CN218455761U - Traveling wave grounding fault studying and judging device - Google Patents
Traveling wave grounding fault studying and judging device Download PDFInfo
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- CN218455761U CN218455761U CN202222435852.6U CN202222435852U CN218455761U CN 218455761 U CN218455761 U CN 218455761U CN 202222435852 U CN202222435852 U CN 202222435852U CN 218455761 U CN218455761 U CN 218455761U
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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
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Abstract
The application relates to a traveling wave ground fault studying and judging device, and belongs to the technical field of power grid monitoring. The method comprises the following steps: the signal adapter plate is connected with a mixed signal input interface used for being connected with the column switch, and a traveling wave detection sensor is arranged on a current transmission line between the mixed signal input interface and the signal adapter plate; the mainboard comprises a signal processing module and a microprocessor which are connected with each other, the signal processing module is connected with the traveling wave detection sensor, and the microprocessor is connected with a communication module which is communicated with a main station. The traveling wave ground fault studying and judging device can utilize the traveling wave detection sensor to collect power frequency signals and traveling wave signals under the condition that the normal work of an original switch of a line is not influenced, and the accurate judgment of fault types and the accurate positioning of fault points are realized through the main board and the main station. The single-phase earth fault handling capacity of the switch is improved, the fault finding efficiency of operation and maintenance personnel is improved, and the power failure time of a line is reduced.
Description
Technical Field
The application relates to the technical field of power grid monitoring, in particular to a traveling wave ground fault studying and judging device.
Background
With the rapid development of economy and the acceleration of city construction process in China, the requirement of power consumers on the quality of electric energy is increasingly improved. The power distribution network is located at the tail end of the power system, the operation environment is complex, the influence of natural and human factors is large, and large-area power failure often occurs. Therefore, the power department deploys a large number of primary and secondary fusion switch devices on the line to quickly isolate the fault section, recover the normal power supply of the non-fault section, reduce the fault influence range of the distribution line and improve the power supply reliability.
However, considering that the earth fault of the power distribution network occurs frequently, in order to prevent the switch from frequently acting, most switches only have the earth fault warning function and do not have the earth protection function, so that the earth fault interval cannot be judged, and the effective isolation of the earth fault cannot be realized. Meanwhile, the fault isolation interval is too large due to the fact that a large number of primary and secondary fusion switches cannot be configured on a line under the limitation of a setting value of a main trunk outlet switch, specific fault points still need to be manually checked, time and labor are wasted in the process, and the reliability of line power supply is seriously affected.
Disclosure of Invention
The embodiment of the application provides a traveling wave ground fault studying and judging device to solve the problem that the power distribution network in the related art cannot judge the ground fault interval and cannot realize effective isolation of the ground fault.
The embodiment of the application provides a traveling wave ground fault studies and judges device includes:
the signal adapter plate is connected with a mixed signal input interface used for being connected with the column switch, and a traveling wave detection sensor is arranged on a current transmission line between the mixed signal input interface and the signal adapter plate;
the main board comprises a signal processing module and a microprocessor which are connected with each other, the signal processing module is connected with the traveling wave detection sensor, and the microprocessor is connected with a communication module which is communicated with a main station.
In some embodiments: the traveling wave detection sensor is a Rogowski coil sensor which is sleeved on a current transmission line between the mixed signal input interface and the signal adapter plate.
In some embodiments: the traveling wave detection sensor comprises a power frequency current sensor and a traveling wave current sensor, and the power frequency current sensor and the traveling wave current sensor are sleeved on a current transmission line between the mixed signal input interface and the signal adapter plate.
In some embodiments: the signal adapter board is provided with a voltage interface connected with the microprocessor and a power interface connected with the mainboard and supplying power to the mainboard.
In some embodiments: the signal adapter plate is also provided with a mixed signal output port, and the mixed signal output port is connected with a current output interface, a control signal output interface, a power supply and a voltage output interface which are connected with the power distribution switch monitoring terminal.
In some embodiments: the mixed signal input interface, the current output interface, the control signal output interface, the power supply and the voltage output interface are all aviation plugs.
In some embodiments: the mainboard further comprises a GPS time synchronization module connected with the microprocessor.
In some embodiments: the signal adapter board is arranged on the main board, and the signal adapter board is arranged on the main board.
In some embodiments: the communication module is a GPRS communication module.
In some embodiments: the microprocessor is an ARM microprocessor.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a traveling wave ground fault studying and judging device, and the traveling wave ground fault studying and judging device is provided with a signal adapter plate, the signal adapter plate is connected with a mixed signal input interface used for being connected with an on-column switch, and a traveling wave detection sensor is arranged on a current transmission line between the mixed signal input interface and the signal adapter plate. The mainboard comprises a signal processing module and a microprocessor which are connected with each other, the signal processing module is connected with the traveling wave detection sensor, and the microprocessor is connected with a communication module communicated with the master station.
