CN110824400B - Remote monitoring system and method for lightning arrester discharge counter - Google Patents
Remote monitoring system and method for lightning arrester discharge counter Download PDFInfo
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- CN110824400B CN110824400B CN201910887215.2A CN201910887215A CN110824400B CN 110824400 B CN110824400 B CN 110824400B CN 201910887215 A CN201910887215 A CN 201910887215A CN 110824400 B CN110824400 B CN 110824400B
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- lightning arrester
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- discharge counter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
Abstract
The invention relates to the technical field of power equipment, in particular to a remote monitoring system and a remote monitoring method for an arrester discharge counter, and the remote monitoring system comprises three detection terminals, a wireless communication module, a data acquisition box, a GSM communication module, a positioning module, a power supply module and a server, wherein each detection terminal comprises a shell, an MCU, a memory and connecting wires, one end of each connecting wire is respectively connected with the arrester discharge counter of a three-phase line, each data acquisition box comprises a box body, a controller and a second memory, the controllers and the second memories are both installed in the box bodies, the MCU is in communication connection with the controllers through the wireless communication module, and the controllers are in communication connection with the server through the GSM communication module. The substantial effects of the invention are as follows: the monitoring terminal reads the reading of each corresponding arrester discharge counter, and the data acquisition box collects the readings of the arrester discharge counters corresponding to the three phase lines and reports the readings to the server regularly, so that the monitoring of the arresters is facilitated.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a remote monitoring system and method for a lightning arrester discharge counter.
Background
An arrester is a device used to protect electrical equipment from high transient overvoltage, usually connected between a network phase line and ground. The lightning arrester utilizes the nonlinear volt-ampere characteristic of the nonlinear resistor, so that the current flowing through the lightning arrester is extremely small at normal working voltage, usually in the microampere or milliamp level; when overvoltage acts, namely lightning strike or overvoltage surge impact, the resistance value of the nonlinear resistor is sharply reduced, and the energy of the overvoltage is discharged, so that the effect of protecting the circuit and equipment in the circuit is achieved. The circuit breaker action that the use widely of arrester arouses for reducing mountain area circuit thunderbolt overvoltage has played huge effect, nevertheless because mountain area circuit ground is far away to the arrester monitor, leakage appearance and counter all install the shaft tower eminence promptly, and the arrester parameter is checked meter and is overhauld the work degree of difficulty greatly. And the leakage detector and the counter can also age and break down when in use, and the lightning arrester monitor cannot work normally when the leakage detector and the counter are close to the annual inspection. Therefore, it is necessary to develop a system capable of online monitoring of the lightning arrester.
For example, chinese patent CN102636768B, published 2016, 4, month 27, a method for checking an online monitor of a lightning arrester, comprising: when detecting the milliammeter of the lightning arrester on-line monitor: connecting a current measuring device with an online lightning arrester monitor in parallel, and reading current values of a milliammeter and a current measuring unit; judging whether a milliammeter of an online lightning arrester monitor fails or not; when detecting an action counter of the lightning arrester on-line monitor, connecting a high-voltage generator and the lightning arrester on-line monitor in parallel, and inputting high-voltage current; and judging whether the action counter fails. The method still needs manual field operation, and cannot solve the problems of high overhauling difficulty and high workload of the existing arrester monitor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem that the monitoring difficulty of the existing lightning arrester discharge counter is large and the efficiency is low is solved. The remote monitoring system and the method for the lightning arrester discharge counter are convenient and accurate to monitor in remote monitoring.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides an arrester counter remote monitering system that discharges, includes three testing terminal, wireless communication module, data acquisition box, GSM communication module, orientation module, power module and server, testing terminal includes casing, MCU and connecting wire, and is three connecting wire one end is connected with the arrester counter that discharges of three-phase line respectively, and the connecting wire other end is connected with MCU, and MCU installs in the casing, and data acquisition box includes box, controller and memory, and controller and memory are all installed in the box, and memory, GSM communication module and orientation module all are connected with the controller, and MCU passes through wireless communication module and establishes communication connection with the controller, and power module is the power supply of other parts, and the controller passes through GSM communication module and server communication connection. The detection terminal is connected with the lightning arrester discharge counter through a connecting wire, detects the count of the lightning arrester discharge counter and sends the count to the data acquisition box, the data acquisition box stores the count and reports the count to the server according to a set period, and the discharge times of the lightning arrester in the monitoring area are conveniently monitored through the server.
Preferably, the power supply module comprises a storage battery BT1, a photovoltaic panel and a charging circuit, the detection terminal and the data acquisition box are respectively connected with the photovoltaic panel, the detection terminal and the data acquisition box are respectively provided with the storage battery and the charging circuit, and the photovoltaic panel is connected with the storage battery through the charging circuit. Can be for detection terminal and data acquisition box power supply through the photovoltaic board, prolong detection terminal and data acquisition box's operating time length, reduce the maintenance number of times.
Preferably, the charging circuit comprises a photovoltaic panel interface J1, a three-terminal regulator U1, a diode D1, a resistor R1, a transistor VT1 and a chip U1, wherein the photovoltaic panel interface J1 is connected with the photovoltaic panel, the positive electrode of the photovoltaic panel interface J1 is connected with the input end of the three-terminal regulator U1, the output end of the three-terminal regulator U1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the collector of the transistor VT1 and one end of the resistor R1, the emitter of the transistor VT1 is connected with one end of the resistor R1 and the positive electrode of the storage battery BT1, the negative electrode of the storage battery BT1 is grounded, the other end of the resistor R1 is connected with one end of the resistor R1 and the collector of the transistor VT1, the other end of the resistor R1 is grounded, one end of the resistor R1 is connected with the positive electrode of the photovoltaic panel interface, the other end of the resistor R6 is connected with one end of the resistor R5 and the chip U2, and the other end of the resistor R5 is grounded.
The working principle of the preferred scheme is as follows: when the photovoltaic panel outputs power, the triode VT1 is conducted, the photovoltaic panel supplies power to other modules through the three-terminal voltage regulator tube U1 and charges the storage battery BT1, when the photovoltaic panel does not output power, the triode VT1 is cut off, the triode VT2 is conducted, and the storage battery BT1 supplies power to other modules through the triode VT2 and the three-terminal voltage regulator tube U1.
Preferably, the charging circuit further comprises a detection filter module, the detection filter module comprises an inductor L1, a capacitor C1 and a diode D2, one end of the inductor L1 is connected with the cathode of the diode D1, the other end of the inductor L1 is connected with the anode of the diode D2, one end of the capacitor C1 is connected with the cathode of the diode D2 and the chip U2, and the other end of the capacitor C1 is grounded. The chip U2 detects the output voltage of diode D2 negative pole through the DDV mouth, and when triode VT1 and triode VT2 all cut off, when this voltage is steady, control triode VT1 switches on, and the photovoltaic board charges for battery BT1 this moment, and when voltage reduction appears, control triode VT1 cuts off, if the voltage does not resume, then control triode VT2 switches on.
Preferably, the lightning arrester discharge counter comprises a lightning arrester, a nonlinear resistor R1, a nonlinear resistor R2, a high-voltage capacitor C, a pointer action coil L, an isolation module, a pointer, a dial plate and a watch case, one end of the lightning arrester is connected with a phase line, the other end of the lightning arrester is connected with one ends of the nonlinear resistor R1 and the nonlinear resistor R2, the other end of the nonlinear resistor R1 is grounded, the other end of the nonlinear resistor R2 is connected with the high-voltage capacitor C and one end of the pointer action coil L, a connection point of the nonlinear resistor R2 and the high-voltage capacitor C is connected with the MCU through the isolation module, the other ends of the high-voltage capacitor C and the pointer action coil L are both grounded, the calibration module is connected with the nonlinear resistor R1 in parallel, the calibration module is connected with the MCU through a connecting wire, the dial is arranged in the watch case, the pointer is arranged on the dial, and the pointer is connected with the pointer action coil L. The lightning arrester and the nonlinear resistor R1 have larger resistance values under normal voltage, which is equivalent to insulation, when lightning strike occurs, the lightning arrester, the nonlinear resistor R1 and the nonlinear resistor R2 are all conducted, overvoltage current is led into the ground, partial current flows into the high-voltage capacitor C, after the lightning strike occurs, the lightning arrester, the nonlinear resistor R1 and the nonlinear resistor R2 all recover a high-resistance state, which is equivalent to insulation, electric energy stored in the high-voltage capacitor C is discharged through a pointer action coil L to drive a pointer to act, meanwhile, a P2 point can monitor high voltage, the high voltage is connected with an MCU through a voltage division unit, the action of the counter can be synchronously monitored by monitoring the voltage through the MCU, and synchronous counting with the counter can be realized as long as initial values are aligned. The verification module is capable of verifying the count by coupling with a non-linear resistor R1.
Preferably, the calibration module comprises a spring, a slip ring, a slip needle and a displacement sensor, the slip ring is connected to the joint of the nonlinear resistor R1 and the nonlinear resistor R2, the slip ring is fixed in the shell, the slip needle is sleeved in the slip ring, the outer wall of the slip needle is abutted to the inner wall of the slip ring, one end of the spring is connected with the slip needle, the other end of the spring is fixedly connected with the shell and grounded, the displacement sensor is installed in the shell, the displacement sensor detects the displacement of the slip needle, and the displacement sensor is connected with the MCU. When current passes through the spring, the spring shrinks a little, the small shrinkage can be detected through the displacement sensor, when lightning stroke does not occur, milliampere-level leakage current exists in the lightning arrester, the nonlinear resistor R1 is in a high-resistance state, the leakage current almost completely passes through the spring, at the moment, the shrinkage of the spring is small, and the displacement of the sliding needle is small; when the arrester breaks down the electric leakage current increase, the spring shrinkage increases, and the slide bar displacement volume increase just can assist the judgement arrester through being located the sensor and whether appear thunder and lightning trouble. When lightning strike occurs, the spring is equivalent to an inductor, the current of the inductor cannot be transient, the increase of the current flowing through the spring in the lightning strike process is limited, but the spring still has larger shrinkage, the displacement change can be detected by the sensor, namely, under normal lightning strike, the voltage rise can occur at the far end of the pointer action coil L, the displacement of the sliding needle can be detected by the sensor to be obviously increased, if only one of the displacement and the displacement is detected, the lightning arrester or the lightning arrester discharge counter has faults, and the online monitoring of the lightning arrester and the lightning arrester discharge counter is realized.
Preferably, the magnetic ring type magnetic needle comprises a magnet, a magnetic ring fixing piece and a magnetic ring adjusting nut, wherein the magnet is annular and is fixedly connected with the sliding needle, the magnetic ring is arranged on the magnetic ring fixing piece and is positioned below the magnet, the magnetic ring and the magnet attract each other, the magnetic ring fixing piece is clamped with the shell, the magnetic ring adjusting nut is rotatably clamped with the shell, and the magnetic ring adjusting nut is fixedly connected with the magnetic ring through a thread pair. When the detection terminal is installed, the sliding needle is arranged right above the spring, the spring is compressed by the gravity of the sliding needle, the magnetic ring attracts the magnet, the compression amount of the spring is reduced, the spring has a pre-compression amount by the gravity of the sliding needle and the attraction of the magnetic ring magnet, the sliding needle is at an initial position at the moment, when the detection terminal is installed at a certain inclination, the gravity of the sliding needle does not completely act on the spring, the magnetic ring is adjusted at the moment, the magnetic ring is far away from the magnet, the attraction of the magnetic ring magnet is reduced, the sliding needle returns to the initial position again, when current passes through the spring, the spring contracts, the magnet is far away from the magnetic ring, the attraction of the magnetic ring of the magnet is weakened, the contraction amount of the spring is increased, namely the magnetic ring of the magnet can amplify the spring contraction amount caused by the current, and the capacity of detecting weak current is improved.
Preferably, the displacement sensor is a non-contact displacement sensor.
Preferably, the non-contact displacement sensor comprises a laser emitter, a reflection wafer and a light receiver, the laser emitter and the light receiver are both arranged in the shell, the reflection wafer is arranged at the end part of the sliding needle, the diameter of the reflection wafer is equal to the diameter of a light spot of light emitted by the laser generator, and the light receiver is connected with the MCU. When the sliding needle is located at the initial position, the light spot of the emergent light of the laser emitter irradiates the reflection wafer and is totally reflected to the light receiver, when the sliding needle is displaced, the light spot of the emergent light of the laser emitter is partially moved out of the reflection wafer, so that the light intensity received by the light receiver is reduced, when the light intensity received by the light receiver is reduced to exceed a set threshold value, the current passing through the spring is considered to exceed the set threshold value, and electric leakage early warning is sent out or the lightning stroke auxiliary judgment is sent out.
A remote monitoring method of an arrester discharge counter uses the remote monitoring system of the arrester discharge counter, and comprises the following steps: A) installing a detection terminal, enabling a sliding needle to be along the plumb direction, adjusting a magnetic ring adjusting nut, enabling the output value of a light receiver to be maximum, and locking the magnetic ring adjusting nut; B) the MCU collects the output value of the light receiver and the voltage of the far end of the pointer action coil L in a preset period; C) when the voltage of the far-end ground of the pointer action coil L is higher than a set threshold, recording the current time T1 until the voltage of the far-end ground of the pointer action coil L restores to the set voltage range, recording the voltage restoring time T2 of the far-end ground of the pointer action coil L, obtaining action time intervals (T1 and T2), and if the output value of the optical receiver is not lower than the preset threshold in the action time intervals (T1 and T2), sending out false alarm, otherwise, synchronously adding one to the counting monitoring value of the lightning arrester; D) and when the output value of the light receiver is lower than a preset threshold value, recording the current time T3, and if the time T3 is not in the time interval (T1, T2), sending an arrester leakage alarm.
The substantial effects of the invention are as follows: the detection terminal is connected with the lightning arrester discharge counters through a connecting wire, the reading of each corresponding lightning arrester discharge counter is read, the reading of the lightning arrester discharge counter corresponding to the three phase lines is collected through the data collection box and then reported to the server periodically, the discharge times of the lightning arrester in the power grid area can be checked in real time through the server, and the monitoring of the lightning arrester is facilitated; the photovoltaic panel can supply power to the detection terminal and the data acquisition box, so that the working time of the detection terminal and the data acquisition box is prolonged, and the maintenance times are reduced; whether the lightning arrester discharge counter breaks down or not and whether the leakage current of the lightning arrester exceeds the limit or not are judged in an auxiliary mode through the checking module, and the reliability of the lightning arrester is improved.
Drawings
Fig. 1 is a schematic structural diagram of a remote monitoring system according to an embodiment.
Fig. 2 is a schematic view of monitoring a lightning arrester according to an embodiment.
FIG. 3 is a schematic diagram of a detection termination circuit according to an embodiment.
Fig. 4 is a schematic structural diagram of a verification module according to an embodiment.
FIG. 5 is an original diagram of a charging circuit according to an embodiment.
Wherein: 1. the lightning arrester comprises a lightning arrester discharge counter, 2, a connecting wire, 3, a wireless communication antenna, 4, a detection terminal, 5, a photovoltaic panel, 6, a GSM communication antenna, 7, a positioning module, 8, a data acquisition box, 9, a verification module, 10, a lightning arrester, 11, an isolation module, 12, an MCU, 13, a wireless communication unit, 14, a laser transmitter, 15, a reflection wafer, 16, a magnet, 17, a magnetic ring, 18, a magnetic ring fixing piece, 19, a magnetic ring adjusting nut, 20, a sliding ring, 21, a sliding needle, 22, a spring, 23 and an optical receiver.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
a remote monitoring system of a lightning arrester discharge counter 1 is disclosed, as shown in figure 1, the embodiment comprises three detection terminals 4, a wireless communication module, a data acquisition box 8, a GSM communication module, a positioning module 7, a power supply module and a server, as shown in figure 3, the detection terminal 4 comprises a shell, an MCU 12 and a connecting wire 2, the wireless communication module comprises a wireless communication unit 13 and a wireless communication antenna 3, the wireless communication antenna 3 is arranged outside the shell, one end of the three connecting wire 2 is respectively connected with the lightning arrester discharge counter 1 of a three-phase wire, the other end of the connecting wire 2 is connected with the MCU 12, the MCU 12 is arranged inside the shell, the data acquisition box 8 comprises a box body, a controller and a memory, the controller and the memory are both arranged inside the box body, the wireless communication antenna 3 is arranged outside the box body, the GSM communication antenna 6 is arranged outside the box body, the memory, the GSM communication module and the positioning module 7 are both connected with the controller, the MCU 12 is in communication connection with the controller through the wireless communication module, the power supply module supplies power to other parts, and the controller is in communication connection with the server through the GSM communication module.
As shown in fig. 2, the arrester discharge counter 1 includes an arrester 10, a nonlinear resistor R1, a nonlinear resistor R2, a high-voltage capacitor C, a pointer action coil L, a pointer, a dial and a watch case, one end of the arrester 10 is connected to a phase line, the other end of the arrester is connected to one ends of a nonlinear resistor R1 and a nonlinear resistor R2, the other end of the nonlinear resistor R1 is grounded, the other end of the nonlinear resistor R2 is connected to one ends of the high-voltage capacitor C and the pointer action coil L, a connection point of the nonlinear resistor R2 and the high-voltage capacitor C is connected to the MCU 12 through an isolation module 11, the other ends of the high-voltage capacitor C and the pointer action coil L are grounded, a verification module 9 is connected in parallel to the nonlinear resistor R1, and the verification module 9 is connected to the MCU 12 through a connection line 2. The lightning arrester 10 and the nonlinear resistor R1 have large resistance values under normal voltage, which is equivalent to insulation, when a lightning strike occurs, the lightning arrester 10, the nonlinear resistor R1 and the nonlinear resistor R2 are all turned on, overvoltage current is led into the ground, part of the current flows into the high-voltage capacitor C, after the lightning strike occurs, the lightning arrester 10, the nonlinear resistor R1 and the nonlinear resistor R2 all recover a high-resistance state, which is equivalent to insulation, electric energy stored in the high-voltage capacitor C is discharged through the pointer action coil L to drive a pointer to act, meanwhile, a P2 point can monitor high voltage, the voltage is connected with the MCU 12 through a voltage division unit, the action of the counter can be synchronously monitored by monitoring the voltage through the MCU 12, and synchronous counting with the counter can be realized as long as initial values are aligned. The verification module 9 is able to verify the count by coupling with a non-linear resistor R1.
As shown in fig. 4, the verification module includes a spring 22, a slip ring 20, a sliding pin 21 and a displacement sensor, the slip ring 20 is connected at the connection between the nonlinear resistor R1 and the nonlinear resistor R2, the slip ring 20 is fixed in the casing, the sliding pin 21 is sleeved in the slip ring 20, the outer wall of the sliding pin 21 is abutted to the inner wall of the slip ring 20, one end of the spring 22 is connected to the sliding pin 21, the other end of the spring 22 is fixedly connected to the casing and grounded, the displacement sensor is installed in the casing, the displacement sensor detects the displacement of the sliding pin 21, and the displacement sensor is connected to the MCU 12. When current passes through the spring 22, the spring 22 will shrink a little, the small shrinkage can be detected by a displacement sensor, and when lightning strike does not occur, the lightning arrester 10 has leakage current in milliampere level, the nonlinear resistor R1 is in a high resistance state, the leakage current almost completely passes through the spring 22, at this time, the shrinkage of the spring 22 is small, and the displacement of the sliding pin 21 is small; when the lightning arrester 10 has a fault and the leakage current increases, the contraction amount of the spring 22 increases, the displacement amount of the slide needle 21 increases, and the lightning arrester 10 can be assisted to judge whether the lightning arrester 10 has a lightning fault or not by being located at a sensor. When lightning strikes occur, the spring 22 is equivalent to an inductor, the current of the inductor cannot be transient, the increase of the current flowing through the spring 22 in the lightning strike process is limited, but still the spring 22 has a larger shrinkage, the displacement change can be detected by the sensor, namely, under normal lightning strikes, the voltage increase can occur at the far end of the pointer action coil L, the displacement of the sliding needle 21 can be detected by the sensor to be obviously increased, if only one of the displacement and the displacement is detected, the lightning arrester 10 or the lightning arrester discharge counter 1 has faults, and the online monitoring of the lightning arrester 10 and the lightning arrester discharge counter 1 is realized.
The magnet 16 is annular and is fixedly connected with the sliding needle 21, the magnetic ring 17 is arranged on the magnetic ring fixing piece 18 and is positioned below the magnet 16, the magnetic ring 17 and the magnet 16 attract each other, the magnetic ring fixing piece 18 is clamped with the shell, the magnetic ring adjusting nut 19 is rotatably clamped with the shell, and the magnetic ring adjusting nut 19 and the magnetic ring 17 are fixedly connected through a thread pair. When the detection terminal 4 is installed, the sliding needle 21 is arranged right above the spring 22, the sliding needle 21 compresses the spring 22 by gravity, at the same time, the magnet ring 17 attracts the magnet 16, so that the compression amount of the spring 22 is reduced, the gravity of the slide needle 21 and the attraction force of the magnet 16 of the magnet ring 17 jointly make the spring 22 have a pre-compression amount, and at this time, the position of the slide needle 21 is the initial position, when the detecting terminal 4 is installed with a certain inclination, the gravity of the sliding pin 21 does not completely act on the spring 22, and the magnetic ring 17 is adjusted to make the magnetic ring 17 far away from the magnet 16, the attractive force of the magnet 16 of the magnetic ring 17 is reduced, the sliding pin 21 is returned to the initial position, when there is a current through the spring 22, the spring 22 contracts, causing the magnet 16 to move away from the magnetic ring 17, the attractive force of the magnet 16 on the magnetic ring 17 is weakened, the amount of contraction of the spring 22 is increased, that is, the magnet ring 17 of the magnet 16 can amplify the amount of contraction of the spring 22 caused by the current, thereby improving the ability of detecting the weak current. The displacement sensor is a non-contact displacement sensor. The non-contact displacement sensor comprises a laser emitter 14, a reflection wafer 15 and a light receiver 23, wherein the laser emitter and the light receiver 23 are all arranged in a shell, the reflection wafer 15 is arranged at the end part of a sliding needle 21, the diameter of the reflection wafer 15 is equal to the diameter of a light spot of emergent light of the laser generator, and the light receiver 23 is connected with the MCU 12. When the sliding needle 21 is located at the initial position, the light spot of the emergent light of the laser emitter 14 irradiates the reflection wafer 15 and is totally reflected to the light receiver 23, when the sliding needle 21 is displaced, the light spot of the emergent light of the laser emitter 14 partially moves out of the reflection wafer 15, so that the light intensity received by the light receiver 23 is reduced, and when the light intensity received by the light receiver 23 is reduced and exceeds a set threshold value, the current passing through the spring 22 is considered to exceed the set threshold value, and electric leakage early warning is sent or the lightning stroke auxiliary judgment is sent.
The detection terminal 4 is connected with the lightning arrester discharge counter 1 through the connecting wire 2, detects the count of the lightning arrester discharge counter 1 and sends the count to the data acquisition box 8, the data acquisition box 8 stores the count and reports the count to the server according to a set period, and the discharge times of the lightning arrester 10 in the monitoring area are conveniently monitored through the server.
The power supply module comprises a storage battery BT1, photovoltaic panels 5 and a charging circuit, the detection terminal 4 and the data acquisition box 8 are respectively connected with one photovoltaic panel 5, the detection terminal 4 and the data acquisition box 8 are respectively provided with the storage battery and the charging circuit, and the photovoltaic panels 5 are connected with the storage battery through the charging circuit.
As shown in fig. 5, the charging circuit includes a photovoltaic panel 5 interface J1, a three-terminal regulator U1, a diode D1, a resistor R1, a transistor VT1 and a chip U1, the photovoltaic panel 5 interface J1 is connected to the photovoltaic panel 5, the positive electrode of the photovoltaic panel 5 interface J1 is connected to the input terminal of the three-terminal regulator U1, the output terminal of the three-terminal regulator U1 is connected to the positive electrode of the diode D1, the cathode of the diode D1 is connected to the collector of the transistor VT1 and one end of the resistor R1, the emitter of the transistor VT1 is connected to one end of the resistor R1 and the positive electrode of the battery BT1, the negative electrode of the battery BT1 is grounded, the other end of the resistor R1 is connected to one end of the resistor R1 and the collector of the transistor VT1, the other end of the resistor R1 is connected to the emitter of the photovoltaic panel 5 interface J1 and the transistor VT1, the base of the transistor VT1, the other end of the resistor R6 is connected with one end of the resistor R5 and the chip U2, and the other end of the resistor R5 is grounded.
The detection filtering module comprises an inductor L1, a capacitor C1 and a diode D2, one end of the inductor L1 is connected with the cathode of the diode D1, the other end of the inductor L1 is connected with the anode of the diode D2, one end of the capacitor C1 is connected with the cathode of the diode D2 and the chip U2, and the other end of the capacitor C1 is grounded.
The working principle of the charging circuit is as follows: when the photovoltaic panel 5 outputs power, the triode VT1 is conducted, the photovoltaic panel 5 supplies power to other modules through the three-terminal voltage regulator tube U1 and charges the storage battery BT1, when the photovoltaic panel 5 does not output power, the triode VT1 is cut off, the triode VT2 is conducted, and the storage battery BT1 supplies power to other modules through the triode VT2 and the three-terminal voltage regulator tube U1. The chip U2 detects the output voltage of diode D2 negative pole through the DDV mouth, and when triode VT1 and triode VT2 all cut off, when this voltage is steady, control triode VT1 switches on, and photovoltaic board 5 charges for battery BT1 this moment, and when the voltage reduction appears, control triode VT1 cuts off, if the voltage does not resume, then control triode VT2 switches on.
A remote monitoring method for an arrester discharge counter uses the remote monitoring system for the arrester discharge counter 1, and comprises the following steps:
A) installing the detection terminal 4, enabling the sliding needle 21 to be along the plumb direction, adjusting the magnetic ring adjusting nut 19, enabling the output value of the optical receiver 23 to be maximum, and locking the magnetic ring adjusting nut 19;
B) the MCU 12 collects the output value of the optical receiver 23 and the voltage of the far end of the pointer action coil L in a preset period;
C) when the voltage of the far-end ground of the pointer action coil L is higher than a set threshold, recording the current time T1 until the voltage of the far-end ground of the pointer action coil L restores to the set voltage range, recording the voltage restoring time T2 of the far-end ground of the pointer action coil L, obtaining action time intervals (T1 and T2), and if the output value of the optical receiver 23 is not lower than the preset threshold in the action time intervals (T1 and T2), sending out false alarm, otherwise, synchronously adding one to the counting monitoring value of the lightning arrester 10;
D) and when the output value of the light receiver 23 is lower than a preset threshold value, recording the current time T3, and if the time T3 is not in the time interval (T1, T2), sending out a lightning arrester 10 leakage alarm.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A remote monitoring system of a lightning arrester discharge counter is characterized in that,
the device comprises three detection terminals, a wireless communication module, a data acquisition box, a GSM communication module, a positioning module, a power supply module and a server, wherein each detection terminal comprises a shell, an MCU (microprogrammed control unit) and a connecting wire, one end of each connecting wire is respectively connected with a lightning arrester discharge counter of a three-phase line, the other end of each connecting wire is connected with the MCU, the MCU is installed in the shell, each data acquisition box comprises a box body, a controller and a memory, the controllers and the memories are all installed in the boxes, the memories, the GSM communication module and the positioning module are all connected with the controllers, the MCU is in communication connection with the controllers through the wireless communication module, the power supply module supplies power to other components, and the controllers are in communication connection with the server through the GSM communication module;
the lightning arrester discharge counter comprises a lightning arrester, a nonlinear resistor R1, a nonlinear resistor R2, a high-voltage capacitor C and a pointer action coil L, one end of the lightning arrester is connected with a phase line, the other end of the lightning arrester is connected with one ends of the nonlinear resistor R1 and the nonlinear resistor R2, the other end of the nonlinear resistor R1 is grounded, the other end of the nonlinear resistor R2 is connected with one ends of the high-voltage capacitor C and the pointer action coil L, the other ends of the high-voltage capacitor C and the pointer action coil L are grounded, the verification module is connected with the nonlinear resistor R1 in parallel, and the verification module is connected with the MCU through a connecting wire;
the calibration module comprises a spring, a sliding ring, a sliding needle and a displacement sensor, the sliding ring is connected at the joint of the nonlinear resistor R1 and the nonlinear resistor R2, the sliding ring is fixed in the shell, the sliding needle is sleeved in the sliding ring, the outer wall of the sliding needle is abutted to the inner wall of the sliding ring, one end of the spring is connected with the sliding needle, the other end of the spring is fixedly connected with the shell and grounded, the displacement sensor is installed in the shell and detects the displacement of the sliding needle, and the displacement sensor is connected with the MCU.
2. The remote monitoring system of the lightning arrester discharge counter according to claim 1,
the power supply module comprises a storage battery BT1, a photovoltaic panel and a charging circuit, the detection terminal and the data acquisition box are respectively connected with the photovoltaic panel, the detection terminal and the data acquisition box are respectively provided with the storage battery and the charging circuit, and the photovoltaic panel is connected with the storage battery through the charging circuit.
3. The remote monitoring system of the lightning arrester discharge counter according to claim 2,
the charging circuit comprises a photovoltaic panel interface J, a three-terminal voltage regulator tube U, a diode D, a resistor R, a triode VT and a chip U, wherein the photovoltaic panel interface J is connected with a photovoltaic panel, the anode of the photovoltaic panel interface J is connected with the input end of the three-terminal voltage regulator tube U, the output end of the three-terminal voltage regulator tube U is connected with the anode of the diode D, the cathode of the diode D is connected with the collector of the triode VT and one end of the resistor R, the emitter of the triode VT is connected with one end of the resistor R and the anode of a storage battery BT, the cathode of the storage battery BT is grounded, the other end of the resistor R is connected with one end of the resistor R and the collector of the triode VT, the other end of the resistor R is grounded, one end of the resistor R is connected with the anode of the photovoltaic panel interface J and the emitter of the triode VT, the base of the triode VT and the base of the triode VT are both connected with the chip U, the other end of the resistor R5 is grounded.
4. The remote monitoring system of the lightning arrester discharge counter according to claim 3,
the charging circuit further comprises a detection filtering module, the detection filtering module comprises an inductor L1, a capacitor C1 and a diode D2, one end of the inductor L1 is connected with the cathode of the diode D1, the other end of the inductor L1 is connected with the anode of the diode D2, one end of the capacitor C1 is connected with the cathode of the diode D2 and the chip U2, and the other end of the capacitor C1 is grounded.
5. The remote monitoring system of the lightning arrester discharge counter according to claim 1,
the calibration module further comprises a magnet, a magnetic ring fixing piece and a magnetic ring adjusting nut, the magnet is annular and is fixedly connected with the sliding needle, the magnetic ring is arranged on the magnetic ring fixing piece and is located below the magnet, the magnetic ring and the magnet attract each other, the magnetic ring fixing piece is clamped with the shell, the magnetic ring adjusting nut is rotatably clamped with the shell, and the magnetic ring adjusting nut is fixedly connected with the magnetic ring through a thread pair.
6. The remote monitoring system of the lightning arrester discharge counter according to claim 5,
the displacement sensor is a non-contact displacement sensor.
7. The remote monitoring system of the lightning arrester discharge counter according to claim 6,
the non-contact displacement sensor comprises a laser emitter, a reflection wafer and a light receiver, wherein the laser emitter and the light receiver are both arranged in the shell, the reflection wafer is arranged at the end part of the sliding needle, the diameter of the reflection wafer is equal to the diameter of a light spot of emergent light of the laser generator, and the light receiver is connected with the MCU.
8. A remote monitoring method of a lightning arrester discharge counter using a remote monitoring system of a lightning arrester discharge counter according to claim 7,
the method comprises the following steps:
A) installing a detection terminal, enabling a sliding needle to be along the plumb direction, adjusting a magnetic ring adjusting nut, enabling the output value of a light receiver to be maximum, and locking the magnetic ring adjusting nut;
B) the MCU collects the output value of the light receiver and the voltage of the far end of the pointer action coil L in a preset period;
C) when the voltage of the far-end ground of the pointer action coil L is higher than a set threshold, recording the current time T1 until the voltage of the far-end ground of the pointer action coil L restores to the set voltage range, recording the voltage restoring time T2 of the far-end ground of the pointer action coil L, obtaining action time intervals (T1 and T2), and if the output value of the optical receiver is not lower than the preset threshold in the action time intervals (T1 and T2), sending out false alarm, otherwise, synchronously adding one to the counting monitoring value of the lightning arrester;
D) and when the output value of the light receiver is lower than a preset threshold value, recording the current time T3, and if the time T3 is not in the time interval (T1, T2), sending an arrester leakage alarm.
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