CN106500875A - The monitoring method and system of cable core temperature - Google Patents

The monitoring method and system of cable core temperature Download PDF

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Publication number
CN106500875A
CN106500875A CN201611033995.7A CN201611033995A CN106500875A CN 106500875 A CN106500875 A CN 106500875A CN 201611033995 A CN201611033995 A CN 201611033995A CN 106500875 A CN106500875 A CN 106500875A
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cable
temperature
moment
current time
information
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CN201611033995.7A
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Chinese (zh)
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CN106500875B (en
Inventor
刘益军
欧晓妹
王俊波
李恒真
肖微
罗向源
黄静
陈斯翔
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广东电网有限责任公司佛山供电局
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00Thermometers specially adapted for specific purposes

Abstract

The present invention relates to a kind of monitoring method of cable core temperature and system, the method includes:According to cable in the upper ambient temperature of moment local environment, the electric current of cable and cable temperature information, Inversion Calculation is carried out to temperature information of the cable at current time, obtain cable temperature information of the cable at current time;Cable temperature information includes the temperature value of each layer of the cable;Judge whether the core temperature value at current time was less than setting value with the absolute value of the difference of the core temperature value at a upper moment;If so, then with the cable temperature information at current time as cable temperature initial information, determine core temperature of the cable after current time.The present invention can obtain the initial temperature of each layer of cable exactly by the use of cable Real-time Monitoring Data as design conditions, and using which as initial condition, can be with exact inversion cable core temperature, so as to realize the real-time monitoring of cable core state of temperature.

Description

The monitoring method and system of cable core temperature
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of monitoring method of cable core temperature and system.
Background technology
Power cable is the important carrier of power transmission and the key equipment for ensureing operation of power networks, in the use range of China More and more extensive.Core temperature is the important parameter for determining cable service life, when the running temperature of cable core is more than a certain During particular value, the aging acceleration of cable will be caused, cable thermal breakdown when serious, may be caused, so as to cause the accidents such as electric shock, fire, This particular value is referred to as the long-term permission maximum operating temperature of cable insulation material.But if for the operation for reducing cable core Temperature, takes the strategy for making cable all the time in underrun, then the service behaviour of cable cannot be fully used.Cause This, is accurately detected to cable core temperature so that core temperature allows maximum operating temperature less than long-term, can not only be true Protect cable safely and steadly to run, and the capacity utilization of cable can be improved.
As core temperature is difficult to direct measurement, conventional art is mainly using the algorithm based on Transient Thermal Circuit model according to ring Border temperature retrieval calculates core temperature, needs the thermal capacitance for considering cable layers of material based on the algorithm of Transient Thermal Circuit model, and hot The initial temperature of appearance is often set as ambient temperature, and for the cable in be currently running, this setting easily causes initial temperature The error of degree, so as to will have a direct impact to the temperature retrieval of core so that core temperature monitoring error is larger.
Content of the invention
This is based on, the embodiment of the present invention provides a kind of monitoring method of cable core temperature, to reduce monitoring error.
For achieving the above object, the embodiment of the present invention adopts following scheme:
A kind of monitoring method of cable core temperature, comprises the steps:
According to cable in the ambient temperature of upper moment local environment, the electric current of the cable and cable temperature information, Inversion Calculation is carried out to temperature information of the cable at current time, and the cable temperature for obtaining the cable at current time is believed Breath;The cable temperature information includes the temperature value of each layer of the cable;
Compared with the cable temperature information at a upper moment according to cable temperature information of the cable at current time Compared with judging the core temperature value at current time with the absolute value of the difference of the core temperature value at a upper moment whether less than setting value;
If so, then with the cable temperature information at current time as cable temperature initial information, determine the cable current Core temperature after moment.
A kind of monitoring system of cable core temperature, including:
Inversion Calculation module, for the ambient temperature according to cable in upper moment local environment, the electric current of the cable And cable temperature information, Inversion Calculation is carried out to temperature information of the cable at current time, is obtained the cable and is being worked as The cable temperature information at front moment;The cable temperature information includes the temperature value of each layer of the cable;
Judge module, for the cable temperature information according to the cable at current time and the cable temperature at a upper moment Degree information is compared, and whether judges the absolute value of the core temperature value at current time and the difference of the core temperature value at a upper moment It is less than setting value;
Determining module, for the absolute value of the difference of the core temperature value at a moment with of the core temperature value at current time During less than setting value, with the cable temperature information at current time as cable temperature initial information, determine the cable when current Core temperature after quarter.
The present invention is entered by the use of the Real-time Monitoring Data of cable as design conditions by the difference of core temperature value before and after calculating Row is constantly revised, and can obtain the initial temperature of each layer of cable exactly, and using each layer initial temperature of cable as initial condition, Cable core temperature can be calculated with exact inversion, so as to realize the real-time monitoring of cable core state of temperature, be cable insulation shape State assessment provides reference frame.
Description of the drawings
Fig. 1 is the monitoring method schematic flow sheet in one embodiment of the cable core temperature of the present invention;
Fig. 2 is the schematic diagram of time shafts in the embodiment of the present invention;
Fig. 3 is cable to be shown in the flow process that the temperature information for monitoring initial time carries out Inversion Calculation in the embodiment of the present invention It is intended to;
Fig. 4 is the structural parameters of each layer of cable and each layer of soil, the schematic diagram of material parameter in the embodiment of the present invention;
Fig. 5 is the lumped parameter schematic diagram of each layer of cable and each layer of soil in the embodiment of the present invention;
Fig. 6 is the Transient Thermal Circuit model of cable in the embodiment of the present invention;
Fig. 7 is the schematic diagram of many step load current functions in the embodiment of the present invention;
Fig. 8 is the monitoring result comparison diagram of various cable core temperature monitoring methods;
Fig. 9 is the monitoring system structural representation in one embodiment of the cable core temperature of the present invention.
Specific embodiment
Present disclosure is described in further detail below in conjunction with preferred embodiment and accompanying drawing.Obviously, hereafter institute The embodiment of description is only used for explaining the present invention, rather than limitation of the invention.Embodiment in based on the present invention, this area are general The every other embodiment obtained under the premise of creative work is not made by logical technical staff, belongs to present invention protection Scope.Although it should be appreciated that hereinafter describing various information using term " first ", " second " etc., these are believed Breath should not necessarily be limited by these terms, and these terms are only used for same type of information is distinguished from each other out.For example, without departing from this In the case of bright scope, " first " information can also be referred to as " second " information, similar, and " second " information can also be referred to as " first " information.It also should be noted that, for the ease of description, illustrate only part related to the present invention in accompanying drawing and Not all content.
Fig. 1 is the monitoring method schematic flow sheet in one embodiment of the cable core temperature of the present invention, such as Fig. 1 institutes Show, the monitoring method of the cable core temperature in the present embodiment is comprised the following steps:
Step S110, according to cable in the ambient temperature of upper moment local environment, the electric current of the cable and cable Temperature information, carries out Inversion Calculation to temperature information of the cable at current time, obtains the cable at current time Cable temperature information;The cable temperature information includes the temperature value of each layer of the cable;
Cable is divided into multilamellar from the inside to the outside, is core, insulating barrier, semiconductor waterstop, inner sheath and oversheath successively. Time shafts with reference to shown in Fig. 2, it is assumed that monitoring initial time is t0, when being monitored to the core temperature of cable, conventional art It is by monitoring initial time t0When each layer of cable temperature value be considered as ambient temperature, Inversion Calculation is being carried out to core temperature so Time error is larger, and in the present embodiment, the Real-time Monitoring Data using cable revising the temperature value of each layer of cable, to reduce Monitoring error.Wherein, the Real-time Monitoring Data of cable includes ambient temperature T of cable current I (t) and cable local environmenth (t).In the present embodiment, current time is tn, a upper moment is tn-1, upper moment tn-1With current time tnOne time of difference Unit value, and the unit of time value is 10 minutes, that is, the time difference for going up a moment with current time is 10 minutes.
