CN203164356U - Embedded mainboard-based cable fault positioning device - Google Patents
Embedded mainboard-based cable fault positioning device Download PDFInfo
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- CN203164356U CN203164356U CN2013201012187U CN201320101218U CN203164356U CN 203164356 U CN203164356 U CN 203164356U CN 2013201012187 U CN2013201012187 U CN 2013201012187U CN 201320101218 U CN201320101218 U CN 201320101218U CN 203164356 U CN203164356 U CN 203164356U
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- locating device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The utility model discloses an embedded mainboard-based cable fault positioning device which is composed of two parts, i.e., a main station and a terminal. The terminal is mounted inside a cable branch box or a ring main unit, and an input end of the terminal receives phase currents and zero sequence current signals of all cable lines. The terminal comprises the embedded mainboard, an analog quantity converter board card, and a mobile communication module. The embedded mainboard and the analog quantity converter board card are connected through a backboard connecting line and connected with the mobile communication module through an RS232 serial port. The terminal and the main station are connected through mobile communication. The main station is mounted inside a transformer station or a dispatching center and comprises a mobile communication module for receiving signals transmitted by the terminal. The embedded mainboard-based cable fault positioning device is mature in technology and high in reliability.
Description
Technical field
The utility model belongs to a kind of power technology and equipment, is applicable to 6～10kV based on the power distribution network of cable, can quick and precisely locate when being short-circuited fault or singlephase earth fault.
Background technology
China 6～10kV power distribution network extensively adopts the neutral non-effective grounding mode, is called small current neutral grounding system again.The fault of power distribution network comprises short trouble and singlephase earth fault.The feature of these two kinds of faults is different fully, but all must find the trouble spot as early as possible, and this has just proposed fault-location problem.Along with the quickening that urbanization is built, increasing cable replaces overhead transmission line, becomes the main body of distribution line, and cable positioning difficulty than overhead transmission line when breaking down is bigger, and therefore how solving the cable fault orientation problem becomes the on-the-spot focus of paying close attention to.
The cable fault orientation problem is not well solved for a long time, and on-the-spot toward the method for contact at the artificial line walking of employing, artificial line walking has not only expended a large amount of manpower and materials, and has prolonged power off time, influences power supply safety.The scene has two kinds of methods to locate automatically at present, first method is to utilize the method for cable type fault detector, because the fault detector measuring accuracy is limited, so it is better for the short trouble effect that fault current is bigger, but very low for the very little singlephase earth fault locating accuracy of fault current.Second method is that the intelligent switch of built-in CT is installed, utilize reliable external power supply work, though this method can be measured zero-sequence current, the accurate positioning of singlephase earth fault is also better, but invest bigger, only be applicable to the ring main unit that cost is high, can't in the vast cable branch box of quantity, use.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes on the prior art, proposes a kind of at the locating device based on the distribution network failure of cable.The localization of faults quickly and accurately of this locating device, and be applicable to metallic earthing, through arcing ground, through various faults situations such as transition resistance eutral groundings.Locating device can be realized " two is distant " function, has reduced user's investment, and cost performance is higher.
The technical solution of the utility model is as follows:
A kind of cable fault locating device based on embedded main board, this fault locator is made up of main website and two parts of terminal, it is characterized by:
Described terminal is installed in cable branch box or the ring main unit, and its input end receives phase current and the zero sequence current signal of each bar cable line;
Described terminal has comprised embedded main board, analog quantity transducer integrated circuit board and mobile communication module, and described embedded main board is crossed the backboard connecting line with analog quantity converter plate cartoon and linked to each other, and is connected by the RS232 serial ports with mobile communication module;
Described terminal is connected by mobile communication with main website;
Described main website is installed in the transformer station or the dispatching center, has mobile communication module, the signal that receiving terminal sends.
The utility model can also further adopt following optimal technical scheme:
Described terminal also comprises the power supply module of asking for; The power supply module of asking for comprises: current transformer, solar panel, current transformer input protection module, solar panel input protection module, battery management module, lithium battery group, how electric rail power output module; Described current transformer is placed on the cable line, and its secondary side connects current transformer input protection module, battery management module and how electric rail power output module in turn; Described solar panel connects solar panel input protection module, battery management module and lithium battery group in turn.Described terminal utilizes power taking CT and solar panel to obtain working power.Wherein, described lithium battery group can be automotive grade ferric phosphate lithium cell group; Described how electric rail power output module provides+5V ,+12V ,-three voltage rail of 12V, and be connected to the power end of embedded main board, analog quantity transducer integrated circuit board and mobile communication module.
