CN218629966U - Transformer substation current monitoring system, circuit and device - Google Patents
Transformer substation current monitoring system, circuit and device Download PDFInfo
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- CN218629966U CN218629966U CN202222883348.2U CN202222883348U CN218629966U CN 218629966 U CN218629966 U CN 218629966U CN 202222883348 U CN202222883348 U CN 202222883348U CN 218629966 U CN218629966 U CN 218629966U
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Abstract
The utility model provides a transformer substation current monitoring system, which comprises a current sensor, wherein the first output end of the current sensor CT is respectively connected with the cathode of a diode D1, the anode of a diode D2, the positive input end of an amplifier U1A, the negative input end of an amplifier U1B and the output end of the amplifier U1B; a positive phase input end of the amplifier U1B is respectively connected with a first end of the resistor R3, a first end of the resistor R4 and a first end of the capacitor C1, a second end of the resistor R3 and a second end of the capacitor C1 are respectively connected with a power ground, and a second end of the resistor R4 is connected with +5V power voltage; the positive power supply terminal of the amplifier U1B is connected to the +5V supply voltage, and the negative power supply terminal of the amplifier U1B is connected to the power supply ground.
Description
Technical Field
The utility model relates to a transformer substation technical field especially relates to a transformer substation's current monitoring system.
Background
The box-type substation is one of electric power equipment commonly used in urban power distribution networks, and the performance of the box-type substation determines whether a user can obtain stable and reliable power supply. The current parameters belong to key indexes for measuring the running state of the box-type substation, and when the load changes and the equipment fails, the current changes correspondingly, so that the current signal in the box-type substation is accurately monitored, and whether the running state of the box-type substation is normal or not can be judged in time.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the technical problem who exists among the prior art at least, creatively provide a transformer substation's current monitoring system very much.
In order to achieve the above object of the present invention, the present invention provides a transformer substation current monitoring circuit, which includes a current sensor, wherein a first output end of the current sensor CT is respectively connected to a negative electrode of a diode D1, a positive electrode of a diode D2, a positive input end of an amplifier U1A, a negative input end of an amplifier U1B, and an output end of the amplifier U1B;
a positive phase input end of the amplifier U1B is respectively connected with a first end of the resistor R3, a first end of the resistor R4 and a first end of the capacitor C1, a second end of the resistor R3 and a second end of the capacitor C1 are respectively connected with a power ground, and a second end of the resistor R4 is connected with +5V power voltage; the positive power supply end of the amplifier U1B is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1B is connected with the power supply ground;
the output second end of the current sensor CT is respectively connected with the anode of the diode D1, the cathode of the diode D2, the first end of the resistor R1 and the first end of the resistor R2, the positive power supply end of the amplifier U1A is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1A is connected with the power supply ground; the second end of the resistor R1 is connected with the inverting input end of the amplifier U1A and the first end of the capacitor C2 respectively, and the second end of the resistor R2 is connected with the second end of the capacitor C2 and the output end of the amplifier U1A respectively; the output terminal of the amplifier U1A is a current monitoring output terminal.
In a preferred embodiment of the present invention, the current sensor CT is an ac transformer.
In a preferred embodiment of the present invention, the system further comprises a controller U2 and a display screen U4;
the current monitoring end of the controller U2 is connected with the output end of the amplifier U1A, and the data display end of the controller U2 is connected with the display screen U4, so that the monitored current value is displayed.
In a preferred embodiment of the present invention, the system further comprises a wireless transceiver module U3 and a cloud platform;
and a data transceiving end of the controller U2 is connected with the wireless transceiving module U3, so that the monitored current value is transmitted to the cloud platform through the wireless transceiving module U3.
In a preferred embodiment of the present invention, the wireless transceiver module U3 includes one or any combination of a 3G wireless transceiver unit, a 4G wireless transceiver unit, a 5G wireless transceiver unit, and a WiFi wireless transceiver unit;
the 3G wireless transceiver unit links to each other with the data 3G transceiver end of controller U2, and the 4G wireless transceiver unit links to each other with the data 4G transceiver end of controller U2, and the 5G wireless transceiver unit links to each other with the data 5G transceiver end of controller U2, and the WiFi wireless transceiver unit links to each other with the data WiFi transceiver end of controller U2.
In a preferred embodiment of the present invention, the amplifier U1A and the amplifier U1B are op07 amplifiers, and the controller U2 is a stm32f103c8t6 single chip microcomputer.
The utility model also discloses a current monitoring system of transformer substation arranges the current sensor CT in the current monitoring circuit of transformer substation in and treats the monitoring point, and this monitoring point treats the monitoring current monitoring point for the transformer substation, realizes the monitoring to the interior electric current of transformer substation.
The utility model also discloses a transformer substation current monitoring device, which comprises a housing, be provided with the PCB circuit board fixed mounting seat that is used for fixed mounting PCB circuit board in the casing, PCB circuit board fixed mounting is on PCB circuit board fixed mounting seat, be provided with the display screen fixed mounting seat that is used for fixed mounting display screen on the casing, display screen fixed mounting is on display screen fixed mounting seat, the normal phase input end that is provided with amplifier U1B on PCB circuit board links to each other with the first end of resistance R3, the first end of resistance R4 and the first end of electric capacity C1 respectively, the second end of resistance R3 and the second end of electric capacity C1 link to each other with the power ground respectively, the second end of resistance R4 links to each other with +5V mains voltage; the positive power supply end of the amplifier U1B is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1B is connected with the power supply ground; the second end of the resistor R1 is connected with the inverting input end of the amplifier U1A and the first end of the capacitor C2 respectively, the positive power supply end of the amplifier U1A is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1A is connected with the power supply ground; the second end of the resistor R2 is connected with the second end of the capacitor C2 and the output end of the amplifier U1A respectively; the current monitoring end of the controller U2 is connected with the output end of the amplifier U1A, and the data display end of the controller U2 is connected with the display screen U4; the data transceiving end of the controller U2 is connected with the wireless transceiving module U3; the cathode of the diode D1, the anode of the diode D2, the positive-phase input end of the amplifier U1A, the inverting-phase input end of the amplifier U1B and the output end of the amplifier U1B are respectively connected with the first output end of the current sensor CT; the anode of the diode D1, the cathode of the diode D2, the first end of the resistor R1 and the first end of the resistor R2 are respectively connected with the second output end of the current sensor CT; the current sensor CT is arranged on the outer wall of the shell.
In a preferred embodiment of the present invention, the casing is a rectangular casing and is made of plastic.
To sum up, owing to adopted above-mentioned technical scheme, the utility model discloses can realize monitoring the electric current in the transformer substation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of the circuit connection of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
The utility model provides a transformer substation current monitoring circuit, which comprises a current sensor, wherein the first output end of the current sensor CT is respectively connected with the cathode of a diode D1, the anode of a diode D2, the positive input end of an amplifier U1A, the negative input end of an amplifier U1B and the output end of the amplifier U1B;
a positive phase input end of the amplifier U1B is respectively connected with a first end of the resistor R3, a first end of the resistor R4 and a first end of the capacitor C1, a second end of the resistor R3 and a second end of the capacitor C1 are respectively connected with a power ground, and a second end of the resistor R4 is connected with +5V power voltage; the positive power supply end of the amplifier U1B is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1B is connected with the power supply ground;
the output second end of the current sensor CT is respectively connected with the anode of the diode D1, the cathode of the diode D2, the first end of the resistor R1 and the first end of the resistor R2, the positive power supply end of the amplifier U1A is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1A is connected with the power supply ground; the second end of the resistor R1 is connected with the inverting input end of the amplifier U1A and the first end of the capacitor C2 respectively, and the second end of the resistor R2 is connected with the second end of the capacitor C2 and the output end of the amplifier U1A respectively; the output terminal of the amplifier U1A is a current monitoring output terminal. In this embodiment, the current sensor CT is an ac transformer, the amplifiers U1A and U1B are op07 amplifiers, the controller U2 is a stm32f103c8t6 single chip microcomputer, the resistance of the resistor R3 is 3K, the resistance of the resistor R4 is 7K, the resistance of the resistor R2 is 100 Ω, and the resistance of the resistor R1 is 17 Ω. The amplifier U1A and the resistor R2 form an I/V conversion circuit, the R1 and the C2 play a role in filtering, and the diode D1 and the diode D2 play a role in protection. Amplifier U1B provides a low impedance dc bias of 1.5V as a reference for current sensors CT and U1A. When the current is 0, the voltage value input to the controller U2 is 1.5V, and when the current is present, the voltage input to the controller U2 is an ac signal based on 1.5V.
In a preferred embodiment of the present invention, the system further comprises a controller U2 and a display screen U4;
the current monitoring end of the controller U2 is connected with the output end of the amplifier U1A, and the data display end of the controller U2 is connected with the display screen U4, so that the monitored current value is displayed.
In a preferred embodiment of the present invention, the system further comprises a wireless transceiver module U3 and a cloud platform;
the data receiving and transmitting end of the controller U2 is connected with the wireless receiving and transmitting module U3, and the monitored current value is transmitted to the cloud platform through the wireless receiving and transmitting module U3.
In a preferred embodiment of the present invention, the wireless transceiving module U3 comprises one or any combination of a 3G wireless transceiving unit, a 4G wireless transceiving unit, a 5G wireless transceiving unit, and a WiFi wireless transceiving unit;
the 3G wireless transceiver unit links to each other with the data 3G transceiver end of controller U2, and the 4G wireless transceiver unit links to each other with the data 4G transceiver end of controller U2, and the 5G wireless transceiver unit links to each other with the data 5G transceiver end of controller U2, and the WiFi wireless transceiver unit links to each other with the data WiFi transceiver end of controller U2.
The utility model also discloses a transformer substation's current monitoring system arranges the current sensor CT in the current monitoring circuit of transformer substation in and treats the monitoring point, and this monitoring point treats the monitoring current monitoring point for the transformer substation, realizes the monitoring to the interior electric current of transformer substation.
The utility model also discloses a transformer substation current monitoring device, which comprises a housing, be provided with the PCB circuit board fixed mounting seat that is used for fixed mounting PCB circuit board in the casing, PCB circuit board fixed mounting is on PCB circuit board fixed mounting seat, be provided with the display screen fixed mounting seat that is used for fixed mounting display screen on the casing, display screen fixed mounting is on display screen fixed mounting seat, the normal phase input end that is provided with amplifier U1B on PCB circuit board links to each other with the first end of resistance R3, the first end of resistance R4 and the first end of electric capacity C1 respectively, the second end of resistance R3 and the second end of electric capacity C1 link to each other with the power ground respectively, the second end of resistance R4 links to each other with +5V mains voltage; the positive power supply end of the amplifier U1B is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1B is connected with the power supply ground; the second end of the resistor R1 is connected with the inverting input end of the amplifier U1A and the first end of the capacitor C2 respectively, the positive power supply end of the amplifier U1A is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1A is connected with the power supply ground; the second end of the resistor R2 is connected with the second end of the capacitor C2 and the output end of the amplifier U1A respectively; the current monitoring end of the controller U2 is connected with the output end of the amplifier U1A, and the data display end of the controller U2 is connected with the display screen U4; the data transceiving end of the controller U2 is connected with the wireless transceiving module U3; the cathode of the diode D1, the anode of the diode D2, the positive-phase input end of the amplifier U1A, the inverting-phase input end of the amplifier U1B and the output end of the amplifier U1B are respectively connected with the first output end of the current sensor CT; the anode of the diode D1, the cathode of the diode D2, the first end of the resistor R1 and the first end of the resistor R2 are respectively connected with the output second end of the current sensor CT; the current sensor CT is arranged on the outer wall of the shell.
In a preferred embodiment of the present invention, the casing is a rectangular casing and is made of plastic.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A transformer substation current monitoring circuit is characterized by comprising a current sensor, wherein the first output end of a current sensor CT is respectively connected with the cathode of a diode D1, the anode of a diode D2, the positive input end of an amplifier U1A, the inverting input end of an amplifier U1B and the output end of the amplifier U1B;
a positive phase input end of the amplifier U1B is respectively connected with a first end of the resistor R3, a first end of the resistor R4 and a first end of the capacitor C1, a second end of the resistor R3 and a second end of the capacitor C1 are respectively connected with a power ground, and a second end of the resistor R4 is connected with +5V power voltage; the positive power supply end of the amplifier U1B is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1B is connected with the power supply ground;
the second output end of the current sensor CT is respectively connected with the anode of the diode D1, the cathode of the diode D2, the first end of the resistor R1 and the first end of the resistor R2, the positive power supply end of the amplifier U1A is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1A is connected with the power supply ground; the second end of the resistor R1 is connected with the inverting input end of the amplifier U1A and the first end of the capacitor C2 respectively, and the second end of the resistor R2 is connected with the second end of the capacitor C2 and the output end of the amplifier U1A respectively; the output end of the amplifier U1A is a current monitoring output end.
2. The substation current monitoring circuit according to claim 1, wherein the current sensor CT is an ac transformer.
3. The substation current monitoring circuit according to claim 1, further comprising a controller U2 and a display screen U4;
the current monitoring end of the controller U2 is connected with the output end of the amplifier U1A, and the data display end of the controller U2 is connected with the display screen U4, so that the monitored current value is displayed.
4. The substation current monitoring circuit according to claim 3, further comprising a wireless transceiver module U3 and a cloud platform;
the data receiving and transmitting end of the controller U2 is connected with the wireless receiving and transmitting module U3, and the monitored current value is transmitted to the cloud platform through the wireless receiving and transmitting module U3.
5. The substation current monitoring circuit according to claim 4, wherein the wireless transceiver module U3 comprises one or any combination of a 3G wireless transceiver unit, a 4G wireless transceiver unit, a 5G wireless transceiver unit and a WiFi wireless transceiver unit;
the 3G wireless transceiver unit links to each other with the data 3G transceiver end of controller U2, and the 4G wireless transceiver unit links to each other with the data 4G transceiver end of controller U2, and the 5G wireless transceiver unit links to each other with the data 5G transceiver end of controller U2, and the WiFi wireless transceiver unit links to each other with the data WiFi transceiver end of controller U2.
6. The substation current monitoring circuit according to claim 3, wherein the amplifier U1A and the amplifier U1B are op07 amplifiers, and the controller U2 is a stm32f103c8t6 single chip microcomputer.
7. A transformer substation current monitoring system is characterized in that a current sensor CT in a transformer substation current monitoring circuit according to any one of claims 1 to 6 is arranged at a point to be monitored, and the monitoring point is a current monitoring point to be monitored of a transformer substation, so that the current in the transformer substation is monitored.
8. A current monitoring device of a transformer substation comprises a shell and is characterized in that a PCB fixed mounting seat for fixedly mounting a PCB is arranged in the shell, the PCB is fixedly mounted on the PCB fixed mounting seat, a display screen fixed mounting seat for fixedly mounting a display screen is arranged on the shell, the display screen is fixedly mounted on the display screen fixed mounting seat, a positive phase input end of an amplifier U1B arranged on the PCB is respectively connected with a first end of a resistor R3, a first end of a resistor R4 and a first end of a capacitor C1, a second end of the resistor R3 and a second end of the capacitor C1 are respectively connected with a power ground, and a second end of the resistor R4 is connected with +5V power voltage; the positive power supply end of the amplifier U1B is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1B is connected with the power supply ground; the second end of the resistor R1 is connected with the inverting input end of the amplifier U1A and the first end of the capacitor C2 respectively, the positive power supply end of the amplifier U1A is connected with +5V power supply voltage, and the negative power supply end of the amplifier U1A is connected with the power supply ground; the second end of the resistor R2 is connected with the second end of the capacitor C2 and the output end of the amplifier U1A respectively; the current monitoring end of the controller U2 is connected with the output end of the amplifier U1A, and the data display end of the controller U2 is connected with the display screen U4; the data transceiving end of the controller U2 is connected with the wireless transceiving module U3; the cathode of the diode D1, the anode of the diode D2, the positive-phase input end of the amplifier U1A, the inverting-phase input end of the amplifier U1B and the output end of the amplifier U1B are respectively connected with the first output end of the current sensor CT; the anode of the diode D1, the cathode of the diode D2, the first end of the resistor R1 and the first end of the resistor R2 are respectively connected with the second output end of the current sensor CT; the current sensor CT is arranged on the outer wall of the shell.
9. The substation current monitoring device according to claim 8, wherein the housing is a rectangular housing and is made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222883348.2U CN218629966U (en) | 2022-10-31 | 2022-10-31 | Transformer substation current monitoring system, circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222883348.2U CN218629966U (en) | 2022-10-31 | 2022-10-31 | Transformer substation current monitoring system, circuit and device |
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| Publication Number | Publication Date |
|---|---|
| CN218629966U true CN218629966U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222883348.2U Active CN218629966U (en) | 2022-10-31 | 2022-10-31 | Transformer substation current monitoring system, circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218629966U (en) |
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- 2022-10-31 CN CN202222883348.2U patent/CN218629966U/en active Active
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