CN203595753U - Alternating-current component detection device for direct-current power supply - Google Patents
Alternating-current component detection device for direct-current power supply Download PDFInfo
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- CN203595753U CN203595753U CN201320723651.4U CN201320723651U CN203595753U CN 203595753 U CN203595753 U CN 203595753U CN 201320723651 U CN201320723651 U CN 201320723651U CN 203595753 U CN203595753 U CN 203595753U
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Abstract
The utility model discloses an alternating-current component detection device for a direct-current power supply. The device comprises an alternating-current separating module, a signal conversion module, a photoelectric isolation module, a main chip and a warning module which are sequentially connected. The alternating-current separating module is used for separating a direct-current signal from an alternating-current component signal. The signal conversion module is used for converting the alternating-current signal into a digital signal. The photoelectric isolation module is used for transmitting the digital signal to the main chip. The main chip is used for comparing the detected alternating-current component signal with a preset warning value, and outputting a control signal if the alternating-current component signal exceeds the preset warning value. The warning module is used for receiving the control signal and giving a warning. An input terminal of the alternating-current separating module is connected with a direct-current bus. According to the utility model, a direct-current system is additionally provided with the alternating-current component detection device, such that when a certain amount of alternating-current component goes into the direct-current system, the device gives an alarm to warn us to treat the fault in time, thereby preventing severe accidents caused by burning of important equipment and misoperation of protection relays as the alternating-current component goes into the direct-current system in a substation.
Description
Technical field
The utility model relates to electricity field, specifically a kind of AC compounent pick-up unit of direct supply.
Background technology
Direct supply is the core of transformer station, reliable source of power is provided mainly to second protection equipment, High-low voltage switch cabinet combined floodgate control operation mechanism.
Existing conventional straight-flow system is not set up AC compounent and is scurried into device, cannot detect and alarm if there is AC compounent to scurry into system.Conventional transforming plant DC power source bus is not set up AC compounent pick-up unit; once direct current feeds out loop-coupled High-low voltage switch cabinet switch-on operating mechanism; to cause relay protection device misoperation or inefficacy if scurry into straight-flow system bus by the interchange of high-low pressure cabinet; and cause transformer station to burn out main transformer and High-low voltage switch cabinet, will cause unnecessary accident.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of AC compounent pick-up unit of direct supply, and can catch detection for the AC compounent sealing in DC circuit system, and send warning, thus protection direct supply and equipment.
For solving the problems of the technologies described above, the technical scheme that the utility model provides is:
An AC compounent pick-up unit for direct supply, comprise successively connect for interchange separation module that DC signal is separated with AC compounent electric signal, for ac signal is converted to the signal conversion module of digital signal, for by digital data transmission to the photoelectric isolation module of master chip, for the AC compounent signal detecting and default alarm numerical value being contrasted and exporting the master chip of control signal, alarm module for reception control signal outputting alarm while presetting alarm numerical value when AC compounent signal exceedes; The input end of described interchange separation module is connected with DC bus.
Preferably, the output terminal of described master chip is also connected with photoelectric isolation module and RS485 communication module in turn, and the output terminal of described RS485 communication module is connected with host computer or protection equipment moving device.
Preferably, the input end of described interchange separation module is provided with the JP1 port for connecting DC bus.
Preferably, the PAND of described JP1 port is connected with ground.
Preferably, described alarm module comprises sound and/or light alarm module.
Preferably, in described alarm module, be provided with alarm relay.
Preferably, described alarm relay output terminal is provided with the JP2 interface for outputting alarm.
The utlity model has following advantage:
The utility model carries out inlet wire detection to DC bus, by exchanging separation module, the direct current signal in DC circuit is separated with shunting signal, and convert above-mentioned AC compounent electric signal of catching to digital signal by signal conversion module, then be transferred to master chip by photoelectric isolation module, master chip is by the AC compounent signal detecting and the contrast of default alarm numerical value and in the time that AC compounent signal exceedes default alarm numerical value, export control signal, alarm module receives outputting alarm after control signal, to point out us timely handling failure, can avoid transformer station to scurry into straight-flow system because of AC compounent causes visual plant to burn out with protective relaying maloperation making the major accident causing.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the AC compounent pick-up unit of a kind of direct supply of the utility model.
Embodiment
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Refer to Fig. 1, Fig. 1 is the structural representation of the AC compounent pick-up unit of a kind of direct supply in the utility model embodiment, comprise the interchange separation module 1, signal conversion module 2, photoelectric isolation module 3, master chip 4, the alarm module 5 that connect successively, wherein, the input end that exchanges separation module 1 is connected with DC bus, for DC signal is separated with AC compounent electric signal; Signal conversion module 2 is for converting virtual ac signal to digital signal; Photoelectric isolation module 3, after the AC compounent digital signal receiving after conversion, arrives master chip by this digital data transmission; Master chip 4 is for by the contrast of the AC compounent signal detecting and default alarm numerical value, and exports control signal when AC compounent signal exceedes while presetting alarm numerical value, and in the present embodiment, master chip is generally CPU, specifically comprises the STM32 of Cortex-M3 kernel etc.; Alarm module 5 is for reception control signal outputting alarm, and alarm module used is generally specially sound and/or light alarm device, for the ease of the inquiry of trouble spot, adopts sound and light alarm device to report to the police in the present embodiment.
In addition, for the AC compounent pick-up unit providing in the utility model embodiment is provided, generally this device is connected by circuit with the computing machine that other can directly send manipulation order to it, this computing machine is commonly referred to as host computer or background computer, this computing machine generally comprises the types such as PC/host computer/master computer/upper computer, show various signal intensities by this computer screen, the mode connecting comprises employing RS485 communication module 7, RS232 485 modules, one in RS232 module, forming telecommunication circuit is connected direct current AC compounent pick-up unit with extraneous computing machine.The present embodiment connects photoelectric isolation module and RS485 communication module successively by the output terminal at master chip, and the output terminal of RS485 communication module is connected to realize with host computer or protection equipment moving device.Photoelectric isolation module 6 is realized the conversion of " electrical-optical-electricity ", thereby by master chip fetch equipment status data (being generally analog quantity) frequently, converts digital signal to feed back to aforementioned computing machine by photoelectric isolation module 6.User can be as required, by the default alarm numerical value of this host computer, and transfer to master chip by telecommunication circuit and preserve in advance, when detecting in DC bus, master chip seals in after AC compounent, master chip is compared this AC compounent digital signal and default alarm numerical value, when sealing in AC compounent signal higher than set alarm preset value, start alarm module, outputting alarm signal.
For holding circuit, in alarm module, be provided with alarm relay.Alarm relay output terminal is provided with the JP2 interface for outputting alarm, disconnects adhesive when fault when normal.In order to detect multichannel bus simultaneously, can, by multiple relay output and JP2 non-working port are set, reach and export the alarm of many bus AC compounent simultaneously with this.In order to enter the unitarity of bus of this device, be connected with JP1 at the lead-in wire terminal of bus, same bus is divided into several circuit separately, in order to support the need for electricity of different electrical parts, the PAND of JP1 port is connected with ground.
Only as described above, it is only the preferred embodiment of the utility model, when not limiting with this scope of the utility model enforcement, the content of generally recording according to the utility model claim and utility model instructions has been done simple equivalence and has been changed and modify, within all still belonging to the utility model claim scope.In addition, summary part and title are only the use for auxiliary patent document search, are not used for limiting the interest field of the utility model.
Claims (7)
1. the AC compounent pick-up unit of a direct supply, it is characterized in that, comprise successively connect for interchange separation module that DC signal is separated with AC compounent electric signal, for ac signal is converted to the signal conversion module of digital signal, for by digital data transmission to the photoelectric isolation module of master chip, for the AC compounent signal detecting and default alarm numerical value being contrasted and exporting the master chip of control signal, alarm module for reception control signal outputting alarm while presetting alarm numerical value when AC compounent signal exceedes; The input end of described interchange separation module is connected with DC bus.
2. the AC compounent pick-up unit of a kind of direct supply according to claim 1; it is characterized in that; the output terminal of described master chip is also connected with photoelectric isolation module and RS485 communication module in turn, and the output terminal of described RS485 communication module is connected with host computer or protection equipment moving device.
3. the AC compounent pick-up unit of a kind of direct supply according to claim 1, is characterized in that, the input end of described interchange separation module is provided with the JP1 port for connecting DC bus.
4. the AC compounent pick-up unit of a kind of direct supply according to claim 3, is characterized in that, the PAND of described JP1 port is connected with ground.
5. the AC compounent pick-up unit of a kind of direct supply according to claim 1, is characterized in that, described alarm module comprises sound and/or light alarm module.
6. the AC compounent pick-up unit of a kind of direct supply according to claim 1, is characterized in that, described alarm module is provided with alarm relay.
7. the AC compounent pick-up unit of a kind of direct supply according to claim 6, is characterized in that, described alarm relay output terminal is provided with the JP2 interface for outputting alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320723651.4U CN203595753U (en) | 2013-11-15 | 2013-11-15 | Alternating-current component detection device for direct-current power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320723651.4U CN203595753U (en) | 2013-11-15 | 2013-11-15 | Alternating-current component detection device for direct-current power supply |
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| CN203595753U true CN203595753U (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320723651.4U Expired - Fee Related CN203595753U (en) | 2013-11-15 | 2013-11-15 | Alternating-current component detection device for direct-current power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459291A (en) * | 2014-12-15 | 2015-03-25 | 南车株洲电力机车有限公司 | Method and system for detecting AC signals of specific frequency |
| CN113075534A (en) * | 2021-03-31 | 2021-07-06 | 维沃移动通信有限公司 | Power chip detection circuit, power chip detection method and device and electronic equipment |
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
-
2013
- 2013-11-15 CN CN201320723651.4U patent/CN203595753U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459291A (en) * | 2014-12-15 | 2015-03-25 | 南车株洲电力机车有限公司 | Method and system for detecting AC signals of specific frequency |
| CN113075534A (en) * | 2021-03-31 | 2021-07-06 | 维沃移动通信有限公司 | Power chip detection circuit, power chip detection method and device and electronic equipment |
| WO2022206646A1 (en) * | 2021-03-31 | 2022-10-06 | 维沃移动通信有限公司 | Power source chip testing circuit, power source chip testing method and apparatus, and electronic device |
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
| CN113740756B (en) * | 2021-07-30 | 2024-04-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power state monitoring method and direct current test power supply |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140514 Termination date: 20161115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |