CN107728004A - Fault-line selecting method and device based on zero-sequence current failure principle of transfer - Google Patents
Fault-line selecting method and device based on zero-sequence current failure principle of transfer Download PDFInfo
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- CN107728004A CN107728004A CN201710854970.1A CN201710854970A CN107728004A CN 107728004 A CN107728004 A CN 107728004A CN 201710854970 A CN201710854970 A CN 201710854970A CN 107728004 A CN107728004 A CN 107728004A
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- zero
- sequence current
- fault
- extinguishing arc
- control device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides fault-line selecting method and device based on zero-sequence current failure principle of transfer; it is related to electrical equipment technical field; including extinguishing arc selector control device, Quick eddy driving switch, anti-interference type high-precision power, zero sequence current mutual inductor; the tunnels of zero sequence current mutual inductor series connection Quick eddy driving switch Hou Fen tetra-; it is grounded all the way after electric capacity, electrification display; all the way ground is followed by through overvoltage protection device; it is grounded all the way after high-tension fuse, voltage transformer, a resonance eliminator, is connected to isolation switch all the way；The invention provides the fault-line selecting method and device based on zero-sequence current failure principle of transfer, the present invention is not influenceed by grounding resistance size, short dot apart from factors such as length, route selection is rapid, can quickly select faulty line after earth fault generation, reliable and stable, precision is high.
Description
Technical field
The present invention relates to electrical equipment technical field, and in particular to the failure line selection based on zero-sequence current failure principle of transfer
Method and device.
Background technology
National low voltage electric network largely uses central point isolated neutral system at present, and this mode power network allows band single-phase earthing
Failure operation 2 hours, there is higher reliability.But with the popularization and development of city cable circuit, singlephase earth fault
Electric arc develops into line to line fault, is unable to maintain that 2h is run to the long-term damage of cable solid insulation.After singlephase earth fault, soon
It is necessary that speed selects faulty line.
Although selection method is a lot, but can not ensure the accuracy rate of route selection, shifted using based on zero-sequence current failure
Fore-and-aft direction change principle failure line selection technology coordinates Quick eddy driving switch, utilizes turn of electric current before and after singlephase earth fault
Move and change quickly selects faulty line.
The content of the invention
In view of the shortcomings of the prior art, the invention provides the fault-line selecting method based on zero-sequence current failure principle of transfer
And device so that reliable and stable, precision is high.
To realize object above, the present invention is achieved by the following technical programs：Shifted based on zero-sequence current failure former
The fault line selection device of reason, including extinguishing arc selector control device, Quick eddy driving switch, anti-interference type high-precision power, zero sequence
Current transformer, the tunnels of zero sequence current mutual inductor series connection Quick eddy driving switch Hou Fen tetra-, all the way through electric capacity, powered display
It is grounded after device, is followed by ground through overvoltage protection device all the way, is followed by all the way through high-tension fuse, voltage transformer, a resonance eliminator
Ground, isolation switch is connected to all the way.
Preferably, the extinguishing arc selector control device is connected to Quick eddy driving switch, the choosing of described extinguishing arc by optical fiber
Lane controller includes extinguishing arc module and fast line selection module, and the extinguishing arc module quickly extinguishes electric arc and is used to quickly select failure
Phase.
Preferably, the fault-line selecting method based on zero-sequence current failure principle of transfer, the fault-line selecting method
Comprise the following steps：
S1. during normal operation, extinguishing arc selector control device is in real time by voltage transformer monitoring system voltage, and calculate in real time
Go out the virtual value of residual voltage, realize the collection to residual voltage；
S2. single-phase earthing occurs, the Judging fault phase in 3ms of extinguishing arc selector control device 1, is turned by failure phase zero-sequence current
The maximum principle of variable quantity selects faulty line before and after shifting, receives extinguishing arc selector control device and sends separating brake order；
S3. anti-interference high-precision power is by receiving the order of extinguishing arc selector control device, control separating brake, combined floodgate controllable silicon
Conducting, the divide-shut brake coil discharge to Quick eddy driving switch is realized, complete the divide-shut brake action of Quick eddy driving switch；
S4. failure phase capacitance current is transferred in device, by zero sequence current mutual inductor to two before and after device action
Secondary 10ms's uses contrast, using the direction criterion and maximal increment method Judging fault circuit of uniqueness, completes failure line selection.
The invention provides the fault-line selecting method and device based on zero-sequence current failure principle of transfer, the present invention is not connect
Ground resistance size, short dot influence apart from factors such as length, and route selection is rapid, can quickly select fault wire after earth fault generation
Road, it is reliable and stable, precision is high.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the location design figure of the present invention；
Fig. 3 is the specific fault-line selecting method decision logic figure of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
, it is necessary to explanation in description of the invention, the orientation of instruction such as term " vertical ", " on ", " under ", " level " or
Person's position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of and describes this practicality and simplify to describe,
Rather than instruction either implies that signified device or element must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore be not considered as limiting the invention.In addition, " first ", " second ", " the 3rd ", " the 4th " are only used for describing mesh
, and it is not intended that instruction or hint relative importance.
In description of the invention, it is also necessary to explanation, unless otherwise clear and definite regulation and limitation, term " setting ", " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection, can be mechanical connection or electrical connection, can be directly connected to or be connected by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in the present invention.
Embodiment 1：
As shown in figure 1, the fault line selection device based on zero-sequence current failure principle of transfer, including extinguishing arc selector control device 1,
Quick eddy driving switch 2, anti-interference type high-precision power, zero sequence current mutual inductor 3, the zero sequence current mutual inductor 3 are connected
The tunnels of 2 Hou Fen of Quick eddy driving switch tetra-, are grounded after electric capacity, electrification display 5, all the way after overvoltage protection device 6 all the way
Ground connection, is grounded after 8, high-tension fuse 7, voltage transformer resonance eliminators 9, is connected to isolation switch 4 all the way all the way.
Preferably, the extinguishing arc selector control device 1 is connected to Quick eddy driving switch 2, described extinguishing arc by optical fiber
Selector control device 1 includes extinguishing arc module and fast line selection module, and the extinguishing arc module quickly extinguishes electric arc and is used to quickly select event
Hinder phase.
Preferably, the fault-line selecting method based on zero-sequence current failure principle of transfer, the fault-line selecting method
Comprise the following steps：
S1. during normal operation, extinguishing arc selector control device 1 is in real time by the monitoring system voltage of voltage transformer 8, and count in real time
The virtual value of residual voltage is calculated, realizes the collection to residual voltage；
S2. single-phase earthing occurs, the Judging fault phase in 3ms of extinguishing arc selector control device 1, is turned by failure phase zero-sequence current
The maximum principle of variable quantity selects faulty line before and after shifting, receives extinguishing arc selector control device and sends separating brake order；
S3. anti-interference high-precision power is by receiving the order of extinguishing arc selector control device 1, control separating brake, combined floodgate controllable silicon
Conducting, realize the divide-shut brake coil discharge to Quick eddy driving switch 2, complete the divide-shut brake of Quick eddy driving switch 2
Action；
S4. failure phase capacitance current is transferred in device, by zero sequence current mutual inductor 3 to two before and after device action
Secondary 10ms's uses contrast, using the direction criterion and maximal increment method Judging fault circuit of uniqueness, completes failure line selection.
Embodiment 2：
Driven based on the fault line selection device of zero-sequence current failure principle of transfer, including extinguishing arc selector control device 1, Quick eddy
Dynamic switch 2, anti-interference type high-precision power, zero sequence current mutual inductor 3, the series connection of zero sequence current mutual inductor 3 Quick eddy drive
Dynamic switch 2 Hou Fen tetra- tunnels, are grounded after electric capacity, electrification display 5, are grounded after overvoltage protection device 6, pass through all the way all the way all the way
It is grounded after 8, high-tension fuse 7, voltage transformer resonance eliminators 9, is connected to isolation switch 4 all the way.
Preferably, the extinguishing arc selector control device 1 is connected to Quick eddy driving switch 2, described extinguishing arc by optical fiber
Selector control device 1 includes extinguishing arc module and fast line selection module, and the extinguishing arc module quickly extinguishes electric arc and is used to quickly select event
Hinder phase.
Preferably, the fault-line selecting method based on zero-sequence current failure principle of transfer, the fault-line selecting method
Comprise the following steps：
S1. during normal operation, extinguishing arc selector control device 1 is in real time by the monitoring system voltage of voltage transformer 8, and count in real time
The virtual value of residual voltage is calculated, realizes the collection to residual voltage；
S2. single-phase earthing occurs, the Judging fault phase in 3ms of extinguishing arc selector control device 1, is turned by failure phase zero-sequence current
The maximum principle of variable quantity selects faulty line before and after shifting, receives extinguishing arc selector control device 1 and sends separating brake order；
S3. anti-interference high-precision power is by receiving the order of extinguishing arc selector control device 1, control separating brake, combined floodgate controllable silicon
Conducting, realize the divide-shut brake coil discharge to Quick eddy driving switch 2, complete the divide-shut brake of Quick eddy driving switch 2
Action；
S4. failure phase capacitance current is transferred in device, by zero sequence current mutual inductor 3 to two before and after device action
Secondary 10ms's uses contrast, using the direction criterion and maximal increment method Judging fault circuit of uniqueness, completes failure line selection.
As shown in Fig. 2 singlephase earth fault occurs for the 5th article of circuit, the change of the capacitance current of first circuit is substantially not
Become, i.e. Δ I1≈ 0, Article 2, Article 3, Article 4 are as first circuit, and capacitance current is basically unchanged, i.e. Δ I2≈ 0,
ΔI3≈ 0, Δ I4≈0.Because Article 5 circuit is faulty line, the capacitance current of other non-fault lines passes through faulty line
Zero sequence CT return to bus, therefore Δ I5=-(I1+I2+I3+I4).And the extinguishing arc choosing of the Quick eddy driving switch device in invention
Lane controller after failure judgement phase, sends rapidly the combined floodgate order of Quick eddy driving switch, directly failure connects in 3ms
Ground, overvoltage is near to 0, zero-sequence current is transferred to Δ I inside the present apparatusKX=-(I1+I2+I3+I4+I5)。
As shown in figure 3, the above-mentioned fault-line selecting method based on zero-sequence current failure principle of transfer, the specific method bag
Include following steps：
S1. when systems are functioning properly, residual voltage U is gathered0, and calculate within 3ms the virtual value of residual voltage；
S2. U is worked asΔ＜ setting values, continue collection and calculate, if UΔ>Setting value, starting current collector, gather for the first time
Electric current Ii0-1, and send the combined floodgate order of Quick eddy driving switch, rapid closing；
I is gathered again after S3.160msi0-2And electric current I in the present apparatusd, work as Id＞ setting values, selected using maximal increment method
Be out of order circuit, otherwise just using the circuit of second of maximum current gathered as faulty line.
The invention provides the fault-line selecting method and device based on zero-sequence current failure principle of transfer, the present invention is not connect
Ground resistance size, short dot influence apart from factors such as length, and route selection is rapid, can quickly select fault wire after earth fault generation
Road, it is reliable and stable, precision is high.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (3)
1. the fault line selection device based on zero-sequence current failure principle of transfer, it is characterised in that including extinguishing arc selector control device, soon
Speed vortex driving switch, anti-interference type high-precision power, zero sequence current mutual inductor, the zero sequence current mutual inductor series connection FAST VORTEX
The tunnels of driving switch Hou Fen tetra- are flowed, are grounded all the way after electric capacity, electrification display, are followed by ground through overvoltage protection device all the way, all the way
It is grounded after high-tension fuse, voltage transformer, a resonance eliminator, is connected to isolation switch all the way.
2. the fault line selection device as claimed in claim 1 based on zero-sequence current failure principle of transfer, it is characterised in that described
Extinguishing arc selector control device is connected to Quick eddy driving switch by optical fiber, and described extinguishing arc selector control device includes extinguishing arc module
With fast line selection module, the extinguishing arc module quickly extinguishes electric arc and is used to quickly select failure phase.
3. the fault-line selecting method as claimed in claim 1 based on zero-sequence current failure principle of transfer, it is characterised in that described
Fault-line selecting method comprises the following steps：
S1. during normal operation, extinguishing arc selector control device is in real time by voltage transformer monitoring system voltage, and calculate zero in real time
The virtual value of sequence voltage, realize the collection to residual voltage；
S2. single-phase earthing, extinguishing arc selector control device Judging fault phase in 3ms, before being shifted by failure phase zero-sequence current occurs
The maximum principle of variable quantity selects faulty line afterwards, receives extinguishing arc selector control device and sends separating brake order；
S3. anti-interference high-precision power is by receiving the order of extinguishing arc selector control device, and control separating brake, combined floodgate controllable silicon are led
It is logical, the divide-shut brake coil discharge to Quick eddy driving switch is realized, completes the divide-shut brake action of Quick eddy driving switch；
S4. failure phase capacitance current is transferred in device, by zero sequence current mutual inductor to before and after device action twice
10ms's uses contrast, using the direction criterion and maximal increment method Judging fault circuit of uniqueness, completes failure line selection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710854970.1A CN107728004A (en) | 2017-09-20 | 2017-09-20 | Fault-line selecting method and device based on zero-sequence current failure principle of transfer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710854970.1A CN107728004A (en) | 2017-09-20 | 2017-09-20 | Fault-line selecting method and device based on zero-sequence current failure principle of transfer |
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| CN107728004A true CN107728004A (en) | 2018-02-23 |
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| CN201710854970.1A Pending CN107728004A (en) | 2017-09-20 | 2017-09-20 | Fault-line selecting method and device based on zero-sequence current failure principle of transfer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108448561A (en) * | 2018-02-24 | 2018-08-24 | 上海合凯电气科技有限公司 | It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices |
| CN109239530A (en) * | 2018-10-11 | 2019-01-18 | 国网山东省电力公司东营供电公司 | A kind of intermediate distribution system fault-line selecting method, processor and device |
| CN109245302A (en) * | 2018-09-30 | 2019-01-18 | 安徽合凯电气科技股份有限公司 | A kind of switching regulator arc-extinction device control system jamproof system |
| CN110535116A (en) * | 2019-09-10 | 2019-12-03 | 北京华电瑞通电力工程技术有限公司 | A kind of arc extinction cabinet and small current neutral grounding system |
| CN114217172A (en) * | 2021-12-16 | 2022-03-22 | 国网湖北省电力有限公司孝感供电公司 | Power distribution network single-phase earth fault area judgment method based on node identification |
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| CN101707369A (en) * | 2009-03-17 | 2010-05-12 | 郭道胜 | Arc and resonance elimination comprehensive device for power grid |
| CN102623985A (en) * | 2012-01-17 | 2012-08-01 | 合肥凯高电气设备有限公司 | Novel comprehensive grounding protection and route selection device for medium-voltage power distribution system |
| CN106646112A (en) * | 2016-11-16 | 2017-05-10 | 安徽合凯电气科技股份有限公司 | Fast switching arc and harmonic elimination-based single-phase grounding fault line selection and location method |
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2017
- 2017-09-20 CN CN201710854970.1A patent/CN107728004A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707369A (en) * | 2009-03-17 | 2010-05-12 | 郭道胜 | Arc and resonance elimination comprehensive device for power grid |
| CN102623985A (en) * | 2012-01-17 | 2012-08-01 | 合肥凯高电气设备有限公司 | Novel comprehensive grounding protection and route selection device for medium-voltage power distribution system |
| CN106646112A (en) * | 2016-11-16 | 2017-05-10 | 安徽合凯电气科技股份有限公司 | Fast switching arc and harmonic elimination-based single-phase grounding fault line selection and location method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448561A (en) * | 2018-02-24 | 2018-08-24 | 上海合凯电气科技有限公司 | It is a kind of to prevent two differently short-circuit high-speed switch arc-extinction devices |
| CN109245302A (en) * | 2018-09-30 | 2019-01-18 | 安徽合凯电气科技股份有限公司 | A kind of switching regulator arc-extinction device control system jamproof system |
| CN109239530A (en) * | 2018-10-11 | 2019-01-18 | 国网山东省电力公司东营供电公司 | A kind of intermediate distribution system fault-line selecting method, processor and device |
| CN110535116A (en) * | 2019-09-10 | 2019-12-03 | 北京华电瑞通电力工程技术有限公司 | A kind of arc extinction cabinet and small current neutral grounding system |
| CN114217172A (en) * | 2021-12-16 | 2022-03-22 | 国网湖北省电力有限公司孝感供电公司 | Power distribution network single-phase earth fault area judgment method based on node identification |
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Application publication date: 20180223 |