CN104578011A - Cable line fault isolation method, device and system - Google Patents
Cable line fault isolation method, device and system Download PDFInfo
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- CN104578011A CN104578011A CN201510039813.6A CN201510039813A CN104578011A CN 104578011 A CN104578011 A CN 104578011A CN 201510039813 A CN201510039813 A CN 201510039813A CN 104578011 A CN104578011 A CN 104578011A
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- 238000002955 isolation Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims description 31
- 238000009826 distribution Methods 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention discloses a cable line fault isolation method, device and system. The method includes the steps of obtaining the zero-sequence current on the load side, judging whether the zero-sequence current exceeds a preset zero-sequence current value section or not, and controlling an intelligent dividing switch on the load side to be turned off if the zero-sequence current exceeds the preset zero-sequence current value section. According to the technical scheme, when the certain load side fails, only the intelligent dividing switch on the fault load side needs to be turned off, a circuit switch does not need to be turned off, and the power outrage area can be effectively narrowed.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to a kind of cable line fault partition method, device and system.
Background technology
Electric power is the energy using electric energy as power.Electric power is invented in 19 century 70s, and the invention of electric power and application have started second time industrialization climax, and since becoming for 18th century, one of three scientific and technological revolutions that the world occurs, from then on science and technology changes the life of people more rapidly.The large-scale electrical power system that 20th century occurred is one of most important achievement in the human engineering history of science, the electrical production be made up of links such as generating, transmission of electricity, power transformation, distribution and electricity consumptions and consume system, natural primary energy is changed into electric power by mechanical energy device by it, then supplies power to each user through transmission of electricity, power transformation and distribution.Be the epoch of the Internet now, but let us still have the demand of sustainable growth to electric power, because we have invented the product of more use electric power such as computer, household electrical appliances.Undeniable, constantly the occurring of new technology makes electric power become the necessity of people.
Along with distribution line long transmission distance, branch line are many, natural environment and climate inclement condition, usually causing trouble rate is higher for the natural calamities such as outer broken, equipment fault and thunder and lightning.At present, 10kV distribution system generally adopts that neutral point of electric network is earth-free or through the small current neutral grounding mode of grounding through arc, adopt in this way, Small Electric Current Earthing And Routing Device lightly facilitates, be convenient to installment and debugging, and the accuracy of fault detect also increases.
But, in current technology, when there is single phase ground fault in power system load side, concrete fault point cannot be navigated to, can only distribution line be navigated to, therefore, once load side generation single phase ground fault, can only excise faulty line by the mode jumping out line switching, this circuit is all had a power failure, and influence area is larger.
Summary of the invention
In view of this, the invention provides a kind of cable line fault partition method, device and system, when concrete a certain load side breaks down, can only need the intelligent demarcation switch disconnecting the load side that breaks down, do not need line switching to disconnect, can power supply interrupted district be effectively reduced.
For achieving the above object, the invention provides following technical scheme:
A kind of cable line fault partition method, comprising:
Obtain the zero-sequence current of load side;
Judge whether described zero-sequence current exceeds default zero-sequence current value interval;
If so, the intelligent demarcation switch of control overhead side disconnects.
Preferably, before the zero-sequence current of described acquisition load side, also comprise:
Control the described zero-sequence current of zero sequence current mutual inductor detection load side.
Preferably, also comprise:
Control communication module and send fault message to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch.
Preferably, described communication module is wireless communication module.
Preferably, also comprise:
Obtain the control command to described intelligent demarcation switch by described communication module, described control command comprises the described intelligent demarcation switch of control and closes.
A kind of cable line fault spacer assembly, comprising:
First acquiring unit, for obtaining the zero-sequence current of load side;
Judging unit, interval for judging whether described zero-sequence current exceeds default zero-sequence current value;
First control unit, during for exceeding default zero-sequence current value interval when described zero-sequence current, the intelligent demarcation switch of control overhead side disconnects.
Preferably, also comprise:
Second control unit, for controlling the zero-sequence current of zero sequence current mutual inductor detection load side.
Preferably, also comprise:
3rd control unit, send fault message for controlling communication module to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch;
Second acquisition unit, for being obtained the control command to described intelligent demarcation switch by described communication module, described control command comprises the described intelligent demarcation switch of control and closes.
A kind of cable line fault shielding system, comprising:
Intelligent demarcation switch controller; Be connected with described intelligent demarcation switch controller, be arranged at the zero sequence current mutual inductor of described intelligent demarcation switch controller inside; And the intelligent demarcation switch to be connected with described intelligent demarcation switch controller;
The control operation of described intelligent demarcation switch controller comprises, and obtains the zero-sequence current of load side, judges whether described zero-sequence current exceeds default zero-sequence current value interval, and if so, the described intelligent demarcation switch of control overhead side disconnects;
Described zero sequence current mutual inductor is used for, the zero-sequence current of detection load side.
Preferably, also comprise:
The communication module be connected with described intelligent demarcation switch controller, for sending fault message to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch, and the control command obtained described intelligent demarcation switch, described control command comprises the described intelligent demarcation switch of control and closes.
Known via above-mentioned technical scheme, compared with prior art, the invention provides a kind of cable line fault partition method, device and system.Adopt technical scheme provided by the invention, first obtain the zero-sequence current of load side; Judge whether described zero-sequence current exceeds default zero-sequence current value interval; If so, load side generation single phase ground fault is described, now the intelligent demarcation switch of control overhead side disconnects, and described intelligent demarcation switch is positioned at load side, and the intelligent demarcation switch disconnecting certain load side only can make this load side user power utilization region power-off.Therefore, technical scheme provided by the invention, during load side generation single phase ground fault, can accurate fault point, namely concrete a certain load side breaks down, relative to prior art location further accurately, only need the intelligent demarcation switch disconnecting the load side that breaks down, do not need line switching to disconnect, therefore, it is possible to make other fault-free load side normal power supplies of this circuit, namely effectively reduce power supply interrupted district.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The flow chart of a kind of cable line fault partition method that Fig. 1 provides for the embodiment of the present invention;
The flow chart of another cable line fault partition method that Fig. 2 provides for the embodiment of the present invention;
The structure chart of a kind of cable line fault spacer assembly that Fig. 3 provides for the embodiment of the present invention;
The structure chart of a kind of cable line fault shielding system that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment one
Refer to Fig. 1, the flow chart of a kind of cable line fault partition method that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the method comprises:
Step S101, obtains the zero-sequence current of load side;
Concrete, the zero-sequence current of load side is obtained by zero sequence current mutual inductor.
Further, before described acquisition zero-sequence current, also comprise:
Control the zero-sequence current of zero sequence current mutual inductor detection load side.
Step S102, judges whether described zero-sequence current exceeds default zero-sequence current value interval;
Concrete, described default zero-sequence current value is interval optional, is (i1 ~ i2), and wherein, i1 is the interval minimum value of described default zero-sequence current value, and i2 is the interval maximum of described default zero-sequence current value.Performing described step S102 is or no judged result, if the determination result is YES, performs step S103; If judged result is no, described intelligent demarcation switch maintains closed condition, returns described step S101.
Step S103, the intelligent demarcation switch of control overhead side disconnects;
Concrete, when described zero-sequence current exceeds default zero-sequence current value interval, illustrate that this load side there occurs single phase ground fault, the intelligent demarcation switch now controlling this load side disconnects, and cuts off supply of electric power to prevent the generation of security incident.
The technical scheme adopting the embodiment of the present invention one to provide, first obtains the zero-sequence current of load side; Judge whether described zero-sequence current exceeds default zero-sequence current value interval; If so, load side generation single phase ground fault is described, now the intelligent demarcation switch of control overhead side disconnects, and described intelligent demarcation switch is positioned at load side, and the intelligent demarcation switch disconnecting certain load side only can make this load side user power utilization region power-off.Therefore, technical scheme provided by the invention, during load side generation single phase ground fault, can accurate fault point, namely concrete a certain load side breaks down, relative to prior art location further accurately, only need the intelligent demarcation switch disconnecting the load side that breaks down, do not need line switching to disconnect, therefore, it is possible to make other fault-free load side normal power supplies of this circuit, namely effectively reduce power supply interrupted district.
