CN103887888A - Fuse protector on-line monitoring system - Google Patents

Fuse protector on-line monitoring system Download PDF

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Publication number
CN103887888A
CN103887888A CN201410156236.4A CN201410156236A CN103887888A CN 103887888 A CN103887888 A CN 103887888A CN 201410156236 A CN201410156236 A CN 201410156236A CN 103887888 A CN103887888 A CN 103887888A
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fuse
phase
unit
monitoring
monitoring terminal
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CN201410156236.4A
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CN103887888B (en
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胡波
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Chuzhou Kangneng Electric Co., Ltd.
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胡波
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Abstract

The invention belongs to the technical field of electric power circuit monitoring, and particularly relates to a fuse protector on-line monitoring system. The fuse protector on-line monitoring system comprises at least one fuse protector set, at least one monitoring terminal set, at least one communication terminal and a system main station. The fuse protector set is connected with the monitoring terminal set, the monitoring terminal set is connected with the communication terminal, and the communication terminal is connected with the system main station. A monitoring terminal monitors the current and voltage change of an electric power circuit through an analog circuit in a current and voltage monitoring unit and automatically recognizes the fault current and the corresponding voltage change so as to trigger a main processor to carry out the fault analysis and judgment, and an internal position sensor is utilized for automatically recognizing the position change of a fuse protector fusion tube so as to trigger the main processor to carry out the analysis and judgment on the disconnecting and connecting states of the fuse protector. The monitoring terminal is installed on the fuse protector, an external power source or other devices are not needed, the structure is simple, the overall power consumption is low, the terminal device is small, and installing is easy and convenient.

Description

A kind of fuse on-line monitoring system
Technical field
The invention belongs to power circuit monitoring technical field, be specifically related to a kind of fuse on-line monitoring system.
Background technology
Fuse is to exceed after setting a period of time according to electric current, and the heat producing with himself makes melt fusing, thereby circuit is disconnected; A kind of current protector that uses this principle to make.Fuse is widely used in high and low voltage electric distribution system and control system and power consumption equipment, as the protector of short circuit and overcurrent, is to apply one of the most general protection device.
Fuse is a kind of overcurrent protective device.Fuse is mainly made up of melt and fusion tube and the outer part such as filled.When use, fuse is series in protected circuit, when the electric current of protected circuit exceedes setting, and after certain hour, the heat fusing melt being produced by melt self, disconnects circuit, thereby plays the effect of protection.Divide the electrical equipment of deenergizing using metallic conductor as melt; be series in circuit; in the time transshipping or short circuit current passes through melt, melt self fuses heating, thereby electric power system, various electrical equipment and household electrical appliance have all been played to certain protective effect.Have inverse time lag characteristic, when overload current hour, fusing time is long; When overload current is large, fusing time is short.Therefore, within the scope of certain overload current, recover normal to electric current, fuse can not fuse, and can continue to use.Fuse is mainly made up of melt, shell and bearing 3 parts, and wherein melt is the key element of controlling operating chacteristics.
But fuse is mainly used in the large current failure protection of distribution network, does not possess intelligent functions.Fuse is in the process of work, service data and operating state that can not Real-time Collection fuse, therefore be difficult to judge the Performance and quality of fuse itself, also cannot grasp in time the electriferous state that stops of deciliter state of fuse and institute's on-load, also cannot, according to the operational factor of fuse place circuit and institute's on-load, realize repair based on condition of component simultaneously.
Summary of the invention
For solving the problems of the technologies described above, the invention discloses a kind of fuse on-line monitoring system.
A kind of fuse on-line monitoring system, comprise at least one fuse group, at least one monitoring terminal group, at least one communication terminal and system main website, described fuse group is connected with described monitoring terminal group, described monitoring terminal group is connected with described communication terminal, and described communication terminal is connected with described system main website.
Further, described fuse group comprises A phase fuse, B phase fuse and C phase fuse, described monitoring terminal group comprises A phase monitoring terminal, B phase monitoring terminal and C phase monitoring terminal, described A phase monitoring terminal is affixed with described A phase fuse, described B phase monitoring terminal is affixed with described B phase fuse, described C phase monitoring terminal is affixed with described C phase fuse, and described A phase monitoring terminal, described B phase monitoring terminal, described C phase monitoring terminal are connected with described communication terminal respectively.
Further, described A phase monitoring terminal, described B phase monitoring terminal, described C phase monitoring terminal are affixed with the fusion tube of the fusion tube of the fusion tube of described A phase fuse, described B phase fuse, described C phase fuse respectively by the mode of stage clip or band or sleeve pipe or addendum cone.
Further, described monitoring terminal comprises primary processor, electromagnetic field inducing unit, current/voltage monitoring means, positional information collecting unit, clock unit, power supply unit, data storage cell, local communication unit, status display unit, the output of described electromagnetic field inducing unit is connected with the input of described current/voltage monitoring means, the output of described current/voltage monitoring means is connected with the input of described primary processor, the output of described primary processor is connected with the input of described status display unit, the output of described positional information collecting unit is connected with the input of described clock unit, described primary processor respectively with described positional information collecting unit, described clock unit, described power supply unit, described data storage cell, described local communication unit is connected.
Further, described position signal acquisition unit is position transducer or magnetic moment transducer or obliquity sensor.
Further, described electric current and voltage monitoring means comprises electromagnetic field inducing element, detection judgement analog module, primary processor, the output of described electromagnetic field inducing element is connected with the input of described detection judgement analog module, and the described detection judgement output of analog module and the input of described primary processor are connected.
Further, described communication terminal comprises primary processor, local communication unit, data interface unit, power supply unit, data storage cell, telecommunication unit, status display unit, the output of described primary processor is connected with the input of described status display unit, described primary processor and described local communication unit, described data interface unit, described power supply unit, described data storage cell, described telecommunication unit are connected.
Compared with prior art, the beneficial effect of technical scheme disclosed by the invention is:
1) monitoring terminal adopts the analog circuit monitoring power circuit electric current and the change in voltage that are arranged in current/voltage monitoring means, and automatically identifies fault current and corresponding change in voltage, carries out accident analysis and judgement thereby trigger primary processor.
2) monitoring terminal adopts position transducer, monitors the change in location of this terminal, thereby obtains in time the change in location of fuse fusion tube, judges deciliter state of fuse, obtains the electriferous state that stops of circuit.
3) adopt wireless or wired two-way communication mode, set up fuse on-line monitoring system, realize the Real-time Collection of fuse fault message, service data, status data, realize the intellectuality of fuse monitoring.
4) monitoring terminal is installed on fuse, without external power supply or other equipment, simple in structure, overall power is low, terminal installation is little, it is simple and convenient to install.
Accompanying drawing explanation
Fig. 1 is the structural representation block diagram of fuse on-line monitoring system of the present invention
Fig. 2 is the structural representation block diagram of monitoring terminal of the present invention
Fig. 3 is communication terminal structural representation block diagram of the present invention
Fig. 4 is the schematic block diagram of current/voltage monitoring unit of the present invention
Fig. 5 is current/voltage monitoring means fault judgement schematic block diagram
Fig. 6 is wire voltage to earth variation monitoring schematic block diagram
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is elaborated.
Specific embodiment 1
As shown in Figure 1, a kind of fuse on-line monitoring system, comprises multiple fuse groups, multiple monitoring terminal group, multiple communication terminal and system main website, and fuse group is connected with monitoring terminal group, monitoring terminal group is connected with communication terminal, and communication terminal is connected with system main website.
Fuse group comprises A phase fuse, B phase fuse and C phase fuse, monitoring terminal group comprises A phase monitoring terminal, B phase monitoring terminal and C phase monitoring terminal, A phase monitoring terminal adopts the mode of stage clip affixed with A phase fuse, B phase monitoring terminal adopts the mode of stage clip affixed with B phase fuse, C phase monitoring terminal adopts the mode of stage clip affixed with C phase fuse, and A phase monitoring terminal, B phase monitoring terminal, C phase monitoring terminal are connected with communication terminal respectively.
Fuse on-line system is mainly used in fuse deciliter state in the distribution line in electric power system and the monitoring of position, line fault monitoring, and load current, fault current and fusion tube temperature survey, wherein:
1) monitoring terminal group: A phase monitoring terminal, B phase monitoring terminal, C phase monitoring terminal form a group, measure respectively same group of fuse A phase, B phase and the electric current of C phase and the variation of voltage signal, thereby measurement circuitry load current, fault current, Monitoring Line fault; Thereby the fusion tube position of integrated position sensor monitoring fuse judges fuse deciliter state; Send the data such as current data, fault type, fuse deciliter state to local communication terminal by short-distance wireless communication or optical fiber communication.
2) communication terminal: receive the data such as the current data, fault message, fuse deciliter state of local monitoring terminal, by telecommunication mode teletransmissions such as GPRS/3G radio communication, optical fiber communications to system main website.
3) system main website: receive and process the various data uploaded of communication terminal, realizing the function such as real time on-line monitoring, historical data statistical query and equipment state overhauling of the running status of circuit and fuse.
As shown in Figure 2, monitoring terminal comprises primary processor, electromagnetic field inducing unit, current/voltage monitoring means, positional information collecting unit, clock unit, power supply unit, data storage cell, local communication unit, status display unit, the output of electromagnetic field inducing unit is connected with the input of current/voltage monitoring means, the output of current/voltage monitoring means is connected with the input of primary processor, the output of primary processor is connected with the input of status display unit, the output of positional information collecting unit is connected with the input of clock unit, primary processor respectively with positional information collecting unit, clock unit, power supply unit, data storage cell, local communication unit is connected.Wherein:
1) primary processor: be mainly mainly single-chip microcomputer, as ARM, Freescale, Infeneon etc.The parameter such as the variation of fuse voltage to earth, fault current of monitoring based on current and voltage signals collecting unit, carries out ground connection, short circuit or the lightning fault of circuit and judges; Based on clock unit, event and data time are carried out to mark; By local communication unit, send the information such as fault type, measurement data, fuse position and deciliter state to communication terminal with wireless or optical fiber mode; State of a control display unit, adopts LED lamp or color display window to carry out faulty indication on the spot.
2) electromagnetic field inducing unit: utilize permeability magnetic material induction fuse high-voltage electromagnetic field around, obtain induced current; Utilize the electrical potential difference of fuse voltage to earth and air dielectric, obtain wire atmospherical discharges electric current.
3) current/voltage monitoring means: formed by the analog circuit such as filtering, amplification and sampling coded digital circuit.Based on induced current, calculate the flow through alternating current component of fuse and the size of DC component; By large current break decision circuit, whether the curent change of automatic monitoring flow measurement in the time that short circuit, the thunder and lightning of fuse dodge exceedes fault threshold; By little current dc component decision circuit, whether transient state capacitance current when automatic monitoring grounding exceedes fault threshold; By measure traverse line and the fuse measurement of discharging current over the ground, calculate line-to-earth voltage variable quantity.
4) positional information collecting unit: be a position transducer, can obtain the change in location and the positional information that are fixed on the monitoring terminal on fuse fusion tube.
5) clock unit: can obtaining communication terminal to time instruction, for master chip provide accurately to time, guarantee that the data and system that monitoring terminal gathered and uploaded is synchronous.
6) power supply unit: adopt the modes such as induction power taking, solar energy power taking, backup battery to obtain electric energy, and provide power supply for each functional unit.
7) data storage cell: the related data that storage monitors, while interruption as local communication, can support breakpoint transmission or repeating transmission.
8) local communication unit: can support the mode such as short-distance wireless communication, optical fiber communication, for malfunction monitoring terminal provides data communication channel.
9) status display unit: there is LED lamp or color display window, can acceptor's chip controls show corresponding malfunction.
As shown in Figure 3, communication terminal comprises primary processor, local communication unit, data interface unit, power supply unit, data storage cell, telecommunication unit, status display unit, the output of primary processor is connected with the input of status display unit, primary processor and local communication unit, data interface unit, power supply unit, data storage cell, telecommunication unit are connected.Wherein:
1) primary processor: by local communication unit, receive fault message, measurement data, fuse action and deciliter state etc. that monitoring terminal is uploaded; By telecommunication unit, by data remote to system main website; State of a control display unit, the operating state of display communication terminal.
2) local communication unit: can support the mode such as short-distance wireless communication, optical fiber communication, set up the data communication channel between communication terminal and monitoring terminal.
3) data communication interface unit: there is the interface such as Ethernet, RS232/485, the functions such as local maintenance, external device data access and the local data output of support equipment.
4) power supply unit: adopt the modes such as solar energy power taking, battery or outside civil power to obtain electric energy, and provide power supply for each functional unit.
5) data storage cell: the various data that storage receives from monitoring terminal, while interruption as telecommunication, can support breakpoint transmission or repeating transmission.
6) telecommunication unit: can support the modes such as note, GPRS, 3G, optical fiber communication, realize the two-way communication between system main website.
Fig. 4 is the schematic block diagram of current/voltage monitoring unit, it comprises electromagnetic field inducing element, detection judgement analog module, primary processor, the output of electromagnetic field inducing element is connected with the input of detection judgement analog module, and the detection judgement output of analog module and the input of primary processor are connected.Wherein the principle of detection judgement analog module as shown in Figure 5.
Fig. 5 is current/voltage monitoring means fault judgement principle schematic.Wherein:
1) signal amplification circuit: amplify by linear amplifier changing by wire electromagnetic field around the induced current obtaining, and separate two-way employing distinct methods and adjudicate.
2) direct current detecting circuit: by Waveform Matching circuit, obtain the transient state capacitance current signal component in shunt 1, filtering power frequency, high frequency and other signal component.
3) DC component decision circuit: whether by switching circuit, the transient current current signal component obtaining is carried out to amplitude comparison, adjudicating this signal is fault current signal.
4) exchange detecting circuit: by Waveform Matching circuit, obtain power frequency component component and high frequency component signal in shunt 2.
5) the large current amplitude decision circuit of power frequency component: whether by switching circuit, the power frequency component component obtaining is carried out to the amplitude rate of exchange, adjudicating this signal is fault current signal.
6) the large current amplitude decision circuit of high-frequency signal: whether by switching circuit, the high frequency component signal obtaining is carried out to the amplitude rate of exchange, adjudicating this signal is fault current signal.
Fig. 6 is voltage to earth measure of the change circuit.High-voltage conducting wires is connected with condenser network, and condenser network territory discharge current measuring circuit is connected, and discharge current measuring circuit is connected with average sample circuit.Wherein:
1) condenser network: the air dielectric of wire between over the ground, in the situation that wire and the earth exist voltage, exists faint discharging current, utilizes condenser network to transfer alternation weak current to capacitor discharge electric current, is convenient to measure.
2) discharge current measuring circuit: measure capacitance current size by high-precision current measuring circuit.
3) average sample circuit: obtain the capacitance current average amplitude in setting cycle, in the time that average amplitude variation exceedes setting thresholding, pass through surveyed capacitance current average amplitude variable quantity by primary processor, calculate wire voltage to earth variable quantity, as fault judgement according to one of.
Finally, above announcement is only specific embodiments of the invention.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Specific embodiment 2
Roughly the same with specific embodiment 1, difference is only:
1, fuse group comprises A phase fuse, B phase fuse and C phase fuse, monitoring terminal group comprises A phase monitoring terminal, B phase monitoring terminal and C phase monitoring terminal, A phase monitoring terminal adopts the mode of band affixed with A phase fuse, B phase monitoring terminal adopts the mode of band affixed with B phase fuse, C phase monitoring terminal adopts the mode of band affixed with C phase fuse, and A phase monitoring terminal, B phase monitoring terminal, C phase monitoring terminal are connected with communication terminal respectively.
2, the position signal acquisition unit in monitoring terminal is a magnetic moment transducer
Specific embodiment 3
Roughly the same with specific embodiment 1, difference is only:
1, fuse group comprises A phase fuse, B phase fuse and C phase fuse, monitoring terminal group comprises A phase monitoring terminal, B phase monitoring terminal and C phase monitoring terminal, A phase monitoring terminal adopts the mode of sleeve pipe affixed with A phase fuse, B phase monitoring terminal adopts the mode of sleeve pipe affixed with B phase fuse, C phase monitoring terminal adopts the mode of sleeve pipe affixed with C phase fuse, and A phase monitoring terminal, B phase monitoring terminal, C phase monitoring terminal are connected with communication terminal respectively.
2, the position signal acquisition unit in monitoring terminal is obliquity sensor.
Specific embodiment 4
Roughly the same with specific embodiment 1, difference is only:
Fuse group comprises A phase fuse, B phase fuse and C phase fuse, monitoring terminal group comprises A phase monitoring terminal, B phase monitoring terminal and C phase monitoring terminal, A phase monitoring terminal adopts the mode of addendum cone affixed with A phase fuse, B phase monitoring terminal adopts the mode of addendum cone affixed with B phase fuse, C phase monitoring terminal adopts the mode of addendum cone affixed with C phase fuse, and A phase monitoring terminal, B phase monitoring terminal, C phase monitoring terminal are connected with communication terminal respectively.

Claims (7)

1. a fuse on-line monitoring system, it is characterized in that, comprise at least one fuse group, at least one monitoring terminal group, at least one communication terminal and system main website, described fuse group is connected with described monitoring terminal group, described monitoring terminal group is connected with described communication terminal, and described communication terminal is connected with described system main website.
2. fuse on-line monitoring system as claimed in claim 1, it is characterized in that, described fuse group comprises A phase fuse, B phase fuse and C phase fuse, described monitoring terminal group comprises A phase monitoring terminal, B phase monitoring terminal and C phase monitoring terminal, described A phase monitoring terminal is affixed with described A phase fuse, described B phase monitoring terminal is affixed with described B phase fuse, described C phase monitoring terminal is affixed with described C phase fuse, and described A phase monitoring terminal, described B phase monitoring terminal, described C phase monitoring terminal are connected with described communication terminal respectively.
3. fuse on-line monitoring system as claimed in claim 1, it is characterized in that, described A phase monitoring terminal, described B phase monitoring terminal, described C phase monitoring terminal are affixed with the fusion tube of the fusion tube of the fusion tube of described A phase fuse, described B phase fuse, described C phase fuse respectively by the mode of stage clip or band or sleeve pipe or addendum cone.
4. fuse on-line monitoring system as claimed in claim 1, it is characterized in that, described monitoring terminal comprises primary processor, electromagnetic field inducing unit, current/voltage monitoring means, positional information collecting unit, clock unit, power supply unit, data storage cell, local communication unit, status display unit, the output of described electromagnetic field inducing unit is connected with the input of described current/voltage monitoring means, the output of described current/voltage monitoring means is connected with the input of described primary processor, the output of described primary processor is connected with the input of described status display unit, the output of described positional information collecting unit is connected with the input of described clock unit, described primary processor respectively with described positional information collecting unit, described clock unit, described power supply unit, described data storage cell, described local communication unit is connected.
5. fuse on-line monitoring system as claimed in claim 4, is characterized in that, described position signal acquisition unit is position transducer or magnetic moment transducer or obliquity sensor.
6. fuse on-line monitoring system as claimed in claim 4, it is characterized in that, described electric current and voltage monitoring means comprises electromagnetic field inducing element, detection judgement analog module and primary processor, the output of described electromagnetic field inducing element is connected with the input of described detection judgement analog module, and the described detection judgement output of analog module and the input of described primary processor are connected.
7. fuse on-line monitoring system as claimed in claim 1, it is characterized in that, described communication terminal comprises primary processor, local communication unit, data interface unit, power supply unit, data storage cell, telecommunication unit, status display unit, the output of described primary processor is connected with the input of described status display unit, described primary processor and described local communication unit, described data interface unit, described power supply unit, described data storage cell, described telecommunication unit are connected.
CN201410156236.4A 2014-04-17 2014-04-17 A kind of fuse on-line monitoring system Ceased CN103887888B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764994A (en) * 2015-03-25 2015-07-08 国家电网公司 Fuse on-line monitoring system
CN105119150A (en) * 2015-08-26 2015-12-02 芜湖市凯鑫避雷器有限责任公司 Fuse type isolation switch cabinet
CN105914113A (en) * 2016-06-07 2016-08-31 国网浙江兰溪市供电公司 Fuse monitoring system based on position sensor
CN105911423A (en) * 2016-06-06 2016-08-31 滁州康能电气有限公司 Jet-type fusing online monitoring device
CN106019075A (en) * 2016-07-01 2016-10-12 山东百川电气科技有限公司 Intelligent fuse test system
CN106067696A (en) * 2016-07-06 2016-11-02 苏州华安普电力科技股份有限公司 A kind of Unmanned Transformer Place fuse safety-protection system backing up fuse more

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JPH0287948A (en) * 1988-09-26 1990-03-28 Hitachi Ltd Remote monitoring and control equipment
CN2891448Y (en) * 2006-03-17 2007-04-18 上海涌能电力科技发展有限公司 Fuse remote control system
CN102288908A (en) * 2011-07-22 2011-12-21 重庆大学 Fault monitoring device and fault judgment method for measurement potential transformer (PT) fuse
CN203519793U (en) * 2013-11-06 2014-04-02 国家电网公司 Non-contact remote monitoring system for PT fuses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0287948A (en) * 1988-09-26 1990-03-28 Hitachi Ltd Remote monitoring and control equipment
CN2891448Y (en) * 2006-03-17 2007-04-18 上海涌能电力科技发展有限公司 Fuse remote control system
CN102288908A (en) * 2011-07-22 2011-12-21 重庆大学 Fault monitoring device and fault judgment method for measurement potential transformer (PT) fuse
CN203519793U (en) * 2013-11-06 2014-04-02 国家电网公司 Non-contact remote monitoring system for PT fuses

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764994A (en) * 2015-03-25 2015-07-08 国家电网公司 Fuse on-line monitoring system
CN104764994B (en) * 2015-03-25 2017-11-07 国家电网公司 Fuse on-line monitoring system
CN105119150A (en) * 2015-08-26 2015-12-02 芜湖市凯鑫避雷器有限责任公司 Fuse type isolation switch cabinet
CN105911423A (en) * 2016-06-06 2016-08-31 滁州康能电气有限公司 Jet-type fusing online monitoring device
CN105914113A (en) * 2016-06-07 2016-08-31 国网浙江兰溪市供电公司 Fuse monitoring system based on position sensor
CN106019075A (en) * 2016-07-01 2016-10-12 山东百川电气科技有限公司 Intelligent fuse test system
CN106067696A (en) * 2016-07-06 2016-11-02 苏州华安普电力科技股份有限公司 A kind of Unmanned Transformer Place fuse safety-protection system backing up fuse more

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