Distribution network ice melting intelligent short circuit switch, control method and system

Abstract

The invention relates to a distribution network ice melting intelligent short circuit switch and a control method and system.The distribution network ice melting intelligent short circuit switch comprises a control device, a detection device and a switching device, the detection device is connected with a three-phase input end and the control device, the control device is connected with the switching device, and the switching device is connected with a three-phase copper bar; the detection device is used for detecting input voltage of the three-phase input end and sending the input voltage to the control device; and the control device is used for receiving the trigger instruction and controlling the switching device to execute preset operation according to the trigger instruction and the input voltage so as to control whether the three-phase copper bar is short-circuited or not. Through the technical scheme disclosed by the invention, intelligent remote short circuit at the tail end of the line during ice melting is realized, the safety and reliability of ice melting operation are improved, and the mistaken touch risk of irrelevant personnel can be effectively reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical engineering, and in particular, to a smart short-circuit switch for distribution network ice melting, a control method, and a system. Background Art

[0002] With the continuous development of the economy, the requirements for the power supply reliability of distribution lines are also getting higher and higher. In recent years, the global climate has become increasingly harsh, extreme weather occurs frequently in winter, and the scope of line icing is getting larger and larger. And line ice melting is an effective means to solve the problem of distribution line icing.

[0003] To form an ice melting circuit for line ice melting, it is necessary to short-circuit the three phases at the end of the iced line. Currently, the short-circuit methods used for distribution network line ice melting are all manual pole climbing, using quick connection clamps or T-shaped clamps for short-circuiting. When the line is iced in winter, the roads leading to the vicinity of the line will inevitably be iced synchronously, resulting in great potential safety hazards for the operators during the process of going to the operation site. At this time, it is particularly difficult for personnel to go to the end of the line to carry out the three-phase short-circuit work. Moreover, in winter, the surface of the electric pole will also be iced. The icing of the pole in winter makes it difficult for personnel to climb the pole. When using foot pedals to climb the pole, the friction is small, and there is a risk of personnel falling from the pole; if using ice-breaking tools to break the ice and then climb the pole, it will consume a great deal of manpower and material resources. In addition, manual short-circuiting is very time-consuming, which will increase the power outage time of the line, reduce the line reliability, and affect the work efficiency. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a smart short-circuit switch for distribution network ice melting, a control method, and a system, which realize intelligent remote short-circuiting at the end of the line during ice melting, improve the safety and reliability of ice melting operations, and can effectively reduce the risk of accidental contact by irrelevant personnel.

[0005] In a first aspect, the present disclosure provides a smart short-circuit switch for distribution network ice melting, including:

[0006] A control device, a detection device, and a switch device. The detection device is respectively connected to the three-phase input terminal and the control device, the control device is connected to the switch device, and the switch device is connected to the three-phase copper bar.

[0007] The detection device is configured to detect the input voltage of the three-phase input terminal and send it to the control device.

[0008] The communication unit is connected to the switch control unit, and the switch control unit is connected to the detection device.

[0009] The communication unit is configured to receive a trigger instruction and send the trigger instruction to the switch control unit. The switch control unit is configured to control the switch device to perform a preset operation according to the trigger instruction and the input voltage, so as to control whether the three-phase copper bus is short-circuited.

[0010] Optionally, the control device is configured to receive a closing trigger instruction, and send a closing action instruction to the switch device according to the closing trigger instruction and the input voltage being less than a preset voltage threshold, to control the switch device to perform a closing operation, so as to short-circuit the three-phase copper bus.

[0011] Optionally, the control device is configured to receive a tripping trigger instruction, and send a tripping action instruction to the switch device according to the tripping trigger instruction, to control the switch device to perform a tripping operation, so as to disconnect the short circuit of the three-phase copper bus.

[0012] Optionally, the intelligent short-circuit switch for distribution network ice melting further includes: an anti-misoperation device, which is respectively connected to the control device, the detection device and the switch device;

[0013] The anti-misoperation device controls the on / off of the control device and the switch device according to the input voltage.

[0014] Optionally, the anti-misoperation device includes: a comparison unit, a relay and a switch unit;

[0015] The negative electrode of the comparison unit is connected to the detection device, the positive electrode of the comparison unit is connected to a reference voltage, the output end of the comparison unit is connected to the control end of the switch unit, the first end of the switch unit is connected to the first end of the relay, the second end of the switch unit is grounded, and the second end of the relay is connected to the switch device.

[0016] Optionally, the control device includes a communication unit and a switch control unit. The communication unit is connected to the switch control unit, and the switch control unit is connected to the detection device;

[0017] The communication unit is configured to receive a trigger instruction and send the trigger instruction to the switch control unit. The switch control unit is configured to control the switch device to perform a preset operation according to the trigger instruction and the input voltage, so as to control whether the three-phase copper bus is short-circuited.

[0018] Optionally, the intelligent short-circuit switch for distribution network ice melting further includes: an incoming line bushing and a box body. The box body is connected to the distribution network line through the incoming line bushing, and the control device, the detection device, the switch device and the three-phase copper bus are accommodated in the box body.

[0019] In a second aspect, the present disclosure also provides a control method for a distribution network ice melting intelligent short - circuit switch, which is applicable to the distribution network ice melting intelligent short - circuit switch as described in the first aspect; the control method includes:

[0020] Obtain a trigger instruction and the input voltage of the three - phase input terminal;

[0021] Control the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three - phase copper bars are short - circuited.

[0022] Optionally, the trigger instruction is a closing trigger instruction;

[0023] The step of controlling the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three - phase copper bars are short - circuited includes:

[0024] According to the closing trigger instruction and the input voltage being less than a preset voltage threshold, control the switch device to perform a closing operation to short - circuit the three - phase copper bars.

[0025] Optionally, the trigger instruction is a tripping trigger instruction;

[0026] The step of controlling the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three - phase copper bars are short - circuited includes:

[0027] According to the tripping trigger instruction, control the switch device to perform a tripping operation to control the three - phase copper bars to disconnect the short - circuit.

[0028] Optionally, after controlling the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three - phase copper bars are short - circuited, it further includes:

[0029] Continuously detect the telemetry signal.

[0030] In a third aspect, the present disclosure also provides a distribution network ice melting intelligent short - circuit switch system, including the distribution network ice melting intelligent short - circuit switch as described in the first aspect; it further includes:

[0031] A support platform, a diagonal brace, and a hoop;

[0032] The distribution network ice melting intelligent short - circuit switch is fixed on the support platform, the support platform is connected to the hoop through the diagonal brace, and the hoop surrounds the installation rod.

[0033] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0034] The embodiments of the present disclosure provide a smart short - circuit switch for distribution network ice melting, a control method and a system. The smart short - circuit switch for distribution network ice melting includes: a control device, a detection device, and a switch device. The detection device is respectively connected to the three - phase input terminal and the control device, the control device is connected to the switch device, and the switch device is connected to the three - phase copper bar. The detection device is used to detect the input voltage of the three - phase input terminal and send it to the control device; the control device is used to receive a trigger instruction, and control the switch device to perform a preset operation according to the trigger instruction and the input voltage, so as to control whether the three - phase copper bar is short - circuited. Thereby, the ice - melting preparation time is reduced, the power supply reliability of the line is improved, intelligent remote short - circuiting at the end of the line during ice melting can be realized, there is no need for personnel to carry out pole - climbing operations, and the three - phase short - circuiting of the line can be achieved with one - key remote control, improving the safety and reliability of the ice - melting operation and effectively reducing the risk of accidental contact by irrelevant personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0036] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic structural diagram of a smart short - circuit switch for distribution network ice melting provided by the embodiments of the present disclosure;

[0038] Figure 2 It is a schematic structural diagram of a smart short - circuit switch for distribution network ice melting provided by the embodiments of the present disclosure;

[0039] Figure 3 It is a schematic structural diagram of an anti - accidental - contact device provided by the embodiments of the present disclosure;

[0040] Figure 4 It is a schematic cross - sectional structural diagram of a smart short - circuit switch for distribution network ice melting provided by the embodiments of the present disclosure;

[0041] Figure 5 It is a schematic diagram of the conductive circuit of a smart short - circuit switch for distribution network ice melting provided by the embodiments of the present disclosure;

[0042] Figure 6 It is a schematic flow diagram of a control method for a smart short - circuit switch for distribution network ice melting provided by the embodiments of the present disclosure;

[0043] Figure 7 It is a specific flow diagram of a control method for a smart short - circuit switch for distribution network ice melting provided by the embodiments of the present disclosure;

[0044] Figure 8 This is a schematic structural diagram of a distribution network ice melting intelligent short - circuit switch system provided by an embodiment of the present disclosure.

[0045] Among them, 1. Control device; 2. Detection device; 3. Switch device; 4. Anti - accidental touch device; 5. Inlet bushing; 6. Box body; 7. Energy storage device; 9. Distribution network ice melting intelligent short - circuit switch; 11. Communication unit; 12. Switch control unit; 21. Measuring unit 21; 22. Sampling unit 22; 31. Mechanical action unit; 41. Comparison unit; 42. Switch unit; 43. Relay; 81. Support platform; 82. Diagonal brace; 83. Hoop; 100. Three - phase input end; 101. Three - phase copper busbar; 211. Voltage transformer; 212. Voltage transformer. Detailed implementation manners

[0046] In order to more clearly understand the above - mentioned objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0047] Many specific details are set forth in the following description in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all the embodiments.

[0048] The existing ice melting short - circuit devices, for example, can use a main structure with a transmission box driving two conductive tubes to achieve three - phase short - circuit. Three bases need to be built to fixedly install the ABC - phase connectors, which are mainly applicable to use in substations. The device has a large volume and requires the construction of bases, and is not suitable for distribution network lines with poles erected in the wild. Another type of ground wire ice melting line - changing switch device can be used, which uses a long conductive rod to swing under the drive of a transmission mechanism to realize the connection between the upper and lower conductors and the ground wire, mainly used to realize the short - circuit between the ground wire and the conductor of ultra - high - voltage DC transmission lines, and cannot achieve three - phase short - circuit, and is not suitable for distribution network lines without ground wires. The existing intelligent short - circuit switch patents mainly target high - voltage AC and DC transmission lines, and there is no intelligent short - circuit switch that can realize three - phase short - circuit for distribution network lines with poles erected in the wild.

[0049] In addition, there are certain differences between the distribution network lines with poles erected in the wild and the ice melting short-circuit switch in the substation, resulting in the following two difficulties for the intelligent short-circuit switch for distribution network ice melting: on the one hand, there is a dedicated site for building the ice melting short-circuit switch in the substation, while the ice melting short-circuit switch for the distribution line needs to be installed on the pole, which has high requirements for the weight and installation form of the device; on the other hand, after the line is powered off during ice melting, the switch in the substation can obtain power from the substation, while the intelligent short-circuit switch for distribution network ice melting cannot obtain power nearby. If the power cannot be obtained, the switch cannot work and will be in a disconnected state.

[0050] To solve the above problems, the embodiments of the present disclosure provide an intelligent short-circuit switch for distribution network ice melting. Figure 1 FIG. is a schematic structural diagram of an intelligent short-circuit switch for distribution network ice melting provided by the embodiments of the present disclosure. As Figure 1 shown, the intelligent short-circuit switch for distribution network ice melting includes: a control device 1, a detection device 2, and a switch device 3. The detection device 2 is respectively connected to the three-phase input terminal 100 and the control device 1. The control device 1 is connected to the switch device 3. The switch device 3 is connected to the three-phase copper bar 101. The detection device 2 is used to detect the input voltage of the three-phase input terminal 100 and send it to the control device 1; the control device 1 is used to receive a trigger instruction and control the switch device 3 to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper bar 101 is short-circuited.

[0051] Figure 2 FIG. is a schematic structural diagram of an intelligent short-circuit switch for distribution network ice melting provided by the embodiments of the present disclosure. Figure 2 Exemplarily, the detection device 2 may include a measurement unit 21 and a sampling unit 22. The measurement unit 21 may include a voltage measurement module and a current measurement module. The voltage measurement module may include a voltage transformer and its connecting components. The current measurement module may include a current transformer and its connecting components. The voltage measurement module is used to measure the input voltage of the three-phase input terminal 100. The three-phase input terminal 100 is used to connect the ABC three-phase lines of the 10 kV distribution network. The current measurement module is used to measure the ice melting current flowing through the intelligent short-circuit switch for distribution network ice melting. The sampling unit 22 is used to convert the analog signal measured by the measurement unit 21 into a digital signal and send it to the control device 1.

[0052] The switch device 3 may include a mechanical action unit 31, and the mechanical action unit 31 is used to realize the opening and closing of the switch.

[0053] Optionally, the control device is used to receive a closing trigger instruction, and send a closing action instruction to the switch device according to the closing trigger instruction and the input voltage being less than a preset voltage threshold, and control the switch device to perform a closing operation to short-circuit the three-phase copper bar.

[0054] Optionally, the control device is configured to receive a tripping trigger instruction, and send a tripping action instruction to the switch device according to the tripping trigger instruction, to control the switch device to perform a tripping operation, so as to disconnect the short circuit of the three-phase copper busbar.

[0055] Specifically, when the control device 1 receives a trigger instruction, and the trigger instruction is, for example, a closing trigger instruction, since the line needs to be powered off during the ice melting process, the input voltage of the three-phase input terminal 100 should be 0. The control device 1 sends a closing action instruction to the switch device 3 according to the closing trigger instruction and the input voltage of 0, to control the switch device 3 to perform a closing operation, so as to short-circuit the three-phase copper busbar 101. When the trigger instruction is, for example, a tripping trigger instruction, the control device 1 may send a tripping action instruction to the switch device 3 based on the tripping trigger instruction, to control the switch device 3 to perform a tripping operation, so as to disconnect the short circuit of the three-phase copper busbar 101.

[0056] Exemplarily, the rated voltage of the intelligent short-circuit switch for distribution network ice melting is 10 kV, and the rated current is 630 A, which can meet the lines with a cross-sectional area of 120 mm 2 and below. The overall structure of the switch adopts a box-type fully enclosed design, and the overall structure dimensions (length × width × height): 900 mm × 900 mm × 1100 mm.

[0057] The intelligent short-circuit switch for distribution network ice melting provided by the embodiments of the present disclosure includes: a control device 1, a detection device 2, and a switch device 3. The control device 1 is configured to receive a trigger instruction, and control the switch device 3 to perform a preset operation according to the trigger instruction and the input voltage, to control whether the three-phase copper busbar 101 is short-circuited, thereby reducing the ice melting preparation time, improving the power supply reliability of the line, and enabling intelligent remote short-circuiting at the end of the line during ice melting. There is no need for personnel to carry out pole climbing operations, and one-key remote control can achieve three-phase short-circuiting of the line, improving the safety and reliability of ice melting operations, and effectively reducing the risk of accidental contact by irrelevant personnel.

[0058] Optionally, as Figure 2 shown, the intelligent short-circuit switch for distribution network ice melting further includes: an anti-misoperation device 4, and the anti-misoperation device 4 is respectively connected to the control device 1, the detection device 2, and the switch device 3; the anti-misoperation device 4 controls the on-off of the control device 1 and the switch device 3 according to the input voltage.

[0059] Specifically, as Figure 2 shown, the anti-misoperation device 4 is respectively connected to the control device 1, the detection device 2, and the switch device 3. When the input voltage is 0, the anti-misoperation device 4 controls the switch device 3 and the control device 1 to conduct, and the control device 1 controls the switch device 3 to perform a closing operation. When the input voltage is 10 kV, the anti-misoperation device 4 also controls the control device 1 and the switch device 3 to disconnect, and the switch device 3 no longer performs a closing operation, thereby further preventing misoperation of the switches of non-ice melting devices.

[0060] Figure 3 The structural schematic diagram of an anti-misoperation device provided by an embodiment of the present disclosure. Optionally, as Figure 3 shown, the anti-misoperation device 4 includes: a comparison unit 41, a relay 43, and a switch unit 42; the negative electrode of the comparison unit 41 is connected to the detection device 2, the positive electrode of the comparison unit 41 is connected to a reference voltage, the output end of the comparison unit 41 is connected to the control end of the switch unit 42, the first end of the switch unit 42 is connected to the first end of the relay 43, the second end of the switch unit 42 is grounded, and the second end of the relay 43 is connected to the switch device 3.

[0061] Specifically, as Figure 3 shown, the comparison unit 41 can be, for example, a voltage comparator, and the switch unit 42 can be, for example, an N-type MOS transistor. The comparison unit 41 can be connected to a voltage transformer 211, the voltage transformer 211 is connected to the negative electrode of the comparison unit 41, the positive electrode of the comparison unit 41 is connected to a reference voltage Vref. When the voltage transformer 211 detects that the line voltage is 10 kV during normal operation, the negative electrode level of the comparison unit 41 is higher than the positive electrode level of the comparison unit 41, the output end of the comparison unit 41 outputs a low level, the switch unit 42 is turned off, and no current flows through the coil of the relay 43 and it will remain in the off state, and the control device 1 is disconnected from the switch device 3, and the control device 1 cannot control the switch device 3 to perform a closing operation. When the voltage transformer 211 detects that the line voltage is 0, the negative electrode level of the comparison unit 41 is lower than the positive electrode level of the comparison unit 41, the output end of the comparison unit 41 outputs a high level, the switch unit 42 is turned on, current flows through the coil of the relay 43, the control device 1 is connected to the switch device 3, and the control device 1 controls the switch device 3 to perform a closing operation. Thus, a double-issue confirmation for closing the switch device 3 is achieved, the effectiveness of the closing operation of the switch device 3 is improved, and the problem of switch misoperation is avoided.

[0062] Optionally, as Figure 2 shown, the control device 1 includes a communication unit 11 and a switch control unit 12, the communication unit 11 is connected to the switch control unit 12, and the switch control unit 12 is connected to the detection device 2; the communication unit 11 is used to receive a trigger instruction and send the trigger instruction to the switch control unit 12, and the switch control unit 12 is used to control the switch device 3 to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper bar 101 is short-circuited.

[0063] Specifically, as Figure 2 shown, the communication unit 11 is used to receive a trigger instruction sent by a background or terminal device and send the trigger instruction to the switch control unit 12. The switch control unit 12 controls the switch device 3 to perform a closing operation according to the closing trigger instruction and the input voltage, and the switch control unit 12 also controls the switch device 3 to perform a tripping operation according to the tripping trigger instruction.

[0064] The communication unit 11 is compatible with transceiver of 4G, Beidou satellite signals, etc., can meet the ice melting requirements of distribution network lines in remote mountainous areas without 4G signals, can communicate various signals recorded by the switch control unit 12 with the base station to complete the reporting of various signals, and is also used to receive various instructions sent by the base station and transmit the instruction signals to the switch control unit 12.

[0065] The switch control unit 12 can realize the functions of telemetry, remote control, and remote signaling. Telemetry includes the measurement of the power of the energy storage device, the number of opening and closing operations, the line voltage value, and the three-phase current value; remote control includes receiving and executing the instructions sent by the remote transmission, including opening and closing action instructions, etc.; remote signaling includes distinguishing the energy storage completion signal, the opening and closing position signal, various abnormal and fault signals, etc.

[0066] Figure 4 It is a schematic cross-sectional structure diagram of a distribution network ice melting intelligent short-circuit switch provided by an embodiment of the present disclosure. Figure 5 It is a schematic diagram of the conductive circuit of a distribution network ice melting intelligent short-circuit switch provided by an embodiment of the present disclosure. Optionally, in combination with Figure 4 and Figure 5 , the distribution network ice melting intelligent short-circuit switch further includes: an incoming line bushing 5 and a box body 6. The box body 6 is connected to the distribution network line through the incoming line bushing 5, and the box body 6 houses a control device 1, a detection device 2, a switch device 3, and a three-phase copper bar 101.

[0067] Specifically, as shown in Figure 4 , one side of the distribution network ice melting intelligent short-circuit switch is connected to the distribution network line (the distribution network line is not shown in Figure 4 ), and the other side is a closed cover plate, which is kept well insulated from the three-phase copper bar 101. The incoming line bushing 5 is synthesized by the epoxy resin and silicone rubber APG process. The unique silicone rubber incoming line structure makes the insulation distance between the incoming line bushings 5 sufficient, and the operation is safe and reliable. The box body 6 adopts a mature sealing structure technology. The mechanism cover and the upper cover of the box body 6 adopt a stamping "V"-shaped groove seal. The control device 1, the detection device 2, and the switch device 3 are all sealed in the box body 6, effectively ensuring reliable operation in the icing state. The mechanical action unit 31 in the switch device 3 can include, for example, a CT20 modular electric mechanism. The main spring wire diameter of the mechanism is 7.5 mm, and the closing work threshold is high, effectively ensuring the closing reliability of the electric mechanism in a low-temperature environment and realizing the switch short-circuit ice melting process. Exemplarily, the three-phase copper bar 101, the mechanical action unit 31, and the current transformer 212 are arranged in the upper box body, and the control device 1, the anti-misoperation device 4, etc. are arranged in the lower box body.

[0068] In some embodiments, as shown in Figure 2As shown in the figure, the intelligent short-circuiting switch for distribution network ice melting further includes: an energy storage device 7, which is respectively connected to the control device 1, the detection device 2, and the switch device 3; the energy storage device 7 is used to supply power to the control device 1, the detection device 2, and the switch device 3.

[0069] Specifically, a valve-regulated lead-acid battery can be used as the energy storage device 7, which can realize that the energy storage device 7 can be maintenance-free for three years. The output voltage of the energy storage device 7 is 24V, and the standby time is up to 3 days. It can realize dozens of times of switching on and off, can be replaced while energized, and has a service life of more than 3 years. In addition, when the distribution network line is operating normally, the energy storage device 7 can use the power provided by the measurement unit 21 to charge itself to ensure that the energy storage device 7 can provide sufficient power after the distribution network line is powered off.

[0070] In some embodiments, an independent lightning protection device is provided for the measurement unit 21, which can effectively prevent the intelligent short-circuiting switch for distribution network ice melting from being damaged due to the distribution line being repeatedly struck by lightning.

[0071] The embodiment of the present disclosure also provides a control method for an intelligent short-circuiting switch for distribution network ice melting. Figure 6 It is a schematic flowchart of a control method for an intelligent short-circuiting switch for distribution network ice melting provided by the embodiment of the present disclosure. This control method can be applied to application scenarios where three-phase short-circuit work needs to be carried out at the end of the distribution network line, and can be executed by the control device in the intelligent short-circuiting switch for distribution network ice melting. As Figure 6 shown, the control method of the intelligent short-circuiting switch for distribution network ice melting includes:

[0072] S101. Obtain a trigger instruction and the input voltage of the three-phase input terminal.

[0073] Exemplarily, the trigger instruction can be sent by an application software in the background or a terminal device, and the embodiment of the present disclosure does not limit this.

[0074] S102. Control the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited.

[0075] Optionally, controlling the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited includes: controlling the switch device to perform a closing operation according to the closing trigger instruction and the input voltage being less than a preset voltage threshold to control the three-phase copper busbar to be short-circuited.

[0076] Specifically, when the control device receives a closing trigger instruction and detects that the input voltage is less than a preset voltage threshold, the control device sends a closing action instruction to the switching device. If the anti-misoperation device detects that the line is energized, even if the control device sends a closing action instruction, since the relay in the anti-misoperation device is not energized, the anti-misoperation device disconnects the connection between the control device and the switching device, and the closing action instruction cannot be sent to the switching device, so the closing operation cannot be completed normally, and the control device will send an alarm signal. If the anti-misoperation device detects that the line is not energized, the closing action instruction sent by the control device is transmitted to the switching device, and the mechanical action unit in the switching device executes the closing action to realize the short-circuiting of the three-phase copper bars.

[0077] After the closing is completed, the control device can also detect the closing position of the switch. After determining that the closing is in place, the relay coil in the anti-misoperation device is de-energized, and the closing operation is completed. After the three-phase copper bars are short-circuited, line de-icing is realized until the ice on the line completely falls off, and then the opening operation is performed.

[0078] Optionally, according to the trigger instruction and the input voltage, controlling the switching device to perform a preset operation to control whether the three-phase copper bars are short-circuited, including: controlling the switching device to perform an opening operation according to an opening trigger instruction to control the disconnection of the short-circuit of the three-phase copper bars.

[0079] Specifically, when the control device receives an opening trigger instruction, the control device sends an opening action instruction to the switching device, and the mechanical action unit in the switching device executes the opening operation. After the control device detects that the opening is in place, the power supply of the line is restored orderly, and the ice melting implementation ends.

[0080] In some embodiments, when the ice melting current of the intelligent short-circuit switch for distribution network ice melting sent by the sampling unit detected by the control device is greater than a preset current threshold, the control device can identify a fault within 50 milliseconds and send an opening action instruction to the switching device to disconnect the short-circuit of the three-phase copper bars, minimizing the impact of the fault.

[0081] Optionally, after controlling the switching device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper bars are short-circuited, it further includes: continuously detecting the telemetry signal.

[0082] Exemplarily, after the switching device executes the closing action, the control device continuously detects the telemetry signal to timely detect the closing-in signal, overcurrent fault signal, and opening trigger instruction, so as to prepare for the next operation. After the switching device executes the opening action, the control device continuously detects the telemetry signal to timely detect the opening-in signal and closing trigger instruction, so as to prepare for the next operation.

[0083] Figure 7 This is a specific flow schematic diagram of a control method for an intelligent short-circuit switch for distribution network ice melting provided by an embodiment of the present disclosure. As Figure 7As shown, the control method includes:

[0084] S701. Obtain a closing trigger instruction.

[0085] S702. Determine whether the distribution network line is energized; if so, execute step S703; if not, execute step S709.

[0086] S703. Send a closing action instruction to the switch device.

[0087] S704. The anti-touch device determines whether the distribution network line is energized; if so, execute step S705; if not, execute step S709.

[0088] S705. Perform a closing operation.

[0089] S706. Confirm whether the closing is in place; if so, execute step S707; if not, execute step S709.

[0090] S707. The relay coil in the anti-touch device is de-energized.

[0091] S708. Continuously detect the tele-signal.

[0092] S709. Send an alarm message.

[0093] The embodiment of the present disclosure further provides a distribution network ice melting intelligent short-circuit switch system, including the distribution network ice melting intelligent short-circuit switch provided in the above embodiment. Figure 8 The following is a schematic structural diagram of a distribution network ice melting intelligent short-circuit switch system provided by the embodiment of the present disclosure. As Figure 8 shown, the distribution network ice melting intelligent short-circuit switch system includes: a distribution network ice melting intelligent short-circuit switch 9, a support platform 81, a diagonal brace 82, and a hoop 83; the distribution network ice melting intelligent short-circuit switch 9 is fixed on the support platform 81, the support platform 81 is connected to the hoop 83 through the diagonal brace 82, and the hoop 83 surrounds the installation pole.

[0094] Specifically, as Figure 8 shown, the distribution network ice melting intelligent short-circuit switch 9 is installed on the pole as a complete set, which can effectively avoid the personal electric shock risk caused by abnormal touch by non-staff. The distribution network ice melting intelligent short-circuit switch 9 is fixed on the support platform 81, and the diagonal brace 82 is used to further enhance the stability of the support structure.

[0095] Next, taking the ice melting implementation of the typical distribution line #05 - #35 pole with a cross-sectional area of 120 mm 2 as an example, the operation steps of closing and opening the distribution network ice melting intelligent short-circuit switch are described.

[0096] First, determine the current-carrying section. Based on the actual ice covering situation of the distribution network line, determine the section that needs to conduct current for ice melting. In the embodiment of the present disclosure, the ice-melting current-carrying section is the distribution line from pole #05 to pole #35. The intelligent short-circuit switch for distribution network ice melting is installed on one side of the ice-melting section, and the other side is connected to the ice-melting device. The pole number where the intelligent short-circuit switch for distribution network ice melting is installed can be pole #05 or pole #35. In this embodiment, pole #35 is selected. Install the intelligent short-circuit switch for distribution network ice melting on pole #35. First, install the equipment platform, fix it with a hoop, and reinforce it with a diagonal brace. Then, fixedly install the intelligent short-circuit switch for distribution network ice melting on the support platform. Use a conventional bare wire or insulated wire with a cross-sectional area of 120 mm 2 and connect one end to the intelligent short-circuit switch for distribution network ice melting through a bolt, and the other end to the 10 kV distribution network line through a T-shaped clamp. After connecting the distribution network line, test the opening and closing performance of the switch under the power-off state of the line. After three consecutive successful opening and closing operations, it indicates that the communication function is normal. The installation and location setting are completed.

[0097] Before ice melting implementation, first cut off the power supply of the 10 kV distribution network line. Send a closing trigger command through the application software of the background or terminal device. The intelligent short-circuit switch for distribution network ice melting detects whether the distribution network line is energized. For example, when the input voltage detected by the detection device is 0, it is determined that the distribution network line is not energized, and the control device sends a closing action command to the switch device. When the input voltage detected by the detection device is 10 kV, it is determined that the distribution network line is energized, then the closing operation is refused to be executed, and an alarm signal is sent simultaneously.

[0098] If the anti-misoperation device detects that the distribution network line is energized, even if the control device sends a closing action command, since the relay coil is not energized, the closing operation cannot be successfully completed at this time, and the intelligent short-circuit switch for distribution network ice melting will send an alarm signal. If the anti-misoperation device detects that the distribution network line is not energized, it will execute the closing action command sent by the control device, the mechanical action unit acts, and the switch closes smoothly. After closing, perform the detection of the switch closing position to confirm whether the switch is closed in place. After confirming that it is closed in place, the relay coil is de-energized, and the three-phase short-circuit closing operation is completed. After the three-phase short-circuit is completed, implement line ice melting until the ice on the line completely falls off, and then perform the opening operation of the intelligent short-circuit switch for distribution network ice melting.

[0099] Send an opening trigger command through the application software of the background or terminal device. The control device sends an opening action command to the switch device based on the opening trigger command, controls the mechanical action unit in the switch device to perform the opening operation, confirms that the opening is in place, and orderly restores the power supply of the line, and the ice melting implementation ends.

[0100] The intelligent short-circuit switch for distribution network ice melting, control method and system provided by the embodiments of the present disclosure. The intelligent short-circuit switch for distribution network ice melting includes a control device, a detection device and a switch device. The detection device is respectively connected to the three-phase input end and the control device, the control device is connected to the switch device, and the switch device is connected to the three-phase copper bar. The detection device is used to detect the input voltage of the three-phase input end and send it to the control device; the control device is used to receive a trigger instruction, and control the switch device to perform a preset operation according to the trigger instruction and the input voltage, so as to control whether the three-phase copper bar is short-circuited. Thus, intelligent remote short-circuit at the end of the line during ice melting can be realized, without the need for personnel to carry out pole climbing operations, and the three-phase short-circuit of the line can be achieved with one-key remote control. If the conventional method is used for manual three-phase short-circuit, the operators need to go to the end of the line to carry out ice melting short-circuit operations. In winter, it is difficult for personnel to climb poles due to icing on the poles. When using foot pedals to climb poles, the friction is small, and there is a risk of personnel falling from the poles; if ice-breaking tools are used to break the ice and then climb the poles, it will consume a great deal of manpower and material resources. In addition, in winter, the roads are icy, resulting in great potential safety hazards for the operators on their way to the work site. By using the intelligent short-circuit switch for distribution network ice melting and its control method provided by the embodiments of the present disclosure, it is possible to better avoid personnel going to the end of the line in winter, effectively improve the safety and reliability of ice melting operations; and effectively reduce the risk of accidental contact by unrelated personnel. The intelligent short-circuit switch for distribution network ice melting is fixed on the pole, and the distance from the ground is higher than 5m, rather than being directly installed on the ground, which can effectively avoid misoperations by non-operating personnel and can also effectively prevent the intrusion of small animals, and the device has high reliability.

[0101] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0102] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A distribution network ice melting intelligent short-circuit switch, characterized in that: include: A control device, a detection device and a switch device, wherein the detection device is connected to the three-phase input terminal and the control device respectively, the control device is connected to the switch device, and the switch device is connected to the three-phase copper busbar. The detection device is used to detect the input voltage of the three-phase input terminal and send it to the control device; The control device is used to receive a trigger instruction, and control the switch device to perform a preset operation according to the trigger instruction and the input voltage, so as to control whether the three-phase copper busbar is short-circuited.

2. The distribution network ice melting intelligent short-circuit switch according to claim 1 is characterized in that: The control device is used to receive a closing trigger instruction, and send a closing action instruction to the switch device according to the closing trigger instruction and the input voltage being less than a preset voltage threshold, to control the switch device to perform a closing operation to short-circuit the three-phase copper busbar.

3. The distribution network ice melting intelligent short-circuit switch according to claim 1 is characterized in that: The control device is used to receive a switch-off trigger instruction, and send a switch-off action instruction to the switch device according to the switch-off trigger instruction, so as to control the switch device to perform a switch-off operation so as to disconnect and short-circuit the three-phase copper busbar.

4. The distribution network ice melting intelligent short-circuit switch according to claim 1, characterized in that: Also includes: An anti-accidental touch device, the anti-accidental touch device is respectively connected to the control device, the detection device and the switch device; The false touch prevention device controls the on and off of the control device and the switch device according to the input voltage.

5. The distribution network ice melting intelligent short-circuit switch according to claim 4 is characterized in that: The anti-mistouch device comprises: a comparison unit, a relay and a switch unit; The negative electrode of the comparison unit is connected to the detection device, the positive electrode of the comparison unit is connected to the reference voltage, the output end of the comparison unit is connected to the control end of the switch unit, the first end of the switch unit is connected to the first end of the relay, the second end of the switch unit is grounded, and the second end of the relay is connected to the switch device.

6. The distribution network ice melting intelligent short-circuit switch according to claim 1, characterized in that: The control device comprises a communication unit and a switch control unit, wherein the communication unit is connected to the switch control unit, and the switch control unit is connected to the detection device; The communication unit is used to receive a trigger instruction and send the trigger instruction to the switch control unit. The switch control unit is used to control the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited.

7. The distribution network ice melting intelligent short-circuit switch according to claim 1, characterized in that: Also includes: An incoming line bushing and a box body, wherein the box body is connected to the distribution network line through the incoming line bushing, and the box body contains the control device, the detection device, the switch device and the three-phase copper busbar.

8. A control method for a distribution network ice melting intelligent short-circuit switch, characterized in that: Applicable to the distribution network ice-melting intelligent short-circuit switch as described in any one of claims 1 to 7; The control method comprises: Obtaining trigger instructions and input voltages of three-phase input terminals; The switch device is controlled to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited.

9. The control method of the distribution network ice melting intelligent short-circuit switch according to claim 8 is characterized in that: The trigger instruction is a closing trigger instruction; The controlling the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited includes: According to the closing trigger instruction and the input voltage being less than the preset voltage threshold, the switch device is controlled to perform the closing operation to short-circuit the three-phase copper busbar.

10. The control method of the distribution network ice-melting intelligent short-circuit switch according to claim 8, characterized in that: The trigger instruction is a gate opening trigger instruction; The controlling the switch device to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited includes: The switch device is controlled to perform the opening operation according to the opening trigger instruction to control the three-phase copper busbar to be disconnected and short-circuited.

11. The control method of the distribution network ice melting intelligent short-circuit switch according to claim 8, characterized in that: After the switching device is controlled to perform a preset operation according to the trigger instruction and the input voltage to control whether the three-phase copper busbar is short-circuited, the method further includes: Continuously monitor telemetry signals.

12. A distribution network ice melting intelligent short-circuit switch system, characterized in that: The invention comprises the distribution network ice-melting intelligent short-circuit switch according to any one of claims 1 to 7; and further comprises: Support platforms, diagonal braces and hoops; The distribution network ice-melting intelligent short-circuit switch is fixed on the support platform, the support platform is connected to the clamp through the diagonal support, and the clamp is surrounded on the mounting rod.

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