In addition, in existing technology, the intelligent demarcation switch of control overhead side disconnects, after implementing Fault Isolation, maintainer generally passive receive the feedback of fault load side user after just know and there occurs fault, then just can go maintenance, efficiency is very low.In order to address this problem, the invention also discloses specific embodiment two.
Embodiment two
Refer to Fig. 2, the flow chart of another cable line fault partition method that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the method comprises:
Step S201, obtains the zero-sequence current of load side;
Step S202, judges whether described zero-sequence current exceeds default zero-sequence current value interval;
Concrete, if so, perform described step S203, S204 and S205 successively; If not, described step S201 is returned;
Step S203, the intelligent demarcation switch of control overhead side disconnects;
Step S204, controls communication module and sends fault message to default mobile terminal and power distribution network server;
Concrete, described fault message comprises positional information and the state information of described intelligent demarcation switch; The positional information of described intelligent demarcation switch can characterize the particular location of the load side that single phase ground fault occurs, and described state information comprises off-state or the closure state information of described intelligent demarcation switch.
Concrete, described communication module is wireless communication module, and described communication module sends fault message by wireless network to default mobile terminal and power distribution network server.
Further, described wireless communication module, be applicable to the cordless communication network of current main flow, such as GPRS (General Packet Radio Service, general packet radio service technology) network, CDMA (Code Division Multiple Access, code division multiple access) network, WCDMA (Wideband CodeDivision Multiple Access, Wideband Code Division Multiple Access (WCDMA)) network, TD-LTE (Time Division LongTerm Evolution, timesharing Long Term Evolution) network etc.
Step S205, obtains the control command to described intelligent demarcation switch by described communication module;
Concrete, described control command comprises the described intelligent demarcation switch of control and closes.
Step S206, responds described control command, controls described intelligent demarcation switch and closes.
Visible, technical scheme provided by the invention, except at the scene artificial to equipment implement closed except, can also by described communication module Remote Acquisitioning close command, described close command is for described intelligent demarcation switch.Described communication module is wireless communication module.That is, maintainer passes through mobile terminal device (such as, mobile phone) through cordless communication network sending controling instruction to wireless communication module.
Concrete, respond described close command, control described intelligent demarcation switch closed after, then can recover the supply of electric power of fault load side user.
The technical scheme that the embodiment of the present invention two provides, fault load side is being performed to the very first time of Fault Isolation, maintainer can receive the fault message that communication module sends, thus fault message can be known in time, the quick reaction capability of maintainer for fault can be improved to a great extent.
By the technical scheme that the embodiment of the present invention two provides, can realize the long-range control to intelligent demarcation switch, after maintainer fixes a breakdown, the intelligent demarcation switch scene need not arriving disconnection just can control intelligent demarcation switch and close, and can increase work efficiency.
In order to more comprehensively set forth technical scheme provided by the invention, the present invention also discloses a kind of cable line fault spacer assembly.
Refer to Fig. 3, the structure chart of a kind of cable line fault spacer assembly that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, this device comprises:
First acquiring unit 301, for obtaining the zero-sequence current of load side;
Judging unit 302, interval for judging whether described zero-sequence current exceeds default zero-sequence current value;
First control unit 303, during for exceeding default zero-sequence current value interval when described zero-sequence current, the intelligent demarcation switch of control overhead side disconnects.
Further, the cable line fault spacer assembly that the embodiment of the present invention provides, also comprises:
Second control unit, for controlling the zero-sequence current of zero sequence current mutual inductor detection load side.
3rd control unit, send fault message for controlling communication module to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch;
Second acquisition unit, for being obtained the control command to described intelligent demarcation switch by described communication module, described control command comprises the described intelligent demarcation switch of control and closes.
4th control unit, for responding described control command, controlling described intelligent demarcation switch and closing.
Further, the present invention also discloses a kind of cable line fault shielding system.
Refer to Fig. 4, the structure chart of a kind of cable line fault shielding system that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, this system comprises:
Intelligent demarcation switch controller 401; Be connected with described intelligent demarcation switch controller 401, be arranged at the zero sequence current mutual inductor 4011 of described intelligent demarcation switch controller 401 inside; And the intelligent demarcation switch 402 to be connected with described intelligent demarcation switch controller 401;
The control operation of described intelligent demarcation switch controller 401 comprises, and obtains the zero-sequence current of load side, and judge whether described zero-sequence current exceeds default zero-sequence current value interval, if so, the described intelligent demarcation switch 402 of control overhead side disconnects;
Described zero sequence current mutual inductor 4011 is for, the zero-sequence current of detection load side.
Concrete, described intelligent demarcation switch controller 401 obtains the zero-sequence current of load side by described zero sequence current mutual inductor 4011.
Further, the cable line fault shielding system that the embodiment of the present invention provides also comprises:
The communication module be connected with described intelligent demarcation switch controller 401, for sending fault message to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch 402, and the control command obtained described intelligent demarcation switch 402, described control command comprises the described intelligent demarcation switch 402 of control and closes; Then the control operation of described intelligent demarcation switch controller 401 also comprises: obtain the control command to described intelligent demarcation switch 402 by described communication module, respond described control command, controls described intelligent demarcation switch 402 and closes.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment and system, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a cable line fault partition method, is characterized in that, comprising:
Obtain the zero-sequence current of load side;
Judge whether described zero-sequence current exceeds default zero-sequence current value interval;
If so, the intelligent demarcation switch of control overhead side disconnects.
2. method according to claim 1, is characterized in that, before the zero-sequence current of described acquisition load side, also comprises:
Control the described zero-sequence current of zero sequence current mutual inductor detection load side.
3. method according to claim 1, is characterized in that, also comprises:
Control communication module and send fault message to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch.
4. method according to claim 3, is characterized in that, described communication module is wireless communication module.
5. method according to claim 3, is characterized in that, also comprises:
Obtain the control command to described intelligent demarcation switch by described communication module, described control command comprises the described intelligent demarcation switch of control and closes.
6. a cable line fault spacer assembly, is characterized in that, comprising:
First acquiring unit, for obtaining the zero-sequence current of load side;
Judging unit, interval for judging whether described zero-sequence current exceeds default zero-sequence current value;
First control unit, during for exceeding default zero-sequence current value interval when described zero-sequence current, the intelligent demarcation switch of control overhead side disconnects.
7. device according to claim 6, is characterized in that, also comprises:
Second control unit, for controlling the zero-sequence current of zero sequence current mutual inductor detection load side.
8. device according to claim 6, is characterized in that, also comprises:
3rd control unit, send fault message for controlling communication module to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch;
Second acquisition unit, for being obtained the control command to described intelligent demarcation switch by described communication module, described control command comprises the described intelligent demarcation switch of control and closes.
9. a cable line fault shielding system, is characterized in that, comprising:
Intelligent demarcation switch controller; Be connected with described intelligent demarcation switch controller, be arranged at the zero sequence current mutual inductor of described intelligent demarcation switch controller inside; And the intelligent demarcation switch to be connected with described intelligent demarcation switch controller;
The control operation of described intelligent demarcation switch controller comprises, and obtains the zero-sequence current of load side, judges whether described zero-sequence current exceeds default zero-sequence current value interval, and if so, the described intelligent demarcation switch of control overhead side disconnects;
Described zero sequence current mutual inductor is used for, the zero-sequence current of detection load side.
10. system according to claim 9, is characterized in that, also comprises:
The communication module be connected with described intelligent demarcation switch controller, for sending fault message to default mobile terminal and power distribution network server, described fault message comprises positional information and the state information of described intelligent demarcation switch, and the control command obtained described intelligent demarcation switch, described control command comprises the described intelligent demarcation switch of control and closes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510039813.6A CN104578011A (en) | 2015-01-27 | 2015-01-27 | Cable line fault isolation method, device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510039813.6A CN104578011A (en) | 2015-01-27 | 2015-01-27 | Cable line fault isolation method, device and system |
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| CN104578011A true CN104578011A (en) | 2015-04-29 |
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| CN201510039813.6A Pending CN104578011A (en) | 2015-01-27 | 2015-01-27 | Cable line fault isolation method, device and system |
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Cited By (1)
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| CN108009644A (en) * | 2016-10-29 | 2018-05-08 | 南京理工大学 | A kind of mobile monitoring system of 10KV demarcation switch |
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