inversion and provide by data line itself, and do not need external power source, its measurement range is from-55 ℃ to+125 ℃, and increment size is 0.5 ℃.
An EEPROM (Electrically Erasable Programmable Read Only Memo) AT24C02 is arranged in the power module of radio temperature sensor node 11, the address that is used for storing radio temperature sensor node 11, and can repeatedly revise this address.
High-tension switch cabinet operates in the environment of high voltage, big electric current, and the moment that power transmission and transformation system has an accident, strong electromagnetic transient often occurs, all produce highfield, high-intensity magnetic field and strong electromagnetic, be unfavorable for the processing of microelectronics system and feeble signal.Radio temperature sensor node 11 is near contact of breaker, interference for fear of highfield, high-intensity magnetic field and forceful electric power magnetic, 11 casting of radio temperature sensor node are encapsulated in the epoxy resin, utilize the premium properties of high dielectric property, anti-surface leakage and anti-electric arc that epoxy-resin systems has, play good buffer action.DS18B20 temperature sensor in the radio temperature sensor node 11 stretches out from epoxy resin, directly is fixed on the contact arm of contact to be measured, is in same current potential with point for measuring temperature, reduces electric field effects, the quick and precisely temperature variation of induction contact.Be to eliminate influence of random disturbance, utilize contact temperature to change characteristics relatively slowly, the temperature signal of check point is received repeatedly, repeatedly gather, get rid of abnormal data to guarantee the reliable of data.
The program flow diagram of monitoring unit 1, as shown in Figure 4.This flow process is an infinite loop, radio temperature sensor node 11 and Temperature Humidity Sensor 8 are ceaselessly monitored the state of switch cubicle, contact and switch cubicle button, and with the information input microcontroller 5 that monitors, 5 pairs of information that receive of microcontroller are handled, simultaneously, can make microcontroller 5 export various control signals in real time by key-press module 7 to microcontroller 5 input corresponding instruction, remove the house dog counter at last, run well with the affirmation system.
Native system preestablishes warning priority and is higher than early warning priority, is higher than alarming value as long as receive the temperature rise value of contact, all will directly report to the police.After sending early warning or alerting signal (early warning of front panel or alarm lamp flicker), system returns monitoring state and carries out inquiry judging at every turn.Is the temperature that reaches at gateway node lower than predefined early warning or alarming value 2 after carrying out early warning or warning? below, the pilot lamp that is used for early warning or warning just can extinguish, and has prevented that temperature from changing repeatedly and the early warning that causes obtaining or alarm lamp disorderly dodge.
The course of work of monitoring system of the present invention:
The compatible several operation systems of this monitoring system, can be in high voltage, high-temperature and strong magnetic field circumstance, temperature rise value to the high-tension switch cabinet contact is monitored in real time, finishes collection, storage, inquiry and the report output of each aggregation node data, supports user's secondary development easily.
Claims (4)
1. system for monitoring contact temperature of high-voltage switch cabinet on line, it is characterized in that, this monitoring system comprises repeater (2), converter (3) and the local work station (4) that is connected successively, repeater (2) also is connected with a plurality of monitoring units (1) respectively, repeater (2) adopts RS-485, and converter (3) adopts RS-485; The structure of described monitoring unit (1) comprising: microcontroller (5) is connected with LCD (6), key-press module (7), Temperature Humidity Sensor (8), serial communication interface (9), wireless receiving module (10), hummer (13), pilot lamp (14) and relay (15) respectively, wireless receiving module (10) is connected with 9 radio temperature sensor nodes (11) respectively, and 9 radio temperature sensor nodes (11) are connected with induction power supply (12) respectively; Described wireless receiving module (10) comprises microprocessor (16), ZigBee physical chip (17) and the antenna (19) that is connected successively, and microprocessor (16) is connected with power module (18) respectively with ZigBee physical chip (17).
2. according to the described monitoring system of claim 1, it is characterized in that described microcontroller (5) adopts the C8051F020 single-chip microcomputer.
3. according to the described monitoring system of claim 1, it is characterized in that described microprocessor (16) adopts MC9S08QG8.
4. according to the described monitoring system of claim 1, it is characterized in that described ZigBee physical chip (17) adopts MC13192.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103035514A CN101576416B (en) | 2009-06-23 | 2009-06-23 | System for monitoring contact temperature of high-voltage switch cabinet on line |
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| CN2009103035514A CN101576416B (en) | 2009-06-23 | 2009-06-23 | System for monitoring contact temperature of high-voltage switch cabinet on line |
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| CN101576416B true CN101576416B (en) | 2011-02-02 |
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| CN102403789A (en) * | 2011-05-31 | 2012-04-04 | 镇江泰丰电工设备制造有限公司 | Remote monitoring high-voltage switch cabinet |
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| CN105758541A (en) * | 2016-04-28 | 2016-07-13 | 厦门理工学院 | Medium- and high-voltage switch cabinet temperature on-line monitoring device |
| CN107783450A (en) * | 2016-08-27 | 2018-03-09 | 江苏德驰电气有限公司 | A kind of system for monitoring contact temperature of high-voltage switch cabinet on line |
| CN107782990A (en) * | 2016-08-27 | 2018-03-09 | 江苏德驰电气有限公司 | A kind of HV switchboard online detection system based on Internet of Things |
| CN106768353A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of monitoring system for isolation switch contact temperature |
| CN107014508B (en) * | 2017-04-10 | 2020-02-11 | 北京德威特电气科技股份有限公司 | Temperature detection method and device, storage medium and processor |
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| CN110567599A (en) * | 2018-06-06 | 2019-12-13 | 中国石油化工股份有限公司 | wireless temperature measuring device of switch cabinet based on 2.4G communication frequency |
| CN113551804A (en) * | 2020-04-03 | 2021-10-26 | 首瑞（天津）电气设备有限公司 | Switch integrated system |
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Address after: 324100 Zhejiang province Jiangshan City Qing Hu Zhen Village intersection 198-4 junctions Patentee after: Zhejiang era electrical Polytron Technologies Inc Address before: Jiangshan City, Zhejiang province 324100 Quzhou City Road No. 198 Qing Hu Zhen Village intersection Patentee before: ZHEJIANG JIYUAN TRANSFORMER CO., LTD. |
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Effective date of registration: 20200818 Address after: No.39 Jiangbin Road, Jiangshan City, Quzhou City, Zhejiang Province Patentee after: Qiu Chenchen Address before: 324100 Zhejiang province Jiangshan City Qing Hu Zhen Village intersection 198-4 junctions Patentee before: ZHEJIANG SINOERA ELECTRONICS TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20201116 Address after: No.2 Longshan Road, Qinghu street, Jiangshan City, Quzhou City, Zhejiang Province Patentee after: Juyuan intelligent electric (Zhejiang) Co., Ltd Address before: No.39 Jiangbin Road, Jiangshan City, Quzhou City, Zhejiang Province Patentee before: Qiu Chenchen |