CN105203700A - Real-time early warning system for internal environment of high-voltage cable branch boxes - Google Patents

Real-time early warning system for internal environment of high-voltage cable branch boxes Download PDF

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Publication number
CN105203700A
CN105203700A CN201410262593.9A CN201410262593A CN105203700A CN 105203700 A CN105203700 A CN 105203700A CN 201410262593 A CN201410262593 A CN 201410262593A CN 105203700 A CN105203700 A CN 105203700A
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CN
China
Prior art keywords
monitoring
early warning
smoke
smell
voltage cable
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
Application number
CN201410262593.9A
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Chinese (zh)
Inventor
黄知超
莫深森
苏晓鹏
钟文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANNING GUANGKAI ELECTRICAL CO Ltd
Guilin University of Electronic Technology
Original Assignee
NANNING GUANGKAI ELECTRICAL CO Ltd
Guilin University of Electronic Technology
Priority date (The priority date 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 date listed.)
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Application filed by NANNING GUANGKAI ELECTRICAL CO Ltd, Guilin University of Electronic Technology filed Critical NANNING GUANGKAI ELECTRICAL CO Ltd
Priority to CN201410262593.9A priority Critical patent/CN105203700A/en
Publication of CN105203700A publication Critical patent/CN105203700A/en
Pending legal-status Critical Current

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Abstract

The invention provides a real-time early warning system for internal environment of high-voltage cable branch boxes. An inducting energy obtaining power source, a smell sensor, a smoke sensor and a monitoring device are arranged in each branch box, wherein the inducting energy obtaining power source, the smell sensor and the smoke sensor are connected with monitoring devices, and the monitoring devices are connected with an upper computer or mobile monitoring equipment by means of wireless communication. According to the early warning system, the smell sensors and the smoke sensors are adopted for monitoring the internal environment of the high-voltage cable branch boxes in real time, concentration of smells and smoke serves as a criterion for early warning of cable connector faults in the branch boxes, equipment cost is low, installing and using are convenient, a threshold value can be adjusted according to actual conditions, false alarms and alarm failure can be avoided by means of double monitoring over the smells and the smoke, and the system is suitable for power supply and distribution networks in large and medium cities, and particularly suitable for real-time early warning of the high-voltage cable branch boxes in the complex environment with heavy external smoke, or varied external smells or haze.

Description

High-Voltage Cable Branching Case internal environment real-time early warning system
Technical field
The present invention relates to power cable transmission and distribution network, be specifically related to high-voltage cable joint fault handling, more specifically High-Voltage Cable Branching Case internal environment real-time early warning system.
Background technology
Power industry is basis and the industry in advance of national economic development, has very important status in the development of the national economy.The basic task of electric system be " safety, reliable, high-quality " supply electric energy.With the fast development of Chinese national economy, the raising of urban construction and modernization of industry degree, the power industry as lifelines of the national economy encounters unprecedented challenge.
In the electric power system of city and large and medium-sized enterprise, adopt power cable power transmission and distribution more and more.Usually cable splice will be there is on the line when power supply distance is longer, in reality, just there is place's cable splice in approximately every 300 meters of city mesohigh service cable, in order to reduce the difficulty of technology and construction in a lot of situation, is arranged on by cable splice in service cable distribution box.Cable distribution box is a kind of indoor or outdoor installation, is usually installed on the ground such as curbside, roadside or community, for carrying out tap, branch to cable line, continuing or change.
Cable distribution box is used widely with its feature such as economic, reliable, easy to maintenance, and its all insulation, hermetic architectural characteristic make line fault greatly reduce.The hinge that distribution box collects as electric energy and distributes, plays an important role in urban distribution network safe operation, but, in order to reduce the difficulty of technology and construction in a lot of situation, cable splice is arranged in service cable distribution box.It is overheated that cable splice easily occurs under long-time, big current (overload) service condition, causes accident.Little, cause and user is had a power failure for a long time, the chain reaction of cable line peripherals may be caused time serious and break down, even may cause distribution system part or major part paralysis, have a strong impact on the safe and reliable operation of electric system, caused huge economic loss.Cable splice oneself become one of weak link in the safe operation of service cable net, the cable distribution box accident overwhelming majority is because the cable and junction malfunction in distribution box causes.According to statistics, cable splice accident rate accounts for 90% of cable fault.
At present mainly by judging whether it breaks down to the detection of temperature of cable junction, mainly there is following shortcoming in this mode:
1, cost is high: because distribution box inside cable joint quantity is more, the cable in distribution box generally has more than 6, and every root cable needs installation sensor, and thus number of sensors is more, and equipment cost is large.
2, not easily realize: the unpromising reload temperature sensor of distribution box inside cable joint design reserves space at present.
3, difficulty is installed: temperature sensor needs directly to contact high voltage cable conductor thread core, and installation site insulation processing is more difficult.
Summary of the invention
In order to overcome the deficiencies in the prior art, accomplishing can forecast that fault likely produces in advance, the invention provides High-Voltage Cable Branching Case internal environment real-time early warning system.
Cable and junction malfunction is actually a progressive formation, and temperature variation can not react the situation of this gradual change.Cable, from insulation ag(e)ing, is superheated to and causes fire, has the longer time, in this time period usually with from the aging generation smell of insulation course, produce smell to burning and produce smog, until produce a large amount of very nifves to accompany a large amount of smog.Therefore can develop cable distribution box internal environment real-time early warning system for this feature, using smell and smog as monitoring target, forecast the possibility that fault produces in advance, whether Judging fault produces.
Cable distribution box internal environment early warning system that design a kind of low cost, that be easy to realization, by detecting the smell of distribution box inside and the concentration of smog, before distribution box inside cable joint fault occurs, accurate early warning is carried out to distribution box inside cable joint fault, notify that staff overhauls cable splice, the generation of prevention cable and junction malfunction, object of the present invention that Here it is.
To achieve these goals, High-Voltage Cable Branching Case internal environment real-time early warning system of the present invention, in its each distribution box, induction energy fetching power supply, smell sensor, smoke transducer and monitoring device are set, induction energy fetching power supply, smell sensor are all connected monitoring device with smoke transducer, and monitoring device connects host computer or mobile monitoring device by radio communication.
Smell sensor and smoke transducer are used for the environmental aspect in real-time detection streamer distribution box, convert the concentration of the smell detected and smog to signal and be transferred to monitoring device respectively, the smell that monitoring device Real-Time Monitoring smell sensor and smoke transducer transmit and smokescope signal, when the signal that monitoring device receives exceedes default threshold value, monitoring device automatically can send different alerting signals (for distinguishing smell and smog) by network communication and transmission to Managing system of above position machine or directly send note to monitor staff, after Managing system of above position machine receives alerting signal, monitor staff notifies that operations staff overhauls distribution box inside cable joint.
In order to more accurately judge the smell in High-Voltage Cable Branching Case, avoid occurring wrong report because of other smell (as mouse dung urine odor), early warning system of the present invention, its smell sensor selects the smell sensor to the odor-sensitive that high voltage cable sends.
The GSM/GPRS module that monitoring device of the present invention comprises single-chip microcomputer and is attached thereto.The signal that single-chip microcomputer comes for receiving smell sensor and smoke transducer transmission, and compare (preset threshold value) and process, alerting signal can be delivered to GSM/GPRS module again when needs send alerting signal.
Therefore, in the present invention, induction energy fetching power supply, smell sensor and smoke transducer are all connected the single-chip microcomputer of monitoring device.
GSM/GPRS module in monitoring device is communicated to connect by wireless network and host computer or mobile monitoring device.
Induction energy fetching power supply is used for providing working power to monitoring device, and it comprises inductive coil and latter linked rectification circuit, filtering circuit and mu balanced circuit.Induction energy fetching power supply utilizes electromagnetic induction principle, responds to alternating voltage by inductive coil from high voltage bus or circuit, then after overcommutation, filtering, voltage stabilizing for monitoring device is powered, solve the powerup issue of monitoring device.
For ease of signal transacting, A/D change-over circuit is set at smell sensor and between smoke transducer and monitoring device (that is single-chip microcomputer), for converting smell and smokescope data to stable signal.
Check and handling failure for ease of scene, described early warning system of the present invention also comprises the on-the-spot man-machine interaction circuit be connected with monitoring device.
High-Voltage Cable Branching Case internal environment real-time early warning system of the present invention, smell sensor described in it and smoke transducer are non-contact measurement apparatus, can not forceful electric power be incorporated in measurement mechanism, thus not need to take high-grade insulation measures to the measurement mechanism in early warning system.
The invention has the advantages that:
1, each distribution box only needs a smell sensor and smoke transducer, and the quantity of sensor greatly reduces, and cost reduces.
2, because distribution box inside has enough spaces to install smell sensor and smoke transducer additional, be easy to realize the detection to distribution box internal environment conditions.
3, because cable and junction malfunction is a progressive formation, in this process, it is aging that distribution box inside cable insulate, and makes the concentration of the smell in distribution box and smog have obvious change, therefore by the detection to smell and smog, fault pre-alarming can be carried out to cable splice exactly.
4, by smell and smog double monitoring, dual-alarm, on host computer or monitor staff's mobile phone difference display, thus can make monitor staff can analysis and distinguishing be out of order type, fault occur possibility and fault degree.When there is no smog alert when scent of alarm, illustrate that fault is being formed, but be not very serious, at this moment carry out maintenance in time and just can trouble-savingly occur.When not having smell alarm when there being smog alert, likely smog is not from high voltage cable, but caused by ectocine (smog produced as other substance combustion around distribution box enters in distribution box), does not at this moment just need power-off to keep in repair.If not only scent of alarm but also have smog alert, then can conclude that distribution box there occurs fault substantially, although or what occur is that outside emergency situation has injured distribution box, distribution box likely can be broken down immediately.
High-Voltage Cable Branching Case internal environment real-time early warning system of the present invention, smell sensor and smoke transducer is adopted to carry out Real-Time Monitoring to High-Voltage Cable Branching Case internal environment state, using the criterion of the concentration of smell and smog as the early warning of distribution box inside cable joint fault, equipment cost is low, install, easy to use, threshold value can be adjusted according to actual conditions, smell and smog double monitoring can be avoided wrong report and fail to report, big and medium-sized cities distribution network can be suitable for, be particularly suitable for being in complex environment (as larger in outside smog, or external smells is very assorted, or haze etc.) the real-time early warning of High-Voltage Cable Branching Case.
Accompanying drawing explanation
Fig. 1 is High-Voltage Cable Branching Case internal environment real-time early warning system architecture diagram of the present invention.
Embodiment
See Fig. 1.Smell sensor connects an interface of the single-chip microcomputer in pick-up unit through A/D change-over circuit, smoke transducer connects an interface of the single-chip microcomputer in pick-up unit through A/D change-over circuit, after two paths of signals processes by single-chip microcomputer respectively, according to the comparison result with predetermined threshold value, determine whether to need to report to the police.When exceeding threshold value and needing to report to the police, alerting signal is sent to GSM/GPRS module by single-chip microcomputer, is sent to host computer or mobile monitoring device by it by network wireless.
Comprise inductive coil and latter linked rectification circuit thereof, filtering circuit is connected single-chip microcomputer with the induction energy fetching power supply of mu balanced circuit.
On-the-spot man-machine interaction circuit connects single-chip microcomputer.
High-Voltage Cable Branching Case internal environment real-time early warning system of the present invention, is placed in High-Voltage Cable Branching Case, does not directly contact with high voltage cable.The inductive coil of induction energy fetching power supply is placed near high voltage bus, for responding to alternating voltage.

