CN110021917A - Fault Isolation positioning system - Google Patents
Fault Isolation positioning system Download PDFInfo
- Publication number
- CN110021917A CN110021917A CN201910109587.2A CN201910109587A CN110021917A CN 110021917 A CN110021917 A CN 110021917A CN 201910109587 A CN201910109587 A CN 201910109587A CN 110021917 A CN110021917 A CN 110021917A
- Authority
- CN
- China
- Prior art keywords
- module
- turn
- signal
- carrier signal
- sent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The invention discloses a kind of Fault Isolation positioning systems, comprising: is set to the first turn-off module and the second turn-off module of system two sides, and the monitoring module connecting with the first turn-off module and the second turn-off module；When detecting current signal, the first turn-off module and the mutual carrier wave signal of the second turn-off module, and when not receiving the carrier signal of the second turn-off module feedback, the alarm signal for having location information is sent to monitoring module.Compared with prior art, the present invention carries out carrier signal by the first turn-off module and the second turn-off module and mutually passes and detect, to judge whether DC bus breaks down, keep fault judgement simple and efficient, and faulty line is isolated from system in the event of a failure, guarantee the safety of power supply, and the alarm signal with fault location information will be sent to monitor terminal, to realize the positioning and isolation of abort situation.
Description
Technical field
The present invention relates to power electronics field more particularly to Fault Isolation positioning systems.
Background technique
DC grid system at runtime, if power supply buses break down, will cause entire power grid or part power grid
Have a power failure, route overheat can occur because of short trouble due to certain section of route when serious, cause to cause fire, or due to open circuit fault and
Cause the danger such as electric shock.
Existing network system fault location and Fault Isolation, it is using centralized FEEDER AUTOMATION or sequentially heavy on the spot
Close FEEDER AUTOMATION.But centralized FEEDER AUTOMATION is limited by the scale in region, and real-time is with area's device within the domain
Increase and has a greatly reduced quality, it can not rapidly and accurately disengagement failure point；Sequence coincidence system is on the spot with time and non-faulting region
Have a power failure, in addition using be repeatedly overlapped impact system be cost complete failure isolation, influence power supply real-time, safety and reliably
Property.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that how safely and efficiently to detect and isolate circuit event
Barrier, while the position of positioning failure.
To solve the above problems, the embodiment of the present invention provides Fault Isolation positioning system, comprising:
Be set to the first turn-off module and the second turn-off module of system two sides, and with first turn-off module and institute
State the monitoring module of the second turn-off module connection；
The first end of first turn-off module is connect with the first end of second turn-off module by DC bus；
The second end of first turn-off module and the second end of second turn-off module are connect by the DC bus
Enter electric current；
First turn-off module is used for, and when listening to current signal, is believed with the mutual carrier wave of second turn-off module
Number, and when not receiving the carrier signal of the second turn-off module feedback, isolated fault point, Xiang Suoshu monitoring module
Send the first alarm signal；Wherein, first alarm signal includes the location information of first turn-off module；
The monitoring module is used for, and according to first alarm signal, determines the position of first turn-off module.
Further, second turn-off module is used for, and the mutual carrier wave signal of first turn-off module, and is not being connect
After the carrier signal for receiving the first turn-off module feedback, isolated fault point, Xiang Suoshu monitoring module sends second and accuses
Alert signal, so that the monitoring module determines the position of second turn-off module according to second alarm signal；Wherein,
Second alarm signal includes the location information of second turn-off module.
Further, the monitoring module is specifically used for:
First alarm signal and the second alarm signal are received, according to first alarm signal and second alarm
Signal determines the abort situation of fault point, and the abort situation is sent to intelligent terminal.
Further, first turn-off module includes first switch unit and first control unit；
The first control unit is used for, and after the second turn-off module of Xiang Suoshu sends the carrier signal, monitors described the
The carrier signal that two turn-off modules are sent, and when receiving the carrier signal that second turn-off module is sent,
It is closed the first switch unit, and sends the carrier signal to second turn-off module；If not receiving described second
The carrier signal that turn-off module is sent then disconnects the first switch unit, and sends first to the monitoring module and accuse
Alert signal.
Further, the first control unit includes: the first control subelement, the first signal transmission sub-unit and first
Signal receiving subelement；
The first control subelement is used for, and is controlled the first signal transmission sub-unit and is generated and sent the carrier wave letter
Number to second turn-off module, and when the first signal receiving subelement does not receive the institute that second turn-off module is sent
When stating carrier signal, the first switch unit is disconnected.
Further, first turn-off module further include: the first signal isolation unit；
The first signal isolation unit is connect with the second end of the first control unit；
The first signal isolation unit is used for, and the carrier signal is isolated, and limits the transmission range of the carrier signal.
Further, second turn-off module includes second switch unit and the second control unit；
Second control unit is used for, and monitors the carrier signal that first turn-off module is sent, and receiving
When the carrier signal sent to first turn-off module, it is closed the second switch unit, the breaking mould of Xiang Suoshu first
Block sends the carrier signal；If not receiving the carrier signal that first turn-off module is sent, described the is disconnected
Two switch units, and the second alarm signal is sent to the monitoring module.
Further, second control unit includes: the second control subelement, second signal transmission sub-unit and second
Signal receiving subelement；
The second control subelement is used for, and receives first open circuit when listening to the second signal receiving subelement
When the carrier signal that module is sent, it is closed the second switch unit, the second signal transmission sub-unit is controlled and generates
And the carrier signal is sent to first turn-off module, and when the second signal receiving subelement does not receive described first
When the carrier signal that turn-off module is sent, the second switch unit is disconnected.
Further, second turn-off module further include: second signal isolated location；
The second signal isolated location is used for, and the carrier signal is isolated, and limits the transmission range of the carrier signal.
The implementation of the embodiments of the present invention has the following beneficial effects:
A kind of Fault Isolation positioning system provided in an embodiment of the present invention, the present embodiment pass through the first turn-off module and second
Turn-off module carries out carrier signal and mutually passes and detect, to judge whether DC bus breaks down, makes fault judgement letter
It is single and efficient, and faulty line is isolated from system in the event of a failure, guarantee the safety of power supply, and will be to monitor terminal
The alarm signal for having fault location information is sent, to realize the positioning of abort situation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the Fault Isolation positioning system that one embodiment of the present of invention provides；
Fig. 2 is the structural schematic diagram for the Fault Isolation positioning system that another embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for the first control unit that one embodiment of the present of invention provides；
Fig. 4 is the structural schematic diagram for the second control unit that one embodiment of the present of invention provides；
Fig. 5 is the connection structure signal of the first control unit that one embodiment of the present of invention provides and the second control unit
Figure；
Fig. 6 is the structural schematic diagram for the Fault Isolation positioning system that yet another embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1.
It is the structural schematic diagram for the Fault Isolation positioning system that one embodiment of the present of invention provides referring to Fig. 1, comprising:
Be set to the first turn-off module 1 and the second turn-off module 2 of system two sides, and with the first turn-off module 1 and the second breaking mould
The monitoring module 3 that block 2 connects.
The first end of first turn-off module 1 is connect with the first end of the second turn-off module 2 by DC bus.First open circuit
The second end of module 1 and the second end of the second turn-off module 2 access electric current by DC bus.
First turn-off module 1 is used for, when listening to current signal, and the mutual carrier wave signal of the second turn-off module 2, and
When not receiving the carrier signal of the second turn-off module 2 feedback, isolated fault point sends the first alarm signal to monitoring module 3.
Wherein, the first alarm signal includes the location information of the first turn-off module 1.
Monitoring module 3 is used for, and according to the first alarm signal, determines the position of the first turn-off module 1.
In the present embodiment, before voltage access, the first turn-off module 1 and the second turn-off module 2 both are set to out
Open state.After accessing voltage, the first turn-off module 1 and the second turn-off module 2 are started to work, while the first turn-off module 1 is supervised
Current signal is heard, and after sending carrier signal to the second turn-off module 2, if the first turn-off module 1 is inscribed in the preset time
Receive the carrier signal of the second turn-off module 2 feedback, then it represents that the direct current between the first turn-off module 1 and the second turn-off module 2
Two buss lines are normal, and when first time to n-th receiving the carrier signal of the second turn-off module 2 feedback, to the second open circuit
Module 2 sends carrier signal.N≥2.
If the first turn-off module 1 does not receive the carrier signal of the second turn-off module 2 feedback, table within the preset time
There is open circuit or short trouble in DC bus route between bright first turn-off module 1 and the second turn-off module 2.First is disconnected at this time
Road module 1 and the second turn-off module 2 disconnect the switch connecting with DC bus, thus by the first turn-off module 1 and the second open circuit
The DC bus to break down between module 2 is kept apart, and sends abnormality alarming to monitoring module.
