CN115371837A - Temperature detection method, device and system for power cable and storage medium - Google Patents
Temperature detection method, device and system for power cable and storage medium Download PDFInfo
- Publication number
- CN115371837A CN115371837A CN202211308947.XA CN202211308947A CN115371837A CN 115371837 A CN115371837 A CN 115371837A CN 202211308947 A CN202211308947 A CN 202211308947A CN 115371837 A CN115371837 A CN 115371837A
- Authority
- CN
- China
- Prior art keywords
- cable
- target
- temperature
- segment
- temperature value
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 78
- 230000003287 optical effect Effects 0.000 claims abstract description 89
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims description 37
- 238000009529 body temperature measurement Methods 0.000 claims description 24
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000012163 sequencing technique Methods 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 abstract description 10
- 238000001069 Raman spectroscopy Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to the technical field of optical fiber sensing, and discloses a method, a device and a system for detecting the temperature of a power cable and a storage medium, which are used for detecting the temperature of the power cable. The temperature detection method of the power cable comprises the following steps: acquiring a target temperature data set of a target power cable through a temperature sensing optical cable, wherein the target temperature data set comprises a target cable section temperature value of a target cable section position point on a target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in a target cable joint; calculating the temperature values of the candidate cable joints to obtain a target cable joint temperature value of a target cross section; if the temperature value of the target cable joint is greater than or equal to a first threshold value, generating first early warning information; calculating a target cable segment temperature increase rate corresponding to a target cable segment position point in the target cable segment based on the target cable segment temperature value; and if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, generating second early warning information.
Description
Technical Field
The invention relates to the technical field of optical fiber sensing, in particular to a temperature detection method, a temperature detection device, a temperature detection system and a storage medium for a power cable.
Background
The power cable is a cable with a large wire diameter, three cores or four cores generally, thicker interphase insulation and metal armor protection on the outer side, and is mainly used for a power supply system as a main line of three-phase industrial power or single-phase civil power.
In electric power systems, a large number of power cables are used to transmit information and energy, and the power cables can be said to be important components of the electric power systems. Generally, the power cable needs to work continuously for a long time, and burning accidents caused by aging are easy to happen. Usually, before such accidents occur, most cables are subjected to a process that the temperature rises from slow to rapid, and power cable operation managers cannot find that the temperature of the power cables rises rapidly in time, so that insulation breakdown short circuit is caused, inflammable substances are ignited at high temperature, and a fire disaster is formed.
Disclosure of Invention
The invention provides a method, a device and a system for detecting the temperature of a power cable and a storage medium, which are used for detecting the temperature of the power cable.
The invention provides a temperature detection method of a power cable in a first aspect, which comprises the following steps: acquiring a target temperature data set of a target power cable through the temperature sensing optical cable, wherein the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is laid on the side surface of the target cable section in parallel, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode; calculating the candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section; if the temperature value of the target cable joint is larger than or equal to a first threshold value, generating first early warning information, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk; calculating a target cable segment temperature increase rate corresponding to the target cable segment position point in the target cable segment based on the target cable segment temperature value; and if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, generating second early warning information, wherein the second early warning information comprises the position information of the position point of the target cable segment and is used for indicating that the position point of the target cable segment has a combustion risk.
In a possible embodiment, the calculating the candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section includes: sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence; eliminating the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence to obtain a target temperature value sequence; generating an average temperature value of the target cross section based on the target temperature value sequence, and determining the average temperature value as a target cable joint temperature value of the target cross section.
In a possible embodiment, the calculating the candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section includes: sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence; calculating a cable joint temperature difference value between the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence; and if the cable joint temperature difference value is greater than or equal to a first preset temperature difference value, determining the maximum candidate cable joint temperature value as a target cable joint temperature value of the target cross section.
In a possible implementation, after the acquiring a target temperature data set of a target power cable through the temperature sensitive optical cable, the method further includes: performing region division based on the position information of the target cable segment to obtain a plurality of cable segment sub-regions, wherein the cable segment sub-regions comprise a plurality of sub-region position points; acquiring a first cable segment temperature value of a first sub-region position point in a target cable segment sub-region and a second cable segment temperature value of a second sub-region position point, wherein the first cable segment temperature value is the highest temperature value of the target cable segment sub-region, and the second cable segment temperature value is the lowest temperature value of the target cable segment sub-region; generating a corresponding first cable segment temperature difference value based on the first cable segment temperature value and the second cable segment temperature value; and if the temperature difference value of the first cable segment is greater than or equal to a second preset temperature difference value, generating third early warning information, wherein the third early warning information comprises position information of the target cable segment sub-region, and the third early warning information is used for indicating that the target cable segment sub-region has a combustion risk.
In one possible embodiment, the calculating a target cable segment temperature increase rate corresponding to the target cable segment location point in the target cable segment based on the target cable segment temperature value includes: recording a first moment corresponding to the target cable segment temperature value; acquiring a cable segment temperature value of the target cable segment position point at a second moment, wherein the second moment is greater than the first moment; generating a second cable segment temperature difference value of the target cable segment position point based on the cable segment temperature value at the second moment and the target cable segment temperature value; generating a time difference value of the target cable segment position point based on the second time and the first time; and generating a target cable segment temperature increase rate of the target cable segment position point based on the second cable segment temperature difference value and the time difference value.
In a possible implementation mode, the cable section is provided with a temperature-sensing optical cable allowance ring with a preset length at intervals of a preset distance; the temperature sensing optical cable allowance ring is used for detecting the environment temperature of the environment where the target power cable is located.
In a possible embodiment, after the acquiring a target temperature data set of a target power cable by the temperature-sensitive optical cable, the method further includes: acquiring an environmental temperature value of a position point of the target cable section through a temperature sensing optical cable allowance ring; if the target cable segment position point meets a preset condition, generating fourth early warning information, wherein the preset condition is used for indicating that the target cable segment temperature value is larger than or equal to a preset temperature value, the target cable segment temperature value is larger than the environment temperature value, the fourth early warning information comprises the position information of the target cable segment position point, and the fourth early warning information is used for indicating that the target cable segment position point has a combustion risk.
A second aspect of the present invention provides a temperature detection apparatus for a power cable, including: the system comprises a first acquisition module, a first processing module and a second acquisition module, wherein the first acquisition module is used for acquiring a target temperature data set of a target power cable through a temperature sensing optical cable, the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is parallelly laid on the side surface of the target cable section, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode; the first calculation module is used for calculating the candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section; the first generation module is used for generating first early warning information if the temperature value of the target cable joint is greater than or equal to a first threshold value, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk; the second calculation module is used for calculating the temperature increase rate of the target cable segment corresponding to the target cable segment position point in the target cable segment based on the target cable segment temperature value; and the second generation module is used for generating second early warning information if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, wherein the second early warning information comprises the position information of the position point of the target cable segment, and the second early warning information is used for indicating that the position point of the target cable segment has a combustion risk.
