CN110021917B - Fault isolation positioning system - Google Patents
Fault isolation positioning system Download PDFInfo
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- CN110021917B CN110021917B CN201910109587.2A CN201910109587A CN110021917B CN 110021917 B CN110021917 B CN 110021917B CN 201910109587 A CN201910109587 A CN 201910109587A CN 110021917 B CN110021917 B CN 110021917B
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- module
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- circuit breaking
- carrier signal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- Monitoring And Testing Of Transmission In General (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The invention discloses a fault isolation positioning system, which comprises: the monitoring system comprises a first circuit breaking module, a second circuit breaking module and a monitoring module, wherein the first circuit breaking module and the second circuit breaking module are arranged on two sides of the system; when the current signal is detected, the first circuit breaking module and the second circuit breaking module mutually transmit carrier signals, and when the carrier signals fed back by the second circuit breaking module are not received, the first circuit breaking module and the second circuit breaking module send alarm signals with position information to the monitoring module. Compared with the prior art, the method and the device have the advantages that the first circuit breaking module and the second circuit breaking module are used for carrying out mutual transmission and detection of carrier signals, so that whether the direct-current bus fails or not is judged, the circuit failure is judged simply and efficiently, the failure circuit is isolated from the system when the failure occurs, the power supply safety is ensured, and the alarm signal with the failure position information is sent to the monitoring terminal, so that the positioning and isolation of the failure position are realized.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a fault isolation positioning system.
Background
When a direct current power grid system runs, if a power supply bus fails, the power of the whole power grid or part of the power grid is cut off, and in severe cases, a certain section of circuit is overheated due to short-circuit failure, so that fire disasters are caused, or electric shock and other dangers are caused due to open-circuit failure.
The existing power grid system fault location and fault isolation adopt a centralized feeder automation technology or an in-situ sequential overlapping feeder automation technology. However, the centralized feeder automation technology is limited by the scale of the area, so that the real-time performance is greatly reduced along with the increase of devices in the area, and the fault point cannot be quickly and accurately cut off; in the local sequential reclosing mode, the interruption of power in a time and non-fault area is completed, even the fault isolation is completed at the cost of multiple reclosing impact systems, and the real-time performance, safety and reliability of power supply are influenced.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is how to safely and efficiently detect and isolate a circuit fault and locate the position of the fault.
To solve the above problem, an embodiment of the present invention provides a fault isolation positioning system, including:
the system comprises a first circuit breaking module, a second circuit breaking module and a monitoring module, wherein the first circuit breaking module and the second circuit breaking module are arranged on two sides of the system;
the first end of the first circuit breaking module is connected with the first end of the second circuit breaking module through a direct current bus;
the second end of the first circuit breaking module and the second end of the second circuit breaking module are connected with current through the direct current bus;
the first circuit breaking module is used for mutually transmitting a carrier signal with the second circuit breaking module when a current signal is monitored, isolating a fault point when the carrier signal fed back by the second circuit breaking module is not received, and sending a first alarm signal to the monitoring module; wherein the first alarm signal comprises position information of the first disconnection module;
and the monitoring module is used for determining the position of the first circuit breaking module according to the first alarm signal.
Further, the second disconnection module is configured to transmit a carrier signal to and from the first disconnection module, isolate a fault point after not receiving the carrier signal fed back by the first disconnection module, and send a second alarm signal to the monitoring module, so that the monitoring module determines a position of the second disconnection module according to the second alarm signal; wherein the second alarm signal includes location information of the second disconnect module.
Further, the monitoring module is specifically configured to:
and receiving the first alarm signal and the second alarm signal, determining the fault position of a fault point according to the first alarm signal and the second alarm signal, and sending the fault position to the intelligent terminal.
Further, the first circuit breaking module comprises a first switch unit and a first control unit;
the first control unit is configured to monitor the carrier signal sent by the second disconnection module after sending the carrier signal to the second disconnection module, and close the first switch unit and send the carrier signal to the second disconnection module when receiving the carrier signal sent by the second disconnection module; if the carrier signal sent by the second circuit breaking module is not received, the first switch unit is disconnected, and a first alarm signal is sent to the monitoring module.
Further, the first control unit includes: the device comprises a first control subunit, a first signal sending subunit and a first signal receiving subunit;
the first control subunit is configured to control the first signal sending subunit to generate and send the carrier signal to the second disconnection module, and disconnect the first switch unit when the first signal receiving subunit does not receive the carrier signal sent by the second disconnection module.
Further, the first disconnection module further includes: a first signal isolation unit;
the first signal isolation unit is connected with the second end of the first control unit;
the first signal isolation unit is used for isolating the carrier signal and limiting the transmission range of the carrier signal.
Further, the second circuit breaking module comprises a second switch unit and a second control unit;
the second control unit is configured to monitor the carrier signal sent by the first disconnection module, and when receiving the carrier signal sent by the first disconnection module, close the second switch unit, and send the carrier signal to the first disconnection module; and if the carrier signal sent by the first disconnection module is not received, disconnecting the second switch unit and sending a second alarm signal to the monitoring module.
Further, the second control unit includes: the second control subunit, the second signal sending subunit and the second signal receiving subunit;
the second control subunit is configured to, when it is monitored that the second signal receiving subunit receives the carrier signal sent by the first disconnection module, close the second switch unit, control the second signal sending subunit to generate and send the carrier signal to the first disconnection module, and, when the second signal receiving subunit does not receive the carrier signal sent by the first disconnection module, disconnect the second switch unit.
Further, the second disconnection module further includes: a second signal isolation unit;
the second signal isolation unit is used for isolating the carrier signal and limiting the transmission range of the carrier signal.
The embodiment of the invention has the following beneficial effects:
in the fault isolation positioning system provided by the embodiment of the invention, the first circuit breaking module and the second circuit breaking module are used for carrying out mutual transmission and detection of carrier signals, so that whether the direct current bus fails or not is judged, the circuit fault judgment is simple and efficient, the fault line is isolated from the system when the fault occurs, the power supply safety is ensured, and an alarm signal with fault position information is sent to the monitoring terminal, so that the fault position is positioned.
Drawings
FIG. 1 is a schematic block diagram of a fault isolation location system provided by one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a fault isolation location system provided by yet another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first control unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second control unit provided in an embodiment of the present invention;
fig. 5 is a schematic diagram of a connection structure of a first control unit and a second control unit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a fault isolation positioning system according to still another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1.
Referring to fig. 1, it is a schematic structural diagram of a fault isolation positioning system provided in an embodiment of the present invention, including: the system comprises a first circuit breaking module 1 and a second circuit breaking module 2 which are arranged at two sides of the system, and a monitoring module 3 connected with the first circuit breaking module 1 and the second circuit breaking module 2.
The first end of the first breaking module 1 is connected with the first end of the second breaking module 2 through a direct current bus. And the second ends of the first circuit breaking module 1 and the second circuit breaking module 2 are connected with current through a direct current bus.
The first circuit breaking module 1 is configured to, when a current signal is monitored, mutually transmit a carrier signal with the second circuit breaking module 2, isolate a fault point when the carrier signal fed back by the second circuit breaking module 2 is not received, and send a first alarm signal to the monitoring module 3.
Wherein the first alarm signal comprises the location information of the first disconnection module 1.
The monitoring module 3 is configured to determine the location of the first shutdown module 1 according to the first alarm signal.
In the present embodiment, both the first disconnection module 1 and the second disconnection module 2 are set to the open state before the voltage is switched on. After voltage is switched in, the first disconnection module 1 and the second disconnection module 2 start to work, meanwhile, the first disconnection module 1 monitors a current signal and sends a carrier signal to the second disconnection module 2, and then if the first disconnection module 1 receives the carrier signal fed back by the second disconnection module 2 within a preset time, it indicates that a direct current bus line between the first disconnection module 1 and the second disconnection module 2 is normal, and when the carrier signal fed back by the second disconnection module 2 is received for the first time to the nth time, the carrier signal is sent to the second disconnection module 2. N is more than or equal to 2.
If the first disconnection module 1 does not receive the carrier signal fed back by the second disconnection module 2 within the preset time, it indicates that the direct current bus line between the first disconnection module 1 and the second disconnection module 2 is disconnected or short-circuited. At the moment, the first circuit breaking module 1 and the second circuit breaking module 2 break the switch connected with the direct current bus, so that the direct current bus with a fault between the first circuit breaking module 1 and the second circuit breaking module 2 is isolated, and an abnormal alarm is sent to the monitoring module.
Further, the second circuit breaking module 2 is configured to mutually transmit a carrier signal with the first circuit breaking module 1, isolate a fault point after not receiving the carrier signal fed back by the first circuit breaking module 1, and send a second alarm signal to the monitoring module 3, so that the monitoring module 3 determines the position of the second circuit breaking module 2 according to the second alarm signal. And the second alarm signal comprises the position information of the second circuit breaking module.
In this embodiment, the second disconnection module 2 sends the carrier signal to the first disconnection module 1 when receiving the carrier signal sent by the second disconnection module 1 from the first time to the nth time. If the second disconnection module 2 does not receive the carrier signal fed back by the first disconnection module 1 within the preset time, the first disconnection module 1 and the second disconnection module 2 simultaneously isolate the fault point.
In this embodiment, the monitoring module 3 is specifically configured to:
and receiving the first alarm signal and the second alarm signal, determining the fault position of the fault point according to the first alarm signal and the second alarm signal, and sending the fault position to the intelligent terminal.
Because the first circuit breaking module 1 and the second circuit breaking module 2 are both assigned with a specific address in the system, when a fault occurs, the first circuit breaking module 1 and the second circuit breaking module 2 respectively send an alarm signal containing the position of the first circuit breaking module 1 and the position of the second circuit breaking module 2 to the monitoring module 3, the monitoring module 3 determines the fault position of the circuit according to the received alarm signal and sends the fault position to the intelligent terminal, so that a system manager is informed to process the fault in time, the fault is eliminated, and the system and the equipment are enabled to recover to a normal operation state.
The embodiment carries out mutual transmission and detection of carrier signals through the first circuit breaking module and the second circuit breaking module, so that whether the direct current bus breaks down or not is judged, the circuit fault judgment is simple and efficient, a fault line is isolated from a system when the direct current bus breaks down, the power supply safety is guaranteed, an alarm signal with fault position information is sent to the monitoring terminal, and the fault position is positioned.
Please refer to fig. 2-5.
Further, referring to fig. 2, a schematic structural diagram of a fault isolation positioning system according to yet another embodiment of the present invention is shown.
In the present embodiment, the first disconnection module 1 includes a first switching unit 11 and a first control unit 12.
The first control unit 12 is configured to monitor the carrier signal sent by the second disconnection module 2 after sending the carrier signal to the second disconnection module 2, and close the first switch unit 11 and send the carrier signal to the second disconnection module 2 when receiving the carrier signal sent by the second disconnection module 2; if the carrier signal sent by the second disconnection module 2 is not received, the first switch unit 11 is disconnected, and a first alarm signal is sent to the monitoring module 3.
In the present embodiment, the second disconnection module 2 includes a second switching unit 21 and a second control unit 22.
The second control unit 22 is configured to monitor a carrier signal sent by the first disconnection module 1, and when receiving the carrier signal sent by the first disconnection module 1, close the second switch unit 21 and send the carrier signal to the first disconnection module 1; if the carrier signal sent by the first disconnection module 1 is not received, the second switch unit 21 is disconnected, and a second alarm signal is sent to the monitoring module 3.
In the present embodiment, as shown in fig. 3, the first control unit 12 includes: a first control subunit 31, a first signal transmitting subunit 32 and a first signal receiving subunit 33.
The first control subunit 31 is configured to control the first signal sending subunit 32 to generate and send a carrier signal to the second disconnection module 2, and to disconnect the first switch unit 11 when the first signal receiving subunit 33 does not receive the carrier signal sent by the second disconnection module 2.
In the present embodiment, as shown in fig. 4, the second control unit 22 includes: a second control subunit 41, a second signal transmitting subunit 42 and a second signal receiving subunit 43.
The second control subunit 41 is configured to, when it is monitored that the second signal receiving subunit 43 receives the carrier signal sent by the first disconnection module 1, close the second switch unit 21, control the second signal sending subunit 42 to generate and send the carrier signal to the first disconnection module 1, and, when the second signal receiving subunit 43 does not receive the carrier signal sent by the first disconnection module 1, open the second switch unit 21.
Preferably, as shown in fig. 5, the first switching unit 11 and the second switching unit 21 are in an off state before the safety voltage is not accessed. After the safety voltage is switched on, the first control subunit 31 controls the first signal sending subunit 32 to send the carrier signal to the second signal receiving subunit 43 within a preset time. If the second signal receiving subunit 43 receives the carrier signal of the first signal sending subunit 32, it indicates that the dc bus line in the current two intervals is normal, and the first control subunit 31 closes the second switch unit 21.
After the second signal receiving subunit 43 receives the carrier signal from the first signal sending subunit 32, the second control subunit 41 controls the second switch unit 21 to turn off, and controls the second signal sending subunit 42 to send the carrier signal to the first signal receiving subunit 33 within a preset time. If the first signal receiving subunit 33 receives the carrier signal sent by the second signal sending subunit 42, the first control subunit 31 closes the first switch unit 11, and determines that the direct-current bus line in the current interval between the first switch unit 11 and the second switch unit 21 is normal, so as to convert the safe voltage into a normal voltage for transmission through the first switch unit 11 and the second switch unit 21, and continue to transmit the carrier signal to each other.
If the first signal receiving subunit 33 and the second signal receiving subunit 43 do not receive the carrier signal within the preset time, which indicates that the dc bus line between the two is abnormal, at this time, the first control subunit 31 and the second control subunit 41 respectively control the first switch unit 11 and the second switch unit 21 to be turned off, so as to stop the transmission of the normal voltage, isolate the faulty line, and ensure the operation of the normal line.
The embodiment detects the reception of the carrier signal in advance, closes the switch when the carrier signal is detected, and opens the switch when the carrier signal is not detected, so that the safety of power supply is ensured, and the signal is stopped from being transmitted by opening the switch, so that the signal is prevented from being mistakenly transmitted.
Please refer to fig. 6.
Further, referring to fig. 6, a schematic structural diagram of a fault isolation positioning system according to still another embodiment of the present invention is provided.
In this embodiment, the first disconnection module 1 further comprises a first signal isolation unit 13.
The first signal isolation unit 13 is configured to isolate the carrier signal and to define a transmission range of the carrier signal.
The second disconnection module 2 also comprises a second signal isolation unit 23.
The second signal isolation unit 23 is configured to isolate the carrier signal and to define a transmission range of the carrier signal.
Specifically, by arranging the first signal isolation unit 13 and the second signal isolation unit 23, the carrier signal can be isolated when being transmitted forward, so that the carrier signal can be transmitted only between the two disconnection modules.
This embodiment is through setting up first signal isolation unit and second signal isolation unit for carrier signal only transmits along the direction of designation when transmitting, ensures that first break module and second break module can carry out the mutual biography of carrier signal between the module, thereby guarantees the accuracy of line fault detection.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A fault isolation location system, comprising: the system comprises a first circuit breaking module, a second circuit breaking module and a monitoring module, wherein the first circuit breaking module and the second circuit breaking module are arranged on two sides of the system;
the first end of the first circuit breaking module is connected with the first end of the second circuit breaking module through a direct current bus;
the second end of the first circuit breaking module and the second end of the second circuit breaking module are connected with current through the direct current bus;
the first circuit breaking module is used for mutually transmitting a carrier signal with the second circuit breaking module when a current signal is monitored, isolating a fault point when the carrier signal fed back by the second circuit breaking module is not received, and sending a first alarm signal to the monitoring module; wherein the first alarm signal comprises position information of the first disconnection module;
the monitoring module is used for determining the position of the first circuit breaking module according to the first alarm signal;
the first circuit breaking module comprises a first switch unit and a first control unit;
the first control unit is configured to monitor the carrier signal sent by the second disconnection module after sending the carrier signal to the second disconnection module, and close the first switch unit and send the carrier signal to the second disconnection module when receiving the carrier signal sent by the second disconnection module; if the carrier signal sent by the second circuit breaking module is not received, the first switch unit is disconnected, and a first alarm signal is sent to the monitoring module.
2. The fault isolation positioning system according to claim 1, wherein the second shutdown module is configured to communicate a carrier signal with the first shutdown module, isolate a fault point after not receiving the carrier signal fed back by the first shutdown module, and send a second alarm signal to the monitoring module, so that the monitoring module determines a location of the second shutdown module according to the second alarm signal; wherein the second alarm signal includes location information of the second disconnect module.
3. The fault isolation positioning system of claim 2, wherein the monitoring module is specifically configured to:
and receiving the first alarm signal and the second alarm signal, determining the fault position of a fault point according to the first alarm signal and the second alarm signal, and sending the fault position to the intelligent terminal.
4. The fault isolation locating system of claim 1, wherein the first control unit comprises: the device comprises a first control subunit, a first signal sending subunit and a first signal receiving subunit;
the first control subunit is configured to control the first signal sending subunit to generate and send the carrier signal to the second disconnection module, and disconnect the first switch unit when the first signal receiving subunit does not receive the carrier signal sent by the second disconnection module.
5. The fault isolation positioning system of claim 1, wherein the first trip module further comprises: a first signal isolation unit;
the first signal isolation unit is used for isolating the carrier signal and limiting the transmission range of the carrier signal.
6. The fault isolation positioning system of claim 1, wherein the second trip module comprises a second switching unit and a second control unit;
the second control unit is configured to monitor the carrier signal sent by the first disconnection module, and when receiving the carrier signal sent by the first disconnection module, close the second switch unit, and send the carrier signal to the first disconnection module; and if the carrier signal sent by the first disconnection module is not received, disconnecting the second switch unit and sending a second alarm signal to the monitoring module.
7. The fault isolation locating system of claim 6, wherein the second control unit comprises: the second control subunit, the second signal sending subunit and the second signal receiving subunit;
the second control subunit is configured to, when it is monitored that the second signal receiving subunit receives the carrier signal sent by the first disconnection module, close the second switch unit, control the second signal sending subunit to generate and send the carrier signal to the first disconnection module, and, when the second signal receiving subunit does not receive the carrier signal sent by the first disconnection module, disconnect the second switch unit.
8. The fault isolation positioning system of claim 6, wherein the second trip module further comprises: a second signal isolation unit;
the second signal isolation unit is used for isolating the carrier signal and limiting the transmission range of the carrier signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109587.2A CN110021917B (en) | 2019-02-11 | 2019-02-11 | Fault isolation positioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109587.2A CN110021917B (en) | 2019-02-11 | 2019-02-11 | Fault isolation positioning system |
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| CN110021917A CN110021917A (en) | 2019-07-16 |
| CN110021917B true CN110021917B (en) | 2021-04-13 |
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| CN114362844A (en) * | 2021-12-29 | 2022-04-15 | 北京万集科技股份有限公司 | Antenna device, method for diagnosing a malfunction of an on-board unit and related product |
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| JP2016071480A (en) * | 2014-09-29 | 2016-05-09 | 沖電気工業株式会社 | Failure monitoring system, failure monitoring method, and failure monitoring program |
| CN205283129U (en) * | 2015-12-28 | 2016-06-01 | 国网山东省电力公司经济技术研究院 | Can realize that intelligent substation that voltage parallels enlarges interior bridging line system |
| CN106711964B (en) * | 2016-11-17 | 2018-11-13 | 云南电网有限责任公司电力科学研究院 | Double line terminal differential protective system and method |
| CN107064713A (en) * | 2017-03-22 | 2017-08-18 | 南京南瑞继保电气有限公司 | A kind of electric line broken string method of discrimination and system |
| CN107015118A (en) * | 2017-05-05 | 2017-08-04 | 广东正力通用电气有限公司 | A kind of supply lines break monitoring system and method |
| CN109116167A (en) * | 2018-07-27 | 2019-01-01 | 中国电力科学研究院有限公司 | A kind of cable grounding line monitoring device and method based on coupling coil |
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