CN213658878U - Switching value optical fiber remote transmission circuit structure - Google Patents
Switching value optical fiber remote transmission circuit structure Download PDFInfo
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- CN213658878U CN213658878U CN202022835907.3U CN202022835907U CN213658878U CN 213658878 U CN213658878 U CN 213658878U CN 202022835907 U CN202022835907 U CN 202022835907U CN 213658878 U CN213658878 U CN 213658878U
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- 230000005540 biological transmission Effects 0.000 title claims description 72
- 239000013307 optical fiber Substances 0.000 title claims description 62
- 238000006243 chemical reaction Methods 0.000 claims abstract description 41
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 230000003287 optical effect Effects 0.000 claims description 36
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 10
- 239000000835 fiber Substances 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model relates to a power equipment switch signal processing technology field is a switching value optic fibre teletransmission circuit structure, including at least one switching value optic fibre teletransmission circuit, switching value optic fibre teletransmission circuit includes sends conversion circuit, light receiving conversion circuit, two-stage reversal circuit and is provided with the treater of serial ports, the serial ports that sets up on the treater includes serial ports TXD and serial ports RXD, and serial ports TXD passes through the two-stage reversal circuit and sends conversion circuit to be connected, and serial ports RXD is connected with light receiving conversion circuit. The utility model has the advantages of reasonable and compact structure, convenient to use through switching value optic fibre teletransmission circuit structure's use, can make single relay protection testing arrangement compromise analog quantity and switching value to just can accomplish the maintenance of whole return circuit in the transformer substation through single relay protection testing arrangement. The method can be widely applied to the scene that the switching value and the analog quantity need to be tested at intervals, and the effective manpower and material resources in the testing process are simplified.
Description
Technical Field
The utility model relates to a power equipment switch signal processing technology field is a switching value optic fibre teletransmission circuit structure.
Background
With the development of modern technology, an electric power system enters an era of an intelligent substation, the popularization and development of a digital substation are typical characteristics of the period, the digital substation is constructed by layering intelligent primary equipment (an electronic transformer, an intelligent switch and the like) and networked secondary equipment (a process layer, a bay layer and a station control layer), and the digital substation is established on the basis of IEC61850 standard and communication specifications and can realize information sharing and interoperation between intelligent electric equipment in the substation.
The layered structure of the digital station is characterized in that voltage and current signals input through a secondary sampling cable are transmitted to relay protection equipment on a spacer layer through an electronic transformer through a merging unit and an optical fiber network, the original signal quantity transmitted by the secondary cable such as a switching position, a locking signal, a protection and measurement and control tripping and closing command is realized through integrated intelligent primary equipment, and the mode conversion brings a problem to the maintenance work of a digital transformer substation.
The switch of the interlayer equipment, the process layer equipment and the intelligent primary equipment needs to be subjected to overall inspection during maintenance, the relay protection device of the interlayer, the merging unit of the process layer, the intelligent I/O equipment is dispersed at different intervals, the physical interval is far, the relay protection test device is usually equipment integrated analog quantity output and switching quantity output, the switching quantity is input into a whole, a single relay protection test device cannot detect the function of the whole loop at the same time, multiple sets of cooperation either need to build a complex test network or need to operate multiple persons at the same time, and the time scales of multiple test devices needing to participate in the process are unified, so that the action verification of the whole loop can be carried out.
Disclosure of Invention
The utility model provides a switching value optic fibre teletransmission circuit structure has overcome above-mentioned prior art not enough, and it can effectively solve the unable single relay protection testing arrangement of letting that current digital transformer substation test mode exists and compromise analog quantity and switching value, and the unable single problem of accomplishing the maintenance.
The technical scheme of the utility model is realized through following measure: a switching value optical fiber remote transmission circuit structure comprises at least one switching value optical fiber remote transmission circuit, wherein the switching value optical fiber remote transmission circuit comprises an optical transmission conversion circuit, an optical receiving conversion circuit, a two-stage reverse circuit and a processor provided with a serial port, the serial port arranged on the processor comprises a serial port TXD and a serial port RXD, the serial port TXD is connected with the optical transmission conversion circuit through the two-stage reverse circuit, and the serial port RXD is connected with the optical receiving conversion circuit.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the device further comprises a 485 conversion unit, wherein the 485 conversion unit comprises a magnetic coupling isolator and a 485 converter, the processor is connected with the magnetic coupling isolator through a serial port TXD and a serial port RXD respectively, and the magnetic coupling isolator is connected with the 485 converter.
The device also comprises a switching value input circuit, and the switching value input circuit is connected with the processor.
The switching value output circuit is connected with the processor.
The switch value optical fiber remote transmission circuit comprises two switch value optical fiber remote transmission circuits which are connected through optical fibers, and the relay protection testing device is connected with one of the switch value optical fiber remote transmission circuits.
The utility model has reasonable and compact structure and convenient use, and ensures that a single relay protection testing device can take analog quantity and switching quantity into account by using the switching quantity optical fiber remote transmission circuit structure, thereby using the single relay protection testing device to complete the maintenance of the whole loop in the transformer substation, being widely applied to the scene of cross-interval testing required for the switching quantity and the analog quantity, and simplifying the effective manpower and material resources in the testing process; and two switching value optic fibre teletransmission circuits pass through fiber connection, transmission rate improves greatly, and transmission rate can reach 20M speed, far exceeds traditional serial port communication speed's bottleneck, and transmission distance is far away and be difficult for receiving the interference, simultaneously the utility model discloses switching value output circuit's the action time of opening is about 0.1 to 0.2ms, compares with the action time about 5ms of traditional electromagnetic relay, and action rate improves by a wide margin, has reduced the influence of action delay to maintenance work, for the action delay of maintenance switch position dozens of ms, can ignore almost.
Drawings
Fig. 1 is a schematic structural diagram of a switching value optical fiber remote transmission circuit in embodiment 1 of the present invention.
Fig. 2 is a schematic circuit diagram of the optical transmission conversion circuit according to embodiment 1 of the present invention.
Fig. 3 is a schematic circuit diagram of the optical receiver/converter circuit according to embodiment 1 of the present invention.
Fig. 4 is a schematic circuit structure diagram of a 485 conversion unit in embodiment 1 of the present invention.
Fig. 5 is a schematic circuit diagram of a switching value input circuit according to embodiment 1 of the present invention.
Fig. 6 is a schematic circuit diagram of a switching value output circuit in embodiment 1 of the present invention.
Fig. 7 is a schematic structural diagram of embodiment 1 of the present invention.
Detailed Description
The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.
The invention will be further described with reference to the following examples and drawings:
in embodiment 1, as shown in fig. 1, 2, and 3, the switching value optical fiber remote transmission circuit structure includes at least one switching value optical fiber remote transmission circuit, where the switching value optical fiber remote transmission circuit includes an optical transmission conversion circuit, an optical reception conversion circuit, a two-stage reversal circuit, and a processor provided with a serial port, where the serial port provided on the processor includes a serial port TXD and a serial port RXD, the serial port TXD is connected to the optical transmission conversion circuit through the two-stage reversal circuit, and the serial port RXD is connected to the optical reception conversion circuit.
In the technical scheme, the optical transmitting conversion circuit and the optical receiving conversion circuit are connected with a relay protection testing device, and the processor is connected with a tested device on a process layer; the relay protection testing device sequentially applies analog quantity to a tested device through the light receiving and converting circuit and the processor, and sequentially receives remote transmission switching quantity of a process layer through the processor, the two-stage reverse circuit and the light sending and converting circuit. Wherein the processor may be a microprocessor.
