CN105259479B - A kind of ground-fault detection arrangement - Google Patents
A kind of ground-fault detection arrangement Download PDFInfo
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- CN105259479B CN105259479B CN201510805795.8A CN201510805795A CN105259479B CN 105259479 B CN105259479 B CN 105259479B CN 201510805795 A CN201510805795 A CN 201510805795A CN 105259479 B CN105259479 B CN 105259479B
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Abstract
The invention discloses a kind of ground-fault detection arrangement, including signal generation apparatus, signal picker and signal to receive locator.The ground-fault detection arrangement of the present invention, detection signal is sent to faulty line by the setting can of signal generation apparatus, and detection signal is collected from faulty line by the setting can of signal picker, determine that point occurs for failure, and the setting of locator is received by signal, the positional information that can failure occurs point is sent, so can be to play the effect being accurately positioned to trouble point.
Description
Technical field
The present invention relates to a kind of power equipment, more particularly to a kind of ground-fault detection arrangement.
Background technology
In recent years, with the implementation of electric network reconstruction engineering, the change of 10kV distribution line power supply modes, distribution is enhanced
The dielectric level of circuit, the trip-out rate of distribution line is reduced, improves power supply reliability, reduces line loss.But take
New power supply mode is in actual motion, frequent generation singlephase earth fault, is particularly disliked in strong wind, heavy rain, hail, snow etc.
Under bad weather condition, earth fault frequently occurs, and has had a strong impact on safety, the economical operation of transformer and power distribution network.Failure
After generation, because line length scope is wide, using piecewise push-and-pull by rule of thumb, is segmented in the past, the conventional method such as shaft tower inspection is carried out step by step
Investigation, wastes time and energy, and power failure range is big, time length, it is difficult to quick and precisely find trouble point.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide one kind can quick and precisely find trouble point
Ground-fault detection arrangement.
To achieve the above object, the invention provides following technical scheme：A kind of ground-fault detection arrangement, including signal
Generating means, signal picker and signal receive locator, and the signal generation apparatus includes timing chip, and the chip, which has, to be put
Electric end and output end, the discharge end are coupled with rheostat, and described rheostatic one end is coupled to electricity after being coupled with the 7th resistance
Source, the other end are grounded after coupling the first electric capacity, and the timing chip also has low triggering end and high-triggering end and control voltage end,
The low triggering end and high-triggering end are coupled between rheostat and the first electric capacity, coupling between the low triggering end and discharge end
Diode is connected to, the control voltage end is grounded after being coupled with the second electric capacity, and the output end is coupled with light emitting diode and is followed by
Ground, the first operational amplifier being also coupled to, the in-phase input end of first operational amplifier and the output end of timing chip couple,
Inverting input is grounded after being coupled with second resistance, and the output end of first operational amplifier couples after being coupled with first resistor
In second resistance, and faulty line is further coupled to, the signal picker includes transformer, the second operational amplifier and the 3rd fortune
Amplifier is calculated, the transformer is hand-held transformer, and the secondary end of the transformer is same mutually defeated with the second operational amplifier
Enter end and inverting input coupling, the inverting input of second operational amplifier is grounded after being also coupled to the 4th resistance, institute
State the second operational amplifier output end be coupled with 3rd resistor after be coupled to the 4th resistance, coupled after being also coupled to the 5th resistance
In the inverting input of the 3rd operational amplifier, the inverting input of the 3rd operational amplifier is also coupled to parallel with one another
The output end of the operational amplifier, the in-phase input end of the 3rd operational amplifier are coupled to after 6th resistance and the 3rd electric capacity
Ground connection, output end are coupled with zigbee modules and receive locator communication with signal, and the signal, which receives locator, includes control
CPU, liquid crystal display, 4G modules, GPRS module and zigbee modules, the control CPU couple with signal picker, the 4G
With control CPU couplings, CPU is controlled when signal picker collects data and is input to for module, liquid crystal display, GPRS module
When interior, control CPU shows the data by liquid crystal display, and obtains location position data by GPRS module, then
Position data is sent by 4G modules.
As a further improvement on the present invention, the rheostat includes base and the rotating disk electrically connected with timing chip,
One end of the base offers swivelling chute, and the rotating disk is embedded into swivelling chute, along the circle of swivelling chute on the base
All edges are placed with several and are embedded in embedding hole for the resistance of different resistances, are offered on the cell wall of the swivelling chute with embedding hole one by one
Corresponding through hole, the circumferential edge of the rotating disk is provided with hemispherical contact, when resistance value is needed, rotating disk insertion
Into swivelling chute, hemispherical contact passes through one of the resistance electrical connection in through hole and embedding hole corresponding with the through hole, the rotation
Rotating disk is also coaxially fixed with column spinner backwards to one end of base, and the side of the column spinner is further opened with anti-slip veins.
The invention has the advantages that when line fault, pass through the setting of signal generation apparatus, it is possible to
Alien frequencies detection signal is injected into faulty line, the alien frequencies detection signal will circulate in faulty line, at this moment again using letter
Number collector detects alien frequencies detection signal along faulty line, at the same by the data detected be sent in real time signal receive it is fixed
Position device, signal receive locator and will show these data in real time, when certain point left and right sides is detected, one
There is this alien frequencies signal side, when opposite side does not have, it is determined that it is exactly fault ground point that this point, which is, and now signal receives locator just
The position data of the point can be detected, then send console, this makes it possible to promptly and accurately and effectively really
The trouble point on alignment road.
Brief description of the drawings
Fig. 1 is the circuit diagram of the signal generation apparatus of the present invention；
Fig. 2 is the circuit diagram of the signal picker of the present invention；
Fig. 3 is that the signal of the present invention receives the module map of locator；
Fig. 4 is rheostatic overall structure figure in Fig. 1.
Embodiment
Referring to figs. 1 to shown in 4, a kind of ground-fault detection arrangement of the present embodiment, including signal generation apparatus 1, signal
Collector 2 and signal receive locator 3, and the signal generation apparatus 1 includes timing chip U1, and the chip has discharge end and defeated
Go out end, the discharge end be coupled with rheostat RP, the rheostat RP one end be coupled with the 7th resistance R7 after be coupled to power supply,
The other end is grounded after coupling the first electric capacity C1, and timing chip U1 also has low triggering end and high-triggering end and control voltage
End, the low triggering end and high-triggering end are coupled between rheostat RP and the first electric capacity C1, the low triggering end and electric discharge
Diode D is coupled between end, the control voltage end is grounded after being coupled with the second electric capacity C2, and the output end is coupled with luminous
It is grounded after diode (LED), has been also coupled to the first operational amplifier Q1, first operational amplifier Q1 in-phase input end and timing
Chip U1 output end coupling, inverting input are grounded after being coupled with second resistance R2, and the first operational amplifier Q1's is defeated
Go out after end is coupled with first resistor (R1) and be coupled to second resistance R2, and be further coupled to faulty line, the signal picker 2 wraps
Transformer L, the second operational amplifier Q2 and the 3rd operational amplifier Q3 are included, the transformer L is hand-held transformer, described mutual
Sensor L secondary end and the second operational amplifier Q2 in-phase input end and inverting input couple, second operation amplifier
Device Q2 inverting input is grounded after being also coupled to the 4th resistance R4, and the output end of the second operational amplifier Q2 is coupled with
The 4th resistance R4 is coupled to after three resistance R3, the anti-phase defeated of the 3rd operational amplifier Q3 is coupled to after being also coupled to the 5th resistance R5
Enter end, the inverting input of the 3rd operational amplifier Q3 is also coupled to the 6th resistance R6 and the 3rd electric capacity C3 parallel with one another
The output end of the operational amplifier, the in-phase input end ground connection of the 3rd operational amplifier Q3, output end coupling are coupled to afterwards
There is zigbee modules and signal to receive locator 3 to communicate, the signal receive locator 3 include control CPU, liquid crystal display,
4G modules, GPRS module and zigbee modules, the control CPU couple with signal picker 2, the 4G modules, liquid crystal display
Device, GPRS module with control CPU couplings, when signal picker 2 collects data and is input in control CPU, are controlled
CPU processed shows the data by liquid crystal display, and obtains location position data by GPRS module, then will by 4G modules
Position data is sent, and when signal generation apparatus 1 works, its internal circuit will be connected, and at this moment power supply will lead to
The 7th resistance R7 and rheostat RP is crossed to charge to the first electric capacity C1, at the same timing chip U1 discharge end closing, output end output
High level, because in the presence of charging, the first electric capacity C1 terminal voltage will be raised constantly, and the terminal voltage can be continuous
Be input in low triggering end and high-triggering end, when the first electric capacity C1 terminal voltage lifting to high-triggering end trigger voltage when
Wait, timing chip U1 will be acted, discharge end is opened, while output end is changed to export low level, then now the first electric capacity
C1 will be discharged by rheostat RP to discharge end, then the first electric capacity C1 terminal voltage will slowly decline, and work as terminal voltage
When dropping to low triggering end, timing chip U1 will be acted, and discharge end is closed, while output end is changed to export high electricity again
Flat, the first electric capacity C1 terminal voltage continues to rise, and when high-triggering end is risen to, timing chip U1 can be acted again, repeats
Above-mentioned action, output can be changed into low level again again, and such timing chip U1 output end will export a square wave, and the ripple
Frequency can be by standardsizing rheostat RP resistance, and then adjust the first electric capacity C1 discharge and recharge time to realize, thus
The effective effect for realizing a signal and occurring, the frequency used in the present embodiment pass through light-emitting diodes for low frequency
Pipe LED setting, it is possible to allow people to know the signal output situation of signal generation apparatus 1 so that people can be timely and effectively
It is adjusted, when alien frequencies signal is injected into faulty line by signal generation apparatus 1, people's can holds letter
Number collector 2 detects all the way along faulty line, during detection, it is only necessary to transformer L is pressed close into faulty line,
Because when having Injection Signal to flow through in faulty line, magnetic field, such transformer L will be formed around faulty line
Can effectively induces electric current, effective by the second operational amplifier Q2 cans after transformer L induces electric current
The electric current induced to transformer L be amplified, simultaneously because the present embodiment is using low frequency signal, thus herein
One low pass filter is formed using the 3rd operational amplifier Q3, so can be transferred to signal with effective guarantee receives positioning
Signal in device 3 is Injection Signal, rather than other interference signals so that the positioning to trouble point is more accurate, and
Pass through the setting of zigbee modules, it is possible to which effective realize and signal receives wireless telecommunications between locator 3, one does not allow
It is vulnerable to the interference of faulty line, two carry out the generic failure circuit during detection can be higher, if the side using wire
Formula connection can be very inconvenient, after signal picker 2 arrives signal acquisition, will be sent out signal by zigbee modules
Give signal and receive locator 3, the zigbee modules that signal receives inside locator 3 will receive these signals, occur
While alien frequencies signal can be measured, when another side can not measure, the failure having been positioned on faulty line is at this moment meant that
Point, thus at this time GPRS module will obtain the position data of the trouble point, then be sent by 4G modules, this
Sample can effectively learns the position data of the trouble point of faulty line, compared in the prior art by the way of experience
Carry out the method for failure judgement point, it is fast and accurately more.
As a kind of improved embodiment, the rheostat RP includes base 4 and electrically connected with timing chip U1
Rotating disk 5, one end of the base 4 offers swivelling chute 41, and the rotating disk 5 is embedded into swivelling chute 41, the base 4
On along the circumferential edge of swivelling chute 41 along several resistance for different resistances are placed be embedded in embedding hole 411, the swivelling chute 41
Cell wall on offer and be provided with hemispherical contact with the one-to-one through hole 412 in embedding hole 411, the circumferential edge of the rotating disk 5
51, when resistance value is needed, rotating disk 5 is embedded into swivelling chute 41, and hemispherical contact 51 passes through one of through hole
412 and embedding hole 411 corresponding with the through hole 412 in resistance electrical connection, the rotating disk 5 is also coaxially solid backwards to one end of base 4
Surely there is column spinner 52, the side of the column spinner 52 is further opened with anti-slip veins, is needing the output frequency of change signal generation apparatus 1
When rate, that is, when changing rheostat RP access resistance, it is only necessary to hold column spinner 52, then turn column spinner
52 so that column spinner 52 drives rotating disk 5 in the internal rotation of swivelling chute 41, and while rotation, hemispherical contact 51 also can be with
Rotate together, hemispherical contact 51 rotate during, will be one by one be embedded into through hole 412, when hemispherical contact
51 when be embedded into a through hole 412, and resistance that will be in embedding hole 411 corresponding with the through hole 412 is in contact, and at this moment accesses
Resistance in circuit is just the resistance of the resistance, when hemispherical contact 51 is embedded into another through hole 412, Jiu Huiyu
Ohmic contact corresponding to the through hole 412 in embedding hole 411, the resistance at this moment accessed in circuit are just the resistance of this resistance, such as
This just can be good at playing a part of a conversion resistance, and the resistance converted is fixed resistance, thus would not go out
Now using conventional rheostat occur can not by resistance conversion to a suitable resistance the problem of.
In summary, ground-fault detection arrangement of the invention, the setting of signal generation apparatus 1 is passed through, it is possible to event
Hinder injection alien frequencies detection signal in circuit, effectively detected alien frequencies detection signal by signal picker 2, and pass through letter
Number reception locator 3 effectively sends out the position data of trouble point when signal picker 2 learns trouble point,
Accurately and effectively positioning action is played, this makes it possible to the trouble point of fast and accurately locating bad lines, compared to existing
It is quickly and accurately more by the way of artificial experience.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (1)
- A kind of 1. ground-fault detection arrangement, it is characterised in that：Including signal generation apparatus (1), signal picker (2) and signal Locator (3) is received, the signal generation apparatus (1) includes timing chip (U1), and the chip has discharge end and output end, institute To state discharge end and be coupled with rheostat (RP), one end of the rheostat (RP) is coupled to power supply after being coupled with the 7th resistance (R7), The other end couples the first electric capacity (C1) and is grounded afterwards, and the timing chip (U1) also has low triggering end and high-triggering end and control electricity Pressure side, the low triggering end and high-triggering end are coupled between rheostat (RP) and the first electric capacity (C1), the low triggering end Diode (D) is coupled between discharge end, the control voltage end is coupled with the second electric capacity (C2) and is grounded afterwards, the output end It is coupled with light emitting diode (LED) to be grounded afterwards, has been also coupled to the first operational amplifier (Q1), first operational amplifier (Q1) The output end of in-phase input end and timing chip (U1) couples, and inverting input is coupled with second resistance (R2) and is grounded afterwards, described The output end of first operational amplifier (Q1) is coupled to second resistance (R2) after being coupled with first resistor (R1), and is further coupled to event Hindering circuit, the signal picker (2) includes transformer (L), the second operational amplifier (Q2) and the 3rd operational amplifier (Q3), The transformer (L) is hand-held transformer, and the secondary end of the transformer (L) is same mutually defeated with the second operational amplifier (Q2) Enter end and inverting input coupling, after the inverting input of second operational amplifier (Q2) has been also coupled to the 4th resistance (R4) Ground connection, the output end of second operational amplifier (Q2) are coupled to the 4th resistance (R4) after being coupled with 3rd resistor (R3), also It is coupled with the inverting input that the 3rd operational amplifier (Q3) is coupled to after the 5th resistance (R5), the 3rd operational amplifier (Q3) inverting input, which is also coupled to be coupled to the computing after the 6th resistance (R6) and the 3rd electric capacity (C3) parallel with one another, to be put The output end of big device, the in-phase input end ground connection of the 3rd operational amplifier (Q3), output end be coupled with zigbee modules with Signal receives locator (3) communication, and the signal, which receives locator (3), includes control CPU, liquid crystal display, 4G modules, GPRS Module and zigbee modules, the control CPU couple with signal picker (2), the 4G modules, liquid crystal display, GPRS moulds Block is with control CPU couplings, and when signal picker (2) collects data and is input in control CPU, control CPU leads to Cross liquid crystal display and show the data, and location position data is obtained by GPRS module, then by 4G modules by positional number According to sending, the rheostat (RP) includes base (4) and the rotating disk (5) electrically connected with timing chip (U1), the bottom One end of seat (4) offers swivelling chute (41), and the rotating disk (5) is embedded into swivelling chute (41), on the base (4) along The circumferential edge of swivelling chute (41) is embedded in embedding hole (411), the swivelling chute (41) along several resistance for supplying different resistances are placed with Cell wall on offer and be provided with hemisphere with embedding hole (411) one-to-one through hole (412), the circumferential edge of the rotating disk (5) Shape contact (51), when resistance value is needed, rotating disk (5) is embedded into swivelling chute (41), and hemispherical contact (51) is worn The resistance electrical connection crossed in one of through hole (412) and embedding hole (411) corresponding with the through hole (412), rotating disk (5) back of the body Column spinner (52) is also coaxially fixed with to one end of base (4), the side of the column spinner (52) is further opened with anti-slip veins.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510805795.8A CN105259479B (en) | 2015-11-20 | 2015-11-20 | A kind of ground-fault detection arrangement |
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| CN201510805795.8A CN105259479B (en) | 2015-11-20 | 2015-11-20 | A kind of ground-fault detection arrangement |
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| CN105259479A CN105259479A (en) | 2016-01-20 |
| CN105259479B true CN105259479B (en) | 2018-02-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763935B (en) * | 2019-10-21 | 2024-05-14 | 瑞昱半导体股份有限公司 | Test system, transmitter and receiver for performing multiple tests |
| CN111693819B (en) * | 2020-05-25 | 2023-02-17 | 北京旋极信息技术股份有限公司 | Detection method and device |
| CN113702869B (en) * | 2021-09-16 | 2022-06-17 | 浙江日新电气有限公司 | Single-phase earth fault management system and control method |
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| JPS59141075A (en) * | 1983-01-17 | 1984-08-13 | Mitsubishi Electric Corp | Fault position detector for power transmission line |
| JPH06130116A (en) * | 1992-10-20 | 1994-05-13 | Matsushita Electric Ind Co Ltd | Transmission line fault searching device |
| CN201464598U (en) * | 2009-06-11 | 2010-05-12 | 程刚 | Concealed cable fault detector |
| CN201527459U (en) * | 2009-07-15 | 2010-07-14 | 覃锦衔 | Tracker of grounding point of power overhead line |
| CN201673234U (en) * | 2010-05-26 | 2010-12-15 | 西安兴汇电力科技有限公司 | Distribution line single-phase earth fault inspection device |
| CN102184625A (en) * | 2011-03-15 | 2011-09-14 | 辽宁省电力有限公司抚顺供电公司 | Third generation (3G) communication network-based transmission line fault area positioning system |
| CN202066934U (en) * | 2011-05-09 | 2011-12-07 | 航天科工深圳（集团）有限公司 | Single phase earth fault positioning system of transmission line |
| CN203812663U (en) * | 2014-03-19 | 2014-09-03 | 冯绍勇 | Variable resistor |
| CN205103363U (en) * | 2015-11-20 | 2016-03-23 | 国家电网公司 | Earth fault check out test set |
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2015
- 2015-11-20 CN CN201510805795.8A patent/CN105259479B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59141075A (en) * | 1983-01-17 | 1984-08-13 | Mitsubishi Electric Corp | Fault position detector for power transmission line |
| JPH06130116A (en) * | 1992-10-20 | 1994-05-13 | Matsushita Electric Ind Co Ltd | Transmission line fault searching device |
| CN201464598U (en) * | 2009-06-11 | 2010-05-12 | 程刚 | Concealed cable fault detector |
| CN201527459U (en) * | 2009-07-15 | 2010-07-14 | 覃锦衔 | Tracker of grounding point of power overhead line |
| CN201673234U (en) * | 2010-05-26 | 2010-12-15 | 西安兴汇电力科技有限公司 | Distribution line single-phase earth fault inspection device |
| CN102184625A (en) * | 2011-03-15 | 2011-09-14 | 辽宁省电力有限公司抚顺供电公司 | Third generation (3G) communication network-based transmission line fault area positioning system |
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