In the present embodiment, a moment t is directed ton-1, obtain ambient temperature T corresponding to whichh(tn-1) and electric current I (tn-1), then using upper moment tn-1Corresponding ambient temperature Th(tn-1) and electric current I (tn-1), and upper moment tn-1 Corresponding cable temperature information Ti(tn-1), to cable in current time tnTemperature information carry out Inversion Calculation, obtain current Moment tnCorresponding cable temperature information Ti(tn).Wherein, cable temperature information includes the temperature value of each layer of cable, for example, tnWhen Cable temperature information T at quarteri(tn) include core temperature value T1(tn), insulating barrier temperature value T2(tn), semiconductive water blocking layer temperature Value T3(tn), inner sheath temperature value T4(tn) and oversheath temperature value T5(tn).
In a kind of optional embodiment, with reference to shown in Fig. 3, step S110 comprises the following steps S201 to step S202:
Step S201, obtains the Transient Thermal Circuit model of the cable;
Step S202, according to the Transient Thermal Circuit model, the cable upper moment local environment ambient temperature, institute The electric current and cable temperature information for stating cable carries out Inversion Calculation, and the cable temperature for obtaining the cable at current time is believed Breath.
Transient Thermal Circuit model is the temperature and hot-fluid situation for representing each layer of cable and each layer of soil using circuit form, electricity The thermal resistance of each layer of cable and each layer of soil is represented with a collection entire thermal resistance relevant with structural parameters and material parameter respectively.Specifically , based on the Transient Thermal Circuit model of cable, depending on upper moment tn-1To current time tnAmbient temperature and electricity in this time period Stream is constant, is a moment tn-1Corresponding ambient temperature Th(tn-1) and electric current I (tn-1).Then according to tn-1Moment, institute was right Ambient temperature T that answersh(tn-1), electric current I (tn-1) and cable temperature information Ti(tn-1), converted by complex frequency domain and node voltage Equation carries out Inversion Calculation, obtains cable in current time tnTemperature information, that is, obtain cable temperature information Ti(tn).
Wherein, the Transient Thermal Circuit model of cable can be obtained in the following manner:
According to the structural parameters and material parameter of cable and soil, the thermal resistance and heat of each layer of cable and each layer of soil is obtained Hold, wherein, material parameter includes thermal conductivity, density and specific heat capacity.Then each layer of cable and soil are calculated according to thermal resistance and thermal capacitance The collection entire thermal resistance and lump thermal capacitance of each layer of earth, based on the Transient Thermal Circuit model that collection entire thermal resistance and lump thermal capacitance build cable.
Step S120, the cable temperature information according to the cable at current time and the cable temperature letter at a upper moment Breath is compared, and whether the core temperature value and the absolute value of the difference of the core temperature value at a upper moment for judging current time is less than Setting value;If so, step S130 is then entered;
Specifically, in the present embodiment, a upper moment is tn-1.tn-1The cable temperature information at moment can also pass through step S110 is calculated, with reference to shown in Fig. 1, Fig. 2, according to tn-1The upper moment t at momentn-2Corresponding ambient temperature Th(tn-2), electricity Stream I (tn-2) and cable temperature information Ti(tn-2), to cable in tn-1The temperature information at moment carries out Inversion Calculation, so as to obtain Obtain tn-1Cable temperature information T at momenti(tn-1)..Another embodiment in the monitoring method of cable core temperature of the present invention In, if upper moment tn-1For monitoring initial time t0, then go up cable temperature information T at a momenti(tn-1) in each layer of cable temperature Angle value is t0When cable local environment ambient temperature.
Calculating current time tnCable temperature information Ti(tn) after, by cable temperature information Ti(tn) with have calculated that Upper moment tn-1Corresponding cable temperature information Ti(tn-1) be compared, judge cable temperature information Ti(tn) in core Temperature value T1(tn) and cable temperature information Ti(tn-1) in core temperature value T1(tn-1) difference absolute value whether less than setting Value, that is, judge whether following formula meets:
|T1(tn)-T1(tn-1) | < TD(1)
In formula (1), TDFor setting value, optionally, T in the present embodimentDValue is 0.01 DEG C.If formula (1) meets, then it is assumed that Meet the condition of convergence.
Step S130, with the cable temperature information at current time as cable temperature initial information, determines that the cable is being worked as Core temperature after the front moment.
When formula (1) meets, with cable temperature information T at current timei(tn) as cable temperature initial information, after According to cable temperature information Ti(tn) carry out Inversion Calculation, you can determine cable in current time tnThe core at each moment afterwards Temperature.
If formula (1) is unsatisfactory for, subsequent time t is directed ton+1(i.e. current time t on a timelinenWhen differing one Between unit value Δ t, and after current time), repeat step S110 to step S130, i.e., using tnEnvironment corresponding to moment Temperature Th(tn) and electric current I (tn), to cable in tn+1The temperature information at moment carries out Inversion Calculation, obtains cable temperature information Ti (tn+1), and judge Ti(tn+1) in core temperature value T1(tn+1) and T1(tn) the absolute value of difference whether be less than setting value.Logical This circulation manner of comparison is crossed, the cable temperature information for meeting the condition of convergence is searched out, and using this cable temperature information as electricity Cable temperature initial information, can determine that the core temperature of cable after Inversion Calculation.
The embodiment of the present invention by the use of the Real-time Monitoring Data of cable as design conditions, by core temperature value before and after calculating Difference constantly revised, can obtain the initial temperature of each layer of cable exactly, and using each layer initial temperature of cable as first Beginning condition, can be cable insulation with exact inversion cable core temperature so as to realize the real-time monitoring of cable core state of temperature State estimation provides reference frame.
It should be noted that for aforesaid each method embodiment, for easy description, which is all expressed as a series of Combination of actions, but those skilled in the art should know, and the present invention is not limited by described sequence of movement, because according to According to the present invention, some steps can be carried out using other orders or simultaneously.
The monitoring method of the cable core temperature of the present invention is made into one by taking 110kV single plow-in cables as an example below Step explanation.
For 110kV single plow-in cables, it is to obtain its Transient Thermal Circuit model, calculates each layer of cable first and soil is each The collection total heat LUSHEN number of layer, including collecting entire thermal resistance and lump thermal capacitance.In this example, from the core of cable to totally 7 layers of soil horizon, Cable is core, insulating barrier (being cross-linked polyethylene layer in this example), semiconductor waterstop, inner sheath (this from inside to outside respectively It is aluminium sheath layer in embodiment) and oversheath, soil includes sand stone layer and soil horizon.The each layer of cable and the structure of each layer of soil Parameter (thickness) and material parameter (thermal conductivity, density and specific heat capacity) are shown in Fig. 4.Joined according to the structural parameters in Fig. 4 and material Number, the collection entire thermal resistance and lump thermal capacitance for obtaining each layer using collection total heat LUSHEN number computing formula, result of calculation are as shown in Figure 5.So The Transient Thermal Circuit model of cable is built according to the collection total heat LUSHEN number of each layer of cable in Fig. 5 and each layer of soil afterwards.With reference to shown in Fig. 6 Cable Transient Thermal Circuit model in, wherein WcFor core heating flow source, C1For insulating barrier thermal capacitance, C2For semiconductor waterstop thermal capacitance, C3 For aluminium sheath thermal capacitance, C4For oversheath thermal capacitance, C5For sand stone layer thermal capacitance, C6For soil horizon thermal capacitance;R1For insulating barrier thermal resistance, R2For half Conductive waterstop thermal resistance, R3For aluminium sheath thermal resistance, R4For oversheath thermal resistance, R5For sand stone layer thermal resistance, R6For soil horizon thermal resistance;T1For Core temperature, T2For insulating barrier temperature, T3For semiconductor waterstop temperature, T4For aluminium sheath temperature, T5For oversheath temperature, T6For Sand stone layer temperature, T7For ambient temperature.Wherein, as the material of core is copper, and the heat conductivity of copper is very big, and thermal resistance is very Little, therefore in the Transient Thermal Circuit model of cable, the thermal resistance of core can be ignored.
In this example, ambient temperature maintains 30 DEG C, and cable current value is 1000A, before being monitored, current stabilization In 700A, and set monitoring initial time t0=0h (h represents hour), hereafter electric current respectively with 100A as interval from 800A to 1000A values, wherein, 800A and 900A maintains 8h, 1000A to maintain 24 hours, many step load current functions such as Fig. 7 institutes Show.Through many experiments, setting value TD0.01 DEG C is preferably taken.
The monitoring method of the cable core temperature for being provided according to embodiments of the present invention, it is assumed that unit of time value Δ t takes 10min (min represents minute), is directed to and t0The moment t of one Δ t of difference1, i.e. t1=10min, using t0Moment is corresponding Ambient temperature and electric current, based on the Transient Thermal Circuit model of cable, by complex frequency domain conversion and nodal voltage equation to t1Moment Temperature information carries out Inversion Calculation, obtains t1Cable temperature information T at momenti(t1), and determine core temperature value T therein1 (t1) it is 32.5453 DEG C, through comparing:
|T1(t1)-T1(t0) |=2.5153>0.01
Wherein T1(t0) represent t0When cable core temperature value, the value takes 30 DEG C of ambient temperature.Convergence is judged by above formula Condition is unsatisfactory for, therefore carries out second calculating, chooses subsequent time t2, t2On a timeline with t1One unit of time value of difference Δ t, and in t1After moment, i.e. t2=20min, determines t1Moment corresponding ambient temperature and electric current, and according to t1Moment is corresponding Ambient temperature, electric current and cable temperature information calculate t2The cable temperature information at moment, then constantly repeats above-mentioned calculating Step, when the 104th calculating is carried out, t104=17h20min, according to t103Moment corresponding ambient temperature, electric current and cable Temperature information, calculates t104Cable temperature information T at momenti(t104), by itself and t103Cable temperature information T at momenti(t103) It is compared, judges cable temperature information Ti(t104) in core temperature value T1(t104) and cable temperature information Ti(t103) in Core temperature value T1(t103) difference absolute value be less than setting value TD, i.e.,:
|T1(t104)-T1(t103) |=0.009 < 0.01
Therefore the condition of convergence meets, can be by Ti(t104) as cable temperature initial information, hereafter initially believed with the cable temperature Breath is to t104Cable core temperature afterwards is monitored, and can obtain more accurately monitoring result.With Ti(t104) as cable In the result such as Fig. 8 of temperature initial information calculating core temperature shown in curve 2.In fig. 8, curve 3 be using ambient temperature as The core temperature monitoring result of each layer initial temperature of cable, curve 1 are core temperature actual value.As can be seen from Figure 8, with ring Border temperature differs larger as the core temperature result of calculation of each layer initial temperature with actual value, and error is concentrated mainly on calculating Initial period, and based on the present embodiment in method, rear monitoring accuracy is modified to each layer initial temperature of cable and is carried significantly Height, relative error is within 5%, it can be seen that the accuracy of cable core temperature checking method provided by the present invention, can be with Meet requirement of engineering.
According to the monitoring method of the cable core temperature of the invention described above, the present invention also provides a kind of cable core temperature Monitoring system, below in conjunction with the accompanying drawings and preferred embodiment is illustrated to the monitoring system of cable core temperature of the present invention.
Fig. 9 is the monitoring system structural representation in one embodiment of the cable core temperature of the present invention.Such as Fig. 9 institutes Show, the monitoring system of the cable core temperature in the embodiment includes:
Inversion Calculation module 10, for the electric current of cable described in the ambient temperature according to cable in upper moment local environment And cable temperature information, Inversion Calculation is carried out to temperature information of the cable at current time, is obtained the cable and is being worked as The cable temperature information at front moment;The cable temperature information includes the temperature value of each layer of the cable;
Judge module 20, for the cable temperature information according to the cable at current time and the cable at a upper moment Temperature information is compared, and the core temperature value and the absolute value of the difference of the core temperature value at a upper moment for judging current time is No less than setting value;
Determining module 30, for the core temperature value at current time with the difference of the core temperature value at a moment absolute When value is less than setting value, with the cable temperature information at current time as cable temperature initial information, determine the cable current Core temperature after moment.
In a kind of optional embodiment, if a upper moment was monitoring initial time, the cable temperature at a upper moment The temperature value of each layer of cable in information, is ambient temperature of the cable in monitoring initial time local environment.
In a kind of optional embodiment, the upper moment is 10 minutes with the time difference at current time.
Optionally, the setting value is 0.01 DEG C.
In a kind of optional embodiment, referring now still to shown in Fig. 9, Inversion Calculation module 20 includes:
Model acquisition module 201, for obtaining the Transient Thermal Circuit model of the cable;
Computing module 202, for according to the Transient Thermal Circuit model, the cable upper moment local environment environment Temperature, the electric current of the cable and cable temperature information carry out Inversion Calculation, obtain cable of the cable at current time Temperature information..
The prison of the cable core temperature provided by the executable embodiment of the present invention of the monitoring system of above-mentioned cable core temperature Survey method, possesses the corresponding functional module of execution method and beneficial effect.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously Therefore can not be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.

Claims (10)

1. a kind of monitoring method of cable core temperature, it is characterised in that comprise the steps:
According to cable in the ambient temperature of upper moment local environment, the electric current of the cable and cable temperature information, to institute Stating temperature information of the cable at current time carries out Inversion Calculation, obtains cable temperature information of the cable at current time; The cable temperature information includes the temperature value of each layer of the cable;
It was compared with the cable temperature information at a upper moment according to cable temperature information of the cable at current time, is sentenced Whether the core temperature value at disconnected current time was less than setting value with the absolute value of the difference of the core temperature value at a upper moment;
If so, then with the cable temperature information at current time as cable temperature initial information, determine the cable at current time Core temperature afterwards.
2. the monitoring method of cable core temperature according to claim 1, it is characterised in that if the upper moment is prison Survey initial time, then in the cable temperature information at a upper moment each layer of cable temperature value, be the cable described The ambient temperature of monitoring initial time local environment.
3. the monitoring method of cable core temperature according to claim 1 and 2, it is characterised in that the upper moment with The time difference at current time is 10 minutes.
4. the monitoring method of cable core temperature according to claim 1 and 2, it is characterised in that the setting value is 0.01℃.
5. the monitoring method of cable core temperature according to claim 1 and 2, it is characterised in that according to cable upper The ambient temperature of moment local environment, the electric current of the cable and cable temperature information, to the cable at current time Temperature information carries out the process of Inversion Calculation and comprises the steps:
Obtain the Transient Thermal Circuit model of the cable;
The electric current of ambient temperature, the cable according to the Transient Thermal Circuit model, the cable in upper moment local environment And cable temperature information carries out Inversion Calculation, cable temperature information of the cable at current time is obtained.
6. a kind of monitoring system of cable core temperature, it is characterised in that include:
Inversion Calculation module, for according to cable the ambient temperature of upper moment local environment, the electric current of the cable and Cable temperature information, carries out Inversion Calculation to temperature information of the cable at current time, and the acquisition cable is when current The cable temperature information at quarter;The cable temperature information includes the temperature value of each layer of the cable;
Judge module, for the cable temperature information according to the cable at current time and the cable temperature letter at a upper moment Breath is compared, and whether the core temperature value and the absolute value of the difference of the core temperature value at a upper moment for judging current time is less than Setting value;
Determining module, in the core temperature value at current time, the absolute value of the difference of the core temperature value at a moment is less than with During setting value, with the cable temperature information at current time as cable temperature initial information, determine the cable current time it Core temperature afterwards.
7. the monitoring system of cable core temperature according to claim 6, it is characterised in that if the upper moment is prison Survey initial time, then in the cable temperature information at a upper moment each layer of cable temperature value, be the cable described The ambient temperature of monitoring initial time local environment.
8. the monitoring system of the cable core temperature according to claim 6 or 7, it is characterised in that the upper moment with The time difference at current time is 10 minutes.
9. the monitoring system of the cable core temperature according to claim 6 or 7, it is characterised in that the setting value is 0.01℃.
10. the monitoring system of the cable core temperature according to claim 6 or 7, it is characterised in that the Inversion Calculation mould Block includes:
Model acquisition module, for obtaining the Transient Thermal Circuit model of the cable;
Computing module, for according to the Transient Thermal Circuit model, the cable upper moment local environment ambient temperature, institute The electric current and cable temperature information for stating cable carries out Inversion Calculation, and the cable temperature for obtaining the cable at current time is believed Breath.
CN201611033995.7A 2016-11-14 2016-11-14 The monitoring method and system of cable core temperature CN106500875B (en)

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Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
CN104776938A (en) * 2015-04-14 2015-07-15 武汉大学 Cable-joint cable core temperature inversion method and system on basis of surface temperature of cable
CN104792435A (en) * 2015-04-21 2015-07-22 中国空气动力研究与发展中心计算空气动力研究所 Method for reconstructing nonuniform temperature field inside structure and based on transient-state thermal boundary inversion

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