CN105371967A - Power cable joint temperature measuring device - Google Patents

Power cable joint temperature measuring device Download PDF

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Publication number
CN105371967A
CN105371967A CN201410400254.2A CN201410400254A CN105371967A CN 105371967 A CN105371967 A CN 105371967A CN 201410400254 A CN201410400254 A CN 201410400254A CN 105371967 A CN105371967 A CN 105371967A
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CN
China
Prior art keywords
module
temperature
data
cable joint
monitoring
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Pending
Application number
CN201410400254.2A
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Chinese (zh)
Inventor
张猛
任建文
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North China Electric Power University
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North China Electric Power University
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Publication date
Application filed by North China Electric Power University filed Critical North China Electric Power University
Priority to CN201410400254.2A priority Critical patent/CN105371967A/en
Publication of CN105371967A publication Critical patent/CN105371967A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a power cable joint temperature measuring device which comprises the components of a temperature measuring sensor module, a data receiving and processing module, a wireless communication module, a display module, a storage module, an alarm module and a power module. The temperature measuring sensor is arranged on the grounded part of the outer conductive layer of the power cable joint. Data which are measured by the temperature measuring sensor are transmitted to the data receiving and processing module through the wireless communication module for being processed. The storage module is used for storing failure information. The display module is a projection type capacitive touch screen and can display a cable joint temperature result which is obtained through monitoring. Furthermore the display module can set a temperature monitoring mode through a screen menu and inquires a historical record. The power module supplies electric power for the whole system. When overhigh temperature of the cable joint occurs, a monitoring result is displayed on the screen, and simultaneously the fault information is transmitted to the alarm module. Related personnel can understand the fault condition timely and accurately through the screen and the alarm information, thereby facilitating maintenance and emergency repair of the cable.

Description

Power cable joint temperature-measuring device
Technical field
The invention belongs to power supply technique field, particularly relate to a kind of power cable joint temperature-measuring device.
Background technology
Power cable is for transmitting and distribute the cable of electric energy in electric system, compared with powering with pole line, power cable power have that power transmission reliability is high, between line insulation distance little, take up an area and less, do not take up an area space of planes, strong security and easily significantly improve the advantages such as power supply capacity.Therefore, along with the development of urbanization and urban distribution network, power cable is used widely.But in use power cable also have that cost is high, fault detect and maintenance is more difficult, the technological requirement of electric cable fitting (intermediate head, no-go sub etc.) is high, on-site construction operations needs staff to possess the shortcomings such as higher operation level.Along with the increase of cable usage quantity, the raising of transmission line capability, once harm of breaking down is serious, therefore the operational reliability of power cable more and more comes into one's own.
In supply line, cable intermediate joint is the weakest link in safe operation of power system.According to statistics, cable splice accident rate accounts for 90% of cable fault.Reason is that cable splice exists the problems such as loose contact, crimp head are not tight, dielectric strength damage, power load increase or heat environment under the exception of temperature all may be caused to raise, cable not only may be caused to damage, also must cause large-area power failure simultaneously, even may initiation fire accident.
Reduce the measure of intermediate head fault, should stress on the one hand to improve cable product quality, field fabrication technique, monitoring and diagnosis should be strengthened on the other hand.The main monitoring means of current power cable has insulation resistance on-line monitoring, tan δ on-line monitoring, partial discharge monitoring, DC component method on-line monitoring, on-line temperature monitoring etc.Wherein temperature is the important parameter of reflection cable running status as a non-electric quantity.All kinds of fault of intermediate head be not a burst procedures, normally because temperature constantly raise, insulation ag(e)ing, thermal contact resistance increase, leakage current is increased to a certain degree and again thermal breakdown occurs, and is the process of a quantitative change to qualitative change.By Real-Time Monitoring Joint Temperature, analysis of history data can determine insulation defect position, grasp intermediate head insulation status.In addition, the current-carrying capacity of power cable is crossed conference and is caused cable core working temperature to exceed allowable value, causes the insulation life of cable just to shorten than expectation value; Too small core copper material or the aluminium of making again of current-carrying capacity can not be fully utilized, and can be calculated the object that core conductor temperature reaches regulation and control load, dynamic compatibilization by the temperature value measured in real time for this reason.
In sum, to effective monitoring of Power Cable Joint Temperature, can local hot spot be determined by Real-Time Monitoring value and historical temperature value, judge insulation ag(e)ing situation, Timeliness coverage potential safety hazard; Can also calculate core conductor temperature by Real-Time Monitoring value, in allowed band, Appropriate application power cable capacity regulation and control load, dynamic compatibilization, all significant for guarantee Power System Reliability, stability, economy etc. simultaneously.
ZigBee technology is a kind of short distance, low complex degree, low-power consumption, low data rate, the two-way wireless communication technology of low cost or radio network technique, working in the international free frequency range ISM (Industria1ScientificMedicalBand) of 2.4GHz without the need to registration, is the communication technology of one group of relevant networking developed based on IEEE802.15.4 wireless standard, safety and application software aspect.Relative to existing various wireless communication technology, ZigBee technology is the technology of lowest power consumption and cost, because Zigbee possesses skills the little feature of the low and communication range of data rate, determining ZigBee technology to be suitable for carrying the less business of data traffic, is the preferably selection of wireless sensor network.
Summary of the invention
The object of this invention is to provide a kind of power cable joint temperature-measuring device, can the temperature variation of effective monitoring power cable joint, improve the work efficiency that cable splice is safeguarded.
The present invention adopts following technical scheme: the present invention relates to a kind of power cable joint temperature-measuring device, comprise temperature probe module, data receiver and processing module, wireless communication module, display module, memory module, alarm module and power module; Temperature probe is arranged at the grounded part of the outer conducting layer of power cable connector, its measurement data sends into data receiver by wireless communication module and processing module processes, send warning information to alarm module when monitoring temperature anomaly, failure message is stored in memory module; Display module is projection-type capacitive touch screen, can show the temperature of cable junction value and result of monitoring and obtaining, the condition simultaneously can monitored by on-screen menu design temperature, query history record; Power module provides electric energy for whole system.
Described a kind of power cable joint temperature-measuring device, the probe number of its each temperature probe is set to 5, be arranged on the point for measuring temperature place that cable splice is representative, can the processing mode of setting data in display module, get the representative data of maximal value as each temperature probe of Monitoring Data here.
Described a kind of power cable joint temperature-measuring device, its data receiver and processing module are to the comparing of duration of monitoring the temperature data obtained and carrying out Temperature numerical, temperature rate-of-rise and exceeding a certain temperature.
Described a kind of power cable joint temperature-measuring device, its wireless communication module is Zigbee wireless telecommunications, and responsible temperature probe and the data between data receiver and processing module are transmitted.
The invention provides a kind of power cable joint temperature-measuring device, when there are abnormal conditions in the temperature of cable splice, temperature data is sent to data acquisition and procession module by Zigbee wireless communication module and is processed by temperature probe, and result is presented on tangible screen.The result of temperature monitoring can be checked by screen, the historical data in display certain hour section, and can set the data processing method of device.Staff can understand failure condition comparatively in detail accurately, realizes the real-time monitoring to temperature of cable junction.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention.
Embodiment
Below in conjunction with Figure of description and embodiment, the invention will be further described.
The embodiment of the present invention provides a kind of power cable joint temperature-measuring device, can the temperature variation of effective monitoring power cable joint, improves the work efficiency that cable splice is safeguarded.As shown in Figure 1, comprise temperature probe module, data receiver and processing module, wireless communication module, display module, memory module, alarm module and power module to form; Temperature probe is arranged at the grounded part of the outer conducting layer of power cable connector, and its measurement data sends into data receiver and processing module; If process obtains the instruction needing alarm as calculated, data receiver and processing module send a warning message to alarm module, and result is sent to display module show, simultaneously by failure message stored in memory module, conveniently carry out historical query analysis.Display module is projection-type capacitive touch screen, the temperature of cable junction result of monitoring and obtaining can be shown, the condition that simultaneously can be detected by on-screen menu design temperature, query history record, also can be managed storage data by display module staff.Power module provides electric energy for whole system.
The volume ratio considering cable splice is comparatively large, and 1 temperature probe can not the temperature of comprehensive and accurate measurement cable splice, and the probe number of temperature probe is set to 5 for this reason, is arranged on the point for measuring temperature place that cable splice is representative.Consider that again the increase of temperature probe number can increase data transmission and the burden of process, in observation process, read the temperature value of 5 temperature probes for this reason successively, get maximal value more afterwards and be wirelessly sent to data receiver and processing module.
About the process of temperature data, selective temperature numerical value, temperature rate-of-rise and exceed the typical data of duration as intermediate joint of electric cable thermometric of a certain temperature.
Namely Temperature numerical is carried out size according to measured temperature numerical value with a certain setting threshold value and is compared, and carries out reporting to the police or controlling, and this Measures compare is direct, implements simple and reliable; Selective temperature climbing speed be because measurand under normal conditions its temperature rise rate be fixing or lower, and temperature rate-of-rise is general larger in case of a fault, normal condition and malfunction can be identified by measuring tempeature climbing speed, an advantage of measuring tempeature climbing speed is that real-time is higher, as long as measurand failure condition is once occurring to be monitored to by its temperature rise rate; Measure the duration exceeding a certain temperature, because some measurand allows to bear the high temperature of short time, temperature may drop to normal range after a certain time, does not so just need to report to the police, and this Method Of Time Measurement can avoid impact and some short-term effects of some disturbing factors.
Data receiver and processing module process according to above 3 kinds of algorithms the temperature data received, and acquired results is transferred to display module and shows.Alarming processing for temperature is divided into two steps, and the first step comprises duration and the temperature rate-of-rise two parts content measuring and exceed a certain temperature.Order records duration of exceeding a certain temperature and a certain threshold value compares, if measured value is greater than threshold value, thinks that cable splice may have occurred failure condition; Equally, if the temperature rate-of-rise detected in section is sometime greater than the situation of certain setting value, also assert that cable splice is in the state of possible breakdown.These two parts detect and carry out simultaneously, the relation of "or" between the two, as long as wherein there is the situation exceeding setting value in a kind of measured value, the detection of start-up temperature numerical value with compare, be greater than setting value and then send alarm signal to alarm signal module, monitoring calculation result is delivered to display module simultaneously and show.
Display module selects projection-type capacitive touch screen, and due to it, to have durable, transmittance better and support the advantages such as multi-point touch, can as good human-computer interaction interface.
Staff can be observed by display module and monitor the temperature of cable junction result that obtains, transfers the analysis that historical data is carried out specifically, also can data in managed storage module, does to analyze further to warning information.Staff can also be set by the Temperature Treatment mode of display module to temperature measuring equipment, can set and only detect or temperature rate-of-rise detecting pattern by Temperature numerical, also can be set as more complicated monitoring mode.
Described wireless communication module is Zigbee wireless telecommunications, and responsible temperature probe and the data between data receiver and processing module are transmitted.Zigbee module has contained all peripheral circuits and complete protocol stack, can come into operation immediately, and user only needs the data of oneself to be sent in module by serial ports, can complete radio communication and networking function by arranging.
Temperature data is sent to data acquisition and procession module by Zigbee wireless communication module and is processed by temperature probe, and result is presented on tangible screen.The result of temperature monitoring can be checked by screen, the historical data in display certain hour section, and can set the data processing method of device.Staff can understand failure condition comparatively in detail accurately, realizes the real-time monitoring to temperature of cable junction.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred 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 (4)

1. the present invention relates to a kind of power cable joint temperature-measuring device, it is characterized in that, comprise temperature probe module, data receiver and processing module, wireless communication module, display module, memory module, alarm module and power module; Temperature probe is arranged at the grounded part of the outer conducting layer of power cable connector, its measurement data sends into data receiver by wireless communication module and processing module processes, send warning information to alarm module when monitoring temperature anomaly, failure message is stored in memory module; Display module is projection-type capacitive touch screen, can show the temperature of cable junction value and result of monitoring and obtaining, the condition simultaneously can monitored by on-screen menu design temperature, query history record; Power module provides electric energy for whole system.
2. a kind of power cable joint temperature-measuring device according to claim 1, it is characterized in that the probe number of each temperature probe is set to 5, be arranged on the point for measuring temperature place that cable splice is representative, in display module, the representative data of maximal value as each temperature probe of Monitoring Data is got in setting.
3. a kind of power cable joint temperature-measuring device according to claim 1, is characterized in that described data receiver and processing module are to the comparing of duration of monitoring the temperature data obtained and carrying out Temperature numerical, temperature rate-of-rise and exceeding a certain temperature.
4. a kind of power cable joint temperature-measuring device according to claim 1, is characterized in that described wireless communication module is Zigbee wireless telecommunications, and responsible temperature probe module and the data between data receiver and processing module are transmitted.
CN201410400254.2A 2014-08-15 2014-08-15 Power cable joint temperature measuring device Pending CN105371967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410400254.2A CN105371967A (en) 2014-08-15 2014-08-15 Power cable joint temperature measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410400254.2A CN105371967A (en) 2014-08-15 2014-08-15 Power cable joint temperature measuring device

Publications (1)

Publication Number Publication Date
CN105371967A true CN105371967A (en) 2016-03-02

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CN201410400254.2A Pending CN105371967A (en) 2014-08-15 2014-08-15 Power cable joint temperature measuring device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105703315A (en) * 2016-03-25 2016-06-22 国网山东省电力公司济宁供电公司 Cable terminal for totally enclosed switch equipment, assembly method and temperature measurement system
CN107680358A (en) * 2017-09-13 2018-02-09 南京弘毅电气自动化有限公司 A kind of cable connector field formula wireless temperature measurement system and temp measuring method
CN108225580A (en) * 2017-12-06 2018-06-29 国家电网公司 A kind of power cable temperature-measurindevice device and temp measuring method
CN111949053A (en) * 2019-05-17 2020-11-17 阿自倍尓株式会社 Temperature regulator and abnormality determination method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105703315A (en) * 2016-03-25 2016-06-22 国网山东省电力公司济宁供电公司 Cable terminal for totally enclosed switch equipment, assembly method and temperature measurement system
CN107680358A (en) * 2017-09-13 2018-02-09 南京弘毅电气自动化有限公司 A kind of cable connector field formula wireless temperature measurement system and temp measuring method
CN108225580A (en) * 2017-12-06 2018-06-29 国家电网公司 A kind of power cable temperature-measurindevice device and temp measuring method
CN111949053A (en) * 2019-05-17 2020-11-17 阿自倍尓株式会社 Temperature regulator and abnormality determination method

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Application publication date: 20160302