Described embedded main board comprises and is integrated in 32 ARM chips, 64M internal memory, 128MFlash storer, 12 bit AD sample chips, 232/485 serial ports and the USB serial ports that a dominant frequency on the circuit board is 500MHz.The operating system of mainboard is embedded WinCE5.0 system.
Described terminal is supported USB mouse, USB keyboard, USB flash disk.Recorder data can be copied on the USB flash disk.
Described main website is industrial control computer.
Terminal is calculated current amplitude in real time and the result is uploaded to main website during normal the operation, is shown by main website.After the fault that is short-circuited, terminal sends to main website according to the out-of-limit startup warning of phase current with warning message.After singlephase earth fault took place, terminal sent to main website according to the out-of-limit startup warning of zero-sequence current with warning message.Main website adopts and gos deep into first search algorithm according to all terminal information, determines the position of fault section.
Fault locator of the present utility model realizes localization of fault by the following method:
Described terminal is the embedded computer type device that is applicable to outdoor use, is installed in cable branch box or the ring main unit, is used with the phase CT and the zero sequence CT that are installed on each bar circuit.Terminal is made up of embedded main board, power pack integrated circuit board and mobile communication module for measuring phase current and zero sequence current signal and sending failure message to main website.
Described embedded main board comprises and is integrated in 32 ARM chips, 64M internal memory, 128MFlash storer, 12 bit AD sample chips, 232/485 serial ports and the USB serial ports that a dominant frequency on the circuit board is 500MHz.Mainboard is supported USB mouse, USB keyboard, USB flash disk, recorder data can be copied on the USB flash disk.The operating system of mainboard is embedded WinCE5.0 system.
Described terminal has battery pack and discharges and recharges control module, can utilize power taking CT and solar panel to obtain working power.
Described main website is an industrial control computer, is installed in the transformer station or the dispatching center, is used for the information of receiving terminal and carries out the localization of fault computing, has mobile communication module.
Terminal is calculated current amplitude in real time and the result is uploaded to main website during normal the operation, is shown by main website.After the fault that is short-circuited, terminal sends to main website according to the out-of-limit startup warning of phase current with warning message.After singlephase earth fault took place, terminal sent to main website according to the out-of-limit startup warning of zero-sequence current with warning message.Main website adopts and gos deep into first search algorithm according to all terminal information, determines the position of fault section.
Advantage of the present utility model is as follows:
1, measuring accuracy height can accurately be measured phase current and zero-sequence current, and precision reaches more than 0.5 grade.
2, can accurately determine short trouble and singlephase earth fault place section.
3, need not to insert from the outside conventional power source, by the electricity work that realizes asking for of line current and solar panel.
4, technology maturation, reliability height are applicable to the power distribution network of 6～10kV isolated neutral or neutral by arc extinction coil grounding, are applicable to metallic earthing, through arcing ground, through various faults situations such as transition resistance eutral groundings.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the schematic diagram of terminal;
Fig. 3 is the schematic diagram of embedded main board;
Fig. 4 is the schematic diagram that discharges and recharges control module.
Embodiment
, the technical solution of the utility model is described in further detail by specific embodiment as figure below in conjunction with instructions.
The utility model proposes a kind of at the locating device based on the distribution network failure of cable.The localization of faults quickly and accurately of this locating device, and be applicable to metallic earthing, through arcing ground, through various faults situations such as transition resistance eutral groundings.When the fault post-positioning device that is short-circuited is determined fault section according to phase current information, after singlephase earth fault took place, locating device was determined fault section according to zero-sequence current information.Locating device can be realized " two is distant " function, and warning message is uploaded to main website.
Locating device based on the utility model development is made up of main website and two parts of terminal.Described terminal is the embedded computer type device that is applicable to outdoor use, is installed in cable branch box or the ring main unit, is used with the phase CT and the zero sequence CT that are installed on each bar circuit.Terminal is made up of embedded main board, power pack integrated circuit board and mobile communication module for measuring phase current and zero sequence current signal and sending failure message to main website.
Described embedded main board comprises and is integrated in 32 ARM chips, 64M internal memory, 128MFlash storer, 12 bit AD sample chips, 232/485 serial ports and the USB serial ports that a dominant frequency on the circuit board is 500MHz.Mainboard is supported USB mouse, USB keyboard, USB flash disk, recorder data can be copied on the USB flash disk.The operating system of mainboard is embedded WinCE5.0 system.
Described terminal has the power supply module of asking for, and can utilize power taking CT and solar panel to obtain working power.
Described main website is an industrial control computer, is installed in the transformer station or the dispatching center, is used for the information of receiving terminal and carries out the localization of fault computing, has mobile communication module.
Terminal is calculated current amplitude in real time and the result is uploaded to main website during normal the operation, is shown by main website.After the fault that is short-circuited, terminal sends to main website according to the out-of-limit startup warning of phase current with warning message.After singlephase earth fault took place, terminal sent to main website according to the out-of-limit startup warning of zero-sequence current with warning message.Main website adopts and gos deep into first search algorithm according to all terminal information, determines the position of fault section.
Structure of the present utility model as shown in Figure 1, two of locating device terminal and main websites part is formed.The current transformer C(of each bar cable line is because more than one of the quantity of check point, and the branched line at each check point place is more than one, therefore article one branched line CT of first check point is expressed as C-1-1, the second branched line CT of first check point is expressed as C-1-2, All other routes are by that analogy) the secondary analog current signal be linked into terminal B(because more than one of the quantity of check point, a plurality of terminals are used B-1, B-2 respectively ... B-n represents).Terminal is the embedded computer type device that is applicable to outdoor use, is installed in cable branch box or the ring main unit, is used with the phase CT and the zero sequence CT that are installed on each bar circuit.Terminal is made up of embedded main board, power pack integrated circuit board, mobile communication module for measuring phase current and zero sequence current signal and sending failure message to main website.Main website is an industrial control computer, is installed in the transformer station or the dispatching center, is used for the information of receiving terminal and carries out the localization of fault computing, has mobile communication module.
The principle of terminal as shown in Figure 2, terminal comprises analog quantity transducer integrated circuit board K1, embedded main board K2 and mobile communication module K3, three integrated circuit boards connect by backboard B.By secondary cable the current analog signal of current transformer is inserted analog quantity transducer integrated circuit board, A1 to An represents the power converter cells on the integrated circuit board, can be with current transitions-5V and+low pressure analog signals between the 5V.Conversion became digital signal through AD after analog quantity after the conversion entered embedded main board, the digital signal of CPU is calculated and is judged whether to break down, preserve fault data immediately if break down, and by the RS232 serial ports warning message being sent to mobile communication module, mobile communication module uploads to main website with warning message by the GPRS mode.
The principle of embedded main board as shown in Figure 3, described embedded main board comprises and is integrated in 32 ARM chips, 64M internal memory, 128MFlash storer, 12 bit AD sample chips, 232/485 serial ports and the USB serial ports that a dominant frequency on the circuit board is 500MHz.The operating system of mainboard is embedded WinCE5.0 system.Embedded main board is made up of CPU, FLASH, NAND FLASH, SDRAM, FPGA, CPU is PXA270C520, by DATA bus mouth output data bus BD0---BD15, by ADDR bus mouth OPADD bus AD0-AD25, SDRAM is MT48LC16, the corresponding connection with address bus of A0---A12 on the MT48LC16, the corresponding connection with data bus of the DQ0---DQ15 on the MT48LC16; FLASH is JS28F128, the corresponding connection with address bus of the A0---A24 on the JS28F128, the corresponding connection with data bus of the DQ0---DQ15 on the JS28F128; NAND FLASH is K9F4G08, the corresponding connection with address bus of the ALE on the K9F4G08, and the corresponding connection with data bus of the IO0---IO7 on the K9F4G08 is used for control GPRS communication; FPGA is EP3C5F256, the corresponding connection with address bus of the IO_VB6 on the EP3C5F256, the corresponding connection with data bus of the IO_VB5 on the EP3C5F256.
Discharge and recharge the principle of control module as shown in Figure 4, the whole charging and discharging system is made up of special current transformer X, solar panel Y, current transformer input protection modules A, solar panel input protection module C, PowerPath and battery management module B, automotive grade ferric phosphate lithium cell group E, how electric rail power output module D.Wherein special current transformer X can adjust parameter to satisfy the operation demand of different power consumption equipment under the different load condition circuit in than relative broad range, solar panel Y and special current transformer X are redundant each other under the prerequisite that can independently support to move, so that the system's steadiness under complicated circuit service condition and the complicated operation field condition to be provided.Current transformer input protection modules A and solar panel input protection module C are responsible for taking place to provide protection for late-class circuit under the situation of concussion or big dash current, induction thunder at circuit.PowerPath and battery management module B to battery or load, again with the energy of battery offer load under the situation that not have to import at front end with the front end of wide region input energy distribution.Automotive grade ferric phosphate lithium cell group E can provide 1000 complete dashing to put the cycle entirely with the energy density near 3 times of lead-acid accumulators under subzero 20 to 80 degrees centigrade environment temperature.Many electric rail power output module D with surpass after the specified output 20% near 90% high-level efficiency serve as a back level load provide+5V ,+12V ,-three voltage rail of 12V.
Claims (6)
1. cable fault locating device based on embedded main board, this fault locator is made up of main website and two parts of terminal, it is characterized by:
Described terminal is installed in cable branch box or the ring main unit, and its input end receives phase current and the zero sequence current signal of each bar cable line;
Described terminal has comprised embedded main board, analog quantity transducer integrated circuit board and mobile communication module, and described embedded main board is crossed the backboard connecting line with analog quantity converter plate cartoon and linked to each other, and is connected by the RS232 serial ports with mobile communication module;
Described terminal is connected by mobile communication with main website;
Described main website is installed in the transformer station or the dispatching center, has mobile communication module, the signal that receiving terminal sends.
2. cable fault locating device according to claim 1 is characterized in that:
Described terminal also comprises the power supply module of asking for;
The described power supply module of asking for comprises: current transformer, solar panel, current transformer input protection module, solar panel input protection module, battery management module, lithium battery group, how electric rail power output module;
Described current transformer is placed on the cable line, and its secondary side connects current transformer input protection module, battery management module and how electric rail power output module in turn; Described solar panel connects solar panel input protection module, battery management module and lithium battery group in turn.
3. cable fault locating device according to claim 2 is characterized in that:
Described lithium battery group is automotive grade ferric phosphate lithium cell group;
Described how electric rail power output module provides+5V ,+12V ,-three voltage rail of 12V, and be connected to the power end of embedded main board, analog quantity transducer integrated circuit board and mobile communication module.
4. cable fault locating device according to claim 1 is characterized in that:
Described embedded main board comprises and is integrated in 32 ARM chips, 64M internal memory, 128MFlash storer, 12 bit AD sample chips, 232/485 serial ports and the USB serial ports that a dominant frequency on the circuit board is 500MHz.
5. cable fault locating device according to claim 1 is characterized in that:
Described terminal is supported USB mouse, USB keyboard, USB flash disk.
6. cable fault locating device according to claim 1 is characterized in that:
Described main website is industrial control computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201012187U CN203164356U (en) | 2013-03-06 | 2013-03-06 | Embedded mainboard-based cable fault positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201012187U CN203164356U (en) | 2013-03-06 | 2013-03-06 | Embedded mainboard-based cable fault positioning device |
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| CN203164356U true CN203164356U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013201012187U Expired - Lifetime CN203164356U (en) | 2013-03-06 | 2013-03-06 | Embedded mainboard-based cable fault positioning device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472356A (en) * | 2013-10-12 | 2013-12-25 | 长沙威胜信息技术有限公司 | Cable type fault detector |
| CN104578011A (en) * | 2015-01-27 | 2015-04-29 | 国家电网公司 | Cable line fault isolation method, device and system |
| CN106849076A (en) * | 2017-04-14 | 2017-06-13 | 国网宁夏电力公司银川供电公司 | Earth fault alignment alarm type mobile substation |
| CN108627738A (en) * | 2017-03-16 | 2018-10-09 | 宝钢特钢有限公司 | A kind of on-Line Monitor Device and monitoring method for monitoring electroslag furnace water-cooled cable |
| CN113253057A (en) * | 2021-06-21 | 2021-08-13 | 广东电网有限责任公司佛山供电局 | Automatic fault finding method for overhead transmission line |
-
2013
- 2013-03-06 CN CN2013201012187U patent/CN203164356U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472356A (en) * | 2013-10-12 | 2013-12-25 | 长沙威胜信息技术有限公司 | Cable type fault detector |
| CN104578011A (en) * | 2015-01-27 | 2015-04-29 | 国家电网公司 | Cable line fault isolation method, device and system |
| CN108627738A (en) * | 2017-03-16 | 2018-10-09 | 宝钢特钢有限公司 | A kind of on-Line Monitor Device and monitoring method for monitoring electroslag furnace water-cooled cable |
| CN106849076A (en) * | 2017-04-14 | 2017-06-13 | 国网宁夏电力公司银川供电公司 | Earth fault alignment alarm type mobile substation |
| CN106849076B (en) * | 2017-04-14 | 2023-06-23 | 国网宁夏电力有限公司银川供电公司 | Ground fault routing alarm type mobile substation |
| CN113253057A (en) * | 2021-06-21 | 2021-08-13 | 广东电网有限责任公司佛山供电局 | Automatic fault finding method for overhead transmission line |
| CN113253057B (en) * | 2021-06-21 | 2021-09-17 | 广东电网有限责任公司佛山供电局 | Automatic fault finding method for overhead transmission line |
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Granted publication date: 20130828 |
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| CX01 | Expiry of patent term |