CN215116701U - Monitor for wireless lightning arrester - Google Patents
Monitor for wireless lightning arrester Download PDFInfo
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- CN215116701U CN215116701U CN202120568426.2U CN202120568426U CN215116701U CN 215116701 U CN215116701 U CN 215116701U CN 202120568426 U CN202120568426 U CN 202120568426U CN 215116701 U CN215116701 U CN 215116701U
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- lower cover
- electrically connected
- inner cavity
- lightning arrester
- monitor
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Abstract
The utility model belongs to the technical field of power grid monitoring equipment, and discloses a monitor for a wireless lightning arrester, which comprises a lower cover and an upper cover, wherein the lower cover is fixedly connected with the upper cover, an inner cavity is formed inside the lower cover and the upper cover, a high-voltage wiring rod is fixedly connected on the lower cover, a grounding wire hole is formed on the lower cover, and a low-voltage wiring is fixedly connected on one side of the inner cavity of the lower cover; the inner cavity is fixedly connected with a PCB (printed circuit board), a PCB assembly is arranged on the PCB, a first aluminum sheet, a zinc oxide sheet, a second aluminum sheet and a silica gel sheet are sequentially installed on one side, close to the cavity, of the lower cover, one end, located in the inner cavity, of the high-voltage wiring rod is electrically connected with the second aluminum sheet and the high-voltage receiving end, and one end, far away from the lower cover, of the low-voltage wiring rod is electrically connected with the low-voltage receiving end. The utility model discloses can be real-time to the monitoring of the leakage current of arrester, real-time reaction arrester's user state, and passive wireless, installation, convenient to use.
Description
Technical Field
The utility model relates to a power grid monitoring facilities technical field especially relates to a monitor for wireless arrester.
Background
The metal zinc oxide arrester (MOA) is an overvoltage protector for safe operation of a power system, the influence of the fluctuation of system voltage on the resistive leakage current value of the MOA is very large, the MOA works for a long time without gaps, a zinc oxide valve plate of the MOA is aged at an accelerated speed, the MOA is subjected to thermal breakdown, a substation bus or a line is short-circuited, and the consequences are very serious. In addition, the sealing is not tight, so that the interior of the lightning arrester is affected with damp, or moisture is immersed in the interior of the lightning arrester during installation, so that the power frequency current is increased, the interior flashover can be caused, and the lightning arrester is exploded. These faults can be reflected by the change in resistive leakage current, and therefore, the change in resistive leakage current of the MOA needs to be monitored to predict whether a fault occurs.
The conventional method is to perform power failure test on the zinc oxide arrester regularly, but the power failure test needs to stop the main equipment, the test period is long, the test equipment is heavy, the economic loss is large, and sometimes the main equipment cannot be stopped due to the limitation of the operation mode, so that the arrester cannot be subjected to the power failure test on time; at present, a lightning stroke counter with a leakage current pointer meter is mounted on a grounding loop of the lightning arrester, the size and the variation trend of the leakage current of the lightning arrester are monitored in a manual meter reading and recording mode, and the timing patrol mode wastes manpower and can not achieve the purpose of real-time monitoring.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a monitor for wireless arrester, can be real-time to the monitoring of the leakage current of arrester, real-time reaction arrester's user state, and passive wireless, installation, convenient to use.
The utility model discloses an above-mentioned technical problem is solved to following technical means:
a monitor for a wireless lightning arrester comprises a lower cover and an upper cover, wherein the lower cover is fixedly connected with the upper cover, an inner cavity is formed inside the lower cover and the upper cover, a high-voltage wiring rod penetrates through the lower cover and is fixedly connected with the lower cover, a grounding wire hole is formed in the lower cover, and a low-voltage wiring is fixedly connected to one side of the lower cover, which is positioned in the inner cavity; a PCB is fixedly connected in the inner cavity, and a PCB assembly is arranged on the PCB; the PCB assembly comprises a high-voltage receiving end, a low-voltage receiving end, a bridge rectifier stack, a normally closed relay and a normally open relay, wherein one end of the bridge rectifier stack is grounded, the high-voltage receiving end and the low-voltage receiving end are respectively and electrically connected with two input ends of the bridge rectifier stack, the output end of the bridge rectifier stack is electrically connected with the input ends of the normally closed relay and the normally open relay, the control end of the normally closed relay and the control end of the normally open relay are electrically connected with the same single chip microcomputer, and the normally closed relay and the normally open relay are both provided with grounding ends and are at zero potential; the output end of the normally closed relay is electrically connected with an energy storage capacitor and an MCU micro-control unit, and the other end of the energy storage capacitor is grounded; the output end of the normally open relay is electrically connected with a sampling resistor and an AD converter, the other end of the sampling resistor is grounded, the output end of the AD converter is electrically connected with an MCU (microprogrammed control unit), and the MCU is electrically connected with a transmitting antenna; first aluminum sheet, zinc oxide piece, second aluminum sheet and silica gel piece are installed in proper order to one side that the lower cover is close to the cavity, the one end that the high pressure binding post is located the inner chamber is all connected with the high pressure receiving terminal with the second aluminum sheet, the one end that the lower cover was kept away from in the low pressure wiring is connected with the low pressure receiving terminal electricity.
Furthermore, an electronic display module is arranged in the inner cavity and electrically connected with the MCU, a through hole is formed in the upper cover, a glass plate is fixedly connected to the through hole, and the electronic display module is matched with the through hole. The electronic display module can show the data of gathering, and the staff can see through the glass board on the through hole and see the data that show on the electronic display module, and the condition of understanding the arrester when the staff of being convenient for patrols and examines.
Furthermore, the transmitting antenna is positioned outside the inner cavity, a threaded column is arranged on the transmitting antenna, a first threaded hole of a lower cover is formed in the lower cover, and the transmitting antenna is in threaded connection with the first threaded hole of the lower cover through the threaded column; and one end of the antenna connecting wire, which is far away from the threaded column, is electrically connected with the MCU. Therefore, the transmitting antenna is arranged outside the inner cavity, the transmitted signal is not blocked, and the transmitted signal is more easily received by an external signal receiving device.
Further, the high-voltage junction pole includes the screw rod, the screw rod runs through the lower cover, the screw rod is located one of the outer cover of inner chamber and is equipped with silica gel pad, connecting plate and fastening nut in proper order, fastening nut threaded connection is on the screw rod, the one end that the screw rod is located the inner chamber is connected with the high-voltage receiving end electricity. The fastening nut is matched with the screw rod to fix the connecting plate, and the connecting plate is fixedly connected with a high-voltage wire terminal on the lightning arrester during installation, so that the installation of the monitor is realized; high-voltage current is conducted to the high-voltage receiving end from the lightning arrester through the connecting plate and the screw rod.
Furthermore, a plurality of second lower cover threaded holes are formed in the lower cover, a plurality of blind holes are formed in the upper cover, nut inserts are fixed in the blind holes, and first screws are connected between the second lower cover threaded holes and the nut inserts in a threaded mode. Therefore, the detachable connection of the upper cover and the lower cover is realized, and the electronic element in the inner cavity between the upper cover and the lower cover is convenient to maintain or replace.
Furthermore, one side of the lower cover, which is positioned in the inner cavity, is fixedly connected with a plurality of stand columns, and stand column threaded holes are formed in the stand columns; first aluminum sheet, zinc oxide piece, second aluminum sheet, silica gel piece and screw rod are located the one end overcoat of cavity and are equipped with the plastics center, one side that the lower cover was kept away from to the plastics center is provided with the briquetting, the edge of briquetting is provided with a plurality of briquetting screw holes that correspond with the stand screw hole, threaded connection has the second screw between briquetting screw hole and the stand screw hole, PCB board fixed connection is on the briquetting. So, can fix each components and parts of inner chamber to together fixed between each components and parts, the compactness of structure is more, and the installation is more stable, avoids components and parts to use or installation in the transportation not hard up drop.
Further, a current doubling rectifying circuit is electrically connected between the energy storage capacitor and the normally closed relay. Under the general condition, the leaked microampere current is not enough to support the normal operation of the sensor, a current doubling rectifying circuit is adopted to amplify the current, and then the power is stored by an energy storage capacitor to supply power to the MCU.
Further, the normally closed relay is a normally closed optocoupler relay, and the normally open relay is a normally open optocoupler relay. The current leakage needs to be measured while electricity is taken, the current flow direction is necessarily controlled, the size of a general relay is large, the action current is large, the current flow direction is controlled by adopting an optocoupler relay, the starting current is as low as 1MA, and the size is small.
Furthermore, the MCU micro-control unit is also electrically connected with a transformer coil, and the other end of the transformer coil is grounded. The transformer coil can sense the heavy current when thunderbolt, converts the heavy current into the undercurrent signal through the mutual-inductor, then undercurrent signal transmission gives MCU micro control unit, and MCU micro control unit records the number of times of thunderbolt.
The utility model has the advantages that:
when the monitor for the wireless lightning arrester is installed, the connecting plate of the monitor is fixedly and electrically connected with the lightning arrester base, and the grounding wire hole is fixedly and electrically connected with the lightning arrester base and the ground; after lightning strikes on the lightning arrester, lightning current firstly passes through the lightning arrester to be subjected to voltage filtration, leakage current then flows into a second aluminum sheet and a high-voltage receiving end of the PCB assembly through the lightning arrester base and the screw rod, current of the second aluminum sheet also passes through the zinc oxide sheet and then reaches the first aluminum sheet, and because the voltage of the first aluminum sheet is smaller than that of the second aluminum sheet after passing through the zinc oxide sheet, low voltage is formed at the second aluminum sheet, the second aluminum sheet is electrically connected with the low-voltage receiving end of the PCB assembly, and therefore high-low voltage difference is formed, and power is supplied to the PCB assembly and the LCD display screen; the PCB subassembly can be real-time to monitoring leakage current, temperature, the thunderbolt number of times of arrester, real-time reaction arrester's user state, the utility model discloses a wireless transmission technique accomplishes passive wireless, installation, convenient to use.
Drawings
Fig. 1 is a schematic view of a wireless lightning arrester monitor according to the present invention;
FIG. 2 is a partially disassembled schematic view of FIG. 1;
FIG. 3 is an exploded view of FIG. 1;
FIG. 4 is a schematic view of an upper cover and a lower cover;
FIG. 5 is a circuit schematic of a PCB assembly;
fig. 6 is the installation schematic diagram of the monitor for the wireless lightning arrester on the lightning arrester of the utility model.
The device comprises a lower cover 1, an upper cover 2, a second threaded hole 3 of the lower cover, a blind hole 4, a nut insert 5, a screw rod 6, a silica gel pad 7, a connecting plate 8, a fastening nut 9, a ground wire hole 10, a low-voltage wiring 11, a PCB 12, a PCB assembly 13, a high-voltage receiving end 14, a low-voltage receiving end 15, a bridge rectifier stack 16, a normally closed optical coupler relay 17, a normally open optical coupler relay 18, a single chip microcomputer 19, an energy storage capacitor 20, an MCU micro control unit 21, a sampling resistor 22, an AD converter 23, a transmitting antenna 24, a current-doubling rectifying circuit 25, a transformer coil 26, a first aluminum sheet 27, a zinc oxide sheet 28, a second aluminum sheet 29, a silica gel sheet 30, a high-voltage wiring 31, a stand column 32, a plastic center frame 33, a pressing block 34, an LCD display screen 35, a through hole 36, a glass plate 37, an antenna connecting wire 38, a lightning arrester base 39 and an arrester base 40.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings:
as shown in fig. 1 to 6:
the utility model provides a monitor for wireless arrester, includes lower cover 1 and upper cover 2, and lower cover 1 and the inside inner chamber that forms of upper cover 2 have seted up four lower cover second screw holes 3 on the lower cover 1, and upper cover 2 is last to set up four blind holes 4 that match with lower cover second screw hole 3 positions, and interference fit is fixed with nut mold insert 5 in the blind hole 4, and threaded connection has first screw between lower cover second screw hole 3 and the nut mold insert 5. A screw 6 is fixedly connected to the lower cover 1 in a penetrating mode, a silica gel pad 7, a connecting plate 8 and a fastening nut 9 are sequentially sleeved on one end, located outside the inner cavity, of the screw 6, the fastening nut 9 is connected to the screw 6 in a threaded mode, a grounding wire hole 10 is formed in the lower cover 1, and a low-voltage wiring 11 is fixedly connected to one side, located in the inner cavity, of the lower cover 1; a PCB (printed Circuit Board) 12 is fixedly connected in the inner cavity, and a PCB assembly 13 is arranged on the PCB 12;
the PCB assembly 13 comprises a high-voltage receiving end 14, a low-voltage receiving end 15, a bridge rectifier stack 16, a normally closed optocoupler relay 17 and a normally open optocoupler relay 18, one end of the bridge rectifier stack 16 is grounded, the high-voltage receiving end 14 and the low-voltage receiving end 15 are respectively electrically connected with two input ends of the bridge rectifier stack 16, the output end of the bridge rectifier stack 16 is electrically connected with the input end of the normally closed optocoupler relay 17 and the input end of the normally open optocoupler relay 18, the control end of the normally closed optocoupler relay 17 and the control end of the normally open optocoupler relay 18 are electrically connected with a single chip microcomputer 19, and the normally closed optocoupler relay 17 and the normally open optocoupler relay 18 are both provided with grounding ends and are at zero potential; the output end of the normally closed optocoupler relay 17 is electrically connected with an energy storage capacitor 20 and an MCU micro-control unit 21, the other end of the energy storage capacitor 20 is grounded, and a current doubling rectifying circuit 25 is electrically connected between the energy storage capacitor 20 and the normally closed optocoupler relay 17; the output end of the normally open optocoupler relay 18 is electrically connected with a sampling resistor 22 and an AD converter 23, the other end of the sampling resistor 22 is grounded, the output end of the AD converter 23 is electrically connected with an MCU (microprogrammed control Unit) 21, the MCU 21 is electrically connected with a transmitting antenna 24 and a mutual inductor coil 26, and the other end of the mutual inductor coil 26 is grounded; the transmitting antenna 24 is positioned outside the inner cavity, a threaded column is arranged on the transmitting antenna 24, a first threaded hole of the lower cover is formed in the lower cover 1, and the transmitting antenna 24 is in threaded connection with the first threaded hole of the lower cover through the threaded column; and one end of the threaded column, which is positioned in the inner cavity, is fixedly connected with an antenna connecting wire 38, and one end of the antenna connecting wire 38, which is far away from the threaded column, is electrically connected with the MCU 21.
One side of the lower cover 1 close to the cavity is fixedly provided with a first aluminum sheet 27, a zinc oxide sheet 28, a second aluminum sheet 29 and a silica gel sheet 30 from bottom to top in sequence, one end of the screw rod 6 located in the cavity is electrically connected with the second aluminum sheet 29 and the high-voltage wiring 31 end, the screw rod 6 is electrically connected with the high-voltage wiring 31 end through the high-voltage wiring 31, and one end of the low-voltage wiring 11 far away from the lower cover 1 is electrically connected with the low-voltage receiving end 15. A plurality of upright posts 32 are integrally formed on one side of the inner cavity of the lower cover 1, and upright post threaded holes are formed in the upright posts 32; first aluminum sheet 27, zinc oxide piece 28, second aluminum sheet 29, silica gel piece 30 and the one end overcoat of screw rod 6 in the cavity are equipped with plastics center 33, and the upside of plastics center 33 is provided with briquetting 34, and the edge of briquetting 34 is provided with a plurality of briquetting screw holes that correspond with the stand screw hole, and threaded connection has the second screw between briquetting screw hole and the stand screw hole, and PCB board 12 passes through screwed connection on briquetting 34. An LCD display screen 35 is fixed on the pressing block 34, the LCD display screen 35 is electrically connected with the MCU micro-control unit 21, a through hole 36 is formed in the upper cover 2, a glass PCB 12 is bonded on the through hole 36, the LCD display screen 35 is matched with the through hole 36, and display content of the LCD display screen 35 can be seen through glass on the through hole 36.
The utility model discloses a use method as follows:
when mounting, the connection plate 8 of the monitor is first fixedly and electrically connected to the arrester base 39, and the ground wire hole 10 is fixedly and electrically connected to the arrester base 40 and the ground.
After lightning strikes to the lightning arrester, lightning current firstly passes through the lightning arrester to be subjected to voltage filtration, leakage current then flows into the second aluminum sheet 29 and the high-voltage receiving end 14 of the PCB assembly 13 through the lightning arrester base 39 and the screw 6, current of the second aluminum sheet 29 also reaches the first aluminum sheet 27 through the zinc oxide sheet 28, and because the current passes through the zinc oxide sheet 28, the voltage of the first aluminum sheet 27 is smaller than that of the second aluminum sheet 29, so that low voltage is formed at the second aluminum sheet 29, the second aluminum sheet 29 is electrically connected with the low-voltage receiving end 15 of the PCB assembly 13, and high-low voltage difference is formed and power is supplied to the PCB assembly 13 and the LCD display screen 35.
When the lightning arrester just runs, the single chip microcomputer 19 and the MCU micro control unit 21 in the PCB assembly 13 are not powered yet, leakage current flows to the current doubling rectifying circuit 25 through the normally closed optocoupler relay 17, the current doubling rectifying circuit 25 starts to work, voltage is output to the energy storage capacitor 20, and when the energy storage capacitor 20 generally reaches 5V, the single chip microcomputer 19 and the MCU micro control unit 21 normally work. After the singlechip 19 normally works, the normally closed optocoupler relay 17 is controlled to be opened, and the normally open optocoupler relay 18 is controlled to be closed.
At this time, the leakage current flows to the sampling resistor 22, and the MCU micro-control unit 21 divides the sampling resistor 22 by the FFT algorithm according to the collected voltage value, i.e. the current value, which is collected by the MCU micro-control unit 21. The number of lightning strikes is collected through the large current induced by the transformer coil 26, the secondary end of the transformer coil 26 outputs a high level, and one lightning strike outputs one high level. The singlechip 19 collects the lightning stroke times at any time through an interruption mode; in the process, the temperature sensor detects the temperature, which is also controlled by the MCU micro-control unit 21. After the current, the temperature and the lightning stroke frequency are collected by the MCU 21, the data are wirelessly transmitted to the background through the transmitting antenna 24 at intervals. The transmit antenna 24 is transmitted to the background.
In the acquisition process of the current value, the lightning stroke frequency and the temperature, the power supply for the work of the MCU micro-control unit 21 is provided by the energy storage capacitor 20. When the current collection process is finished, the singlechip 19 controls the normally open optocoupler relay 18 to be opened, the normally closed optocoupler relay 17 to be closed, and the lightning arrester enters a power supply energy storage mode again.
The staff can see the data that show on the LCD display screen 35 through the glass board 37 on the through-hole 36, knows the condition of arrester when being convenient for the staff patrols and examines.
Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (9)
1. A monitor for a wireless lightning arrester is characterized in that: the low-voltage grounding switch comprises a lower cover and an upper cover, wherein the lower cover and the upper cover are fixedly connected, an inner cavity is formed inside the lower cover and the upper cover, a high-voltage wiring rod penetrates through the lower cover and is fixedly connected with the lower cover, a grounding wire hole is formed in the lower cover, and a low-voltage wiring is fixedly connected to one side of the lower cover, which is positioned in the inner cavity; a PCB is fixedly connected in the inner cavity, and a PCB assembly is arranged on the PCB; the PCB assembly comprises a high-voltage receiving end, a low-voltage receiving end, a bridge rectifier stack, a normally closed relay and a normally open relay, wherein one end of the bridge rectifier stack is grounded, the high-voltage receiving end and the low-voltage receiving end are respectively and electrically connected with two input ends of the bridge rectifier stack, the output end of the bridge rectifier stack is electrically connected with the input ends of the normally closed relay and the normally open relay, the control end of the normally closed relay and the control end of the normally open relay are electrically connected with the same single chip microcomputer, and the normally closed relay and the normally open relay are both provided with grounding ends and are at zero potential; the output end of the normally closed relay is electrically connected with an energy storage capacitor and an MCU micro-control unit, and the other end of the energy storage capacitor is grounded; the output end of the normally open relay is electrically connected with a sampling resistor and an AD converter, the other end of the sampling resistor is grounded, the output end of the AD converter is electrically connected with an MCU (microprogrammed control unit), and the MCU is electrically connected with a transmitting antenna; first aluminum sheet, zinc oxide piece, second aluminum sheet and silica gel piece are installed in proper order to one side that the lower cover is close to the cavity, the one end that the high pressure binding post is located the inner chamber is all connected with the high pressure receiving terminal with the second aluminum sheet, the one end that the lower cover was kept away from in the low pressure wiring is connected with the low pressure receiving terminal electricity.
2. A monitor for a wireless lightning arrester according to claim 1, characterized in that: the inner cavity is internally provided with an electronic display module, the electronic display module is electrically connected with the MCU, the upper cover is provided with a through hole, the through hole is fixedly connected with a glass plate, and the electronic display module is matched with the through hole.
3. A monitor for a wireless lightning arrester according to claim 2, characterized in that: the transmitting antenna is positioned outside the inner cavity, a threaded column is arranged on the transmitting antenna, a first threaded hole of a lower cover is formed in the lower cover, and the transmitting antenna is connected in the first threaded hole of the lower cover through the threaded column in a threaded mode; and one end of the antenna connecting wire, which is far away from the threaded column, is electrically connected with the MCU.
4. A monitor for a wireless lightning arrester according to claim 3, characterized in that: the high-voltage junction pole comprises a screw rod, the screw rod penetrates through the lower cover, a silica gel pad, a connecting plate and a fastening nut are sequentially sleeved on one end, located outside the inner cavity, of the screw rod, the fastening nut is in threaded connection with the screw rod, and one end, located in the inner cavity, of the screw rod is electrically connected with the high-voltage receiving end.
5. A monitor for a wireless lightning arrester according to claim 4, characterized in that: the lower cover is provided with a plurality of second lower cover threaded holes, the upper cover is provided with a plurality of blind holes, nut inserts are fixed in the blind holes, and first screws are in threaded connection between the second lower cover threaded holes and the nut inserts.
6. A monitor for a wireless lightning arrester according to claim 5, characterized in that: one side of the lower cover, which is positioned in the inner cavity, is fixedly connected with a plurality of stand columns, and stand column threaded holes are formed in the stand columns; first aluminum sheet, zinc oxide piece, second aluminum sheet, silica gel piece and screw rod are located the one end overcoat of cavity and are equipped with the plastics center, one side that the lower cover was kept away from to the plastics center is provided with the briquetting, the edge of briquetting is provided with a plurality of briquetting screw holes that correspond with the stand screw hole, threaded connection has the second screw between briquetting screw hole and the stand screw hole, PCB board fixed connection is on the briquetting.
7. A monitor for a wireless lightning arrester according to claim 6, characterized in that: and a current doubling rectifying circuit is electrically connected between the energy storage capacitor and the normally closed relay.
8. A monitor for a wireless lightning arrester according to claim 7, characterized in that: the normally closed relay is a normally closed optocoupler relay, and the normally open relay is a normally open optocoupler relay.
9. A monitor for a wireless lightning arrester according to claim 8, characterized in that: the MCU micro-control unit is also electrically connected with a transformer coil, and the other end of the transformer coil is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120568426.2U CN215116701U (en) | 2021-03-19 | 2021-03-19 | Monitor for wireless lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120568426.2U CN215116701U (en) | 2021-03-19 | 2021-03-19 | Monitor for wireless lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215116701U true CN215116701U (en) | 2021-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120568426.2U Active CN215116701U (en) | 2021-03-19 | 2021-03-19 | Monitor for wireless lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215116701U (en) |
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2021
- 2021-03-19 CN CN202120568426.2U patent/CN215116701U/en active Active
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