In a possible implementation manner, the first computing module is specifically configured to: sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence; eliminating the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence to obtain a target temperature value sequence; generating an average temperature value of the target cross section based on the target temperature value sequence, and determining the average temperature value as a target cable joint temperature value of the target cross section.
In a possible implementation manner, the first computing module is specifically configured to: sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence; calculating a cable joint temperature difference value between the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence; and if the cable joint temperature difference value is greater than or equal to a first preset temperature difference value, determining the maximum candidate cable joint temperature value as a target cable joint temperature value of the target cross section.
In one possible embodiment, the temperature detection device of the power cable further includes: the area division module is used for carrying out area division based on the position information of the target cable segment to obtain a plurality of cable segment sub-areas, and each cable segment sub-area comprises a plurality of sub-area position points; the second acquisition module is used for acquiring a first cable segment temperature value of a first sub-region position point in a target cable segment sub-region and a second cable segment temperature value of a second sub-region position point, wherein the first cable segment temperature value is the highest temperature value of the target cable segment sub-region, and the second cable segment temperature value is the lowest temperature value of the target cable segment sub-region; the third generation module is used for generating a corresponding first cable section temperature difference value based on the first cable section temperature value and the second cable section temperature value; and the fourth generation module is used for generating third early warning information if the temperature difference value of the first cable section is greater than or equal to a second preset temperature difference value, wherein the third early warning information comprises the position information of the target cable section subregion, and the third early warning information is used for indicating that the target cable section subregion has a combustion risk.
In a possible implementation manner, the second computing module is specifically configured to: recording a first moment corresponding to the target cable segment temperature value; acquiring a cable segment temperature value of the target cable segment position point at a second moment, wherein the second moment is greater than the first moment; generating a second cable segment temperature difference value of the target cable segment position point based on the cable segment temperature value at the second moment and the target cable segment temperature value; generating a time difference value of the target cable segment position point based on the second time and the first time; and generating a target cable segment temperature increase rate of the target cable segment position point based on the second cable segment temperature difference value and the time difference value.
In a possible implementation mode, the cable section is provided with a temperature-sensing optical cable allowance ring with a preset length at intervals of a preset distance; the temperature sensing optical cable allowance ring is used for detecting the environment temperature of the environment where the target power cable is located.
In one possible embodiment, the temperature detection device of the power cable further includes: the third acquisition module is used for acquiring the environmental temperature value of the position point of the target cable segment through the temperature sensing optical cable allowance ring; and the fifth generation module is used for generating fourth early warning information if the target cable segment position point meets a preset condition, the preset condition is used for indicating that the target cable segment temperature value is greater than or equal to a preset temperature value, the target cable segment temperature value is greater than the environmental temperature value, the fourth early warning information comprises the position information of the target cable segment position point, and the fourth early warning information is used for indicating that the target cable segment position point has a combustion risk.
The third aspect of the present invention provides a temperature detection system for a power cable, where the temperature detection system for a power cable includes a temperature-sensing optical cable, a temperature measurement host and a monitoring management platform, and the temperature measurement host includes: the monitoring management platform is used for displaying a temperature data set acquired by the temperature sensing optical cable; the at least one processor invokes the instructions in the memory to cause the power cable temperature detection system to perform the power cable temperature detection method described above.
A fourth aspect of the present invention provides a computer-readable storage medium having stored therein instructions that, when run on the temperature detection system of the power cable, cause the temperature detection system of the power cable to execute the above-described temperature detection method of the power cable.
According to the technical scheme, a target temperature data set of a target power cable is obtained through a temperature sensing optical cable, the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is parallelly laid on the side face of the target cable section, and the temperature sensing optical cable is laid on the side face of the target cable joint in a double-ring turn-back laying mode; calculating the temperature values of the candidate cable joints to obtain a target cable joint temperature value of a target cross section; if the temperature value of the target cable joint is larger than or equal to a first threshold value, generating first early warning information, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk; calculating a target cable segment temperature increase rate corresponding to a target cable segment position point in the target cable segment based on the target cable segment temperature value; and if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, generating second early warning information, wherein the second early warning information comprises position information of the position point of the target cable segment and is used for indicating that the position point of the target cable segment has a combustion risk. In the embodiment of the invention, whether the position point of the target cable section and the target cable joint have combustion risks or not is judged by acquiring the target cable section temperature value of the position point of the target cable section on the target cable section and the plurality of candidate cable joint temperature values corresponding to the target cross section in the target cable joint, so that the detection of the temperature of the power cable is realized, different paving modes are adopted for the target cable section and the target cable joint, and the accuracy of temperature data is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a method for detecting the temperature of a power cable according to an embodiment of the invention;
FIG. 2 is a schematic diagram of another embodiment of a method for detecting the temperature of a power cable according to an embodiment of the invention;
FIG. 3 is a schematic view of an embodiment of the temperature-sensitive optical cable laid in parallel on the side of the target cable section according to the embodiment of the present invention;
FIG. 4 is a schematic view of an embodiment of a temperature-sensitive optical cable laid on a side surface of a target cable joint in a double-loop turn-back manner according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an embodiment of a temperature detection device of a power cable in an embodiment of the invention;
FIG. 6 is a schematic diagram of another embodiment of a temperature detection device of a power cable in an embodiment of the invention;
fig. 7 is a schematic diagram of an embodiment of a temperature detection system of a power cable in an embodiment of the invention.
Detailed Description
The invention provides a method, a device and a system for detecting the temperature of a power cable and a storage medium, which are used for detecting the temperature of the power cable.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For the sake of understanding, the following describes a specific flow of an embodiment of the present invention, and referring to fig. 1, an embodiment of a method for detecting a temperature of a power cable according to an embodiment of the present invention includes:
101. acquiring a target temperature data set of a target power cable through a temperature sensing optical cable, wherein the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is parallelly laid on the side surface of the target cable section, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode;
it is understood that the executing body of the present invention may be a temperature detecting device of a power cable, and may also be a temperature detecting system of a power cable, which is not limited herein. The embodiment of the present invention is described by taking a temperature detection system of a power cable as an implementation subject.
The target power cable comprises a plurality of cable sections and a plurality of cable joints, and real-time temperature detection of the cable sections and the cable joints can be achieved.
The Temperature detection system of the power cable comprises a Temperature Sensing optical cable, a Temperature measurement host and a monitoring management platform, the Temperature measurement host of the Distributed optical fiber Temperature measurement system (DTS) is adopted in the embodiment of the invention, other types of Temperature measurement hosts can also be adopted, and the DTS is not limited herein, the Distributed optical fiber Temperature measurement system DTS is based on the sensitivity of raman scattering light to Temperature, namely the backward raman scattering Temperature effect of the optical fiber, which is generated due to energy exchange between the thermal motion of molecules in the optical fiber and photon interaction, specifically, photons are emitted again after being absorbed by optical fiber molecules, if a part of light energy is converted into heat energy, light with a wavelength larger than the original wavelength, namely stokes light, is emitted, on the contrary, if a part of heat energy is converted into light energy, light with a wavelength smaller than the original wavelength, namely, the stokes light is emitted, namely, the anti-stokes light is emitted, the raman scattering light is composed of the two different wavelengths of light, therefore, the intensity of the raman scattering light is related to Temperature, namely, the intensity of the raman reflection point is higher, and the intensity of the raman reflection light can be obtained, thus the Temperature of the cable section can be calculated, and the target Temperature of the target cable section can be detected, thereby realizing the detection. The monitoring management platform can display a temperature data set acquired by the temperature sensing optical cable and can also receive early warning information sent by the temperature measurement host, so that monitoring management personnel can be reminded in time.
The DTS temperature measurement host adopted by the embodiment of the invention is provided with 8 detection channels, each detection channel can be connected with a temperature sensing optical cable, and each power cable is correspondingly paved with a temperature sensing optical cable, for example, the farthest measurement distance of the DTS temperature measurement host is 10 kilometers, the temperature sampling interval is 1 meter, the specific temperature sampling interval can be set according to the practical application scene, the positioning precision is +/-1 meter, the temperature measurement range is [ -20, 160], the temperature unit is centigrade, the temperature precision is +/-1 centigrade, the temperature resolution is 0.1 centigrade, the measurement time of each detection channel is 5 seconds, and the specific measurement time can be set according to the practical application scene; the operating characteristic information includes: (1) the working temperature is [0, 40], (2) the storage temperature is [ 10, 60], (3) the working humidity is 0-95% and no condensation, (4) the working altitude is less than 4 kilometers, (5) the optical fiber type is (50/62.5)/165 multimode optical fiber, (6) the optical fiber interface is FC/APC, FC is used for representing circular belt thread, APC is used for representing the angle of 8 degrees and is ground and polished by a microsphere surface; the size (width, height and length) is 482, 177, 480mm, the weight is 16.5 kg, the communication interfaces are a Serial communication interface RS232, an Ethernet and a Universal Serial Bus (USB), the power supply is 220V alternating current, and the laser radiation level is class I.
102. Calculating the temperature values of the candidate cable joints to obtain a target cable joint temperature value of a target cross section;
it can be understood that the target cross section corresponds to the same position of the target cable joint, and the temperature-sensing optical cable is laid on the side surface of the target cable joint in a double-loop turn-back laying mode, so that the target cross section has a plurality of candidate cable joint temperature values.
103. If the temperature value of the target cable joint is larger than or equal to a first threshold value, first early warning information is generated, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk;
it is understood that the first threshold may be 60 degrees celsius or 65 degrees celsius, and the specific first threshold may be set according to an actual application scenario.
104. Calculating a target cable segment temperature increase rate corresponding to a target cable segment position point in the target cable segment based on the target cable segment temperature value;
since the power cable may have a temperature that rises from a slow temperature to a sharp temperature before burning, it is possible to determine whether the target cable segment will burn by determining the rate of temperature increase of the target cable segment.
105. And if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, generating second early warning information, wherein the second early warning information comprises position information of the position point of the target cable segment and is used for indicating that the position point of the target cable segment has a combustion risk.
It can be understood that the second threshold may be 5 degrees celsius per minute or 6 degrees celsius per minute, and the specific second threshold may be set according to an actual application scenario.
In the embodiment of the invention, whether the combustion risk exists in the target cable section position point and the target cable joint is judged by acquiring the target cable section temperature value of the target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to the target cross section in the target cable joint, so that the detection of the power cable temperature is realized, different paving modes are adopted for the target cable section and the target cable joint, and the accuracy of temperature data is improved.
Referring to fig. 2, another embodiment of the method for detecting the temperature of the power cable according to the embodiment of the present invention includes:
201. acquiring a target temperature data set of a target power cable through a temperature sensing optical cable, wherein the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is laid on the side surface of the target cable section in parallel, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode;
it should be noted that, a temperature measurement host of the temperature detection system of the power cable acquires a temperature data set through the temperature sensing optical cable, the temperature measurement host processes the temperature data set, the temperature measurement host sends the processed temperature data set to the monitoring management platform, and the monitoring management platform displays the processed temperature data set.
The temperature sensing optical cable is laid on the side surface of the target cable section in parallel, the temperature sensing optical cable needs to be in close contact with the cable outer sheath of the target cable section, as shown in fig. 3, the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode, the temperature sensing optical cable needs to be in close contact with the cable outer sheath of the target cable joint, as shown in fig. 4, the middle joint of the target cable joint is a highest temperature center, the temperature is in an elliptical radiation diffusion shape towards the periphery, and the lowest temperature is reached at two ends of the cable outer sheath of the target cable joint.
Note that a double-loop turn-back laying method is also adopted at the leading end and the trailing end of the target power cable.
The ligature fixed mode of temperature sensing optical cable is detachable, and the interval is 100 centimetres, and specific interval can also set up according to the practical application scene, for example, if there is cable mounting fixture, then need adopt leap formula to lay temperature sensing optical cable, uses the bandage to carry out the ligature respectively in anchor clamps both sides 10cm to 20cm department. When the temperature sensing optical cable turns, the corresponding bending radius is larger than 5 cm. An optical cable joint box is needed to be adopted at the joint of the temperature sensing optical cable, the optical cable joint box has high waterproof sealing performance, and the optical cable joint box is fixed at a high position and cannot be placed on the ground or a support. And aluminum signs are hung at the initial end, the cable joint and the tail end of the power cable and on the temperature sensing optical cables at the bottom of the cabinet, and the aluminum signs mark temperature measurement objects, areas where the temperature measurement objects are located, length and other information.
202. Sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence;
for example, the plurality of candidate cable joint temperature values are: 51 degrees centigrade, 52 degrees centigrade, 53 degrees centigrade, 54 degrees centigrade and 50 degrees centigrade, the temperature detection system of the power cable sorts the candidate cable joint temperature values according to the sequence of temperature values from large to small to obtain an initial temperature value sequence, wherein the initial temperature value sequence is as follows: 50 degrees celsius, 51 degrees celsius, 52 degrees celsius, 53 degrees celsius, 54 degrees celsius.
203. Eliminating the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence to obtain a target temperature value sequence;
for example, based on the example of step 202, the temperature detection system of the power cable eliminates the maximum candidate cable joint temperature value of 54 degrees celsius and the minimum candidate cable joint temperature value of 50 degrees celsius in the initial temperature value sequence to obtain a target temperature value sequence, where the target temperature value sequence is: 51 degrees celsius, 52 degrees celsius, 53 degrees celsius.
204. Generating an average temperature value of the target cross section based on the target temperature value sequence, and determining the average temperature value as a target cable joint temperature value of the target cross section;
for example, based on the example of step 203, the temperature detection system of the power cable generates an average temperature value of 52 degrees celsius for the target cross-section based on the sequence of target temperature values, and determines the average temperature value of 52 degrees celsius as the target cable joint temperature value for the target cross-section.
205. If the temperature value of the target cable joint is larger than or equal to a first threshold value, generating first early warning information, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk;
for example, based on the example of step 204, the target cable joint temperature value is 52 degrees celsius, if the first threshold is 45 degrees celsius, the target cable joint temperature value is greater than the first threshold, the temperature detection system of the power cable generates first warning information, the first warning information includes position information of the target cable joint, the position information of the target cable joint is the length of the temperature-sensing optical cable from the temperature measurement host to the target cable joint, for example, 100 meters, and the first warning information is used to indicate that the target cable joint has a combustion risk.
206. Calculating a target cable segment temperature increase rate corresponding to a target cable segment position point in the target cable segment based on the target cable segment temperature value;
specifically, (1) a temperature detection system of the power cable records a first moment corresponding to a temperature value of a target cable section; (2) A temperature detection system of the power cable acquires a cable section temperature value of a target cable section position point at a second moment, wherein the second moment is greater than the first moment; (3) The temperature detection system of the power cable generates a second cable section temperature difference value of the target cable section position point based on the cable section temperature value at the second moment and the target cable section temperature value; (4) The temperature detection system of the power cable generates a time difference value of the position point of the target cable section based on the second moment and the first moment; (5) And the temperature detection system of the power cable generates a target cable section temperature increase rate of the target cable section position point based on the second cable section temperature difference value and the time difference value.
For example, a temperature detection system of a power cable records a first moment corresponding to a target cable segment temperature value, the target cable segment temperature value is 50 degrees celsius, the first moment is 15: 5 degrees celsius per minute.
207. And if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, generating second early warning information, wherein the second early warning information comprises position information of the position point of the target cable segment and is used for indicating that the position point of the target cable segment has a combustion risk.
For example, based on the example of step 206, the target cable segment temperature increase rate is: the temperature detection system of the power cable generates second early warning information, the second early warning information comprises position information of a target cable segment position point, the position information of the target cable segment position point is the length of the temperature sensing optical cable from the temperature measurement host to the target cable segment position point, and if 200 meters, the second early warning information is used for indicating that the target cable segment position point has a combustion risk.
In a feasible implementation mode, (1) the temperature detection system of the power cable sorts a plurality of candidate cable joint temperature values according to the order of the temperature values from large to small to obtain an initial temperature value sequence; (2) The temperature detection system of the power cable calculates a cable joint temperature difference value between the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence; (3) And if the cable joint temperature difference value is greater than or equal to the first preset temperature difference, determining the maximum candidate cable joint temperature value as a target cable joint temperature value of the target cross section by the temperature detection system of the power cable.
The first preset temperature difference can be 5 degrees centigrade or 6 degrees centigrade, and the specific first preset temperature difference can be set according to the actual application scene.
For example, the plurality of candidate cable joint temperature values are: 52 ℃, 53 ℃, 54 ℃, 55 ℃ and 51 ℃, and the temperature detection system of the power cable sorts the candidate cable joint temperature values according to the sequence of temperature values from large to small to obtain an initial temperature value sequence, wherein the initial temperature value sequence is as follows: 51 ℃, 52 ℃, 53 ℃, 54 ℃ and 55 ℃, calculating a cable joint temperature difference value between a maximum candidate cable joint temperature value and a minimum candidate cable joint temperature value in an initial temperature value sequence by a temperature detection system of the power cable, wherein the cable joint temperature difference value is 4 ℃, if a first preset temperature difference is 3 ℃, the cable joint temperature difference value is larger than the first preset temperature difference, determining the maximum candidate cable joint temperature value as a target cable joint temperature value of a target cross section by the temperature detection system of the power cable, and the target cable joint temperature value is 55 ℃.
In one possible implementation, (1) the temperature detection system of the power cable performs region division based on the position information of the target cable segment to obtain a plurality of cable segment sub-regions, and each cable segment sub-region comprises a plurality of sub-region position points; (2) The method comprises the steps that a temperature detection system of the power cable obtains a first cable segment temperature value of a first subregion position point and a second cable segment temperature value of a second subregion position point in a target cable segment subregion, wherein the first cable segment temperature value is the highest temperature value of the target cable segment subregion, and the second cable segment temperature value is the lowest temperature value of the target cable segment subregion; (3) The temperature detection system of the power cable generates a corresponding first cable section temperature difference value based on the first cable section temperature value and the second cable section temperature value; (4) And if the temperature difference value of the first cable section is greater than or equal to the second preset temperature difference value, generating third early warning information by the temperature detection system of the power cable, wherein the third early warning information comprises position information of a sub-area of the target cable section, and the third early warning information is used for indicating that the sub-area of the target cable section has a combustion risk.
The second preset temperature difference can be 6 degrees centigrade or 7 degrees centigrade, and the specific second preset temperature difference can be set according to the actual application scene.
For example, the temperature detection system of the power cable performs region division based on the position information of the target cable segment to obtain a plurality of cable segment sub-regions, each cable segment sub-region comprises a plurality of sub-region position points, the position information of the target cable segment comprises the start position information and the end position information of the target cable segment, namely, the temperature detection system of the power cable performs area division between the starting end and the tail end of a target cable segment, the length of each cable segment subregion can be the same or different, the specific division mode can be set according to practical application scenes, the temperature detection system of the power cable acquires a first cable segment temperature value of a first subregion position point and a second cable segment temperature value of a second subregion position point in the target cable segment subregion, the first cable segment temperature value is the highest temperature value of the target cable segment subregion, the second cable segment temperature value is the lowest temperature value of the target cable segment subregion, the first cable segment temperature value is 60 degrees centigrade, the second cable segment temperature value is 50 degrees centigrade, the temperature detection system of the power cable generates a corresponding first cable segment temperature difference value based on the first cable segment temperature value and the second cable segment temperature value, the first cable segment temperature difference value is 10 degrees centigrade, if the second preset temperature difference value is 5 degrees centigrade, and if the temperature difference value of the first cable section is larger than the second preset temperature difference value, generating third early warning information by a temperature detection system of the power cable, wherein the third early warning information comprises position information of a target cable section subregion, the position information of the target cable section subregion comprises the length from the temperature measurement host to the initial end of the target cable section subregion and the length from the temperature measurement host to the tail end of the target cable section subregion of the temperature sensing optical cable, and the third early warning information is used for indicating that the target cable section subregion has a combustion risk.
In a feasible implementation mode, (1) the temperature detection system of the power cable acquires an environmental temperature value of a position point of a target cable section through a temperature sensing optical cable allowance ring; (2) If the target cable segment position point meets a preset condition, a temperature detection system of the power cable generates fourth early warning information, the preset condition is used for indicating that the target cable segment temperature value is larger than or equal to a preset temperature value, the target cable segment temperature value is larger than an environment temperature value, the fourth early warning information comprises position information of the target cable segment position point, and the fourth early warning information is used for indicating that the target cable segment position point has a combustion risk.
It is to be appreciated that when the target cable segment temperature value is greater than the ambient temperature value, it may be determined that the target cable segment temperature rise is not due to environmental factors.
The preset temperature value can be 50 degrees centigrade or 55 degrees centigrade, and the specific preset temperature value can be set according to the actual application scene.
The temperature sensing optical cable allowance ring is arranged at the cable section at intervals of a preset distance and is used for detecting the environment temperature of the environment where the target power cable is located, wherein the preset distance can be 500 meters or 600 meters, the specific preset distance can be set according to the actual application scene, the preset length can be 10 meters or 15 meters, the specific preset length can be set according to the actual application scene, the temperature sensing optical cable allowance ring is formed by binding the temperature sensing optical cable allowance sections into a ring shape through a plurality of nylon bands and needs to be firmly fixed, the temperature sensing optical cable at the position of the in-and-out ring is guaranteed to have a larger bending radius, the bending radius can be 5 centimeters or 6 centimeters, and the specific bending radius can be set according to the actual application scene.
It should be noted that when the temperature-sensing optical cable passes through different areas, for example, enters a cable tunnel from a cable layer, a temperature-sensing optical cable allowance ring with a preset length needs to be arranged at a junction of the different areas. The temperature sensing optical cable jumps from one power cable to another power cable, and a temperature sensing optical cable allowance ring with a preset length needs to be arranged at the jumping position. The head end of the temperature sensing optical cable needs to be provided with a temperature sensing optical cable allowance ring with a preset length to realize head end positioning, and the tail end of the temperature sensing optical cable also needs to be provided with a temperature sensing optical cable allowance ring with a preset length to realize tail end positioning.
For example, the temperature detection system of the power cable obtains an ambient temperature value of 35 degrees celsius of a target cable segment position point through the temperature sensing optical cable allowance ring, if the target cable segment temperature value is 55 degrees celsius, the preset temperature value is 50 degrees celsius, the target cable segment temperature value is greater than the preset temperature value, and the target cable segment temperature value is greater than the ambient temperature value, the temperature detection system of the power cable generates fourth early warning information, the fourth early warning information includes position information of the target cable segment position point, the position information of the target cable segment position point is the length of the temperature sensing optical cable from the temperature measurement host to the target cable segment position point, if 200 meters, the fourth early warning information is used for indicating that the target cable segment position point has a combustion risk.
In the embodiment of the invention, whether the combustion risk exists in the target cable section position point and the target cable joint is judged by acquiring the target cable section temperature value of the target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to the target cross section in the target cable joint, so that the detection of the power cable temperature is realized, different paving modes are adopted for the target cable section and the target cable joint, and the accuracy of temperature data is improved.
With reference to fig. 5, the method for detecting the temperature of the power cable in the embodiment of the present invention is described above, and the apparatus for detecting the temperature of the power cable in the embodiment of the present invention is described below, where an embodiment of the apparatus for detecting the temperature of the power cable in the embodiment of the present invention includes:
the first obtaining module 501 is configured to obtain a target temperature data set of a target power cable through a temperature sensing optical cable, where the target power cable includes a target cable segment and a target cable joint, the target temperature data set includes a target cable segment temperature value of a target cable segment position point on the target cable segment and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cables are laid in parallel on a side surface of the target cable segment, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying manner;
the first calculation module 502 is configured to calculate a plurality of candidate cable joint temperature values to obtain a target cable joint temperature value of a target cross section;
a first generating module 503, configured to generate first warning information if the temperature value of the target cable joint is greater than or equal to a first threshold, where the first warning information includes position information of the target cable joint and is used to indicate that the target cable joint has a combustion risk;
a second calculating module 504, configured to calculate a target cable segment temperature increase rate corresponding to a target cable segment location point in the target cable segment based on the target cable segment temperature value;
and a second generating module 505, configured to generate second early warning information if the temperature increase rate of the target cable segment is greater than or equal to a second threshold, where the second early warning information includes location information of a location point of the target cable segment, and the second early warning information is used to indicate that a combustion risk exists at the location point of the target cable segment.
In the embodiment of the invention, whether the position point of the target cable section and the target cable joint have combustion risks or not is judged by acquiring the target cable section temperature value of the position point of the target cable section on the target cable section and the plurality of candidate cable joint temperature values corresponding to the target cross section in the target cable joint, so that the detection of the temperature of the power cable is realized, different paving modes are adopted for the target cable section and the target cable joint, and the accuracy of temperature data is improved.
Referring to fig. 6, another embodiment of the temperature detection apparatus for a power cable according to an embodiment of the present invention includes:
the first acquisition module 501 is configured to acquire a target temperature data set of a target power cable through a temperature sensing optical cable, where the target power cable includes a target cable segment and a target cable joint, the target temperature data set includes a target cable segment temperature value of a target cable segment position point on the target cable segment and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cables are laid on the side surface of the target cable segment in parallel, and the temperature sensing optical cables are laid on the side surface of the target cable joint in a double-loop turn-back laying manner;
the first calculation module 502 is configured to calculate a plurality of candidate cable joint temperature values to obtain a target cable joint temperature value of a target cross section;
a first generating module 503, configured to generate first early warning information if the temperature value of the target cable joint is greater than or equal to a first threshold, where the first early warning information includes position information of the target cable joint, and the first early warning information is used to indicate that the target cable joint has a combustion risk;
a second calculating module 504, configured to calculate a target cable segment temperature increase rate corresponding to a target cable segment location point in the target cable segment based on the target cable segment temperature value;
and a second generating module 505, configured to generate second early warning information if the temperature increase rate of the target cable segment is greater than or equal to a second threshold, where the second early warning information includes location information of a location point of the target cable segment, and the second early warning information is used to indicate that a combustion risk exists at the location point of the target cable segment.
Optionally, the first calculating module 502 is specifically configured to:
sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence;
eliminating the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence to obtain a target temperature value sequence;
based on the sequence of target temperature values, an average temperature value for the target cross-section is generated and determined as a target cable joint temperature value for the target cross-section.
Optionally, the first calculating module 502 is specifically configured to:
sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence;
calculating a cable joint temperature difference value between the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence;
and if the cable joint temperature difference value is greater than or equal to the first preset temperature difference, determining the maximum candidate cable joint temperature value as a target cable joint temperature value of the target cross section.
Optionally, the temperature detecting device of the power cable further includes:
a region dividing module 506, configured to perform region division based on the position information of the target cable segment to obtain a plurality of cable segment sub-regions, where each cable segment sub-region includes a plurality of sub-region position points;
the second obtaining module 507 is configured to obtain a first cable segment temperature value of a first sub-region position point in a target cable segment sub-region and a second cable segment temperature value of a second sub-region position point, where the first cable segment temperature value is a highest temperature value of the target cable segment sub-region, and the second cable segment temperature value is a lowest temperature value of the target cable segment sub-region;
a third generating module 508, configured to generate a corresponding first cable segment temperature difference value based on the first cable segment temperature value and the second cable segment temperature value;
a fourth generating module 509, configured to generate third early warning information if the temperature difference of the first cable segment is greater than or equal to the second preset temperature difference, where the third early warning information includes position information of the target cable segment sub-region, and the third early warning information is used to indicate that a combustion risk exists in the target cable segment sub-region.
Optionally, the second calculating module 504 is specifically configured to:
recording a first moment corresponding to a target cable segment temperature value;
acquiring a cable segment temperature value of a target cable segment position point at a second moment, wherein the second moment is greater than the first moment;
generating a second cable segment temperature difference value of the target cable segment position point based on the cable segment temperature value at the second moment and the target cable segment temperature value;
generating a time difference value of the position point of the target cable segment based on the second moment and the first moment;
and generating a target cable segment temperature increase rate of the target cable segment position point based on the second cable segment temperature difference value and the time difference value.
Optionally, the cable section is provided with a temperature sensing optical cable allowance ring with a preset length at intervals of a preset distance;
the temperature sensing optical cable allowance ring is used for detecting the environment temperature of the environment where the target power cable is located.
Optionally, the temperature detecting device of the power cable further includes:
a third obtaining module 510, configured to obtain an ambient temperature value of a location point of a target cable segment through the temperature-sensitive optical cable residual ring;
the fifth generating module 511 is configured to generate fourth early warning information if the target cable segment location point meets a preset condition, where the preset condition is used to indicate that the target cable segment temperature value is greater than or equal to a preset temperature value, and the target cable segment temperature value is greater than an environmental temperature value, the fourth early warning information includes location information of the target cable segment location point, and the fourth early warning information is used to indicate that the target cable segment location point has a combustion risk.
In the embodiment of the invention, whether the position point of the target cable section and the target cable joint have combustion risks or not is judged by acquiring the target cable section temperature value of the position point of the target cable section on the target cable section and the plurality of candidate cable joint temperature values corresponding to the target cross section in the target cable joint, so that the detection of the temperature of the power cable is realized, different paving modes are adopted for the target cable section and the target cable joint, and the accuracy of temperature data is improved.
Fig. 5 and 6 describe the temperature detection device of the power cable in the embodiment of the present invention in detail from the perspective of the modular functional entity, and the temperature detection system of the power cable in the embodiment of the present invention is described in detail from the perspective of hardware processing.
Fig. 7 is a schematic structural diagram of a temperature detection system of a power cable according to an embodiment of the present invention, where the temperature detection system 700 of the power cable includes a temperature-sensing optical cable 710, a temperature measurement host 720, and a monitoring management platform 730.
The present invention also provides a computer readable storage medium, which may be a non-volatile computer readable storage medium, which may also be a volatile computer readable storage medium, having stored therein instructions, which, when run on a temperature detection system of a power cable, cause the temperature detection system of the power cable to perform the steps of the method for detecting the temperature of the power cable.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A temperature detection method of a power cable is characterized by being applied to a temperature detection system of the power cable, wherein the temperature detection system of the power cable at least comprises a temperature sensing optical cable, and the temperature detection method of the power cable comprises the following steps:
acquiring a target temperature data set of a target power cable through the temperature sensing optical cable, wherein the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is laid on the side surface of the target cable section in parallel, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode;
calculating the candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section;
if the temperature value of the target cable joint is larger than or equal to a first threshold value, generating first early warning information, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk;
calculating a target cable segment temperature increase rate corresponding to the target cable segment position point in the target cable segment based on the target cable segment temperature value;
and if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, generating second early warning information, wherein the second early warning information comprises position information of the position point of the target cable segment, and the second early warning information is used for indicating that the position point of the target cable segment has a combustion risk.
2. The method for detecting the temperature of the power cable according to claim 1, wherein the calculating the plurality of candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section includes:
sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence;
eliminating the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence to obtain a target temperature value sequence;
generating an average temperature value of the target cross section based on the target temperature value sequence, and determining the average temperature value as a target cable joint temperature value of the target cross section.
3. The method for detecting the temperature of the power cable according to claim 1, wherein the calculating the candidate cable joint temperature values to obtain the target cable joint temperature value of the target cross section includes:
sequencing the candidate cable joint temperature values according to the sequence of the temperature values from large to small to obtain an initial temperature value sequence;
calculating a cable joint temperature difference value between the maximum candidate cable joint temperature value and the minimum candidate cable joint temperature value in the initial temperature value sequence;
and if the cable joint temperature difference value is greater than or equal to a first preset temperature difference value, determining the maximum candidate cable joint temperature value as a target cable joint temperature value of the target cross section.
4. The method for detecting the temperature of a power cable according to any one of claims 1 to 3, further comprising, after the acquiring a target temperature data set of a target power cable by the temperature-sensitive optical cable, the steps of:
performing region division based on the position information of the target cable segment to obtain a plurality of cable segment sub-regions, wherein the cable segment sub-regions comprise a plurality of sub-region position points;
acquiring a first cable segment temperature value of a first sub-region position point in a target cable segment sub-region and a second cable segment temperature value of a second sub-region position point, wherein the first cable segment temperature value is the highest temperature value of the target cable segment sub-region, and the second cable segment temperature value is the lowest temperature value of the target cable segment sub-region;
generating a corresponding first cable segment temperature difference value based on the first cable segment temperature value and the second cable segment temperature value;
and if the temperature difference value of the first cable segment is greater than or equal to a second preset temperature difference value, generating third early warning information, wherein the third early warning information comprises position information of the target cable segment sub-region, and the third early warning information is used for indicating that the target cable segment sub-region has a combustion risk.
5. The method for detecting the temperature of the power cable according to claim 1, wherein the calculating a target cable segment temperature increase rate corresponding to the target cable segment location point in the target cable segment based on the target cable segment temperature value comprises:
recording a first moment corresponding to the target cable segment temperature value;
acquiring a cable segment temperature value of the target cable segment position point at a second moment, wherein the second moment is greater than the first moment;
generating a second cable segment temperature difference value of the target cable segment position point based on the cable segment temperature value at the second moment and the target cable segment temperature value;
generating a time difference value of the target cable segment location point based on the second time and the first time;
and generating a target cable segment temperature increase rate of the target cable segment location point based on the second cable segment temperature difference value and the time difference value.
6. The method of claim 1, wherein the step of detecting the temperature of the power cable includes the step of detecting the temperature of the power cable,
the cable section is provided with a temperature sensing optical cable allowance ring with a preset length at intervals of a preset distance;
the temperature sensing optical cable allowance ring is used for detecting the environment temperature of the environment where the target power cable is located.
7. The method for detecting the temperature of a power cable according to claim 6, further comprising, after acquiring a target temperature data set of a target power cable through the temperature-sensitive optical cable:
acquiring an environmental temperature value of a position point of the target cable section through a temperature sensing optical cable allowance ring;
if the target cable segment position point meets a preset condition, generating fourth early warning information, wherein the preset condition is used for indicating that the target cable segment temperature value is larger than or equal to a preset temperature value, the target cable segment temperature value is larger than the environment temperature value, the fourth early warning information comprises the position information of the target cable segment position point, and the fourth early warning information is used for indicating that the target cable segment position point has a combustion risk.
8. A temperature detection device of a power cable, characterized by comprising:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring a target temperature data set of a target power cable through a temperature sensing optical cable, the target power cable comprises a target cable section and a target cable joint, the target temperature data set comprises a target cable section temperature value of a target cable section position point on the target cable section and a plurality of candidate cable joint temperature values corresponding to a target cross section in the target cable joint, the temperature sensing optical cable is laid on the side surface of the target cable section in parallel, and the temperature sensing optical cable is laid on the side surface of the target cable joint in a double-ring turn-back laying mode;
the first calculation module is used for calculating the candidate cable joint temperature values to obtain a target cable joint temperature value of the target cross section;
the first generation module is used for generating first early warning information if the temperature value of the target cable joint is greater than or equal to a first threshold value, wherein the first early warning information comprises position information of the target cable joint and is used for indicating that the target cable joint has a combustion risk;
the second calculation module is used for calculating the temperature increase rate of the target cable segment corresponding to the target cable segment position point in the target cable segment based on the target cable segment temperature value;
and the second generation module is used for generating second early warning information if the temperature increase rate of the target cable segment is greater than or equal to a second threshold value, wherein the second early warning information comprises the position information of the position point of the target cable segment, and the second early warning information is used for indicating that the position point of the target cable segment has a combustion risk.
9. The utility model provides a temperature measuring system of power cable, its characterized in that, power cable's temperature measuring system includes temperature sensing optical cable, temperature measurement host computer and control management platform, the temperature measurement host computer includes: the monitoring management platform is used for displaying a temperature data set acquired by the temperature sensing optical cable;
the at least one processor invokes the instructions in the memory to cause the power cable temperature detection system to perform the power cable temperature detection method of any of claims 1-7.
10. A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of temperature detection of a power cable according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211308947.XA CN115371837A (en) | 2022-10-25 | 2022-10-25 | Temperature detection method, device and system for power cable and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211308947.XA CN115371837A (en) | 2022-10-25 | 2022-10-25 | Temperature detection method, device and system for power cable and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115371837A true CN115371837A (en) | 2022-11-22 |
Family
ID=84073455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211308947.XA Pending CN115371837A (en) | 2022-10-25 | 2022-10-25 | Temperature detection method, device and system for power cable and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115371837A (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535221A (en) * | 2014-12-25 | 2015-04-22 | 山东康威通信技术股份有限公司 | Intelligent analysis method based on distributive optical fiber temperature measurement |
| CN106595900A (en) * | 2016-11-16 | 2017-04-26 | 国网山东省电力公司东营供电公司 | Extra-high-voltage cable fault monitoring system |
| CN107179143A (en) * | 2017-06-29 | 2017-09-19 | 江苏省电力试验研究院有限公司 | A kind of isolation switch contact temperature monitoring model of GIS shells and environment thermometric |
| CN107702818A (en) * | 2017-08-23 | 2018-02-16 | 国网福建省电力有限公司 | Submarine cable temperature monitoring system |
| CN107990836A (en) * | 2017-11-21 | 2018-05-04 | 武汉理工大学 | A kind of pipelines and petrochemical pipelines strain and temperature online monitoring system and method |
| CN207408018U (en) * | 2017-09-15 | 2018-05-25 | 国网浙江嘉善县供电公司 | A kind of cable intermediate joint temperature easy to install based on temperature difference method rises on-Line Monitor Device |
| CN207423391U (en) * | 2017-09-15 | 2018-05-29 | 国网浙江嘉善县供电公司 | A kind of wind power energy-saving cable intermediate joint temperature based on temperature difference method rises on-Line Monitor Device |
| CN109341894A (en) * | 2018-11-27 | 2019-02-15 | 国网重庆市电力公司电力科学研究院 | A kind of GIS disconnecting switch shell grating fibers temperature sensor thermometric experimental provision |
| CN208953136U (en) * | 2018-09-21 | 2019-06-07 | 深圳供电局有限公司 | Cable temperature detection device |
