CN105318978A - Wireless temperature measurement system of transformer temperature rise test - Google Patents
Wireless temperature measurement system of transformer temperature rise test Download PDFInfo
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- CN105318978A CN105318978A CN201410348389.9A CN201410348389A CN105318978A CN 105318978 A CN105318978 A CN 105318978A CN 201410348389 A CN201410348389 A CN 201410348389A CN 105318978 A CN105318978 A CN 105318978A
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Abstract
The invention discloses a wireless temperature measurement system of transformer temperature rise test. The system comprises wireless temperature measuring sensors, a wireless gateway device and a monitoring host; according to different monitoring points of a transformer, the wireless temperature measuring sensors include oil level temperature measuring sensors, environment temperature measuring sensors and transformer surface temperature measuring sensors of either oil-immersed or surface-mounted structure, the temperature of the different monitoring points is monitored accurately in real time in transformer temperature rise test, and temperature data is transmitted to the wireless gateway device via RF signals; the wireless gateway device transmits the received wireless temperature measuring data to the monitoring host; and the monitoring host runs temperature monitoring software to record, store and display the temperature in the test process, calculates and analyzes the temperature values, and obtains a test result. According to the invention, a WIA industrial wireless communication technology of high communication performance in the complex electromagnetic environment is used to form the distributed wireless temperature measuring system, the working efficiency and accuracy of transformer temperature rise test are greatly improved, and the system is conducive to realize automation of the transformer temperature rise test.
Description
Technical field
The present invention relates to a kind of wireless temperature measurement system, specifically a kind of wireless temperature measurement system of transformer temperature rise test.
Background technology
Temperature rise test is one of important type approval test of transformer, is the test that in all type approval tests of transformer and routine test project, holding time is the longest.The detection of temperature rise test is to the q&r important role of transformer.
But in traditional temperature rise test process, what temperature survey adopted is wired mode, arrange that testing ground needs several hours, input manpower is many, and workload is large, and efficiency is low, often occur in process of the test causing loss of data phenomenon because cable contact is bad, searching circuit wastes time and energy; In addition, existing temp measuring system is comparatively simple, just there is reading to show and simply record and printing function, staff needs to keep before monitoring equipment at duration of test (about 12 ~ 24 hours) always, process of the test is quite dull uninteresting, working strength is large, easily makes staff tired thus causes the result accuracy of temperature rise test on the low side.
Summary of the invention
For the problems referred to above of the prior art, propose a kind of wireless temperature measurement system of transformer temperature rise test, it implements simple, easy for installation, the real-time follow-up record of monitoring of software realization to temperature rise test overall process on monitoring main frame can also be coordinated, and computational analysis is carried out to temperature data, draw test findings, substantially increase work efficiency and the accuracy of transformer temperature rise test.
The technical scheme that the present invention is adopted for achieving the above object is: a kind of transformer temperature rise test wireless temperature measurement system, comprising:
Wireless temperature-measuring sensor, for the temperature of the oil surface temperature of measuring transformer, environment temperature, heating radiator import and export temperature, oil tank wall and cannula connection local hot spot, and send by radio frequency signal the temperature data collected to wireless network shutdown;
Wireless network shuts down, and for collecting the temperature data of each wireless temperature-measuring sensor, and sends data to monitoring main frame;
Monitoring main frame, stores for carrying out record to the temperature data of each monitoring point in temperature rise test process, the curve that real-time displays temperature data are formed, and adopts regression analysis to carry out computational analysis to temperature data, draw result of calculation.
Described wireless temperature-measuring sensor comprises temperature sensor module, wireless communication module, power supply and built-in aerial; Described temperature sensor module is connected with described wireless communication module, and described wireless communication module connects described built-in aerial, and described power supply connects described temperature sensor module and wireless communication module.
Described temperature sensor module adopts the one-line digital temperature sensor of DS18B20.
Described wireless communication module is operated in 433Mhz frequency range.
Described power supply is the high temperature high power lithium battery that normally can work under 130 DEG C of high temperature.
Described is oil immersed type wireless temperature-measuring sensor and/or surface-mount type wireless temperature-measuring sensor;
The temperature sensor of described oil immersed type wireless temperature-measuring sensor is placed in the temperature probe inside of strip, by the tested oil temperature of highly heat-conductive material shell perception of temperature probe, be connected by coupling arrangement between temperature probe with wireless communication module, wireless communication module is built-in with power supply and built-in aerial;
The temperature sensor module of described surface-mount type wireless temperature-measuring sensor, wireless communication module, power supply and built-in aerial are placed in the housing of a bottom flat, are the magnetic heat conduction egative film of band, for being directly adsorbed on the monitoring point place of transformer in described bottom.
Ethernet interface is supported in the shutdown of described wireless network, or RS-232 interface, or USB interface and monitoring main-machine communication.
Adopt multi-hop ad hoc networking between described wireless network shutdown and multiple temperature probe, form WIA wireless industrial network.
Described monitoring main frame comprises image display module, parameter setting module, data memory module and data processing module; Described data processing module connects described data memory module and described image display module, and described data memory module also connects described image display module and described parameter setting module.
The present invention has the following advantages and beneficial effect:
1. full Wireless structural design, devises oil immersed type and surface-mount type two kinds of wireless temperature-measuring sensor structures for the monitoring point that transformer is different, and install simple, measure convenient, flexible, cost is low, avoids the problems such as wiring cost is high, workload is large, efficiency is low.
2. native system adopts the mode of wireless telecommunications, eliminating temperature probe connecting line to measuring the impact produced, making measuring tempeature accurate stable.
3. coordinate temperature monitoring software simulating to the real-time follow-up record of temperature rise test overall process, and computational analysis is carried out to temperature data, draw test findings, support automatically to generate test report and the multiple transformer date comprision of same model, powerful, provide favourable conditions for realizing the robotization of transformer temperature rise test.
4. radio communication adopts the WIA wireless industrial mechanics of communication under complex electromagnetic environment with good communication performance, ensure that the reliability of communication.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of the embodiment of the present invention;
Fig. 2 is the composition frame chart of wireless temperature-measuring sensor in the embodiment of the present invention;
Fig. 3 a is the structural representation of oil immersed type wireless temperature-measuring sensor in the embodiment of the present invention;
Fig. 3 b is the structural representation of surface-mount type wireless temperature-measuring sensor in the embodiment of the present invention;
Fig. 4 is the scheme of installation of oil immersed type wireless temperature-measuring sensor in the embodiment of the present invention;
Fig. 5 is the temperature monitoring system composition frame chart of monitoring in the embodiment of the present invention in main frame.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Figure 1 shows that the general structure schematic diagram of system, comprise wireless temperature-measuring sensor, wireless network shutdown and monitoring main frame.Wireless temperature-measuring sensor is arranged on transformer test scene, for the temperature of each monitoring point of measuring transformer, wireless temperature-measuring sensor itself has route and self organizing function simultaneously, forms " grid " type network, send the temperature data of measurement to gateway with radio network gateway machine; Wireless network shutdown and monitoring main frame are arranged in pulpit, and by too network interface, or RS-232 interface, or USB interface is connected, and realize showing in real time the temperature of each monitoring point in temperature rise test process, record, store also computational analysis.
Figure 2 shows that the composition structure of wireless temperature-measuring sensor, comprise temperature sensor module, wireless communication module, power supply and built-in aerial.Wireless temperature-measuring sensor is operated in 433Mhz frequency range, and adopt service intermittent mode, power consumption is extremely low, and quiescent current is less than 1 microampere, and when frequency acquisition is 1 minute, the lithium battery of single-unit 1000mAh can work more than 5 years.Wireless temperature-measuring sensor also supports online configuration feature, can remotely modifying temperature acquisition frequency.
For the difference monitoring position of transformer, wireless temperature-measuring sensor is divided into pasta temperature probe, environment temperature probe and surface temperature measurement sensor three kinds, wherein, if the temperature of surface temperature measurement sensor main to heating radiator import and export and oil tank wall and cannula connection local hot spot is measured.In actual tests, pasta temperature probe and environment temperature probe need to be immersed in oil and detect, surface temperature measurement sensor then needs to carry out direct-detection to transformer surface, so wireless temperature-measuring sensor is designed to oil immersed type and surface-mount type two kinds of structures, as shown in Figure 3.
As shown in Figure 3 a, oil immersed type wireless temperature-measuring sensor is by temperature probe, and coupling arrangement and wireless communication module form.Temperature sensor is in temperature probe, by the tested oil temperature of highly heat-conductive material shell perception of probe, adopts coupling arrangement transition to be connected, also comprise lithium battery and built-in aerial in wireless communication module between temperature probe with wireless communication module.When measuring oil surface temperature, only temperature probe need be immersed in the oil in transformer oil surface thermometer seat, as shown in Figure 4.The measurement of environment temperature uses lubricating cup oiling, and then immersed by sensor and detect, method is identical therewith.
As shown in Figure 3 b, the magnetic egative film of surface-mount type wireless temperature-measuring sensor band, directly can be adsorbed on the monitoring point place of transformer, flexibly easy for installation, simultaneously egative film is very thin and have high-termal conductivity, makes built-in temperature sensor can by the temperature of its perception measured point.In humid test, heating radiator import and export temperature detection loca is relatively fixing, and the position of local hot spot is unfixed, needs 1 hours after on-test, first find out the position whether having temperature higher with infrared thermometer, then temperature probe is installed to this place and monitors.
The temperature monitoring system that monitoring main frame runs comprises image display module, parameter setting module, data memory module and data processing module, as shown in Figure 5.Image display module mainly realizes the real-time curve tracking display of each monitoring point in temperature rise test process, data sheet display and historical data curve map and report display; Parameter setting module mainly realizes the test parameters setting that user carries out some necessity, comprises transformer model, voltage, current transformer correlation parameter, temperature data acquisition frequency etc., and is saved in data memory module; Data memory module mainly realizes the storage of configuration parameter and the function such as the storage of image data and inquiry; Data processing module is the core of temperature monitoring software, and the main regression analysis that adopts carries out computational analysis to temperature data, draws temperature rise test result, and is shown by image display module, automatically can also generate test report simultaneously.
More than in conjunction with most preferred embodiment, invention has been described, but the present invention is not limited to the embodiment of above announcement, and should contain various carry out according to essence of the present invention amendment, equivalent combinations.
Claims (9)
1. a transformer temperature rise test wireless temperature measurement system, is characterized in that, comprising:
Wireless temperature-measuring sensor, for the temperature of the oil surface temperature of measuring transformer, environment temperature, heating radiator import and export temperature, oil tank wall and cannula connection local hot spot, and send by radio frequency signal the temperature data collected to wireless network shutdown;
Wireless network shuts down, and for collecting the temperature data of each wireless temperature-measuring sensor, and sends data to monitoring main frame;
Monitoring main frame, stores for carrying out record to the temperature data of each monitoring point in temperature rise test process, the curve that real-time displays temperature data are formed, and adopts regression analysis to carry out computational analysis to temperature data, draw result of calculation.
2. a kind of transformer temperature rise test wireless temperature measurement system according to claim 1, it is characterized in that, described wireless temperature-measuring sensor comprises temperature sensor module, wireless communication module, power supply and built-in aerial; Described temperature sensor module is connected with described wireless communication module, and described wireless communication module connects described built-in aerial, and described power supply connects described temperature sensor module and wireless communication module.
3. a kind of transformer temperature rise test wireless temperature measurement system according to claim 2, is characterized in that, described temperature sensor module adopts the one-line digital temperature sensor of DS18B20.
4. a kind of transformer temperature rise test wireless temperature measurement system according to claim 2, it is characterized in that, described wireless communication module is operated in 433Mhz frequency range.
5. a kind of transformer temperature rise test wireless temperature measurement system according to claim 2, is characterized in that, described power supply is the high temperature high power lithium battery that normally can work under 130 DEG C of high temperature.
6. a kind of transformer temperature rise test wireless temperature measurement system according to claim 2, is characterized in that, described is oil immersed type wireless temperature-measuring sensor and/or surface-mount type wireless temperature-measuring sensor;
The temperature sensor of described oil immersed type wireless temperature-measuring sensor is placed in temperature probe (1) inside of strip, by the tested oil temperature of highly heat-conductive material shell perception of temperature probe (1), temperature probe (1) is connected by coupling arrangement (2) with between wireless communication module, and wireless communication module is built-in with power supply and built-in aerial;
The temperature sensor module of described surface-mount type wireless temperature-measuring sensor, wireless communication module, power supply and built-in aerial are placed in the housing of a bottom flat, in described bottom for being with magnetic heat conduction egative film (4), for being directly adsorbed on the monitoring point place of transformer.
7. a kind of transformer temperature rise test wireless temperature measurement system according to claim 1, is characterized in that, Ethernet interface is supported in the shutdown of described wireless network, or RS-232 interface, or USB interface and monitoring main-machine communication.
8. a kind of transformer temperature rise test wireless temperature measurement system according to claim 1, is characterized in that, adopts multi-hop ad hoc networking between described wireless network shutdown and multiple temperature probe, forms WIA wireless industrial network.
9. a kind of transformer temperature rise test wireless temperature measurement system according to claim 1, it is characterized in that, described monitoring main frame comprises image display module, parameter setting module, data memory module and data processing module; Described data processing module connects described data memory module and described image display module, and described data memory module also connects described image display module and described parameter setting module.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107505521A (en) * | 2017-08-10 | 2017-12-22 | 中国科学院上海高等研究院 | The passive and wireless temperature rise sensor and detection method for temperature rise of a kind of power distribution network transformer |
| CN107589329A (en) * | 2017-10-10 | 2018-01-16 | 国网辽宁省电力有限公司鞍山供电公司 | It is a kind of to have distribution transformer operation detector and the method that pulling temperature electric current compares |
| CN108534908A (en) * | 2018-03-23 | 2018-09-14 | 国网河北省电力有限公司电力科学研究院 | Transformer oil surface temperature sensor |
| CN109406002A (en) * | 2017-08-18 | 2019-03-01 | 中国电力科学研究院 | Temperature rise test system and method under a kind of operating condition of photovoltaic DC-to-AC converter scene |
| CN110165781A (en) * | 2019-05-28 | 2019-08-23 | 国网浙江省电力有限公司电力科学研究院 | Magnetic valve type controllable reactor wireless temperature condition monitoring system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107505521A (en) * | 2017-08-10 | 2017-12-22 | 中国科学院上海高等研究院 | The passive and wireless temperature rise sensor and detection method for temperature rise of a kind of power distribution network transformer |
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| CN108534908A (en) * | 2018-03-23 | 2018-09-14 | 国网河北省电力有限公司电力科学研究院 | Transformer oil surface temperature sensor |
| CN110165781A (en) * | 2019-05-28 | 2019-08-23 | 国网浙江省电力有限公司电力科学研究院 | Magnetic valve type controllable reactor wireless temperature condition monitoring system and method |
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Application publication date: 20160210 |