CN107677933A - Detecting fault line for un-ground neutral power system - Google Patents
Detecting fault line for un-ground neutral power system Download PDFInfo
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- CN107677933A CN107677933A CN201711168104.3A CN201711168104A CN107677933A CN 107677933 A CN107677933 A CN 107677933A CN 201711168104 A CN201711168104 A CN 201711168104A CN 107677933 A CN107677933 A CN 107677933A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 81
- 241001269238 Data Species 0.000 claims description 17
- 230000003750 conditioning effect Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000001360 synchronised effect Effects 0.000 abstract description 5
- 238000012546 transfer Methods 0.000 description 5
- 230000016507 interphase Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Classifications
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention discloses detecting fault line for un-ground neutral power system, in A, B, C phase, current transformer, controller circuitry and interphased data transmission circuit are set respectively, gather three-phase line current signal, and collection signal is transmitted to the controller circuitry of a wherein phase and is controlled and transmits, when there is single-phase earthing, short circuit or open circuit fault in power distribution network, it can be showed by electric current, the present invention sets threephase current transformer, can complete the fault detect to three-phase line；After B phase control devices circuit receives pps pulse per second signal and synchronous time mark signal from GPS circuitry, to A, C phase control device circuit sending signal, so that unification of A, B, C three-phase on synchronization collection current instantaneous value, sequential, adequately detection, which is out of order, provides rigorous data basis；Primary cut-out is additionally provided with, when circuit breaks down, starts primary cut-out immediately, open-circuit line, ensures equipment safety and personal safety.
Description
Technical field
The present invention relates to the fault detect of supply line, and in particular to detecting fault line for un-ground neutral power system.
Background technology
Power distribution network is by overhead transmission line, cable, shaft tower, distribution transformer, disconnecting switch, reactive-load compensator and some are attached
The compositions such as facility, be the network that distribution electric energy effect is played in power network.Electric power distribution network bulky complex, branch are more, number of devices
Amount is more, and fault location complexity is high.
Existing distribution network failure detection method is impedance method and traveling wave method.Impedance method assumes that transmission line parameters phase
Together, it is believed that the impedance of fault loop or reactance its shortcoming directly proportional to the distance of measurement point are event under different faults type condition
Barrier point is big apart from calculation error, can not exclude pseudo- failure.Traveling wave method is counted using the time difference at fault traveling wave arrival circuit both ends
Fault distance is calculated, reliability is high, but the both ends time is difficult to synchronization, and extra installation exchanges the passage of data, and cost is too high.
Therefore, the device high up for proposing a kind of detection distribution network failure degree of accuracy.
The content of the invention
The present invention provides detecting fault line for un-ground neutral power system, solves the problems, such as that accuracy in detection is low existing for prior art.
The present invention solves the above problems by the following technical programs：
Detecting fault line for un-ground neutral power system, including A phase current mutual inductors, A phase control devices circuit, A phases interphased data transmission electricity
Road, B phase current mutual inductors, B phase control devices circuit, B phase interphased datas transmission circuit, GPS circuitry, C phase current mutual inductors, C phases
Controller circuitry, C phase interphased data transmission circuits and primary cut-out；The output end and A of the A phase current mutual inductors are phased
Device circuit processed is connected；The A phases interphased data transmission circuit is connected with A phase control device circuits, the A phases interphased data transmission electricity
Road is connected with B phase interphased data transmission circuits；The control terminal of the primary cut-out is connected with A phase control device circuits；The B phases
The output end of current transformer is connected with B phase control device circuits, the output end of the GPS circuitry and the control of B phase control device circuits
End processed is connected；The B phases interphased data transmission circuit is connected with B phase control device circuits, the B phases interphased data transmission circuit with
C phase interphased data transmission circuits are connected；The output end of the C phase current mutual inductors is connected with C phase control device circuits；The C phases
Interphased data transmission circuit is connected with C phase control device circuits.
Further, zero-sequence current transmitter, output end and the A phase controls of the zero-sequence current transmitter are further comprised
Device circuit is connected.
Further, in addition to wireless transmission circuit, the wireless transmission circuit is connected with A phase control device circuits, described
Wireless transmission circuit is connected with exterior terminal.
Further, voice alarm circuit, control terminal and the A phase control device circuits of the voice alarm circuit are also included
It is connected.
Further, in addition to signal conditioning circuit and protection circuit；The A phase current mutual inductors are through signal conditioning circuit
And protection circuit is connected with A phase control device circuits；The B phase current mutual inductors are through signal conditioning circuit and protection circuit and B phases
Controller circuitry is connected；The C phase current mutual inductors are connected through signal conditioning circuit and protection circuit with C phase control device circuits.
