CN102103173A - Method and system for monitoring current-carrying capacity of cable based on distributed optical fiber temperature measuring method - Google Patents

Method and system for monitoring current-carrying capacity of cable based on distributed optical fiber temperature measuring method Download PDF

Info

Publication number
CN102103173A
CN102103173A CN2011100070532A CN201110007053A CN102103173A CN 102103173 A CN102103173 A CN 102103173A CN 2011100070532 A CN2011100070532 A CN 2011100070532A CN 201110007053 A CN201110007053 A CN 201110007053A CN 102103173 A CN102103173 A CN 102103173A
Authority
CN
China
Prior art keywords
cable
capacity
optical fiber
current
temperature
Prior art date
Application number
CN2011100070532A
Other languages
Chinese (zh)
Inventor
陈静
白万建
王玉国
张顺生
宋来森
彭红霞
Original Assignee
山东电力集团公司菏泽供电公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 山东电力集团公司菏泽供电公司 filed Critical 山东电力集团公司菏泽供电公司
Priority to CN2011100070532A priority Critical patent/CN102103173A/en
Publication of CN102103173A publication Critical patent/CN102103173A/en

Links

Abstract

The invention relates to a method and a system for monitoring current-carrying capacity of a cable based on a distributed optical fiber temperature measuring method. The system comprises a laser drive device which is matched with a temperature sensing device in a cable; the temperature sensing device is matched with the corresponding optical fiber splitter; the output end of each optical fiber splitter is connected with one end of the cable; the other end of the cable is connected with a wire distribution cabinet which is matched with demodulating equipment; and the output end of the demodulating equipment is connected with a cable integrated Ethernet chip (IEC) compute server which is output to a client terminal. Combining the distributed optical fiber temperature measuring method, by the method and system provided by the invention, the important parameters of the cable operation can be acquired; the stimulated accuracy is greatly improved through the comprehensive analysis of the current-carrying capacity, thus providing the decision standard for ensuring the safe operation of the city cables and the reasonable configuration of the transmission capacity.

Description

Current-carrying capacity of cable monitoring method and system based on the distributed optical fiber temperature measurement method
Technical field
The present invention relates to a kind of current-carrying capacity of cable monitoring method and system based on the distributed optical fiber temperature measurement method.
Background technology
Sustainable development along with industry and electric system, Voltage Cable Lines Construction in the electrical network is increasing, and the intensity of electric power transfer is also constantly increasing always, and intelligent grid is had higher requirement to transmission system, when cable moved under rated load, the core temperature reached permissible value.In a single day cable overloads, and the core temperature will sharply rise, and quickens insulation ag(e)ing, even thermal breakdown takes place.So, must control the running temperature of cable, this carries out rational management with regard to requiring operation power department to the actual load of cable.The ability to transmit electricity and the power transmission efficiency that how to improve cable system on the basis that guarantees cable long-term safety reliability service become the emphasis problem that power department is concerned about all the more.
At present, the current-carrying capacity of cable calculate to adopt the IEC standard of generally acknowledging in the world, calculates and is not suitable for complex scene but this standard satisfies current-carrying capacity under the simple scenario only, has certain limitation; On the other hand, the algorithm that the IEC standard is provided is applicable to hand computation, and such account form is too loaded down with trivial details, and the Electronic Data Processing of IEC prematurity still up to the present also is in the progressively development.Simultaneously, current I EC current-carrying capacity parameters calculated is chosen and is also monitored condition restriction, adopts empirical value or estimated value usually, and it is inaccurate to cause current-carrying capacity to calculate; Running temperature is an important parameter of cable, in the type selecting of power cable with lay the stage, owing to can not comprehensively consider to the actual motion environment, usually all carry out according to standard ambient temperature, to cause cable when environment temperature height or radiating condition are bad, to run on superheat state like this, reduce operation life.Therefore, if can be according to actual motion state and running environment, in real time the load of cable is dispatched and adjusted, not only can guarantee the security of operation of cable, its on-load ability is not fully exerted, and can also solving the electric power supply problem under the emergency in the power scheduling in some cases.
Summary of the invention
For remedying the deficiencies in the prior art, the invention provides a kind of current-carrying capacity of cable monitoring method and system based on the distributed optical fiber temperature measurement method.
For achieving the above object, the present invention adopts following technical scheme:
Based on the current-carrying capacity of cable monitoring system of distributed optical fiber temperature measurement method, it comprises laser driving apparatus, and laser driving apparatus matches with temperature sensing device in the cable; Temperature sensing device matches with corresponding optical fiber splitter, the output terminal of each optical fiber splitter is connected with optical cable one end, the optical cable other end is connected with distributing cabinet, distributing cabinet matches with demodulating equipment, the demodulating equipment output terminal is connected with cable I EC calculation server, and cable I EC calculation server outputs to client terminal.
Described laser driving apparatus comprises laser driver, and the output terminal of laser driver is connected with the input end of laser instrument.
Described temperature sensing device is a distributed temperature measuring optical fiber.
Described demodulating equipment is the fiber-optic signal (FBG) demodulator.
Described optical cable is an All Dielectric self-support.
Described current-carrying capacity of cable monitoring method based on the distributed optical fiber temperature measurement method, this monitoring method comprises the steps:
Step1: laser instrument sends pulsed light and injects distributed temperature measuring optical fiber, and the rear orientation light that thermometric optical fiber produces is input to optical cable by optical fiber splitter;
Step2: light signal is input to the fiber-optic signal (FBG) demodulator the most at last after the optical cable transmission, and the fiber-optic signal (FBG) demodulator is input to cable I EC calculation server with restituted signal;
Step3: cable I EC calculation server parses the conductor temperature θ c and the cable surface temperature θ a of certain section cable according to the light signal of input, and the computing formula of the current-carrying capacity of cable under calculating 100% load-factor that provides by IEC 60287 is calculated cable dynamic current-carrying capacity I
I = θ c - θ a - W d [ 0.5 T 1 + n ( T 2 + T 3 + T 4 ) ] RT 1 + nR ( 1 + λ 1 ) T 2 + nR ( 1 + λ 1 + λ 2 ) ( T 3 + T 4 )
Wherein, conductor temperature θ c gets the temp measuring system instantaneous value, the value when corresponding conductor AC resistance R gets corresponding to θ c; θ a is the cable surface temperature, gets the temp measuring system instantaneous value; Wd is an insulation dielectric loss; λ 1 is the protective metal shell loss factor; λ 2 is the loss factor of armor; T1, T2, T3 are respectively the thermal resistance of insulation, interior pad underlayer, outer jacket, and T4 is the cable and the thermal resistance of medium on every side, and be relevant with cable model, form of construction work; N is the cable loop number; I is a current-carrying capacity of cable under the current working;
Step4: every section cable dynamic current-carrying capacity of trying to achieve according to step3 obtains the dynamic current-carrying capacity of this root cable;
Step5: the customer service end is realized various day-to-day operation work according to the dynamic current-carrying capacity of all cables of cable I EC calculation server output.
Among the described step3, the AC resistance R=R of certain section cable conductor 0* [1+ α 20C-20)] * (1+Y s+ Y p); Wherein, R0 and α 20Be definite value, different according to types of conductors, kelvin effect factor Y s, proximity effect factor Y pReferring to IEC60287 and JB/T 101 81 series standards.
Among the described step3, insulation dielectric loss Wd provides parameter by IEC calculation server database, calculates according to certain section cable length, and the loss of unit length cable dielectric can be calculated with following formula:
W d=ωCU 0 2tgδ×10 -6
In the formula, ω=2 π f, f is a power frequency, 50Hz; C is the unit length electric cable capacitance, the μ F/cm of unit; Tg δ is the insulating material dielectric loss angle tangent; E0 is a voltage-to-ground, the V of unit.
Among the described step4, the dynamic current-carrying capacity of certain root cable is got the minimum value of each section cable dynamic current-carrying capacity in this root cable.
Beneficial effect: the present invention can realize monitoring accurately cable operating temperature, can obtain 100% load-factor current-carrying capacity information according to temperature monitoring, compare the error that has reduced current-carrying capacity of cable with traditional estimation cable temperature, analysis-by-synthesis by current-carrying capacity, the cable operation conditions is made assessment, and then provide scientific basis for rationally adjusting rated current-carrying capacity, summarize reason and the preceding various abnormal conditions that occur of fault generation that various cable faults take place simultaneously, thereby for the forecast cable fault provides theory and factual evidence, improve the accuracy of simulation greatly, provide decision-making foundation for guaranteeing city cable safe operation and reasonable disposition ability to transmit electricity.
Description of drawings
Fig. 1 is the distributed optical fiber temperature transducer system block diagram;
Fig. 2 is a structural representation block diagram of the present invention;
Fig. 3 is cable dynamic current-carrying capacity monitoring process flow diagram;
Wherein, 1 temperature sensing device, 2 optical fiber splitters, 3 optical cables, 4 distributing cabinets, 5 fiber-optic signal (FBG) demodulators, 6 cable I EC calculation servers, 7 customer service ends, 8 laser drivers, 9 laser instruments, 10 bidirectional couplers, 11 wavelength division multiplexers, 12 photoelectric detector APD, 13 amplifiers, 14 gather average totalizer, 15 microcomputers.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, be distributed optical fiber temperature transducer system, mainly contain sensor fibre, laser instrument 9 and laser driver 8, bidirectional coupler 10, wavelength division multiplexer 11, photoelectric detector APD 12, amplifier 13, gather average totalizer 14 and microcomputer 15 compositions.The pulsed light that laser instrument 9 sends injects sensor fibre as pump light through coupling mechanism, and pulsed light produces the rear orientation light of propagating backward when propagating forward in sensor fibre.Rear orientation light leaches anti-Stokes light and Reyleith scanttering light by light filtering, stokes scattering and anti Stokes scattering are referred to as Raman scattering, pass through opto-electronic conversion and amplifying circuit again, and the signal after the amplification is gathered by high-speed data acquisition card, through data processing and calibration, demodulate temperature.Distribution type fiber-optic temperature temp measuring system has the following advantages:
(1) optical fiber sense temperature and positional information, sensor is passive, essential safety.The sensor resolution height, thermometric is accurate, and the response time is short.
(2) can make high capacity, multiple spot, distributed temperature measuring system; A (FBG) demodulator can be with a hundreds of sensor; Cost saving.
(3) because full optical signal transmission is not limited by sensor distance, maximum distance sensing reaches 10km, is the very-long-range system for detecting temperature.
Native system has further improved the intellectuality of system in conjunction with the distributed optical fiber temperature measurement technology.Cable operation conditions, crimp quality quality, the discovery that can only be in operation, the overheated accident of burning of long more easy more generation working time may cause the tremendous economic loss thus.The distributed optical fiber temperature measurement technology designs because of the early prediction of faults such as insulation ag(e)ing or loose contact at cable, can eliminate these potential faults in rudiment, before occurring, potential faults gives a forecast timely, make the ruuning situation of the understanding cable that the maintainer can be real-time, the fault that may occur is handled ahead of time timely.
The temperature-measurement principle of distributed optical fiber temperature transducer system is used in the current-carrying capacity of cable monitoring system, be illustrated in figure 2 as theory diagram of the present invention, it comprises laser driving apparatus, and laser driving apparatus matches with temperature sensing device 1 in the cable; Temperature sensing device 1 matches with corresponding optical fiber splitter 2, the output terminal of each optical fiber splitter 2 is connected with optical cable 3 one ends, optical cable 3 other ends are connected with distributing cabinet 4, distributing cabinet 4 matches with demodulating equipment, the demodulating equipment output terminal is connected with cable I EC calculation server 6, and cable I EC calculation server 6 outputs to client terminal 7.
Described laser driving apparatus comprises laser driver 8, and the output terminal of laser driver 8 is connected with the input end of laser instrument 9.
Described temperature sensing device 1 is a distributed temperature measuring optical fiber.
Described demodulating equipment is a fiber-optic signal (FBG) demodulator 5.
Described optical cable is all dielectric self-supporting ADSS optical cable (All-dielectric Self-supporting Optical Cable).
Distributed temperature measuring optical fiber is the temperature sensing device 1 of system, is directly installed on cable inside, is used for measuring the temperature of every on cable; The temperature of spatial point is measured in real time in can the logarithm kilometer range, and different temperatures reflects different optical wavelength signals, realizes distributed measurement by the Raman scattering technology.
Optical fiber splitter 2 mainly is connected with between an optical fiber and a plurality of sensors, realizes distributed laying sensor;
Optical cable 3 is signal transmission passages, can built-in cable inside, and electrification ADSS optical cable has strong high pressure resistant and anti-extrusion performance;
5 effects of fiber-optic signal (FBG) demodulator are that light signal is carried out filtering amplification and demodulation, are installed in the Control Room;
Cable I EC calculation server 6 is gathered fiber-optic signal (FBG) demodulator 5 information transmitted, according to the information that collects data are handled and calibrated, the temperature data that shows each point for measuring temperature in real time, cable I EC calculation server 6 dynamically carries out current-carrying capacity calculating and cable operating analysis according to the temperature data that records simultaneously.
Analysis data and result that customer service end 7 is submitted to according to cable dynamic current-carrying capacity computing module realize various day-to-day operation work.
Cable I EC calculation server 6 carries out the computation process of dynamic current-carrying capacity, is that example describes with a cable.As shown in Figure 3, cable is divided into the k section, utilize i section distributed temperature measuring fiber-optic signal to measure the temperature of conductor and top layer in the cable of i section, light signal is input to optical cable by optical fiber splitter, after the optical cable transmission, be input to the fiber-optic signal (FBG) demodulator, the fiber-optic signal (FBG) demodulator is with the light signal demodulation and be input to cable I EC calculation server, and cable I EC calculation server is resolved temperature signal, draws the temperature θ c of conductor in the i section cable and the temperature θ a on cable top layer.
In addition, have various cable data in the IEC calculation server database, comprising: cable core pattern, insulation course, metal screen layer and armor, system of laying etc., corresponding unlike material or system of laying have different loss factors; Temperature θ c in conjunction with conductor in the i section cable can utilize formula R=R 0* [1+ α 20C-20)] * (1+Y s+ Y p) calculate the AC resistance R of this section cable conductor, wherein, R0 and α 20Be definite value, different according to types of conductors, kelvin effect factor Y s, proximity effect factor Y pComputing formula is referring to IEC60287 and JB/T 101 81 series standards.
Cable i section insulation dielectric loss Wd provide parameter by IEC calculation server database, calculates according to i section cable length, and the loss of unit length (cm) cable dielectric can be calculated with following formula:
W d=ωCU 0 2tgδ×10 -6 (1)
In the formula, ω=2 π f, f is a power frequency, 50Hz; C is the unit length electric cable capacitance, the μ F/cm of unit; Tg δ is the insulating material dielectric loss angle tangent; E0 is a voltage-to-ground, the V of unit.
Electric current I in loss Ws and the core in the cable metal sheath ' square be directly proportional, so it is approximately constant with the ratio of core loss Wc, that is:
Ws=λ1·Wc (2)
In the formula, λ 1 is the protective metal shell loss factor, is the function of protective metal shell resistance, and according to synteny is not different with the system of laying formula, sheath resistance is according to measuring temperature computation in real time.Wc=I ' 2R is the conductor thread core loss, and I ' is an electric current in the core.
The cable sheath loss is the function of armor sectional area and metallic resistance, and different armoring materials are different with the mode formula, generally calculate by the cable sheath loss factor, be example with three core round conductor wire armorings:
λ 2 = 1.23 R A R ( 2 l d A ) 2 1 ( 2.77 R A 10 6 ω ) 2 + 1 - - - ( 3 )
In the formula, R ABe the AC resistance of armouring under the actual measurement working temperature, the OHM/m of unit; d AIt is the armouring mean diameter; L is the distance between conductor axle center and the cable center, mm.
The rudimentary algorithm of the current-carrying capacity of cable under calculating 100% load-factor that provides according to IEC 60287 calculates the cable dynamic current-carrying capacity, calculates by formula (4):
I i = θ c - θ a - W d [ 0.5 T 1 + n ( T 2 + T 3 + T 4 ) ] RT 1 + nR ( 1 + λ 1 ) T 2 + nR ( 1 + λ 1 + λ 2 ) ( T 3 + T 4 ) - - - ( 4 )
During calculating, conductor temperature θ c gets the temp measuring system real-time measurement values in the formula, value when corresponding conductor AC resistance R gets corresponding to this temperature, θ c thinks 90 ℃ of the tolerant maximum operating temperatures of XLPE (major insulation) if get conductor temperature, value when the conductor AC resistance is corresponding to 90 ℃ accordingly can be calculated cable and continue to allow current-carrying capacity; θ a is the cable surface temperature, gets the temp measuring system real-time measurement values; Wd is an insulation dielectric loss; λ 1 is the protective metal shell loss factor, utilizes formula (2) to obtain, and λ 2 is the loss factor of armor; T1, T2, T3 are respectively the thermal resistance of insulation, interior pad underlayer, outer jacket; T4 is the cable and the thermal resistance of medium on every side, and is relevant with cable model, form of construction work; N is the cable loop number; I iCurrent-carrying capacity of cable for i section under the current working.
Because the conductor of diverse location cable is often different with the metallic sheath temperature in the reality, cause resistivity difference, loss difference, cause the different of the conductor of cable and metallic sheath temperature conversely again, so the dynamic current-carrying capacity of the cable of diverse location also can be different, this algorithm is divided into the k section according to each point for measuring temperature with cable, every section cable i according to its point for measuring temperature actual measurement temperature computation by formula (4) calculate dynamic current-carrying capacity I one by one iSo this root whole cable dynamic current-carrying capacity I is:
I=min{I 1,I 2,...,I i,I k} (5)?。

Claims (9)

1. based on the current-carrying capacity of cable monitoring system of distributed optical fiber temperature measurement method, it is characterized in that it comprises laser driving apparatus, laser driving apparatus matches with temperature sensing device in the cable; Temperature sensing device matches with corresponding optical fiber splitter, the output terminal of each optical fiber splitter is connected with optical cable one end, the optical cable other end is connected with distributing cabinet, distributing cabinet matches with demodulating equipment, the demodulating equipment output terminal is connected with cable I EC calculation server, and cable I EC calculation server outputs to client terminal.
2. the current-carrying capacity of cable monitoring system based on the distributed optical fiber temperature measurement method as claimed in claim 1 is characterized in that described laser driving apparatus comprises laser driver, and the output terminal of laser driver is connected with the input end of laser instrument.
3. the current-carrying capacity of cable monitoring system based on the distributed optical fiber temperature measurement method as claimed in claim 1 is characterized in that described temperature sensing device is a distributed temperature measuring optical fiber.
4. the current-carrying capacity of cable monitoring system based on the distributed optical fiber temperature measurement method as claimed in claim 1 is characterized in that described demodulating equipment is the fiber-optic signal (FBG) demodulator.
5. the current-carrying capacity of cable monitoring system based on the distributed optical fiber temperature measurement method as claimed in claim 1 is characterized in that described optical cable is an All Dielectric self-support.
6. the current-carrying capacity of cable monitoring method based on the distributed optical fiber temperature measurement method as claimed in claim 1 is characterized in that this monitoring method comprises the steps:
Step1: laser instrument sends pulsed light and injects distributed temperature measuring optical fiber, and the rear orientation light that thermometric optical fiber produces is input to optical cable by optical fiber splitter;
Step2: light signal is input to the fiber-optic signal (FBG) demodulator the most at last after the optical cable transmission, and the fiber-optic signal (FBG) demodulator is input to cable I EC calculation server with restituted signal;
Step3: cable I EC calculation server parses the conductor temperature θ c and the cable surface temperature θ a of certain section cable according to the light signal of input, and the computing formula of the current-carrying capacity of cable under calculating 100% load-factor that provides by IEC 60287 is calculated cable dynamic current-carrying capacity I
I = θ c - θ a - W d [ 0.5 T 1 + n ( T 2 + T 3 + T 4 ) ] RT 1 + nR ( 1 + λ 1 ) T 2 + nR ( 1 + λ 1 + λ 2 ) ( T 3 + T 4 )
Wherein, conductor temperature θ c gets the temp measuring system instantaneous value, the value when corresponding conductor AC resistance R gets corresponding to θ c; θ a is the cable surface temperature, gets the temp measuring system instantaneous value; Wd is an insulation dielectric loss; Going into 1 is the protective metal shell loss factor; Go into 2 for the loss factor of armor; T1, T2, T3 are respectively the thermal resistance of insulation, interior pad underlayer, outer jacket, and T4 is the cable and the thermal resistance of medium on every side, and be relevant with cable model, form of construction work; N is the cable loop number; I is a current-carrying capacity of cable under the current working;
Step4: every section cable dynamic current-carrying capacity of trying to achieve according to step3 obtains the dynamic current-carrying capacity of this root cable;
Step5: the customer service end is realized various day-to-day operation work according to the dynamic current-carrying capacity of all cables of cable I EC calculation server output.
7. the current-carrying capacity of cable monitoring method based on the distributed optical fiber temperature measurement method as claimed in claim 6 is characterized in that, among the described step3, and the AC resistance R=R of certain section cable conductor 0* [1+ α 20C-20)] * (1+Y s+ Y p); Wherein, R0 and α 20Be definite value, different according to types of conductors, kelvin effect factor Y s, proximity effect factor Y pReferring to IEC60287 and JB/T 101 81 series standards.
8. the current-carrying capacity of cable monitoring method based on the distributed optical fiber temperature measurement method as claimed in claim 6, it is characterized in that, among the described step3, insulation dielectric loss Wd provides parameter by IEC calculation server database, calculate according to certain section cable length, the loss of unit length cable dielectric can be calculated with following formula:
W d=ωCU 0 2tgδ×10 -6
In the formula, ω=2 π f, f is a power frequency, 50Hz; C is the unit length electric cable capacitance, the μ F/cm of unit; Tg δ is the insulating material dielectric loss angle tangent; E0 is a voltage-to-ground, the V of unit.
9. the current-carrying capacity of cable monitoring method based on the distributed optical fiber temperature measurement method as claimed in claim 6 is characterized in that, among the described step4, the dynamic current-carrying capacity of certain root cable is got the minimum value of each section cable dynamic current-carrying capacity in this root cable.
CN2011100070532A 2011-01-13 2011-01-13 Method and system for monitoring current-carrying capacity of cable based on distributed optical fiber temperature measuring method CN102103173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100070532A CN102103173A (en) 2011-01-13 2011-01-13 Method and system for monitoring current-carrying capacity of cable based on distributed optical fiber temperature measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100070532A CN102103173A (en) 2011-01-13 2011-01-13 Method and system for monitoring current-carrying capacity of cable based on distributed optical fiber temperature measuring method

Publications (1)

Publication Number Publication Date
CN102103173A true CN102103173A (en) 2011-06-22

Family

ID=44156097

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100070532A CN102103173A (en) 2011-01-13 2011-01-13 Method and system for monitoring current-carrying capacity of cable based on distributed optical fiber temperature measuring method

Country Status (1)

Country Link
CN (1) CN102103173A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102507044A (en) * 2011-11-01 2012-06-20 国网电力科学研究院 Multipoint temperature detection device for test of current-carrying capacity of cross-linked cables
CN103048557A (en) * 2012-10-24 2013-04-17 中国电力科学研究院 Testing device and testing method for allowable carrying capacity performance of OPPC (Optical Phase Conductor)
CN103226172A (en) * 2013-04-02 2013-07-31 国家电网公司 Cable ampacity analysis system based on linear temperature-sensitive technology and calculation method for cable ampacity
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
CN103728539A (en) * 2014-01-23 2014-04-16 华北电力大学(保定) Distributive optical fiber temperature measurement based cable electrical failure simulation analysis method
CN104714136A (en) * 2015-04-09 2015-06-17 国家电网公司 Method for calculating square wave carrying capacity of AC power cables
CN104750995A (en) * 2015-04-07 2015-07-01 国家电网公司 Calculation method of temperature of conductors of multi-loop soil directly buried cables
RU2598684C1 (en) * 2015-07-27 2016-09-27 Виктор Александрович Козлов Method for determining point of unauthorised connection of load to power transmission line
CN106019009A (en) * 2016-05-20 2016-10-12 国网天津市电力公司 Cable current-carrying capacity monitoring method and system base on distributed fiber temperature measurement method
CN104215865B (en) * 2014-10-04 2016-12-07 远东电缆有限公司 GE cable for locomotives big current overloading test method
CN107102240A (en) * 2017-05-19 2017-08-29 中国电力科学研究院 A kind of system and method for being used to carry out optical fiber composite low-voltage cable fault diagnosis
CN107402338A (en) * 2016-05-20 2017-11-28 国网天津市电力公司 Cable electrical failure analysis methods based on distributed optical fiber temperature measurement
CN110095696A (en) * 2019-06-14 2019-08-06 广东电网有限责任公司 A kind of current-carrying capacity of cable method of adjustment, device, equipment and readable storage medium storing program for executing
CN112394256A (en) * 2021-01-19 2021-02-23 国网江苏省电力有限公司电力科学研究院 Cable fireproof blanket current-carrying capacity influence detection platform and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010079444A (en) * 2001-07-19 2001-08-22 권문구 Real-time rating and forecast system using optical fiber sensor
CN201203487Y (en) * 2008-04-15 2009-03-04 广州岭南电缆有限公司 Distributed optical fiber on-line temperature monitoring cable
CN101672880A (en) * 2009-09-21 2010-03-17 广东电网公司广州供电局 Identification method of cable current-carrying capacity and identification device
WO2010053542A2 (en) * 2008-11-08 2010-05-14 Sensortran, Inc. System and method for determining characteristics of power cables using distributed temperature sensing systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010079444A (en) * 2001-07-19 2001-08-22 권문구 Real-time rating and forecast system using optical fiber sensor
CN201203487Y (en) * 2008-04-15 2009-03-04 广州岭南电缆有限公司 Distributed optical fiber on-line temperature monitoring cable
WO2010053542A2 (en) * 2008-11-08 2010-05-14 Sensortran, Inc. System and method for determining characteristics of power cables using distributed temperature sensing systems
CN101672880A (en) * 2009-09-21 2010-03-17 广东电网公司广州供电局 Identification method of cable current-carrying capacity and identification device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
严有祥等: "电力电缆表面温度监控和实时载流量计算系统", 《供用电》 *
国家机械工业局: "《中华人民共和国机械行业标准 JB/T 10181.1~10181.6-2000 idt IEC60287 电缆载流量计算》", 24 April 2000 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102507044A (en) * 2011-11-01 2012-06-20 国网电力科学研究院 Multipoint temperature detection device for test of current-carrying capacity of cross-linked cables
CN103048557A (en) * 2012-10-24 2013-04-17 中国电力科学研究院 Testing device and testing method for allowable carrying capacity performance of OPPC (Optical Phase Conductor)
CN103048557B (en) * 2012-10-24 2016-08-10 中国电力科学研究院 Optical phase conductor allows current-carrying capacity performance test apparatus and test method thereof
CN103226172A (en) * 2013-04-02 2013-07-31 国家电网公司 Cable ampacity analysis system based on linear temperature-sensitive technology and calculation method for cable ampacity
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
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
CN103399226B (en) * 2013-07-29 2016-04-27 中国海洋石油总公司 The monitoring device of current capacity of maritime platform cable and monitoring method
CN103728539A (en) * 2014-01-23 2014-04-16 华北电力大学(保定) Distributive optical fiber temperature measurement based cable electrical failure simulation analysis method
CN104215865B (en) * 2014-10-04 2016-12-07 远东电缆有限公司 GE cable for locomotives big current overloading test method
CN104750995A (en) * 2015-04-07 2015-07-01 国家电网公司 Calculation method of temperature of conductors of multi-loop soil directly buried cables
CN104750995B (en) * 2015-04-07 2018-04-03 国家电网公司 The computational methods of multiloop soil direct-buried cable conductor temperature
CN104714136A (en) * 2015-04-09 2015-06-17 国家电网公司 Method for calculating square wave carrying capacity of AC power cables
RU2598684C1 (en) * 2015-07-27 2016-09-27 Виктор Александрович Козлов Method for determining point of unauthorised connection of load to power transmission line
CN107402338A (en) * 2016-05-20 2017-11-28 国网天津市电力公司 Cable electrical failure analysis methods based on distributed optical fiber temperature measurement
CN106019009A (en) * 2016-05-20 2016-10-12 国网天津市电力公司 Cable current-carrying capacity monitoring method and system base on distributed fiber temperature measurement method
CN107102240A (en) * 2017-05-19 2017-08-29 中国电力科学研究院 A kind of system and method for being used to carry out optical fiber composite low-voltage cable fault diagnosis
CN110095696A (en) * 2019-06-14 2019-08-06 广东电网有限责任公司 A kind of current-carrying capacity of cable method of adjustment, device, equipment and readable storage medium storing program for executing
CN112394256A (en) * 2021-01-19 2021-02-23 国网江苏省电力有限公司电力科学研究院 Cable fireproof blanket current-carrying capacity influence detection platform and method

