CN109387680A - Urban rail tractive power supply system and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system - Google Patents
Urban rail tractive power supply system and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system Download PDFInfo
- Publication number
- CN109387680A CN109387680A CN201811197601.0A CN201811197601A CN109387680A CN 109387680 A CN109387680 A CN 109387680A CN 201811197601 A CN201811197601 A CN 201811197601A CN 109387680 A CN109387680 A CN 109387680A
- Authority
- CN
- China
- Prior art keywords
- current
- electric power
- signal
- main transformer
- urban
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of urban rail tractive power supply systems and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system, the urban electric power main transformer D.C. magnetic biasing problem as caused by urban rail stray electrical current of monitoring, system composition is: entire synchronous monitoring system is divided into urban rail drainage net current monitoring subsystem, electric power neutral point of main transformer current monitoring subsystem, the subsystem of comprehensive analysis three subsystems；The urban rail drainage net current monitoring subsystem hardware is successively made of Hall sensor, signal regulating panel, data collecting card, GPRS wireless transport module, industrial personal computer；The electric power neutral point of main transformer current monitoring subsystem hardware is successively made of Hall current sensor, signal regulating panel, data collecting card, industrial personal computer.
Description
Technical field
The present invention relates to equipment on-line monitoring field, specially a kind of urban rail tractive power supply system and urban electric power main transformer are straight
Flow bias synchronous monitoring system.
Background technique
In recent years, urban track traffic achieves swift and violent development in China, ends for the end of the year 2016, CONTINENTAL AREA OF CHINA is
There are 30 cities to open operation and amount to 133 city rail traffic routes, operating line total length is up to 4152.8 kilometers.City rail
Road tractive power supply system generally uses direct current supply mode, and subway train, which take from contact net (or third rail), to flow and pass through steel
Rail realizes reflux.However, causing one part of current to be leaked to shape in ground since rail of subway is difficult to accomplish completely insulated with the earth
At stray electrical current in ground, with municipal rail train is extensive, high density operation, in networking is presented in stray electrical current, superposition increases
The characteristics of change, causes ground potential to distort, it is sufficient to have an impact to urban electric power main transformer and be showed by DC magnetic bias phenomena.
In previous cognition, the DC magnetic bias phenomena of transformer is mainly by HVDC transmission system or geomagnetic induction current
Cause, electric power main transformer DC magnetic bias phenomena caused by urban rail stray electrical current is just found and is paid attention in recent years, at present
Monitoring device there is no to monitor this expansion, it is therefore desirable to which a kind of urban rail tractive power supply system and urban electric power main transformer D.C. magnetic biasing are same
Monitoring system is walked, monitoring analysis is unfolded to electric power main transformer DC magnetic bias phenomena caused by urban rail stray electrical current.
Summary of the invention
It is an object of the invention to provide a kind of urban rail tractive power supply system prisons synchronous with urban electric power main transformer D.C. magnetic biasing
The cost of implementation of examining system, the system is low, obtains information accurately, reliably, components of system as directed realizes wirelessly transmitting data, convenient for monitoring
The placement and recycling of system, will not influence the normal operation of urban distribution network and urban track traffic.
Entire synchronous monitoring system is divided into urban rail drainage net current monitoring subsystem, electric power neutral point of main transformer current monitoring
System, the subsystem of comprehensive analysis three subsystems；The urban rail drainage net current monitoring subsystem hardware by Hall sensor,
Signal regulating panel, data collecting card, GPRS wireless transport module, industrial personal computer are successively constituted；The electric power neutral point of main transformer electricity
Stream monitoring subsystem hardware is successively made of Hall current sensor, signal regulating panel, data collecting card, industrial personal computer；Described
Simultaneous synthesis analyzing subsystem hardware is made of background server.
The present invention is to realize its second purpose the technical scheme adopted is that a kind of urban rail tractive power supply system and city
The functional application of electric power main transformer D.C. magnetic biasing synchronous monitoring system is as follows:
1) acquisition and processing of urban rail drainage net current signal: the connecting cable of drainage net in city rail traffic route
Place installs open-close type Hall current sensor additional.The installation of open-close type Hall sensor does not need power failure operation, does not influence city rail
The normal operation of road traffic.The collected multichannel urban rail drainage net current analog signal of open-close type Hall sensor is input to letter
Number conditioning plate, becomes available analog signal after equal proportion enhanced processing, which is input to data collecting card through too low
Bandpass filter circuit, zero temperature float correct circuit, analog to digital conversion circuit processing become remove AC influence signal drainage net electric current
Digital signal, the digital signal carry out wireless signal transmission, final multichannel drainage net using GPRS wireless transmission and receiving module
Current digital signal imports industrial personal computer, using industrial personal computer built-in hard disk by the storage of multichannel drainage net current digital signal in case the later period
It is external aobvious using industrial personal computer VGA video output interface with electric power neutral point of main transformer direct-current component digital signal Synchronization Analysis
Display screen realizes that urban rail drainage net current signal visualizes output on the spot.Industrial personal computer GP configuring S time service module to each road signal into
Row sync identification guarantees each road drainage net current digital signal time synchronization.
The arrangement of multiple monitoring nodes needs to comprehensively consider tractive transformer section position and distance, determines arrangement principle such as
Under: it finds and separates out the nearest urban rail place on line in existing DC magnetic bias phenomena electric power main transformer geographical location, with the urban rail place on line
On the basis of point, the bidirectional arrangements urban rail drainage net current monitoring node since datum mark, since datum mark between each monitoring node
It is followed successively by 500m, 1000m away from position, forms the urban rail drainage net current monitoring section of 3000m range.If it is existing D.C. magnetic biasing occur
As electric power main transformer is nearby there are a plurality of urban rail route, then a plurality of urban rail route arranges monitoring node by same principle.
2) acquisition and processing of the neutral point direct current signal of urban electric power main transformer: in the neutral point of urban electric power main transformer
Earthing bar installs open-close type Hall current sensor additional.The installation of open-close type Hall sensor does not need power failure operation, does not influence city
Alternating current advocate become normal operation.The collected transformer neutral point current analog signal of open-close type Hall sensor is input to
Signal regulating panel, becomes available analog signal after equal proportion enhanced processing, which is input to data collecting card process
Low-pass filtering, temperature and zero float amendment, analog/digital conversion processing become removing power frequency and high order frequency AC compounent transformer it is neutral
Point DC current digital signal, transformer neutral point DC current digital data transmission is into industrial personal computer, using built in industrial personal computer
Hard disk is by the storage of transformer neutral point DC current component digital signals in case later period and urban rail drainage net current digital signal are same
Step analysis, using industrial personal computer VGA video output interface externally connected with display screen realize urban electric power neutral point of main transformer current signal and its
DC component signal visualizes output on the spot.To guarantee that electric power neutral point of main transformer current signal and each road urban rail drainage net electric current are believed
Number synchronization carries out each electric power neutral point of main transformer current signal and its DC component signal in industrial personal computer GP configuring S time service module
Sync identification.
Wherein, open-close type Hall sensor is by primary circuit, magnetism gathering rings, hall device, secondary coil and amplifying circuit etc.
Composition, works under magnetic balance type working method.It specifically, is exactly that major loop is tested transformer neutral point electric current in magnetism gathering rings
The magnetic field that place generates is compensated by the magnetic field that a secondary current generates, so that hall device is in Zero flux
Dynamic equilibrium working condition.
3) impact analysis of the urban rail tractive power supply system to urban electric power main transformer D.C. magnetic biasing: as caused by urban rail operation
Stray electrical current direct measuring difficulty is larger in ground, and current distribution and stray electrical current distribution trend in ground in urban rail drainage net
Be closer to and its measure difficulty it is relatively small, therefore by measurement urban rail drainage net current signal analyze to obtain it is spuious in ground
Current distribution.Specific practice is the urban rail drainage net current signal and electric power neutral point of main transformer direct current for measuring multiple monitoring nodes
Current signal converges to background server, and urban rail drainage net electric current is calculated using the monitoring data of multiple monitoring nodes and is supervising
The section regularity of distribution is surveyed, and then derives stray electrical current in ground and couples urban electric power neutral point of main transformer in the monitoring section regularity of distribution
Direct-current component signal synchronizes analysis, studies stray electrical current distribution and urban electric power neutral point of main transformer DC current in ground
Correlation, influence degree of the assessment urban rail stray electrical current to the DC magnetic bias phenomena of urban electric power main transformer.
Synchronous coupling analysis technological difficulties first is that monitoring node and urban electric power in drainage net current monitoring subsystem
Neutral point of main transformer direct current monitoring subsystem accomplishes that time synchronization, this system realize each subsystem using GPS sync identification system
Time synchronization, specific practice are the industrial personal computers in electric power neutral point of main transformer current monitoring subsystem and drainage net monitoring subsystem
It all installs GPS time service module additional, acquires each road signal using GPS system for total system and unified clock signal is provided.
Compared with prior art, the beneficial effects of the present invention are:
One, technology contents are novel.Realize the Simultaneous Monitoring of urban rail stray electrical current and electric power neutral point of main transformer DC current.
Two, scene is realized simple.Measuring device is open-close type Hall current sensor, is arranged in urban rail drainage net cable
Junction and urban electric power neutral point of main transformer earthing bar, do not influence the normal operation of urban rail and urban distribution network.Part is realized simultaneously
Wireless measurement is conducive to device and arranges and recycle.
Three, data information is abundant.The present invention is directed to the electric power main transformer DC magnetic bias phenomena that urban rail stray electrical current may cause
Expansion monitoring, therefore further include not only urban rail stray electrical current distributed intelligence including electric power neutral point of main transformer current data, comprehensive prison
It surveys to assess urban rail stray electrical current to the influence degree of city circuit main transformer DC magnetic bias phenomena.
Four, system extension malleability is high.The present invention design design process in consider the later period further expand exploitation etc. because
Element, in industry control machine platform, there are data communication interfaces, can provide number for the inhibition etc. of later period electric power main transformer mainstream bias phenomenon
According to support.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the overall flow schematic diagram of the embodiment of the present invention
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
Fig. 1 is shown, and a kind of specific embodiment of the invention is, a kind of urban rail tractive power supply system and urban electric power master
Inversion of direct current bias synchronous monitoring system, composition is:
Entire synchronous monitoring system is divided into electric power neutral point of main transformer current monitoring subsystem 1, urban rail drainage net current monitoring
Subsystem 2,3 three subsystems of the subsystem of comprehensive analysis；2 hardware of urban rail drainage net current monitoring subsystem is passed by Hall
Sensor 17/18, signal regulating panel 19/20, data collecting card 21/25, GPRS wireless transport module 29/30, industrial personal computer 31 are successively
It constitutes；1 hardware of electric power neutral point of main transformer current monitoring subsystem is by Hall current sensor 5, signal regulating panel 6, number
11 are successively constituted according to capture card 7, industrial personal computer；3 hardware of simultaneous synthesis analyzing subsystem is made of background server 36.
It is formed according to a kind of urban rail tractive power supply system and urban electric power main transformer mainstream bias synchronous monitoring system, Ke Yishi
Existing following function:
1) acquisition and processing of urban rail drainage net current signal: the connecting cable of drainage net in city rail traffic route
Place installs open-close type Hall current sensor 17/18 additional.The installation of open-close type Hall sensor does not need power failure operation, does not influence city
The normal operation of city's rail traffic.By the collected multichannel urban rail drainage net current analog signal input of open-close type Hall sensor
To signal regulating panel 19/20, become available analog signal after equal proportion enhanced processing, which is input to data acquisition
21/25 card, which passes through low-pass filter circuit 22/26, zero temperature is floatd corrects circuit 23/27, the processing of analog to digital conversion circuit 24/28 becomes
The drainage net current digital signal of AC influence signal is removed, the digital signal is using GPRS wireless transmission 29/30 and receives mould
Block 32 carries out wireless signal transmission, and final multichannel drainage net current digital signal imports industrial personal computer 31, using built in industrial personal computer 31
Hard disk 35 is by the storage of multichannel drainage net current digital signal in case later period and electric power neutral point of main transformer direct-current component number are believed
Number Synchronization Analysis realizes that urban rail drainage net current signal is visual on the spot using industrial personal computer VGA video output interface externally connected with display screen
Change output.Time service is synchronized to each road signal in industrial personal computer GP configuring S time service module 34, guarantees each road drainage net current digital
Signal time is synchronous.
2) acquisition and processing of the neutral point direct current signal of urban electric power main transformer: in the neutral point of urban electric power main transformer
Earthing bar installs open-close type Hall current sensor 5 additional.The installation of open-close type Hall sensor does not need power failure operation, does not influence city
Alternating current advocate become normal operation.The collected transformer neutral point current analog signal of open-close type Hall sensor is input to
Signal regulating panel 6, becomes available analog signal after equal proportion enhanced processing, which is input to the warp of data collecting card 7
Crossing low-pass filtering 8, temperature and zero float amendment 9, the processing of analog/digital conversion 10 becomes removing the transformation of power frequency and high order frequency AC compounent
Device neutral point direct current digital signal, transformer neutral point DC current digital data transmission utilize work into industrial personal computer 11
11 built-in hard disk 14 of control machine is by the storage of transformer neutral point DC current component digital signals in case later period and urban rail drainage net electricity
Streaming digital signal Synchronization Analysis realizes urban electric power neutral point of main transformer using industrial personal computer VGA video output interface externally connected with display screen
Current signal and its DC component signal visualize output on the spot.To guarantee electric power neutral point of main transformer current signal and each road urban rail
Drainage net current signal is synchronous, in industrial personal computer GP configuring S time service module 12 to each electric power neutral point of main transformer current signal and its straight
Flow component signal synchronizes time service.
3) impact analysis of the urban rail tractive power supply system to urban electric power main transformer D.C. magnetic biasing: as caused by urban rail operation
Stray electrical current direct measuring difficulty is larger in ground, and current distribution and stray electrical current distribution trend in ground in urban rail drainage net
Be closer to and its measure difficulty it is relatively small, therefore by measurement urban rail drainage net current signal analyze to obtain it is spuious in ground
Current distribution.Specific practice is the urban rail drainage net current signal and electric power neutral point of main transformer direct current for measuring multiple monitoring nodes
Current signal converges to background server 36, and urban rail drainage net electric current is calculated using the monitoring data of multiple monitoring nodes and exists
The section regularity of distribution is monitored, and then derives stray electrical current in ground and it is neutral to couple urban electric power main transformer in the monitoring section regularity of distribution
Point direct-current component signal synchronizes analysis, studies stray electrical current distribution and urban electric power neutral point of main transformer direct current in ground
Flow correlation, influence degree of the assessment urban rail stray electrical current to the DC magnetic bias phenomena of urban electric power main transformer.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (4)
1. urban rail tractive power supply system and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system, which is characterized in that including urban rail
Three drainage net current monitoring subsystem, electric power neutral point of main transformer current monitoring subsystem, simultaneous synthesis analyzing subsystem subsystems
System；The urban rail drainage net current monitoring subsystem hardware is by Hall sensor, signal regulating panel, data collecting card, GPRS
Wireless transport module, industrial personal computer mutually carry out data transmission；The electric power neutral point of main transformer current monitoring subsystem hardware by
Hall current sensor, signal regulating panel, data collecting card, industrial personal computer mutually carry out data transmission；The simultaneous synthesis point
It analyses subsystem hardware and provides communication data by background server.
2. urban rail tractive power supply system according to claim 1 and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system,
It is characterized in that, the acquisition of the urban rail drainage net current signal in the urban rail drainage net current monitoring subsystem passes through with processing
It installs open-close type Hall current sensor at the connecting cable of drainage net additional in city rail traffic route, open-close type Hall is passed
The collected multichannel urban rail drainage net current analog signal of sensor is input to signal regulating panel, becomes after equal proportion enhanced processing
Can use analog signal, analog signal be input to data collecting card float by low-pass filter circuit, zero temperature correct circuit, modulus turns
Changing processing of circuit becomes removing the drainage net current digital signal of AC influence signal, which is wirelessly transferred using GPRS
Wireless signal transmission is carried out with receiving module, final multichannel drainage net current digital signal imports industrial personal computer, using in industrial personal computer
Hard disk is set by the storage of multichannel drainage net current digital signal in case later period and electric power neutral point of main transformer direct-current component number are believed
Number Synchronization Analysis realizes that urban rail drainage net current signal is visual on the spot using industrial personal computer VGA video output interface externally connected with display screen
Change output, time service is synchronized to each road signal in industrial personal computer GP configuring S time service module, guarantees each road drainage net current digital letter
Number time synchronization.
3. urban rail tractive power supply system according to claim 1 and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system,
It is characterized in that, the electric power neutral point of main transformer current monitoring subsystem is neutral ground row's installation in urban electric power main transformer
The collected transformer neutral point current analog signal of open-close type Hall sensor is input to by open-close type Hall current sensor
Signal regulating panel, becomes available analog signal after equal proportion enhanced processing, which is input to data collecting card process
Low-pass filtering, temperature and zero float amendment, analog/digital conversion processing become removing power frequency and high order frequency AC compounent transformer it is neutral
Point DC current digital signal, transformer neutral point DC current digital data transmission is into industrial personal computer, using built in industrial personal computer
Hard disk is by the storage of transformer neutral point DC current component digital signals in case later period and urban rail drainage net current digital signal are same
Step analysis, using industrial personal computer VGA video output interface externally connected with display screen realize urban electric power neutral point of main transformer current signal and its
DC component signal visualizes output on the spot, to guarantee that electric power neutral point of main transformer current signal and each road urban rail drainage net electric current are believed
Number synchronization carries out each electric power neutral point of main transformer current signal and its DC component signal in industrial personal computer GP configuring S time service module
Sync identification.
4. urban rail tractive power supply system according to claim 1 and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system,
It is characterized in that, being provided with background server in the simultaneous synthesis analyzing subsystem, carried out at data by background server
Reason, data storage and data are shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197601.0A CN109387680B (en) | 2018-10-15 | 2018-10-15 | Urban rail traction power supply system and urban electric power main transformer direct-current magnetic bias synchronous monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197601.0A CN109387680B (en) | 2018-10-15 | 2018-10-15 | Urban rail traction power supply system and urban electric power main transformer direct-current magnetic bias synchronous monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387680A true CN109387680A (en) | 2019-02-26 |
| CN109387680B CN109387680B (en) | 2020-12-08 |
Family
ID=65427455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811197601.0A Active CN109387680B (en) | 2018-10-15 | 2018-10-15 | Urban rail traction power supply system and urban electric power main transformer direct-current magnetic bias synchronous monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109387680B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389250A (en) * | 2019-07-29 | 2019-10-29 | 武汉新电电气股份有限公司 | A kind of device and method of for transformer D.C. magnetic biasing event early warning |
| CN111693892A (en) * | 2020-05-26 | 2020-09-22 | 广州市扬新技术研究有限责任公司 | Hall element-based method for realizing online monitoring of contact network leakage current |
| CN113709213A (en) * | 2021-08-03 | 2021-11-26 | 国网湖北省电力有限公司电力科学研究院 | DC magnetic bias live detection data synchronization method related to rail transit |
| CN114325044A (en) * | 2021-12-21 | 2022-04-12 | 国网上海市电力公司 | Method and system for judging relevance between direct current bias magnet of transformer substation and direct current fluctuation source of rail transit |
| WO2022083242A1 (en) * | 2020-10-25 | 2022-04-28 | 国网湖北省电力有限公司电力科学研究院 | Method for analyzing association between rail transit and transformer direct-current magnetic bias |
| CN115406961A (en) * | 2022-09-08 | 2022-11-29 | 国网四川省电力公司电力科学研究院 | Cable lead sealing eddy current detection method, detection module and defect detection system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508018A (en) * | 2011-11-10 | 2012-06-20 | 上海电机学院 | Stray current monitoring and protecting device and method |
| JP2014068504A (en) * | 2012-09-27 | 2014-04-17 | Toshiba Corp | Distribution panel and distributed power supply system |
| CN205003207U (en) * | 2015-08-24 | 2016-01-27 | 南京大全自动化科技有限公司 | Subway stray current collector |
| CN205027836U (en) * | 2015-10-08 | 2016-02-10 | 国家电网公司 | Dc magnetic biasing synchronous detection system |
| CN105353200A (en) * | 2015-12-10 | 2016-02-24 | 国网四川省电力公司电力科学研究院 | On-line monitoring system for DC magnetic bias current of transformer |
| CN205920151U (en) * | 2016-07-14 | 2017-02-01 | 南京大全自动化科技有限公司 | Novel metro stray current SCADA system |
| WO2017082730A1 (en) * | 2015-11-11 | 2017-05-18 | Conductis B.V. | Detecting stray currents in electric railway systems |
| CN108256234A (en) * | 2018-01-19 | 2018-07-06 | 中电普瑞电力工程有限公司 | A kind of method and system for being used to assess transformer DC magnetic bias influence |
-
2018
- 2018-10-15 CN CN201811197601.0A patent/CN109387680B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508018A (en) * | 2011-11-10 | 2012-06-20 | 上海电机学院 | Stray current monitoring and protecting device and method |
| JP2014068504A (en) * | 2012-09-27 | 2014-04-17 | Toshiba Corp | Distribution panel and distributed power supply system |
| CN205003207U (en) * | 2015-08-24 | 2016-01-27 | 南京大全自动化科技有限公司 | Subway stray current collector |
| CN205027836U (en) * | 2015-10-08 | 2016-02-10 | 国家电网公司 | Dc magnetic biasing synchronous detection system |
| WO2017082730A1 (en) * | 2015-11-11 | 2017-05-18 | Conductis B.V. | Detecting stray currents in electric railway systems |
| CN105353200A (en) * | 2015-12-10 | 2016-02-24 | 国网四川省电力公司电力科学研究院 | On-line monitoring system for DC magnetic bias current of transformer |
| CN205920151U (en) * | 2016-07-14 | 2017-02-01 | 南京大全自动化科技有限公司 | Novel metro stray current SCADA system |
| CN108256234A (en) * | 2018-01-19 | 2018-07-06 | 中电普瑞电力工程有限公司 | A kind of method and system for being used to assess transformer DC magnetic bias influence |
Non-Patent Citations (4)
| Title |
|---|
| CHEN ZHIGUANG等: "Research of Impact of Stray Current from Urban Rail Transit System on Buried Gas Pipeline", 《ADVANCED MATERIALS RESEARCH》 * |
| 刘味果等: "长沙地铁轨道交通对交流电网的影响及治理措施的研究", 《湖南电力》 * |
| 吴晓文等: "城市轨道交通引起的变压器直流偏磁噪声与振动特性", 《电测与仪表》 * |
| 蔡茂等: "城市地区主变直流偏磁研究与处理", 《电气自动化》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389250A (en) * | 2019-07-29 | 2019-10-29 | 武汉新电电气股份有限公司 | A kind of device and method of for transformer D.C. magnetic biasing event early warning |
| CN111693892A (en) * | 2020-05-26 | 2020-09-22 | 广州市扬新技术研究有限责任公司 | Hall element-based method for realizing online monitoring of contact network leakage current |
| WO2022083242A1 (en) * | 2020-10-25 | 2022-04-28 | 国网湖北省电力有限公司电力科学研究院 | Method for analyzing association between rail transit and transformer direct-current magnetic bias |
| CN113709213A (en) * | 2021-08-03 | 2021-11-26 | 国网湖北省电力有限公司电力科学研究院 | DC magnetic bias live detection data synchronization method related to rail transit |
| CN113709213B (en) * | 2021-08-03 | 2024-07-19 | 国网湖北省电力有限公司电力科学研究院 | Direct-current magnetic bias live detection data synchronization method related to rail transit |
| CN114325044A (en) * | 2021-12-21 | 2022-04-12 | 国网上海市电力公司 | Method and system for judging relevance between direct current bias magnet of transformer substation and direct current fluctuation source of rail transit |
| CN114325044B (en) * | 2021-12-21 | 2023-08-01 | 国网上海市电力公司 | Method and system for judging relevance of direct-current magnetic bias of transformer substation and direct-current fluctuation source of rail transit |
| CN115406961A (en) * | 2022-09-08 | 2022-11-29 | 国网四川省电力公司电力科学研究院 | Cable lead sealing eddy current detection method, detection module and defect detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109387680B (en) | 2020-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109387680A (en) | Urban rail tractive power supply system and urban electric power main transformer D.C. magnetic biasing synchronous monitoring system | |
| CN104299415B (en) | Based on distributed traffic condition detecting system and the method thereof of Bluetooth technology | |
| Quayle et al. | Arterial performance measures with media access control readers: Portland, Oregon, pilot study | |
| US8050879B2 (en) | Phase identification system and method | |
| CN107209220A (en) | Use the fault location of traveling wave | |
| CN102565542A (en) | Capacitive equipment medium loss online monitoring method based on IEC61850-9-2 standard | |
| Liu et al. | Analysis of the monitoring data of geomagnetic storm interference in the electrification system of a high‐speed railway | |
| CN103329451A (en) | Apparatus and method for fault detection and location determination | |
| JPH10206390A (en) | Method for detecting damage of covering of buried steel pipe | |
| CN102175597A (en) | On-line monitoring method of metro stray current corrosion on-line monitoring system | |
| CN207051383U (en) | A kind of intelligent apparatus for avoiding electricity fraudulent | |
| CN112611939B (en) | Fault location system and method for underground cable line | |
| CN108921239A (en) | Duct size information monitoring system based on two dimensional code | |
| CN103064895A (en) | Communication source management system computer generating method based on Geographic Information System (GIS) | |
| CN112550378B (en) | Method, system and storage for mapping positions between track accompanying optical cable and track | |
| Lawanson et al. | Improving power distribution system situational awareness using visual analytics | |
| AU2022301223B2 (en) | Power transmission line fault positioning method, recording medium, and data processing apparatus | |
| CN105259470B (en) | A kind of fault localization system and method based on optical current mutual inductor | |
| NL1029829C2 (en) | Method and system for determining a network structure or layout of at least a part of an electricity transport network. | |
| Ding et al. | A novel fault location algorithm for mixed overhead‐cable transmission system using unsynchronized current data | |
| CN202720307U (en) | Electric power circuit fault traveling wave locating device | |
| CN211206615U (en) | Monitoring device for stray current | |
| CN203311010U (en) | Buried wire cable testing instrument | |
| JP4104341B2 (en) | Accident location system | |
| CN205749925U (en) | A kind of Electromagnetism of Earthquake disturbance observation instrument main frame |
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 |