CN114675125A - Temporary grounding device and temporary grounding device early warning system - Google Patents
Temporary grounding device and temporary grounding device early warning system Download PDFInfo
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- CN114675125A CN114675125A CN202210199511.5A CN202210199511A CN114675125A CN 114675125 A CN114675125 A CN 114675125A CN 202210199511 A CN202210199511 A CN 202210199511A CN 114675125 A CN114675125 A CN 114675125A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
The invention discloses a temporary grounding device and a temporary grounding device early warning system, wherein the temporary grounding device comprises a temporary grounding wire, a wire clamp state monitoring assembly, a grounding resistance monitoring assembly and a processor, one end of the temporary grounding wire is installed on a transmission line lead, the other end of the temporary grounding wire is grounded, the wire clamp state monitoring assembly is used for detecting the loosening state of the temporary grounding wire and the transmission line lead, the grounding resistance monitoring assembly is used for detecting the grounding state of the temporary grounding wire, the wire clamp state monitoring assembly and the grounding resistance monitoring assembly are respectively connected with the processor through electric signals, the processor analyzes whether the temporary grounding wire is in a stable grounding state or a detached state according to the loosening state signal transmitted by the wire clamp state monitoring assembly and the grounding state signal transmitted by the grounding resistance monitoring assembly respectively, and the temporary grounding device early warning system remotely provides a warning sound and light prompt, the safe operation of the power grid is ensured, and the life safety of maintainers is improved.
Description
Technical Field
The invention relates to the technical field of power system monitoring, in particular to a temporary grounding device and a temporary grounding device early warning system.
Background
The portable grounding wire is a safety barrier for protecting maintenance personnel, is a life line of electric power personnel, and can prevent adjacent high-voltage lines and equipment from generating induced voltage on power failure lines and equipment or prevent the power failure lines from suddenly receiving power to cause harm to human bodies in the maintenance process, and simultaneously discharge residual charges of the power failure lines and the equipment, thereby ensuring the life safety of maintenance personnel.
Currently, there are two main types of ground wires used: one is a portable grounding wire fixed in a hook-shaped plate spring clamping manner; the other is an operating rod grounding wire fixed in a bolt fastening and clamping mode. The portable grounding wire is usually hung on a power transmission line which is several meters or even dozens of meters away from the ground, and due to the influence of wind power and other factors, the wire clamp of the grounding wire is loosened or even falls off, so that the safety protection function of the grounding wire is lost, and the personal safety of operating personnel is seriously threatened. The problem of poor wire contact that two kinds of earth connection modes of installing all have the not enough pressure to cause leads to overhead line wire and earth connection fixture contact insecure, produces induced voltage under the overhead line power failure state, causes unnecessary danger, or can't play the safety guarantee effect when the unexpected incoming telegram of power failure operation section circuit, mistake power transmission, causes the casualties and circuit equipment to damage.
The ground connection earial drainage passageway is ground resistance's resistance direct influence and has been reached and whether can normally let out electric charge such as circuit, equipment call suddenly, residual charge, response incoming telegram, and the earth connection that uses does not possess unified management function at present, easily because the earth connection still articulates in transmission line after the maintenance work is accomplished, takes place to take the malignant accident of electricity that earth connection mistake transmission arouses, if: the 12.15-disk water power supply station's grounding wire switching-on is a serious misoperation accident, and the direct reason of the accident is that one group of grounding wires on the side of the disconnecting link line of the 110kV Hongtian II disk T line 1852 without removing the switching-on and switching-off.
Whether the contact between the portable grounding wire and the lead is loose or not, the grounding wire is safely disassembled after the maintenance is finished, and the intelligent management of the monitoring is about the safe operation of the power grid and the life safety of maintainers.
Disclosure of Invention
In view of the above, there is a need to provide a temporary grounding device for monitoring grounding reliability in real time during maintenance of a power transmission line.
Meanwhile, the temporary grounding device early warning system is used for monitoring the grounding reliability in real time and monitoring whether the grounding wire is detached after maintenance.
The utility model provides a temporary grounding device, including the earthing for work line, wire clamp state monitoring subassembly, ground resistance monitoring subassembly and treater, the one end of earthing for work line is installed on the transmission line wire, earthing for work line's the other end, wire clamp state monitoring subassembly is used for detecting the not hard up state of earthing for work line and transmission line wire, ground resistance monitoring subassembly is used for detecting the ground state of earthing for work line, wire clamp state monitoring subassembly, ground resistance monitoring subassembly respectively with treater electric signal connection, the treater is according to the not hard up state signal of wire clamp state monitoring subassembly transmission and the ground state signal analysis earthing for ground line that ground resistance monitoring subassembly transmitted respectively whether is in stable ground state or has demolishd the state.
Preferably, the temporary grounding wire comprises a grounding wire and a U-shaped wire clamp, one end of the grounding wire is provided with the U-shaped wire clamp, the U-shaped wire clamp is hung on the power transmission wire to be maintained, and the other end of the grounding wire is grounded; the wire presss from both sides state monitoring subassembly includes a U-shaped body, a pair of high-order sensor and a pair of low level sensor, the laminating of U-shaped body is installed in one side that the U-shaped wire pressed from both sides, a pair of high-order sensor and a pair of low level sensor set up on the U-shaped body, the opening of U-shaped body is kept away from to a pair of high-order sensor, a pair of low level sensor is close to the opening of U-shaped body, a pair of high-order sensor and a pair of low level sensor respectively with treater electric connection, do not have signal transmission's mode monitoring U-shaped wire clamp to be in stable clamping state each other through a pair of high-order sensor by the treater, it is in not hard up state to press from both sides from having the process monitoring U-shaped wire that signal transmission interrupted to the signal transmission each other through a pair of low level sensor.
Preferably, the wire clamp state monitoring assembly further comprises a pair of middle position sensors, the middle position sensor is mounted on the U-shaped body, the pair of high position sensors, the pair of middle position sensors and the pair of low position sensors are sequentially arranged on the U-shaped body, the pair of middle position sensors are located between the pair of high position sensors and the pair of low position sensors, the middle position sensors are electrically connected with the processor, after the U-shaped wire clamp is hung on the conveying line, the transmission line blocks the pair of high-position sensors to ensure that the pair of high-position sensors cannot form signal exchange for mutual transmission and reception, the two sensors of the pair of middle-position sensors can normally transmit and receive signals due to the fact that no blocking object exists between the two sensors, the pair of low-position sensors cannot normally form signal transmission and reception due to the fact that no blocking object exists between the two sensors, and the contact state of the wire clamp and the wire of the power transmission line is a good clamping state; the U-shaped wire clamp is influenced by external force to enable the pair of high-position sensors to be relatively higher than the transmission line wire, so that no signal is transmitted to the pair of high-position sensors, no signal is transmitted to the pair of middle-position sensors, and the contact state of the wire clamp and the transmission line wire is a clamping state of primary loosening; there is signal transmission between a pair of high level sensor, there is signal transmission between a pair of meso position sensor, there is signal transmission between a pair of low level sensor by not having signal transmission to there being signal transmission, and the contact state of wire clamp and transmission line wire is the state of coming loose soon at this moment.
Preferably, the ground resistance monitoring assembly comprises an excitation module, a sampling module and a power supply, the excitation module, the sampling module and the power supply are respectively and electrically connected with the excitation module and the sampling module, the processor controls the excitation module to generate excitation, the power supply respectively supplies power to the processor, the excitation module and the sampling module, the excitation module comprises an AD9850 chip, a first low-pass filter, a power amplifier and a voltage jaw, the AD9850 chip is electrically connected with the first low-pass filter, the first low-pass filter is electrically connected with the power amplifier, the power amplifier is electrically connected with the voltage jaw, the AD9850 chip is electrically connected with the processor, the voltage jaw is sleeved on a ground down lead and is not in contact with the ground down lead, the sampling module comprises an analog-to-digital conversion module, a second low-pass filter, a signal amplifier, a protection circuit, a sampling resistor and a current jaw, and the analog-to-digital conversion module is electrically connected with the second low-pass filter, the second low-pass filter is electrically connected with the signal amplifier, the signal amplifier is electrically connected with the protection circuit, the protection circuit is electrically connected with the sampling resistor, the sampling resistor is electrically connected with the current jaw, the analog-to-digital conversion module is electrically connected with the processor, the current jaw ring is sleeved on the grounding down lead and is not in contact with the grounding down lead, the processor controls the AD9850 chip to generate sine waves, the sine waves sequentially pass through the low-pass filter and the coil of the power amplifier excitation voltage jaw to generate excitation, then, a coil of the voltage jaw generates excitation induction voltage on the detection loop through mutual inductance, the detection loop generates corresponding induction current under the action of the excitation induction voltage, the current jaw returns a current signal from the detection loop through mutual inductance, the current signal is changed into a voltage signal through the sampling resistor, the voltage signal sequentially passes through the signal amplifier and the low-pass filter, and the voltage signal passes through the analog-to-digital conversion module and is input into the main control module to be subjected to multiple sampling operation to obtain a grounding resistance value.
The utility model provides a temporary earthing device early warning system, including a plurality of temporary earthing device, a plurality of communication module, the thing networking, big data server and earth connection intelligent management platform, temporary earthing device and communication module one-to-one and electric connection, the device position information that each communication module will correspond to earth connection state detection, the real-time information of U-shaped wire clamp state, the real-time information of ground resistance passes through thing networking and passes to big data server, earth connection intelligent management platform acquires above-mentioned data from big data server, and manage above-mentioned data, analysis and remote early warning, realize the reliable ground connection of maintenance transmission line in-process temporary earthing line.
Preferably, the temporary grounding device early warning system further comprises a plurality of maintenance reporting modules, each maintenance reporting module is electrically connected with the corresponding communication module, before maintenance, a maintenance person presses a start switch of the maintenance reporting module, the maintenance reporting module generates a maintenance request signal and sends the signal to the communication module, the maintenance request signal is transmitted to the big data server through the communication module and the internet of things in sequence, the grounding wire intelligent management platform starts to manage and control maintenance time after acquiring the maintenance request signal from the big data server, when the preset maintenance time is about to be used up, the grounding wire intelligent management platform generates warning prompt information by detecting whether the maintenance point still has real-time information of a U-shaped wire clamp state or real-time information of grounding resistance, and sends the warning prompt information to the maintenance reporting module through the internet of things and the communication module, and the maintenance reporting module generates warning sound to prompt the maintenance person to remove the temporary grounding device after the maintenance is completed, the temporary grounding wire can be removed in time after maintenance, so that the occurrence of closing accidents with the grounding wire is avoided, and the safety of a power grid is improved.
Preferably, interim earthing device early warning system still includes a plurality of GPS modules and alarm module, every GPS module and alarm module respectively with treater electric connection, the GPS module is used for giving communication module with the geographical position information transmission that interim earthing device was located, the exception signal of treater according to wire clamp state monitoring subassembly, ground resistance monitoring subassembly and earth connection intelligent management platform feedback, treater control alarm module sends out alarm suggestion sound, or alarm suggestion light, or alarm suggestion sound and alarm suggestion light.
Among the above-mentioned interim earthing device, through the online elasticity situation of monitoring U-shaped wire clamp with lasting of U-shaped wire clamp state detection module to and through whether ground resistance detection module is online with lasting ground resistance detection within normal range, carry out statistics management to the information of U-shaped wire clamp state detection module feedback and the information of ground resistance detection module feedback simultaneously through control module, give precautionary measure in advance, ensure the safe operation of electric wire netting, improve maintainer's life safety.
Drawings
Fig. 1 is a block diagram of a temporary grounding device according to the present invention.
Fig. 2 is a front view of the temporary grounding wire and the wire clamp state monitoring assembly of the invention attached to a power transmission line.
Fig. 3 is a perspective view of the temporary grounding wire and the wire clamp state monitoring assembly of the invention being hung on a power transmission line.
Fig. 4 is a block diagram of an embodiment of a ground resistance detection module.
Fig. 5 is a block diagram of the ground resistance detection module according to the preferred embodiment.
Fig. 6 is a system configuration block diagram of the temporary earthing device early warning system.
In the figure: the temporary grounding device comprises a temporary grounding device 100, a temporary grounding wire 10, a grounding wire 11, a U-shaped wire clamp 12, a wire clamp state monitoring assembly 20, a U-shaped body 21, a pair of high sensors 22, a pair of low sensors 23, a pair of middle sensors 24, a grounding resistance monitoring assembly 30, an excitation module 31, a sampling module 32, a power supply 33, an AD9850 chip 311, a first low-pass filter 312, a power amplifier 313, a voltage clamp 314, an analog-to-digital conversion module 321, a second low-pass filter 322, a signal amplifier 323, a protection circuit 324, a sampling resistor 325, a current clamp 326, a processor 40, a temporary grounding device early warning system 200, a communication module 210, an Internet of things 220, a big data server 230, a grounding wire intelligent management platform 240, a reporting and maintaining module 250, a GPS module 260 and an alarm module 270.
Detailed Description
The technical solutions and effects of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings of the present invention.
Referring to fig. 1, the temporary grounding device 100 includes a temporary grounding wire 10, a wire clamp state monitoring assembly 20, a grounding resistance monitoring assembly 30 and a processor 40, one end of the temporary grounding wire 10 is installed on a transmission line conductor, the other end of the temporary grounding wire 10 is grounded, the wire clamp state monitoring assembly 20 is used for detecting the loosening state of the temporary grounding wire 10 and the transmission line conductor, the grounding resistance monitoring assembly 30 is used for detecting the grounding state of the temporary grounding wire 10, the wire clamp state monitoring assembly 20 and the grounding resistance monitoring assembly 30 are respectively connected with the processor 40 through electric signals, and the processor 40 analyzes whether the temporary grounding wire 10 is in a stable grounding state or is detached according to the loosening state signal transmitted by the wire clamp state monitoring assembly 20 and the grounding state signal transmitted by the grounding resistance monitoring assembly 30.
Referring to fig. 2 and 3, the temporary grounding wire 10 includes a grounding wire 11 and a U-shaped wire clamp 12, wherein one end of the grounding wire 11 is provided with the U-shaped wire clamp 12, the U-shaped wire clamp 12 is hung on a power transmission wire to be maintained, and the other end of the grounding wire 11 is grounded; the wire clamp condition monitoring assembly 20 includes a U-shaped body 21, the U-shaped lead clamp comprises a pair of high-position sensors 22 and a pair of low-position sensors 23, the shape of a U-shaped body 21 is matched with that of the U-shaped lead clamp 12, the U-shaped body 21 is attached to one side of the U-shaped lead clamp 12, the pair of high-position sensors 22 and the pair of low-position sensors 23 are arranged on the U-shaped body 21, the pair of high-position sensors 22 are far away from the opening of the U-shaped body 21, the pair of low-position sensors 23 are close to the opening of the U-shaped body 21, the pair of high-position sensors 22 and the pair of low-position sensors 23 are respectively and electrically connected with a processor 40, the processor 40 monitors that the U-shaped lead clamp 12 is in a stable clamping state in a mode that the pair of high-position sensors 22 do not transmit signals to each other, and the processor 40 monitors that the U-shaped lead clamp 12 is in a loosening state through a process that the pair of low-position sensors 23 transmit signals to interrupt signals.
Referring to fig. 2 and 3, the wire clamp state monitoring assembly 20 further includes a pair of middle sensors 24, the middle sensor 24 is mounted on the U-shaped body 21, the pair of high sensors 22, the pair of middle sensors 24 and the pair of low sensors 23 are sequentially arranged on the U-shaped body 21, the pair of middle sensors 24 is located between the pair of high sensors 22 and the pair of low sensors 23, the middle sensor 24 is electrically connected to the processor 40, after the U-shaped wire clamp 12 is hung on the transmission line, the transmission line blocks the pair of high sensors 22 so that the pair of high sensors 22 cannot form mutual transmission and reception signal exchange, the two sensors of the pair of middle sensors 24 can normally transmit and receive signals due to no blocking, and the pair of low sensors 23 can normally form signal transmission and reception due to no blocking, at this time, the processor 40 determines that the contact state of the U-shaped wire clamp 12 and the transmission line wire is in a good clamping state (ii) a The U-shaped wire clamp 12 is influenced by external force to enable the pair of high-position sensors 22 to be relatively higher than the transmission line wire, no signal is transmitted to signal transmission between the pair of high-position sensors 22, no signal is transmitted to signal transmission between the pair of middle-position sensors 24, and the processor 40 judges that the contact state of the U-shaped wire clamp 12 and the transmission line wire is a clamping state of primary loosening; the signal transmission is carried out between the pair of high position sensors 22, the signal transmission is carried out between the pair of middle position sensors 24, the signal transmission is carried out between the pair of low position sensors 23 from no signal transmission, and at the moment, the processor 40 judges that the contact state of the U-shaped wire clamp 12 and the power transmission line wire is the loosening state.
Referring to fig. 4 and 5, the ground resistance monitoring assembly 30 includes an excitation module 31, a sampling module 32, and a power supply 33, the excitation module 31, the sampling module 32, and the power supply 33, the processor 40 is electrically connected to the excitation module 31 and the sampling module 32, the processor 40 controls the excitation module 31 to generate excitation, the power supply 33 supplies power to the processor 40, the excitation module 31, and the sampling module 32, respectively, the excitation module 31 includes an AD9850 chip 311, a first low pass filter 312, a power amplifier 313, and a voltage clamp 314, the AD9850 chip 311 is electrically connected to the first low pass filter 312, the first low pass filter 312 is electrically connected to the power amplifier 313, the power amplifier 313 is electrically connected to the voltage clamp 314, the AD9850 chip 311 is electrically connected to the processor 40, the voltage clamp 314 is looped around the ground lead-down line and is not in contact, the sampling module 32 includes an analog-to-digital conversion module 321, a second low pass filter 322, and the power supply 33 are electrically connected to the ground lead-down line and not in contact with the ground lead-to the ground lead-down line, The signal amplifier 323, the protection circuit 324, the sampling resistor 325 and the current clamp 326, the analog-to-digital conversion module 321 is electrically connected with the second low pass filter 322, the second low pass filter 322 is electrically connected with the signal amplifier 323, the signal amplifier 323 is electrically connected with the protection circuit 324, the protection circuit 324 is electrically connected with the sampling resistor 325, the sampling resistor 325 is electrically connected with the current clamp 326, the analog-to-digital conversion module 321 is electrically connected with the processor 40, the current clamp 326 is sleeved on the ground down lead and is not in contact with the ground down lead, the processor 40 controls the AD9850 chip 311 to generate a sine wave, the sine wave sequentially passes through the first low pass filter 312 and the power amplifier 313 to excite the coil of the voltage clamp 314 to generate excitation, then the coil of the voltage clamp 314 generates excitation induction voltage on the detection circuit through mutual inductance, the detection circuit generates corresponding induction current under the action of the excitation induction voltage, the current clamp 326 mutually induces a current signal from the detection loop, the current signal is changed into a voltage signal through the sampling resistor 325, the voltage signal sequentially passes through the signal amplifier 323 and the second low-pass filter 322, and the voltage signal passes through the analog-to-digital conversion module 321 and is input into the main control module to be sampled for a plurality of times to obtain a value.
Referring to fig. 6, the temporary grounding device early warning system 200 includes a plurality of temporary grounding devices 100, a plurality of communication modules 210, an internet of things 220, a big data server 230 and a grounding line intelligent management platform 240, the temporary grounding devices 100 and the communication modules 210 are in one-to-one correspondence and electrically connected, each communication module 210 uploads position information of a corresponding device for detecting the state of a grounding line 11, real-time information of the state of a U-shaped wire clamp 12 and real-time information of grounding resistance to the big data server 230 through the internet of things 220, and the grounding line intelligent management platform 240 obtains the data from the big data server 230 and stores, manages, analyzes and remotely warns the data, so as to achieve reliable grounding of the temporary grounding line 10 in the process of maintaining the power transmission line.
Referring to fig. 6, the temporary grounding device early warning system 200 further includes a plurality of maintenance reporting modules 250, each maintenance reporting module 250 is electrically connected to a corresponding communication module 210, before maintenance, a maintenance worker presses a start switch of the maintenance reporting module 250, the maintenance reporting module 250 generates a maintenance request signal and sends the signal to the communication module 210, the maintenance request signal is sequentially transmitted to the big data server 230 through the communication module 210 and the internet of things 220, the ground wire intelligent management platform 240 starts to manage and control maintenance time after obtaining the maintenance request signal from the big data server 230, when the preset maintenance time is about to be used up, the ground wire intelligent management platform 240 generates warning prompt information by detecting whether the maintenance point still has real-time information of the state of the U-shaped wire clamp 12 or real-time information of the ground resistance of the internet of things, and sends the warning prompt information to the maintenance reporting module 250 through the communication module 220 and the communication module 210, the maintenance reporting module 250 generates a warning sound to prompt maintenance personnel to remove the temporary grounding device 100 after the maintenance is completed, so that the temporary grounding wire 10 can be removed in time after the maintenance, the occurrence of a closing accident with a grounding wire is avoided, and the safety of a power grid is improved.
Referring to fig. 6, the temporary earthing device early warning system 200 further includes a plurality of GPS modules 260 and alarm modules 270, each GPS module 260 and each alarm module 270 are electrically connected to the processor 40, the GPS module 260 is configured to transmit the geographical location information of the temporary earthing device 100 to the communication module 210, the processor 40 controls the alarm modules 270 to emit alarm prompt sound, or alarm prompt light, or alarm prompt sound and alarm prompt light according to the abnormal signal fed back by the wire clamp state monitoring assembly 20, the earth resistance monitoring assembly 30, and the earth wire intelligent management platform 240.
Claims (6)
1. A temporary grounding device, characterized by: the temporary grounding wire comprises a temporary grounding wire, a wire clamp state monitoring assembly, a grounding resistance monitoring assembly and a processor, wherein one end of the temporary grounding wire is installed on a power transmission line conductor, the other end of the temporary grounding wire is grounded, the wire clamp state monitoring assembly is used for detecting the loosening state of the temporary grounding wire and the power transmission line conductor, the grounding resistance monitoring assembly is used for detecting the grounding state of the temporary grounding wire, the wire clamp state monitoring assembly and the grounding resistance monitoring assembly are respectively in electric signal connection with the processor, and the processor analyzes whether the temporary grounding wire is in a stable grounding state or is detached according to a loosening state signal transmitted by the wire clamp state monitoring assembly and a grounding state signal transmitted by the grounding resistance monitoring assembly.
2. A temporary grounding device as claimed in claim 2, wherein: the conducting wire clamp state monitoring assembly comprises a U-shaped body, a pair of high sensors, a pair of middle sensors and a pair of low sensors, wherein the U-shaped body is attached to one side of the U-shaped conducting wire clamp, the pair of high sensors and the pair of low sensors are arranged on the U-shaped body, the pair of high sensors are far away from an opening of the U-shaped body, the pair of low sensors are close to the opening of the U-shaped body, the pair of high sensors and the pair of low sensors are respectively and electrically connected with a processor, the middle sensors are arranged on the U-shaped body, the pair of middle sensors are positioned between the pair of high sensors and the pair of low sensors, the middle sensors are electrically connected with the processor, after the U-shaped conducting wire clamp is leaned on a conveying line, the conveying line blocks the pair of high sensors so that mutual transmission and receiving signal exchange cannot be formed between the pair of high sensors, and normal signal transmission and receiving can be realized between the two sensors of the pair of middle sensors due to no blocking object, the pair of low-position sensors are not blocked, signal transmission and signal reception can be normally formed, and the contact state of the wire clamp and the wire of the power transmission line is a good clamping state; the U-shaped wire clamp is influenced by external force to enable the pair of high-position sensors to be relatively higher than the transmission line wire, so that no signal is transmitted to the pair of high-position sensors, no signal is transmitted to the pair of middle-position sensors, and the contact state of the wire clamp and the transmission line wire is a clamping state of primary loosening; there is signal transmission between a pair of high level sensor, there is signal transmission between a pair of meso position sensor, there is signal transmission between a pair of low level sensor by not having signal transmission to there being signal transmission, and the contact state of wire clamp and transmission line wire is the state of coming loose soon at this moment.
3. A temporary grounding device as claimed in any one of claims 1 to 2, wherein: the ground resistance monitoring assembly comprises an excitation module, a sampling module and a power supply, the excitation module, the sampling module and the power supply are respectively and electrically connected with the excitation module and the sampling module, the processor controls the excitation module to generate excitation, the power supply respectively supplies power to the processor, the excitation module and the sampling module, the excitation module comprises an AD9850 chip, a first low-pass filter, a power amplifier and a voltage jaw, the AD9850 chip is electrically connected with the first low-pass filter, the first low-pass filter is electrically connected with the power amplifier, the power amplifier is electrically connected with the voltage jaw, the AD9850 chip is electrically connected with the processor, the voltage jaw is sleeved on a ground down lead and is not in contact with the ground down lead, the sampling module comprises an analog-to-digital conversion module, a second low-pass filter, a signal amplifier, a protection circuit, a sampling resistor and a current jaw, and the analog-to-digital conversion module is electrically connected with the second low-pass filter, the second low-pass filter is electrically connected with the signal amplifier, the signal amplifier is electrically connected with the protection circuit, the protection circuit is electrically connected with the sampling resistor, the sampling resistor is electrically connected with the current jaw, the analog-to-digital conversion module is electrically connected with the processor, the current jaw ring is sleeved on the grounding down lead and is not in contact with the grounding down lead, the processor controls the AD9850 chip to generate sine waves, the sine waves sequentially pass through the low-pass filter and the coil of the power amplifier excitation voltage jaw to generate excitation, then, a coil of the voltage jaw generates excitation induction voltage on the detection loop through mutual inductance, the detection loop generates corresponding induction current under the action of the excitation induction voltage, the current jaw returns a current signal from the detection loop through mutual inductance, the current signal is changed into a voltage signal through the sampling resistor, the voltage signal sequentially passes through the signal amplifier and the low-pass filter, and the voltage signal passes through the analog-to-digital conversion module and is input into the main control module to be subjected to multiple sampling operation to obtain a grounding resistance value.
4. The utility model provides a interim earthing device early warning system which characterized in that: including a plurality of earthing device temporarily, a plurality of communication module, the thing networking, big data server and earth connection intelligent management platform, earthing device temporarily and communication module one-to-one and electric connection, each communication module is with the position information that the device that corresponds to earth connection state detection was located, the real-time information of U-shaped wire clamp state, the real-time information of ground resistance passes through thing networking and passes to big data server, earth connection intelligent management platform acquires above-mentioned data from big data server, and manage above-mentioned data, analysis and remote early warning, realize the reliable ground connection of maintenance transmission line in-process earthing line temporarily.
5. The temporary grounding device early warning system of claim 4, wherein: the temporary grounding device early warning system also comprises a plurality of maintenance reporting modules, each maintenance reporting module is electrically connected with the corresponding communication module, before maintenance, a maintenance person presses a starting switch of the maintenance reporting module, the maintenance reporting module generates a maintenance request signal and sends the signal to the communication module, the maintenance request signal is sequentially transmitted to the big data server through the communication module and the Internet of things, the grounding wire intelligent management platform starts to control maintenance time after acquiring the maintenance request signal from the big data server, when the preset maintenance time is about to be used up, the grounding wire intelligent management platform generates warning prompt information by detecting whether the maintenance point still has real-time information of the state of a U-shaped wire clamp or real-time information of grounding resistance, and sends the warning prompt information to the reporting maintenance module through the Internet of things and the communication module, and the maintenance reporting module generates warning sound to prompt the maintenance person to remove the temporary grounding device after maintenance is completed, the temporary grounding wire can be removed in time after maintenance, so that the occurrence of closing accidents with the grounding wire is avoided, and the safety of a power grid is improved.
6. The temporary grounding device warning system of claim 5, wherein: the temporary grounding device early warning system further comprises a plurality of GPS modules and an alarm module, each GPS module and the alarm module are respectively electrically connected with the processor, the GPS modules are used for transmitting geographical position information of the temporary grounding device to the communication module, the processor controls the alarm module to send alarm prompting sound or alarm prompting light or alarm prompting sound and alarm prompting light according to abnormal signals fed back by the wire clamp state monitoring assembly, the ground resistance monitoring assembly and the ground wire intelligent management platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210199511.5A CN114675125A (en) | 2022-03-02 | 2022-03-02 | Temporary grounding device and temporary grounding device early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210199511.5A CN114675125A (en) | 2022-03-02 | 2022-03-02 | Temporary grounding device and temporary grounding device early warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117734609A (en) * | 2024-02-20 | 2024-03-22 | 南京德沃克自动化有限公司 | Intelligent state monitoring system and method based on electrostatic grounding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117734609A (en) * | 2024-02-20 | 2024-03-22 | 南京德沃克自动化有限公司 | Intelligent state monitoring system and method based on electrostatic grounding device |
| CN117734609B (en) * | 2024-02-20 | 2024-06-04 | 南京德沃克自动化有限公司 | Intelligent state monitoring system and method based on electrostatic grounding device |
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