Therefore, the traveling wave ground fault studying and judging device can utilize the traveling wave detection sensor to collect power frequency signals and traveling wave signals without influencing the normal work of the original switch of the line, and the accurate judgment of fault types and the accurate positioning of fault points are realized. The single-phase earth fault handling capacity of the switch is improved, the fault finding efficiency of operation and maintenance personnel is improved, and the power failure time of a line is reduced. And need not to change new switch and disassemble distribution switch monitor terminal inner structure, can realize the accurate positioning of fault point through adding this device, help fortune dimension personnel to keep apart earth fault fast, improve the trouble-shooting efficiency by a wide margin, promote the line power supply reliability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view illustrating a usage status of a traveling wave ground fault investigation device according to an embodiment of the present application;
fig. 2 is a schematic diagram of an internal structure of a traveling wave ground fault studying and judging device according to an embodiment of the present application;
fig. 3 is a block diagram of a traveling wave ground fault studying and judging device according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a traveling wave ground fault investigation device according to another embodiment of the present application.
Reference numerals are as follows:
1. a traveling wave grounding fault studying and judging device; 2. a power distribution switch monitoring terminal; 3. a pole-mounted switch; 4. a signal transfer board; 5. a main board; 6. a mixed signal input interface; 7. a current output interface; 8. a control signal output interface; 9. a power supply and voltage output interface; 10. a traveling wave detection sensor; 11. a voltage interface; 12. a power interface; 13. a mixed signal output port; 14. a microprocessor; 15. a communication module; 16. a GPS time synchronization module; 17. and a signal processing module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a traveling wave ground fault study and judge device, and it can solve the distribution network among the correlation technique and can't judge the ground fault interval, can't realize the problem of ground fault's effective isolation.
Referring to fig. 1 to 4, an embodiment of the present application provides a traveling wave ground fault studying and judging device, where the traveling wave ground fault studying and judging device 1 includes:
the signal adapter plate 4 is connected with a mixed signal input interface 6 used for being connected with the pole-mounted switch 3, and the mixed signal input interface 6 is electrically connected with a signal output interface of the pole-mounted switch 3 on the pole tower through a cable. The column switch 3 collects line voltage, current and power supply signals through a voltage transformer (PT) and a Current Transformer (CT), and sends the signals to a signal transfer board 4 of the traveling wave grounding fault studying and judging device 1 through a cable. Meanwhile, the transmitted signals also comprise the operation state quantity of the column switch 3 and control signals.
In the traveling wave ground fault studying and judging device 1, the mixed signal input interface 6 is electrically connected with the signal adapter plate 4, and all signals received by the mixed signal input interface 6 are transmitted into the signal adapter plate 4 through the signal transmission line. A traveling wave detection sensor 10 is arranged on a current transmission line between the mixed signal input interface 6 and the signal adapter plate 4, and the traveling wave detection sensor 10 is used for acquiring a power frequency signal and a traveling wave signal; and the accurate judgment of the fault type and the accurate positioning of the fault point can be realized by utilizing the power frequency signal and the traveling wave signal.
The main board 5, this main board 5 includes interconnect's signal processing module 17 and microprocessor 14, and signal processing module 17 is connected with travelling wave detection sensor 10, and signal processing module 17 is arranged in extracting power frequency signal and travelling wave signal in the electric current signal. The microprocessor 14 is connected to a communication module 15 for communicating with the master station, the communication module 15 is preferably a GPRS communication module, and the microprocessor 14 is preferably an ARM microprocessor. The microprocessor 14 receives and processes the power frequency signal and the traveling wave signal extracted by the signal processing module 17, judges whether the line has a fault according to the obtained power frequency signal and the traveling wave signal, and sends the power frequency current signal, the traveling wave current signal and the voltage signal to the master station through the communication module 15 in a 4G or 5G mode if the line has a fault.
The traveling wave ground fault studying and judging device 1 of the embodiment of the application can utilize the traveling wave detection sensor 10 to collect power frequency signals and traveling wave signals under the condition that the original switch of a line normally works, and accurate judgment of fault types and accurate positioning of fault points are achieved through the mainboard 5. The single-phase earth fault handling capacity of the switch is improved, the fault finding efficiency of operation and maintenance personnel is improved, and the line power failure time is reduced. And need not to change new switch and disassemble distribution switch monitor terminal inner structure, can realize the accurate positioning of fault point through adding this device, help fortune dimension personnel to keep apart earth fault fast, improve the troubleshooting efficiency by a wide margin, promote the circuit power supply reliability.
In some alternative embodiments: referring to fig. 3 and 4, the present embodiment provides a traveling wave ground fault study and judgment apparatus, in which the traveling wave detection sensor 10 of the traveling wave ground fault study and judgment apparatus 1 is a rogowski coil sensor, and the rogowski coil sensor is sleeved on a current transmission line between the mixed signal input interface 6 and the signal adapting board 4. The current signal required by the traveling wave grounding fault studying and judging device 1 is obtained by sleeving the Rogowski coil sensor on a current transmission line between the mixed signal input interface 6 and the signal adapter plate 4 through induction. Rogowski coil sensor is connected with signal processing module 17 electricity in mainboard 5, and signal processing module 17 is used for drawing power frequency current and the high frequency travelling wave current of Rogowski coil sensor induction.
In order to increase the bandwidth of the measurement signal, the traveling wave detection sensor 10 shown in fig. 4 includes a power frequency current sensor and a traveling wave current sensor, and the power frequency current sensor and the traveling wave current sensor are sleeved on a current transmission line between the mixed signal input interface 6 and the signal adapter plate 4. The power frequency current sensor and the traveling wave current sensor respectively measure power frequency current and traveling wave current. The power frequency current sensor and the traveling wave current sensor are connected with the signal processing module 17, and at this time, the signal processing module 17 is only used for amplifying and A/D converting the power frequency current and the traveling wave current.
In some alternative embodiments: referring to fig. 2 to 4, the present embodiment provides a traveling wave ground fault studying and judging device, in which the signal adapting board 4 of the traveling wave ground fault studying and judging device 1 is provided with a voltage interface 11 connected with a microprocessor 14, and a power interface 12 connected with the motherboard 5 and supplying power to the motherboard 5. The signal adapter plate 4 is also provided with a mixed signal output port 13, and the mixed signal output port 13 is connected with a current output interface 7, a control signal output interface 8 and a power supply and voltage output interface 9 which are connected with the power distribution switch monitoring terminal 2. The mixed signal input interface 6, the current output interface 7, the control signal output interface 8 and the power supply and voltage output interface 9 are all aviation plugs.
In the embodiment of the application, the voltage signal and the power signal are transmitted in two paths in the signal adapter plate 4, one path of voltage signal is transmitted to the microprocessor 14 of the main board 5 through the voltage interface 11 on the signal adapter plate 4, and the other path of voltage signal is connected to the power and voltage output interface 9 through the mixed signal output port 13 on the signal adapter plate 4 through the transmission line. One path of power supply signal is transmitted into the main board 5 through the power supply interface 12 on the signal adapter board 4 to provide electric energy for the microprocessor 14, the communication module 15, the GPS time synchronization module 16 and the signal processing module 17 in the main board 5.
The other power signal is connected to the power and voltage output interface 9 through a transmission line through a mixed signal output port 13 on the signal adapter plate 4. The operation state quantity of the column switch 3 and the control signal are directly connected to the control signal output interface 8 through the mixed signal output port 13 via transmission lines. The current signal of the pole-mounted switch 3 is directly connected to the current output interface 7 through the mixed signal output port 13 through a transmission line. The current output interface 7, the control signal output interface 8, the power supply and voltage output interface 9 are electrically connected with corresponding ports on the power distribution switch monitoring terminal 2, and the power distribution switch monitoring terminal 2 is an FTU.
The signal transmission mode of the traveling wave ground fault studying and judging device 1 in the embodiment of the application is that after a line signal is measured by the column switch 3, the column switch is firstly connected with the traveling wave ground fault studying and judging device 1 through the mixed signal input interface 6, and then data is transmitted to the power distribution switch monitoring terminal 2 through the current output interface 7, the control signal output interface 8 and the power supply and voltage output interface 9 after passing through the signal adapter plate 4. The method is characterized in that a current signal acquired by the main board 5 is acquired by sleeving the traveling wave detection sensor 10 on a current transmission line between the mixed signal input interface 6 and the signal adapter plate 4 in an induction manner, and electric energy and voltage signals required by the traveling wave ground fault studying and judging device 1 are directly acquired by the signal adapter plate 4. The connection mode can not affect the operation of the power distribution switch monitoring terminal.
In some alternative embodiments: referring to fig. 1 to 4, the present embodiment provides a traveling wave ground fault studying and judging device, the main board 5 of the traveling wave ground fault studying and judging device 1 further includes a GPS time synchronization module 16 connected to the microprocessor 14, the GPS time synchronization module 16 is used to accurately record the time when the event in the accident occurs and the time when the traveling wave generated by the fault point reaches the equipment, and meanwhile, it is ensured that there is no time difference between the equipments on the line. The traveling wave ground fault studying and judging device 1 further comprises a case for accommodating the signal adapter plate 4 and the main board 5, wherein the case comprises a case body and a door plate for opening and closing the case body. The case is used for protecting the signal adapter board 4 and the main board 5 so that the case can be used outdoors for a long time. The mixed signal input interface 6, the current output interface 7, the control signal output interface 8 and the power supply and voltage output interface 9 are arranged at the bottom of the box body.
Principle of operation
The embodiment of the application provides a traveling wave ground fault studying and judging device, and as the traveling wave ground fault studying and judging device 1 is provided with a signal adapter plate 4, the signal adapter plate 4 is provided with a mixed signal input interface 6 connected with a column switch 3, and a traveling wave detection sensor 10 is arranged on a current transmission line between the mixed signal input interface 6 and the signal adapter plate 4. Mainboard 5, this mainboard 5 includes interconnect's signal processing module 17 and microprocessor 14, and signal processing module 17 is connected with travelling wave detection sensor 10, and microprocessor 14 is connected with the communication module 15 with main website communication.
Therefore, the traveling wave ground fault studying and judging device 1 can utilize the traveling wave detection sensor 10 to collect power frequency signals and traveling wave signals under the condition that the normal work of the original switch of the line is not influenced, and the accurate judgment of the fault type and the accurate positioning of the fault point are realized. The single-phase earth fault handling capacity of the switch is improved, the fault finding efficiency of operation and maintenance personnel is improved, and the line power failure time is reduced. And need not to change new switch and disassemble distribution switch monitor terminal inner structure, can realize the accurate positioning of fault point through adding this device, help fortune dimension personnel to keep apart earth fault fast, improve the troubleshooting efficiency by a wide margin, promote the circuit power supply reliability.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A traveling wave ground fault studying and judging device is characterized by comprising:
the device comprises a signal adapter plate (4), wherein the signal adapter plate (4) is connected with a mixed signal input interface (6) used for being connected with a column switch (3), and a traveling wave detection sensor (10) is arranged on a current transmission line between the mixed signal input interface (6) and the signal adapter plate (4);
mainboard (5), mainboard (5) are including interconnect's signal processing module (17) and microprocessor (14), signal processing module (17) are connected with travelling wave detection sensor (10), microprocessor (14) are connected with communication module (15) with the communication of main website.
2. The traveling wave ground fault studying and judging device according to claim 1, wherein:
the traveling wave detection sensor (10) is a Rogowski coil sensor which is sleeved on a current transmission line between the mixed signal input interface (6) and the signal adapter plate (4).
3. The traveling wave ground fault studying and judging device according to claim 1, wherein:
the traveling wave detection sensor (10) comprises a power frequency current sensor and a traveling wave current sensor, and the power frequency current sensor and the traveling wave current sensor are sleeved on a current transmission line between the mixed signal input interface (6) and the signal adapter plate (4).
4. The traveling wave ground fault studying and judging device according to claim 1, wherein:
the signal adapter plate (4) is provided with a voltage interface (11) connected with the microprocessor (14) and a power interface (12) connected with the mainboard (5) and used for supplying power to the mainboard (5).
5. A traveling wave ground fault studying and judging device according to claim 1 or 4, wherein:
the signal adapter plate (4) is further provided with a mixed signal output port (13), and the mixed signal output port (13) is connected with a current output interface (7) connected with the power distribution switch monitoring terminal (2), a control signal output interface (8) and a power supply and voltage output interface (9).
6. The traveling wave ground fault studying and judging device as claimed in claim 5, wherein:
the mixed signal input interface (6), the current output interface (7), the control signal output interface (8) and the power supply and voltage output interface (9) are all aviation plugs.
7. The traveling wave ground fault studying and judging device according to claim 1, wherein:
the mainboard (5) further comprises a GPS time tick module (16) connected with the microprocessor (14).
8. The traveling wave ground fault studying and judging device according to claim 1, wherein:
the signal adapter board (4) and the main board (5) are contained in the case, and the case comprises a case body and a door plate for opening and closing the case body.
9. The traveling wave ground fault studying and judging device according to claim 1, wherein:
the communication module (15) is a GPRS communication module.
10. The traveling wave ground fault studying and judging device as claimed in claim 1, wherein:
the microprocessor (14) is an ARM microprocessor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222435852.6U CN218455761U (en) | 2022-09-14 | 2022-09-14 | Traveling wave grounding fault studying and judging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222435852.6U CN218455761U (en) | 2022-09-14 | 2022-09-14 | Traveling wave grounding fault studying and judging device |
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| CN218455761U true CN218455761U (en) | 2023-02-07 |
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| CN202222435852.6U Active CN218455761U (en) | 2022-09-14 | 2022-09-14 | Traveling wave grounding fault studying and judging device |
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Address after: 430223 No. 8, floor 24, unit 07, podium building, phase II R & D building, laser engineering design headquarters, No. 3, Guanggu Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: Wuhan Three Phase Electrical Co.,Ltd. Address before: 430223 No. 8, floor 24, unit 07, podium building, phase II R & D building, laser engineering design headquarters, No. 3, Guanggu Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee before: Wuhan pinxun Technology Co.,Ltd. |
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