CN211347162U - High-low voltage switch cabinet fault early warning device - Google Patents
High-low voltage switch cabinet fault early warning device Download PDFInfo
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- CN211347162U CN211347162U CN202020365647.5U CN202020365647U CN211347162U CN 211347162 U CN211347162 U CN 211347162U CN 202020365647 U CN202020365647 U CN 202020365647U CN 211347162 U CN211347162 U CN 211347162U
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- early warning
- resistor
- operational amplifier
- low voltage
- switch cabinet
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Abstract
The utility model discloses a high-low voltage switch cabinet fault early warning device, including temperature detect circuit and wireless early warning circuit, temperature detect circuit is including setting up at the inside temperature sensor P1 of high-low voltage switch cabinet, temperature sensor P1's output signal is through MOS pipe Q1 enlargies the back, send into the compensation of enlargiing in the fortune ware AR1, adopt fortune ware AR2 to carry out feedback control to fortune ware AR 1's output signal simultaneously, reduce and enlarge the error, send into microprocessor after the AD conversion at last, microprocessor samples and data comparison analysis to the temperature detect signal, send early warning signal when the abnormal data appears, wireless early warning circuit modulates back teletransmission to surveillance center to the early warning signal, the utility model discloses high to high-low voltage switch cabinet temperature detection precision, the device interference killing feature is strong, accurate reliable is down in the early warning.
Description
Technical Field
The utility model relates to a high-low voltage switch cabinet protection technical field especially relates to a high-low voltage switch cabinet trouble early warning device.
Background
The high-low voltage switch cabinet is an important power device in a power system, and the operation reliability of the high-low voltage switch cabinet is related to the safety and stability of the whole power grid and the reliability of urban power supply. The installation process of the switch cabinet has problems, for example, in the processing, connection and installation links of the bus, the contact resistance value of the bus is increased invisibly due to unsmooth and uneven bus surface, no special power grease and the like, so that the heating is caused. Meanwhile, in the long-term operation process of the high-low voltage switch cabinet, the temperature rise of power equipment such as the joints of contacts and bus bars in the equipment due to aging or overlarge load current can finally cause sudden power failure and even fire accidents, and therefore the overheating fault of the high-low voltage switch cabinet needs to be pre-warned.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, an object of the utility model is to provide a high-low voltage switch cabinet fault early warning device.
The technical scheme for solving the problem is as follows: the utility model provides a high-low voltage switch cabinet trouble early warning device, includes temperature detect circuit and wireless early warning circuit, temperature detect circuit is including setting up the inside temperature sensor of high-low voltage switch cabinet, temperature sensor's output signal is after MOS pipe Q1 enlargies, send into the compensation of enlargiing in the fortune ware AR1, adopt fortune ware AR2 to carry out feedback regulation to fortune ware AR 1's output signal simultaneously, reduce the error of enlargiing, send into microprocessor after the AD conversion at last, microprocessor is used for sampling and data comparison analysis to temperature detect signal, sends early warning signal when unusual data appears, wireless early warning circuit is right long-range transmission to surveillance center after early warning signal modulates.
Furthermore, the temperature detection circuit further comprises a resistor R1, one end of the resistor R1 is connected with a signal output end of the temperature sensor, the other end of the resistor R1 is connected with one end of a capacitor C1, one end of a resistor R2 and a grid electrode of an MOS transistor Q1, the other ends of the capacitor C1 and the resistor R2 are grounded in parallel with a source electrode of the MOS transistor Q1, and a drain electrode of the MOS transistor Q1 is connected with a +5V power supply through the resistor R3 and is connected with a non-inverting input end of an operational amplifier AR1 through a capacitor C3.
Further, an inverting input end of the operational amplifier AR1 is connected to an output end of the operational amplifier AR1 through a resistor R4 and a capacitor C4 which are connected in parallel, and is grounded through a resistor R5, an output end of the operational amplifier AR1 is connected to an non-inverting input end of the a/D converter and the operational amplifier AR2 through a resistor R6, and an inverting input end and an output end of the operational amplifier AR2 are connected to a non-inverting input end of the operational amplifier AR1 through a resistor R7.
Further, the wireless early warning circuit comprises an operational amplifier AR3, wherein a non-inverting input terminal of the operational amplifier AR3 is connected with an early warning signal output terminal of the microprocessor, an inverting input terminal and an output terminal of the operational amplifier AR3 are connected with a base electrode of a triode VT1 through a resistor R8, an emitter electrode of the triode VT1 is grounded through a resistor R9 and a capacitor C6 which are connected in parallel, a collector electrode of the triode VT1 is connected with a +24V power supply through a capacitor C5 and an inductor L1 which are connected in parallel, and is connected with a signal transmitter E1 through a capacitor C7.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a temperature sensor P1 detects the temperature of high-low voltage switch cabinet inside, and temperature sensor P1's output signal is after MOS pipe Q1 enlargies, send into fortune and put ware AR1 in the compensation of enlargiing, adopts fortune to put ware AR2 to carry out feedback control to fortune and put ware AR 1's output signal simultaneously, reduces and enlargies the error, and the temperature detection precision is high, and the device interference killing feature is strong;
2. the microprocessor is adopted to sample the temperature detection signals and compare and analyze the data, when abnormal data occurs, the wireless early warning circuit sends out early warning signals, the wireless early warning circuit modulates the early warning signals and then remotely transmits the early warning signals to the monitoring center, and early warning issuing is accurate and reliable.
Drawings
Fig. 1 is a schematic diagram of the temperature detection circuit of the present invention.
Fig. 2 is the utility model discloses wireless early warning circuit schematic diagram.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a high-low voltage switch cabinet trouble early warning device, including temperature detect circuit and wireless early warning circuit, temperature detect circuit is including setting up the temperature sensor P1 in high-low voltage switch cabinet inside, temperature sensor P1's output signal enlargies the back through MOS pipe Q1, send into the compensation of enlargiing in the fortune ware AR1, adopt fortune ware AR2 to carry out feedback control to fortune ware AR 1's output signal simultaneously, reduce the error of amplification, send into in the microprocessor after the AD conversion at last. The microprocessor is used for sampling the temperature detection signals and comparing and analyzing the data, sending out early warning signals when abnormal data occur, and the wireless early warning circuit modulates the early warning signals and then remotely transmits the early warning signals to the monitoring center.
In order to improve the accuracy of detecting the internal temperature of the high-low voltage switch cabinet, as shown in fig. 1, the temperature detection circuit further includes a resistor R1, one end of the resistor R1 is connected to the signal output end of the temperature sensor P1, the other end of the resistor R1 is connected to the capacitor C1, one end of the resistor R2 and the gate of the MOS transistor Q1, the other ends of the capacitor C1 and the resistor R2 and the source of the MOS transistor Q1 are grounded in parallel, the drain of the MOS transistor Q1 is connected to a +5V power supply through a resistor R3, and is connected to the non-inverting input end of the operational amplifier AR1 through a capacitor C3. The resistor R1 and the capacitor C1 form an RC filter to perform low-pass filtering processing on a detection signal of the temperature sensor P1, high-frequency signal interference generated by equipment operation is reduced, and then the MOS tube Q1 is used for amplifying the detection signal, so that the signal amplification has good temperature characteristics.
Because the temperature detection signal is easy to generate signal imbalance in the amplification process, the amplification process is adjusted by adopting the dual operational amplifier feedback adjustment of the operational amplifiers AR1 and AR 2. The inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R4 and a capacitor C4 which are connected in parallel, and is grounded through a resistor R5, the output end of the operational amplifier AR1 is connected with the non-inverting input end of the A/D converter and the non-inverting input end of the operational amplifier AR2 through a resistor R6, and the inverting input end and the output end of the operational amplifier AR2 are connected with the non-inverting input end of the operational amplifier AR1 through a resistor R7. The operational amplifier AR1 carries out operational amplification processing on an output signal of the MOS transistor Q1, and the resistor R4 and the capacitor C4 form resistance-capacitance feedback phase compensation in the operational amplification process of the operational amplifier AR1, so that the temperature detection signal output is more stable, and the system error is reduced. Meanwhile, the operational amplifier AR2 performs positive feedback adjustment on the output signal of the operational amplifier AR1, so that the input offset voltage of the operational amplifier AR1 is reduced, and the accuracy of temperature detection is greatly improved.
As shown in fig. 2, the wireless warning circuit includes an operational amplifier AR3, a non-inverting input terminal of the operational amplifier AR3 is connected to a warning signal output terminal of the microprocessor, an inverting input terminal and an output terminal of the operational amplifier AR3 are connected to a base of a transistor VT1 through a resistor R8, an emitter of the transistor VT1 is grounded through a parallel resistor R9 and a capacitor C6, a collector of the transistor VT1 is connected to a +24V power supply through a parallel capacitor C5 and an inductor L1, and is connected to a signal transmitter E1 through a capacitor C7. The operational amplifier AR3 isolates and outputs the early warning signal output by the microprocessor by using the voltage follower principle, the transmission capability of the early warning signal is effectively improved, then the early warning signal is sent into the triode VT1 for power amplification, the capacitor C5 and the inductor L1 form parallel resonance in the power amplification process to modulate the early warning signal, the resistor R9 and the capacitor C6 form RC filtering to play a stabilizing role in outputting the early warning signal, and finally the early warning signal is sent into the signal transmitter E1 for transmission after being coupled by the capacitor C7.
The utility model discloses when specifically using, can adopt multiunit temperature detection circuit to carry out the synchronous monitoring to the different regions of high-low voltage switch cabinet to all send into microprocessor after the AD conversion with the detected signal after handling. The microprocessor carries out timing sampling and comparative analysis processing on the detection data, and when abnormal data occur due to overheating in the high-low voltage switch cabinet, the microprocessor sends out an early warning signal with certain frequency at the output end of the microprocessor, and the process is mature prior art and is not detailed herein. The wireless early warning circuit remotely transmits the early warning signal after isolating and outputting the early warning signal and modulating the signal to a monitoring center, thereby realizing the purpose of remotely early warning the overheating fault of the high-low voltage switch cabinet.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. The utility model provides a high-low voltage switch cabinet trouble early warning device, includes temperature detect circuit and wireless early warning circuit, its characterized in that: the temperature detection circuit is including setting up the inside temperature sensor of high-low voltage switch cabinet, temperature sensor's output signal is through MOS pipe Q1 enlargies the back, send into fortune and put the ware AR1 in the compensation of enlargiing, adopts fortune to put the ware AR2 simultaneously and carry out feedback control to fortune and put the output signal of ware AR1, reduces and enlargies the error, sends into microprocessor after AD conversion at last, microprocessor is arranged in sampling and data comparison analysis the temperature detection signal, sends early warning signal when unusual data appear, wireless early warning circuit is right long-range transmission to surveillance center after the early warning signal modulates.
2. The high-low voltage switch cabinet fault early warning device according to claim 1, characterized in that: the temperature detection circuit further comprises a resistor R1, one end of the resistor R1 is connected with a signal output end of the temperature sensor, the other end of the resistor R1 is connected with one end of a capacitor C1 and one end of a resistor R2 and a grid electrode of a MOS tube Q1, the other ends of the capacitor C1 and the resistor R2 and a source electrode of the MOS tube Q1 are grounded in parallel, and a drain electrode of the MOS tube Q1 is connected with a +5V power supply through the resistor R3 and is connected with a non-inverting input end of an operational amplifier AR1 through a capacitor C3.
3. The high-low voltage switch cabinet fault early warning device according to claim 2, characterized in that: the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R4 and a capacitor C4 which are connected in parallel, and is grounded through a resistor R5, the output end of the operational amplifier AR1 is connected with the non-inverting input ends of the A/D converter and the operational amplifier AR2 through a resistor R6, and the inverting input end and the output end of the operational amplifier AR2 are connected with the non-inverting input end of the operational amplifier AR1 through a resistor R7.
4. The high-low voltage switch cabinet fault early warning device according to claim 3, characterized in that: the wireless early warning circuit comprises an operational amplifier AR3, wherein the non-inverting input end of the operational amplifier AR3 is connected with the early warning signal output end of the microprocessor, the inverting input end and the output end of the operational amplifier AR3 are connected with the base electrode of a triode VT1 through a resistor R8, the emitter electrode of the triode VT1 is grounded through a resistor R9 and a capacitor C6 which are connected in parallel, the collector electrode of the triode VT1 is connected with a +24V power supply through a capacitor C5 and an inductor L1 which are connected in parallel, and is connected with a signal transmitter E1 through a capacitor C7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020365647.5U CN211347162U (en) | 2020-03-21 | 2020-03-21 | High-low voltage switch cabinet fault early warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020365647.5U CN211347162U (en) | 2020-03-21 | 2020-03-21 | High-low voltage switch cabinet fault early warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211347162U true CN211347162U (en) | 2020-08-25 |
Family
ID=72104886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020365647.5U Expired - Fee Related CN211347162U (en) | 2020-03-21 | 2020-03-21 | High-low voltage switch cabinet fault early warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211347162U (en) |
-
2020
- 2020-03-21 CN CN202020365647.5U patent/CN211347162U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200825 Termination date: 20210321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |