CN206523583U - A kind of single-phase earth fault positioning device based on GPS synchronous data collections - Google Patents
A kind of single-phase earth fault positioning device based on GPS synchronous data collections Download PDFInfo
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- CN206523583U CN206523583U CN201621407664.0U CN201621407664U CN206523583U CN 206523583 U CN206523583 U CN 206523583U CN 201621407664 U CN201621407664 U CN 201621407664U CN 206523583 U CN206523583 U CN 206523583U
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- microcontroller
- gps
- switching point
- earth fault
- positioning device
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- Locating Faults (AREA)
Abstract
The utility model discloses a kind of single-phase earth fault positioning device based on GPS synchronous data collections, including center protected host, the block switch mechanism for controlling each switching point opening and closing state and multiple synchronous testing agencies for being used to gather each switching point fault message；The synchronous testing agency includes the first microcontroller, gps antenna and the data storage connected with the first microcontroller, the input of first microcontroller is terminated with A/D change-over circuits and gps receiver, phase-locked oscilaltor is connected between gps receiver and the A/D change-over circuit, the block switch includes the second microcontroller and block switch state monitoring module.The utility model is simple in construction, reasonable in design, realize each switching point uniform sampling clock, the uniformity of sample frequency is ensure that, the information of each switching point can be comprehensively utilized, the positioning of this Feeder section can be independently realized and quickly isolate function.
Description
Technical field
The utility model belongs to single-phase earth fault positioning device technical field, and in particular to one kind is based on the same step numbers of GPS
According to the single-phase earth fault positioning device of collection.
Background technology
In recent years, with Chinese society expanding economy, power distribution network scale is gradually increased, and distribution net work structure is more complicated,
Requirement more and more higher of the user to power supply reliability.Small current neutral grounding mode, single-phase earthing event are typically used in China's power distribution network
Barrier probability of happening is up to 80%, if determining that faulty line completes, to faulty line processing, to easily cause fault spread not in time,
The safe and stable operation of serious threat power distribution network.This requires that after failure occurs abort situation should be correctly found, rapid to arrange
Except failure, it is ensured that power distribution network safe operation, power supply reliability is improved, by minimization of loss.When single-phase earthing event occurs for power distribution network
During barrier, current relay protection is based on local and measures composition nearby, simply system point or the limited fortune of regional area of reflection
Row state, it is impossible to reflect the safety operation level of large area power distribution network.Lack information between the superior and the subordinate's protective relaying device to hand over
Mutually, it is difficult to which singlephase earth fault is positioned.The collecting zone multipoint fault information of real-time synchronization can be realized, is to realize event
Hinder the key of positioning.Accordingly, it would be desirable to which a kind of single-phase earth fault positioning device based on GPS synchronous data collections, passes through center
Protected host real-time synchronization collects the singlephase earth fault information of each switching point, relies on the communications platform of real-time high-efficiency to realize information
Shared, integrated treatment failure completes Feeder positioning and quickly isolates failure function, is conducive to reducing power failure model
Enclose, improve relay protection performance, reliable guarantee is provided for the safe and stable operation of power distribution network.
Utility model content
Technical problem to be solved in the utility model is to be based on there is provided one kind for above-mentioned deficiency of the prior art
The single-phase earth fault positioning device of GPS synchronous data collections, its is simple in construction, reasonable in design, realizes each switching point unified
Sampling clock, it is ensured that the uniformity of sample frequency, can comprehensively utilize the information of each switching point, reach information sharing, so that
Breakdown judge and protection act are drawn, the protection cooperation of the superior and the subordinate can not only be completed, and the selection protected between level can be realized, is carried
The high reliability and security of separating brake, practical using easy to operate, using effect is good, is easy to promote the use of.
In order to solve the above technical problems, the technical solution adopted in the utility model is：One kind is adopted based on GPS synchrodatas
The single-phase earth fault positioning device of collection, it is characterised in that：Including center protected host, for controlling each switching point divide-shut brake shape
The block switch mechanism of state and multiple synchronous testing agencies for being used to gather each switching point fault message；The synchronous testing agency
Gps antenna including the first microcontroller, for receiving satellite radio signal and deposited with the data that the first microcontroller connects
Reservoir, the input of first microcontroller is terminated with A/D change-over circuits and the gps receiver for receiving gps antenna signal,
The phase-locked oscilaltor for realizing sample-synchronous, the A/D conversions electricity are connected between gps receiver and the A/D change-over circuit
The input on road is terminated with voltage detection module and current detection module；The block switch mechanism include the second microcontroller and with
The block switch state monitoring module that second microcontroller input connects, the output of second microcontroller is terminated with liquid crystal
Display screen and block switch separating brake module；First communication module is connected between the center protected host and the first microcontroller,
Second communication module is connected between the center protected host and the second microcontroller；The block switch separating brake module includes many
The individual block switch on each switching point.
A kind of above-mentioned single-phase earth fault positioning device based on GPS synchronous data collections, it is characterised in that：The electricity
Pressure detection module includes voltage transformer and the voltage signal conditioning circuit connected with voltage transformer output end, the electric current inspection
Surveying module includes current transformer and the current signal conditioning circuit connected with current transformer output end.
A kind of above-mentioned single-phase earth fault positioning device based on GPS synchronous data collections, it is characterised in that：It is described
Gps receiver is GPS-LVS series OEM receivers.
A kind of above-mentioned single-phase earth fault positioning device based on GPS synchronous data collections, it is characterised in that：The lock
Oscillator phase is compensation crystal oscillator TCOX.
The utility model has advantages below compared with prior art：
1st, the utility model is simple in construction, reasonable in design, realizes and using easy to operate.
2nd, the singlephase earth fault information of each switching point is real-time transmitted to center protected host by the utility model, and center is protected
Separating brake instruction is passed to subordinate by shield main frame by second communication module, can not only complete the protection cooperation of the superior and the subordinate, Er Qieneng
The selection protected between level is realized, accurate separating brake is realized, the reliability and security of separating brake is improved.
3rd, the utility model uses gps antenna and gps receiver, for eliminating the crystal oscillating circuit of the first microcontroller
The clock signal errors brought, realize each switching point uniform sampling clock, measured signal starts sampling in synchronization, using lock
Oscillator phase ensure that the uniformity of sample frequency, and pass through voltage detection module, current detection module and block switch state
Monitoring modular, gathers each switching point singlephase earth fault information, realizes to the singlephase earth fault information in regional extent
Real-time synchronization is gathered, and reliability is high, and practical, using effect is good, is easy to promote the use of.
4th, the utility model can show the opening and closing state of each switching point, and can realize failure logging, convenient work people
Member checks line fault, improves the correctness and accuracy of failure removal.
In summary, the utility model is simple in construction, reasonable in design, realizes each switching point uniform sampling clock, it is ensured that
The uniformity of sample frequency, can comprehensively utilize the information of each switching point, reach information sharing, thus draw breakdown judge and
Protection act, can not only complete the protection cooperation of the superior and the subordinate, and can realize the selection protected between level, improve the reliable of separating brake
Property and security, practical using easy to operate, using effect is good, is easy to promote the use of.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Description of reference numerals:
1-center protected host；2-synchronization testing agency；3-gps antenna；
4-gps receiver；5-phase-locked oscilaltor；6-voltage transformer；
7-voltage signal conditioning circuit；8-current transformer；9-current signal conditioning circuit；
10-A/D change-over circuits；11-data storage；12-the first microcontroller；
13-first communication module；14-second communication module；15-the second microcontroller；
16-LCDs；17-block switch state monitoring module；
18-block switch separating brake module.
Embodiment
As shown in figure 1, the utility model includes center protected host 1, point for controlling each switching point opening and closing state
Section switching mechanism 19 and multiple synchronous testing agencies 2 for being used to gather each switching point fault message；The synchronous testing agency 2 wraps
Include the first microcontroller 12, the gps antenna 3 for receiving satellite radio signal and the data connected with the first microcontroller 12
Memory 11, the input of first microcontroller 12 is terminated with A/D change-over circuits 10 and for receiving the signal of gps antenna 3
Gps receiver 4, is connected to the phase-locked oscilaltor for realizing sample-synchronous between the gps receiver 4 and A/D change-over circuits 10
5, the input of the A/D change-over circuits 10 is terminated with voltage detection module and current detection module；The block switch mechanism 19
The block switch state monitoring module 17 connected including the second microcontroller 15 and with the input of the second microcontroller 15, described
The output of two microcontrollers 15 is terminated with LCDs 16 and block switch separating brake module 18；The center protected host 1 with
First communication module 13 is connected between first microcontroller 12, the microcontroller 15 of center protected host 1 and second is indirect
There is second communication module 14；The block switch separating brake module 18 includes multiple block switches on each switching point.
As shown in figure 1, in the present embodiment, the voltage detection module includes voltage transformer 6 and defeated with voltage transformer 6
Go out the voltage signal conditioning circuit 7 that end connects, the current detection module includes current transformer 8 and defeated with current transformer 8
Go out the current signal conditioning circuit 9 that end connects.
In the present embodiment, the gps receiver 4 is GPS25-LVS series OEM receivers.
In the present embodiment, the phase-locked oscilaltor 5 is compensation crystal oscillator TCOX.
When it is implemented, gps antenna 3 is used for the radio signal for receiving satellite, gps receiver 4 is received from GPS
After the radio signal of antenna 3,1pps pulse signal is exported as the external interrupt input source of the first microcontroller 12, is used for
The clock signal errors that the crystal oscillating circuit inside the first microcontroller 12 is brought are eliminated, each switching point uniform sampling clock is realized,
Measured signal starts sampling in synchronization.Phase-locked oscilaltor 5 uses compensation crystal oscillator TCOX, and the oscillator signal of output is passed through
Cross the synchronous sampling with high precision frequency that sample frequency is met after shaping and level translation, it is ensured that measured signal is adopted according to same
Sample frequency sampling, it is ensured that the uniformity of sample frequency.
Synchronous sampling with high precision signal frequency is sent to A/D change-over circuits 10 by compensation crystal oscillator TCOX.Pass through electricity
Pressure transformer 6 gathers the voltage signal of each switching point in real time, and voltage signal is sent into voltage signal conditioning circuit 7, voltage letter
Number modulate circuit 7 is converted to voltage signal size in the accessible number range of A/D change-over circuits 10, passes through Current Mutual Inductance
Device 8 gathers the current signal of each switching point in real time, and current signal is sent into current signal conditioning circuit 9, current signal conditioning
Circuit 9 is converted to current signal size in the accessible number range of A/D change-over circuits 10, and A/D change-over circuits 10 are according to same
Walk sampling with high precision frequency and digital-to-analogue conversion is carried out to voltage signal and current signal, then pass to the first microcontroller 12, it is real
Now the real-time synchronization of the singlephase earth fault information in regional extent is gathered.
Voltage signal and electricity that multiple first microcontrollers 12 are collected each switching point by first communication module 13
Stream signal sends center protected host 1 to, realizes information sharing, and block switch state monitoring module 17 is used to monitor each switching point
The opening and closing state of upper block switch, is then transferred to the second microcontroller 15, and the second microcontroller 15 passes through the second communication mould
Block 14 sends opening and closing state to center protected host 1.Center protected host 1 judges singlephase earth fault, then makes point
Lock is selected, and separating brake is instructed into minute passed at block switch separating brake module 18, breakdown switch point by second communication module 14
Section switch motion, so as to draw breakdown judge and protection act, can not only realize protection cooperation between the superior and the subordinate, and can be real
The selection protected between existing level, improves the reliability and security of separating brake.
It is described above, only it is embodiment of the present utility model, not the utility model is imposed any restrictions, it is every according to this
Any simple modification, change and equivalent structure change that utility model technical spirit is made to above example, still fall within
In the protection domain of technical solutions of the utility model.
Claims (4)
1. a kind of single-phase earth fault positioning device based on GPS synchronous data collections, it is characterised in that：Protect and lead including center
Machine (1), the block switch mechanism (19) for controlling each switching point opening and closing state and it is multiple be used for gather each switch point failure
The synchronous testing agency (2) of information；
The synchronous testing agency (2) includes the first microcontroller (12), the gps antenna for receiving satellite radio signal
(3) data storage (11) and with the first microcontroller (12) connected, the input of first microcontroller (12) is terminated with
A/D change-over circuits (10) and the gps receiver (4) for receiving gps antenna (3) signal, the gps receiver (4) and A/D turn
The phase-locked oscilaltor (5) being connected to for realizing sample-synchronous, the input of the A/D change-over circuits (10) are changed between circuit (10)
It is connected to voltage detection module and current detection module；
The block switch mechanism (19) includes the second microcontroller (15) and connected with the second microcontroller (15) input
Block switch state monitoring module (17), the output of second microcontroller (15) is terminated with LCDs (16) and segmentation
Switch separating brake module (18)；
First communication module (13) is connected between the center protected host (1) and the first microcontroller (12), the center is protected
Second communication module (14) is connected between shield main frame (1) and the second microcontroller (15)；
The block switch separating brake module (18) includes multiple block switches on each switching point.
2. according to a kind of single-phase earth fault positioning device based on GPS synchronous data collections described in claim 1, its feature
It is：The voltage detection module includes voltage transformer (6) and the voltage signal connected with voltage transformer (6) output end is adjusted
Circuit (7) is managed, the current detection module includes current transformer (8) and the electric current connected with current transformer (8) output end
Signal conditioning circuit (9).
3. according to a kind of single-phase earth fault positioning device based on GPS synchronous data collections described in claim 1, its feature
It is：The gps receiver (4) is GPS25-LVS series OEM receivers.
4. according to a kind of single-phase earth fault positioning device based on GPS synchronous data collections described in claim 1, its feature
It is：The phase-locked oscilaltor (5) is compensation crystal oscillator TCOX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621407664.0U CN206523583U (en) | 2016-12-20 | 2016-12-20 | A kind of single-phase earth fault positioning device based on GPS synchronous data collections |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621407664.0U CN206523583U (en) | 2016-12-20 | 2016-12-20 | A kind of single-phase earth fault positioning device based on GPS synchronous data collections |
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| CN206523583U true CN206523583U (en) | 2017-09-26 |
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| CN201621407664.0U Expired - Fee Related CN206523583U (en) | 2016-12-20 | 2016-12-20 | A kind of single-phase earth fault positioning device based on GPS synchronous data collections |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677933A (en) * | 2017-11-21 | 2018-02-09 | 桂林师范高等专科学校 | Detecting fault line for un-ground neutral power system |
-
2016
- 2016-12-20 CN CN201621407664.0U patent/CN206523583U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677933A (en) * | 2017-11-21 | 2018-02-09 | 桂林师范高等专科学校 | Detecting fault line for un-ground neutral power system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170926 Termination date: 20191220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |