CN202511897U - Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables - Google Patents
Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables Download PDFInfo
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- CN202511897U CN202511897U CN2012201909198U CN201220190919U CN202511897U CN 202511897 U CN202511897 U CN 202511897U CN 2012201909198 U CN2012201909198 U CN 2012201909198U CN 201220190919 U CN201220190919 U CN 201220190919U CN 202511897 U CN202511897 U CN 202511897U
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Abstract
The utility model provides an intelligent monitoring system for the temperature of crosslinked polyethylene (XLPE) power cables, relating to the technical field of power cable monitoring. The intelligent monitoring system for the temperature of the crosslinked polyethylene power cables comprises a temperature sensor, a temperature real-time collector substation, a dual-ring optic fiber self-healing ring-like network and a working station computer, wherein the working station computer is connected with the temperature real-time collector substation through the dual-ring optic fiber self-healing ring-like network; the temperature real-time collector substation is connected with the temperature sensor through an interface circuit; the interface circuit refers to the connection between the temperature real-time collector substation and the temperature sensor through a photoelectric coupler; the temperature real-time collector substation mainly comprises a center processing unit (CPU), a memory, a display, a power supply source, a clock unit and a self-output control circuit; and an I/O (Input/Output) port is respectively connected with the interface circuit and an optical transceiver in the dual-ring optic fiber self-healing ring-like network. The intelligent monitoring system for the temperature of the XLPE power cables the advantages of simple structure, high reliability, strong expandability, easiness in installation and maintenance and the like; additionally, the insulation defects of the power cables are discovered in time, so that the accidents are prevented from occurring; and therefore, the safe operation of the cables is ensured.
Description
Technical field
The utility model relates to the power cable monitoring technical field, especially a kind of crosslinked polyethylene XLPE power cable temperature intelligent monitoring system.
Background technology
Cross-inked polyethylene power cable since have do not have oil, auxiliary device is few, install and lay and advantages such as operation maintenance is simple, has obtained application more and more widely.As a kind of easy cable insulation method for monitoring operation states, cable temperature monitoring helps in time finding the insulation defect of cross-inked polyethylene power cable, prevents the generation of accident, guarantees the safe operation of cable.
In the practice of XLPE power cable fault, its connector is the position that insulation fault often takes place.Data at home and abroad statistics shows, cable end fault shared ratio in the cable body fault is quite high, and this also is the starting point that the inventor studies XLPE power cable connector Insulation Live Testing technology.
The cable connector fault generally shows as connector blast, and before and after fault with tangible superheating phenomenon, this connector temperature that occurs with thermal phenomenon also will have greatly changed.Therefore, whether good temperature be to weigh XLPE state of insulation important indicator.
The technology of present XLPE power cable connector Insulation Live Testing and method can only be from a certain characteristic face reflection state of insulations; Because the not comprehensive and locality of reflection quantity of information; Make the testing result deviation bigger; Detect validity and do not reach the scope of requirement, and cause XLPE power cable connector in service insulation ag(e)ing, deterioration.But many reasons are arranged, like running overload, earth fault; Make cable water set growth, (annotate: the water tree is meant existence or the intrusion because of water in insulation course of twisted polyethylene cable and connector thereof, because effect of electric field; Make the phenomenon that forms the moisture defective of dendroid in the insulator) the conductor flow super-high-current etc., these reasons are come out with the temperature indicated number that is changed to a certain extent on presentation, and temperature survey is simply easy in addition; Flexible; Therefore, the online test method that makes up with the insulation of temperature reflection XLPE power cable connector is feasible, and has important practical significance.
The utility model content
The purpose of the utility model provides a kind of crosslinked polyethylene XLPE power cable temperature online monitoring system, make it to have simple in structure, reliability is high, extensibility is strong, installation and maintenance are easy to characteristics to overcome the deficiency of above-mentioned technology.
