CN104568016A - Cable joint health diagnosis and heat fault pre-warning system - Google Patents
Cable joint health diagnosis and heat fault pre-warning system Download PDFInfo
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- CN104568016A CN104568016A CN201510049419.0A CN201510049419A CN104568016A CN 104568016 A CN104568016 A CN 104568016A CN 201510049419 A CN201510049419 A CN 201510049419A CN 104568016 A CN104568016 A CN 104568016A
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Abstract
The invention provides a cable joint health diagnosis and heat fault pre-warning system. The system comprises a measurement control module, a communication module, a display module, an alarming module, a temperature sensor, a humidity sensor, a gas sensor, a stress sensor, a hoop metal strap, an environmental temperature sensor, an environmental humidity sensor and a control center network server. The different sensors are combined for online monitoring of cable joints, and by a manner different from an existing manner of alarming after occurrence of faults, unhealthy statuses and operation environments of the cable joints are measured and analyzed, such as temperature, humidity, gas, smoke, expansion, breathability, environmental temperature, environmental humidity and the like, and consequently low cost is guaranteed while sensitivity and accuracy of the pre-warning system are greatly improved. Therefore, health diagnosis and heat fault pre-warning of the cable joints are realized to effectively take preventive measures, reliability in operation of the cable joints and even an electric power system is improved, cable joint fault treatment time is shortened, and economic loss caused by faults of the cable joints is greatly reduced.
Description
Technical field
The present invention relates to a kind of cable joint protector, particularly relate to a kind of cable splice Gernral Check-up and hot fault warning system.
Background technology
Cable splice heating and even blast, be the operating a kind of most common failure of electrical production, not only can cause a large amount of energy losses, and the normal work of electrical equipment can be had a strong impact on, light then in circuit working current increase, the electrical equipment lost of life, heavy then can insulation breakdown be made, form short circuit, produce blast, can fire be caused, cause device damage, interrupt the production of well afoot, scientific research, medical operating and other activity, cause loss difficult to the appraisal.
The main cause of cable splice heating or blast comprises the following aspects.(1) mechanical damage: because urban construction administration is tight, construction to be not good at etc. causing, and accounts for 50% of cable fault; (2) sheath fatigue, be full of cracks, spalling: this is because cable mounting condition is bad, the reasons such as makers' workmanship is poor, the long-term overload of cable cause, this occurs on one section of cable near intermediate joint box terminals mostly, also has some to occur in the bad place of the intensive heat radiation of cable.(3) outdoor termination immersion blast: mostly occur on 10KV and following circuit, due to construction and operation maintenance improper, cause terminals condensate water knot gather in cable end, finally cause humidified insulation to puncture, set off an explosion.(4) cable intermediate joint blast: this is mostly that overload causes insulating gel in connector box to expand and spalling housing, or conductor bad connection makes joint overheated and explodes.(5) respiration: when cable load or ambient temperature change, the insulating gel in terminals expands with heat and contract with cold, and occurs " respiration ", formation inner air and outer air exchanges, thus moisture invade, condense in inwall and the gap of terminals, make insulation decline and breakdown.
As can be seen from the above-mentioned analysis of causes, cable splice, when going wrong, shows as temperature variation, humidity change, volume change, and temperature long-term too high time, the process damaged gradually of insulating also can produce the phenomenon such as cigarette, gas.Therefore, from on-line monitoring and the comprehensive analysis of this several respects factor, can make the health status of cable and judging accurately, and early warning is in advance made to faults such as contingent cable splice short circuit, blasts.
At present to the monitoring for protection mainly monitor temperature change of cable splice, individual other combines humidity detection, does not still carry out the Gernral Check-up of cable splice and the document of hot stall warning aspect.As Chinese patent " a kind of monitoring device for high voltage cable connector status in mine roadway " (application number: the device 200910074978.1) proposing a kind of continuous acquisition temperature, humidity, electric current, fundamental purpose reduces the labour intensity of patrolling and examining maintenance, the time etc. shortening breakdown judge and process; In addition, in fact electric current is inaccurate as the judgement parameter of cable splice state, because after cable splice contact resistance increases, when electric current is normal, also may there is situation that is overheated and even blast.
Predict the operation health status of cable splice in advance, timely early warning before fault, effectively can reduce device damage, ensure power supply reliability, reduce economic loss and casualties, have important practical significance.
Summary of the invention
The object of the invention is for hot stall problems such as current cable splice heating or blasts; there is provided that a kind of structure is simple, cost is lower, be active in one's movements and protect early warning system accurately; can the health status of online auto monitoring cable splice; reasonable arrangement repair and maintenance, and gave warning in advance before hot stall occurs or there is explosion potential.
The present invention in order to solve the problem adopt technical scheme be:
Cable splice Gernral Check-up and hot fault warning system comprise Survey control module (1), communication module (2), display module (3), alarm module (4), temperature sensor (5), humidity sensor (6).
Wherein the temperature of cable splice inside measured by temperature sensor (5), and data are given Survey control module (1), computational analysis temperature exceedes time span, the number of times of setting limit value, and account for the ratio of unit working time, after this ratio exceedes setting safety value, then judge cable splice place and unhealthy running status.The time span proportion that temperature exceedes setting limit value is larger, and the degree of aging of cable splice is higher; In unit interval temperature exceed setting limit value number of times more, the insulating coefficient of cable splice is lower, more dangerous.When running into this situation, operations staff's monitoring dynamics be reminded.The temperature of traditional cable splice inside, only carries out the judgement whether temperature exceedes setting limit value, therefore can only report to the police, and cannot give warning in advance.
Wherein the humidity of cable splice inside measured by humidity sensor (6), and data are given Survey control module (1), and whether computational analysis humidity exceedes the limit value of setting, when exceeding, then judges that cable splice is in unhealthy running status.When there being steam in cable splice, the deterioration of cable splice running environment can be made, needing to remind operations staff to carry out maintenance process, in order to avoid breakdown because of humidified insulation, and then blasting because of overheated.
Further, while Survey control module (1) judges that humidity exceedes the limit value of setting, if temperature exceedes the critical value of setting, namely when there is enough steam cable splice inside, if temperature is enough high, steam is vaporized, and causes volumetric expansion, the possibility of blasting is very large, then carry out the early warning of exploding.
State, early warning and warning message that cable splice runs by Survey control module (1) send display module (3) to show in real time, drive alarm module (4) to report to the police, by communication module (2) unloading or upload through network.Operations staff also scene hand-held set, USB flash disk etc. can read the data of a period of time; When cable splice is in abnormal running status, send early warning signal; When cable splice is in the running status of fault, send alerting signal, can on-the-spot sound and light alarm, also can through wired or wireless network alarming.
In order to strengthen function further, described system also comprises gas sensor (7), strain gauge (8), hoop metal tape (9), environment temperature sensor (10), ambient humidity sensor (11).
Wherein gas sensor (7) measures gas around cable splice and smog and concentration thereof, and the data recorded give Survey control module (1), judge whether cable splice has insulation overheat to produce aging and damage.During cable splice insulation overheat, insulating material decomposes, and produces the gases such as methane, carbon monoxide, carbon dioxide and water vapour, even forms smog because of a large amount of volatilization of the liquid such as its analyte phenylethyl alcohol, cumyl alcohol.When the concentration of the concentration of the gases such as the methane around cable splice, carbon monoxide, carbon dioxide or analyte generation smog exceedes limit value, send early warning signal.Be used for improving the accuracy of Gernral Check-up and early warning.
Wherein strain gauge (8) measures the change of cable splice external stress, and the data recorded give Survey control module (1), the expansion status of computational analysis cable splice and the respiratory frequency of generation.When cable splice expands and refers to cable splice insulation overheat, insulating material decomposes a large amount of gas of generation and liquid analyte, makes cable splice internal pressure become large, and then causes the expansion of cable splice; When respiration refers to that cable splice inside and outside temperature changes, the insulating gel in joint expands with heat and contract with cold, formed inner air and outer air exchange, thus moisture invade, condense in inwall and the gap of joint, make insulation decline and breakdown.
When cable splice expands with respiration, hoop metal tape (9) is positioned at cable splice outside, and auxiliary strain gauge (8) measures the STRESS VARIATION of cable splice outside, when the pressure of cable splice exceedes limit value, sends alerting signal; Or when respiratory frequency is too high, illustrates that cable joint working environment is severe, send early warning signal, the accuracy of Gernral Check-up and early warning can be improved.
Wherein environment temperature sensor (10) and ambient humidity sensor (11) detection streamer joint operating ambient temperature and humidity, the data recorded give Survey control module (1), judge that environment temperature is too high or ambient humidity is too high, then send early warning signal.When environment temperature and ambient humidity too high time, all illustrate that cable joint working environment is deteriorated, the possibility that goes wrong increases, and needs to send early warning signal, reminds operations staff to improve cable joint working environment in time, notes maintenance simultaneously and observes.
Display module (3) in described system for show cable splice and run state, parameter, early warning and warning message, alarm module (4) is for sending early warning and alerting signal.The state that cable splice runs comprises normal, abnormal and fault three kinds of states, when cable splice is in normal running status, shows the various normal operational parameters measured; When cable splice is in abnormal namely unsound running status, shows the current various operational factor and abnormal reason etc. that measure, and send early warning signal by alarm module (4); When cable splice is in the running status of fault, shows the current various operational factor that measures and fault parameter, and send alerting signal by alarm module (4).
In order to increase work efficiency and intelligence degree, described system also comprises control center server (12), exchange data through communication module (2) and Measurement and analysis module (1), comprise the operational factor under various running status, anomaly parameter, slave computer parameter configuration, remote alarms and early warning, Long-distance Control etc.
Compared with prior art, tool of the present invention has the following advantages:
Adopt humidity sensor in conjunction with the mode of temperature sensor, except carrying out except temperature alarm, the early warning of exploding can also be realized; Adopt gas sensor, the information of cable splice insulation ag(e)ing and damaged condition can be obtained; Adopt strain gauge, the expansion status of cable splice can be obtained and respiratory frequency information occurs; The mode adopting environment temperature sensor and ambient humidity sensor to combine, can obtain the fine or not degree of external environment condition during cable splice work, thus shows that cable splice goes wrong the size of possibility, determines whether to remind operations staff note maintenance and observe.
The on-line monitoring mode adopting the cheap general purpose transducer of multiple pricing to combine, comprehensively measures the parameter of cable splice ruuning situation, while making wananty costs lower, substantially increases sensitivity and the accuracy of early warning system.
The mode of reporting to the police after being different from current fault, the unhealthy condition run for cable splice and running environment carry out Measurement and analysis, realize Gernral Check-up and the fault pre-alarming of cable splice, can effectively prevent trouble before it happens, improve the reliability of cable splice and even Operation of Electric Systems, accelerate the fault handling time of cable splice, greatly reduce the economic loss because cable and junction malfunction causes.
Accompanying drawing explanation
Fig. 1: cable splice Gernral Check-up and hot fault warning system schematic diagram.
Fig. 2: sensor scheme of installation.
In figure: 1-Survey control module, 2-communication module, 3-display module, 4-alarm module, 5-temperature sensor, 6-humidity sensor, 7-gas sensor, 8-strain gauge, 9-hoop metal tape, 10-environment temperature sensor, 11-ambient humidity sensor, 12-control center server.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
In Fig. 1, described system is made up of Survey control module (1), communication module (2), display module (3), alarm module (4), temperature sensor (5), humidity sensor (6), gas sensor (7), strain gauge (8), environment temperature sensor (10), ambient humidity sensor (11), control center server (12).
The temperature of cable splice inside measured by temperature sensor (5), and data are given Survey control module (1), computational analysis temperature exceedes time span, the number of times of setting limit value, and account for the ratio of unit working time, after this ratio exceedes setting safety value, then judge cable splice place and unhealthy running status.
The humidity of cable splice inside measured by humidity sensor (6), and data are given Survey control module (1), and whether computational analysis humidity exceedes the limit value of setting, when exceeding, then judges that cable splice is in unhealthy running status.While Survey control module (1) judges that humidity exceedes the limit value of setting, if temperature exceedes the critical value of setting, then carry out the early warning of exploding.
Gas sensor (7), measure gas around cable splice and smog and concentration thereof, the data recorded give Survey control module (1), for judging whether cable splice produces aging because of insulation overheat and damage.
Strain gauge (8) measures the STRESS VARIATION of cable splice, and the data recorded give Survey control module (1), the expansion status of computational analysis cable splice and the respiratory frequency of generation.
Environment temperature sensor (10) and ambient humidity sensor (11), detection streamer joint operating ambient temperature and humidity, the data recorded give Survey control module (1), when judging that environment temperature is too high or ambient humidity is too high, send early warning signal.
State, parameter, early warning and warning message that cable splice runs by Survey control module (1) send display module (3) to show in real time, alarm module (4) is driven to report to the police, be uploaded to control center server (12) by communication module (2) unloading or through network, and with its exchange data.
The deployment scenarios of visible described each sensor in Fig. 2, temperature sensor (5) and humidity sensor (6) are installed on cable splice inside; Gas sensor (7) is installed on cable splice outside; Hoop metal tape (9) ring set is on cable splice, and strain gauge (8) is placed between hoop metal tape (9) and cable splice; Environment temperature sensor (10) and ambient humidity sensor (11) are installed on cable splice outside, also can be arranged in the electrical cabinet body residing for cable splice.
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. cable splice Gernral Check-up and hot fault warning system, is characterized in that: system comprises Survey control module (1), communication module (2), display module (3), alarm module (4), temperature sensor (5), humidity sensor (6);
The temperature of cable splice inside measured by temperature sensor (5), and data are given Survey control module (1), computational analysis temperature exceedes time span, the number of times of setting limit value, and account for the ratio of unit working time, after this ratio exceedes setting safety value, then judge cable splice place and unhealthy running status;
The humidity of cable splice inside measured by humidity sensor (6), and data are given Survey control module (1), and whether computational analysis humidity exceedes the limit value of setting, when exceeding, then judges that cable splice is in unhealthy running status;
While Survey control module (1) judges that humidity exceedes the limit value of setting, if temperature exceedes the critical value of setting, then carry out the early warning of exploding;
State, parameter, early warning and warning message that cable splice runs by Survey control module (1) send display module (3) to show in real time, drive alarm module (4) to report to the police, by communication module (2) unloading or upload through network.
2. cable splice Gernral Check-up according to claim 1 and hot fault warning system, it is characterized in that: system comprises gas sensor (7), measure gas around cable splice and smog and concentration thereof, the data recorded give Survey control module (1), judge whether cable splice produces aging because of insulation overheat and damage.
3. cable splice Gernral Check-up according to claim 1 and hot fault warning system, it is characterized in that: system comprises strain gauge (8), outside hoop metal tape (9) of cable splice, its STRESS VARIATION is measured by strain gauge (8), the data recorded give Survey control module (1), the expansion status of computational analysis cable splice and the respiratory frequency of generation.
4. cable splice Gernral Check-up according to claim 1 and hot fault warning system, it is characterized in that: system comprises environment temperature sensor (10) and ambient humidity sensor (11), detection streamer joint operating ambient temperature and humidity, the data recorded give Survey control module (1), when judging that environment temperature is too high or ambient humidity is too high, then send early warning signal.
5. cable splice Gernral Check-up according to claim 1 and hot fault warning system, it is characterized in that: system comprises control center server (12), Survey control module (1) exchanges data through communication module (2) and control center server (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510049419.0A CN104568016A (en) | 2015-01-31 | 2015-01-31 | Cable joint health diagnosis and heat fault pre-warning system |
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| CN201510049419.0A CN104568016A (en) | 2015-01-31 | 2015-01-31 | Cable joint health diagnosis and heat fault pre-warning system |
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| CN105181026A (en) * | 2015-10-29 | 2015-12-23 | 国网山东高唐县供电公司 | Device for displaying statuses of electrical cabinets |
| CN107764424A (en) * | 2017-09-15 | 2018-03-06 | 国网浙江嘉善县供电公司 | A kind of cable intermediate joint temperature rise on-Line Monitor Device and method based on temperature difference method |
| CN108195421A (en) * | 2017-12-25 | 2018-06-22 | 安徽博达通信工程监理有限责任公司 | One kind is based on infrared ray cable ageing management communication system |
| CN108761280A (en) * | 2018-04-04 | 2018-11-06 | 国家电网公司 | A kind of method and system of cable connector Gernral Check-up |
| CN110196378A (en) * | 2019-05-24 | 2019-09-03 | 北京海益同展信息科技有限公司 | Inside plant detection method, device, equipment and storage medium |
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| CN111157819A (en) * | 2019-12-31 | 2020-05-15 | 国网北京市电力公司 | Detection system and detection method for water resistance of joint |
| CN111579106A (en) * | 2020-05-06 | 2020-08-25 | 深圳供电局有限公司 | Cable on-line monitoring device and system |
| CN111965488A (en) * | 2020-08-12 | 2020-11-20 | 广东电网有限责任公司 | Fault indicator, cable and cable shaft |
| CN112200997A (en) * | 2020-09-10 | 2021-01-08 | 国网福建省电力有限公司检修分公司 | Extra-high voltage cable remote locking fire prevention and control device |
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| CN105181026A (en) * | 2015-10-29 | 2015-12-23 | 国网山东高唐县供电公司 | Device for displaying statuses of electrical cabinets |
| CN105181026B (en) * | 2015-10-29 | 2016-11-23 | 国网山东省电力公司高唐县供电公司 | Regulator cubicle |
| CN107764424A (en) * | 2017-09-15 | 2018-03-06 | 国网浙江嘉善县供电公司 | A kind of cable intermediate joint temperature rise on-Line Monitor Device and method based on temperature difference method |
| CN108195421A (en) * | 2017-12-25 | 2018-06-22 | 安徽博达通信工程监理有限责任公司 | One kind is based on infrared ray cable ageing management communication system |
| CN108761280A (en) * | 2018-04-04 | 2018-11-06 | 国家电网公司 | A kind of method and system of cable connector Gernral Check-up |
| CN110196378A (en) * | 2019-05-24 | 2019-09-03 | 北京海益同展信息科技有限公司 | Inside plant detection method, device, equipment and storage medium |
| CN110513822A (en) * | 2019-08-19 | 2019-11-29 | Tcl空调器(中山)有限公司 | A kind of air-conditioner control method, storage medium and air conditioner |
| CN110513822B (en) * | 2019-08-19 | 2021-08-03 | Tcl空调器(中山)有限公司 | Air conditioner control method, storage medium and air conditioner |
| CN112945405A (en) * | 2019-12-11 | 2021-06-11 | Abb瑞士股份有限公司 | Temperature determination device |
| CN110940895A (en) * | 2019-12-17 | 2020-03-31 | 四川赛康智能科技股份有限公司 | Cable joint explosion-proof fire-extinguishing and temperature, partial discharge comprehensive on-line monitoring device |
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Application publication date: 20150429 |