A detection system for the installation state of the grounding wire of a power line

Abstract

The present invention discloses a detection system for the installation state of a grounding wire of a power line, comprising: a coil clamp and the grounding wire of the power line; a hollow hole is provided at the jaw of the coil clamp, and the grounding wire is clamped in the hollow hole through the coil clamp; a voltage transformer coil, a current transformer coil and a processor are arranged inside the jaw of the coil clamp; the voltage transformer coil is used to generate an excitation voltage and inject the excitation voltage into the grounding wire; the current transformer coil is used to generate a detection current after the excitation voltage is injected into the grounding wire and send the detection current to the processor; the processor is used to judge the installation state of the grounding wire of the power line according to the detection current; the installation state includes a disconnected state and a connected state. The present invention improves the timeliness and accuracy of detecting and sensing the installation state of the grounding wire of the power line.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid status detection, and particularly to a detection system for the grounding installation status of a power line. Background Art

[0002] In the power system, malignant misoperations of sending power with the grounding wire connected occur from time to time. Therefore, removing all grounding wires before powering on the power line is a key measure to prevent malignant misoperations.

[0003] Currently, for detecting the installation status of the grounding wire in a power line, the main method is to measure the insulation resistance of the line conductor using an insulation resistance tester for analysis and judgment, so as to check whether the grounding wire of the power line has been removed. When measuring the insulation resistance of the line conductor using an insulation resistance tester, all grounding wires of the line must be removed first, and then the measuring leads are reconnected for measurement. However, using an insulation resistance tester for measurement has cumbersome wiring, complicated operation, time-consuming and laborious; moreover, the voltage measured by the insulation resistance tester is not low, and the induced voltage of the line during measurement may be even higher, making it easy to have electric shock problems.

[0004] Therefore, there is an urgent need for a detection system that can improve the timeliness and accuracy of detecting the installation status of the grounding wire of a power line. Summary of the Invention

[0005] The present invention provides a detection method, device, equipment and storage medium for the grounding installation status of a power line to solve the technical problems of low timeliness and accuracy of detecting the installation status of the grounding wire of a power line in the prior art and possible electric shock during measurement.

[0006] To solve the above technical problems, an embodiment of the present invention provides a detection system for the installation status of a power line grounding wire, including: a coil clamp and the grounding wire of the power line; a hollow hole is provided at the jaw of the coil clamp, and the grounding wire is clamped in the hollow hole through the coil clamp; a voltage transformer coil, a current transformer coil and a processor are arranged inside the jaw of the coil clamp;

[0007] The voltage transformer coil is used to generate an excitation voltage and inject the excitation voltage into the grounding wire;

[0008] The current transformer coil is used to generate a detection current after injecting the excitation voltage into the grounding wire and send the detection current to the processor;

[0009] The processor is used to judge the installation status of the grounding wire of the power line according to the detection current; the installation status includes a disconnected state and a connected state.

[0010] As a preferred solution, the coil clamp is further provided with a power supply module and a voltage sampling module; the input end of the power supply module is connected to the processor, and the output end of the power supply module is connected to the input end of the voltage transformer coil;

[0011] The processor is further configured to generate a control signal corresponding to the voltage in response to the voltage set by the user, and send the control signal to the power supply module;

[0012] The power supply module is configured to receive the control signal, and generate an excitation current according to the control signal and the specification of the voltage transformer coil, and input the excitation current into the voltage transformer coil, so that the voltage transformer coil generates an excitation voltage under the circulation of the excitation current;

[0013] The voltage sampling module is configured to sample the excitation voltage output by the voltage module, so that the processor judges the sampled excitation voltage; when the excitation voltage is less than or greater than the voltage set by the user, an excitation voltage abnormal signal is generated, and the power supply module is enabled to sequentially increase the excitation voltage step by step according to a preset excitation voltage gradient table, so as to record the respectively generated excitation voltages, obtain and output an excitation voltage report; when the excitation voltage is equal to the voltage set by the user, an excitation voltage normal signal is generated.

[0014] As a preferred solution, the coil clamp is further provided with a current sampling module; the input end of the current sampling module is connected to the output end of the current transformer coil, and the output end of the current sampling module is connected to the processor;

[0015] The current sampling module is configured to sample the detection current generated by the current transformer coil, and send the data of the sampled detection current to the processor, so that the processor judges the installation state of the grounding wire according to the data of the detection current.

[0016] As a preferred solution, the processor is configured to judge the installation state of the grounding wire of the power line according to the detection current, specifically including:

[0017] The processor calculates the loop resistance of the grounding wire according to the voltage set by the user and the data of the detection current;

[0018] If the value of the loop resistance tends to infinity, a first feedback signal indicating that the grounding wire of the power line is in an open state is generated;

[0019] If the value of the loop resistance is a fixed value and less than a preset value, a second feedback signal indicating that the grounding wire of the power line is in a connected state is generated.

[0020] As a preferred solution, an LED display module, a communication module and an antenna are further provided inside the coil clamp; the LED display module is connected to the processor, the output end of the communication module is connected to the antenna, and the input end of the communication module is connected to the processor;

[0021] The processor is configured to send the generated first feedback signal or second feedback signal to the communication module;

[0022] The LED display module is configured to display the voltage set by the user, the data of the detected current and the installation state of the ground wire;

[0023] The communication module is configured to receive and send the first feedback signal or the second feedback signal to the terminal device through the antenna; wherein, the terminal device includes a monitoring computer and a mobile terminal.

[0024] As a preferred solution, an energy harvesting coil and an energy harvesting control module are provided inside the jaws of the coil clamp; the first input end of the energy harvesting control module is connected to the processor, the second input end of the energy harvesting control module is connected to the energy harvesting coil, and a conduction switch is provided between the energy harvesting control module and the energy harvesting coil;

[0025] The processor is further configured to generate and continuously send a charging control signal to the energy harvesting control module in response to the user turning on the charging switch;

[0026] The energy harvesting control module is configured to receive the charging control signal and control the conduction switch to disconnect according to the charging control signal;

[0027] The energy harvesting coil is configured to generate a corresponding induced current in response to the current conducted in the ground wire and transmit the induced current to the energy harvesting control module.

[0028] As a preferred solution, a rectification module, a filtering module, an overvoltage protection module, an energy storage module and a DC-DC converter are further provided inside the coil clamp;

[0029] The output end of the energy harvesting control module is connected to the input end of the rectification module, the output end of the rectification module is connected to the input end of the filtering module, the output end of the filtering module is connected to the input end of the overvoltage protection module, the first output end of the overvoltage protection module is connected to the input end of the energy storage module, the output end of the energy storage module is connected to the input end of the DC-DC converter, and the first output end of the DC-DC converter is connected to the processor;

[0030] The energy harvesting control module is further configured to transmit the induced current to the rectification module to rectify, filter and store the induced current;

[0031] The DC-DC converter is used to transform the output voltage of the energy storage module, so as to provide the operating voltage for the processor.

[0032] As a preferred solution, the second output terminal of the overvoltage protection module is connected to the communication module, and the second output terminal of the DC-DC converter is connected to the communication module;

[0033] The overvoltage protection module is also used to send the charging current information and charging voltage information input to the energy storage circuit to the communication module, so that the communication module can send the charging voltage information and charging current information to the terminal device;

[0034] The DC-DC converter is also used to provide the operating voltage for the communication module.

[0035] As a preferred solution, the processor is also used to interrupt the generation of the charging control signal in response to the user closing the charging switch;

[0036] The energy acquisition control module is also used to control the conduction switch to close when the charging control signal cannot be received, so that the induced current of the energy acquisition coil cannot be transmitted to the energy acquisition control module.

[0037] As a preferred solution, the coil clamp includes a first clamp and a second clamp;

[0038] The voltage transformer coil is arranged in the first clamp;

[0039] The current transformer coil is arranged in the second clamp. Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0040] The technical solution of the present invention changes the existing measurement mode of the insulation resistance of the line conductor using an insulation megger, and uses a coil clamp to detect the installation mode of the grounding wire of the power line, so as to realize an effective and convenient inspection of whether the grounding wire of the power line is removed. There is no need to connect the insulation megger to the power line, which improves the perception timeliness and accuracy. It can conveniently and quickly clamp onto the grounding wire of the power line. At the same time, there is no need to climb the electric tower or disassemble and reconnect the megger to detect the grounding state, and it can effectively prevent the problem of electric shock caused by induced electricity during the measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 : is a schematic diagram of a detection system for the installation state of the grounding wire of a power line provided by an embodiment of the present invention;

[0042] Figure 2 : is an internal schematic diagram of the jaw of the coil clamp provided by an embodiment of the present invention with the upper cover removed;

[0043] Figure 3 : Perspective schematic diagram of the side of the coil clamp provided by the embodiment of the present invention;

[0044] Figure 4 : Schematic diagram of detecting the installation state of the grounding wire of the coil clamp provided by the embodiment of the present invention;

[0045] Figure 5 : Schematic diagram of the internal circuit of the coil clamp provided by the embodiment of the present invention;

[0046] Figure 6 : Schematic diagram of the internal circuit of the coil clamp including an energy-taking coil provided by the embodiment of the present invention;

[0047] Figure 7 : Perspective schematic diagram of the side of the coil clamp including an energy-taking coil provided by the embodiment of the present invention;

[0048] Among them, the reference numerals of the drawings in the specification are as follows:

[0049] Coil clamp 01, grounding wire 02, power line 03, hollow hole 011, voltage transformer coil 012, current transformer coil 013, processor 014, power supply module 015, voltage sampling module 016, current sampling module 017, LED display module 018, communication module 019, antenna 020, energy-taking coil 190, energy-taking control module 191, rectification module 192, filtering module 193, overvoltage protection module 194, energy storage module 195, DC-DC converter 196. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] Embodiment 1

[0052] Please refer to Figure 1 , Figure 2 and Figure 3, A detection system for the installation state of a grounding wire of a power line provided by an embodiment of the present invention includes: a coil clamp 01 and a grounding wire 02 of the power line; a hollow hole 011 is provided at the jaw of the coil clamp 01, and the grounding wire 02 is clamped in the hollow hole 011 through the coil clamp 01; a voltage transformer coil 012, a current transformer coil 013 and a processor 014 are arranged inside the jaw of the coil clamp 01.

[0053] It should be noted that, please refer to Figure 1 , which is a schematic diagram of the coil clamp 01 in this embodiment. The coil clamp 01 is composed of two clamping arms. One end of the clamping arm is the hand-held part, and the other end is the jaw. The center of the jaw is a hollow hole 011, which is convenient for clamping the grounding wire 02 of the power line 03 in the hollow hole 011 after the coil clamp 01 is opened. Please refer to Figure 2 , which is an internal structure diagram of the jaw of the coil clamp 01, that is, the jaw of the coil clamp 01 is surrounded by a coil winding around the hollow hole 011, and the coil windings are connected in sequence, so that when the jaw is in the closed state, the current flowing through the grounding wire 02 of the power line 03 can be induced. Further, please refer to Figure 3 , the voltage transformer coil 012 and the current transformer coil 013 are both arranged inside the jaw of the same coil clamp 01. In order to avoid the influence between the two mutual inductance coils, an insulating baffle for electromagnetic blocking is arranged in the middle of the jaw. Among them, the processor 014 is arranged inside the clamping arm at the hand-held part.

[0054] As a preferred solution of this embodiment, the coil clamp 01 includes a first clamp and a second clamp; the voltage transformer coil 012 is arranged in the first clamp; the current transformer coil 013 is arranged in the second clamp. It can be understood that by placing different mutual inductance coils in different clamps, the number of turns of the windings corresponding to each coil, the number of turns of the coil, etc. can be further increased, so as to further improve the induction accuracy and induction range of the induced current in the grounding wire 02 of the power line 03, and then improve the detection accuracy of the installation state of the grounding wire 02.

[0055] In a preferred embodiment, since the two coils are respectively placed in different clamps, there is a corresponding main unit connected to the first clamp and the second clamp, so that the processor 014 is arranged in the main unit to improve the convenience of measurement operation.

[0056] The voltage transformer coil 012 is used to generate an excitation voltage and inject the excitation voltage into the grounding wire 02.

[0057] The current transformer coil 013 is used to generate a detection current after injecting the excitation voltage into the grounding wire 02 and send the detection current to the processor 014.

[0058] The processor 014 is configured to determine the installation state of the ground wire 02 of the power line 03 according to the detected current; the installation state includes a disconnected state and a connected state.

[0059] It should be noted that, please refer to Figure 4 , the coil clamp 01 detects the installation state of the ground wire 02 of the power line 03, and then checks whether the ground wire 02 (installation state) of the power line 03 has been removed, so as to avoid the malignant misoperation of energizing with the ground wire in the power system.

[0060] As a preferred solution of this embodiment, please refer to Figure 5 , the coil clamp 01 is further provided with a power supply module 015 and a voltage sampling module 016; the input end of the power supply module 015 is connected to the processor 014, and the output end of the power supply module 015 is connected to the input end of the voltage transformer coil 012; the processor 014 is further configured to generate a control signal corresponding to the voltage in response to the voltage set by the user, and send the control signal to the power supply module 015; the power supply module 015 is configured to receive the control signal, and generate an excitation current according to the control signal and the specification of the voltage transformer coil 012, and input the excitation current into the voltage transformer coil 012, so that the voltage transformer coil 012 generates an excitation voltage under the flow of the excitation current; the voltage sampling module 016 is configured to sample the excitation voltage output by the voltage module, so that the processor judges the sampled excitation voltage; when the excitation voltage is less than or greater than the voltage set by the user, an excitation voltage abnormal signal is generated, and the power supply module 015 is made to sequentially increase the excitation voltage step by step according to a preset excitation voltage gradient table, so as to record the respectively generated excitation voltages, obtain and output an excitation voltage report; when the excitation voltage is equal to the voltage set by the user, an excitation voltage normal signal is generated.

[0061] It should be noted that the power supply module 015 can control the voltage transformer coil 012 to generate a corresponding excitation voltage through the voltage set by the user, so as to ensure the accuracy of the installation state detection to be performed. The power supply module 015 outputs a corresponding excitation current, so that the voltage transformer coil 012 generates a corresponding excitation voltage under the action of the excitation current, and then there may be a corresponding induced current flowing in the ground wire 02.

[0062] Furthermore, through the voltage sampling module 016, it is possible to judge the excitation voltage generated by the power supply module 015, and then judge whether the generated excitation voltage can reach the voltage value set by the user, so as to avoid the error of judging the installation state of the grounding wire from increasing due to the excessive or too small excitation voltage. When the excitation voltage is less than or greater than the voltage set by the user, the excitation voltage is increased step by step in turn according to the preset excitation voltage gradient table, and the generated excitation voltages are recorded respectively, and then a corresponding excitation voltage report is generated, which can facilitate the user to judge and identify whether there are problems such as faults in the overall device.

[0063] As a preferred solution of this embodiment, please refer to Figure 5 , the coil clamp 01 is further provided with a current sampling module 017; the input end of the current sampling module 017 is connected to the output end of the current transformer coil 013, and the output end of the current sampling module 017 is connected to the processor 014; the current sampling module 017 is used to sample the detection current generated by the current transformer coil 013 and send the sampled detection current data to the processor 014, so that the processor 014 judges the installation state of the grounding wire 02 according to the detection current data.

[0064] In this embodiment, due to the action of the voltage transformer coil 012, there is a corresponding electric potential on the grounding wire 02. When the grounding wire 02 is in the connected state, a corresponding induced current will be generated. Therefore, the current sampling module 017 can sample the detection current generated in the current transformer coil 013 and then feedback and transmit it to the processor 014. That is, it is possible for the processor 014 to judge the installation state (connected or disconnected) of the grounding wire 02 according to the data of the detection current.

[0065] As a preferred solution of this embodiment, the processor 014 is used to judge the installation state of the grounding wire 02 of the power line 03 according to the detection current, specifically including:

[0066] The processor 014 calculates the loop resistance of the grounding wire 02 according to the voltage set by the user and the data of the detection current; if the resistance value of the loop resistance tends to infinity, a first feedback signal indicating that the grounding wire 02 of the power line 03 is in the disconnected state is generated; if the resistance value of the loop resistance is a fixed value and less than a preset value, a second feedback signal indicating that the grounding wire 02 of the power line 03 is in the connected state is generated.

[0067] In this embodiment, determining the installation state of the earthing wire of the power line 03 is essentially achieved by means of the injected excitation voltage and the induced current of the corresponding loop. That is, by injecting the excitation voltage U through the voltage transformer coil 012, a current I can be generated in the closed-loop circuit, and the resistance value of the earthing wire 02 loop is calculated. Then, the determination is made based on the loop resistance. When the earthing wire 02 of the power line 03 is disconnected, the power line 03 is an open circuit, and the loop resistance R approaches infinity, then a first feedback signal is generated and sent to the processor 014; when the earthing wire 02 of the power line 03 is connected, the power line 03 is a closed circuit, and the corresponding loop resistance R tends to a fixed value. Preferably, the loop resistance is less than 1000 Ω, then a corresponding second feedback signal is generated and sent to the processor 014.

[0068] As a preferred solution of this embodiment, an LED display module 018, a communication module 019, and an antenna 020 are further provided inside the coil clamp 01; the output end of the communication module 019 is connected to the antenna 020, and the input end of the communication module 019 is connected to the processor 014; the processor 014 is configured to send the generated first feedback signal or second feedback signal to the communication module 019; the LED display module 018 is configured to display the voltage set by the user, the data of the detected current, and the installation state of the earthing wire; the communication module 019 is configured to receive and send the first feedback signal or second feedback signal to the terminal device through the antenna 020; wherein, the terminal device includes a monitoring computer and a mobile terminal.

[0069] In this embodiment, the LED display module 018 is used to display the information of the device, including but not limited to the voltage set by the user, the data of the detected current, the installation state of the earthing wire, etc., and can also display the excitation voltage report when the device fails.

[0070] In this embodiment, the functions of the communication module 019 and the antenna 020 are to feedback the detected induced current, as well as the first feedback signal or the second feedback signal, to an external terminal device, so that the above data can be monitored and stored in real time through an external monitoring computer and / or mobile terminal, facilitating the user to inspect the power line 03, improving the timeliness of the earthing wire 02 detection, realizing the docking with the Internet of Things, and further realizing the remote online perception of the installation state of the earthing wire 02 of the power line 03.

[0071] Preferably, the communication module 019, the antenna 020, as well as the above-mentioned current sampling module 017 and power supply module 015, are all arranged inside the pliers arm at the hand-held part together with the processor 014. Further, in a preferred solution with a host, the communication module 019, the antenna 020, as well as the above-mentioned current sampling module 017 and power supply module 015 are all arranged in the host.

[0072] It is understandable that by monitoring the installation state of the grounding wire 02 of the power line 03 through the coil clamp 01, it is possible to avoid the occurrence of electric shock during the measurement process that may easily be caused by the oversight of the grounding wire 02 not being disconnected. At the same time, the coil clamp 01 can detect the grounding wire 02 of the power line 03 (electric tower) on the ground, without the need to climb the electric tower or disconnect and reconnect the line, and the grounding state can be directly detected.

[0073] Furthermore, it changes the previous measurement mode of using an insulation resistance tester to measure the insulation resistance of the line conductor, and innovatively adopts the measurement mode of the loop resistance between the line conductor, the grounding wire 02, and the ground by the coil clamp 01 to effectively and conveniently check whether the grounding wire 02 of the power line 03 is removed. At the same time, the voltage transformer coil 012 for exciting voltage and the current transformer coil 013 for measuring current are integrated into one or two clamps, minimizing the volume and weight of the device, which can be conveniently and quickly clamped onto the grounding downlead. At the same time, the grounding state can be detected without climbing or disconnecting and reconnecting the line, and in addition, it can effectively prevent the problem of electric shock caused by induced electricity during the measurement process.

[0074] Implementing the above embodiments has the following effects:

[0075] The technical solution of the present invention changes the existing measurement mode of using an insulation resistance tester to measure the insulation resistance of the line conductor, and uses the coil clamp 01 to detect the installation mode of the grounding wire 02 of the power line 03, so as to effectively and conveniently check whether the grounding wire 02 of the power line 03 is removed. There is no need to connect the insulation resistance tester to the power line 03, improving the perception timeliness and accuracy. It can be conveniently and quickly clamped onto the grounding wire 02 of the power line 03. At the same time, the grounding state can be detected without climbing the electric tower or disconnecting and reconnecting the insulation resistance tester, and it can effectively prevent the problem of electric shock caused by induced electricity during the measurement process.

[0076] Embodiment 2

[0077] Please refer to Figure 6 and 7, in this preferred embodiment, based on the coil clamp 01 described in Embodiment 1, an energy-taking coil 190 and an energy-taking control module 191 are further provided inside the jaws of the coil clamp 01; a first input end of the energy-taking control module 191 is connected to the processor 014, a second input end of the energy-taking control module 191 is connected to the energy-taking coil 190, and a conduction switch is provided between the energy-taking control module 191 and the energy-taking coil 190; the processor 014 is further configured to, in response to a user turning on the charging switch, generate and continuously send a charging control signal to the energy-taking control module 191; the energy-taking control module 191 is configured to receive the charging control signal and control the conduction switch to disconnect according to the charging control signal; the energy-taking coil 190 is configured to generate a corresponding induced current in response to the current conducted in the ground wire 02 and transmit the induced current to the energy-taking control module 191.

[0078] In this embodiment, please refer to Figure 7 , the jaws of the coil clamp 01 are divided into three layers, and each layer is separated by an insulating plate capable of achieving electromagnetic blocking. The voltage induction coil 012, the current induction coil 013, and the energy-taking coil 190 are respectively placed in the spaces of each layer, and the placement order among the voltage induction coil 012, the current induction coil 013, and the energy-taking coil 190 can be set according to the actual situation. Further, in another preferred embodiment with a host, the coil clamp 01 includes a first clamp, a second clamp, and a third clamp. The voltage induction coil 012 is placed in the first clamp, the current induction coil 013 is placed in the second clamp, the energy-taking coil 190 is placed in the third clamp, and the remaining modules are all arranged in the host, and the host is connected to the first clamp, the second clamp, and the third clamp; further, in order to reduce the number of clamping devices and also avoid the inconvenience of operation caused by the excessive weight of a single clamp, the voltage induction coil 012 is placed in the first clamp, the current induction coil 013 and the energy-taking coil 190 are placed in the second clamp, and an electromagnetic blocking insulating plate is provided in the second clamp to separate the current induction coil 013 and the energy-taking coil 190.

[0079] As a preferred solution of this embodiment, the processor 014 is further configured to, in response to a user turning off the charging switch, interrupt the generation of the charging control signal; the energy-taking control module 191 is further configured to, when the charging control signal is not received, control the conduction switch to close so that the induced current of the energy-taking coil 190 cannot be transmitted to the energy-taking control module 191.

[0080] In this embodiment, the energy extraction control module 191 receives the charging control signal sent by the processor 014 to control the conduction switch of the energy extraction coil 190, so as to turn on and off the charging process. When the energy extraction control module 191 fails to receive the charging control signal, it indicates that the user has turned off the corresponding charging switch, causing the processor 014 to interrupt the generation of the charging control signal. Therefore, the energy extraction control module 191 controls the closing of the conduction switch to ensure that the induced current generated in the energy extraction coil 190 cannot be transmitted to the energy extraction control module 191.

[0081] It should be noted that the execution conditions of the charging process include that the user turns on the charging switch and there is a conducting current in the grounding wire 02. The presence of a conducting current in the grounding wire 02 includes: the excitation voltage generated by the voltage induction coil 012 during the installation state detection process of the grounding wire 02, so that after the excitation voltage is injected into the grounding wire 02, a corresponding loop current is generated, and the loop current passes through the energy extraction coil 190 to generate an induced current for power recovery; it also includes: during the normal power transmission process of the power line 03, the grounding wire 02 is in a connected state, resulting in the grounding wire 02 being charged, so that there is a conducting current passing through the energy extraction coil 190 in the grounding wire 02, thereby generating an induced current for power acquisition.

[0082] It can be understood that since the grounding wire 02 in the power line 03 may conduct electricity through the power line 03 without being disconnected, during the normal power transmission process of the power line 03, the grounding wire 02 is in a conductive state. Therefore, when the grounding wire 02 is in a conductive state, in order to enable the coil clamp 01 to maintain a long-term detection operation state, the coil clamp 01 is charged through the energy extraction coil 190 to further ensure that the coil clamp 01 can operate stably, extend the working time of the coil clamp 01, and facilitate the user's operation experience.

[0083] As a preferred solution of this embodiment, please refer to Figure 6, a rectification module 192, a filtering module 193, an overvoltage protection module 194, an energy storage module 195, and a DC-DC converter 196 are further provided inside the coil clamp 01; the output end of the energy acquisition control module 191 is connected to the input end of the rectification module 192, the output end of the rectification module 192 is connected to the input end of the filtering module 193, the output end of the filtering module 193 is connected to the input end of the overvoltage protection module 194, the first output end of the overvoltage protection module 194 is connected to the input end of the energy storage module 195, the output end of the energy storage module 195 is connected to the input end of the DC-DC converter 196, and the first output end of the DC-DC converter 196 is connected to the processor 014; the energy acquisition control module 191 is further configured to transmit the induced current to the rectification module 192 to rectify, filter, and store the induced current; the DC-DC converter 196 is configured to transform the output voltage in the energy storage module 195 to provide a working voltage for the processor 014.

[0084] It should be noted that the energy acquisition control module 191 not only controls whether to conduct and access the induced current generated by the energy acquisition coil 190, but also is used to transmit the generated induced current to the rectification module 192 and the filtering module 193 to rectify and filter the current for energy storage charging, and finally input the charging current into the energy storage module 195 through the overvoltage protection module 194. The electric energy in the energy storage module 195 passes through the DC-DC converter 196 to provide a working voltage for the processor 014, and thus can provide a working voltage for the entire coil clamp 01.

[0085] As a preferred solution of this embodiment, the second output end of the overvoltage protection module 194 is connected to the communication module 019, and the second output end of the DC-DC converter 196 is connected to the communication module 019; the overvoltage protection module 194 is further configured to send the charging current information and charging voltage information input to the energy storage circuit to the communication module 019, so that the communication module 019 can send the charging voltage information and charging current information to the terminal device; the DC-DC converter 196 is further configured to provide a working voltage for the communication module 019.

[0086] In this embodiment, in order to enable the user to understand the charging situation in real time, the overvoltage protection module 194 can also send the charging information input to the energy storage module 195, including the charging current information and the charging voltage information, to the communication module 019, and then send it to the external monitoring computer and mobile terminal, optimizing the user experience.

[0087] Implementing the above embodiments has the following effects:

[0088] The technical solution of the present invention recovers or collects electric energy from the grounding wire in the power line through the energy-taking coil and the energy-taking control module, and then can charge the coil clamp, ensuring the working stability of the coil clamp, improving the working time of the coil clamp, realizing the passive detection of the grounding wire of the power line by the coil clamp, improving the convenience and effectiveness of the grounding wire detection, and prolonging the service life of the detection equipment.

[0089] The specific embodiments described above further elaborate on the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A detection system for the installation state of the grounding wire of a power line, characterized in that, Including: A coil clamp and a ground wire of a power line; A hollow hole is provided at the jaw of the coil clamp, and the ground wire is clamped in the hollow hole by the coil clamp; a voltage transformer coil, a current transformer coil and a processor are arranged inside the jaw of the coil clamp; The voltage transformer coil is used to generate an excitation voltage and inject the excitation voltage into the ground wire; the coil clamp is also provided with a power supply module and a voltage sampling module; the processor is used to generate a control signal corresponding to the voltage in response to the voltage set by the user and send the control signal to the power supply module; The power supply module is used to receive the control signal and generate an excitation current according to the control signal and the specification of the voltage transformer coil and input the excitation current into the voltage transformer coil, so that the voltage transformer coil generates an excitation voltage under the flow of the excitation current; The voltage sampling module is used to sample the excitation voltage output by the voltage module, so that the processor judges the sampled excitation voltage; when the excitation voltage is less than or greater than the voltage set by the user, an excitation voltage abnormal signal is generated, and the power supply module is enabled to sequentially increase the excitation voltage step by step according to a preset excitation voltage gradient table, so as to record the respectively generated excitation voltages and obtain and output an excitation voltage report; When the excitation voltage is equal to the voltage set by the user, an excitation voltage normal signal is generated; The current transformer coil is used to generate a detection current after injecting the excitation voltage into the ground wire and send the detection current to the processor; the coil clamp is also provided with a current sampling module; The current sampling module is used to sample the detection current generated by the current transformer coil and send the sampled detection current data to the processor, so that the processor judges the installation state of the ground wire according to the detection current data; The processor is used to judge the installation state of the ground wire of the power line according to the detection current; the installation state includes a disconnected state and a connected state.

2. The detection system for the installation state of the grounding wire of a power line according to claim 1, characterized in that The input end of the power supply module is connected to the processor, and the output end of the power supply module is connected to the input end of the voltage transformer coil.

3. The detection system for the installation state of the grounding wire of a power line according to claim 2, wherein The input end of the current sampling module is connected to the output end of the current transformer coil, and the output end of the current sampling module is connected to the processor.

4. The detection system for the installation state of the grounding wire of a power line according to claim 3, characterized in that, The processor is used to judge the installation state of the ground wire of the power line according to the detection current, specifically including: The processor calculates the loop resistance of the ground wire according to the voltage set by the user and the data of the detection current; If the value of the loop resistance tends to infinity, a first feedback signal indicating that the ground wire of the power line is in a disconnected state is generated; If the value of the loop resistance is a fixed value and less than a preset value, a second feedback signal indicating that the ground wire of the power line is in a connected state is generated.

5. The detection system for the installation state of the grounding wire of a power line according to claim 4, characterized in that, An LED display module, a communication module and an antenna are further arranged inside the coil clamp; the LED display module is connected to the processor, the output end of the communication module is connected to the antenna, and the input end of the communication module is connected to the processor; The processor is configured to send the generated first feedback signal or second feedback signal into the communication module; The LED display module is configured to display the voltage set by the user, the data of the detected current and the installation state of the ground wire; The communication module is configured to receive and send the first feedback signal or the second feedback signal to the terminal device through the antenna; wherein, the terminal device includes a monitoring computer and a mobile terminal.

6. The detection system for the installation state of the grounding wire of a power line according to claim 5, characterized in that, An energy harvesting coil and an energy harvesting control module are arranged inside the jaws of the coil clamp; the first input end of the energy harvesting control module is connected to the processor, the second input end of the energy harvesting control module is connected to the energy harvesting coil, and a conduction switch is arranged between the energy harvesting control module and the energy harvesting coil; The processor is further configured to generate and continuously send a charging control signal to the energy harvesting control module in response to the user turning on the charging switch; The energy harvesting control module is configured to receive the charging control signal and control the conduction switch to disconnect according to the charging control signal; The energy harvesting coil is configured to generate a corresponding induced current in response to the current conducted in the ground wire and transmit the induced current to the energy harvesting control module; 7. The detection system for the installation state of the grounding wire of a power line according to claim 6, characterized in that, A rectification module, a filtering module, an overvoltage protection module, an energy storage module and a DC-DC converter are further arranged inside the coil clamp; The output end of the energy harvesting control module is connected to the input end of the rectification module, the output end of the rectification module is connected to the input end of the filtering module, the output end of the filtering module is connected to the input end of the overvoltage protection module, the first output end of the overvoltage protection module is connected to the input end of the energy storage module, the output end of the energy storage module is connected to the input end of the DC-DC converter, and the first output end of the DC-DC converter is connected to the processor; The energy harvesting control module is further configured to transmit the induced current to the rectification module to rectify, filter and store the induced current; The DC-DC converter is configured to step down the output voltage of the energy storage module to provide a working voltage for the processor.

8. The detection system for the installation state of the grounding wire of a power line according to claim 7, characterized in that, The second output end of the overvoltage protection module is connected to the communication module, and the second output end of the DC-DC converter is connected to the communication module; The overvoltage protection module is further configured to send the charging current information and charging voltage information input to the energy storage module to the communication module, so that the communication module can send the charging voltage information and charging current information to the terminal device; The DC-DC converter is further configured to provide a working voltage for the communication module.

9. The detection system for the installation state of the grounding wire of a power line according to claim 6, wherein The processor is further configured to interrupt the generation of the charging control signal in response to the user turning off the charging switch; The energy acquisition control module is further configured to control the conduction switch to close when the charging control signal is not received, so that the induced current of the energy acquisition coil cannot be transmitted to the energy acquisition control module.

10. The detection system for the installation state of the grounding wire of a power line according to claim 1, characterized in that, The coil clamp includes a first clamp and a second clamp; The voltage transformer coil is arranged in the first clamp; The current transformer coil is arranged in the second clamp.

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