CN218481590U - Lightning arrester on-line monitoring circuit - Google Patents
Lightning arrester on-line monitoring circuit Download PDFInfo
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- CN218481590U CN218481590U CN202221855370.XU CN202221855370U CN218481590U CN 218481590 U CN218481590 U CN 218481590U CN 202221855370 U CN202221855370 U CN 202221855370U CN 218481590 U CN218481590 U CN 218481590U
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Abstract
The utility model provides an arrester on-line monitoring circuit, arrester on-line monitoring circuit includes: the device comprises a current sensor, a voltage sensor, a current sampling module, a voltage sampling module, a metering module, a control module and a communication module. The utility model discloses an arrester on-line monitoring circuit detects out electric current and the voltage signal of arrester and PT cabinet department through current sensor and voltage sensor, carries out the comparison through current sampling module, voltage sampling module input metering module and control module, and rethread communication module transmits away, realizes data remote transmission to timely effectual detection arrester internal defect.
Description
Technical Field
The utility model relates to an on-line monitoring technical field particularly, relates to an arrester on-line monitoring circuit.
Background
The lightning arrester is an important primary device in power production in the power industry, and the main function of the lightning arrester in a transformer substation (a voltage boosting and reducing station) and a circuit is to protect other devices from being damaged by lightning overvoltage and system surge overvoltage. From the eighties of the last century, metal oxide (ZnO) arresters (MOAs) gradually replaced SiC arresters, and due to the good volt-ampere characteristics of the metal oxide arresters, the protection level of main equipment in power production has a qualitative leap. With the popularization of MOA, the operation state of the MOA is more and more emphasized by the industry.
At present, the construction of a smart grid is comprehensively developed in a power system, and intelligent control, intelligent management and intelligent analysis are carried out on a whole grid. The intelligent construction of the power grid only starts from beginning, and the intelligent construction of the power grid is not fully popularized and applied for various reasons, and is also a part of the intelligent popularization and application of the power grid for the research on the online monitoring technology of the lightning arresters installed on 10-20 kV distribution lines and transformer stations of a power system. The lightning arresters installed in the distribution lines of 10-20 kV of the current running power system and the transformer station area have the defects of troublesome circuit when wired networking is used for online monitoring, complex processing circuit of synchronous signals, strict phase detection requirement and incapability of timely and effectively transmitting monitoring data.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be: the existing wired networking circuit is troublesome, a processing circuit of a synchronous signal is complex, and monitoring data cannot be timely and effectively transmitted.
In order to solve the above problem, the utility model provides an arrester on-line monitoring circuit, wherein, arrester on-line monitoring circuit includes:
the device comprises a current sensor, a voltage sensor, a current sampling module, a voltage sampling module, a metering module, a control module and a communication module;
the input end of the current sampling module is electrically connected with the output end of the current sensor, and the output end of the current sampling module is electrically connected with the input end of the metering module;
the input end of the voltage sampling module is electrically connected with the output end of the voltage sensor, and the output end of the voltage sampling module is electrically connected with the input end of the metering module;
the input end of the metering module is electrically connected with the output ends of the current sampling module and the voltage sampling module, and the output end of the metering module is electrically connected with the input end of the control module;
the input end of the control module is electrically connected with the output end of the metering module, and the output end of the control module is electrically connected with the input end of the communication module.
Preferably, the current sampling module comprises a specific circuit;
connector CTA1, resistors R9, R10, R11, R12, and capacitors C11, C12;
the port 1 of connector CTA1 connects the rear end of resistance R9 and the front end of resistance R10, the front end of electric capacity C11 and output signal V1P are connected to the front end of resistance R9, the rear end of resistance R11 and the rear end of resistance R12 are connected to the port 2 of connector CTA1, GND is connected to the rear end of resistance R10 and the front end of resistance R11, the rear end of electric capacity C12 and output signal V1N are connected to the front end of resistance R12, GND is connected to the rear end of electric capacity C11 and the front end of electric capacity C12, GND is connected to the port 3 of connector CTA 1.
Preferably, the voltage sampling module comprises a specific circuit;
connector P2, transmitter PTA1, resistors R5, R6, R7 and R8 and capacitors C9 and C10;
Preferably, the metering module and the specific circuit comprise:
the device comprises a metering chip U1, a connector P1, a crystal oscillator Y1, resistors R1, R2, R3 and R4, capacitors C1, C2, C3, C4, C5, C6, C7 and C8;
a port 1 of a metering chip U1 is connected with the rear end of a resistor R2, the front end of the resistor R2 is connected with the front end of the resistor R1, the front ends of capacitors C1, C2, C3 and C4, a port 18 and a 5V power supply of the metering chip U1, the rear ends of the capacitors C1 and C2 are connected with a GND, the rear ends of the capacitors C3 and C4 are connected with a GND, a port 2 of the metering chip U1 is connected with the rear end of the resistor R1, a port 4 of the metering chip U1 is connected with a signal V1P, a port 5 of the metering chip U1 is connected with a signal V1N, a port 8 of the metering chip U1 is connected with a signal V3P, a port 9 of the metering chip U1 is connected with a signal V3N, a port 10 of the metering chip U1 is connected with the front ends of the capacitors C7 and C8, a port 11 of the metering chip U1 is connected with the rear ends and the GND of the capacitors C7 and C8, the port 12 of the metering chip U1 is connected with the front end of the resistor R4, the rear end of the resistor R4 is connected with a 5V power supply, the port 13 of the metering chip U1 is connected with the port 4 of the connector P1, the port 14 of the metering chip U1 is connected with the port 3 of the connector P1, the port 15 of the metering chip U1 is connected with the port 2 of the connector P1, the port 16 of the metering chip U1 is connected with the port 1 of the connector P1, the port 5 of the connector P1 is connected with the 5V power supply, the port 6 of the connector P1 is connected with GND, the port 17 of the metering chip U1 is connected with GND, the port 19 of the metering chip U1 is connected with the rear end of the resistor R3, the rear end of the crystal oscillator Y1 and the rear end of the capacitor C6, the port 20 of the metering chip U1 is connected with the front end of the resistor R3, the front end of the crystal oscillator Y1 and the rear end of the capacitor C5, and the front ends of the capacitors C6 are connected with GND.
Preferably, the model of the metering chip U1 is RN8209.
Preferably, the current sensor and the voltage sensor are installed at the lightning arrester and the PT cabinet.
Preferably, the control module is a single chip microcomputer.
Preferably, the communication module communicates in a wireless or wired manner.
Compared with the prior art, arrester on-line monitoring circuit have following beneficial effect:
(1) The utility model discloses an arrester on-line monitoring circuit detects out electric current and the voltage signal of arrester and PT cabinet department through current sensor and voltage sensor, carries out the comparison through current sampling module, voltage sampling module input metering module and control module, and rethread communication module transmits away, realizes data remote transmission to timely effectual detection arrester internal defect.
(2) The utility model discloses an arrester on-line monitoring circuit, metering module use the ammeter chip can simplify circuit and wired network deployment mode, and the chip model of use is RN8209, and for single-phase measurement chip, the function satisfies the requirement basically.
(3) In the on-line monitoring circuit for the lightning arrester, the networking sensors use alternating current 220V for power supply, and each sensor calculates the phase angle difference between the lightning arrester and the alternating current power supply; and a sensor is also arranged at the PT part, the phase angle difference between the PT voltage and the alternating current power supply is measured through simple circuit modification, and the phase angle difference between the PT voltage and the alternating current power supply is subtracted by utilizing the phase angle difference of the PT voltage and the alternating current power supply through a relative method to obtain the phase angle between the PT and the lightning arrester.
Drawings
Fig. 1 is a schematic structural view of an on-line monitoring circuit of the lightning arrester of the utility model;
fig. 2 is a circuit diagram of the current sampling module of the present invention;
fig. 3 is a circuit diagram of the voltage sampling module of the present invention;
fig. 4 is a circuit diagram of the metering module of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Example one
There is provided an arrester on-line monitoring circuit, as shown in fig. 1, wherein the arrester on-line monitoring circuit includes:
the device comprises a current sensor, a voltage sensor, a current sampling module, a voltage sampling module, a metering module, a control module and a communication module;
the input end of the current sampling module is electrically connected with the output end of the current sensor, and the output end of the current sampling module is electrically connected with the input end of the metering module;
the input end of the voltage sampling module is electrically connected with the output end of the voltage sensor, and the output end of the voltage sampling module is electrically connected with the input end of the metering module;
the input end of the metering module is electrically connected with the output ends of the current sampling module and the voltage sampling module, and the output end of the metering module is electrically connected with the input end of the control module;
the input end of the control module is electrically connected with the output end of the metering module, and the output end of the control module is electrically connected with the input end of the communication module.
Detect out electric current and voltage signal of arrester and PT cabinet department through current sensor and voltage sensor, input metering module and control module through current sampling module, voltage sampling module and carry out the comparison, the transmission of rethread communication module is gone out, realizes data remote transmission to in time effectual detection arrester internal defect.
As shown in fig. 2, the specific circuit of the current sampling module includes;
connector CTA1, resistors R9, R10, R11, R12, and capacitors C11, C12;
the port 1 of connector CTA1 connects the rear end of resistance R9 and the front end of resistance R10, the front end of electric capacity C11 and output signal V1P are connected to the front end of resistance R9, the rear end of resistance R11 and the rear end of resistance R12 are connected to the port 2 of connector CTA1, GND is connected to the rear end of resistance R10 and the front end of resistance R11, the rear end of electric capacity C12 and output signal V1N are connected to the front end of resistance R12, GND is connected to the rear end of electric capacity C11 and the front end of electric capacity C12, GND is connected to the port 3 of connector CTA 1.
The current sampling module is used for converting a current signal input by the current sensor into a standard signal for subsequent processing by the metering module.
As shown in fig. 3, the specific circuit of the voltage sampling module includes;
connector P2, transmitter PTA1, resistors R5, R6, R7 and R8 and capacitors C9 and C10;
The voltage sampling module is used for converting a voltage signal input by the voltage sensor into a standard signal so as to be used for subsequent processing by the metering module.
As shown in fig. 4, the metering module specifically includes:
the device comprises a metering chip U1, a connector P1, a crystal oscillator Y1, resistors R1, R2, R3 and R4, capacitors C1, C2, C3, C4, C5, C6, C7 and C8;
a port 1 of a metering chip U1 is connected with the rear end of a resistor R2, the front end of the resistor R2 is connected with the front end of a resistor R1, the front ends of capacitors C1, C2, C3 and C4, and ports 18 and 5V of the metering chip U1 are powered, the rear ends of the capacitors C1 and C2 are connected with GND, the rear ends of the capacitors C3 and C4 are connected with GND, a port 2 of the metering chip U1 is connected with the rear end of the resistor R1, a port 4 of the metering chip U1 is connected with a signal V1P, a port 5 of the metering chip U1 is connected with a signal V1N, a port 8 of the metering chip U1 is connected with a signal V3P, a port 9 of the metering chip U1 is connected with a signal V3N, a port 10 of the metering chip U1 is connected with the front ends of capacitors C7 and C8, a port 11 of the metering chip U1 is connected with the rear ends of capacitors C7 and C8 and GND, the port 12 of the metering chip U1 is connected with the front end of the resistor R4, the rear end of the resistor R4 is connected with a 5V power supply, the port 13 of the metering chip U1 is connected with the port 4 of the connector P1, the port 14 of the metering chip U1 is connected with the port 3 of the connector P1, the port 15 of the metering chip U1 is connected with the port 2 of the connector P1, the port 16 of the metering chip U1 is connected with the port 1 of the connector P1, the port 5 of the connector P1 is connected with the 5V power supply, the port 6 of the connector P1 is connected with GND, the port 17 of the metering chip U1 is connected with GND, the port 19 of the metering chip U1 is connected with the rear end of the resistor R3, the rear end of the crystal oscillator Y1 and the rear end of the capacitor C6, the port 20 of the metering chip U1 is connected with the front end of the resistor R3, the front end of the crystal oscillator Y1 and the rear end of the capacitor C5, and the front ends of the capacitors C6 are connected with GND.
The model of the metering chip U1 is RN8209.
The metering module uses an ammeter chip to simplify a circuit and a wired networking mode, the model of the used chip is RN8209, the used chip is a single-phase metering chip, and the functions basically meet the requirements.
RN8209 supports all-digital gain, phase and offset correction. Active electric energy pulse is output from the PF pin, and reactive electric energy pulse/user-defined electric energy pulse frequency is output from the QF pin.
RN8209C provides a serial interface UART, fixed baud rate 4800, pin reset multiplexed with UART input pin RX. RN8209D provides a serial interface SPI and a UART, and communication with an external MCU is facilitated.
Wherein, current sensor, voltage sensor install in arrester and PT cabinet department.
Wherein, the control module is a singlechip.
The communication module is used for communicating in a wireless or wired mode.
In the online monitoring circuit of the lightning arrester in the embodiment, the networking sensors are powered by alternating current 220V, and each sensor calculates the phase angle difference between the lightning arrester and the alternating current power supply; and a sensor is also arranged at the PT part, the phase angle difference between the PT voltage and the alternating current power supply is measured through simple circuit modification, and the phase angle difference between the PT voltage and the alternating current power supply is subtracted by utilizing the phase angle difference of the PT voltage and the alternating current power supply through a relative method to obtain the phase angle between the PT and the lightning arrester.
Although the present invention has been described with reference to the above embodiments, the scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and such changes and modifications will fall within the scope of the present invention.
Claims (8)
1. An on-line monitoring circuit for an arrester, the on-line monitoring circuit comprising:
the device comprises a current sensor, a voltage sensor, a current sampling module, a voltage sampling module, a metering module, a control module and a communication module;
the input end of the current sampling module is electrically connected with the output end of the current sensor, and the output end of the current sampling module is electrically connected with the input end of the metering module;
the input end of the voltage sampling module is electrically connected with the output end of the voltage sensor, and the output end of the voltage sampling module is electrically connected with the input end of the metering module;
the input end of the metering module is electrically connected with the output ends of the current sampling module and the voltage sampling module, and the output end of the metering module is electrically connected with the input end of the control module;
the input end of the control module is electrically connected with the output end of the metering module, and the output end of the control module is electrically connected with the input end of the communication module.
2. The on-line monitoring circuit for the lightning arrester according to claim 1, characterized in that the current sampling module, in particular circuit, comprises;
connector CTA1, resistors R9, R10, R11, R12, and capacitors C11, C12;
the port 1 of connector CTA1 connects the rear end of resistance R9 and the front end of resistance R10, the front end of electric capacity C11 and output signal V1P are connected to the front end of resistance R9, the rear end of resistance R11 and the rear end of resistance R12 are connected to the port 2 of connector CTA1, GND is connected to the rear end of resistance R10 and the front end of resistance R11, the rear end of electric capacity C12 and output signal V1N are connected to the front end of resistance R12, GND is connected to the rear end of electric capacity C11 and the front end of electric capacity C12, GND is connected to the port 3 of connector CTA 1.
3. The on-line monitoring circuit for the lightning arrester according to claim 2, characterized in that the voltage sampling module comprises;
connector P2, transmitter PTA1, resistors R5, R6, R7 and R8 and capacitors C9 and C10;
port 1 of connector P2 connects the rear end of resistance R6, port 2 of changer PTA1 is connected to the front end of resistance R6, port 1 of changer PTA1 is connected to port 2 of connector P2, the rear end of resistance R5 and the front end of resistance R7 are connected to port 4 of changer PTA1, the front end of resistance R5 is connected the front end of electric capacity C9 and output signal V3P, port 3 of changer PTA1 is connected the rear end of resistance R7, the rear end of resistance R8 and GND, the rear end of electric capacity C10 and output signal V3N are connected to the front end of resistance R8, the rear end of electric capacity C9 and the front end of electric capacity C10 are connected GND.
4. The on-line arrester monitoring circuit according to claim 3, wherein the metering module specifically comprises:
the device comprises a metering chip U1, a connector P1, a crystal oscillator Y1, resistors R1, R2, R3 and R4, and capacitors C1, C2, C3, C4, C5, C6, C7 and C8;
a port 1 of a metering chip U1 is connected with the rear end of a resistor R2, the front end of the resistor R2 is connected with the front end of the resistor R1, the front ends of capacitors C1, C2, C3 and C4, a port 18 and a 5V power supply of the metering chip U1, the rear ends of the capacitors C1 and C2 are connected with a GND, the rear ends of the capacitors C3 and C4 are connected with a GND, a port 2 of the metering chip U1 is connected with the rear end of the resistor R1, a port 4 of the metering chip U1 is connected with a signal V1P, a port 5 of the metering chip U1 is connected with a signal V1N, a port 8 of the metering chip U1 is connected with a signal V3P, a port 9 of the metering chip U1 is connected with a signal V3N, a port 10 of the metering chip U1 is connected with the front ends of the capacitors C7 and C8, a port 11 of the metering chip U1 is connected with the rear ends and the GND of the capacitors C7 and C8, the port 12 of the metering chip U1 is connected with the front end of the resistor R4, the rear end of the resistor R4 is connected with a 5V power supply, the port 13 of the metering chip U1 is connected with the port 4 of the connector P1, the port 14 of the metering chip U1 is connected with the port 3 of the connector P1, the port 15 of the metering chip U1 is connected with the port 2 of the connector P1, the port 16 of the metering chip U1 is connected with the port 1 of the connector P1, the port 5 of the connector P1 is connected with the 5V power supply, the port 6 of the connector P1 is connected with GND, the port 17 of the metering chip U1 is connected with GND, the port 19 of the metering chip U1 is connected with the rear end of the resistor R3, the rear end of the crystal oscillator Y1 and the rear end of the capacitor C6, the port 20 of the metering chip U1 is connected with the front end of the resistor R3, the front end of the crystal oscillator Y1 and the rear end of the capacitor C5, and the front ends of the capacitors C6 are connected with GND.
5. The on-line arrester monitoring circuit according to claim 4, wherein the model of the metering chip U1 is RN8209.
6. The on-line arrester monitoring circuit of claim 1, wherein the current sensor and the voltage sensor are installed at an arrester and a PT cabinet.
7. The on-line monitoring circuit of the lightning arrester according to claim 1, characterized in that the control module is a single chip microcomputer.
8. The on-line arrester monitoring circuit as claimed in claim 1, wherein the communication module communicates in a wireless or wired manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221855370.XU CN218481590U (en) | 2022-07-05 | 2022-07-05 | Lightning arrester on-line monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221855370.XU CN218481590U (en) | 2022-07-05 | 2022-07-05 | Lightning arrester on-line monitoring circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218481590U true CN218481590U (en) | 2023-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221855370.XU Active CN218481590U (en) | 2022-07-05 | 2022-07-05 | Lightning arrester on-line monitoring circuit |
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| Country | Link |
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| CN (1) | CN218481590U (en) |
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2022
- 2022-07-05 CN CN202221855370.XU patent/CN218481590U/en active Active
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