Similar Documents

Publication Publication Date Title
CN105829845B (en) For the measuring device and method of temperature measurement and for the sensor cable of this measuring device
CN101614602B (en) Method and device for monitoring power transmission line
CN201852564U (en) Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding
CN105181362B (en) Hydraulic structure observed seepage behavior distribution type fiber-optic perception integrated system and method
CN102778627B (en) Method and device for determining current-carrying capacity of cable
CN105136178A (en) Chaos Brillouin optical coherence domain analysis distributed optical fiber sensing device and method
CN101387670B (en) Dielectric loss on-line measurement apparatus for power capacitor
CN201885826U (en) Electromechanical equipment optical fiber online monitoring system
CN102313568B (en) The distribution type optical fiber sensing equipment that a kind of Brillouin and Raman detect simultaneously
CN103592054B (en) Cable Group core temperature determining method, device and the installation method of this device
CN102840928B (en) A kind of on-line temperature monitoring system for OPPC and monitoring method thereof
CN101819239B (en) Rapidly constructed transformer fault diagnosis system based on three-dimensional temperature field
CN102768321B (en) A kind of power cable current-carrying capacity monitoring method
CN103323167B (en) A kind of power line conductive uniaxial stress and sag monitoring method
EP2808662A1 (en) Optical fiber for temperature sensor and power device monitoring system
CN102422500B (en) Busbar trunking system, temperature monitoring system and uses thereof in wind power equipment
CN103323157B (en) Dynamic monitoring method and device of stress sensitization fiber bragg grating of locking rods of railway turnout switch machine
CN201867463U (en) Intelligent cable duct or pit on-line monitoring system
CN102089095A (en) Temperature measurement in a chill mold by a fiber optic measurement method
CN101393677B (en) Distributed type optical fiber Raman photon temperature sensing fire disaster detector
CN102411119B (en) Intelligent monitoring device for temperature and insulation state of 330KV high-voltage cable in hydropower station
CN106646097B (en) Using the deformation of transformer winding on-line monitoring system of fiber Bragg grating strain sensor
CN203310540U (en) Temperature and strain on-line monitoring device integrating optical phase conductors
US20120299603A1 (en) On-line monitoring system of insulation losses for underground power cables
CN105928634B (en) The temperature measuring device for high-voltage cable and method of the relevant domain analysis of single-ended Brillouin light

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110622