Further, the second turn-off module 2 is used for, and the mutual carrier wave signal of the first turn-off module 1, and is not receiving
After the carrier signal of one turn-off module 1 feedback, isolated fault point sends the second alarm signal to monitoring module 3, so that monitoring mould
Block 3 determines the position of the second turn-off module 2 according to the second alarm signal.Wherein, the second alarm signal includes the second turn-off module
Location information.
In the present embodiment, the second turn-off module 2 receives the load of the second turn-off module 1 transmission in first time to n-th
When wave signal, carrier signal is sent to the first turn-off module 1.If the second turn-off module 2 does not receive within the preset time
The carrier signal of one turn-off module 1 feedback, then the first turn-off module 1 and the second turn-off module 2 isolated fault point simultaneously.
In the present embodiment, monitoring module 3 is specifically used for:
The first alarm signal and the second alarm signal are received, according to the first alarm signal and the second alarm signal, determines event
Hinder the abort situation of point, and abort situation is sent to intelligent terminal.
Since the first turn-off module 1 and the second turn-off module 2 can all distribute a particular address in systems, when out
When existing failure, the first turn-off module 1 and the second turn-off module 2 can send the alarm signal comprising self-position to prison respectively
Module 3 is controlled, monitoring module 3 determines the abort situation of route according to the alarm signal received, and the abort situation is sent
It debugs to intelligent terminal so that system operator be notified timely to be handled, system and equipment is made to restore to operate normally
State.
The present embodiment carries out carrier signal by the first turn-off module and the second turn-off module and mutually passes and detect, to judge
Whether DC bus breaks down, and keeps fault judgement simple and efficiently, and in the event of a failure by faulty line from system
Middle isolation guarantees the safety of power supply, and will send the alarm signal with fault location information to monitor terminal, to realize
The positioning of abort situation.
Please refer to Fig. 2-5.
It further, referring to fig. 2, is that the structure of the Fault Isolation positioning system that another embodiment of the invention provides is shown
It is intended to.
In the present embodiment, the first turn-off module 1 includes first switch unit 11 and first control unit 12.
First control unit 12 is used for, and after sending carrier signal to the second turn-off module 2, monitors the second turn-off module 2 hair
The carrier signal sent, and when receiving the carrier signal of the second turn-off module 2 transmission, closure first switch unit 11, and to
Second turn-off module 2 sends carrier signal；If not receiving the carrier signal of the second turn-off module 2 transmission, disconnects first and open
Unit 11 is closed, and sends the first alarm signal to monitoring module 3.
In the present embodiment, the second turn-off module 2 includes second switch unit 21 and the second control unit 22.
Second control unit 22 is used for, and monitors the carrier signal that the first turn-off module 1 is sent, and receiving the first open circuit
When the carrier signal that module 1 is sent, it is closed second switch unit 21, and send carrier signal to the first turn-off module 1；If not connecing
The carrier signal for receiving the transmission of the first turn-off module 1 then disconnects second switch unit 21, and sends second to monitoring module 3 and accuse
Alert signal.
In the present embodiment, as shown in figure 3, first control unit 12 includes: the first control subelement 31, the first signal hair
Send subelement 32 and the first signal receiving subelement 33.
First control subelement 31 is used for, and the first signal transmission sub-unit 32 of control generates and sends carrier signal to second
Turn-off module 2, and when the first signal receiving subelement 33 does not receive the carrier signal of the second turn-off module 2 transmission, disconnect the
One switch unit 11.
In the present embodiment, as shown in figure 4, the second control unit 22 includes: the second control subelement 41, second signal hair
Send subelement 42 and second signal receiving subelement 43.
Second control subelement 41 is used for, and receives the first turn-off module 1 hair when listening to second signal receiving subelement 43
When the carrier signal sent, it is closed second switch unit 21, control second signal transmission sub-unit 42 generates and sends carrier signal
To the first turn-off module 1, and when second signal receiving subelement 43 does not receive the carrier signal of the first turn-off module 1 transmission,
Disconnect second switch unit 21.
Preferably, as shown in figure 5, first switch unit 11 and second switch unit 21 are before not accessing safe voltage
Off-state.After accessing safe voltage, the first control subelement 31 controls the first signal transmission sub-unit 32 when preset
In, carrier signal is sent to second signal receiving subelement 43.If second signal receiving subelement 43 receives the first signal
The carrier signal of transmission sub-unit 32, then it represents that the DC bus route in the above two sections is normal, and passes through the first control
Subelement 31 is closed second switch unit 21.
Second signal receiving subelement 43 is after the carrier signal for receiving the first signal transmission sub-unit 32, the second control
Subelement 41 controls second switch unit 21 and closes, while controlling second signal transmission sub-unit 42 within the preset time, sends out
Send carrier signal to the first signal receiving subelement 33.If the first signal receiving subelement 33 receives second signal and sends son list
The carrier signal that member 42 is sent, then the first control subelement 31 is closed first switch unit 11, determines when in the above two sections
DC bus route is normal, is passed to being converted to safe voltage by first switch unit 11 and second switch unit 21
Defeated normal voltage continues mutual carrier wave signal.
If the first signal receiving subelement 33 and second signal receiving subelement 43 do not receive load within the preset time
When wave signal, the DC bus line anomalies in the two section are indicated, the first control subelement 31 and the second control are single at this time
Member 41 controls first switch unit 11 respectively and second switch unit 21 disconnects, thus stop the transmission of normal voltage, isolation event
Hinder route, ensures the operation of regular link.
The present embodiment is closed switch when detecting carrier signal by carrying out the reception detection of carrier signal in advance
It closes, disconnects switch when no carrier signal, guarantee the safety of power supply, and by disconnecting switch, signal is made to stop passing
It is defeated, avoid signal from misinformating.
Please refer to Fig. 6.
It further, is that the structure for the Fault Isolation positioning system that yet another embodiment of the present invention provides is shown referring to Fig. 6
It is intended to.
In the present embodiment, the first turn-off module 1 further includes the first signal isolation unit 13.
First signal isolation unit 13 is used for, and carrier signal is isolated, limits the transmission range of the carrier signal.
Second turn-off module 2 further includes second signal isolated location 23.
Second signal isolated location 23 is used for, and carrier signal is isolated, limits the transmission range of the carrier signal.
Specifically, continuing carrier signal by the first signal isolation unit 13 of setting and second signal isolated location 23
It can be isolated when onwards transmission, so that carrier signal can only be transmitted between two turn-off modules.
The present embodiment is by the first signal isolation unit of setting and second signal isolated location, so that carrier signal is carrying out
It when transmission, is transmitted only along assigned direction, it is ensured that be able to carry out carrier wave between the first turn-off module and the second turn-off module
The mutual biography of signal, to guarantee the accuracy of line fault detection.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. a kind of Fault Isolation positioning system characterized by comprising be set to the first turn-off module and second of system two sides
Turn-off module, and the monitoring module being connect with first turn-off module and second turn-off module；
The first end of first turn-off module is connect with the first end of second turn-off module by DC bus；
The second end of first turn-off module and the second end of second turn-off module pass through DC bus access electricity
Stream；
First turn-off module is used for, when listening to current signal, and the mutual carrier wave signal of second turn-off module, and
When not receiving the carrier signal of the second turn-off module feedback, isolated fault point, Xiang Suoshu monitoring module is sent
First alarm signal；Wherein, first alarm signal includes the location information of first turn-off module；
The monitoring module is used for, and according to first alarm signal, determines the position of first turn-off module.
2. Fault Isolation positioning system according to claim 1, which is characterized in that second turn-off module is used for, with
The mutual carrier wave signal of first turn-off module, and in the carrier signal for not receiving the first turn-off module feedback
Afterwards, isolated fault point, Xiang Suoshu monitoring module send the second alarm signal, so that the monitoring module is according to second alarm
Signal determines the position of second turn-off module；Wherein, second alarm signal includes the position of second turn-off module
Confidence breath.
3. Fault Isolation positioning system according to claim 2, which is characterized in that the monitoring module is specifically used for:
First alarm signal and the second alarm signal are received, is believed according to first alarm signal and second alarm
Number, determine the abort situation of fault point, and the abort situation is sent to intelligent terminal.
4. Fault Isolation positioning system according to claim 1, which is characterized in that first turn-off module includes first
Switch unit and first control unit；
The first control unit is used for, and after the second turn-off module of Xiang Suoshu sends the carrier signal, it is disconnected to monitor described second
The carrier signal that road module is sent, and when receiving the carrier signal that second turn-off module is sent, closure
The first switch unit, and the carrier signal is sent to second turn-off module；If not receiving second open circuit
The carrier signal that module is sent then disconnects the first switch unit, and sends the first alarm letter to the monitoring module
Number.
5. Fault Isolation positioning system according to claim 4, which is characterized in that the first control unit includes:
One control subelement, the first signal transmission sub-unit and the first signal receiving subelement；
The first control subelement is used for, and is controlled the first signal transmission sub-unit and is generated and sent the carrier signal extremely
Second turn-off module, and when the first signal receiving subelement does not receive the load that second turn-off module is sent
When wave signal, the first switch unit is disconnected.
6. Fault Isolation positioning system according to claim 4, which is characterized in that first turn-off module further include:
First signal isolation unit；
The first signal isolation unit is used for, and the carrier signal is isolated, and limits the transmission range of the carrier signal.
7. Fault Isolation positioning system according to claim 1, which is characterized in that second turn-off module includes second
Switch unit and the second control unit；
Second control unit is used for, and monitors the carrier signal that first turn-off module is sent, and receiving
When stating the carrier signal of the first turn-off module transmission, it is closed the second switch unit, the first turn-off module of Xiang Suoshu hair
Send the carrier signal；If not receiving the carrier signal that first turn-off module is sent, disconnects described second and open
Unit is closed, and sends the second alarm signal to the monitoring module.
8. Fault Isolation positioning system according to claim 7, which is characterized in that second control unit includes:
Two control subelements, second signal transmission sub-unit and second signal receiving subelement；
The second control subelement is used for, and receives first turn-off module when listening to the second signal receiving subelement
When the carrier signal sent, it is closed the second switch unit, the second signal transmission sub-unit is controlled and generates concurrently
Send the carrier signal to first turn-off module, and when the second signal receiving subelement does not receive first open circuit
When the carrier signal that module is sent, the second switch unit is disconnected.
9. Fault Isolation positioning system according to claim 7, which is characterized in that second turn-off module further include:
Second signal isolated location；
The second signal isolated location is used for, and the carrier signal is isolated, and limits the transmission range of the carrier signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109587.2A CN110021917B (en) | 2019-02-11 | 2019-02-11 | Fault isolation positioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910109587.2A CN110021917B (en) | 2019-02-11 | 2019-02-11 | Fault isolation positioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110021917A true CN110021917A (en) | 2019-07-16 |
| CN110021917B CN110021917B (en) | 2021-04-13 |
Family
ID=67188957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910109587.2A Active CN110021917B (en) | 2019-02-11 | 2019-02-11 | Fault isolation positioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110021917B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106711964A (en) * | 2016-11-17 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Differential protection system and method for double-end line |
| 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 |
| 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 |
| 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 |
-
2019
- 2019-02-11 CN CN201910109587.2A patent/CN110021917B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106711964A (en) * | 2016-11-17 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Differential protection system and method for double-end line |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110021917B (en) | 2021-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6008971A (en) | Fault protection arrangement for electric power distribution systems | |
| JPH10228426A (en) | Bus system and operating method for bus system | |
| KR20110084674A (en) | System for monitoring a communication failure of power device based on ethernet and method therefor | |
| CN109062184A (en) | Two-shipper emergency and rescue equipment, failure switching method and rescue system | |
| CN110021917A (en) | Fault Isolation positioning system | |
| JP2024016274A (en) | booster | |
| RU2006146687A (en) | COMPUTER NETWORK SECURITY | |
| CN202583805U (en) | Digital control system | |
| CN109079793A (en) | Industrial robot safety guard and its working method, industrial robot and its working method | |
| CN212249666U (en) | Logic control circuit for subway platform door system and signal interface | |
| JP3622401B2 (en) | Method of detecting short circuit in monitoring system for disaster prevention, monitoring method for disaster prevention using the same, monitoring system for disaster prevention | |
| JP4878917B2 (en) | Isolator | |
| CN111364874A (en) | Logic control circuit for subway platform door system and signal interface | |
| CN219627735U (en) | Bus safety alarm system | |
| JP4208104B2 (en) | Security system terminal device | |
| CN212988464U (en) | Large-scale equipment fault diagnosis system | |
| CN215934815U (en) | Photovoltaic system and local manager | |
| CN220896367U (en) | Urban rail traffic direct-current bilateral power supply jump loop monitoring and protecting module | |
| CN109391484B (en) | Exchanger device suitable for transformer substation and fault warning method | |
| CN106448014A (en) | Ship fire alarm system with redundancy design and control method thereof | |
| CN115473492A (en) | Photovoltaic system and method for operating same | |
| JP2672682B2 (en) | Automatic recovery device | |
| JP3470466B2 (en) | Isolator and alarm system | |
| CN110850852A (en) | Industrial control equipment fault notification system and method | |
| CN115473491A (en) | Photovoltaic system, local manager and self-checking method of photovoltaic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |