CN214150844U - Insulator leakage current monitoring system - Google Patents
Insulator leakage current monitoring system Download PDFInfo
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- CN214150844U CN214150844U CN202023135489.3U CN202023135489U CN214150844U CN 214150844 U CN214150844 U CN 214150844U CN 202023135489 U CN202023135489 U CN 202023135489U CN 214150844 U CN214150844 U CN 214150844U
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Abstract
The utility model provides a pair of insulator leakage current monitoring system, including leakage current mutual-inductor to insulator leakage current sampling and its output and first rectifier circuit's input are connected, first rectifier circuit's output and sampling circuit's input are connected, sampling circuit's input and analog-to-digital conversion circuit's input are connected, analog-to-digital conversion circuit's output and processing circuit are connected, processing circuit passes through wireless transmission circuit and remote host communication connection; the power-taking current transformer obtains power from a high-voltage line in an induction mode, the output end of the power-taking current transformer is connected with the input end of the second rectifying circuit, the output end of the second rectifying circuit is connected with the first input end of the switch control circuit, the first output end of the switch control circuit is connected with the first input end of the voltage stabilizing circuit, the second input end of the switch control circuit is connected with the anode of the storage battery, the second output end of the switch control circuit is connected with the second input end of the voltage stabilizing circuit, and real-time data can be continuously and stably obtained.
Description
Technical Field
The utility model relates to an insulation monitoring system especially relates to an insulator leakage current monitoring system.
Background
The insulator is an extremely important device in electric power, the insulation performance of the insulator influences the stable operation of an electric power system, and the insulation performance of the insulator is often represented by leakage current, and the larger the leakage current is, the worse the insulation performance is.
In the prior art, manual test is adopted for monitoring the leakage current of the insulator, and the mode has high danger, discontinuous monitoring data and difficulty in accurately making measures; although an online monitoring structure is also provided in the prior art, the existing online monitoring equipment has a complex structure and poor stability, and is difficult to ensure the stable monitoring of the leakage current of the insulator.
Therefore, in order to solve the above technical problems, it is necessary to provide a new technical means for solving the problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of insulator leakage current monitoring system can carry out real-time on-line monitoring and upload monitoring data in real time to the leakage current of insulator, does benefit to the insulating properties who judges the insulator according to real-time data, does benefit to and makes accurate fortune dimension measure, and whole monitoring system stable in structure is reliable moreover, can last steady operation, ensures continuity, the stability of data.
The utility model provides an insulator leakage current monitoring system, including leakage current transformer, first rectifier circuit, sampling circuit, analog-to-digital conversion circuit, get electric current transformer, second rectifier circuit, on-off control circuit, voltage stabilizing circuit, processing circuit, wireless transmission circuit, battery and battery management circuit;
the leakage current transformer samples the leakage current of the insulator, the output end of the leakage current transformer is connected with the input end of a first rectifying circuit, the output end of the first rectifying circuit is connected with the input end of a sampling circuit, the input end of the sampling circuit is connected with the input end of an analog-to-digital conversion circuit, the output end of the analog-to-digital conversion circuit is connected with a processing circuit, and the processing circuit is in communication connection with a remote host through a wireless transmission circuit;
the power-taking current transformer obtains power from a high-voltage line in an induction mode, the output end of the power-taking current transformer is connected with the input end of the second rectifying circuit, the output end of the second rectifying circuit is connected with the first input end of the switch control circuit, the first output end of the switch control circuit is connected with the first input end of the voltage stabilizing circuit, the second input end of the switch control circuit is connected with the anode of the storage battery, the second output end of the switch control circuit is connected with the second input end of the voltage stabilizing circuit, the input end of the storage battery management circuit is connected with the first output end of the switch control circuit, the output end of the storage battery management circuit is connected with the anode of the storage battery, and the storage battery management circuit is further in communication connection with the processing circuit.
Further, the sampling circuit comprises a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, an NMOS tube Q6, a voltage regulator tube D2, a capacitor C2, a capacitor C3, an operational amplifier U1 and an operational amplifier U2;
one end of a resistor R13 is used as an input end of a sampling circuit and connected to an output end of the rectifying circuit, the other end of a resistor R13 is connected with the same-phase end of an operational amplifier U1, the reverse end of the operational amplifier U1 is connected with the output end of the operational amplifier U1, the output end of the operational amplifier U1 is connected with the same-phase end of the operational amplifier U2 through a resistor R17, the reverse end of the operational amplifier U2 is grounded through a resistor R19, the reverse end of the operational amplifier U2 is connected with the output end of the operational amplifier U2 through a resistor R18, and the output end of the operational amplifier U2 is used as the output end of the sampling circuit;
the common connection point between the resistor R13 and the in-phase end of the operational amplifier U1 is grounded through a resistor R16, the common connection point between the resistor R13 and the in-phase end of the operational amplifier U1 is grounded through a capacitor C3, one end of the resistor R13 serving as the input end of the sampling circuit is grounded through a capacitor C2, the common connection point between the resistor R13 and the capacitor C2 is grounded after being connected in series with a resistor R15 through a resistor R14, the common connection point between the resistor R14 and the resistor R15 is connected with the negative electrode of a voltage regulator tube D2, the positive electrode of the voltage regulator tube 2 is connected with the gate of an NMOS tube Q6, the source of the NMOS tube Q6 is grounded, and the drain of the NMOS tube Q6 is connected with the common connection point between the resistor R13 and the capacitor C2.
Further, the switch control circuit comprises a power supply protection circuit and a switching circuit;
the input end of the power supply protection circuit is used as the first input end of the switch control circuit, the output end of the power supply protection circuit is used as the first output end of the switch control circuit, the input end of the switching circuit is used as the second input end of the switch control circuit, the output end of the switching circuit is used as the second output end of the switch control circuit, and the control end of the switching circuit is connected with the output end of the power supply protection circuit.
Further, the power supply protection circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R4, a voltage regulator tube D1, a triode Q1, a triode Q2 and a PMOS tube Q3;
one end of a resistor R1 is connected to one end of a resistor R7, the other end of a resistor R7 is grounded through a resistor R8, the other end of the resistor R1 is connected to the source electrode of a PMOS tube Q3, the common connection point of the resistor R1 and the resistor R7 serves as the input end of a power supply protection circuit, the common connection point of the resistor R7 and the resistor R8 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected to the base electrode of a triode Q2 through the resistor R9, and the emitter electrode of the triode Q2 is grounded;
the common connection point between the resistor R1 and the source of the PMOS tube Q3 is connected with one end of a resistor R3 through a resistor R2, the other end of the resistor R3 is grounded through a resistor R4, the collector of the triode Q2 is connected with the common connection point between the resistor R2 and the resistor R3, the base of the triode Q1 is connected with the common connection point between the resistor R3 and the resistor R4, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected with the gate of the PMOS tube Q3 through the resistor R6, the drain of the PMOS tube Q3 serves as the output end of the power supply protection circuit, and the source of the PMOS tube Q3 is connected with the gate of the PMOS tube Q3 through a resistor R5.
Further, the switching circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a capacitor C1, a triode Q5 and a PMOS tube Q4;
the source electrode of a PMOS tube Q4 is used as the input end of the switching circuit, the drain electrode of a PMOS tube Q4 is used as the output end of the switching circuit, the source electrode of a PMOS tube Q4 is connected with the grid electrode of a PMOS tube Q4 through a resistor R12, the grid electrode of a PMOS tube Q4 is grounded after being connected in parallel with a capacitor C1 through a resistor R13, the collector electrode of a triode Q5 is connected with the source electrode of a PMOS tube Q4, and the emitter electrode of the triode Q5 is connected with the grid electrode of a PMOS tube Q4; one end of the resistor R10 is used as a control end of the switching circuit, the other end of the resistor R10 is grounded through a resistor R11, and a common connection point of the resistor R10 and the resistor R11 is connected with a base electrode of the triode Q5.
Further, the first rectifying circuit and the second rectifying circuit are full-bridge rectifying circuits formed by diodes.
Further, the storage battery management circuit is a TP5400 battery management chip.
Further, the processing circuit is an STM32F101T6U6 chip.
Further, the voltage stabilizing circuit comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is used as the first input end of the voltage stabilizing circuit, the input end of the second voltage stabilizing circuit is connected with the output end of the first voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is used as the second input end of the voltage stabilizing circuit, the output end of the second voltage stabilizing circuit supplies power to the processing circuit, the analog-to-digital conversion circuit and the wireless transmission circuit, and the output end of the first voltage stabilizing circuit supplies power to the power end of the storage battery management circuit.
Further, the wireless transmission circuit is a 4G or 5G module.
The utility model has the advantages that: through the utility model discloses, can carry out real-time on-line monitoring and upload monitoring data in real time to the leakage current of insulator, do benefit to the insulating properties who judges the insulator according to real-time data, do benefit to and make accurate fortune dimension measure, whole monitoring system stable in structure is reliable moreover, can last steady operation, ensures continuity, the stability of data.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the sampling circuit of the present invention.
Fig. 3 is a schematic diagram of the switch control circuit of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings in the specification:
the utility model provides an insulator leakage current monitoring system, including leakage current transformer, first rectifier circuit, sampling circuit, analog-to-digital conversion circuit, get electric current transformer, second rectifier circuit, on-off control circuit, voltage stabilizing circuit, processing circuit, wireless transmission circuit, battery and battery management circuit;
the leakage current transformer samples the leakage current of the insulator, the output end of the leakage current transformer is connected with the input end of a first rectifying circuit, the output end of the first rectifying circuit is connected with the input end of a sampling circuit, the input end of the sampling circuit is connected with the input end of an analog-to-digital conversion circuit, the output end of the analog-to-digital conversion circuit is connected with a processing circuit, and the processing circuit is in communication connection with a remote host through a wireless transmission circuit;
the power-taking current transformer obtains power from a high-voltage line in an induction mode, the output end of the power-taking current transformer is connected with the input end of a second rectifying circuit, the output end of the second rectifying circuit is connected with the first input end of a switch control circuit, the first output end of the switch control circuit is connected with the first input end of a voltage stabilizing circuit, the second input end of the switch control circuit is connected with the anode of a storage battery, the second output end of the switch control circuit is connected with the second input end of the voltage stabilizing circuit, the input end of a storage battery management circuit is connected with the first output end of the switch control circuit, the output end of the storage battery management circuit is connected with the anode of the storage battery, and the storage battery management circuit is further in communication connection with a processing circuit; the first rectifying circuit and the second rectifying circuit are full-bridge rectifying circuits formed by diodes; the storage battery management circuit is a TP5400 battery management chip; the processing circuit is an STM32F101T6U6 chip; the wireless transmission circuit is a 4G or 5G module, and the analog-to-digital conversion circuit adopts an AD7273 chip;
wherein, the voltage stabilizing circuit comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is used as the first input end of the voltage stabilizing circuit, the input end of the second voltage stabilizing circuit is connected with the output end of the first voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is used as the second input end of the voltage stabilizing circuit, the output end of the second voltage stabilizing circuit supplies power to the processing circuit, the analog-digital conversion circuit and the wireless transmission circuit, the output end of the first voltage stabilizing circuit supplies power to the power end of the storage battery management circuit, the first voltage stabilizing circuit is an LM7809 voltage stabilizing chip, the second voltage stabilizing circuit is an LM7805 chip, the first voltage stabilizing circuit supplies charging voltage to the storage battery, the second voltage stabilizing circuit supplies working power for the operational amplifier in the processing circuit, the wireless transmission circuit, the analog-digital conversion circuit and the sampling circuit, and by the structure, the leakage current of the insulator can be monitored in real-time on line and the monitoring data can be uploaded in real-time, the insulator insulation performance can be judged according to real-time data, accurate operation and maintenance measures can be made, the whole monitoring system is stable and reliable in structure, continuous and stable operation can be achieved, and continuity and stability of data are guaranteed.
In this embodiment, the sampling circuit includes a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, an NMOS transistor Q6, a voltage regulator D2, a capacitor C2, a capacitor C3, an operational amplifier U1, and an operational amplifier U2;
one end of a resistor R13 is used as an input end of a sampling circuit and connected to an output end of the rectifying circuit, the other end of a resistor R13 is connected with the same-phase end of an operational amplifier U1, the reverse end of the operational amplifier U1 is connected with the output end of the operational amplifier U1, the output end of the operational amplifier U1 is connected with the same-phase end of the operational amplifier U2 through a resistor R17, the reverse end of the operational amplifier U2 is grounded through a resistor R19, the reverse end of the operational amplifier U2 is connected with the output end of the operational amplifier U2 through a resistor R18, and the output end of the operational amplifier U2 is used as the output end of the sampling circuit;
the common connection point between the resistor R13 and the non-inverting terminal of the operational amplifier U1 is grounded through a resistor R16, the common connection point between the resistor R13 and the non-inverting terminal of the operational amplifier U1 is grounded through a capacitor C3, one end of the resistor R13 serving as the input end of the sampling circuit is grounded through a capacitor C2, the common connection point between the resistor R13 and the capacitor C2 is grounded after being connected in series with a resistor R14 and a resistor R15, the common connection point between the resistor R14 and the resistor R15 is connected with the negative electrode of a voltage regulator D2, the positive electrode of the voltage regulator D2 is connected with the gate electrode of an NMOS tube Q6, the source electrode of the NMOS tube Q6 is grounded, the drain electrode of the NMOS tube Q6 is connected with the common connection point between the resistor R13 and the capacitor C2, when the leakage current is sampled, the instability of the leakage current itself, such as lightning current and the like, the damage of the used electric devices can be caused, the resistors R14, the voltage regulator D14, and the voltage regulator D14 is connected with a protection circuit, when the voltage regulator D14 is turned on, NMOS pipe Q6 switches on to carry out the short circuit to follow-up electric current, and then form overcurrent protection, moreover, the U1 of fortune is put and is formed a voltage follower, be used for carrying out high impedance isolation, play the guard action, resistance R16 and resistance R13 constitute partial pressure sampling circuit, U2, resistance R17, R18 and R19 constitute the proportion amplification circuit are put to fortune, thereby can accurately handle for follow-up circuit and provide the guarantee.
In this embodiment, the switch control circuit includes a power supply protection circuit and a switching circuit;
the input end of the power supply protection circuit is used as the first input end of the switch control circuit, the output end of the power supply protection circuit is used as the first output end of the switch control circuit, the input end of the switching circuit is used as the second input end of the switch control circuit, the output end of the switching circuit is used as the second output end of the switch control circuit, and the control end of the switching circuit is connected with the output end of the power supply protection circuit. In leakage current's monitoring, another aspect that influences stability is in the aspect of the power supply, has photovoltaic power supply in the tradition, receives environmental impact big, also has the mode of adopting online electricity-taking, but, current electricity-taking then stability is not enough, causes the component to damage when cable voltage fluctuates, consequently adopts the circuit in following in order to improve stability:
the power supply protection circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R4, a voltage regulator tube D1, a triode Q1, a triode Q2 and a PMOS tube Q3;
one end of a resistor R1 is connected to one end of a resistor R7, the other end of a resistor R7 is grounded through a resistor R8, the other end of the resistor R1 is connected to the source electrode of a PMOS tube Q3, the common connection point of the resistor R1 and the resistor R7 serves as the input end of a power supply protection circuit, the common connection point of the resistor R7 and the resistor R8 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected to the base electrode of a triode Q2 through the resistor R9, and the emitter electrode of the triode Q2 is grounded;
the common connection point between the resistor R1 and the source of the PMOS tube Q3 is connected with one end of a resistor R3 through a resistor R2, the other end of the resistor R3 is grounded through a resistor R4, the collector of the triode Q2 is connected with the common connection point between the resistor R2 and the resistor R3, the base of the triode Q1 is connected with the common connection point between the resistor R3 and the resistor R4, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected with the gate of the PMOS tube Q3 through the resistor R6, the drain of the PMOS tube Q3 serves as the output end of the power supply protection circuit, and the source of the PMOS tube Q3 is connected with the gate of the PMOS tube Q3 through a resistor R5.
The switching circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a capacitor C1, a triode Q5 and a PMOS (P-channel metal oxide semiconductor) transistor Q4;
the source electrode of a PMOS tube Q4 is used as the input end of the switching circuit, the drain electrode of a PMOS tube Q4 is used as the output end of the switching circuit, the source electrode of a PMOS tube Q4 is connected with the grid electrode of a PMOS tube Q4 through a resistor R12, the grid electrode of a PMOS tube Q4 is grounded after being connected in parallel with a capacitor C1 through a resistor R13, the collector electrode of a triode Q5 is connected with the source electrode of a PMOS tube Q4, and the emitter electrode of the triode Q5 is connected with the grid electrode of a PMOS tube Q4; one end of the resistor R10 is used as a control end of the switching circuit, the other end of the resistor R10 is grounded through a resistor R11, and a common connection point of the resistor R10 and the resistor R11 is connected with a base electrode of the triode Q5.
The power-taking current transformer takes power from a cable, the power is input into the power supply protection circuit after being rectified by the second rectifying circuit, if the voltage is normal, the triode Q1 is conducted, so that the PMOS tube Q3 is reversely biased, the PMOS tube Q3 is conducted, power is supplied to a subsequent circuit, at the moment, the triode Q5 is conducted, no voltage difference exists between the source electrode and the grid electrode of the PMOS tube Q4, the PMOS tube Q4 is cut off, and the storage battery VBAT does not supply power;
when the power-taking voltage is too high, the voltage-regulator tube D1 is conducted, the triode Q2 is conducted, at the moment, the triode Q1 is cut off, at the moment, the grid and source voltages of the PMOS tube Q3 are equal, and the PMOS tube Q3 is cut off, so that the online power supply is stopped; however, after the on-line power supply is cut off, the resistor R10 and the resistor R11 form a detection circuit, when the Q3 is cut off, the power supply protection circuit has no output, the triode Q5 is cut off, at this time, a voltage difference exists between the grid and the source of the PMOS transistor Q4 and is reversely biased, the PMOS transistor Q4 is turned on, and the storage battery supplies power, so that the continuity of the whole power supply is ensured, when the PMOS transistor Q3 is turned back on, the PMOS transistor Q4 is turned back off again, so that the automatic switching is completed, and a control chip is not required to be set externally.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (10)
1. The utility model provides an insulator leakage current monitoring system which characterized in that: the system comprises a leakage current transformer, a first rectifying circuit, a sampling circuit, an analog-to-digital conversion circuit, a power-taking current transformer, a second rectifying circuit, a switch control circuit, a voltage stabilizing circuit, a processing circuit, a wireless transmission circuit, a storage battery and a storage battery management circuit;
the leakage current transformer samples the leakage current of the insulator, the output end of the leakage current transformer is connected with the input end of a first rectifying circuit, the output end of the first rectifying circuit is connected with the input end of a sampling circuit, the input end of the sampling circuit is connected with the input end of an analog-to-digital conversion circuit, the output end of the analog-to-digital conversion circuit is connected with a processing circuit, and the processing circuit is in communication connection with a remote host through a wireless transmission circuit;
the power-taking current transformer obtains power from a high-voltage line in an induction mode, the output end of the power-taking current transformer is connected with the input end of the second rectifying circuit, the output end of the second rectifying circuit is connected with the first input end of the switch control circuit, the first output end of the switch control circuit is connected with the first input end of the voltage stabilizing circuit, the second input end of the switch control circuit is connected with the anode of the storage battery, the second output end of the switch control circuit is connected with the second input end of the voltage stabilizing circuit, the input end of the storage battery management circuit is connected with the first output end of the switch control circuit, the output end of the storage battery management circuit is connected with the anode of the storage battery, and the storage battery management.
2. The insulator leakage current monitoring system according to claim 1, wherein: the sampling circuit comprises a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19, an NMOS tube Q6, a voltage regulator tube D2, a capacitor C2, a capacitor C3, an operational amplifier U1 and an operational amplifier U2;
one end of a resistor R13 is used as an input end of a sampling circuit and connected to an output end of the rectifying circuit, the other end of a resistor R13 is connected with the same-phase end of an operational amplifier U1, the reverse end of the operational amplifier U1 is connected with the output end of the operational amplifier U1, the output end of the operational amplifier U1 is connected with the same-phase end of the operational amplifier U2 through a resistor R17, the reverse end of the operational amplifier U2 is grounded through a resistor R19, the reverse end of the operational amplifier U2 is connected with the output end of the operational amplifier U2 through a resistor R18, and the output end of the operational amplifier U2 is used as the output end of the sampling circuit;
the common connection point between the resistor R13 and the in-phase end of the operational amplifier U1 is grounded through a resistor R16, the common connection point between the resistor R13 and the in-phase end of the operational amplifier U1 is grounded through a capacitor C3, one end of the resistor R13 serving as the input end of the sampling circuit is grounded through a capacitor C2, the common connection point between the resistor R13 and the capacitor C2 is grounded after being connected in series with a resistor R15 through a resistor R14, the common connection point between the resistor R14 and the resistor R15 is connected with the negative electrode of a voltage regulator tube D2, the positive electrode of the voltage regulator tube 2 is connected with the gate of an NMOS tube Q6, the source of the NMOS tube Q6 is grounded, and the drain of the NMOS tube Q6 is connected with the common connection point between the resistor R13 and the capacitor C2.
3. The insulator leakage current monitoring system according to claim 1, wherein: the switch control circuit comprises a power supply protection circuit and a switching circuit;
the input end of the power supply protection circuit is used as the first input end of the switch control circuit, the output end of the power supply protection circuit is used as the first output end of the switch control circuit, the input end of the switching circuit is used as the second input end of the switch control circuit, the output end of the switching circuit is used as the second output end of the switch control circuit, and the control end of the switching circuit is connected with the output end of the power supply protection circuit.
4. The insulator leakage current monitoring system according to claim 3, wherein: the power supply protection circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R4, a voltage regulator tube D1, a triode Q1, a triode Q2 and a PMOS tube Q3;
one end of a resistor R1 is connected to one end of a resistor R7, the other end of a resistor R7 is grounded through a resistor R8, the other end of the resistor R1 is connected to the source electrode of a PMOS tube Q3, the common connection point of the resistor R1 and the resistor R7 serves as the input end of a power supply protection circuit, the common connection point of the resistor R7 and the resistor R8 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected to the base electrode of a triode Q2 through the resistor R9, and the emitter electrode of the triode Q2 is grounded;
the common connection point between the resistor R1 and the source of the PMOS tube Q3 is connected with one end of a resistor R3 through a resistor R2, the other end of the resistor R3 is grounded through a resistor R4, the collector of the triode Q2 is connected with the common connection point between the resistor R2 and the resistor R3, the base of the triode Q1 is connected with the common connection point between the resistor R3 and the resistor R4, the emitter of the triode Q1 is grounded, the collector of the triode Q1 is connected with the gate of the PMOS tube Q3 through the resistor R6, the drain of the PMOS tube Q3 serves as the output end of the power supply protection circuit, and the source of the PMOS tube Q3 is connected with the gate of the PMOS tube Q3 through a resistor R5.
5. The insulator leakage current monitoring system according to claim 3, wherein: the switching circuit comprises a resistor R10, a resistor R11, a resistor R12, a resistor R13, a capacitor C1, a triode Q5 and a PMOS (P-channel metal oxide semiconductor) transistor Q4;
the source electrode of a PMOS tube Q4 is used as the input end of the switching circuit, the drain electrode of a PMOS tube Q4 is used as the output end of the switching circuit, the source electrode of a PMOS tube Q4 is connected with the grid electrode of a PMOS tube Q4 through a resistor R12, the grid electrode of a PMOS tube Q4 is grounded after being connected in parallel with a capacitor C1 through a resistor R13, the collector electrode of a triode Q5 is connected with the source electrode of a PMOS tube Q4, and the emitter electrode of the triode Q5 is connected with the grid electrode of a PMOS tube Q4; one end of the resistor R10 is used as a control end of the switching circuit, the other end of the resistor R10 is grounded through a resistor R11, and a common connection point of the resistor R10 and the resistor R11 is connected with a base electrode of the triode Q5.
6. The insulator leakage current monitoring system according to claim 1, wherein: the first rectifying circuit and the second rectifying circuit are full-bridge rectifying circuits formed by diodes.
7. The insulator leakage current monitoring system according to claim 1, wherein: the storage battery management circuit is a TP5400 battery management chip.
8. The insulator leakage current monitoring system according to claim 1, wherein: the processing circuit is an STM32F101T6U6 chip.
9. The insulator leakage current monitoring system according to claim 1, wherein: the voltage stabilizing circuit comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is used as the first input end of the voltage stabilizing circuit, the input end of the second voltage stabilizing circuit is connected with the output end of the first voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is used as the second input end of the voltage stabilizing circuit, the output end of the second voltage stabilizing circuit supplies power to the processing circuit, the analog-digital conversion circuit and the wireless transmission circuit, and the output end of the first voltage stabilizing circuit supplies power to the power end of the storage battery management circuit.
10. The insulator leakage current monitoring system according to claim 1, wherein: the wireless transmission circuit is a 4G or 5G module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023135489.3U CN214150844U (en) | 2020-12-23 | 2020-12-23 | Insulator leakage current monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023135489.3U CN214150844U (en) | 2020-12-23 | 2020-12-23 | Insulator leakage current monitoring system |
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| CN214150844U true CN214150844U (en) | 2021-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069825A (en) * | 2021-10-28 | 2022-02-18 | 国家电网有限公司 | Multi-output power direct current system |
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- 2020-12-23 CN CN202023135489.3U patent/CN214150844U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069825A (en) * | 2021-10-28 | 2022-02-18 | 国家电网有限公司 | Multi-output power direct current system |
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