CN103323056A - Direct current, temperature and pressure monitoring device for electrical equipment - Google Patents
Direct current, temperature and pressure monitoring device for electrical equipment Download PDFInfo
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- CN103323056A CN103323056A CN2013102600867A CN201310260086A CN103323056A CN 103323056 A CN103323056 A CN 103323056A CN 2013102600867 A CN2013102600867 A CN 2013102600867A CN 201310260086 A CN201310260086 A CN 201310260086A CN 103323056 A CN103323056 A CN 103323056A
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Abstract
The invention discloses a direct current, temperature and pressure monitoring device for electrical equipment. The direct current, temperature and pressure monitoring device comprises a data collecting and processing unit, a digitization output unit and a fiber bragg grating sensing unit. The fiber bragg grating sensing unit, the data collecting and processing unit and the digitization output unit are connected in sequence. The fiber bragg grating sensing unit at least comprises a temperature optical fiber sensing element, a current optical fiber sensing element and a pressure optical fiber sensing element, wherein the temperature optical fiber sensing element, a current optical fiber sensing element and the pressure optical fiber sensing element are used for collecting the temperature, the current and the pressure of a position to be measured of the electrical equipment respectively. The direct current, temperature and pressure monitoring device for the electrical equipment simultaneously monitors three different physical quantities, namely the current, the temperature and the pressure, according to the requirements of smart power grids, monitors the running state of the power electrical equipment, provides original data for electrical equipment monitoring and decision support, timely identifies a warning message of the power electrical equipment and abnormal changes in parameters of the electrical equipment, correctly evaluates and judges the running state of the electrical equipment, and provides operation managing staff with reliable bases for aiding decision making.
Description
Technical field
The invention belongs to the extra-high voltage direct-current transmission field, be specifically related to a kind of electric current based on Fiber Bragg Grating technology, temperature and pressure intelligent monitoring device.
Background technology
Equipment in the power industry is in the strong-electromagnetic field mostly, and most of reason that electrical equipment produces fault is that apparatus overheat causes.The hot stall of electrical equipment mainly refers to exposed joint owing to reasons such as crimping are bad, and under the big function of current, connector temperature raises, and the contact point oxidation causes that contact resistance increases, and vicious cycle causes a hidden trouble.This type of fault accounts for more than 90% of hot stall.From the generation of the accident that is superheated to of cable end or converting equipment, its speed of development relatively slowly, the time is longer, by the generation that cable/the device temperature monitoring system can prevent fully, stop this type of accident.
Except temperature monitoring, the fault initial stage to the high-voltage operation environment in insulator leakage current and monitoring point microclimate situation monitor in real time and can well understand the electric equipment operation situation.When factors such as site environment humidity changes, the insulator surface dunghill is too much, covering ice for insulator, zero resistance insulator cause that insulator leakage current increases, system can in time send in advance/warning message to circuit operation maintenance department, play early and find, early prevent, the effect of accident eliminating in bud.
In addition, under the heavy snow inclement weather, mainly adopt deicing device to eliminate to the icing power industry of transmission line of electricity, the icing pressure that produces of accumulated snow is not taked effective monitoring measure.The excessive pressure that transmission line of electricity is applied by heavy snow etc. may the initiation potential event, and therefore the monitoring wire tension is extremely important in real time, particularly for those mountain area cable and wires that is difficult for monitoring.
Fiber-optic grating sensor is a kind of novel distributed sensor, can the multiple physical quantity of sensing, but be applied to now in the monitoring of direct current transportation power equipment but seldom.Monitoring temperature is the main infrared technology that adopts at present, adopts handheld device to the electrical equipment regular visit.Application number 201020644978.9 discloses a kind of " based on the power equipment temperature online monitoring system of fiber-optical grating temperature sensor ", has utilized fiber-optical grating temperature sensor to realize the on-line monitoring of power equipment temperature; But also find to utilize Fiber Bragg Grating technology to realize power equipment electric current and pressure in this area so far, the monitoring of electrical equipment Leakage Current and transmission line of electricity wire tension is not had very desirable technological means at present; In addition, present domestic power equipment electric current, the temperature and pressure device for monitoring function singleness of being applied to, a device or module can only realize the measurement monitoring of a parameter, this just requires the device kind of detection system many, the cost height, complexity is installed, and the operation maintenance workload is big, requires high to patrolling and examining personnel's total quality.
Summary of the invention
The purpose of this invention is to provide a kind of power equipment DC current temperature, pressure monitoring device, monitoring in the time of with realization electric current, three kinds of physical quantitys of temperature and pressure.
In order to realize above purpose, the technical solution adopted in the present invention is: a kind of power equipment DC current temperature, pressure monitoring device, comprise data acquisition process unit, digitizing output unit and optical fiber grating sensing unit, described optical fiber grating sensing unit, data acquisition process unit, digitizing output unit connect in turn; Described optical fiber grating sensing unit comprises temperature Fibre Optical Sensor unit, electric current Fibre Optical Sensor unit and the pressure Fibre Optical Sensor unit of the temperature, electric current and the pressure that are respectively applied to gather power equipment tested point to be measured at least.
Described optical fiber grating sensing unit adopts modularization and integrated structure, and each optical fiber is arranged in the integrated box, also is provided with one in the described integrated box and is used for each optical fiber is separated to avoid intersecting the fixed mount that contacts.
Each respectively corresponding optical fiber of Fibre Optical Sensor unit in the described optical fiber grating sensing unit, and each optical fiber comprises one at least for detection of the sensing unit of correspondence power equipment tested point to be measured.
The first surface installation that is used for being close to the set piezoelectric ceramics that is connected with current converter of described power equipment tested point to be measured of described electric current Fibre Optical Sensor.
Described pressure Fibre Optical Sensor is first in being attached at the set sheet metal of described power equipment tested point to be measured.
Described temperature Fibre Optical Sensor is first in being installed on described power equipment tested point to be measured surface.
Described data acquisition process unit adopts FPGA.
Described digitizing output unit adopts embedded POWERPC processor.
Power equipment DC current temperature, pressure monitoring device of the present invention utilizes fiber grating sensing technology, height integrated current, three kinds of sensing units of temperature and pressure, image data is converted to the data frame format output that IEC61850 requires through the processing of internal data acquisition process unit by the digitizing output unit.This device is according to requirement while monitoring current, three kinds of different physical quantitys of temperature and pressure of intelligent grid, the electric power electrical apparatus operation conditions is monitored, for power equipment monitoring and decision support provide raw data, in time identify the irregular change of electric power electrical apparatus warning information and device parameter, the electric equipment operation situation is made correct assessment and judgement, the reliable basis of aid decision making is provided for the operational management personnel.
Description of drawings
Fig. 1 is sensing meta structure synoptic diagram of the present invention;
Fig. 2 is magnitude of current processing procedure of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further introduced.
A kind of power equipment DC current temperature, pressure monitoring device of the present invention comprises data acquisition process unit, digitizing output unit and optical fiber grating sensing unit, and optical fiber grating sensing unit, data acquisition process unit, digitizing output unit connect in turn; The optical fiber grating sensing unit comprises temperature Fibre Optical Sensor unit, electric current Fibre Optical Sensor unit and the pressure Fibre Optical Sensor unit of the temperature, electric current and the pressure that are respectively applied to gather power equipment tested point to be measured at least,
Present embodiment is that example describes with electric current, temperature and pressure collection: power equipment DC current temperature, pressure monitoring device of the present invention collects digital quantity output from electric current, three kinds of physical quantitys of temperature and pressure need be through three processes: first is the conversion of optical fiber grating sensing unit physical interface; Second is collection and the processing of data; The 3rd is the digitizing output of data.In order to realize this purpose, the present invention adopts special process with optical fiber grating sensing unit Highgrade integration; Data are handled and collection employing cost is low, programming is flexible, technical field is efficient, reliable FPGA realization; The output of IEC61850 digital quantity adopts the high performance embedded POWERPC processor of low-power consumption to realize.
Present embodiment optical fiber grating sensing unit adopts modularization and integrated structure, and each optical fiber is arranged in the integrated box by enhanced sensitivity material 2, also is provided with one in the integrated box each optical fiber separated to avoid to intersect the fixed mount 1 of contact.Optical fiber grating sensing unit physical interface mainly utilizes the sensing unit that writes to gather electric current, three kinds of physical quantitys of temperature and pressure simultaneously.Fig. 1 is integrated sensing unit inner structure synoptic diagram, three optical fiber 3～5 do respectively electric current the temperature and pressure sensing, be contained on the high-tension cable by the enhanced sensitivity material is triumphant, be encapsulated in tested point by integrated box at last.
Electric current Fibre Optical Sensor unit is used for being close to the surface installation realization current detecting of the set piezoelectric ceramics that is connected with current converter of power equipment tested point to be measured: the monitoring to electric current at first utilizes current converter that current signal is transformed to voltage signal, change in voltage can make piezoelectric ceramics (PZT) produce deformation, fiber grating is close to the piezoelectric ceramics surface, utilization is affixed on the wave length shift of the lip-deep fiber grating of piezoelectric ceramics, predict its deformation, and then predict strength of current, this method cost is low, and does not need complicated electricity to isolate.
Pressure Fibre Optical Sensor unit is used for being attached on the set sheet metal of described power equipment tested point to be measured realizing pressure detection.The monitoring of pressure is the dead weight capacity of monitoring transmission line of electricity, and the variation of dead weight capacity is converted into the variation of the suffered stress of sheet metal of being close to transmission line of electricity, and the optical fiber grating sensing unit that this STRESS VARIATION is sticked on the sheet metal detects.Utilize fiber-optic grating sensor to realize monitoring under the remote rugged surroundings, in this case, the spacing of adjacent gratings is bigger, can not need fast modulation and demodulation.
Temperature Fibre Optical Sensor unit is used for directly being installed on power equipment tested point to be measured surface and constitutes fiber-optical grating temperature sensor realization temperature detection.
Each respectively corresponding optical fiber of Fibre Optical Sensor unit in the power equipment DC current temperature, pressure monitoring device of the present invention in the optical fiber grating sensing unit, and each optical fiber comprises one at least for detection of the sensing unit of correspondence power equipment tested point to be measured, present embodiment can write 100 sensing units at least, 500 can be expanded to according to user demand, the some optical fiber that sensing unit is arranged can be connected in each monitoring device simultaneously.The distribution distance of sensing unit can reach 20 kilometers.
When carrying out data acquisition and processing (DAP), present embodiment is realized collection and the processing of electric current, three kinds of physical quantitys of temperature and pressure by software and hardware, hardware interface mainly adopts FPGA and optical fiber grating sensing unit interface, utilize the FPGA programming to realize data-switching and processing simultaneously, software implementing course has: start synchronously; The AD sampling; Algorithm is realized; Data are handled and storage; Data are transmitted: at first, the light signal that will come from optical fiber grating sensing unit is converted to electric signal, and through amplify handling, the AD function of FPGA is finished data sampling when receiving synchronous startup sampled signal, be converted to digital signal through after the algorithm process, sample frequency is 4KHZ.Fig. 2 is the software processing procedure of electric current, and the software of temperature and pressure is handled similarly.
The digitizing output unit of data mainly is the POWERPC processor that adopts low-power consumption, according to the intelligent grid requirement, physical electrical amount after handling is exported according to the IEC61850 standard, IEC61850-9-1 or IEC61850-9-2 standard frame format are adopted in data output, the Ethernet data interface, the data after will handling by optical fiber again output to process layer network or relevant IED intelligent electronic device.Output information is accomplished digitizing, and the information transmission realizes networking, and traffic model reaches standardization, makes various device and function share unified information platform according to the requirement of interoperability.
Claims (8)
1. power equipment DC current temperature, pressure monitoring device, it is characterized in that: comprise data acquisition process unit, digitizing output unit and optical fiber grating sensing unit, described optical fiber grating sensing unit, data acquisition process unit, digitizing output unit connect in turn; Described optical fiber grating sensing unit comprises temperature Fibre Optical Sensor unit, electric current Fibre Optical Sensor unit and the pressure Fibre Optical Sensor unit of the temperature, electric current and the pressure that are respectively applied to gather power equipment tested point to be measured at least.
2. power equipment DC current temperature, pressure monitoring device according to claim 1, it is characterized in that: described optical fiber grating sensing unit adopts modularization and integrated structure, each optical fiber is arranged in the integrated box, also is provided with one in the described integrated box and is used for each optical fiber is separated to avoid intersecting the fixed mount that contacts.
3. power equipment DC current temperature, pressure monitoring device according to claim 1 and 2, it is characterized in that: each the respectively corresponding optical fiber of Fibre Optical Sensor unit in the described optical fiber grating sensing unit, and each optical fiber comprises one at least for detection of the sensing unit of correspondence power equipment tested point to be measured.
4. power equipment DC current temperature, pressure monitoring device according to claim 3 is characterized in that: the first surface installation that is used for being close to the set piezoelectric ceramics that is connected with current converter of described power equipment tested point to be measured of described electric current Fibre Optical Sensor.
5. power equipment DC current temperature, pressure monitoring device according to claim 3 is characterized in that: described pressure Fibre Optical Sensor unit is used for being attached at the set sheet metal of described power equipment tested point to be measured.
6. power equipment DC current temperature, pressure monitoring device according to claim 3 is characterized in that: described temperature Fibre Optical Sensor unit is used for being installed on described power equipment tested point to be measured surface.
7. power equipment DC current temperature, pressure monitoring device according to claim 6 is characterized in that: described data acquisition process unit employing FPGA.
8. power equipment DC current temperature, pressure monitoring device according to claim 6, it is characterized in that: described digitizing output unit adopts embedded POWERPC processor.
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| CN201310260086.7A CN103323056B (en) | 2013-06-26 | 2013-06-26 | A kind of power equipment DC current temperature, pressure monitoring device |
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| CN201310260086.7A CN103323056B (en) | 2013-06-26 | 2013-06-26 | A kind of power equipment DC current temperature, pressure monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105222826A (en) * | 2014-06-27 | 2016-01-06 | 国家电网公司 | A kind of power distribution network power consumer health index apparatus for evaluating and appraisal procedure |
| CN105651344A (en) * | 2016-04-06 | 2016-06-08 | 南彦勃 | Cable clamp state detection system and method |
| CN110187211A (en) * | 2019-06-04 | 2019-08-30 | 安徽工程大学 | A kind of electric equipment intelligent test method |
| CN111551870A (en) * | 2020-05-18 | 2020-08-18 | 国网江苏省电力有限公司无锡供电分公司 | Insulator leakage current monitoring device and method based on fiber bragg grating |
| CN113917360A (en) * | 2021-09-10 | 2022-01-11 | 西安理工大学 | Insulator leakage current optical detection device integrating temperature and humidity |
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2013
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| JP2002022777A (en) * | 2000-07-13 | 2002-01-23 | Matsushita Electric Ind Co Ltd | Optical system sensor device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105222826A (en) * | 2014-06-27 | 2016-01-06 | 国家电网公司 | A kind of power distribution network power consumer health index apparatus for evaluating and appraisal procedure |
| CN105222826B (en) * | 2014-06-27 | 2018-05-18 | 国家电网公司 | A kind of power distribution network power consumer health index apparatus for evaluating and appraisal procedure |
| CN105651344A (en) * | 2016-04-06 | 2016-06-08 | 南彦勃 | Cable clamp state detection system and method |
| CN110187211A (en) * | 2019-06-04 | 2019-08-30 | 安徽工程大学 | A kind of electric equipment intelligent test method |
| CN111551870A (en) * | 2020-05-18 | 2020-08-18 | 国网江苏省电力有限公司无锡供电分公司 | Insulator leakage current monitoring device and method based on fiber bragg grating |
| CN113917360A (en) * | 2021-09-10 | 2022-01-11 | 西安理工大学 | Insulator leakage current optical detection device integrating temperature and humidity |
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| CN103323056B (en) | 2016-06-15 |
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