Claims (8)

1. High-Voltage Cable Branching Case internal environment real-time early warning system, comprise sensor, it is characterized in that: induction energy fetching power supply, smell sensor, smoke transducer and monitoring device are set in each distribution box, induction energy fetching power supply, smell sensor are all connected monitoring device with smoke transducer, and monitoring device connects host computer or mobile monitoring device by radio communication.
2. early warning system according to claim 1, is characterized in that: smell sensor selects the smell sensor to the odor-sensitive that high voltage cable sends.
3. early warning system according to claim 1, is characterized in that: the GSM/GPRS module that monitoring device comprises single-chip microcomputer and is attached thereto.
4. the early warning system according to claim 1 or 3, is characterized in that: induction energy fetching power supply, smell sensor and smoke transducer are all connected the single-chip microcomputer of monitoring device.
5. the early warning system according to claim 1 or 3, is characterized in that: the GSM/GPRS module in monitoring device is communicated to connect by wireless network and host computer or mobile monitoring device.
6. early warning system according to claim 1, is characterized in that: induction energy fetching power supply comprises inductive coil and latter linked rectification circuit, filtering circuit and mu balanced circuit.
7. early warning system according to claim 1, is characterized in that: between monitoring device, arrange A/D change-over circuit at smell sensor and smoke transducer.
8. early warning system according to claim 1, is characterized in that: also comprise the on-the-spot man-machine interaction circuit be connected with monitoring device.
CN201410262593.9A 2014-06-13 2014-06-13 Real-time early warning system for internal environment of high-voltage cable branch boxes Pending CN105203700A (en)

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CN201410262593.9A CN105203700A (en) 2014-06-13 2014-06-13 Real-time early warning system for internal environment of high-voltage cable branch boxes

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Application Number Priority Date Filing Date Title
CN201410262593.9A CN105203700A (en) 2014-06-13 2014-06-13 Real-time early warning system for internal environment of high-voltage cable branch boxes

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CN106197551A (en) * 2016-08-23 2016-12-07 安徽博达通信工程监理有限责任公司 Circuit section environmental test system preset by a kind of cable duct
CN106442241A (en) * 2016-09-08 2017-02-22 哈尔滨工程大学 Air PM value detecting device and method based on GSM wireless transmission
CN110602637A (en) * 2019-10-12 2019-12-20 董波 Ancient building environmental protection system based on wireless sensor
CN114047303A (en) * 2022-01-04 2022-02-15 南京天创电子技术有限公司 Cable scorching smell continuous detection method based on inspection robot

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106197551A (en) * 2016-08-23 2016-12-07 安徽博达通信工程监理有限责任公司 Circuit section environmental test system preset by a kind of cable duct
CN106442241A (en) * 2016-09-08 2017-02-22 哈尔滨工程大学 Air PM value detecting device and method based on GSM wireless transmission
CN110602637A (en) * 2019-10-12 2019-12-20 董波 Ancient building environmental protection system based on wireless sensor
CN110602637B (en) * 2019-10-12 2021-02-09 滁州绿建环境咨询有限公司 Ancient building environmental protection system based on wireless sensor
CN114047303A (en) * 2022-01-04 2022-02-15 南京天创电子技术有限公司 Cable scorching smell continuous detection method based on inspection robot
CN114047303B (en) * 2022-01-04 2022-04-12 南京天创电子技术有限公司 Cable scorching smell continuous detection method based on inspection robot

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Application publication date: 20151230