CN216310244U - Open-circuit fault diagnosis device for power tube of direct-current charging pile rectifier - Google Patents
Open-circuit fault diagnosis device for power tube of direct-current charging pile rectifier Download PDFInfo
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- CN216310244U CN216310244U CN202122909825.3U CN202122909825U CN216310244U CN 216310244 U CN216310244 U CN 216310244U CN 202122909825 U CN202122909825 U CN 202122909825U CN 216310244 U CN216310244 U CN 216310244U
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 66
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000007405 data analysis Methods 0.000 description 1
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Abstract
The application provides a direct current fills electric pile rectifier power tube fault diagnosis device that opens a way, the device includes: the system comprises a data acquisition module for acquiring electric signals of an alternating current side and a direct current side of a direct current charging pile rectifier and a fault diagnosis module for receiving the electric signals of the data acquisition module, processing the electric signals and outputting a diagnosis result; the data acquisition module comprises a first acquisition unit and a second acquisition unit, and the output ends of the first acquisition unit and the second acquisition unit are electrically connected with the input end of the fault diagnosis module. This application just can diagnose whether there is the power tube fault of opening a way in the direct current fills electric pile current ware through gathering rectifier alternating current and direct current both sides electric current and voltage data to upload the host computer with the fault, be convenient for discover the fault, convenient maintenance, and easily fall to the ground and implement.
Description
Technical Field
The application relates to the technical field of new energy, in particular to a direct-current charging pile rectifier power tube open-circuit fault diagnosis device.
Background
Currently, an electric vehicle charging pile has become one of key infrastructures of new energy, and national grid limited companies are comprehensively building new energy vehicle charging facilities. The direct current fills electric pile is new energy automobile fills electric pile construction and development battery charging outfit, however, because its converter power tube trouble proportion is higher, has become the weak link that fills electric pile safe operation, and wherein, when power device takes place the open circuit trouble, possesses the unobvious and difficult discovery characteristics of fault characteristics. If the open-circuit fault of the power device is not discovered and maintained in time, harmonic wave influence is generated on a power grid, and the normal power device is induced to be damaged in an accelerating way, so that the charging pile is finally stopped due to sudden fault. However, there is currently no effective and easy-to-implement fault diagnosis apparatus.
Therefore, an efficient and easy-to-implement fault diagnosis apparatus is needed.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an open-circuit fault diagnosis device for a power tube of a rectifier of a dc charging pile, which is characterized in that: the method comprises the following steps: the system comprises a data acquisition module for acquiring electric signals of an alternating current side and a direct current side of a direct current charging pile rectifier and a fault diagnosis module for receiving the electric signals of the data acquisition module, processing the electric signals and outputting a diagnosis result;
the data acquisition module comprises a first acquisition unit and a second acquisition unit, and the output ends of the first acquisition unit and the second acquisition unit are electrically connected with the input end of the fault diagnosis module;
the first acquisition unit comprises an alternating current transformer and an alternating voltage transformer which are arranged on the alternating current side of the direct current charging pile rectifier, and the output ends of the alternating current transformer and the alternating voltage transformer are electrically connected with the input end of the fault diagnosis module;
the second acquisition unit comprises a direct current transformer and a direct current voltage transformer which are arranged on the direct current side of the direct current charging pile rectifier, and the output ends of the direct current transformer and the direct current voltage transformer are electrically connected with the input end of the fault diagnosis module.
Further, the device also comprises a remote monitoring module which is in communication connection with the fault diagnosis module.
Furthermore, the fault diagnosis module also comprises an A/D converter, the input end of the A/D converter is electrically connected with the output end of the data acquisition module, and the output end of the A/D converter is electrically connected with the fault diagnosis module.
Furthermore, the first acquisition unit is used for acquiring three-phase alternating current power supply data input into the direct current charging pile, and the acquisition cycle of the first acquisition unit is less than millisecond level.
Further, the second acquisition unit is used for acquiring current and voltage data of the direct current output side of the input direct current charging pile, and the acquisition cycle of the second acquisition unit is less than millisecond level.
Further, the communication mode adopted by the application is PCI bus communication.
Further, the fault diagnosis module adopts a DSP processor.
Furthermore, the fault diagnosis module further comprises a display unit, wherein the input end of the display unit is electrically connected with the output end of the fault diagnosis module, and the display unit is used for displaying the diagnosis result of the fault diagnosis module.
The utility model has the beneficial technical effects that: this application just can diagnose whether there is the power tube fault of opening a way in the direct current fills electric pile current ware through gathering rectifier alternating current and direct current both sides electric current and voltage data to upload the host computer with the fault, be convenient for discover the fault, convenient maintenance, and easily fall to the ground and implement.
Drawings
The utility model is further described below with reference to the following figures and examples:
fig. 1 is a block diagram of the system of the present application.
Fig. 2 is a circuit topology diagram of the dc charging pile rectifier of the application.
Detailed Description
The utility model is further described with reference to the accompanying drawings in which:
the utility model provides a direct current charging pile rectifier power tube open-circuit fault diagnosis device, which is characterized in that: the method comprises the following steps: as shown in fig. 1, the fault diagnosis system comprises a data acquisition module for acquiring electric signals of an alternating current side and a direct current side of a direct current charging pile rectifier, and a fault diagnosis module for receiving the electric signals of the data acquisition module, processing the electric signals and outputting a diagnosis result; the diagnosis device is arranged on the alternating current side and the direct current side of the direct current charging pile rectifier, and is used for collecting current data on the alternating current side and the direct current side of the rectifier power tube as shown in fig. 2. The fault diagnosis module further comprises a display unit, wherein the input end of the display unit is electrically connected with the output end of the fault diagnosis module and used for displaying the diagnosis result of the fault diagnosis module. The display unit adopts the existing display products, such as an LED display screen.
The data acquisition module comprises a first acquisition unit and a second acquisition unit, and the output ends of the first acquisition unit and the second acquisition unit are electrically connected with the input end of the fault diagnosis module;
the first acquisition unit comprises an alternating current transformer and an alternating voltage transformer which are arranged on the alternating current side of the direct current charging pile rectifier, and the output ends of the alternating current transformer and the alternating voltage transformer are electrically connected with the input end of the fault diagnosis module;
the second acquisition unit comprises a direct current transformer and a direct current voltage transformer which are arranged on the direct current side of the direct current charging pile rectifier, and the output ends of the direct current transformer and the direct current voltage transformer are electrically connected with the input end of the fault diagnosis module. In this embodiment, alternating current transformer, alternating voltage transformer, direct current transformer and direct current voltage transformer all adopt current products, like the current side current transformer model: LMZJ1-0.5, type of direct current side current transformer: CHND-BH-0.66I type, AC side voltage transformer type: JDG4-0.5TH, dc side voltage sensor model: DBKCT40, which will not be described in detail herein. According to the technical scheme, the electric signal of the direct current charging pile to be diagnosed can be automatically acquired, whether an open circuit fault exists in a rectifier of the direct current charging pile is diagnosed in real time, and the working stability of the direct current charging pile is improved. Meanwhile, the service life of the direct current charging pile can be prolonged, and the direct current charging pile fault is prevented from influencing the stable operation of a power grid.
The device also comprises a remote monitoring module which is in communication connection with the fault diagnosis module. The remote monitoring module transmits the local data to the upper computer, so that centralized management of the data, query of subsequent data and data analysis are facilitated.
In this embodiment, the fault diagnosis module further includes an a/D converter, an input end of the a/D converter is electrically connected to an output end of the data acquisition module, and an output end of the a/D converter is electrically connected to the fault diagnosis module. The a/D converter is a circuit that quantizes an analog quantity or a continuously variable quantity and converts the quantized quantity into a corresponding digital quantity. In this embodiment, the a/D converter converts the acquired analog electrical signal into a digital electrical signal, which facilitates the processing of the data by the fault diagnosis module.
In this embodiment, the first collecting unit is configured to collect three-phase ac power data input to the dc charging pile, and a collecting cycle of the first collecting unit is less than a millisecond level. The second acquisition unit is used for acquiring current and voltage data of the direct current output side of the input direct current charging pile, and the acquisition period of the second acquisition unit is less than millisecond level. The acquisition of front-end data provides basic data for the fault diagnosis module, and the acquired data period is less than millisecond level, so that the precision of fault diagnosis is improved conveniently, and the accuracy of fault diagnosis is improved; in addition, the smaller the data acquisition period, the stronger the continuity between data, and the higher the accuracy of monitoring the rectifier of the dc charging pile.
In this embodiment, the communication method adopted in the present application is PCI bus communication. Communicate through PCI bus communication mode, save the information of gathering simultaneously, host computer type number: SCM9200 type PC104 system core module.
In this embodiment, the fault diagnosis module adopts a DSP processor, and utilizes a fault diagnosis method built in the DSP to implement fault diagnosis of the power tube. The model is as follows: TMS320F28335 chip is a DSP processor with 32-bit floating point processing capability.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. The utility model provides a direct current fills electric pile rectifier power tube fault diagnosis device that opens a way which characterized in that: the method comprises the following steps: the system comprises a data acquisition module for acquiring electric signals of an alternating current side and a direct current side of a direct current charging pile rectifier and a fault diagnosis module for receiving the electric signals of the data acquisition module, processing the electric signals and outputting a diagnosis result;
the data acquisition module comprises a first acquisition unit and a second acquisition unit, and the output ends of the first acquisition unit and the second acquisition unit are electrically connected with the input end of the fault diagnosis module;
the first acquisition unit comprises an alternating current transformer and an alternating voltage transformer which are arranged on the alternating current side of the direct current charging pile rectifier, and the output ends of the alternating current transformer and the alternating voltage transformer are electrically connected with the input end of the fault diagnosis module;
the second acquisition unit comprises a direct current transformer and a direct current voltage transformer which are arranged on the direct current side of the direct current charging pile rectifier, and the output ends of the direct current transformer and the direct current voltage transformer are electrically connected with the input end of the fault diagnosis module.
2. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 1, characterized in that: the device also comprises a remote monitoring module which is in communication and electric connection with the fault diagnosis module.
3. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 2, characterized in that: the fault diagnosis module further comprises an A/D converter, the input end of the A/D converter is connected with the output end of the data acquisition module, and the output end of the A/D converter is electrically connected with the fault diagnosis module.
4. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 1, characterized in that: the first acquisition unit is used for acquiring three-phase alternating current power supply data input into the direct current charging pile, and the acquisition period of the first acquisition unit is less than millisecond level.
5. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 1, characterized in that: the second acquisition unit is used for acquiring current and voltage data of the direct current output side of the input direct current charging pile, and the acquisition period of the second acquisition unit is less than millisecond level.
6. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 1, characterized in that: the communication mode adopted by the application is PCI bus communication.
7. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 1, characterized in that: the fault diagnosis module adopts a DSP processor.
8. The open-circuit fault diagnosis device for the power tube of the direct-current charging pile rectifier according to claim 1, characterized in that: the fault diagnosis module further comprises a display unit, wherein the input end of the display unit is electrically connected with the output end of the fault diagnosis module and used for displaying the diagnosis result of the fault diagnosis module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122909825.3U CN216310244U (en) | 2021-11-24 | 2021-11-24 | Open-circuit fault diagnosis device for power tube of direct-current charging pile rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122909825.3U CN216310244U (en) | 2021-11-24 | 2021-11-24 | Open-circuit fault diagnosis device for power tube of direct-current charging pile rectifier |
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| Publication Number | Publication Date |
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| CN216310244U true CN216310244U (en) | 2022-04-15 |
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| CN202122909825.3U Active CN216310244U (en) | 2021-11-24 | 2021-11-24 | Open-circuit fault diagnosis device for power tube of direct-current charging pile rectifier |
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| CN (1) | CN216310244U (en) |
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2021
- 2021-11-24 CN CN202122909825.3U patent/CN216310244U/en active Active
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