Further, in addition to CT power-supply circuits and charging and discharging lithium battery circuit；The CT power-supply circuits are A phases electricity
Current transformer, A phase control devices circuit, A phase interphased datas transmission circuit, B phase current mutual inductors, B phase control devices circuit, B phase phases
Between data transmission circuit, GPS circuitry, C phase current mutual inductors, C phase control devices circuit, C phase interphased data transmission circuits and height
Voltage breaker is powered, and the charging and discharging lithium battery circuit is the A phase current mutual inductors, A phase control devices circuit, the alternate number of A phases
It is mutual according to transmission circuit, B phase current mutual inductors, B phase control devices circuit, B phase interphased datas transmission circuit, GPS circuitry, C phase currents
Sensor, C phase control devices circuit, C phase interphased data transmission circuits and primary cut-out power supply.
Compared with prior art, there are following features：
1st, current transformer, controller circuitry and interphased data transmission circuit are set respectively in A, B, C phase, gather three-phase
Line current signal, and collection signal is transmitted to the controller circuitry of a wherein phase and is controlled and transmits, when power distribution network goes out
When existing single-phase earthing, short circuit or open circuit fault, it can be showed by electric current, the present invention sets threephase current transformer, can
Complete the fault detect to three-phase line；B phase control devices circuit receives pps pulse per second signal and synchronous time mark letter from GPS circuitry
After number, to A, C phase control device circuit sending signal so that A, B, C three-phase are on synchronization collection current instantaneous value, sequential
Unified, adequately detection, which is out of order, provides rigorous data basis；Primary cut-out is additionally provided with, is broken down in circuit
When, start primary cut-out immediately, open-circuit line, ensure equipment safety and personal safety；
2nd, zero-sequence current transmitter is provided with, whether detection three-phase occurs earth fault, examined zero-sequence current as failure
Object is surveyed, contributes to failure to improve accuracy in detection；Wireless transmission circuit is set, transmitting fault information to exterior terminal has
The failure situation of circuit is remotely grasped beneficial to staff；Voice alarm circuit is set, starts voice reporting when detection is out of order
Alert circuit, reminds holdee, staff herein may be dangerous；
The 3rd, signal condition and protection circuit are provided, the current signal of acquisition is filtered, to each controller circuitry, alternate
Data transmission circuit etc. is protected, and safeguards the stability of each circuit of the present invention.
Brief description of the drawings
Fig. 1 is structural principle block diagram of the present invention.
Embodiment
The invention will be further described with reference to embodiments, but the invention is not limited in these embodiments.
Detecting fault line for un-ground neutral power system, including A phase current mutual inductors, A phase control devices circuit, A phases interphased data transmission electricity
Road, B phase current mutual inductors, B phase control devices circuit, B phase interphased datas transmission circuit, GPS circuitry, C phase current mutual inductors, C phases
Controller circuitry, C phase interphased data transmission circuits and primary cut-out；The output end and A of the A phase current mutual inductors are phased
Device circuit processed is connected；The A phases interphased data transmission circuit is connected with A phase control device circuits, the A phases interphased data transmission electricity
Road is connected with B phase interphased data transmission circuits；The control terminal of the primary cut-out is connected with A phase control device circuits；The B phases
The output end of current transformer is connected with B phase control device circuits, the output end of the GPS circuitry and the control of B phase control device circuits
End processed is connected；The B phases interphased data transmission circuit is connected with B phase control device circuits, the B phases interphased data transmission circuit with
C phase interphased data transmission circuits are connected；The output end of the C phase current mutual inductors is connected with C phase control device circuits；The C phases
Interphased data transmission circuit is connected with C phase control device circuits.
GPS circuitry provides clock for the present invention, for ensureing time precision.GPS circuitry provides pulse per second (PPS) and synchronous time mark,
Pulse per second (PPS) provides same clock for each current transformer, and after GPS second pulse arrival, B phase control devices circuit produces interruption, leads to
Cross B phase interphased data transmission circuits and send instruction to A phase interphased data transmission circuits and C phase interphased datas transmission circuit, lead to
Cross A phase control device circuits and C phase control device circuits control A phase current mutual inductors, C phase current mutual inductors collection electric current respectively, together
When control B phase current mutual inductors collection electric current so that the current transformer on A, B, C three-phase gathers electric current simultaneously, ensures sequential
Unification, improve the present invention detection failure the degree of accuracy.
The electric current that B phase current mutual inductors collect is transmitted to A phases interphased data by B phase interphased data transmission circuits and transmitted
Circuit, and be finally-transmitted in A phase control device circuits, similarly, the electric current that C phase current mutual inductors collect passes through the alternate number of B phases
Inputted according to transmission circuit and A phase interphased data transmission circuits into A phase control device circuits, the electricity that A circuitry phase transformers collect
Stream is also input in A phase control device circuits, and accident analysis is uniformly carried out by A phase control device circuits.
A phase current mutual inductors, B phase current mutual inductors, C phase current mutual inductors use the middle Fe-based amorphous magnetic cut
Core, uniformly around 1200 circle enamel-covered wires, load resistance is 10 Ω.
A phase interphased datas transmission circuit, B phase interphased datas transmission circuit, C phase interphased data transmission circuits are closely
Data transmission circuit, mutual send instructions and data.B phase control device circuits receive pulse per second (PPS) and the synchronous time mark of GPS circuitry
Signal, by B phase interphased data transmission circuits to A phase inter-phase transfers circuits and C phase inter-phase transfers circuit sending signals, control A,
B, the current transformer of C three-phases gathers electric current simultaneously, and the circuit collected is through A phase interphased datas transmission circuit, B phase interphased datas
Transmission circuit, C phase interphased data transmission circuits are transmitted to A phase control device circuits, are controlled and are passed by A phase control device circuits
It is defeated.
As long as the A, current anomaly that any current transformer of B, C three-phase senses, A phase control device circuits start high pressure immediately
Breaker, overload electric current and short circuit current are cut off, ensure equipment safety and personal safety.
In three-phase circuit, the phasor of three-phase current and be zero, a current transformer is accessed in phase three-wire three, now
Induced-current is zero.When occurring getting an electric shock or leaking electricity, there is leakage current to flow through in loop, now three-phase current phasor and be not
Zero, by detecting zero-sequence current, it can determine whether out whether there is electric shock or leaky in circuit.The present invention is additionally provided with zero-sequence current
Transmitter, the output end of the zero-sequence current transmitter are connected with A phase control device circuits.Zero-sequence current transmitter senses triple line
The zero-sequence current on road, once obtain phasor and be not that A phase control device circuits start primary cut-out immediately.
To realize the monitoring to power distribution network current information, the present invention is further additionally provided with wireless transmission circuit, the nothing
Line transmission circuit is connected with A phase control device circuits, and the wireless transmission circuit is connected with exterior terminal.Wireless transmission circuit will be former
Hinder information transfer to exterior terminal, staff can obtain fault message in exterior terminal.
The present invention is additionally provided with voice alarm circuit, control terminal and the A phase control device circuit phases of the voice alarm circuit
Even.Voice alarm circuit is set in test point, when detecting failure, A phase control device circuit start voice alarm circuits, reminded
Taken care toward pedestrian and staff, remind staff to carry out breakdown maintenance.
The present invention is additionally provided with signal conditioning circuit and protection circuit；The A phase current mutual inductors are through signal conditioning circuit
And protection circuit is connected with A phase control device circuits；The B phase current mutual inductors are through signal conditioning circuit and protection circuit and B phases
Controller circuitry is connected；The C phase current mutual inductors are connected through signal conditioning circuit and protection circuit with C phase control device circuits.
Signal conditioning circuit carries out Current Voltage conversion, voltage follow and ratio to the output signal of A, B, C threephase current transformer
Amplification, protection circuit are protected to the controller circuitry of load end, interphased data transmission circuit etc..
The present invention is additionally provided with CT power-supply circuits and charging and discharging lithium battery circuit；The CT power-supply circuits are A phases electricity
Current transformer, A phase control devices circuit, A phase interphased datas transmission circuit, B phase current mutual inductors, B phase control devices circuit, B phase phases
Between data transmission circuit, GPS circuitry, C phase current mutual inductors, C phase control devices circuit, C phase interphased data transmission circuits and height
Voltage breaker is powered, and the charging and discharging lithium battery circuit is the A phase current mutual inductors, A phase control devices circuit, the alternate number of A phases
It is mutual according to transmission circuit, B phase current mutual inductors, B phase control devices circuit, B phase interphased datas transmission circuit, GPS circuitry, C phase currents
Sensor, C phase control devices circuit, C phase interphased data transmission circuits and primary cut-out power supply.
The present invention the course of work be：
GPS circuitry sends pulse signal and synchronous time mark signal to B phase control devices circuit, during B phase control devices circuit produces
Break signal, by B phase interphased datas transmission circuit, A phase inter-phase transfers circuits to A phase control device circuit sending signals, pass through B phases
Interphased data transmission circuit, C phase inter-phase transfers circuits are started simultaneously to A, B, C triple line to C phase control device circuit sending signals
The electric current on road is sensed, and detected current signal is transmitted to A phase control device circuits by interphased data transmission circuit,
When the current anomaly of any phase, start primary cut-out immediately, alarmed by voice alarm circuit, and fault message is passed
Transport to exterior terminal；Zero-sequence current transmitters sense three-phase zero-sequence current is additionally provided with, is equally input when zero-sequence current exception
To A phase control devices circuit control and transmit accordingly.
Claims (6)
1. detecting fault line for un-ground neutral power system, it is characterised in that：
Including A phase current mutual inductors, A phase control devices circuit, A phase interphased datas transmission circuit, B phase current mutual inductors, B phase controls
Device circuit, B phase interphased datas transmission circuit, GPS circuitry, C phase current mutual inductors, C phase control devices circuit, C phases interphased data pass
Transmission of electricity road and primary cut-out；
The output end of the A phase current mutual inductors is connected with A phase control device circuits；The A phases interphased data transmission circuit and A phases
Controller circuitry is connected, and the A phases interphased data transmission circuit is connected with B phase interphased data transmission circuits；The high pressure open circuit
The control terminal of device is connected with A phase control device circuits；
The output end of the B phase current mutual inductors is connected with B phase control device circuits, output end and the B phase controls of the GPS circuitry
The control terminal of device circuit is connected；The B phases interphased data transmission circuit is connected with B phase control device circuits, the B phases interphased data
Transmission circuit is connected with C phase interphased data transmission circuits；
The output end of the C phase current mutual inductors is connected with C phase control device circuits；The C phases interphased data transmission circuit and C phases
Controller circuitry is connected.
2. detecting fault line for un-ground neutral power system according to claim 1, it is characterised in that：
Further comprise zero-sequence current transmitter, the output end of the zero-sequence current transmitter is connected with A phase control device circuits.
3. detecting fault line for un-ground neutral power system according to claim 1, it is characterised in that：
Further comprise wireless transmission circuit, the wireless transmission circuit is connected with A phase control device circuits, described to be wirelessly transferred electricity
Road is connected with exterior terminal.
4. detecting fault line for un-ground neutral power system according to claim 1, it is characterised in that：
Further comprise voice alarm circuit, the control terminal of the voice alarm circuit is connected with A phase control device circuits.
5. detecting fault line for un-ground neutral power system according to claim 1, it is characterised in that：
Further comprise signal conditioning circuit and protection circuit；The A phase current mutual inductors are through signal conditioning circuit and protection electricity
Road is connected with A phase control device circuits；The B phase current mutual inductors are through signal conditioning circuit and protection circuit and B phase controls device electricity
Road is connected；The C phase current mutual inductors are connected through signal conditioning circuit and protection circuit with C phase control device circuits.
6. detecting fault line for un-ground neutral power system according to claim 1, it is characterised in that：
Further comprise CT power-supply circuits and charging and discharging lithium battery circuit；The CT power-supply circuits be the A phase current mutual inductors,
A phase control devices circuit, A phase interphased datas transmission circuit, B phase current mutual inductors, B phase control devices circuit, the transmission of B phases interphased data
Circuit, GPS circuitry, C phase current mutual inductors, C phase control devices circuit, C phase interphased data transmission circuits and primary cut-out supply
Electricity, the charging and discharging lithium battery circuit be the A phase current mutual inductors, A phase control devices circuit, A phase interphased datas transmission circuit,
B phase current mutual inductors, B phase control devices circuit, B phase interphased datas transmission circuit, GPS circuitry, C phase current mutual inductors, C phase controls
Device circuit, C phase interphased data transmission circuits and primary cut-out power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168104.3A CN107677933A (en) | 2017-11-21 | 2017-11-21 | Detecting fault line for un-ground neutral power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711168104.3A CN107677933A (en) | 2017-11-21 | 2017-11-21 | Detecting fault line for un-ground neutral power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107677933A true CN107677933A (en) | 2018-02-09 |
Family
ID=61150705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711168104.3A Pending CN107677933A (en) | 2017-11-21 | 2017-11-21 | Detecting fault line for un-ground neutral power system |
Country Status (1)
| Country | Link |
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| CN (1) | CN107677933A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839568A (en) * | 2019-02-25 | 2019-06-04 | 国家电网有限公司 | Transmission line malfunction diagnostic system based on zero-sequence current detection |
| CN112782530A (en) * | 2021-01-18 | 2021-05-11 | 珠海安瑞通电子科技有限公司 | Fault indicator for line real-time fault judgment and control method and equipment thereof |
| WO2021245511A1 (en) * | 2020-06-05 | 2021-12-09 | Electricity Generating Authority Of Thailand (Egat) | Line fault locator |
| CZ309912B6 (en) * | 2022-07-24 | 2024-01-31 | Vysoká Škola Báňská - Technická Univerzita Ostrava | Method of online localization of single-pole failure of distribution network line due to ground fault and a system to perform this method |
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Application publication date: 20180209 |