CN211786026U - Intelligent grounding monitoring device - Google Patents
Intelligent grounding monitoring device Download PDFInfo
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- CN211786026U CN211786026U CN201922211649.9U CN201922211649U CN211786026U CN 211786026 U CN211786026 U CN 211786026U CN 201922211649 U CN201922211649 U CN 201922211649U CN 211786026 U CN211786026 U CN 211786026U
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Abstract
The utility model discloses an intelligence ground connection monitoring devices, include: the device comprises a shell, a monitoring main control board arranged in the shell, and a high-precision overvoltage, overcurrent and leakage current three-in-one sensor electrically connected with the monitoring main control board; the monitoring main control board includes: the main control PCB board and the display PCB board; the main control PCB board adopts a high-performance main control chip to receive and convert data collected by the high-precision overvoltage, overcurrent and leakage current three-in-one sensor so as to calculate a lightning current amplitude, an overvoltage amplitude and a leakage current amplitude; the master control PCB records lightning current time and leakage current time by adopting an IC; the display PCB is used for displaying data of lightning current time and leakage current time in real time. The intelligent grounding monitoring device automatically monitors the grounding reliability states of the screen cabinet and the secondary equipment on line, data can be stored for inquiry, the minimum value of the collected lightning current can reach 10A, the minimum value of the overvoltage can reach 20V, and the minimum value of the collected leakage current can reach 1 mA.
Description
Technical Field
The utility model relates to a secondary equipment maintenance of transformer substation equipment especially relates to an intelligence ground monitoring device.
Background
At present, the grounding reliability of a secondary system is an important measure for ensuring the reliable operation of system equipment, the problems of neglected installation of a ground wire of an equipment screen cabinet, corrosion of the ground wire, breakage, loosening of a grounding nut, two-point grounding of an alternating current system and the like often exist, the problems of electrification of the screen cabinet, unsmooth lightning discharge, overlarge circulating current and the like are inevitably caused if abnormal grounding is not found in time, and great potential safety hazards are caused to personal and equipment safety. At present, no monitoring device capable of automatically monitoring the grounding state of equipment and abnormal voltage and abnormal overcurrent of a grounding wire in real time exists in the industry, and no data support for accident analysis exists after a grounding fault occurs, so that optimization and improvement cannot be made.
In a conventional substation grounding grid, devices are connected to a ring-shaped grounding grid and then connected to the ground through a point. The method has the disadvantages that the potential of the grounding point of the equipment is unbalanced, so that the loop current exists in the grounding grid, when the loop current exceeds a safety value, serious potential safety hazards are brought to field maintenance personnel, and the equipment is easy to damage.
With the development of related facilities of a transformer substation, the number of screen cabinets of a power system is increased, a grounding wire is connected with a ground grid in a concealed mode, when the faults of missed connection, disconnection and loosening of wiring occur, the work amount of finding out fault points and removing the faults is large, a large amount of manpower and material resources are needed, a large amount of time is spent on pit opening and inspection, and time and labor are wasted.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
For the above reasons, the applicant proposes an intelligent grounding monitoring device, aiming to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to meet the requirements, the utility model discloses the innovative design intelligence ground connection monitoring devices carries out automatic monitoring to screen cabinet ground state, the electrified condition of screen cabinet shell, the low potential counterattack data, in time know the ground state fault of equipment in time report an emergency and ask for help or increased vigilance, realize the location of trouble, in time discover hidden trouble, shorten troubleshooting time, carry out real-time supervision collection to transient overvoltage overcurrent counterattack data, provide the analysis foundation for the accident reason, improve the production safety level of transformer substation's electric power supply system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an intelligent grounding monitoring device, comprising: the device comprises a shell, a monitoring main control board arranged in the shell, and a high-precision overvoltage, overcurrent and leakage current three-in-one sensor electrically connected with the monitoring main control board;
the monitoring main control board comprises: the main control PCB board and the display PCB board; the main control PCB board receives and converts the data collected by the high-precision overvoltage, overcurrent and leakage current three-in-one sensor by adopting a high-performance main control chip so as to calculate a lightning current amplitude, an overvoltage amplitude and a leakage current amplitude; the master control PCB records overvoltage, lightning current generation time and leakage current overrun time by adopting an IC (integrated circuit); the display PCB is used for displaying data of leakage current time in real time.
The further technical scheme is as follows: the display PCB board controls a plurality of LED lamps, and a key circuit and a display screen are connected with the LED lamps correspondingly; the LED lamps are respectively used for indicating the running state, the warning state and the communication function; the key circuit is provided with an operation key, an alarm key and a communication key corresponding to the LED lamp; the LED lamp, the key circuit and the display screen are all arranged on the front face of the outer side of the shell.
The further technical scheme is as follows: the power supply device further comprises an external interface module, wherein the external interface module is arranged inside the shell and adopts alternating current 220V power supply/direct current 110 and 220V power supply/DC 12V power supply; the external interface module comprises two paths of remote signaling trunk contacts and two paths of communication serial ports; and the two paths of remote signaling trunk contacts are used for inputting the state of the lightning protection device so as to realize fault alarm of the overvoltage protection device.
The further technical scheme is as follows: the two-path communication serial port adopts standard RS485 interface data communication and is correspondingly connected with a wireless module arranged in the monitoring main control board, so that wireless communication is realized while a wired communication mode is supported.
The further technical scheme is as follows: the temperature and humidity acquisition module is arranged at the bottom of the shell; the temperature and humidity acquisition module adopts an ARM controller to realize the acquisition of the temperature and the humidity of the monitoring site.
The further technical scheme is as follows: the high-precision overvoltage, overcurrent and leakage current three-in-one sensor is connected with the shell by adopting a six-core aviation plug, and is used for collecting leakage current; the integrated non-contact Rogowski coil of high accuracy overvoltage, overcurrent, leakage current trinity sensor is used for gathering lightning current, and non-contact overvoltage sensor gathers overvoltage, non-contact CT and gathers ground current.
The further technical scheme is as follows: the top of the shell is provided with a guide rail buckle for fixedly installing the intelligent grounding monitoring device on a standard guide rail integrally.
The further technical scheme is as follows: the display screen is a 1.8-inch TFT display screen.
The further technical scheme is as follows: the intelligent grounding monitoring device is integrally of a box-type structure, and the maximum size of the length, the width and the height of the appearance of the box-type structure is smaller than 108 mm.
The further technical scheme is as follows: the IC accumulates up to 1000 pieces of stored data.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the intelligent grounding monitoring device provided by the scheme can automatically monitor the grounding reliability states of the screen cabinet and the secondary equipment on line, has a remote fault alarm function, is beneficial to timely processing when a fault point is found in time, effectively improves the maintenance efficiency and improves the production safety level; the method can collect lightning current data, overvoltage data, leakage current data, lightning current time, overvoltage data and leakage current time of the grounding circuit, the data can be stored for inquiry, and the current of the grounding circuit can be conveniently and quickly judged. The contact faults are found, the problems of manual troubleshooting and low efficiency are solved, and the system safety is improved; the minimum value of the collected lightning current can reach 10A, the minimum value of the overvoltage can reach 20V, and the minimum value of the collected leakage current can reach 1 mA; the lightning current value, the overvoltage value, the leakage current value, the lightning current, the overvoltage occurrence time and the leakage current overproof occurrence time can be visually displayed through the display screen.
The invention is further described with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is the utility model discloses an intelligence ground connection monitoring devices appearance structure schematic diagram.
Reference numerals
1. Shell 2, TFT display screen
3. External interface module 4 and temperature and humidity acquisition module
5. High-precision three-in-one sensor for overvoltage, overcurrent and leakage current
6. Guide rail fastener
7. Running, warning and communication indicator lamp 8 and key circuit
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The existing market does not have a special monitoring device for the grounding reliability states of a power system screen cabinet and secondary equipment, the grounding state is unknown, faults are concealed, the safety of a power supply system is threatened, and the manual troubleshooting efficiency is low; the existing lightning monitoring device for the screen cabinet circuit and the lightning protection device of the power secondary system monitors a phase line and does not monitor a grounding wire; the existing arrester grounding lead monitoring and early warning device is used for detecting the resistance of the arrester grounding lead, and a pulse inductor records the occurrence frequency of lightning current in the grounding lead and the lightning current in the grounding lead, but the lightning stroke time is unknown, no display screen is used for displaying, and data cannot be visually read.
As shown in fig. 1, in specific embodiment 1, the utility model provides an intelligent grounding monitoring device includes: the high-precision overvoltage, overcurrent and leakage current three-in-one sensor comprises a shell 1, a monitoring main control board arranged in the shell 1, and a high-precision overvoltage, overcurrent and leakage current three-in-one sensor 5 electrically connected with the monitoring main control board.
The monitoring main control board includes: the main control PCB board and the display PCB board; the main control PCB board adopts a high-performance main control chip to receive and convert the data collected by the high-precision overvoltage, overcurrent and leakage current three-in-one sensor 5 so as to calculate the lightning current amplitude and the leakage current amplitude; the master control PCB records lightning current time and leakage current time by using an IC (integrated circuit), and can accumulate and store 1000 pieces of data. The display PCB is used for displaying data of lightning current time and leakage current time in real time.
The display PCB controls a plurality of LED lamps, and the LED lamps are correspondingly connected with a key circuit 8 and a display screen; the LED lamps are the summary of the operation, alarm and communication indicator lamps 7 and are respectively used for indicating the operation state, the alarm state and the communication function; the key circuit 8 is provided with an operation key, an alarm key and a communication key corresponding to the LED lamp; the LED lamp, the key circuit 8 and the display screen are arranged on the front side of the outer side of the shell 1.
The intelligent grounding monitoring device further comprises an external interface module 3, wherein the external interface module 3 is arranged inside the shell 1 and is powered by alternating current 220V (compatible with alternating current 220V, direct current 110 and 220V and direct current 12V). The external interface module 3 comprises two paths of remote signaling trunk contacts and two paths of communication serial ports; and the two paths of remote signaling main contacts are used for monitoring the switching value input of an external device and inputting the state of the lightning protection device so as to realize the fault alarm of the overvoltage protection device. The two-path communication serial port adopts standard RS485 interface data communication and is correspondingly connected with a wireless module arranged in the monitoring main control board, so that wireless communication is carried out while a wired communication mode is supported.
The intelligent grounding monitoring device also comprises a temperature and humidity acquisition module 4, and the temperature and humidity acquisition module 4 is arranged at the bottom of the shell 1; and the temperature and humidity acquisition module 4 adopts an ARM controller to realize the acquisition of the temperature and the humidity of the monitoring site.
The high-precision overvoltage, overcurrent and leakage current three-in-one sensor 5 is connected with the shell 1 by adopting a six-core aviation plug, and the high-precision overvoltage, overcurrent and leakage current three-in-one sensor 5 is used for collecting screen cabinet leakage current, screen cabinet leakage lightning current and low potential counterattack overvoltage; the high-precision overvoltage, overcurrent and leakage current three-in-one sensor 5 integrates a lightning current sensor, an overvoltage sensor and a leakage current sensor.
The top of the shell 1 is provided with a guide rail buckle 6 for integrally and fixedly installing the intelligent grounding monitoring device on a 35mm standard guide rail.
In other more specific embodiments, the display is a 1.8 inch TFT display 2. The intelligent grounding monitoring device is of a box-type structure (namely determined by the design shape of the shell 1), and the maximum size of the box-type structure is smaller than 108 mm.
In still other and further embodiments, the display screen is not limited to changing size or using LCD display; data transmission is not limited to RS485, LORA wireless module or other transmission modes; the high-precision overvoltage, overcurrent and leakage current three-in-one sensor is not limited to a three-core and six-core plug form, and the three-in-one sensor is selected in the current scheme, and in other more specific embodiments, part of functions in the three-in-one sensor are protected by selecting a two-in-one or single sensor; the high-precision sensor is not limited to changing the inductance value to change the range of the collected lightning current value and the range of the leakage current; the whole fixed installation of the device is not limited to wall hanging; the maximum size of the device is not limited to changing the size to avoid, so all the equivalent changes or modifications made by the structure, the characteristics and the principle in the application range of the utility model are included in the application range of the utility model.
In conclusion, the intelligent grounding monitoring device provided by the scheme can automatically monitor the grounding reliability states of the screen cabinet and the secondary equipment on line, has a remote fault alarm function, can detect fault points in time, is beneficial to timely processing, effectively improves the maintenance efficiency and improves the production safety level; the method can realize the collection of lightning flow data, overvoltage data, leakage flow data, lightning current time, overvoltage time and leakage current exceeding time of the grounding line, the data can be stored for inquiry, and the current of the grounding line can be conveniently and quickly judged. The contact faults are found, the problems of manual troubleshooting and low efficiency are solved, and the system safety is improved; the minimum value of the collected lightning current can reach 10A, and the minimum value of the collected leakage current is 1 mA; collecting the minimum overvoltage value of 20V; the lightning current value, the overvoltage time, the leakage current value, the overvoltage value, the lightning current generation time and the leakage current generation time can be visually displayed through the display screen.
The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.
Claims (10)
1. An intelligent grounding monitoring device, comprising: the device comprises a shell, a monitoring main control board arranged in the shell, and a high-precision overvoltage, overcurrent and leakage current three-in-one sensor electrically connected with the monitoring main control board;
the monitoring main control board comprises: the main control PCB board and the display PCB board; the main control PCB board receives and converts the data collected by the high-precision overvoltage, overcurrent and leakage current three-in-one sensor by adopting a high-performance main control chip so as to calculate a lightning current amplitude, an overvoltage amplitude and a leakage current amplitude; the master control PCB records lightning current time and leakage current time by adopting an IC (integrated circuit); the display PCB is used for displaying data of lightning current time and leakage current time in real time.
2. The intelligent grounding monitoring device of claim 1, wherein the display PCB board controls a plurality of LED lamps, and a key circuit and a display screen are connected corresponding to the LED lamps; the LED lamps are respectively used for indicating the running state, the warning state and the communication function; the key circuit is provided with an operation key, an alarm key and a communication key corresponding to the LED lamp; the LED lamp, the key circuit and the display screen are all arranged on the front face of the outer side of the shell.
3. The intelligent grounding monitoring device as claimed in claim 1, further comprising an external interface module, wherein the external interface module is disposed inside the housing and powered by ac 220V power supply/DC 110 and 220V power supply/DC 12V; the external interface module comprises two paths of remote signaling trunk contacts and two paths of communication serial ports; and the two paths of remote signaling trunk contacts are used for inputting the state of the lightning protection device so as to realize fault alarm of the overvoltage protection device.
4. The intelligent grounding monitoring device of claim 3, wherein the two-way communication serial port adopts standard RS485 interface data communication, and is correspondingly connected with a wireless module built in the monitoring main control board, so as to realize wireless communication while supporting a wired communication mode.
5. The intelligent grounding monitoring device of claim 1, further comprising a temperature and humidity acquisition module, wherein the temperature and humidity acquisition module is arranged at the bottom of the housing; the temperature and humidity acquisition module adopts an ARM controller to realize the acquisition of the temperature and the humidity of the monitoring site.
6. The intelligent ground monitoring device of claim 1, wherein the high-precision three-in-one over-voltage, over-current and leakage current sensor is connected to the housing using a five-core aviation plug, and the high-precision three-in-one over-voltage, over-current and leakage current sensor is used for collecting leakage current; the integrated non-contact Rogowski coil of high accuracy overvoltage, overcurrent, leakage current trinity sensor is used for gathering lightning current, and non-contact overvoltage sensor gathers overvoltage, non-contact CT and gathers ground current.
7. The intelligent grounding monitoring device of claim 1, wherein a rail clip is provided on the top of the housing for fixedly mounting the intelligent grounding monitoring device on a standard rail as a whole.
8. The intelligent ground monitoring device of claim 2, wherein the display screen is a 1.8 inch TFT display screen.
9. The intelligent earth monitoring device of claim 1, wherein the intelligent earth monitoring device is a box-like structure having a maximum dimension of less than 108mm in length, width and height.
10. The intelligent earth monitoring device of claim 2, wherein the IC accumulates stored data up to 1000 items.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922211649.9U CN211786026U (en) | 2019-12-11 | 2019-12-11 | Intelligent grounding monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922211649.9U CN211786026U (en) | 2019-12-11 | 2019-12-11 | Intelligent grounding monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN211786026U true CN211786026U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922211649.9U Active CN211786026U (en) | 2019-12-11 | 2019-12-11 | Intelligent grounding monitoring device |
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| CN (1) | CN211786026U (en) |
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