CN210376644U - Ground fault monitoring device based on small ground current system - Google Patents
Ground fault monitoring device based on small ground current system Download PDFInfo
- Publication number
- CN210376644U CN210376644U CN201921172738.0U CN201921172738U CN210376644U CN 210376644 U CN210376644 U CN 210376644U CN 201921172738 U CN201921172738 U CN 201921172738U CN 210376644 U CN210376644 U CN 210376644U
- Authority
- CN
- China
- Prior art keywords
- plug
- fault monitoring
- current system
- ground fault
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a ground fault monitoring devices based on little ground current system, including signal collector and central processing unit, central processing unit is DSP digital signal processor, DSP digital signal processor through the CAN bus respectively with signal collector, division are gone into and are gone out plug-in components and tripping plug-in components and link to each other, DSP digital processor still communicates with the terminal through the embedded man-machine interface of ARM MMI mutually. The utility model adopts the above structure ground fault monitoring devices based on little ground current system through setting up CAN bus connection interface and central processing unit, has reduced complicated interface line to the possibility that the trouble produced has been reduced.
Description
Technical Field
The utility model relates to a ground fault monitoring technology especially relates to a ground fault monitoring devices based on little ground current system.
Background
The ground fault monitoring of the small ground current system is suitable for the indirect grounding system in the power grid system of 66kV or below. The most common fault in a small grounding current system is single-phase grounding, and when the single-phase grounding fault occurs, zero-sequence current flows through all circuits with capacitance to the ground. However, since the zero sequence current is small and has great dispersibility, the selection of the grounding circuit is difficult to a certain extent, and the circuit connection between the interfaces is complex, so that the difficulty of the line selection of the fault circuit is further increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a ground fault monitoring devices based on little ground current system through setting up CAN bus connection interface and central processing unit, has reduced complicated interface line to the possibility that the trouble produced has been reduced.
In order to realize the above object, the utility model provides a ground fault monitoring devices based on little ground current system, including signal collector and central processing unit, central processing unit is DSP digital signal processor, DSP digital signal processor through the CAN bus respectively with signal collector, division-in and division-out plug-in components and tripping plug-in components link to each other, DSP digital processor still communicates with the terminal through the embedded man-machine interface of ARM MMI mutually.
Preferably, the signal collector comprises a current transformer and a voltage transformer, the current transformer and the voltage transformer are respectively connected with a current plug-in unit and a voltage plug-in unit after passing through an AD converter, and the current plug-in unit and the voltage plug-in unit are respectively connected with the DSP digital signal processor through an analog channel.
Preferably, the terminal is provided with an LCD liquid crystal display screen and a status indicator lamp.
Preferably, the DSP is also connected with a power plug-in.
Therefore, the utility model discloses an adopt the ground fault monitoring devices based on little ground current system of above-mentioned structure, through setting up CAN bus connection interface and central processing unit, reduced complicated interface line to the possibility that the trouble produced has been reduced.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a block diagram of a ground fault monitoring device based on a small ground current system according to an embodiment of the present invention;
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
Fig. 1 is a block diagram of a ground fault monitoring device based on a small ground current system according to an embodiment of the present invention, as shown in fig. 1, the structure of the present invention comprises a signal collector and a central processing unit, wherein the central processing unit is a DSP digital signal processor, the DSP digital signal processor is respectively connected with the signal collector, the input/output plug-in and the tripping plug-in through a CAN bus, the DSP is also communicated with the terminal through an ARM MMI embedded man-machine interface, the DSP is connected with the ARM MMI embedded man-machine interface through an RS485 bus, and particularly, the signal collector comprises a current transformer and a voltage transformer, the current transformer and the voltage transformer are respectively connected with a current plug-in unit and a voltage plug-in unit after passing through an AD converter, and the current plug-in unit and the voltage plug-in unit are connected with the DSP through an analog channel. Preferably, the terminal is provided with an LCD (liquid crystal display) screen and a status indicator lamp, the LCD screen is further provided with a parameter setting key, and the parameter setting key is a touch key. Preferably, the DSP is further connected to a power plug, the present embodiment at least includes four trip plugs and four current plugs, and the combination between the plugs and the CAN bus is set to replace the conventional interface connection, so as to reduce the circuit layout, thereby reducing the possibility of generating faults.
Therefore, the utility model discloses an adopt the ground fault monitoring devices based on little ground current system of above-mentioned structure, through setting up CAN bus connection interface and central processing unit, reduced complicated interface line to the possibility that the trouble produced has been reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a ground fault monitoring devices based on little ground current system, includes signal collector and central processing unit, its characterized in that: the central processing unit is a DSP digital signal processor, the DSP digital signal processor is respectively connected with the signal collector, the input/output plug-in and the tripping plug-in through a CAN bus, and the DSP digital processor is communicated with the terminal through an ARM MMI embedded man-machine interface.
2. The ground fault monitoring device based on the small ground current system according to claim 1, characterized in that: the signal collector comprises a current transformer and a voltage transformer, the current transformer and the voltage transformer are respectively connected with a current plug-in unit and a voltage plug-in unit after passing through an AD converter, and the current plug-in unit and the voltage plug-in unit are respectively connected with the DSP digital signal processor through an analog channel.
3. The ground fault monitoring device based on the small ground current system according to claim 1, characterized in that: and an LCD liquid crystal display screen and a status indicator lamp are arranged on the terminal.
4. The ground fault monitoring device based on the small ground current system according to claim 1, characterized in that: the DSP is also connected with a power plug-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921172738.0U CN210376644U (en) | 2019-07-24 | 2019-07-24 | Ground fault monitoring device based on small ground current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921172738.0U CN210376644U (en) | 2019-07-24 | 2019-07-24 | Ground fault monitoring device based on small ground current system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210376644U true CN210376644U (en) | 2020-04-21 |
Family
ID=70273601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921172738.0U Active CN210376644U (en) | 2019-07-24 | 2019-07-24 | Ground fault monitoring device based on small ground current system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210376644U (en) |
-
2019
- 2019-07-24 CN CN201921172738.0U patent/CN210376644U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103107518B (en) | A kind of photovoltaic DC-to-AC converter and protective device thereof | |
| CN210376644U (en) | Ground fault monitoring device based on small ground current system | |
| CN203967750U (en) | A kind of arc-extinguishing harmonic-eliminating integrated cabinet | |
| CN203396890U (en) | Disconnection alarm for digital input signals | |
| CN205610225U (en) | Transformer excess load automatic switching control equipment | |
| CN106100128B (en) | Monitoring device is isolated in active power distribution network intelligent terminal accumulator | |
| CN114552764A (en) | High-voltage side standby power supply automatic switching device based on PLC and automatic switching method thereof | |
| CN204008891U (en) | A kind of interchange scurried into straight-flow system alarm and wave recording device | |
| CN207380175U (en) | A kind of intelligence small current system earthing line selecting device | |
| CN204479698U (en) | Wireless networking formula high precision fast line selection device | |
| CN208299429U (en) | Comprehensive protector | |
| CN209088521U (en) | Mutually protective device | |
| CN207166138U (en) | A kind of subway station distribution system | |
| CN207623395U (en) | A kind of divider of ontology and second divided voltage plate Phototube Coupling | |
| CN112018719A (en) | 10KV line measurement and control protection device | |
| CN201199628Y (en) | Protecting equipment for electric force power distribution PLC control detection line | |
| CN2852481Y (en) | Microcomputer low-tension motor protection device | |
| CN210669518U (en) | Line protection system based on intelligent electric power instrument | |
| CN205429737U (en) | Electric reactive compensating controller | |
| CN214337568U (en) | Synchronous switch | |
| CN216086166U (en) | Distributed control high-voltage reactive automatic compensation system | |
| CN214755475U (en) | Intelligent generator transmitter | |
| CN204228879U (en) | A kind of line selection apparatus of earthed system | |
| CN113466735B (en) | Variable power supply monitoring circuit | |
| CN208820749U (en) | A kind of power amplifier for electricity net safety stable Strategy Simulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |