CN203745083U - High-voltage isolating switch contact temperature monitoring system based on zigbee network - Google Patents
High-voltage isolating switch contact temperature monitoring system based on zigbee network Download PDFInfo
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- CN203745083U CN203745083U CN201420130133.6U CN201420130133U CN203745083U CN 203745083 U CN203745083 U CN 203745083U CN 201420130133 U CN201420130133 U CN 201420130133U CN 203745083 U CN203745083 U CN 203745083U
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Abstract
The utility model relates to a high-voltage isolating switch contact temperature monitoring system based on a zigbee network. The system is composed of infrared temperature acquisition points, switch cabinet detection units, a zigbee wireless network and upper computers. The system is characterized in that each infrared temperature acquisition point is internally inlaid with an infrared temperature sensor, a voltage frequency conversion circuit and an installing accessory. The infrared temperature acquisition points are installed in a way of being aligned with small bus bars on the rear side of a main contact of a switch cabinet with maintenance of vertical irradiation. The infrared temperature acquisition points and the switch cabinet detection units are connected by adopting wiring. The switch cabinet detection units are internally inlaid with zigbee modules. The switch cabinet detection units are connected in a wireless data communication way, and the upper computers are connected in the wireless data communication way. The system is a non-contact temperature-measuring device, non-contact type online monitoring is performed on temperature of a high-voltage isolating switch contact via the infrared sensors, and database management is performed on temperature by adopting zigbee technological networking so that hardware structure of the system is simple, cost is relatively low, and work operation is stable with great practical value on enhancing operation reliability of the high-voltage switch cabinet and even an electric power system.
Description
Technical field
The utility model relates to a kind of temperature monitoring system, particularly relates to a kind of high voltage isolation switch contact temperature monitoring system based on zigbee network, belongs to a kind of safety guard of electric system.
Background technology
In electric system, have a large amount of high voltage isolators, various electrical equipments often need to be used in conjunction with disconnector.The contact of high voltage isolator is partly its key position, and the working condition of contact directly has influence on the security of electrical network.The failure procedure of contact is the process that contact resistance constantly increases, and in this process, the temperature of contact constantly raises, and fever phenomenon is serious, has further strengthened the contact resistance of contact.So to the contact temperature real time and on line monitoring of high voltage isolator cabinet very important just.
According to the safe insulation request of electric system, on the contact of high voltage isolator, be not suitable for settling any sensor, this has caused certain difficulty to the collection of temperature data.Meanwhile, the working environment of high-tension switch gear in high voltage, large electric current, high-intensity magnetic field, causes greatly to various pick-up units and disturb, and has a strong impact on measurement accuracy.Every high voltage isolator has six contacts, and a large amount of temperature datas also needs networking to be uploaded to computing machine building database after treatment, and this has just proposed again the requirement of intelligent data management.
If design the good contactless contact temperature detection hardware circuit of anti-interference, and create the temperature online monitoring system based on zigbee LAN.The labour intensity that will significantly reduce operator also can reduce the generation of potential safety hazard, believes that this is also the inexorable trend of following this type of equipment development.
Current a lot of electric substations adopt manual patrol, and way is that each pastes 80 ℃ of temperature-indicating wax labels about position in galvanic circle, often monitors its fusing situation; When abrupt change of climate, also should carry out spy patrols.Once find overheated situation, should take immediate steps, reduce load current, prevent that further heating causes the accident, the mode complex operation of this manual inspection, easily produces misoperation.
Traditional thermometric mode is contact type measurement, is not suitable under high voltage, large electric current environment and works.In recent years, in some electric substations with good conditionsi, can adopt temperature measurer to carry out measuring temperature in charged mode, and because it is expensive and need manual operation, also be not suitable for on-line monitoring and robotization and control.And other measuring method or because complex structure cost is higher, or because functional reliability is lower, could not be at production scene spread.
Summary of the invention
The purpose of this utility model is to provide a kind of high voltage isolation switch contact temperature monitoring system based on zigbee network, it is non-contact temperature measuring device,, by infrared sensor, high voltage isolation switch contact temperature is carried out to contactless on-line monitoring, and adopt Zigbee-technology networking, temperature is carried out to data base administration, its hardware configuration is simple, cost is lower, it is stable to work, and to improving the operational reliability of high-tension switch cabinet and even electric system, has very large practical value.
The technical solution of the utility model is achieved in that a kind of high voltage isolation switch contact temperature monitoring system based on zigbee network, by infrared temperature collection point, switch cubicle detecting unit and zigbee wireless network and host computer, formed, it is characterized in that: each embedded infrared temperature sensor in infrared temperature collection point, voltage-frequency conversion circuit, installation fitting; Install infrared temperature collection point should aim at the little busbar of switch cabinet main contact rear side, and keeps vertical irradiation, and infrared temperature collection point adopts distribution to be connected with switch cubicle detecting unit; The embedded zigbee module of switch cubicle detecting unit, is connected for wireless data communication between switch cubicle detecting unit with between host computer.
The low-pass filtering that described voltage-frequency conversion circuit external voltage consists of R1, C1 is sent to 7 pins of chip, and 3 pins are output, and a pull-up resistor R5 in parallel after drawing on again by R6 through photoelectric isolating device U2 sends signal.1,6 pin is connected and connects after C6, R2 access in analog; 2 pins access in analog after connecting with resistance R 4 and potentiometer HRVA1.5 pins are a charging circuit being comprised of R3, C7; 8,4 pins connect respectively operating voltage and ground.
Good effect of the present utility model is as follows: for the performance of checking system, carried out proofreading and correct and comparison test in laboratory.Contact power-off after heating power is stable, in the process reducing at contact temperature, measure temperature, employing resolution is that the temperature that the mercury temperature of 1 ℃ measures is standard temperature, records the temperature of infrared temperature sensor actual measurement simultaneously, and one group of data of experimental result are in Table 1.Test result analysis: 1 can find out from table 1, and the error of system, in ± 1.5 ℃, meets the re-set target of design, also realistic demand, can be applied to high voltage switch cabinet fault and report to the police; Still there is certain error in 2 observed temperatures and standard temperature, this is relevant with factors such as infrared temperature sensor itself and costs, but this error is all within allowed band.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present utility model.
Fig. 2 is high precision voltage-frequency conversion circuit.
Fig. 3 is infrared temperature collection point monnolithic case figure
Fig. 4 is detecting unit controller hardware block diagram.
Embodiment
Below the utility model will be further described: as shown in Figure 1, a kind of high voltage isolation switch contact temperature monitoring system based on zigbee network, by infrared temperature collection point, switch cubicle detecting unit and zigbee wireless network and host computer, formed, it is characterized in that: each infrared temperature collection point is embedded infrared temperature sensor, voltage-frequency conversion circuit, installation fitting as shown in Figure 3; Install infrared temperature collection point should aim at the little busbar of switch cabinet main contact rear side, and keeps vertical irradiation, and infrared temperature collection point adopts distribution to be connected with switch cubicle detecting unit; The embedded zigbee module of switch cubicle detecting unit, is connected for wireless data communication between switch cubicle detecting unit with between host computer.
Infrared temperature collection point is to irradiate main contact by temperature probe, pops one's head in as infrared temperature sensor.As shown in Figure 2, the voltage-frequency conversion circuit in infrared temperature collection point, has adopted the integrated voltage-frequency conversion chip of high precision to realize in design.At respective pin access charge-discharge circuit, in just exportable suitable frequency of output pin.The periphery that is this circuit forms.Wherein the connection of each pin components and parts is that typical circuit connects, the low-pass filtering that its external voltage consists of R1, C1 is sent to 7 pins of chip, 3 pins are output, and a pull-up resistor R5 in parallel after drawing on again by R6 through photoelectric isolating device U2 sends signal.1,6 pin is connected and connects after C6, R2 access in analog; 2 pins access in analog after connecting with resistance R 4 and potentiometer HRVA1.5 pins are a charging circuit being comprised of R3, C7; 8,4 pins connect respectively operating voltage and ground.This circuit linearity is better, do not need amplifier just can realize electric voltage frequency conversion, and conversion precision is high.
?the Main Function of infrared temperature collection point is realized non-contact temperature measuring exactly, and temperature signal is converted to the frequency signal of strong interference immunity, by line, sends switch cubicle detecting unit to.Switch cubicle detecting unit data acquisition and packing are processed, the functions such as system operating mode arranges, and realize on-the-spot demonstration, sound and light alarm by liquid crystal display, upper seat in the plane system has data management function, can show the historical temperature variation curve of each point for measuring temperature and log history pre-alarm state, the main devices of infrared temperature collection point is exactly infrared temperature sensor, it is a kind of temperature sensor that utilizes principle of infrared radiation to make, the infrared light of usining transmits temperature as medium, indirectly measures the temperature of testee.At present, this non-contact temperature measuring method is comparative maturity aspect the online fever monitoring of power equipment, is applicable to the working environment of high voltage, high-intensity magnetic field, and temperature-measuring range is wide, and error is little, meets disconnector temperature monitoring demand completely.Realize high-tension apparatus on-line monitoring, first to solve high pressure, the interference problem of large electric current, in temperature data acquisition, the utility model adopts voltage-frequency conversion circuit and after light-coupled isolation, carries out just now signal transmission, and it has the features such as simple in structure, antijamming capability strong, reliable operation.
As shown in Figure 4, switch cubicle detecting unit is the core of monitoring system, its adopts AVR single chip computer AT MEGA128L that performance is higher as controller, it is high-performance, low-power consumption microprocessor, internal resource is abundant, without peripheral circuit expansion, just can complete the functions such as keyboard, demonstration, time and environment temperature record, sound and light alarm and serial communication.Switch cubicle detecting unit selects 128 * 64 lattice lcds to show as operation interface, and Chinese character shows, intuitive and convenient.In concrete practical application, detecting unit can be thrown off host computer data are sent to the whole insurance system of electric substation with electric system standard CD T stipulations form.User's use that this is more convenient.
In data transfer mode, adopt the new technology Zigbee-technology of wireless sensor network, each switch cubicle detecting unit inside is with a zigbee module, module is by the wireless connections each other of a plurality of switch cubicle detecting units whereby, and to master system, provide data in time, thereby provide digital information to realize intelligent management for remote monitoring.ZigBee technology has unrivaled application advantage at low-power consumption, low cost and networking capability.Adopt after Zigbee-technology, without any line, just each switch cubicle detecting unit can be coupled together, occasion at high-voltage great-current, this greatly reduces Conduction Interference undoubtedly, for the stability that improves system, play positive role, reduced the workload of on-the-spot installation simultaneously, saved cost.Zigbee module adopts the technical implementation way that merges SIM cards of mobile phones based on RFID 2.4GHz frequency, compatible 13.56MHz frequency application mode.Relevant heat transfer agent is collected and processed to wireless zigbee network, and by forwarding, cooperation realizes communication and the resource sharing between each switch cubicle detecting unit, and then realizes communicating by letter and accessing transmission network with multi-hop mode and host computer.
In temperature online monitoring system due to many slave computers of an ipc monitor, so ipc monitor interface mainly comprises 3: 1. main monitoring interface, the state that can monitor slave computer is (normal, fault), consider versatility, the number of units of slave computer can be added according to actual needs or delete, and system default is 50; 2. slave computer operation monitoring and control interface, be mainly that a certain high-tension switch cabinet carried out to status surveillance, comprises each phase running status, temperature variation curve and data sheet etc.; 3. slave computer inner parameter is set interface, can to the early-warning parameters of certain high-tension switch cabinet, modify according to actual needs.
High-tension switch cabinet operates in the state of high voltage, large electric current, and strong electromagnetic transient also appears in systematic failures moment, and these highfields, magnetic field and strong electromagnetic, can produce severe jamming to microelectronics system.For eliminating these, disturb, on hardware, adopt metallic shield, strengthen filtering at different levels and eliminate high frequency interference.In order to eliminate random disturbance, utilize contact temperature to change feature relatively slowly in addition, to check point signal multi collect, get rid of abnormal data reliable to guarantee data, by above aggregate measures, complete machine has had good anti-interference.
Claims (2)
1. the high voltage isolation switch contact temperature monitoring system based on zigbee network, by infrared temperature collection point, switch cubicle detecting unit and zigbee wireless network and host computer, formed, it is characterized in that: each embedded infrared temperature sensor in infrared temperature collection point, voltage-frequency conversion circuit, installation fitting; Install infrared temperature collection point should aim at the little busbar of switch cabinet main contact rear side, and keeps vertical irradiation, and infrared temperature collection point adopts distribution to be connected with switch cubicle detecting unit; The embedded zigbee module of switch cubicle detecting unit, is connected for wireless data communication between switch cubicle detecting unit with between host computer.
2. according to a kind of high voltage isolation switch contact temperature monitoring system based on zigbee network described in claim 1, it is characterized in that described voltage-frequency conversion circuit external voltage is sent to 7 pins of chip by the low-pass filtering of R1, C1 composition, 3 pins are output, a pull-up resistor R5 in parallel, after drawing on again sends signal through photoelectric isolating device U2 by R6; 1,6 pin is connected and connects after C6, R2 access in analog; 2 pins access in analog after connecting with resistance R 4 and potentiometer HRVA1; 5 pins are a charging circuit being comprised of R3, C7; 8,4 pins connect respectively operating voltage and ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420130133.6U CN203745083U (en) | 2014-03-21 | 2014-03-21 | High-voltage isolating switch contact temperature monitoring system based on zigbee network |
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| CN201420130133.6U CN203745083U (en) | 2014-03-21 | 2014-03-21 | High-voltage isolating switch contact temperature monitoring system based on zigbee network |
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| CN203745083U true CN203745083U (en) | 2014-07-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277782A (en) * | 2015-10-19 | 2016-01-27 | 陕西宝成航空仪表有限责任公司 | Novel voltage frequency conversion sampling device and work method thereof |
| CN105352607A (en) * | 2015-12-07 | 2016-02-24 | 浪潮集团有限公司 | Infrared temperature measurement of electric power system and auto-power-off device based on STM32 singlechip |
| 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 |
| CN108804293A (en) * | 2018-06-27 | 2018-11-13 | 郑州云海信息技术有限公司 | A kind of server and its contactless storage device temperature monitoring device |
| CN110244200A (en) * | 2019-05-22 | 2019-09-17 | 国家电网有限公司 | A kind of simulation system and its method of energization rotating structural elements fusing process |
-
2014
- 2014-03-21 CN CN201420130133.6U patent/CN203745083U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277782A (en) * | 2015-10-19 | 2016-01-27 | 陕西宝成航空仪表有限责任公司 | Novel voltage frequency conversion sampling device and work method thereof |
| CN105352607A (en) * | 2015-12-07 | 2016-02-24 | 浪潮集团有限公司 | Infrared temperature measurement of electric power system and auto-power-off device based on STM32 singlechip |
| 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 |
| CN108804293A (en) * | 2018-06-27 | 2018-11-13 | 郑州云海信息技术有限公司 | A kind of server and its contactless storage device temperature monitoring device |
| CN110244200A (en) * | 2019-05-22 | 2019-09-17 | 国家电网有限公司 | A kind of simulation system and its method of energization rotating structural elements fusing process |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20150321 |
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| EXPY | Termination of patent right or utility model |