CN213817216U - Power-based isolation transformer protection device - Google Patents
Power-based isolation transformer protection device Download PDFInfo
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- CN213817216U CN213817216U CN202022207695.4U CN202022207695U CN213817216U CN 213817216 U CN213817216 U CN 213817216U CN 202022207695 U CN202022207695 U CN 202022207695U CN 213817216 U CN213817216 U CN 213817216U
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- 238000002955 isolation Methods 0.000 title claims abstract description 51
- 238000011217 control strategy Methods 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 229910000896 Manganin Inorganic materials 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009545 invasion Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The utility model provides a power-based isolation transformer protection device, which comprises a power acquisition module, a controllable switch and a controller, wherein the power acquisition module and the controllable switch are sequentially connected in series between a power input end and a primary side of an isolation transformer, and the controller is respectively electrically connected with the power acquisition module; the power acquisition module is used for acquiring a real-time power value input to the primary side of the isolation transformer through a power input end and uploading the real-time power value to the controller; and the controller controls the switch of the controllable switch according to the received real-time power value and a preset control strategy. The utility model has the advantages of easily realize and the security performance is high.
Description
Technical Field
The utility model relates to a transformer protection device, specific theory has related to an isolation transformer protection device based on power.
Background
A high-speed railway natural disaster and foreign body invasion monitoring system is an important component of a railway information system, monitors wind, rain and snow along a high-speed railway and foreign body invasion of an overpass road, and provides disaster early warning, alarm information and operation and maintenance suggestions for high-speed railway operation. Wind, rain and snow monitoring is an important component module of a high-speed railway natural disaster and foreign matter invasion monitoring system, and if a fault occurs, the processing flow is complex, the time is long, and the influence is large. The isolation transformer is used as an important device for externally outputting power in wind, rain and snow monitoring, and the safety of the isolation transformer is very important.
However, the isolation transformer has a small input impedance and a large power-on impact, so that a fuse is easily burnt out or an air switch is tripped during power-on and lightning impact of a system, and a continuous power supply cannot be provided for a subsequent device, so that a good protection effect cannot be achieved by using the fuse or the air switch. Meanwhile, due to the existence of the internal resistance of the isolation transformer, after the secondary short circuit, the primary side is not provided with reasonable protective equipment, so that the isolation transformer can work beyond the rated capacity, continuously generate heat and even cause fire.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the not enough of prior art to a high, easy operation's isolation transformer protection device based on power is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a power-based isolation transformer protection device comprises a power acquisition module, a controllable switch and a controller, wherein the power acquisition module and the controllable switch are sequentially connected in series between a power input end and a primary side of an isolation transformer, and the controller is respectively electrically connected with the power acquisition module;
the power acquisition module is used for acquiring a real-time power value input to the primary side of the isolation transformer through a power input end and uploading the real-time power value to the controller;
and the controller controls the switch of the controllable switch according to the received real-time power value and a preset control strategy.
Based on the above, the power acquisition module comprises a voltage acquisition circuit, a CT current acquisition circuit, a manganin current acquisition circuit and an electric quantity acquisition circuit, the voltage acquisition circuit is used for acquiring real-time voltage input to the primary side of the isolation transformer through a power input end, the CT current acquisition circuit is used for acquiring real-time zero line current of alternating current input to the primary side of the isolation transformer through a power supply input end, the manganin current acquisition circuit is used for acquiring real-time live wire current of alternating current input to the primary side of the isolation transformer through a power input end, the electric quantity acquisition circuit is respectively connected with the voltage acquisition circuit, the CT current acquisition circuit and the manganin current acquisition circuit, and calculating the real-time power value input to the primary side of the isolation transformer according to the real-time voltage, the real-time zero line current and the real-time live line current.
Based on the above, the power acquisition device further comprises a digital isolation circuit, wherein the digital isolation circuit is connected in series between the power acquisition module and the controller to realize isolation between the power acquisition module and the controller.
Based on the above, the controllable switch includes a photoelectric coupler and a bidirectional thyristor, a main electrode T1 of the bidirectional thyristor and a main electrode T2 of the bidirectional thyristor are connected in series between the live line and the zero line of the ac input, and a control electrode of the bidirectional thyristor is connected to the controller through the photoelectric coupler.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the utility model, the real-time power value output to the isolation transformer is collected by the power collection module, the collected power value is sent to the controller, and the controller controls whether the controllable switch is disconnected according to the set power threshold value and the control strategy, thereby having the advantages of easy realization and high safety; meanwhile, the controllable switch is arranged in the double-circuit, double disconnection is safer, the double-circuit can be repeatedly used, and manual participation is not needed when the double-circuit is opened or closed.
Drawings
Fig. 1 is a schematic block diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of the voltage acquisition circuit of the present invention.
Fig. 3 is a schematic diagram of the CT current collection circuit of the present invention.
Fig. 4 is a schematic diagram of the manganin current collection circuit of the present invention.
Fig. 5 is a schematic diagram of the power acquisition circuit of the present invention.
Fig. 6 is a schematic diagram of the digital isolation circuit of the present invention.
Fig. 7 is a schematic diagram of the controller of the present invention.
Fig. 8 is a schematic diagram of the controllable switch of the present invention.
Fig. 9 is a schematic diagram of a power module according to the present invention.
Fig. 10 is a schematic block diagram of embodiment 2 of the present invention
Fig. 11 is a schematic diagram of a communication module of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
The embodiment provides a power-based isolation transformer protection device, as shown in fig. 1, which includes a power acquisition module, a controllable switch and a controller, where the power acquisition module and the controllable switch are sequentially connected in series between a power input end and a primary side of an isolation transformer, and the controller is electrically connected to the power acquisition module respectively;
the power acquisition module is used for acquiring a real-time power value input to the primary side of the isolation transformer through a power input end and uploading the real-time power value to the controller;
and the controller controls the switch of the controllable switch according to the received real-time power value and a preset control strategy.
Specifically, the power acquisition module comprises a voltage acquisition circuit, a CT current acquisition circuit, a manganin current acquisition circuit and an electric quantity acquisition circuit, the voltage acquisition circuit is used for acquiring real-time voltage input to the primary side of the isolation transformer through a power input end, the CT current acquisition circuit is used for acquiring real-time zero line current of alternating current input to the primary side of the isolation transformer through a power supply input end, the manganin current acquisition circuit is used for acquiring real-time live wire current of alternating current input to the primary side of the isolation transformer through a power input end, the electric quantity acquisition circuit is respectively connected with the voltage acquisition circuit, the CT current acquisition circuit and the manganin current acquisition circuit, and calculating the real-time power value input to the primary side of the isolation transformer according to the real-time voltage, the real-time zero line current and the real-time live line current.
Fig. 2 to 5 are specific implementation circuits of the voltage acquisition circuit, the CT current acquisition circuit, the manganin current acquisition circuit, and the electricity acquisition circuit, respectively, where the electricity acquisition circuit includes an RN8209D chip, V1P and VIN pins of the RN8209D chip are used for receiving a real-time live line current value of the manganin current acquisition circuit, V2P and V2N pins of the RN8209D chip are used for receiving a real-time neutral line current value of the CT current acquisition circuit, and V3P and V3N pins of the RN8209D chip are used for receiving a real-time voltage value of the voltage acquisition circuit.
Specifically, the power acquisition device further comprises a digital isolation circuit, wherein the digital isolation circuit is connected in series between the power acquisition module and the controller to realize isolation between the power acquisition module and the controller. As shown in fig. 6, for a specific implementation circuit of the digital isolation circuit, the analog signal output by the power acquisition module is optically coupled and converted into a digital signal by 6N137S (TA) and sent to the controller.
As shown in fig. 7, a specific embodiment of the controller is shown, and in the implementation circuit, the controller adopts STM32F103C8T 6.
Specifically, the controllable switch includes a photoelectric coupler and a bidirectional thyristor, a main electrode T1 of the bidirectional thyristor and a main electrode T2 of the bidirectional thyristor are connected in series between the live line and the zero line of the ac input, and a control electrode of the bidirectional thyristor is connected to the controller through the photoelectric coupler. As shown in fig. 8, the specific implementation circuit of the controllable switch is shown, the bidirectional thyristor is a BTA16-600B, the photocoupler is a MOC3201, a POW CTL pin of the controller is connected to a cathode of the MOC3201 through an N-channel triode, an anode of the MOC3201 is connected to a +5V power supply, and the MOC3201 is connected to a control electrode of the BTA 16-600B.
Specifically, the power supply device further comprises a power supply module, wherein the power supply module is used for providing working voltage for the power acquisition module and the controller. As shown in fig. 9, which is a specific implementation circuit of the power module, ac power is converted into +5V dc power by LEDs 05-23B05, and is converted into +3.3V dc power by AMS1117-3.3 voltage regulation chip; the +5V direct current is converted into a DVCC-5V digital power supply through F0505XT-2WR2, and the DVCC-5V digital power supply is converted into an AVCC-5V analog power supply through voltage stabilization and filtering.
The device comprises a controller, an MCU starting debugging circuit and a USB debugging interface, wherein the MCU starting debugging circuit is connected with the controller and is used for realizing the starting debugging of the MCU; the USB debugging interface is connected with the controller and used for realizing the function debugging of the controller.
Example 2
The present embodiment is different from the embodiment in that: as shown in fig. 10, the power management system further includes a communication module, connected to the controller, and configured to send a remote control instruction to the controller and send a real-time power value received by the controller. Specifically, the communication module is a CAN communication module, and as shown in fig. 11, the CAN communication module includes a CAN/TIA1051T/3 chip.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. The utility model provides an isolation transformer protection device based on power which characterized in that: the power acquisition module and the controllable switch are sequentially connected in series between a power input end and a primary side of an isolation transformer, and the controller is electrically connected with the power acquisition module respectively;
the power acquisition module is used for acquiring a real-time power value input to the primary side of the isolation transformer through a power input end and uploading the real-time power value to the controller;
and the controller controls the switch of the controllable switch according to the received real-time power value and a preset control strategy.
2. The power-based isolation transformer protection device of claim 1, wherein: the power acquisition module comprises a voltage acquisition circuit, a CT current acquisition circuit, a manganin current acquisition circuit and an electric quantity acquisition circuit, the voltage acquisition circuit is used for acquiring real-time voltage input to the primary side of the isolation transformer through a power input end, the CT current acquisition circuit is used for acquiring real-time zero line current of alternating current input to the primary side of the isolation transformer through a power supply input end, the manganin current acquisition circuit is used for acquiring real-time live wire current of alternating current input to the primary side of the isolation transformer through a power input end, the electric quantity acquisition circuit is respectively connected with the voltage acquisition circuit, the CT current acquisition circuit and the manganin current acquisition circuit, and calculating the real-time power value input to the primary side of the isolation transformer according to the real-time voltage, the real-time zero line current and the real-time live line current.
3. The power-based isolation transformer protection device of claim 1 or 2, wherein: the power acquisition device further comprises a digital isolation circuit, wherein the digital isolation circuit is connected in series between the power acquisition module and the controller to realize isolation between the power acquisition module and the controller.
4. The power-based isolation transformer protection device of claim 1 or 2, wherein: the controller is connected with the communication module, and the communication module is connected with the controller and used for sending a remote control instruction to the controller and sending out the real-time power value received by the controller.
5. The power-based isolation transformer protection device of claim 1 or 2, wherein: the power supply module is used for providing working voltage for the power acquisition module and the controller.
6. The power-based isolation transformer protection device of claim 2, wherein: the controllable switch comprises a photoelectric coupler and a bidirectional thyristor, a main electrode T1 of the bidirectional thyristor and a main electrode T2 of the bidirectional thyristor are connected in series between a live wire and a zero line of the alternating current, and a control electrode of the bidirectional thyristor is connected with the controller through the photoelectric coupler.
7. The power-based isolation transformer protection device of claim 1 or 2, wherein: the MCU starting and debugging circuit is connected with the controller and is used for realizing the starting and debugging of the MCU; the USB debugging interface is connected with the controller and used for realizing the function debugging of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022207695.4U CN213817216U (en) | 2020-09-30 | 2020-09-30 | Power-based isolation transformer protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022207695.4U CN213817216U (en) | 2020-09-30 | 2020-09-30 | Power-based isolation transformer protection device |
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| Publication Number | Publication Date |
|---|---|
| CN213817216U true CN213817216U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022207695.4U Active CN213817216U (en) | 2020-09-30 | 2020-09-30 | Power-based isolation transformer protection device |
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| CN (1) | CN213817216U (en) |
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- 2020-09-30 CN CN202022207695.4U patent/CN213817216U/en active Active
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Effective date of registration: 20240428 Address after: 450001 No.188, science Avenue, high tech Industrial Development Zone, Zhengzhou City, Henan Province Patentee after: HENAN SPLENDOR SCIENCE & TECHNOLOGY Co.,Ltd. Country or region after: China Patentee after: HENAN HUIHUANG SOFTWARE CO.,LTD. Address before: 450001 No.188, science Avenue, high tech Industrial Development Zone, Zhengzhou City, Henan Province Patentee before: HENAN SPLENDOR SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |