CN103323056B - A kind of power equipment DC current temperature, pressure monitoring device - Google Patents

A kind of power equipment DC current temperature, pressure monitoring device Download PDF

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Publication number
CN103323056B
CN103323056B CN201310260086.7A CN201310260086A CN103323056B CN 103323056 B CN103323056 B CN 103323056B CN 201310260086 A CN201310260086 A CN 201310260086A CN 103323056 B CN103323056 B CN 103323056B
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China
Prior art keywords
optical fiber
pressure
power equipment
temperature
unit
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CN201310260086.7A
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Chinese (zh)
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CN103323056A (en
Inventor
张敬安
黄利军
饶国辉
张仑山
张子彪
黄浩然
王柏恒
靳玮玮
赵冠华
耿战霞
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国家电网公司
许继集团有限公司
许继电气股份有限公司
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Priority to CN201310260086.7A priority Critical patent/CN103323056B/en
Publication of CN103323056A publication Critical patent/CN103323056A/en
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Publication of CN103323056B publication Critical patent/CN103323056B/en

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Abstract

The invention discloses a kind of power equipment DC current temperature, pressure monitoring device, including data acquisition process unit, Digital output unit and optical fiber grating sensing unit, described optical fiber grating sensing unit, data acquisition process unit, Digital output unit are sequentially connected with; Described optical fiber grating sensing unit at least includes being respectively used to gather the optical fiber temperature sensing element of the temperature of power equipment tested point to be measured, electric current and pressure, current optical fiber sensing element and pressure Fibre Optical Sensor unit. The power equipment DC current temperature, pressure monitoring device of the present invention is according to the three kinds different physical quantity of the requirement simultaneously monitoring current of intelligent grid, temperature and pressure, electric power electrical apparatus operation conditions is monitored, initial data is provided for power equipment monitoring and decision support, identify the irregular change of electric power electrical apparatus warning information and device parameter in time, electric equipment operation situation is made correct assessment and judgement, the reliable basis of aid decision is provided to operational management personnel.

Description

A kind of power equipment DC current temperature, pressure monitoring device
Technical field
The invention belongs to extra-high voltage direct-current transmission field, be specifically related to a kind of based on the electric current of Fiber Bragg Grating technology, temperature and pressure intelligent monitoring device.
Background technology
Equipment in power industry is in strong-electromagnetic field mostly, and it is that apparatus overheat causes that electrical equipment produces most of reason of fault. The hot stall of electrical equipment refers mainly to exposed joint owing to crimping the reasons such as bad, and under the big function of current, connector temperature raises, and contact point oxidation causes contact resistance to increase, and vicious cycle causes a hidden trouble. This type of fault accounts for more than the 90% of hot stall. From the generation of end or the accident that is superheated to of converting equipment, its development speed is relatively slower, the time is longer, is possible to prevent, is stopped the generation of this type of accident completely by cable/device temperature monitoring system.
Except temperature monitoring, in fault initial stage is to high-voltage operation environment, insulator leakage current and monitoring point microclimate situation carry out monitoring in real time understanding electric equipment operation situation. When the factors such as the change of site environment humidity, pollution severity of insulators thing too much, covering ice for insulator, zero resistance insulator cause insulator leakage current to increase, system can send in advance/warning message to circuit operation maintenance department in time, play early discovery, early prevention, accident is got rid of the effect in bud.
It addition, under heavy snow vile weather, mainly adopt deicing device to eliminate the icing power industry of transmission line of electricity, the pressure produced that accumulated snow is frozen does not take effective monitoring measure.Excessive pressure transmission line of electricity applied by heavy snow etc. may initiation potential event, therefore monitoring wire tension is extremely important in real time, especially for the mountain area cable and wire that those not easily monitor.
Fiber-optic grating sensor is a kind of novel distributed sensor, it is possible to sense multiple physical quantity, but be applied to now in the monitoring of direct current transportation power equipment little. Monitoring temperature currently mainly adopts infrared technology, adopts handheld device to electrical equipment regular visit. Application number 201020644978.9 discloses one " the power equipment temperature online monitoring system based on fiber-optical grating temperature sensor ", make use of fiber-optical grating temperature sensor to achieve the on-line monitoring of power equipment temperature; But in this area so far but without finding to utilize Fiber Bragg Grating technology to realize power equipment electric current and pressure, to the monitoring of electrical equipment Leakage Current and transmission line of electricity wire tension currently without highly desirable technological means; Additionally, current domestic application is single in the apparatus function of power equipment electric current, temperature and pressure monitoring, one device or module can only realize the measurement monitoring of a parameter, this just requires that the device kind of detection system is many, cost is high, installing complexity, operation maintenance workload is big, and patrol officer's total quality is required height.
Summary of the invention
It is an object of the invention to provide a kind of power equipment DC current temperature, pressure monitoring device, to monitor while realizing electric current, three kinds of physical quantitys of temperature and pressure.
In order to realize object above, the technical solution adopted in the present invention is: a kind of power equipment DC current temperature, pressure monitoring device, including data acquisition process unit, Digital output unit and optical fiber grating sensing unit, described optical fiber grating sensing unit, data acquisition process unit, Digital output unit are sequentially connected with; Described optical fiber grating sensing unit at least includes being respectively used to gather the optical fiber temperature sensing element of the temperature of power equipment tested point to be measured, electric current and pressure, current optical fiber sensing element and pressure Fibre Optical Sensor unit.
Described optical fiber grating sensing unit adopts modularity and integrated structure, and each optical fiber is arranged in an integrated box, is additionally provided with a fixed mount for each optical fiber is easily separated to avoid cross-contact in described integrated box.
Each Fibre Optical Sensor unit in described optical fiber grating sensing unit is a corresponding optical fiber respectively, and each optical fiber at least includes a sensing element for detecting corresponding power equipment tested point to be measured.
Described current optical fiber sensing element is installed for the surface being close to the piezoelectric ceramics being connected with current converter set by described power equipment tested point to be measured.
Described pressure Fibre Optical Sensor unit is for being attached at the metallic plate set by described power equipment tested point to be measured.
Described optical fiber temperature sensing element is used for being installed on described power equipment tested point surface to be measured.
Described data acquisition process unit adopts FPGA.
Described Digital output unit adopts embedded POWERPC processor.
The power equipment DC current temperature, pressure monitoring device of the present invention utilizes fiber grating sensing technology, highly integrated electric current, three kinds of sensing elements of temperature and pressure, gather the data process through internal data acquisition process unit, be the IEC61850 data frame format required output by Digital output cell translation. This device is according to the three kinds different physical quantity of the requirement simultaneously monitoring current of intelligent grid, temperature and pressure, electric power electrical apparatus operation conditions is monitored, initial data is provided for power equipment monitoring and decision support, identify the irregular change of electric power electrical apparatus warning information and device parameter in time, electric equipment operation situation is made correct assessment and judgement, the reliable basis of aid decision is provided to operational management personnel.
Accompanying drawing explanation
Fig. 1 is sensing element structural representation of the present invention;
Fig. 2 is magnitude of current processing procedure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
A kind of power equipment DC current temperature, pressure monitoring device of the present invention includes data acquisition process unit, Digital output unit and optical fiber grating sensing unit, and optical fiber grating sensing unit, data acquisition process unit, Digital output unit are sequentially connected with; Optical fiber grating sensing unit at least includes being respectively used to gather the optical fiber temperature sensing element of the temperature of power equipment tested point to be measured, electric current and pressure, current optical fiber sensing element and pressure Fibre Optical Sensor unit,
The present embodiment illustrates for electric current, temperature and pressure collection: the power equipment DC current temperature, pressure of present invention monitoring device from electric current, three kinds of physical quantitys of temperature and pressure collect digital output needs through three processes: first is the conversion of optical fiber grating sensing unit physical interface; Second is collection and the process of data; 3rd is the Digital output of data. In order to realize this purpose, the present invention adopts special process by optical fiber grating sensing unit Highgrade integration; Data process and collection employing cost is low, flexible in programming, technical field FPGA efficient, reliable realizes; The output of IEC61850 digital quantity adopts the embedded POWERPC processor of Low Power High Performance to realize.
The present embodiment optical fiber grating sensing unit adopts modularity and integrated structure, and each optical fiber is arranged in an integrated box by enhanced sensitivity material 2, is additionally provided with a fixed mount 1 that each optical fiber is easily separated to avoid cross-contact in integrated box. Optical fiber grating sensing unit physical interface mainly utilizes the sensing element of write to gather electric current, three kinds of physical quantitys of temperature and pressure simultaneously. Fig. 1 is integrated sensing element internal structure schematic diagram, three optical fiber 3~5 do respectively electric current temperature and pressure sensing, be contained on high tension cable by enhanced sensitivity material is triumphant, be finally encapsulated in tested point by integrated box.
Current optical fiber sensing element is installed for the surface being close to the piezoelectric ceramics being connected with current converter set by power equipment tested point to be measured and is realized current detecting: current signal, the monitoring of electric current is transformed to voltage signal first with current converter, change in voltage can make piezoelectric ceramics (PZT) produce deformation, fiber grating is close to piezoelectric ceramics surface, utilize the wave length shift of the fiber grating being affixed on piezoelectric ceramics surface, predict its deformation, and then sensing current intensity, the method cost is low, and electric isolution that need not be complicated.
Pressure Fibre Optical Sensor unit realizes pressure detecting for being attached on the metallic plate set by described power equipment tested point to be measured. The monitoring of pressure is the loading capacity of monitoring transmission line of electricity, the change of loading capacity is converted into the change of stress suffered by the metallic plate being close to transmission line of electricity, and the optical fiber grating sensing unit that this STRESS VARIATION is sticked on metallic plate detects. Utilizing fiber-optic grating sensor to realize the monitoring under remote adverse circumstances, in this case, the spacing of adjacent gratings is relatively big, can not need fast modulation and demodulation.
Optical fiber temperature sensing element is used for being directly mounted at power equipment tested point surface to be measured composition fiber-optical grating temperature sensor and realizes temperature detection.
Each Fibre Optical Sensor unit in optical fiber grating sensing unit corresponding optical fiber respectively in power equipment DC current temperature, pressure of the present invention monitoring device, and each optical fiber at least includes a sensing element for detecting corresponding power equipment tested point to be measured, the present embodiment at least can write 100 sensing elements, 500 can be expanded to according to user demand, each monitoring device can connect the some optical fiber having sensing element simultaneously.The distribution distance of sensing element can reach 20 kilometers.
When carrying out data acquisition and processing (DAP), the present embodiment realizes electric current, the collection of three kinds of physical quantitys of temperature and pressure and process by software and hardware, hardware interface mainly adopts FPGA and optical fiber grating sensing unit interface, utilizing the conversion of FPGA programming realization data simultaneously and process, software implementing course has: synchronous averaging; AD samples; Algorithm realizes; Data process and store; Data forward: first, the optical signal coming from optical fiber grating sensing unit is converted to the signal of telecommunication, and through processing and amplifying, the AD function of FPGA completes data sampling when receiving synchronous averaging sampled signal, being converted to digital signal after algorithm process, sample frequency is 4KHZ. Fig. 2 is the software processes of electric current, and the software processes of temperature and pressure is similarly.
The Digital output unit of data mainly adopts the POWERPC processor of low-power consumption, according to intelligent grid requirement, by the physical electrical amount after process according to IEC61850 standard output, data output adopts IEC61850-9-1 or IEC61850-9-2 standard frame format, data after process are exported process-level network or relevant IED intelligent electronic device again through optical fiber by Ethernet data interface. Output information accomplishes digitized, and information transmission realizes networking, and traffic model reaches standardization, makes various equipment and function share unified information platform according to the requirement of interoperability.

Claims (7)

1. a power equipment DC current temperature, pressure monitoring device, it is characterized in that: including data acquisition process unit, Digital output unit and optical fiber grating sensing unit, described optical fiber grating sensing unit, data acquisition process unit, Digital output unit are sequentially connected with; Described optical fiber grating sensing unit at least includes being respectively used to gather the optical fiber temperature sensing element of the temperature of power equipment tested point to be measured, electric current and pressure, current optical fiber sensing element and pressure Fibre Optical Sensor unit; Each Fibre Optical Sensor unit in described optical fiber grating sensing unit is a corresponding optical fiber respectively, and each optical fiber at least includes a sensing element for detecting corresponding power equipment tested point to be measured; Described optical fiber at least includes three, and three optical fiber do electric current, temperature and pressure sensing respectively.
2. power equipment DC current temperature, pressure according to claim 1 monitoring device, it is characterized in that: described optical fiber grating sensing unit adopts modularity and integrated structure, each optical fiber is arranged in an integrated box, is additionally provided with a fixed mount for each optical fiber is easily separated to avoid cross-contact in described integrated box.
3. power equipment DC current temperature, pressure according to claim 1 monitoring device, it is characterised in that: described current optical fiber sensing element is installed for the surface being close to the piezoelectric ceramics being connected with current converter set by described power equipment tested point to be measured.
4. power equipment DC current temperature, pressure according to claim 1 monitoring device, it is characterised in that: described pressure Fibre Optical Sensor unit is for being attached at the metallic plate set by described power equipment tested point to be measured.
5. power equipment DC current temperature, pressure according to claim 1 monitoring device, it is characterised in that: described optical fiber temperature sensing element is used for being installed on described power equipment tested point surface to be measured.
6. power equipment DC current temperature, pressure according to claim 5 monitoring device, it is characterised in that: described data acquisition process unit adopts FPGA.
7. power equipment DC current temperature, pressure according to claim 5 monitoring device, it is characterised in that: described Digital output unit adopts embedded POWERPC processor.
CN201310260086.7A 2013-06-26 2013-06-26 A kind of power equipment DC current temperature, pressure monitoring device CN103323056B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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Publication number Priority date Publication date Assignee Title
CN2539146Y (en) * 2002-04-08 2003-03-05 胡浩 Optical fibre raster temp voltage sensor
CN101393444A (en) * 2008-10-31 2009-03-25 上海华魏自动化设备有限公司 Combined monitoring system
CN101640092A (en) * 2009-07-27 2010-02-03 苑泽 Photoelectric winding
CN101852626A (en) * 2009-04-01 2010-10-06 西南交通大学 Narrow-band distributed feedback laser wavelength scanning fiber bragg grating sensing device

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JP2002022777A (en) * 2000-07-13 2002-01-23 Matsushita Electric Ind Co Ltd Optical system sensor device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2539146Y (en) * 2002-04-08 2003-03-05 胡浩 Optical fibre raster temp voltage sensor
CN101393444A (en) * 2008-10-31 2009-03-25 上海华魏自动化设备有限公司 Combined monitoring system
CN101852626A (en) * 2009-04-01 2010-10-06 西南交通大学 Narrow-band distributed feedback laser wavelength scanning fiber bragg grating sensing device
CN101640092A (en) * 2009-07-27 2010-02-03 苑泽 Photoelectric winding

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