Can realize the purpose that this is novel through following technical solution: a kind of crosslinked polyethylene XLPE power cable temperature intelligent monitoring system; Comprise temperature sensor, the real-time collector of temperature substation, dicyclo optical fiber self-healing looped network, workstation computer; Said workstation computer is connected with the real-time collector of temperature substation through the dicyclo optical fiber self-healing looped network, and the real-time collector of temperature substation is connected with temperature sensor through interface circuit; Said interface circuit is meant between the real-time collector of temperature substation and the temperature sensor and adopts being connected of photoelectrical coupler, to prevent the harm of high-tension current.
Further, the real-time collector of said temperature substation mainly comprises central processing unit CPU, storer, display, power supply, clock unit and from output control circuit; Fiber optic in its I/O mouth difference connecting interface circuit and the dicyclo optical fiber self-healing looped network; Nearly the signal of measuring point collects in the substation earlier and handles, and the data after will handling are sent to remote work station through data communication bus.
Further, external 40 temperature sensors in the real-time collector of each temperature substation form the measurement of a plurality of temperature monitoring points.
Preferably, the central processing unit CPU selected for use of the real-time collector of said temperature substation is 16 C8051F310 chips of SILICON company.
Preferably, said photoelectrical coupler adopts daily output PC817 photoelectrical coupler.
Under the support of software systems, the utility model helps monitoring in real time the ruuning situation of cross-inked polyethylene power cable insulation through the on-line monitoring of temperature, in time finds its insulation defect, prevents the generation of accident, guarantees the safe operation of cable.Can directly perceived, succinct data presentation and system control interface be provided for on-line monitoring operation and managerial personnel.The utility model is on the basis of domestic and international cable temperature monitoring method of analysis-by-synthesis and technical research present situation; With regard to the mathematical model that concerns between core temperature and surface temperature, problems such as design of the hardware and software of cable temperature on-line monitoring system and on-the-spot mount scheme have been carried out series of studies.Adopt Finite Element Method; Utilize COMSOL Multiphysics software to set up the mathematical model between XLPE cable core temperature and surface temperature; And be that the XLPE cable of VYJV22-6/l0kV 3 * 300 has carried out theory and experimental analysis with the model; Its calculated value is respectively 18.3 ℃ and 20.0 ℃ with the experiment detected value, has verified the validity and the accuracy of number sequence model, for on-line monitoring XLPE electric-cable core temperature provides theory and experimental basis.
Compare with prior art, this novel advantage and beneficial effect is following:
1, the on-line monitoring through temperature; Help monitoring in real time the ruuning situation of cross-inked polyethylene power cable insulation; In time find its insulation defect; Prevent the generation of accident, guarantee the safe operation of cable, can directly perceived, succinct data presentation and system control interface be provided for on-line monitoring operation and managerial personnel.
2, realize the on-line monitoring of XLPE cable temperature, and had advantages such as simple in structure, that reliability is high, the strong installation and maintenance of extensibility are easy.
3, adopt the design philosophy of distributed system, accomplished the hardware designs of XLPE cable temperature online monitoring system, reflect that structure is feasible with the online test method of temperature reflection XLPE power cable connector insulation.
Description of drawings
Fig. 1 is this novel said monitoring system structured flowchart synoptic diagram.
Fig. 2 is this novel said monitoring system interface circuit principal intention.
Fig. 3 is this novel said monitoring system substation theory diagram synoptic diagram.
Fig. 4 is this novel said monitoring system temperature sensor theory diagram synoptic diagram.
Fig. 5 is this novel said monitoring system optical fiber self-healing looped network theory diagram synoptic diagram.
Embodiment
Provide embodiment in conjunction with accompanying drawing this is novelly done further explanation.
Can know this novel temperature sensor 5, the real-time collector of temperature substation 3, workstation computer 1 of comprising referring to Fig. 1; Said workstation computer 1 is connected with the real-time collector of temperature substation 3 through dicyclo optical fiber self-healing looped network 2, and the real-time collector of temperature substation 3 is connected with temperature sensor 5 through interface circuit 4; Said interface circuit 4 is meant the CC that adopts photoelectrical coupler 6 between the real-time collector of temperature substation 3 and the temperature sensor 5, to prevent the harm of high-tension current.System adopts bus-organization, and cable temperature is carried out decentralized measure, concentrated and keep watch on, and when adding new monitoring of equipment module and sensor, revises the software arrangements parameter and gets final product.Temperature sensor 5 sends to the real-time collector of temperature substation 3 with the temperature data that collects, and the real-time collector of temperature substation 3 is sent to remote work station computing machine 1 through optical fiber self-healing looped network 2 with data and carries out analyzing and processing.
Can know that referring to Fig. 2, Fig. 3 the real-time collector of the temperature substation of power cable running temperature on-line monitoring system work on the spot comprises central processing unit CPU, storer, display, power supply, unit all the time, and from output control circuit.The chip of its substation is selected the high-performance sixteen bit single chip microcomputer C8051F310 of SILICON company for use, has advantages such as function is strong, low in energy consumption, reliable.Fiber optic 2-1 in its I/O mouth difference connecting interface circuit 4 and the dicyclo optical fiber self-healing looped network 2.The substation design is a very important part in the power cable running temperature on-line monitoring system, and whether the quality of its design is directly connected to the reliability and the accuracy of system.The substation is a relatively independent system, and is closely related with computing machine again.It possesses following function: 1. accomplish temperature data acquisition; 2. with the computing machine communication.Consider that a substation will connect a plurality of temperature sensors, the real-time collector of each temperature substation 3 external 40 temperature sensors form the measurement of a plurality of temperature monitoring points in the present embodiment, but the interpolation of temperature monitoring point flexible configuration has good extended capability.Because distance is far away, has increased interface circuit 4.Wherein connect temperature sensor 5 by photoelectrical coupler, photoelectricity is isolated part and is selected for use Japan to produce the PC817 photoelectrical coupler
,Thereby improved the antijamming capability and the operational reliability of substation, prevented the harm of high-tension current simultaneously.
Referring to Fig. 4 temperature sensor section: the temperature sensor that native system embodiment adopts is a U.S. DALLAS Company products DS1820 digital temperature sensor; Measurement range is 55～125 ℃; Measuring accuracy is ± 0.5 ℃, can accurately measure the temperature of cable splice place temperature or other infield.This digital temperature sensor adopts the half-duplex data communication interface, and the substation is to its input cognizance code and command word, and it exports digital temperature value to the substation.
The main function components of DS1820 comprises: temperature sensing circuit, A/D change-over circuit, read only memory ROM, random access memory ram, electric erasable EPROM, serial communication port etc.
Referring to Fig. 5, this novel employing optical-fibre communications also adopts the self-healing looped network form to improve its reliability of information transmission.The fiber optic 2-1 that selects for use is for stepping prestige RS-232/RS-485 dicyclo self-healing fiber optic, and its transmission bandwidth is two-way 100M, and each node all externally provides three 100/10M self-adaptation Ethernet interfaces; Utilize the serial communication networking technology; Each node also all externally provides four RS-232 interfaces and RS485 interface; Can realize transparent transmission between any serial ports of different nodes, and support multiple transfer rate such as 300/600/1200/2400/4800/9600/19200bps.Remote work station computing machine part mainly is that the temperature at cable end place is carried out verification; The data pre-service; The corresponding sign that out-of-limit inspection etc. obtain, the form with the interface shows then, forms monitoring window, history curve window, measuring point distribution window in real time at last.The utility model power cable temperature intelligent monitoring system adopts advanced CAN bussing technique; Judge the working condition of cable through the temperature variation of detection streamer head and cable body; Predict and avoid contingent accident through overtemperature alarm, carry out the monitoring (environment temperature, smog, water level) and the control (illumination, exhaust blower, fire-proof door) of cable surrounding environment simultaneously.Be main means promptly, be aided with the remedial measures after environment temperature, Smoke Detection take place as accident, reduce loss through control exhaust blower, fire-proof door again, thereby guarantee cable running safety with temperature detection advance notice accident.
Claims (5)
1. crosslinked polyethylene XLPE power cable temperature intelligent monitoring system; Comprise temperature sensor, the real-time collector of temperature substation, dicyclo optical fiber self-healing looped network, workstation computer; It is characterized in that; Said workstation computer (1) is connected with the real-time collector of temperature substation (3) through dicyclo optical fiber self-healing looped network (2), and the real-time collector of temperature substation (3) is connected with temperature sensor 5 through interface circuit (4); Said interface circuit (4) is meant between the real-time collector of temperature substation (3) and the temperature sensor (5) and adopts being connected of photoelectrical coupler (6), to prevent the harm of high-tension current.
2. a kind of crosslinked polyethylene XLPE power cable temperature intelligent monitoring system according to claim 1 is characterized in that the real-time collector of said temperature substation (3) mainly comprises central processing unit CPU; Storer; Display, power supply, clock unit and from output control circuit; Fiber optic (2-1) in its I/O mouth difference connecting interface circuit (4) and the dicyclo optical fiber self-healing looped network (2); Nearly the signal of measuring point collects in the substation earlier and handles, and the data after will handling are sent to remote work station through data communication bus.
3. a kind of crosslinked polyethylene XLPE power cable temperature intelligent monitoring system according to claim 1 is characterized in that external 40 temperature sensors in the real-time collector of each temperature substation (3) form the measurement of a plurality of temperature monitoring points.
4. a kind of crosslinked polyethylene XLPE power cable temperature intelligent monitoring system according to claim 2 is characterized in that the central processing unit CPU that the real-time collector of said temperature substation (3) is selected for use is 16 C8051F310 chips of SILICON company.
5. a kind of crosslinked polyethylene XLPE power cable temperature intelligent monitoring system according to claim 1 is characterized in that, said photoelectrical coupler (6) adopts daily output PC817 photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201909198U CN202511897U (en) | 2012-04-28 | 2012-04-28 | Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201909198U CN202511897U (en) | 2012-04-28 | 2012-04-28 | Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables |
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| Publication Number | Publication Date |
|---|---|
| CN202511897U true CN202511897U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201909198U Expired - Lifetime CN202511897U (en) | 2012-04-28 | 2012-04-28 | Intelligent monitoring system for temperature of crosslinked polyethylene (XLPE) power cables |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636274A (en) * | 2012-04-28 | 2012-08-15 | 四川省电力公司自贡电业局 | Intelligent temperature monitoring system of crosslinked polyethylene XLPE power cable |
| CN113310595A (en) * | 2021-05-10 | 2021-08-27 | 湖北工业大学 | Device and method for detecting insulating property of XLPE cable |
-
2012
- 2012-04-28 CN CN2012201909198U patent/CN202511897U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636274A (en) * | 2012-04-28 | 2012-08-15 | 四川省电力公司自贡电业局 | Intelligent temperature monitoring system of crosslinked polyethylene XLPE power cable |
| CN113310595A (en) * | 2021-05-10 | 2021-08-27 | 湖北工业大学 | Device and method for detecting insulating property of XLPE cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20131227 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131227 Address after: 643000 Zigong city of Sichuan Province, Ziliujing District tanmulin Street No. 115 Patentee after: Zigong Electric Bureau, Sichuan Electric Power Co., Ltd. Patentee after: State Grid Corporation of China Address before: 643000 Zigong city of Sichuan Province, Ziliujing District tanmulin Street No. 115 Patentee before: Zigong Electric Bureau, Sichuan Electric Power Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |