CN205231703U - System based on optics current transformer improve reliability of relay protection - Google Patents
System based on optics current transformer improve reliability of relay protection Download PDFInfo
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- CN205231703U CN205231703U CN201520984068.8U CN201520984068U CN205231703U CN 205231703 U CN205231703 U CN 205231703U CN 201520984068 U CN201520984068 U CN 201520984068U CN 205231703 U CN205231703 U CN 205231703U
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- relay protection
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Abstract
System based on optics current transformer improve reliability of relay protection includes: host system, signal acquisition module, executable module, these several modules are used for the mode of the system that supplementary optics current transformer OCT improves reliability of relay protection, and host system includes the TMS32 chip, the signal acquisition module includes light sensor, the executable module includes DA converter and light receiving unit. The utility model discloses there is not TA saturation problem, effectively reduces the problem of digitization system sensor end CT saturation simultaneously, optics mutual -inductor output be data signal, convenient in data communication, and have anti -electromagnetic interference nature, the light signal of the collection of surveying is endlessly by external disturbance, therefore can improve relaying protection system's reliability.
Description
Technical field
The utility model relates to field of power, concrete a kind of system improved reliability of relay protection based on optical current mutual inductor (OCT).
Background technology
In electric power development process, the relaying protection of electric power system is its part and parcel, and as the subsystem of electric power system, the responsibility of relaying protection system is exactly the operational reliability of protection electrical network, also will be responsible for the safety ensureing primary circuit.It sensitively can learn when electrical network primary line pipeline equipment breaks down that information is also excised to correct quick-action, isolated fault region, to ensure the safe and reliable of mains supply.Therefore the reliability improving relaying protection system becomes even more important; usually adopt instrument transformer in the voltage of the process layer of relaying protection system system, current signal sensor part, we greatly can improve the reliability of relaying protection system by proving optical current mutual inductor (OCT).Compare with electronic mutual inductor with traditional electromagnetic transformer, it there will not be, and CT is saturated and AT is saturated, and what it exported in addition is digital signal, is more convenient for the communication of data compared with analog signal.In addition, optical current mutual inductor (OCT) also has not easily by outer signals interference, good instantaneous value sampling differential protective value etc.Therefore, optical current mutual inductor (OCT) greatly can improve the reliability of relaying protection system.
Utility model content
The utility model object is to provide a kind of system improved reliability of relay protection based on optical current mutual inductor OCT, to improve the reliability of relaying protection system.The utility model provides a kind of scheme improving relaying protection system reliability for this reason.
For the utility model that achieves the above object solves the technical scheme that its technical problem adopts be: a kind of system reliability of relay protection improved based on optical current mutual inductor OCT, comprise main control module, signal acquisition module, Executive Module, these modules are used for auxiliary optical current transformer OCT to the mode of operation of the system that reliability of relay protection improves, and main control module comprises TMS32 chip; Signal acquisition module comprises optical sensor; Executive Module comprises D/A converter and light receiving unit.Annexation between each module is that signal acquisition module is connected with main control module by A/D converter, in Executive Module, D/A conversion is connected with main control module by the I/O interface of expansion, data processing unit in main control module passes to the digital relay protection interface of relaying protection system after being processed by the signal that optical sensor transmits and then output digit signals has OCT to export, simultaneously analog signal will be delivered to D/A modular converter by expansion I/O mouth and then send filtering and amplifying circuit to by data processing unit, OCT outputting analog signal is passed through again by filtering and amplifying circuit.
Described optical sensor module is the change information first change related information of the linearly polarized light anglec of rotation being converted into light intensity physical quantity by analyzer, then utilizes photodetector light signal is become the signal of telecommunication and then measured signal is passed to main control module.
The utility model is directed to and solves traditional electromagnetic transformer and the defect problem existing for electronic mutual inductor, and then for improving the reliability of relaying protection system.
The utility model advantage be following some: one, there is not TA saturation problem in the utility model, reduces the saturated problem of digitization system sensor side CT simultaneously effectively.Two, the utility model optical transformer export be digital signal, be convenient to data communication, and there is the character of electromagnetism interference, institute detect collection light signal endlessly by external interference, therefore can improve the reliability of relaying protection system.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model OCT fundamental diagram
Accompanying drawing 2 is the utility model OCT system data processing unit hardware structure diagrams
Accompanying drawing 3 is Interface realization figure of the utility model OCT and protective relaying device
Embodiment
Below in conjunction with accompanying drawing 1 with accompanying drawing 2 pairs of the utility model are a kind of is described further the specific structural features of the system that reliability of relay protection improves and implementation and the effect that reaches based on optical current mutual inductor OCT.
OCT system data processing unit hardware structure diagram a kind of system reliability of relay protection improved based on optical current mutual inductor OCT as shown in Figure 2, comprise: main control module, signal acquisition module, Executive Module, these modules are used for auxiliary optical current transformer OCT to the mode of operation of the system that reliability of relay protection improves, and main control module comprises TMS32 chip; Signal acquisition module comprises optical sensor; Executive Module comprises D/A converter and light receiving unit.Annexation between each module is that signal acquisition module is connected with main control module by A/D converter, in Executive Module, D/A conversion is connected with main control module by the I/O interface of expansion, data processing unit in main control module passes to the digital relay protection interface of relaying protection system after being processed by the signal that optical sensor transmits and then output digit signals has OCT to export, simultaneously analog signal will be delivered to D/A modular converter by expansion I/O mouth and then send filtering and amplifying circuit to by data processing unit, OCT outputting analog signal is passed through again by filtering and amplifying circuit.The measurement thinking of utility model works process: OCT is exactly by detecting the polarised light anglec of rotation, just can obtaining electric current.The anglec of rotation of closed light path is only with closed circuit interior current related, and therefore optical transformer anti-electromagnetic interference capability is better than other active electronic instrument transformer, can not be delayed surveying work by extraneous circuit high order harmonic component.The change related information of the linearly polarized light anglec of rotation, by analyzer, is first converted into the change information of light intensity physical quantity, then utilizes photodetector that light signal is become the signal of telecommunication by OCT.The signal of telecommunication is also that main control module carries out amplifying and sampling processing by embedded digital circuit subsequently; in the hope of accurately reflecting original current information; signal after process is exported by OCT by main control module again; send the light receiving unit of protective relaying device to, and then realize the raising to relaying protection system reliability.
Claims (2)
1. system reliability of relay protection improved based on optical current mutual inductor, comprise main control module, signal acquisition module, Executive Module, these modules are used for auxiliary optical current transformer OCT to the mode of operation of the system that reliability of relay protection improves, and main control module comprises TMS32 chip, signal acquisition module comprises optical sensor, Executive Module comprises D/A converter and light receiving unit, annexation between each module is that signal acquisition module is connected with main control module by A/D converter, in Executive Module, D/A conversion is connected with main control module by the I/O interface of expansion, data processing unit in main control module passes to the digital relay protection interface of relaying protection system after being processed by the signal that optical sensor transmits and then output digit signals has OCT to export, simultaneously analog signal will be delivered to D/A modular converter by expansion I/O mouth and then send filtering and amplifying circuit to by data processing unit, OCT outputting analog signal is passed through again by filtering and amplifying circuit.
2. a kind of system reliability of relay protection improved based on optical current mutual inductor according to claim 1; it is characterized in that: described optical sensor module; be the change information first change related information of the linearly polarized light anglec of rotation being converted into light intensity physical quantity by analyzer, then utilize photodetector light signal is become the signal of telecommunication and then measured signal is passed to main control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520984068.8U CN205231703U (en) | 2015-11-30 | 2015-11-30 | System based on optics current transformer improve reliability of relay protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520984068.8U CN205231703U (en) | 2015-11-30 | 2015-11-30 | System based on optics current transformer improve reliability of relay protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205231703U true CN205231703U (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520984068.8U Expired - Fee Related CN205231703U (en) | 2015-11-30 | 2015-11-30 | System based on optics current transformer improve reliability of relay protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205231703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026049A (en) * | 2016-07-25 | 2016-10-12 | 国网山东省电力公司聊城供电公司 | Differential protection device based on optical current transformer |
| CN112285458A (en) * | 2020-09-30 | 2021-01-29 | 国家电网公司华北分部 | Flexible direct current line traveling wave protection testing device |
-
2015
- 2015-11-30 CN CN201520984068.8U patent/CN205231703U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026049A (en) * | 2016-07-25 | 2016-10-12 | 国网山东省电力公司聊城供电公司 | Differential protection device based on optical current transformer |
| CN106026049B (en) * | 2016-07-25 | 2018-10-16 | 国网山东省电力公司聊城供电公司 | Differential protection based on optical current mutual inductor |
| CN112285458A (en) * | 2020-09-30 | 2021-01-29 | 国家电网公司华北分部 | Flexible direct current line traveling wave protection testing device |
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Legal Events
| 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: 20160511 Termination date: 20161130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |