CN113093053B - Rail potential and stray current real-time monitoring system - Google Patents
Rail potential and stray current real-time monitoring system Download PDFInfo
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- CN113093053B CN113093053B CN202110358876.3A CN202110358876A CN113093053B CN 113093053 B CN113093053 B CN 113093053B CN 202110358876 A CN202110358876 A CN 202110358876A CN 113093053 B CN113093053 B CN 113093053B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention discloses a real-time rail potential and stray current monitoring system which comprises at least two traction stations and a tunnel system, wherein 211 feeder cabinets, 212 feeder cabinets and a rail potential limiting device are arranged in the traction stations, voltage/current transmitters are arranged in the 211 feeder cabinets, 212 feeder cabinets and the rail potential limiting device and are connected with a direct current transmitter DCS100 through a data transmission circuit, the direct current transmitter DCS100 is connected with a first wave recording device TDR100 through the data transmission circuit, the first wave recording device TDR100 is connected with a switch through the data transmission circuit, and the switch is connected with a wireless router and is connected with a cloud end through the wireless router. The background system of the invention can carry out intelligent early warning on abnormal conditions by analyzing data and can also carry out authority management setting on system users, thereby improving the safe operation level of the subway.
Description
Technical Field
The invention belongs to the field of rail potential and stray current monitoring, and particularly relates to a real-time rail potential and stray current monitoring system.
Background
Stray current is current that flows outside of the designed or specified loop, and is also referred to as "stray current". The reason of the stray current is that most of the current returns to the negative pole of the traction substation through the running rail and the return line, but a small part of the current leaks into the subway track bed and surrounding soil media from the position where the insulation between the rail and the ground is poor. Stray currents can corrode running rails and their accessories, destroy reinforced concrete structures, and corrode buried pipelines.
Through monitoring and data processing to rail return current, can realize the more audio-visual monitoring to rail stray current, can discover the weak link of rail leakage and fix a position stray current leakage emergence position, let timely effectual processing of operation personnel to reduce stray current's hidden danger and harm.
Disclosure of Invention
The invention aims to provide a real-time monitoring system for rail potential and stray current, which solves the problems that the stray current corrodes a running rail and accessories thereof, damages a reinforced concrete structure, corrodes a buried pipeline and the like through monitoring and data processing of the return current of a steel rail.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a rail potential and stray current real-time monitoring system comprises at least two traction stations and a tunnel system, wherein 211 feeder cabinets, 212 feeder cabinets and a rail potential limiting device are arranged in the traction stations, voltage/current transmitters are installed in the 211 feeder cabinets, 212 feeder cabinets and the rail potential limiting device and are connected with a direct current transmitter DCS100 through a data transmission circuit, the direct current transmitter DCS100 is connected with a first wave recording device TDR100 through the data transmission circuit, the first wave recording device TDR100 is connected with a switch through the data transmission circuit, and the switch is connected with a wireless router and is connected with a cloud end through the wireless router;
the tunnel system comprises an ascending rail, a descending rail, an upper contact net and a lower contact net, wherein the ascending rail and the lower contact net are respectively connected with the steel rail potential limiting device;
the positive buses in the traction station are connected with the lower contact net, and the negative buses in the traction station are respectively connected with the upper track and the lower track;
the upper rail and the lower rail are respectively provided with at least 3 measuring points, the measuring points of the upper rail correspond to the measuring points of the lower rail one by one, each measuring point is connected with a voltage sensor through a cable, the voltage sensors connected with the measuring points of the upper rail correspond to the voltage sensors connected with the measuring points of the lower rail one by one, the two corresponding voltage sensors are connected with a second wave recording device TDR100, and the second wave recording device is connected with the cloud end through a wireless router;
the traction station is provided with a satellite clock, the first wave recording device TDR100 is connected with a 485 clock port of the satellite clock through an RS485 line, the second wave recording device TDR100 is provided with a photoelectric conversion module, and the photoelectric conversion module is connected with an optical fiber port of the satellite clock through an optical fiber.
Furthermore, the upper rail and the lower rail are steel rails, and the measuring points are welded and fixed on the upper rail or the lower rail.
Furthermore, the upper traveling rail, the lower traveling rail, the upper contact net and the lower contact net are arranged in parallel.
Further, the satellite clock is connected with the antenna through a shielded coaxial cable.
Further, the satellite clock is connected with the GPS/Beidou satellite through the antenna.
Further, the voltage sensor at the measuring point and the second wave recording device TDR100 are installed in a sealed box.
Further, the cloud is connected with a background system.
Compared with the prior art, the invention has the beneficial effects that: the invention can synchronously monitor the rail potential and the stray current in real time by a data acquisition terminal, various data acquisition algorithms of the bottom layer and a stray current evaluation method, and realizes real-time monitoring and statistical analysis of the contact network current, real-time monitoring and statistical analysis of the rail potential, real-time calculation and statistical analysis of negative return current and loss, and stray current evaluation and analysis; the invention can measure the track potential condition of each point in the interval, and can also calculate the stray current condition of each point in the interval; the invention can inquire the data of the maximum value, the minimum value and the occurrence time of the historical value of the collected data, generate a related equipment report and a data report for the data collected by the wave recording device, and support the online management service for the related equipment; the background system can analyze the data and intelligently early warn abnormal conditions, and can also carry out authority management setting on system users, so that the safety operation level of the subway is improved.
Drawings
FIG. 1 is a system diagram and an apparatus layout according to a first embodiment of the present invention;
fig. 2 is a schematic layout diagram of a time synchronization apparatus according to a second embodiment of the present invention.
Reference numerals: the system comprises an a-direct current transmitter DCS100, a b-first wave recording device TDR100, a c-second wave recording device TDR100, a d-wireless router, an e-voltage sensor, an f-211 feeder cabinet, a g-212 feeder cabinet and an h-steel rail potential limiting device.
Detailed Description
The invention is further described with reference to the following figures and examples.
The first embodiment is as follows:
as shown in FIG. 1, the invention relates to a real-time monitoring system for rail potential and stray current, which comprises a traction station A, a traction station B and a tunnel system, wherein 211 feeder cabinets f, 212 feeder cabinets g and a steel rail potential limiting device h are respectively arranged in the traction station A and the traction station B, voltage/current transducers are arranged in the 211 feeder cabinets f, 212 feeder cabinets g and the steel rail potential limiting device h, the voltage/current transducers are connected with a direct current transducer DCS100 a through a data transmission circuit, the direct current transducer DCS100 a is connected with a first wave recording device TDR100B through a data transmission circuit, the first wave recording device TDR100B is connected with a switch through a data transmission circuit, the switch is connected with a wireless router d and is connected with a cloud end through a wireless router d, wherein the switch preferably adopts a TL-SG industrial grade switch of TP-LINK company or other switches with the same brand as the TL-SG2008 industrial grade switch or the switch with the same brand performance, preferentially adopting a 4G/5G traffic card with the traffic of 32G of a mobile company or traffic cards of other operators with equivalent performance to carry out data transmission, and preferentially adopting a wireless router with the model of SLK-E900-LTE of the Seikenak company or a wireless router with other brands with equivalent performance;
the tunnel system comprises an upper rail, a lower rail, an upper contact network and a lower contact network, wherein the upper rail, the lower rail, the upper contact network and the lower contact network are arranged in parallel, and the upper rail and the lower contact network are respectively connected with a steel rail potential limiting device h;
connecting positive buses in a traction station A station and a traction station B station with a lower contact net respectively, and connecting negative buses in the traction station A station and the traction station B station with an upper traveling rail and a lower traveling rail respectively;
the upper rail and the lower rail are respectively provided with three measuring points, the more the number of the measuring points is, the more accurate the measuring result is, the measuring points of the upper rail correspond to the measuring points of the lower rail one by one, the measuring points are fixedly welded on the upper rail or the lower rail, the measuring points are respectively connected with voltage sensors through cables, the voltage sensors e connected with the measuring points of the upper rail correspond to the voltage sensors e connected with the measuring points of the lower rail one by one, the two corresponding voltage sensors are connected with a second wave recording device TDR100 c, and the second wave recording device c is connected with a cloud end through a wireless router d;
the station A of the traction station and the station B of the traction station are respectively provided with a satellite clock, the first wave recording device TDR100 c is connected with a 485 clock tick of the satellite clock through an RS485 line to carry out B code clock tick, the second wave recording device TDR100 c is provided with a photoelectric conversion module, the photoelectric conversion module is connected with an optical fiber tick of the satellite clock in the station B through an optical fiber, and the photoelectric conversion module is used for converting an optical signal into an electric signal and transmitting the electric signal to the second wave recording device TDR100 c to carry out B code clock tick.
The satellite clock is connected with the GPS/Beidou satellite.
The devices at the measuring points are arranged in a sealed box body, and the aim is to perform waterproof and dustproof treatment on the devices such as the voltage sensor e and the second wave recording device TDR100 c.
Layout of the measuring equipment:
voltage/current transmitters in 211 feeder cabinets f and 212 feeder cabinets g and a steel rail potential limiting device h in the traction station A transmit data to a first wave recording device TDR100b through a direct current transmitter DCS100 a, the first wave recording device TDR100b transmits the data to a switch, the switch uploads the data to a cloud end through a wireless router d, and a background analyzes the data by reading the cloud end data; a voltage/current transmitter is installed in a 211 feeder cabinet f, a 212 feeder cabinet g and a steel rail potential limiting device h in a B station of a traction station, data are transmitted to a first wave recording device TDR100B through a direct current transmitter DCS100 a, the data are transmitted to a switch through the first wave recording device TDR100B, the switch uploads the data to a cloud end through a wireless router d, and a background analyzes the data by reading the cloud end data.
3 points are respectively selected as measuring points on an ascending track and a descending track in a tunnel between a station A of a traction station and a station B of the traction station, and the total number of the measuring points is 6. 6 measuring point on the track are through welding at the rail and drawing forth a cable, and the cable is connected to voltage sensor e, and wherein voltage sensor adopts wibo company's model WBV023YB 0's sensor, and voltage sensor is data transmission to second record ripples device TDR100 c, and second record ripples device TDR100 is direct to be uploaded data to the high in the clouds through wireless router d, and the backstage is through reading high in the clouds data and carrying out the analysis to data.
And (3) time synchronization device layout:
a satellite clock is respectively arranged at a station A and a station B of the traction station, an RS485 line is led out from a 485 time-setting port of the satellite clock to carry out B code time setting on first wave recording devices TDR100B in the station A and the station B of the traction station, and in addition, an optical fiber is led out from an optical fiber port of the satellite clock to be led into a second wave recording device TDR100 c in a tunnel. Because the wave recording device TDR100 has no optical port and cannot directly receive optical fiber for time synchronization, a photoelectric conversion module is additionally installed on the second wave recording device TDR100 c in the tunnel to convert an optical signal into an electrical signal for time synchronization of the second wave recording device TDR100 c.
A background system:
for uploading the electric quantity data collected on site to the cloud server, two ways exist:
1. in-station: the network port of the first wave recording device TDR100b is connected to the network port of the switch, and the switch uploads the data to the cloud end through the 4G wireless router;
2. in the tunnel: the second recording device TDR100 c directly uploads the data to the cloud via the 4G/5G wireless router.
For a background system, the data in the station and the data in the track are centralized on one platform for centralized management and unified display. The rail potential and stray current analysis system deployed at the cloud end obtains real-time data in equipment through the Ethernet, the real-time data are stored in a cloud database to generate historical data, and the cloud end system calculates and analyzes the obtained data through a special rail potential and stray current algorithm to obtain the distribution situation of the rail potential and the stray current and provide reference and auxiliary decision for subway operation.
Example two:
the more the number of the measurement points is, the higher the accuracy is, in the second embodiment, 5 measurement points are selected as the measurement, and the measurement accuracy of the stray current is further improved.
As shown in fig. 2, 5 measurement points are respectively arranged on the upper rail and the lower rail, the measurement points of the upper rail correspond to the measurement points of the lower rail one by one, the measurement points are fixed on the upper rail or the lower rail by welding, each measurement point is connected with a voltage sensor by a cable, a voltage sensor e connected with the measurement point of the upper rail corresponds to a voltage sensor e connected with the measurement point of the lower rail one by one, the two corresponding voltage sensors e are connected with a second wave recording device TDR100, and the second wave recording device TDR100 c is connected with a cloud end by a wireless router d;
the station A of the traction station and the station B of the traction station are respectively provided with a satellite clock, the first wave recording device TDR100B is connected with a 485 clock tick of the satellite clock through an RS485 line to carry out B code clock tick, the second wave recording device TDR100 c is provided with a photoelectric conversion module, the photoelectric conversion module is connected with an optical fiber tick of the satellite clock in the station A through an optical fiber, and the photoelectric conversion module is used for converting an optical signal into an electric signal and carrying out B code clock tick for the second wave recording device TDR100 c.
The satellite clock is connected with the antenna through a shielding coaxial cable, and the satellite clock is connected with the GPS/Beidou satellite through the antenna.
Claims (4)
1. A real-time rail potential and stray current monitoring system is characterized by comprising at least two traction stations and a tunnel system, wherein 211 feeder cabinets, 212 feeder cabinets and a steel rail potential limiting device are arranged in the traction stations, voltage/current transmitters are arranged in the 211 feeder cabinets, 212 feeder cabinets and the steel rail potential limiting device and are connected with a direct current transmitter DCS100 through a data transmission circuit, the direct current transmitter DCS100 is connected with a first wave recording device TDR100 through the data transmission circuit, the first wave recording device TDR100 is connected with a switch through the data transmission circuit, and the switch is connected with a wireless router and is connected with a cloud end through the wireless router;
the tunnel system comprises an upper rail, a lower rail, an upper contact net and a lower contact net, wherein the upper rail and the lower contact net are respectively connected with the steel rail potential limiting device;
the positive buses in the traction station are respectively connected with the lower contact net, and the negative buses in the traction station are respectively connected with the upper track and the lower track;
the upper rail and the lower rail are respectively provided with at least 3 measuring points, the measuring points of the upper rail correspond to the measuring points of the lower rail one by one, each measuring point is connected with a voltage sensor through a cable, the voltage sensors connected with the measuring points of the upper rail correspond to the voltage sensors connected with the measuring points of the lower rail one by one, the two corresponding voltage sensors are connected with a second wave recording device TDR100, and the second wave recording device is connected with the cloud end through a wireless router;
a satellite clock is arranged in the traction station, the first wave recording device TDR100 is connected with a 485 clock port of the satellite clock through an RS485 line, a photoelectric conversion module is arranged on the second wave recording device TDR100, and the photoelectric conversion module is connected with an optical fiber port of the satellite clock through an optical fiber;
the upper rail and the lower rail are steel rails, and the measuring points are welded and fixed on the upper rail or the lower rail; the upper and lower rails and the upper and lower contact nets are arranged in parallel;
the satellite clock is connected with the antenna through a shielded coaxial cable.
2. The system as claimed in claim 1, wherein the satellite clock is connected to the GPS/Beidou satellite via an antenna.
3. The system for real-time monitoring of rail potential and stray current according to claim 1, wherein the voltage sensor at the measuring point and the second recorder TDR100 are installed in a sealed box.
4. The system according to claim 1, wherein the cloud is connected to a background system.
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| CN202110358876.3A CN113093053B (en) | 2021-04-02 | 2021-04-02 | Rail potential and stray current real-time monitoring system |
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| CN202110358876.3A CN113093053B (en) | 2021-04-02 | 2021-04-02 | Rail potential and stray current real-time monitoring system |
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| CN114371363A (en) * | 2022-01-06 | 2022-04-19 | 广州市扬新技术研究有限责任公司 | Online monitoring system and method for network cable of rail transit contact network |
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Application publication date: 20210709 Assignee: Guangzhou Building Intelligent Technology Research Co.,Ltd. Assignor: GUANGZHOU YANGXIN TECHNOLOGY RESEARCH Co.,Ltd. Contract record no.: X2023980041307 Denomination of invention: A Real time Monitoring System for Rail Potential and Stray Current Granted publication date: 20220517 License type: Common License Record date: 20230906 |