| CN110926648A (en) * | 2019-11-15 | 2020-03-27 | 神华粤电珠海港煤炭码头有限责任公司 | High tension cable middle head optic fibre temperature measurement system |
| CN111769649A (en) * | 2020-07-31 | 2020-10-13 | 国网山东省电力公司寿光市供电公司 | Cable intermediate head monitoring system |
| CN112304463A (en) * | 2020-10-15 | 2021-02-02 | 国网福建省电力有限公司莆田供电公司 | Temperature difference method-based cable joint temperature rise fault monitoring method and monitoring device |
| CN113433167A (en) * | 2021-06-10 | 2021-09-24 | 国网湖南省电力有限公司 | Method and system for monitoring state of power cable terminal equipment based on infrared chart |
| CN113465754A (en) * | 2021-06-07 | 2021-10-01 | 芯海科技（深圳）股份有限公司 | Temperature monitoring system and temperature monitoring method thereof |
| CN113884215A (en) * | 2021-09-29 | 2022-01-04 | 国网新疆电力有限公司阿勒泰供电公司 | Cable fire monitoring system based on grating array sensing optical cable |
| CN114184286A (en) * | 2021-12-20 | 2022-03-15 | 中国电力科学研究院有限公司 | Low-power-consumption wireless temperature measurement system and device for power cable and early warning method |
| CN114485954A (en) * | 2021-12-16 | 2022-05-13 | 国网山东省电力公司济宁供电公司 | Cable accessory temperature data abnormity judgment method and system |
| CN114493070A (en) * | 2020-10-26 | 2022-05-13 | 奥动新能源汽车科技有限公司 | Thermal runaway early warning method and system for charging cable of battery replacement station |
| CN114783165A (en) * | 2022-06-22 | 2022-07-22 | 山东科华电力技术有限公司 | Cable channel external damage prevention online monitoring system based on distributed optical fiber vibration sensing |
-
2022
- 2022-10-25 CN CN202211308947.XA patent/CN115371837A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535221A (en) * | 2014-12-25 | 2015-04-22 | 山东康威通信技术股份有限公司 | Intelligent analysis method based on distributive optical fiber temperature measurement |
| CN106595900A (en) * | 2016-11-16 | 2017-04-26 | 国网山东省电力公司东营供电公司 | Extra-high-voltage cable fault monitoring system |
| CN107179143A (en) * | 2017-06-29 | 2017-09-19 | 江苏省电力试验研究院有限公司 | A kind of isolation switch contact temperature monitoring model of GIS shells and environment thermometric |
| CN107702818A (en) * | 2017-08-23 | 2018-02-16 | 国网福建省电力有限公司 | Submarine cable temperature monitoring system |
| CN207408018U (en) * | 2017-09-15 | 2018-05-25 | 国网浙江嘉善县供电公司 | A kind of cable intermediate joint temperature easy to install based on temperature difference method rises on-Line Monitor Device |
| CN207423391U (en) * | 2017-09-15 | 2018-05-29 | 国网浙江嘉善县供电公司 | A kind of wind power energy-saving cable intermediate joint temperature based on temperature difference method rises on-Line Monitor Device |
| CN107990836A (en) * | 2017-11-21 | 2018-05-04 | 武汉理工大学 | A kind of pipelines and petrochemical pipelines strain and temperature online monitoring system and method |
| CN208953136U (en) * | 2018-09-21 | 2019-06-07 | 深圳供电局有限公司 | Cable temperature detection device |
| CN109341894A (en) * | 2018-11-27 | 2019-02-15 | 国网重庆市电力公司电力科学研究院 | A kind of GIS disconnecting switch shell grating fibers temperature sensor thermometric experimental provision |
| CN110926648A (en) * | 2019-11-15 | 2020-03-27 | 神华粤电珠海港煤炭码头有限责任公司 | High tension cable middle head optic fibre temperature measurement system |
| CN111769649A (en) * | 2020-07-31 | 2020-10-13 | 国网山东省电力公司寿光市供电公司 | Cable intermediate head monitoring system |
| CN112304463A (en) * | 2020-10-15 | 2021-02-02 | 国网福建省电力有限公司莆田供电公司 | Temperature difference method-based cable joint temperature rise fault monitoring method and monitoring device |
| CN114493070A (en) * | 2020-10-26 | 2022-05-13 | 奥动新能源汽车科技有限公司 | Thermal runaway early warning method and system for charging cable of battery replacement station |
| CN113465754A (en) * | 2021-06-07 | 2021-10-01 | 芯海科技（深圳）股份有限公司 | Temperature monitoring system and temperature monitoring method thereof |
| CN113433167A (en) * | 2021-06-10 | 2021-09-24 | 国网湖南省电力有限公司 | Method and system for monitoring state of power cable terminal equipment based on infrared chart |
| CN113884215A (en) * | 2021-09-29 | 2022-01-04 | 国网新疆电力有限公司阿勒泰供电公司 | Cable fire monitoring system based on grating array sensing optical cable |
| CN114485954A (en) * | 2021-12-16 | 2022-05-13 | 国网山东省电力公司济宁供电公司 | Cable accessory temperature data abnormity judgment method and system |
| CN114184286A (en) * | 2021-12-20 | 2022-03-15 | 中国电力科学研究院有限公司 | Low-power-consumption wireless temperature measurement system and device for power cable and early warning method |
| CN114783165A (en) * | 2022-06-22 | 2022-07-22 | 山东科华电力技术有限公司 | Cable channel external damage prevention online monitoring system based on distributed optical fiber vibration sensing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6816969B2 (en) | Methods and equipment for monitoring submarine cables | |
| WO2014205996A1 (en) | Method for predicting the life of transformer based on fibre grating temperature measurement system | |
| CN103616091B (en) | A kind of distributed fiber optic temperature and stress sensing device | |
| KR100567887B1 (en) | Apparatus and Method for Analysis of Electric Power Transmission Link Status Having Function of Real-Time Evaluating Thermal Parameters Outside the Link | |
| RU2593521C1 (en) | Method of testing systems comprising electroexplosive devices for resistance to action of external electromagnetic fields in objects and device therefor | |
| US20080110389A1 (en) | Distributed temperature sensing in a remotely operated vehicle umbilical fiber optic cable | |
| CN104362928A (en) | Method, device and system for obtaining temperature of motor | |
| CN110333673A (en) | A kind of cable shaft method of environmental monitoring, system and equipment based on Internet of Things | |
| CN104344913A (en) | Temperature measurement system and method based on fiber grating sensing | |
| CN105841845B (en) | A method of temperature calibration is carried out at line leakage scene | |
| CN107422215A (en) | A kind of current-carrying capacity of cable monitoring method and system based on distributed optical fiber temperature measurement technology | |
| CN202141770U (en) | Cable current-carrying capacity calculating and early warning system based on distributed fiber temperature measurement | |
| CN201707750U (en) | Gaseous spectrum absorption box and temperature control grating and combined fiber grating fire hazard warning system | |
| EP3172545B1 (en) | Temperature sensor | |
| CN104989959B (en) | A kind of intelligent electric-heating oil-collecting gas gathering system | |
| CN115371837A (en) | Temperature detection method, device and system for power cable and storage medium | |
| CN202511922U (en) | Oppc optical cable stress and carrying capacity measuring and calculating system | |
| CN209764294U (en) | Long-distance cable continuous temperature monitoring system with automatic division of monitoring area | |
| CN106646670B (en) | A kind of transmission line of electricity distribution microclimate monitoring method | |
| CN103698047A (en) | High-voltage electrical equipment non-contact fluorescence temperature measurement system | |
| JP2016183881A (en) | Optical fiber sensor device | |
| CN205263987U (en) | Boats and ships cabin monitoring fire alarm device | |
| CN203929275U (en) | A kind of temperature-measuring system of distributed fibers | |
| CN108020345A (en) | A kind of distributed fiber temperature measuring device based on single mode optical fiber Raman scattering effect | |
| Dubaniewicz et al. | Distributed measurement of conductor temperatures in mine trailing cables using fiber-optic technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |