Overhead ground wire parallel gap regulation and control system and regulation and control method

Abstract

The embodiment of the invention discloses an overhead ground wire parallel gap regulation and control system and method, the regulation and control system comprises a parallel gap device, an arc light capturing module, a current monitoring module, a regulation module and a main control module, and the arc light capturing module is used for monitoring whether an arc appears at the parallel gap device; the current monitoring module is arranged on the grounding side of the parallel gap device and is used for monitoring whether current exists at the parallel gap device or not; the adjusting module is connected with the parallel gap device, the main control module is connected with the arc light capturing module, the current monitoring module and the adjusting module, and the main control module is used for controlling the adjusting module to adjust the gap size of the parallel gap device according to the monitoring result of the arc light capturing module and the monitoring result of the current monitoring module. According to the technical scheme provided by the embodiment of the invention, the size of the parallel gap can be regulated and controlled in real time, the safety of a power system is improved, an operator does not need to climb a tower repeatedly for inspection, and the regulation and control convenience is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of lightning protection for power transmission lines, and in particular to a parallel gap control system and control method for overhead ground wires. Background Art

[0002] The parallel gap of the overhead ground wire is a gap device installed between the overhead ground wire and the grounded part of the system. Its main function is to provide a safe discharge channel to protect the overhead ground wire and related equipment when the overhead ground wire is subjected to overvoltage such as lightning strike.

[0003] However, due to mechanical vibration or natural environmental influences, the parallel gap may change, which may result in the size of the parallel gap being unsuitable for the electromagnetic induction and electrostatic induction voltages on the overhead ground wire of the transmission line at a certain moment, ultimately making it impossible for the parallel gap arc to be extinguished as soon as possible or increasing the energy consumption of the transmission line due to the increase in voltage during normal operation.

[0004] In order to ensure that the ground wire discharge gap meets the requirements of regulations and specifications, operators need to repeatedly climb the tower to check and adjust the ground wire discharge gap every year. High-frequency tower climbing and high-altitude operations greatly increase the probability of operating risks such as personal injury and death. In addition, even if personnel climb the tower to make adjustments, the discharge gap cannot cope well with temporary changes in induced voltage or lightning current, and long-term ablation or lightning current cannot be discharged often occurs, which damages the power system equipment to a certain extent and affects the safety of the power system. Summary of the invention

[0005] The embodiments of the present invention provide an overhead ground wire parallel gap control system and control method to achieve adaptive control of the size of the parallel gap.

[0006] According to one aspect of the present invention, there is provided an overhead ground wire parallel gap control system, comprising: a parallel gap device, an arc light capture module, a current monitoring module, a regulating module and a main control module;

[0007] The parallel gap device is connected in parallel with the insulator, one side of the insulator is the overhead ground wire side, and the other side of the insulator is the grounding side of the parallel gap device;

[0008] The arc light capturing module is arranged at the parallel gap device, and the arc light capturing module is used to monitor whether an arc occurs at the parallel gap device;

[0009] The current monitoring module is arranged at the grounding side of the parallel gap device, and the current monitoring module is used to monitor whether there is current at the parallel gap device;

[0010] The adjustment module is connected to the parallel gap device, and the main control module is respectively connected to the arc capture module, the current monitoring module and the adjustment module. The main control module is used to control the adjustment module to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module and the monitoring results of the current monitoring module.

[0011] Optionally, the parallel gap device comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged on both sides of the insulator, the first electrode is connected to the overhead ground wire, and the second electrode is grounded;

[0012] The current monitoring module and the arc light capturing module are both located on the second electrode.

[0013] Optionally, the adjustment module includes a rotatable device, which is fixedly connected to the moving contact end of the first electrode or the second electrode, and is used to drive the moving contact end of the first electrode or the second electrode to rotate in response to a control signal output by the main control module.

[0014] Optionally, it also includes a voltage monitoring module, which is arranged on the overhead ground wire side, and is used to measure the induced voltage on the overhead ground wire at the parallel gap device. The main control module is also used to control the adjustment module to adjust the gap size of the parallel gap device according to the induced voltage on the overhead ground wire and the monitoring result of the arc capture module.

[0015] According to another aspect of the present invention, there is provided an overhead ground wire parallel gap control method, which is performed by an overhead ground wire parallel gap control system, wherein the overhead ground wire parallel gap control system comprises a parallel gap device, an arc light capture module, a current monitoring module, a regulating module and a main control module, wherein the parallel gap device is connected in parallel with an insulator, one side of the insulator is the overhead ground wire side, and the other side of the insulator is the grounding side of the parallel gap device;

[0016] The overhead ground wire parallel gap control method comprises:

[0017] Monitoring whether an arc occurs at the parallel gap device by the arc capture module, and monitoring whether a current exists at the parallel gap device by the current monitoring module;

[0018] The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring result of the arc capture module and the monitoring result of the current monitoring module.

[0019] Optionally, the main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring result of the arc capture module and the monitoring result of the current monitoring module, including:

[0020] When it is detected that there is current at the parallel gap device, determining whether an arc occurs at the parallel gap device;

[0021] When an electric arc occurs, controlling the regulating module to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics;

[0022] If the arcing characteristics meet the preset characteristics, controlling the adjustment module to increase the gap of the parallel gap device;

[0023] If the arcing characteristic does not meet the preset characteristic, the adjustment module is controlled not to adjust the gap of the parallel gap device.

[0024] Optionally, the arcing characteristics include arcing frequency and arcing time;

[0025] The step of controlling the adjustment module to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics comprises:

[0026] If the arcing frequency of the electric arc reaches a preset frequency, controlling the regulating module to increase the gap of the parallel gap device;

[0027] If the arcing frequency of the electric arc does not reach the preset frequency, controlling the adjustment module not to adjust the gap of the parallel gap device;

[0028] The step of controlling the adjustment module to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics also includes:

[0029] If the arcing time of the electric arc is greater than a second preset time, controlling the regulating module to increase the gap of the parallel gap device;

[0030] If the arcing time of the electric arc is less than or equal to the second preset time, the regulating module is controlled not to adjust the gap of the parallel gap device.

[0031] Optionally, the overhead ground wire parallel gap control method further includes:

[0032] After increasing the gap of the parallel gap device, when the arc is extinguished, the regulating module is controlled to restore the gap of the parallel gap device.

[0033] Optionally, when no arc occurs, the regulating module is controlled to adjust the gap of the parallel gap device according to whether the current duration at the parallel gap device is greater than or equal to a first preset time;

[0034] If the duration of the current at the parallel gap device is greater than or equal to a first preset time, controlling the adjustment module to increase the gap of the parallel gap device;

[0035] If the duration of the current at the parallel gap device is less than the first preset time, the adjustment module is controlled not to adjust the gap of the parallel gap device.

[0036] Optionally, the overhead ground wire parallel gap control system further includes a voltage monitoring module, and the voltage monitoring module is arranged on the overhead ground wire side;

[0037] The overhead ground wire parallel gap control method further includes:

[0038] monitoring the induced voltage on the overhead ground wire at the parallel gap device by the voltage monitoring module;

[0039] The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the induced voltage and the monitoring result of the arc light capture module;

[0040] The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the induced voltage and the monitoring result of the arc capture module, including:

[0041] If the induced voltage increases to be greater than the preset voltage and arcing does not occur at the parallel gap device, the regulating module is controlled to reduce the gap of the parallel gap device until arcing occurs at the parallel gap device.

[0042] The technical solution provided by the embodiment of the present invention monitors whether an arc occurs at the parallel gap device through an arc capture module, and monitors whether there is current at the parallel gap device through a current monitoring module. The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module and the monitoring results of the current monitoring module. Compared with the prior art, the technical solution provided by this embodiment can achieve real-time regulation of the size of the parallel gap, which is beneficial to improving the safety of the power system, and does not require operators to repeatedly climb the tower for inspection, which is beneficial to improving the convenience of regulation. In addition, comprehensive judgment is made on the current and arc at the parallel gap, which is beneficial to reducing the malfunction of the adjustment module and ensuring the safe and stable operation of the power system.

[0043] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 A schematic diagram of the structure of an overhead ground wire parallel gap control system provided by an embodiment of the present invention;

[0046] Figure 2 A schematic structural diagram of another overhead ground wire parallel gap control system provided by an embodiment of the present invention;

[0047] Figure 3 A flow chart of a method for controlling the parallel gap of overhead ground wires provided by an embodiment of the present invention;

[0048] Figure 4 A flow chart of another overhead ground wire parallel gap control method provided by an embodiment of the present invention;

[0049] Figure 5 A flow chart of another overhead ground wire parallel gap control method provided by an embodiment of the present invention;

[0050] Figure 6 A flow chart of another overhead ground wire parallel gap control method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] Figure 1 A schematic diagram of a parallel gap control system for overhead ground wires provided in an embodiment of the present invention, referring to Figure 1 The overhead ground wire parallel gap control system provided in this embodiment includes: a parallel gap device, an arc capture module 10, a current monitoring module 20, an adjustment module 30 and a main control module 40; the parallel gap device is connected in parallel with the insulator 100, one side of the insulator 100 is the overhead ground wire 200 side, and the other side of the insulator 100 is the grounding side of the parallel gap device; the arc capture module 10 is arranged at the parallel gap device, and the arc capture module 10 is used to monitor whether an arc occurs at the parallel gap device; the current monitoring module 20 is arranged at the grounding side of the parallel gap device, and the current monitoring module 20 is used to monitor whether there is current at the parallel gap device; the adjustment module 30 is connected to the parallel gap device, and the main control module 40 is respectively connected to the arc capture module 10, the current monitoring module 20 and the adjustment module 30, and the main control module 40 is used to control the adjustment module 30 to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module 10 and the monitoring results of the current monitoring module 20.

[0054] Specifically, the parallel gap device is usually composed of two electrodes, for example, the parallel gap device includes a first electrode 11 and a second electrode 12, and a certain gap distance is maintained between the first electrode 11 and the second electrode 12. Under normal operation, the parallel gap of the overhead ground wire 200 is in a non-conductive state, which has no effect on the operation of the line. When the overhead ground wire 200 is struck by lightning, the lightning overvoltage will cause the parallel gap to be broken down, and the lightning current will be discharged to the ground through the parallel gap, thereby preventing the overhead ground wire from being damaged due to excessive lightning current, while protecting the safety of the insulator 100.

[0055] When the parallel gap is broken down, air molecules will be ionized to generate plasma, thereby triggering the arc burning process. The smaller the gap of the parallel gap, the easier it is for arc burning to occur. The arc at the parallel gap can be captured by the arc capture module 10 to monitor whether continuous arc burning occurs at the parallel gap.

[0056] The current monitoring module 20 is used to monitor whether there is current in the parallel gap. When current flows through the parallel gap, the main control module 40 can judge that the parallel gap is discharged by the overhead ground wire system, and control the adjustment module 30 to dynamically adjust the gap size of the parallel gap in combination with whether arcing occurs in the parallel gap to prevent system malfunction. For example, when the current monitoring module 20 detects that there is current in the parallel gap, and the arc capture module 10 detects that arcing occurs in the parallel gap, in order to reduce the arc erosion of the parallel gap, the adjustment module 30 can be controlled to increase the parallel gap so that the arcing is quickly extinguished.

[0057] The technical solution provided by the embodiment of the present invention monitors whether an arc occurs at the parallel gap device through the arc capture module 10, and monitors whether there is current at the parallel gap device through the current monitoring module 20. The main control module 40 controls the adjustment module 30 to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module 10 and the monitoring results of the current monitoring module 20. Compared with the prior art, the technical solution provided by this embodiment can realize real-time regulation of the size of the parallel gap, which is beneficial to improving the safety of the power system, and does not require operators to repeatedly climb the tower for inspection, which is beneficial to improving the convenience of regulation. In addition, comprehensive judgment is made on the current and arc at the parallel gap, which is beneficial to reducing the malfunction of the adjustment module 30 and ensuring the safe and stable operation of the power system.

[0058] Continue to refer Figure 1 Optionally, the first electrode 11 and the second electrode 12 are respectively located on both sides of the insulator 100, the first electrode 11 is connected to the overhead ground wire 200, and the second electrode 12 is grounded. The static contact end of the first electrode 11 and / or the second electrode 12 may be in a straight line shape, and the moving contact end may be in a ram-horn shape to form an arc striking angle. The arc striking angle can guide the arc to move upward, so that the arc is away from the insulator 100, which is conducive to protecting the insulator 100 from damage by the arc.

[0059] Optionally, the current monitoring module 20 can be arranged on the second electrode 12 to ensure that the current monitoring module 20 can monitor the current at the parallel gap. The arc capture module 10 can be arranged on the second electrode 12 to facilitate monitoring the arcing at the parallel gap. The arc capture module 10 can be an arc monitor that can detect light signals, current signals or other related physical quantities during arcing.

[0060] Optionally, the adjustment module 30 includes a rotatable device, which is fixedly connected to the moving contact end of the first electrode 11 or the second electrode 12, and is used to drive the moving contact end of the first electrode 11 or the second electrode 12 to rotate in response to a control signal output by the main control module 40.

[0061] Specifically, taking the fixed connection between the rotatable device and the moving contact end of the second electrode 12 as an example, the rotatable device may include a unilateral adjustable angle bracket and a motor, the unilateral adjustable angle bracket is fixedly connected to the moving contact end of the second electrode 12, the motor is connected to the unilateral adjustable angle bracket, and a control signal is sent to the motor through the main control module 40. The motor drives the unilateral adjustable angle bracket to rotate in response to the received control signal, thereby driving the moving contact end of the second electrode 12 to rotate, so that the moving contact end of the second electrode 12 is away from or close to the first electrode 11, thereby adjusting the size of the parallel gap.

[0062] Figure 2 A schematic diagram of another overhead ground wire parallel gap control system provided by an embodiment of the present invention, referring to Figure 2 On the basis of the above-mentioned embodiments, optionally, the overhead ground wire parallel gap control system provided in the present embodiment also includes a voltage monitoring module 50, which is arranged on the side of the overhead ground wire 200. The voltage monitoring module 50 is used to measure the induced voltage on the overhead ground wire 200 at the parallel gap device. The main control module 40 is also used to control the adjustment module 30 to adjust the gap size of the parallel gap device according to the induced voltage on the overhead ground wire 200 and the monitoring result of the arc capture module 10.

[0063] Specifically, the floating potential (i.e., the induced voltage) of the overhead ground wire 200 is monitored by the voltage monitoring module 50. When the induced voltage of the overhead ground wire 200 continues to rise and is higher than the specified value or the preset value, and no arc appears at the parallel gap at this time, it indicates that the gap is too large. The main control module 40 sends a control signal to the adjustment module 30 to control the adjustment module 30 to reduce the parallel gap so that the parallel gap can be discharged in time to ensure the safety of the overhead ground wire 200 and the insulator 100.

[0064] The technical solution provided by the embodiment of the present invention can adaptively adjust the size of the parallel gap, and by real-time monitoring the arc and current of the parallel gap, when it is detected that current flows through the parallel gap, the parallel gap is appropriately increased in combination with the arc burning situation to ensure that the arc burning can be quickly extinguished. By real-time monitoring the induced voltage at the overhead ground wire 200, when it is detected that the induced voltage at the overhead ground wire 200 continues to rise and exceeds the preset voltage value, if there is no arc burning phenomenon at the parallel gap, the parallel gap can be reduced to ensure that the parallel gap can be arced, so that the parallel gap can discharge and discharge, thereby improving the safety of the power system.

[0065] Optionally, the main control module 40 may include a signal processor (analysis system) and a signal output unit. The signal processor may be used to analyze the monitoring results of the arc capture module 10, the current monitoring module 20 and the voltage monitoring module 50, and generate corresponding control signals, which are transmitted to the adjustment module 30 via the signal output unit, thereby controlling the adjustment module 30 to drive the electrodes of the parallel gap device to rotate.

[0066] Optionally, the adjustment module 30 can rotate 360° to flexibly adjust the size of the parallel gap.

[0067] Optionally, an embodiment of the present invention further provides an overhead ground wire parallel gap control method, which can be executed by the overhead ground wire parallel gap control system provided by any embodiment of the present invention. Figure 3 A flow chart of a method for controlling the parallel gap of an overhead ground wire provided in an embodiment of the present invention, referring to Figure 1 and Figure 3 The overhead ground wire parallel gap control method provided in this embodiment includes:

[0068] S110, monitoring whether an arc occurs at the parallel gap device through an arc capture module, and monitoring whether there is current at the parallel gap device through a current monitoring module.

[0069] S120, the main control module controls the regulating module to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module and the monitoring results of the current monitoring module.

[0070] The technical solution provided by the embodiment of the present invention monitors whether an arc occurs at the parallel gap device through the arc capture module 10, and monitors whether there is current at the parallel gap device through the current monitoring module 20. The main control module 40 controls the adjustment module 30 to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module 10 and the monitoring results of the current monitoring module 20. Compared with the prior art, the technical solution provided by this embodiment can realize real-time regulation of the size of the parallel gap, which is beneficial to improving the safety of the power system, and does not require operators to repeatedly climb the tower for inspection, which is beneficial to improving the convenience of regulation. In addition, comprehensive judgment is made on the current and arc at the parallel gap, which is beneficial to reducing the malfunction of the adjustment module 30 and ensuring the safe and stable operation of the power system.

[0071] Figure 4 A flowchart of another overhead ground wire parallel gap control method provided by an embodiment of the present invention, referring to Figure 4 Based on the above embodiment, optionally, the overhead ground wire parallel gap control method provided in this embodiment includes:

[0072] S110, monitoring whether an arc occurs at the parallel gap device through an arc capture module, and monitoring whether there is current at the parallel gap device through a current monitoring module.

[0073] S1201. When current is detected at the parallel gap device, determine whether an arc occurs at the parallel gap device.

[0074] S1202: When an electric arc occurs, the regulating module is controlled to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics.

[0075] S1203: If the arcing characteristics meet the preset characteristics, the control and adjustment module increases the gap of the parallel gap device.

[0076] S1204: If the arcing characteristics do not meet the preset characteristics, the control and adjustment module does not adjust the gap of the parallel gap device.

[0077] The arcing characteristics include arcing frequency and arcing time. S1203 specifically includes:

[0078] If the arcing frequency of the electric arc reaches the preset frequency, the control and regulation module 30 increases the gap of the parallel gap device.

[0079] If the arc burning time of the electric arc is greater than the second preset time, the control and adjustment module 30 increases the gap of the parallel gap device.

[0080] Optionally, the overhead ground wire parallel gap control method further includes: after increasing the gap of the parallel gap device, when the arc is extinguished, the control adjustment module 30 restores the gap of the parallel gap device, that is, restores the gap of the parallel gap device to an initial state before adjustment.

[0081] S1205: When no arc occurs, controlling the regulating module to adjust the gap of the parallel gap device according to whether the current duration at the parallel gap device is greater than or equal to a first preset time.

[0082] S1206: If the duration of the current at the parallel gap device is greater than or equal to the first preset time, the control adjustment module increases the gap of the parallel gap device.

[0083] S1207: If the duration of the current at the parallel gap device is less than the first preset time, the control and adjustment module does not adjust the gap of the parallel gap device.

[0084] Figure 5 A flowchart of another overhead ground wire parallel gap control method provided by an embodiment of the present invention, referring to Figure 2 and Figure 5 The overhead ground wire parallel gap control method provided in this embodiment includes:

[0085] S210. Monitor the induced voltage on the overhead ground wire at the parallel gap device through a voltage monitoring module.

[0086] S220, the main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring results of the induced voltage and the arc capture module.

[0087] Among them, S220 specifically includes:

[0088] If the induced voltage increases to be greater than the preset voltage and arcing does not occur at the parallel gap device, the control and regulation module reduces the gap of the parallel gap device until arcing occurs at the parallel gap device.

[0089] Figure 6 A flowchart of another overhead ground wire parallel gap control method provided by an embodiment of the present invention, combined with Figure 2-Figure 6 The overhead ground wire parallel gap control method provided in this embodiment is as follows:

[0090] The first step is to install the parallel gap device. The parallel gap device is installed in a tension section. A tension section may include multiple base towers. The specific installation position can be installed from the next base tower of the direct grounding point of the overhead ground wire 200 to ensure that the parallel gap is installed in the entire section of the overhead ground wire 200.

[0091] Then, an arc capture module 10 , a current monitoring module 20 , a regulating module 30 , a main control module 40 and a voltage monitoring module 50 are installed at corresponding positions to monitor the current and arc at the parallel gap and detect the induced voltage of the overhead ground wire 200 .

[0092] Afterwards, the main control module 40 analyzes the monitoring results of the arc light capture module 10, the current monitoring module 20 and the voltage monitoring module 50. The main control module 40 makes arcing judgments based on the monitored current and arc, and records each arcing time and the arcing frequency of each parallel gap device during arcing.

[0093] Specifically, when it is detected that there is current at the parallel gap device, when arcing occurs in the parallel gap, it is determined whether to adjust the parallel gap according to whether the arcing meets the preset characteristics. For example, when the arcing frequency is too high and reaches 5min / time, the parallel gap can be increased to reduce the arcing frequency so that the arcing can be extinguished quickly. When the arcing frequency does not reach 5min / time, the original parallel gap can be kept unchanged. Alternatively, when the single arcing time is greater than 2s (the second preset time), the parallel gap is increased to quickly extinguish the arc; when the single arcing time is not greater than 2s, the original parallel gap can be kept unchanged. Alternatively, if the current monitoring module 20 can monitor the current for a long time (such as 5s) (that is, the current duration is greater than or equal to the first preset time), but the arc capture module 10 does not monitor the arc, it can be determined that the parallel gap at this time is too small, causing the segmented insulation to fail, and both sides of the overhead ground wire 200 have been grounded to form an induced current, so the parallel gap needs to be increased. Otherwise, the original parallel gap is kept unchanged.

[0094] After the parallel gap is increased, the analysis can continue based on the monitored current and arc. If the arcing characteristics still do not meet the preset characteristics, the parallel gap can be further increased to achieve dynamic adjustment of the parallel gap.

[0095] After the parallel gap increases and the arc is extinguished, the main control module 40 controls the adjustment module 30 to restore the parallel gap to the initialization distance before adjustment.

[0096] The above method controls the parallel gap to increase or remain unchanged according to the current and arcing conditions at the parallel gap, so as to quickly extinguish the arc when the gap discharges and reduce the arc erosion of the parallel gap.

[0097] Of course, the parallel gap can also be reduced according to the floating potential and arcing of the overhead ground wire 200. When the voltage monitoring module 50 detects that the induced voltage on the overhead ground wire at the parallel gap device continues to rise and is greater than the preset voltage, if there is no arcing at the parallel gap, the main control module 40 can control the adjustment module 30 to reduce the parallel gap until arcing occurs, so that the parallel gap can discharge and leak current to ensure the safety of the power system. Otherwise, the original parallel gap is kept unchanged and the parallel gap can discharge normally.

[0098] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0099] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An overhead ground wire parallel gap control system, characterized in that: include: Parallel gap device, arc capture module, current monitoring module, regulation module and main control module; The parallel gap device is connected in parallel with the insulator, one side of the insulator is the overhead ground wire side, and the other side of the insulator is the grounding side of the parallel gap device; The arc light capturing module is arranged at the parallel gap device, and the arc light capturing module is used to monitor whether an arc occurs at the parallel gap device; The current monitoring module is arranged at the grounding side of the parallel gap device, and the current monitoring module is used to monitor whether there is current at the parallel gap device; The adjustment module is connected to the parallel gap device, and the main control module is respectively connected to the arc capture module, the current monitoring module and the adjustment module. The main control module is used to control the adjustment module to adjust the gap size of the parallel gap device according to the monitoring results of the arc capture module and the monitoring results of the current monitoring module.

2. The overhead ground wire parallel gap control system according to claim 1, characterized in that: The parallel gap device comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged on both sides of the insulator, the first electrode is connected to the overhead ground wire, and the second electrode is grounded; The current monitoring module and the arc light capturing module are both located on the second electrode.

3. The overhead ground wire parallel gap control system according to claim 2, characterized in that: The adjustment module includes a rotatable device, which is fixedly connected to the moving contact end of the first electrode or the second electrode, and is used to drive the moving contact end of the first electrode or the second electrode to rotate in response to a control signal output by the main control module.

4. The overhead ground wire parallel gap control system according to claim 1, characterized in that: It also includes a voltage monitoring module, which is arranged on the side of the overhead ground wire. The voltage monitoring module is used to measure the induced voltage on the overhead ground wire at the parallel gap device. The main control module is also used to control the adjustment module to adjust the gap size of the parallel gap device according to the induced voltage on the overhead ground wire and the monitoring result of the arc capture module.

5. A method for controlling the parallel gap of overhead ground wires, characterized in that: The control system is executed by an overhead ground wire parallel gap control system, which includes a parallel gap device, an arc capture module, a current monitoring module, a regulating module and a main control module. The parallel gap device is connected in parallel with an insulator, one side of the insulator is the overhead ground wire side, and the other side of the insulator is the grounding side of the parallel gap device. The overhead ground wire parallel gap control method comprises: Monitoring whether an arc occurs at the parallel gap device by the arc capture module, and monitoring whether a current exists at the parallel gap device by the current monitoring module; The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring result of the arc capture module and the monitoring result of the current monitoring module.

6. The method for controlling the parallel gap of overhead ground wires according to claim 5, characterized in that: The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring result of the arc capture module and the monitoring result of the current monitoring module, including: When it is detected that there is current at the parallel gap device, determining whether an arc occurs at the parallel gap device; When an electric arc occurs, controlling the regulating module to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics; If the arcing characteristics meet the preset characteristics, controlling the adjustment module to increase the gap of the parallel gap device; If the arcing characteristic does not meet the preset characteristic, the adjustment module is controlled not to adjust the gap of the parallel gap device.

7. The method for controlling the parallel gap of overhead ground wires according to claim 6, characterized in that: The arcing characteristics include arcing frequency and arcing time; The step of controlling the adjustment module to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics comprises: If the arcing frequency of the electric arc reaches a preset frequency, controlling the regulating module to increase the gap of the parallel gap device; If the arcing frequency of the electric arc does not reach the preset frequency, controlling the adjustment module not to adjust the gap of the parallel gap device; The step of controlling the adjustment module to adjust the gap of the parallel gap device according to whether the arc burning characteristics of the electric arc meet the preset characteristics also includes: If the arcing time of the electric arc is greater than a second preset time, controlling the regulating module to increase the gap of the parallel gap device; If the arcing time of the electric arc is less than or equal to the second preset time, the regulating module is controlled not to adjust the gap of the parallel gap device.

8. The method for controlling the parallel gap of overhead ground wires according to claim 6, characterized in that: The overhead ground wire parallel gap control method further includes: After increasing the gap of the parallel gap device, when the arc is extinguished, the regulating module is controlled to restore the gap of the parallel gap device.

9. The method for controlling the parallel gap of overhead ground wires according to claim 6, characterized in that: The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the monitoring result of the arc capture module and the monitoring result of the current monitoring module, and further includes: When no arc occurs, controlling the adjustment module to adjust the gap of the parallel gap device according to whether the current duration at the parallel gap device is greater than or equal to a first preset time; If the duration of the current at the parallel gap device is greater than or equal to a first preset time, controlling the adjustment module to increase the gap of the parallel gap device; If the duration of the current at the parallel gap device is less than the first preset time, the adjustment module is controlled not to adjust the gap of the parallel gap device.

10. The method for controlling the gap of overhead ground wires in parallel according to claim 5, characterized in that: The overhead ground wire parallel gap control system further includes a voltage monitoring module, which is arranged on the overhead ground wire side; The overhead ground wire parallel gap control method further includes: monitoring the induced voltage on the overhead ground wire at the parallel gap device by the voltage monitoring module; The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the induced voltage and the monitoring result of the arc light capture module; The main control module controls the adjustment module to adjust the gap size of the parallel gap device according to the induced voltage and the monitoring result of the arc capture module, including: If the induced voltage increases to be greater than the preset voltage and arcing does not occur at the parallel gap device, the regulating module is controlled to reduce the gap of the parallel gap device until arcing occurs at the parallel gap device.

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