CN203054151U - Small current grounding fault line selection device based on DSP - Google Patents
Small current grounding fault line selection device based on DSP Download PDFInfo
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- CN203054151U CN203054151U CN 201320018048 CN201320018048U CN203054151U CN 203054151 U CN203054151 U CN 203054151U CN 201320018048 CN201320018048 CN 201320018048 CN 201320018048 U CN201320018048 U CN 201320018048U CN 203054151 U CN203054151 U CN 203054151U
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- line selection
- fault line
- low
- device based
- ground fault
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Abstract
A small current grounding fault line selection device based on DSP is characterized by comprising a main controller, a compile converter, an analog data acquisition device, an input operation panel and a communication interface, wherein the input operation panel is connected to the main controller, the main controller is connected to the compile converter, the compile converter is connected to the analog data acquisition device, the analog data acquisition device is connected to an external device by a periphery interface, a current transmitter is arranged in the device, and connected with a power supply. The small current grounding fault line selection device is simple to operate, easy to carry, and strong in adaptability.
Description
Technical field
The utility model relates to a kind of electric insulation fault diagnosis technology field, is specifically related to a kind of low-current ground fault line selection field.
Background technology
When small current neutral grounding system has singlephase earth fault, the reason such as faint and trouble spot electric arc instability owing to fault current, the route selection of earth fault and location be difficulty relatively.For a long time, people do a lot of work, and have developed the multiple method of inspection and device, but the actual motion effect is unsatisfactory.Owing to lack reliable failure line selection means, power supply enterprise has to select faulty line with the method for manually drawing the road mostly.Manually draw the road can cause non-fault line power supply to interrupt in short-term, influence the normal operation of user power utilization equipment, this is a kind of huge disaster for the quality of power supply exigent today.Therefore, study a kind of novel low-current ground fault line selection device based on DSP problem for demanding urgently solving.
The utility model content
At the defective that prior art exists, the purpose of this utility model is to propose a kind of low-current ground fault line selection device based on DSP, and is simple to operate, and is convenient for carrying, and adaptability is strong.
The technical solution of the utility model is: a kind of low-current ground fault line selection device based on DSP, it is characterized in that: comprise master controller, compiling converter, analog data acquisition device, input operation panel and communication interface, the input operation panel connects the control master controller, master controller link edition converter, the compiling converter connects the simulation data acquisition unit, the analog data acquisition device connects external unit by Peripheral Interface, be provided with current transducer in the device, current transducer connects power supply.Device can be switched on by external power supply, can pass through powered battery.
Preferably, also be provided with wave filter between analog data acquisition device and the communication interface.
Preferably, have display on the master controller.
Preferably, be parallel with a plurality of Peripheral Interfaces on the analog data acquisition device.
Preferably, be provided with the sign mutation warning system in the device.
Preferably, be provided with current amplification circuit in the device.
Preferably, be provided with high performance injection signal generator in the device.
Preferably, be provided with electric energy storage device in the device.
Preferably, also be provided with communication interface on the device.
Preferably, communication interface is Ethernet interface or 3G signal transceiver.
Useful technique effect of the present utility model is:
1, master controller is the nucleus module of whole device, and the action command of every other module is all sent by it, and the data that all peripheral hardwares are sent here all will be carried out computing in this module.It is by digital signal processor (DSP), real-time clock, house dog and extend out devices such as RAM and form.
2, the compiling converter is changed compiling for the virtual signal of whole collection, sends to master controller then, carries out data analysis.
3, the analog data acquisition device is the data acquisition system (DAS) of device, is made up of 16 precision A/D converters that exchange load module, filter circuit, multi-way switch and high reliability.The active low-pass filter that employing is made of RC network and operational amplifier.In RC network, introduce active device, can realize that transport function conjugate pole occurs at a left side, S territory half-plane, obtains good filtering characteristic.For complicacy and the time delay that does not increase device, exponent number is chosen unsuitable too high, selects the second-order low-pass filter circuit in the native system for use.
4, this line selection apparatus can be gathered multichannel zero-sequence current and multistage bus residual voltage signal, can satisfy the requirement of most transformer stations.
5, the input operation panel adopts man-machine interface, can facilitate for operating personnel's work.The man-machine interface of this device part is made up of LED light, LCD and button, has simple to operately, and characteristics are easily learnt in use, provides convenience, operating environment intuitively.Adopt LED as the pilot lamp of line status, adopt and irritate current system, utilize phase inverter to play buffer action simultaneously.
6, owing to adopted lcd technology, its powerful Presentation Function makes the application of menu technique become possibility, so only needs several less buttons just can realize complicated operations.Check the current system status information that shows in the liquid crystal display for the ease of the user, device has adopted keyboard.
7, communication interface adopts ethernet controller to constitute embedded ethernet interface, perhaps adopts brand-new 3G signal transceiver to accept and transmits the 3G signal, is used for long-range shared information.
8, power supply, this line selection apparatus change alternating current 220V into work direct current: 24V through AC-DC and are the direct relay power supply of output; + 5V through behind the low-dropout linear voltage-regulating circuit for the power supply of LCD power conversion chip or through DC-DC linear voltage transducer be converted to+3.3V ,+1.9V and+power for devices such as DSP behind the 2.5V, + 12V is converted to ± 10V through DC-DC linear voltage transducer, use for amplifier, perhaps adopt electric energy storage device to carry out portable operation and use.
Description of drawings
Fig. 1 is that the utility model embodiment is based on the structured flowchart of the low-current ground fault line selection device of DSP.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 is that the utility model embodiment is based on the structured flowchart of the low-current ground fault line selection device of DSP, as shown in Figure 1, low-current ground fault line selection device based on DSP comprises master controller, compiling converter, analog data acquisition device, input operation panel and Peripheral Interface, the input operation panel connects the control master controller, master controller link edition converter, the compiling converter connects the simulation data acquisition unit, the analog data acquisition device connects external unit by Peripheral Interface, be provided with current transducer in the device, current transducer connects power supply.
The utility model also is, also is provided with wave filter between analog data acquisition device and the communication interface.
The utility model also is, has display on the master controller.
The utility model also is, is parallel with a plurality of Peripheral Interfaces on the analog data acquisition device.
The utility model also is, is provided with the sign mutation warning system in the device.
The utility model also is, is provided with current amplification circuit in the device.
The utility model also is, is provided with high performance injection signal generator in the device.
The utility model also is, is provided with electric energy storage device in the device.
The utility model also is, also is provided with communication interface on the device.
The utility model is that also communication interface is Ethernet interface or 3G signal transceiver.
The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model description to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (10)
1. low-current ground fault line selection device based on DSP, it is characterized in that: comprise master controller, compiling converter, analog data acquisition device, input operation panel and communication interface, the input operation panel connects the control master controller, master controller link edition converter, the compiling converter connects the simulation data acquisition unit, the analog data acquisition device connects external unit by Peripheral Interface, is provided with current transducer in the device, and current transducer connects power supply.
2. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: also be provided with wave filter between analog data acquisition device and the communication interface.
3. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: have display on the master controller.
4. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: be parallel with a plurality of Peripheral Interfaces on the analog data acquisition device.
5. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: be provided with the sign mutation warning system in the device.
6. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: be provided with current amplification circuit in the device.
7. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: be provided with high performance injection signal generator in the device.
8. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: be provided with electric energy storage device in the device.
9. a kind of low-current ground fault line selection device based on DSP according to claim 1 is characterized in that: also be provided with communication interface on the device.
10. a kind of low-current ground fault line selection device based on DSP according to claim 1, it is characterized in that: communication interface is Ethernet interface or 3G signal transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018048 CN203054151U (en) | 2013-01-14 | 2013-01-14 | Small current grounding fault line selection device based on DSP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018048 CN203054151U (en) | 2013-01-14 | 2013-01-14 | Small current grounding fault line selection device based on DSP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203054151U true CN203054151U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320018048 Expired - Fee Related CN203054151U (en) | 2013-01-14 | 2013-01-14 | Small current grounding fault line selection device based on DSP |
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| CN (1) | CN203054151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472425A (en) * | 2013-09-17 | 2013-12-25 | 国家电网公司 | Method for applying low-current line selection device performance testing platform |
-
2013
- 2013-01-14 CN CN 201320018048 patent/CN203054151U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472425A (en) * | 2013-09-17 | 2013-12-25 | 国家电网公司 | Method for applying low-current line selection device performance testing platform |
| CN103472425B (en) * | 2013-09-17 | 2015-11-11 | 国家电网公司 | A kind of application process of line selection device for low current performance testing platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20140114 |