CN102944801A - Online monitoring system for carrying capacity of cable - Google Patents
Online monitoring system for carrying capacity of cable Download PDFInfo
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- CN102944801A CN102944801A CN2012105327627A CN201210532762A CN102944801A CN 102944801 A CN102944801 A CN 102944801A CN 2012105327627 A CN2012105327627 A CN 2012105327627A CN 201210532762 A CN201210532762 A CN 201210532762A CN 102944801 A CN102944801 A CN 102944801A
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Abstract
The invention discloses an online monitoring system for carrying capacity of a cable, belonging to the technical field of electrical equipment. The online monitoring system comprises an optical fiber grating temperature sensor, a load current collector and a micro processor, wherein the optical fiber grating temperature sensor is used for monitoring the ambient temperature of the outer skin of the cable and the cable in real time; the load current collector is used for monitoring the cable load current in real time; and the micro processor is used for receiving the temperature information monitored by the optical fiber grating temperature sensor, and the current magnitude information collected by the load current collector, and acquiring the carrying capacity of the cable by combining structure parameters and the arrangement state of the cable, wherein the load current collector is connected with the micro processor by a photoelectric converter; and the optical fiber grating temperature sensor is connected with the micro processor. The online monitoring system achieves real-time monitoring on the cable current, can acquire the current residual carrying capacity of the cable in real time, and can randomly expand according to the requirements, so that overload and light-load of the cable can be effectively avoided to improve the utilization efficiency of the cable and guarantee the stable operation of the circuit.
Description
Technical field
The invention belongs to electrical equipment technical field, particularly relate to a kind of on-line monitoring system of current-carrying capacity of cable.
Background technology
At present, high speed development along with society, electric energy has been played the part of more and more important role as clean energy resource in human society, cable is as one of requisite carrier in the current delivery process, and its performance and characteristic have determined the quality of transmission of electricity and each aspect of transmission of electricity security performance; Among a plurality of performance index of cable, the important parameter when current-carrying capacity of cable moves as cable is paid close attention to by people day by day;
The current-carrying capacity of cable the method for monitoring of traditional type has thermocouple method, thermal infrared imager method etc., and all there is certain defective in these methods, can not satisfy current-carrying capacity calculate in for the requirement of applicability, stability, accuracy aspect.That thermopair is placed circuit earth fault position occurred frequently such as thermocouple method, mostly be greatly cable termination or intermediate head position, this method have the investment little, the characteristics such as simple to operate, but the precision of measuring is relatively poor, and the just local temperature of circuit that obtains, more can not calculate by data the real-time current-carrying capacity of cable fully.The thermal infrared imager method is the contactless monitoring method that just proposed in recent years, concrete grammar is the heat picture of taking cable surface by thermal infrared imager, the cable surface temperature is measured, the recycling data are calculated the cable core temperature, thereby utilize these temperature datas to calculate the current-carrying capacity of cable, implement contactless, real-time visible inline diagnosis.Although this method has been broken the limitation of traditional contact type measurement technology, for as bury the comparatively complicated long-distance cable circuit of situation underground, this method limitation is larger.
Summary of the invention
Goal of the invention of the present invention is: for the defective of above-mentioned proposition prior art, based on fiber-optical grating temperature sensor, load current collector and microprocessor, propose a kind of on-line monitoring system with real-time, that precision is high current-carrying capacity of cable.
The technical scheme that the present invention takes for the technical matters that exists in the solution known technology is:
A kind of on-line monitoring system of current-carrying capacity of cable comprises:
Be used for cable exocuticle and cable ambient temperature are carried out the fiber-optical grating temperature sensor of Real Time Monitoring;
Be used for the cable load current is carried out the load current collector of Real Time Monitoring;
And microprocessor, described microprocessor receives the temperature information that described fiber-optical grating temperature sensor monitors, the magnitude of current information that described load current collector monitors, and simultaneously in conjunction with construction of cable parameter and arrangement situation, obtains the current-carrying capacity of cable;
Wherein: described load current collector is connected with microprocessor by photoelectric commutator, and described fiber-optical grating temperature sensor is connected with microprocessor.
As preferred version, the present invention has also adopted following technical scheme:
Further: described fiber-optical grating temperature sensor is installed on cable surface.
Further: every 0.5m-1.5m a fiber-optical grating temperature sensor is installed at described cable surface.
Further: described load current collector is installed in the cable incoming-outgoing wire switch cubicle, is connected with Current Transformer Secondary side in the cabinet.
Further: described photoelectric commutator is provided with the signal modulation module, and described microprocessor is provided with the signal demodulation module.
Further: be connected by wire between described load current collector and the described photoelectric commutator, be connected by optical fiber between described photoelectric commutator and the described microprocessor, be connected by optical fiber between described fiber-optical grating temperature sensor and the described microprocessor.
Further: described microprocessor comprises: data analysis processing module, data memory module, parameter input module, data outputting module and data disaply moudle.
Further: described microprocessor is industrial computer.
Advantage and good effect that the present invention has are:
1. by adopting technique scheme, the present invention has realized the Real Time Monitoring of cable current, can Real-time Obtaining cable current residual load-bearing capacity, and can carry out according to demand arbitrary extension; Therefore can effectively avoid cable overload, underloading, and then improve the utilization ratio of cable, ensure the stable operation of circuit, play an important role aspect the management of electrical network and the optimization.
2. owing to used a large amount of fiber-optical grating temperature sensors and load current collector among the present invention, therefore the current signal that at first the load current collector collected of the present invention is converted into light signal by photoelectric commutator and transmits, therefore improved the efficient of communication, simultaneously because photoelectric commutator has the modulation /demodulation module, therefore reduce the bit error rate of signal transmission, guaranteed the quality of signal transmission.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is partial structurtes synoptic diagram of the present invention; Be mainly used in showing the structure of microprocessor.
Wherein: 1, load current collector; 2, photoelectric commutator; 3, fiber-optical grating temperature sensor; 4, microprocessor; 4-1, data analysis processing module; 4-2, data memory module; 4-3, parameter input module; 4-4, data outputting module; 4-5, data disaply moudle.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1, a kind of on-line monitoring system of current-carrying capacity of cable comprises: several load current collectors 1, photoelectric commutator 2, several fiber-optical grating temperature sensors 3 and microprocessor 4; Wherein: fiber-optical grating temperature sensor 3 is used for cable exocuticle and cable ambient temperature are carried out Real Time Monitoring; Load current collector 1 is used for the cable load current is carried out Real Time Monitoring; Microprocessor 4 is the core component of this supervisory system, microprocessor 4 receives the temperature information that fiber-optical grating temperature sensor 3 monitors, the magnitude of current information that load current collector 1 monitors on the one hand, on the other hand in conjunction with construction of cable parameter and arrangement situation, by calculating, obtain current-carrying capacity information, the residue current-carrying capacity information of cable.And the load condition of cable made judge: overload, underloading or suitable carrying.
The annexation of each parts is in this concrete in real time example: load current collector 1 is connected with microprocessor 4 by photoelectric commutator 2, and fiber-optical grating temperature sensor 3 is connected with microprocessor 4; Be connected by wire between load current collector 1 and the photoelectric commutator 2, be connected by optical fiber between photoelectric commutator 2 and the microprocessor 4, be connected by optical fiber between fiber-optical grating temperature sensor 3 and the microprocessor 4.
See also Fig. 2, microprocessor 4 comprises: data analysis processing module 4-1, data memory module 4-2, parameter input module 4-3, data outputting module 4-4 and data disaply moudle 4-5.
The present invention passes through at cable exocuticle and surrounding environment installing optical fibres grating temperature sensor 3 thereof, it is 1 meter that fiber-optical grating temperature sensor 3 is laid dot spacing, fiber-optical grating temperature sensor 3 with the real time temperature signal that measures in the mode of light signal by Optical Fiber Transmission to microprocessor 4, load current collector 1 is installed in the cable incoming-outgoing wire switch cubicle, be connected with Current Transformer Secondary side in the cabinet, and with the three-phase load current signal that collects by wire transmission to photoelectric commutator 2, photoelectric commutator 2 carries out opto-electronic conversion to received signal, and utilize the modulation module of self to modulate, output optical signal, utilize optical fiber with optical signal transmission to microprocessor 4, microprocessor 4 at first utilizes self demodulation module to carry out to the received signal demodulation, and then carries out Treatment Analysis.
In the present invention, according to site environment and working condition requirement, microprocessor 4 is selected industrial computer, wherein: by structural parameters and the arrangement situation of parameter input module 4-3 to the industrial computer input cable; Industrial computer will be from the set of signals that fiber-optical grating temperature sensor 3 and photoelectric commutator 2 receive demodulation and analyze comparison, eigenwert is sent to data analysis processing module 4-1, after data analysis processing module 4-1 carries out current-carrying capacity calculating, result of calculation is sent to data disaply moudle 4-5 by data outputting module 4-4 show, finish the data storage by data memory module 4-2 simultaneously.
More than specific embodiments of the invention are had been described in detail, but described content only is preferred embodiment of the present invention, can not be considered to be used to limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., all should still belong within the patent covering scope of the present invention.
Claims (8)
1. the on-line monitoring system of a current-carrying capacity of cable is characterized in that: comprising:
Be used for cable exocuticle and cable ambient temperature are carried out the fiber-optical grating temperature sensor of Real Time Monitoring;
Be used for the cable load current is carried out the load current collector of Real Time Monitoring;
And microprocessor, described microprocessor receives the temperature information that described fiber-optical grating temperature sensor monitors, the magnitude of current information that described load current collector monitors, and simultaneously in conjunction with construction of cable parameter and arrangement situation, obtains the current-carrying capacity of cable;
Wherein: described load current collector is connected with microprocessor by photoelectric commutator, and described fiber-optical grating temperature sensor is connected with microprocessor.
2. the on-line monitoring system of current-carrying capacity of cable according to claim 1, it is characterized in that: described fiber-optical grating temperature sensor is installed on cable surface.
3. the on-line monitoring system of current-carrying capacity of cable according to claim 2 is characterized in that: every 0.5m-1.5m a fiber-optical grating temperature sensor is installed at described cable surface.
4. the on-line monitoring system of current-carrying capacity of cable according to claim 1, it is characterized in that: described load current collector is installed in the cable incoming-outgoing wire switch cubicle, is connected with Current Transformer Secondary side in the cabinet.
5. the on-line monitoring system of current-carrying capacity of cable according to claim 1, it is characterized in that: described photoelectric commutator is provided with the signal modulation module, and described microprocessor is provided with the signal demodulation module.
6. the on-line monitoring system of current-carrying capacity of cable according to claim 1, it is characterized in that: be connected by wire between described load current collector and the described photoelectric commutator, be connected by optical fiber between described photoelectric commutator and the described microprocessor, be connected by optical fiber between described fiber-optical grating temperature sensor and the described microprocessor.
7. the on-line monitoring system of current-carrying capacity of cable according to claim 1, it is characterized in that: described microprocessor comprises: data analysis processing module, data memory module, parameter input module, data outputting module and data disaply moudle.
8. the on-line monitoring system of described current-carrying capacity of cable according to claim 1-7, it is characterized in that: described microprocessor is industrial computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105327627A CN102944801A (en) | 2012-12-10 | 2012-12-10 | Online monitoring system for carrying capacity of cable |
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| CN2012105327627A CN102944801A (en) | 2012-12-10 | 2012-12-10 | Online monitoring system for carrying capacity of cable |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103398740A (en) * | 2013-07-29 | 2013-11-20 | 中海石油（中国）有限公司天津分公司 | Real-time on-line monitoring device for monitoring abnormal operation of switch cabinet |
| CN103399226A (en) * | 2013-07-29 | 2013-11-20 | 中海石油（中国）有限公司天津分公司 | Monitoring device and monitoring method for current capacity of maritime platform cable |
| WO2014161476A1 (en) * | 2013-04-02 | 2014-10-09 | 国家电网公司 | Analysis system and calculation method of current-carrying capacity of cable based on linear temperature-sensing technology |
| CN104266778A (en) * | 2014-09-11 | 2015-01-07 | 深圳供电局有限公司 | Remote dynamic cable group wire core temperature monitoring system |
| CN104359588A (en) * | 2014-11-18 | 2015-02-18 | 国家电网公司 | Power cable temperature measuring device |
| CN104459380A (en) * | 2014-11-20 | 2015-03-25 | 广州供电局有限公司 | Method and system for measuring cable load carrying capacity |
| CN105300450A (en) * | 2015-11-04 | 2016-02-03 | 成都聚智工业设计有限公司 | Novel cable detection device |
| RU2598684C1 (en) * | 2015-07-27 | 2016-09-27 | Виктор Александрович Козлов | Method for determining point of unauthorised connection of load to power transmission line |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014161476A1 (en) * | 2013-04-02 | 2014-10-09 | 国家电网公司 | Analysis system and calculation method of current-carrying capacity of cable based on linear temperature-sensing technology |
| CN103398740A (en) * | 2013-07-29 | 2013-11-20 | 中海石油（中国）有限公司天津分公司 | Real-time on-line monitoring device for monitoring abnormal operation of switch cabinet |
| CN103399226A (en) * | 2013-07-29 | 2013-11-20 | 中海石油（中国）有限公司天津分公司 | Monitoring device and monitoring method for current capacity of maritime platform cable |
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| CN104266778A (en) * | 2014-09-11 | 2015-01-07 | 深圳供电局有限公司 | Remote dynamic cable group wire core temperature monitoring system |
| CN104359588A (en) * | 2014-11-18 | 2015-02-18 | 国家电网公司 | Power cable temperature measuring device |
| CN104459380A (en) * | 2014-11-20 | 2015-03-25 | 广州供电局有限公司 | Method and system for measuring cable load carrying capacity |
| RU2598684C1 (en) * | 2015-07-27 | 2016-09-27 | Виктор Александрович Козлов | Method for determining point of unauthorised connection of load to power transmission line |
| CN105300450A (en) * | 2015-11-04 | 2016-02-03 | 成都聚智工业设计有限公司 | Novel cable detection device |
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Application publication date: 20130227 |