In the above technical solution, the optical transmitting and converting circuit is shown in fig. 2 and is configured to convert TTL level signals into optical signals, and the optical receiving and converting circuit is shown in fig. 3 and is configured to convert optical signals into TTL level signals. The two stages of inverting circuits are arranged to match and receive the logic of the loop on the one hand and to enhance the driving capability on the other hand.
When a digital transformer substation is tested, two switching value optical fiber remote transmission circuits can be connected together through optical fibers; one switching value optical fiber remote transmission circuit is arranged on a process layer, a processor of the switching value optical fiber remote transmission circuit is connected with a switching value output unit and a switching value input unit of a tested device, the other switching value optical fiber remote transmission circuit is arranged on a spacer layer, and the processor of the switching value optical fiber remote transmission circuit is connected with a relay protection testing device, so that the switching value of the relay protection testing device is extended to a far end, an analog quantity can be applied to the tested device at the far end, and the switching value of the tested device can also be obtained.
To sum up the utility model discloses can make single relay protection testing arrangement compromise analog quantity and switching value, just can accomplish the maintenance of whole return circuit in the transformer substation through single relay protection testing arrangement. Therefore, the method is widely applied to scenes in which cross-interval testing is needed for switching values and analog quantities, and effective manpower and material resources in the testing process are simplified; and the two switching value optical fiber remote transmission circuits are connected through optical fibers, the error introduced by the whole loop is within 1ms and can be basically ignored, and the test result is not influenced.
The structure of the switching value optical fiber remote transmission circuit can be further optimized or/and improved according to actual needs:
as shown in fig. 4, the wireless sensor further comprises a 485 conversion unit, wherein the 485 conversion unit comprises a magnetic coupling isolator and a 485 converter, the processor is connected with the magnetic coupling isolator through a serial port TXD and a serial port RXD, and the magnetic coupling isolator is connected with the 485 converter.
In the technical scheme, the 485 conversion unit is additionally arranged between the processor and the optical transmission conversion circuit and the optical receiving conversion circuit, so that the optical transmission conversion circuit and the optical receiving conversion circuit can be used for certain short-distance switching value remote transmission scenes instead of the functions of the optical transmission conversion circuit and the optical receiving conversion circuit, and can be used for monitoring when optical signals are used for switching value remote transmission.
As shown in fig. 1 and 5, the circuit further comprises a switching value input circuit, and the switching value input circuit is connected with the processor.
In the technical scheme, an I/O pin of the processor is connected with an output end of the switching value input circuit, the switching value input circuit collects the displacement of the external switching value, and the external switching value displacement starting light is sent back to the remote transmission circuit to be switched in the displacement.
As shown in fig. 1 and 6, the circuit further comprises a switching value output circuit, and the switching value output circuit is connected with the processor.
Among the above-mentioned technical scheme, the I/O pin of treater links to each other with switching value output circuit's input, and switching value output circuit can adopt quick opto-coupler relay AQW214S, and it is about 0.1 to 0.2ms to open the action time, compares with the action time of traditional electromagnetic relay about 5ms, and action speed improves by a wide margin, has reduced the time delay that turns into switching value output after the switching value input teletransmission.
As shown in fig. 7, the device further comprises a relay protection testing device, two switching value optical fiber remote transmission circuits are provided, the two switching value optical fiber remote transmission circuits are connected through optical fibers, and the relay protection testing device is connected with one of the switching value optical fiber remote transmission circuits.
The two switching value optical fiber remote transmission circuits in the technical scheme are set as a first switching value optical fiber remote transmission circuit and a second switching value optical fiber remote transmission circuit, the first switching value optical fiber remote transmission circuit is connected with a relay protection testing device, the second switching value optical fiber remote transmission circuit is connected with a tested device, and when the tested device is an intelligent I/O device, the practical application is as follows:
1. when a relay protection testing device at a testing end needs to apply switching value to an intelligent I/O device in a remote station, the relay protection testing device normally sets the switching value, the switching value is converted into switching value displacement information in an optical signal form by a switching value input circuit, a processor and an optical transmission conversion circuit in a first switching value optical fiber remote transmission circuit in sequence, the optical signal is transmitted to an optical receiving conversion circuit of a second switching value optical fiber remote transmission circuit through optical fiber, the switching value is obtained by conversion, and the switching value displacement information is applied to the intelligent I/O device at the station end through the processor and a switching value output circuit of the second switching value optical fiber remote transmission circuit in sequence;
2. when an intelligent I/O device in a remote station needs to apply a switching value to a relay protection testing device at a testing end, the intelligent I/O device in the remote station outputs the switching value to a switching value input circuit of a second switching value optical fiber remote transmission circuit, the switching value input circuit and an optical transmission conversion circuit sequentially convert the switching value into switching value displacement information in an optical signal form through a processor and the optical transmission conversion circuit of the second switching value optical fiber remote transmission circuit, the optical signal is transmitted to an optical receiving conversion circuit of a first switching value optical fiber remote transmission circuit through an optical fiber, the switching value is obtained through conversion, and the switching value displacement information sequentially passes through the processor and the switching value output circuit of the first switching value optical fiber remote transmission circuit and is applied to the relay protection testing device at the testing end.
Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.
Claims (8)
1. A switching value optical fiber remote transmission circuit structure is characterized by comprising at least one switching value optical fiber remote transmission circuit, wherein the switching value optical fiber remote transmission circuit comprises an optical transmission conversion circuit, an optical receiving conversion circuit, a two-stage reverse circuit and a processor provided with a serial port, the serial port arranged on the processor comprises a serial port TXD and a serial port RXD, the serial port TXD is connected with the optical transmission conversion circuit through the two-stage reverse circuit, and the serial port RXD is connected with the optical receiving conversion circuit.
2. The switching value optical fiber remote transmission circuit structure according to claim 1, further comprising a 485 conversion unit, wherein the 485 conversion unit comprises a magnetic coupling isolator and a 485 converter, the processor is connected with the magnetic coupling isolator through a serial port TXD and a serial port RXD respectively, and the magnetic coupling isolator is connected with the 485 converter.
3. The switching value optical fiber remote transmission circuit structure according to claim 1 or 2, further comprising a switching value input circuit, wherein the switching value input circuit is connected with the processor.
4. The switching value optical fiber remote transmission circuit structure according to claim 1 or 2, further comprising a switching value output circuit, wherein the switching value output circuit is connected with the processor.
5. The switching value optical fiber remote transmission circuit structure according to claim 3, further comprising a switching value output circuit, wherein the switching value output circuit is connected to the processor.
6. The switching value optical fiber remote transmission circuit structure according to claim 1, 2 or 5, further comprising two switching value optical fiber remote transmission circuits, wherein the two switching value optical fiber remote transmission circuits are connected through an optical fiber, and the relay protection test device is connected with one of the switching value optical fiber remote transmission circuits.
7. The switching value optical fiber remote transmission circuit structure according to claim 3, further comprising two relay protection test devices, wherein the two switching value optical fiber remote transmission circuits are connected through an optical fiber, and the relay protection test device is connected with one of the switching value optical fiber remote transmission circuits.
8. The switching value optical fiber remote transmission circuit structure according to claim 4, further comprising two relay protection test devices, wherein the two switching value optical fiber remote transmission circuits are connected through an optical fiber, and the relay protection test device is connected with one of the switching value optical fiber remote transmission circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022835907.3U CN213658878U (en) | 2020-12-01 | 2020-12-01 | Switching value optical fiber remote transmission circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022835907.3U CN213658878U (en) | 2020-12-01 | 2020-12-01 | Switching value optical fiber remote transmission circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213658878U true CN213658878U (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022835907.3U Active CN213658878U (en) | 2020-12-01 | 2020-12-01 | Switching value optical fiber remote transmission circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213658878U (en) |
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2020
- 2020-12-01 CN CN202022835907.3U patent/CN213658878U/en active Active
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