CN106304436B - A kind of self-melting ice conductor ice-melting equipment - Google Patents

Abstract

The invention discloses a self-melting ice conductor and an ice melting device thereof. The method adopts the structure of a conductor as a heating power supply conductor, the self-melting ice conductor adopts a coaxial cable form and comprises an outer conductor, a heating material and an inner conductor, and the ice melting equipment is directly connected to the inner conductor and the outer conductor of the self-melting ice conductor. The heating material is a heating material with positive temperature coefficient effect, and is arranged between the inner conductor and the outer conductor to completely isolate the inner conductor and the outer conductor. The automatic ice melting equipment consists of a transformer, a switching circuit, a microprocessor, a communication module and an icing induction module. The microprocessor is connected with the communication module, the icing induction module and the switch circuit, receives the control signal of the communication module, transmits data to the communication module and receives the data of the icing induction module, and the control center controls the automatic ice melting equipment to operate through the communication module. The invention implements ice melting under the control of the control center, can avoid the situation of power failure and serious line fault when melting ice on the high-voltage transmission line, and greatly improves the existing ice melting technology.

Description

A kind of self-melting ice conductor ice-melting equipment

(1) Technical field

The invention relates to the technical field of ice-melting conductors, in particular to ice-melting equipment for self-melting ice conductors.

(2) Background technology

With the development of social economy, the demand for national electric power and communication lines continues to increase. Under the environment of increasing power load applications, the requirements for exposed lines, especially power lines, are getting higher and higher. In the cold winter, the lines in many areas will freeze, causing damage to the lines. When the icing exceeds the bearing capacity of the line, serious accidents such as disconnection will also occur. Therefore, deicing of power lines or other lines in winter is essential and very important.

The existing self-melting ice conductors all need to add materials that can be heated by a power supply. When using heating materials, the heating materials need to have special wires to connect to the heating power supply. In addition, since the existing self-melting ice wire needs a special wire connected to the heating power source, it is very inconvenient to divide the existing self-melting ice wire.

The application number is CN201210395025.7 "New Low-Temperature Infrared Heating Automatic Deicing Lightning Protection Wire", which combines a new type of auxiliary heating wire made of conductive polyester fiber that can generate low-temperature infrared heat energy with ordinary lightning protection wires, and is hinged on The center of the steel hinge line. When the auxiliary power supply is loaded on the auxiliary heating wire, the auxiliary heating wire will generate low-temperature infrared heat energy, which will increase the temperature of the steel hinge wire to achieve the purpose of preventing or automatically deicing. However, the wires made by this method are not convenient to be divided into arbitrary lengths during use, and the conductor of the heating power supply used for heating is a dedicated conductor for heating, which is difficult to maintain. Application number CN201510400177.5 "Deicing carbon fiber high and low voltage overhead cables", deicing carbon fiber high and low voltage overhead cables, including high voltage cables, high voltage cables are composed of internal high voltage cables and surface insulation layers, and the surface of the insulation layer of high voltage cables is set Carbon fiber heating wire. By setting a carbon fiber heating wire that can be energized and heated on the surface of the high-voltage cable, the carbon fiber is used to convert electrical energy into heat, thereby ensuring the normal operation of the high-voltage cable in severe cold regions or in winter. But the lead wire that this method makes is inconvenient to split at arbitrary length equally when using, and the conductor of the heating power source that heat generation uses is heating special conductor, is difficult to maintain.

(3) Contents of the invention

The object of the present invention is to aim at the deficiencies of the prior art, to design a self-melting ice-melting wire that uses the structure of the conductor itself as a heating power conductor, and to design an automatic ice-melting device connected to the self-melting ice wire to automatically complete the wiring of the conductor line. Melting works. The heating power wire of the present invention can be divided arbitrarily, which is convenient for maintenance.

The purpose of the present invention is achieved like this:

A self-melting ice-melting conductor ice-melting device is characterized in that a part of the structure of the conductor itself is used as the self-melting ice-melting conductor of the heating element, and the ice-melting device is directly connected to the inner conductor and the outer conductor of the self-melting ice conductor.

The self-melting ice conductor is in the form of a coaxial cable, including an outer conductor, a heating material, and an inner conductor. The inner conductor is a cylindrical metal, and the heating material is a heating material with a positive temperature coefficient effect. The heating material surrounds the outside of the inner conductor and completely surrounds the outer circumference of the inner conductor, so that the inner and outer conductors are completely isolated and the short circuit of the inner and outer conductors is avoided. The inner surface of the heating material is in full contact with the outer surface of the inner conductor, and the outer surface of the heating material is in full contact with the inner surface of the outer conductor. The outer conductor surrounds the heating material.

The inner conductor is a single metal wire or a metal stranded wire or a metal tube embedded with an optical fiber or a single alloy wire or an alloy stranded wire. The outer conductor is a metal tube or an alloy tube or a metal strand or an alloy strand.

The automatic ice-melting device is composed of a transformer, a switch circuit, a microprocessor, a communication module and an ice sensing module. The microprocessor connects the communication module, the icing sensing module and the switch circuit, receives the control signal of the communication module, transmits data to the communication module, and receives the data of the icing sensing module, the control center transmits the control command to the microprocessor, and the microprocessor responds to the control The center commands and controls the operation of automatic ice melting equipment.

When the self-melting ice conductor is used as a non-power transmission line, the automatic ice melting equipment is provided with two switching circuits.

The two ends of the power supply are connected to the primary winding of the transformer, and the secondary winding of the transformer is connected to two switching circuits. Connect the other end of the transformer secondary winding to the outer conductor of the self-melting ice conductor. The switching states of the two switching circuits are controlled by the microprocessor. The inner conductor and the outer conductor of the self-melting ice conductor are respectively connected to two switching circuits.

When the self-melting ice conductor is used as an overhead transmission line conductor, the automatic ice-melting equipment is equipped with a switch circuit, the inner conductor of the self-melting ice conductor is connected to one end of the switch circuit, and the outer conductor of the self-melting ice conductor is connected to the substation of the overhead power transmission line system. Output power connection. In the automatic ice-melting equipment, the outer conductor of the self-melting ice conductor and the ground wire system of the overhead transmission line are respectively connected to both ends of the primary winding of the transformer. The two ends of the secondary winding of the transformer are respectively connected to the switch circuit and the ground wire system of the overhead transmission line. Two ends of the switch circuit are respectively connected to one end of the secondary winding of the transformer and the inner conductor of the self-melting ice conductor. The switching circuit is controlled by a microprocessor.

When the self-melting ice conductor is used as the ground wire of the overhead transmission line, the automatic ice-melting equipment is equipped with a switch circuit, the inner conductor of the self-melting ice conductor is connected to one end of the switch circuit, and the outer conductor of the self-melting ice conductor is connected to the ground wire system of the overhead transmission line connect. In the automatic ice-melting equipment, the outer conductor of the self-melting ice conductor and the conductor of the overhead power transmission line are respectively connected to both ends of the primary winding of the transformer. When the conductor of the overhead power transmission line adopts the self-melting ice conductor of the present invention, the primary winding is connected to the conductor the outer conductor. The two ends of the secondary winding of the transformer are respectively connected to the switch circuit and the outer conductor of the self-melting ice conductor; the two ends of the switch circuit are respectively connected to one end of the secondary winding of the transformer and the inner conductor of the self-melting ice conductor. The switching circuit is controlled by a microprocessor.

When the inner conductor is a single metal wire, the single metal wire is one of a single steel wire or a single galvanized steel wire or a single aluminum-clad steel core wire or a single metal tube embedded with an optical fiber; the outer conductor is 6 or 18 metal stranded wires, the metal stranded wire is one of 6 or 18 aluminum wire stranded wires, aluminum alloy stranded wires, and aluminum-clad steel core stranded wires.

When the inner conductor or the outer conductor is a metal strand or an alloy strand, one or more strands of the metal strand or alloy strand are replaced by a metal tube embedded with an optical fiber.

When the inner conductor is a metal strand, the metal strand is one of 7 steel wire strands, galvanized steel wire, aluminum-clad steel core wire, and metal tube with embedded optical fiber; the outer conductor is 12 or 24 aluminum Wire stranded wire, aluminum alloy stranded wire, aluminum clad steel core stranded wire, one of the metal tubes embedded with optical fibers.

In addition to the selection of the above-mentioned inner conductor and outer conductor, the inner conductor can be the innermost coil of aluminum stranded wire or steel-reinforced aluminum stranded wire designed according to the provisions of the national standard of the People's Republic of China for aluminum stranded wire and steel-reinforced aluminum stranded wire GB1179 , or from the inside to the outside, except for the outermost circle of wires. The outer conductor can be the aluminum stranded wire or all wires of the steel-cored aluminum stranded wire except the inner conductor designed according to the provisions of the national standard of the People's Republic of China for aluminum stranded wire and steel-cored aluminum stranded wire GB1179. Both the inner conductor and the outer conductor can choose one of steel wire strands, galvanized steel wires, aluminum-clad steel core wires, metal tubes with embedded optical fibers, aluminum wire strands, and aluminum alloy strands. For one or several strands in the twisted wire, a metal tube with embedded optical fiber can be selected.

The metal tube embedded with the optical fiber is composed of a protective metal tube, a protective filler and n optical fibers, the protective metal tube is outside, and n optical fibers are placed inside, and the protective filler is filled between the optical fiber and the protective metal tube.

When the self-melting ice conductor is used as a non-transmission system, the input voltage of the primary winding of the transformer is the power supply voltage, and the output voltage of the secondary winding is the working voltage of the heating material; when the self-melting ice conductor is used as an overhead transmission line conductor, the primary winding input voltage of the transformer is The voltage is the conductor voltage of the transmission line, and the output voltage of the secondary winding is the conductor voltage of the transmission line minus the working voltage of the heating material, or the conductor voltage of the transmission line plus the working voltage of the heating material; when the self-melting ice conductor is used as the ground wire of the overhead transmission line , the input voltage of the primary winding of the transformer is the conductor voltage of the transmission line, and the output voltage of the secondary winding is the working voltage of the heating material.

The heating material in the self-melting ice conductor is distributed discontinuously in the coaxial cable, and the heating material between discontinuous distributions is filled with insulating material, and adjacent heating materials and insulating materials are closely connected without gaps in the middle.

The control program of the microprocessor is:

Step 1: Receive commands from the control center through the communication module;

Step 2: Analyze the control center command, whether to start melting ice? Yes, go to step seven; no, go to step three;

Step 3: Analyze the command of the control center, whether to end the ice melting? Yes, go to Step 6; No, go to Step 4;

Step 4: Analyze the command of the control center, whether the switching circuit is controlled by the icing sensing module? Yes, go to Step 5; No, go to Step 1;

Step 5: Determine whether there is ice found by the icing sensor module? No ice: go to the sixth step; with ice, go to the seventh step;

Step 6: Disconnect the switch circuit and enter the first step.

Step 7: Connect the switch circuit and enter the first step.

The positive effect of the present invention is:

1. By adopting the technology of the present invention, ice melting can be implemented when the high-voltage transmission line is working, avoiding the situation that the existing ice-melting technology needs to be powered off, and is conducive to the reliable operation of the high-voltage transmission line.

2. The ice can be melted under the control of the control center, or it can be judged that the power line is frozen to automatically melt the ice, and it can also be heated to avoid freezing when it is judged that the high-voltage overhead power line is about to freeze.

3. With this method, there will be no ice on the high-voltage transmission line, avoiding the galloping phenomenon of the high-voltage transmission line, and preventing serious accidents such as disconnection of the high-voltage transmission line caused by icing.

(4) Description of drawings

Fig. 1 is a schematic diagram of the structure of the self-melting ice conductor of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the self-melting ice conductor of the present invention.

Fig. 3 is a schematic diagram of the self-melting ice conductor structure in which the inner conductor is a single wire and the outer conductor is 6 metal stranded wires.

Fig. 4 is a schematic diagram of the self-melting ice conductor structure in which the inner conductor is a single wire and the outer conductor is 18 metal strands.

Fig. 5 is a schematic diagram of the structure of the self-melting ice conductor with 7 metal strands as the inner conductor and 12 metal strands as the outer conductor.

Figure 6 is a schematic diagram of the structure of a self-melting ice conductor with 7 metal strands as the inner conductor and 24 metal strands as the outer conductor

Fig. 7 is a structural schematic diagram of a metal tube embedded with an optical fiber.

Fig. 8 is a schematic diagram of the continuous distribution of heating materials in the self-melting ice conductor.

Fig. 9 is a schematic diagram of discontinuous distribution of heating materials in the self-melting ice conductor.

Fig. 10 is a schematic diagram of the structural connection of the automatic ice-melting equipment when the self-melting ice conductor is used as a non-power transmission line.

Fig. 11 is a schematic diagram of the structural connection of the automatic ice-melting equipment when the self-melting ice conductor is used as the conductor of the overhead transmission line.

Fig. 12 is a schematic diagram of the structural connection of the automatic ice-melting equipment when the self-melting ice conductor is used as the ground wire of the overhead transmission line.

Figure 13 is a schematic diagram of the switch circuit structure.

Fig. 14 is a circuit diagram of a microprocessor.

Figure 15 is a schematic diagram of the microprocessor RS232 interface.

Fig. 16 is a circuit diagram of a five-volt to three-volt power conversion circuit.

Fig. 17 is a three-volt to two-volt power conversion circuit diagram.

Figure 18 is a JTAG circuit diagram.

Figure 19 is a microprocessor control flow chart.

In the figure, 1 outer conductor, 2 heating material, 3 inner conductor, 4-1, 4-2, 4-3, 4-4, 4-5, 4-6 are 6 metal strands of outer conductor, 5- 1. 5-2, 5-3, 5-4, 5-5, 5-6 are 6 metal stranded wires in the inner ring of the outer conductor, 6-1, 6-2, 6-3, 6-4, 6 -5, 6-6, 6-7, 6-8, 6-9, 6-10, 6-11, 6-12 are 12 metal stranded wires in the outer ring of the outer conductor, 7 is the innermost metal of the inner conductor Conductors, 8-1, 8-2, 8-3, 8-4, 8-5, 8-6 6 metal strands of inner conductor outer ring, 9-1, 9-2, 9-3, 9- 4. 9-5, 9-6, 9-7, 9-8, 9-9, 9-10, 9-11, 9-12 are 12 metal stranded wires with outer conductors, 10-1, 10-2 , 10-3, 10-4, 10-5, 10-6, 10-7, 10-8, 10-9 9 metal stranded wires in the inner ring of the outer conductor, 11-1, 11-2, 11-3 , 11-4, 11-5, 11-6, 11-7, 11-8, 11-9, 11-10, 11-11, 11-12, 11-13, 11-14, 11-15 are outside 15 metal stranded wires in the outer ring of the conductor, 12 is a protective metal tube, 13 is a protective filler, 14-1, 14-2, 14-3, 14-n-1, 14-n optical fiber, 15-1, 15- 2. 15-3, 15-4 are discontinuously distributed heating materials, 16-1, 16-2, 16-3, 16-4 are discontinuously distributed insulating materials, 17 power supply, 18 transformer, 19-1, 19- 2. 19-3, 19-4 switching circuit, 20 self-melting ice conductor, 21 communication module, 22 microprocessor, 23 icing sensing module, 24 control center, 25 overhead transmission line ground wire, 26 overhead transmission line conductor.

(5) Specific implementation methods

See attached drawings 1-7.

The present invention uses a self-melting ice conductor 20 that uses a part of the conductor itself as a heating element, and the ice-melting equipment is directly connected to the inner conductor 3 and the outer conductor 1 of the self-melting ice conductor 20 .

The self-melting ice conductor 20 is in the form of a coaxial cable, including an outer conductor 1 , a heating material 2 and an inner conductor 3 . The inner conductor is a cylindrical metal, and the heating material is a heating material with a positive temperature coefficient effect. The heating material 2 surrounds the outer surface of the inner conductor 3 and completely surrounds the outer circumference of the inner conductor, so that the inner and outer conductors are completely isolated and the inner and outer conductors are prevented from short circuiting. The inner surface of the heating material is in full contact with the outer surface of the inner conductor, and the outer surface of the heating material is in full contact with the inner surface of the outer conductor; the outer conductor is surrounded by the outer surface of the heating material. When alternating current or direct current is applied between the inner conductor and the outer conductor, the heating material converts electrical energy into heat energy, which increases the temperature of the conductor and melts the ice outside the conductor. The voltage required for the heating material to generate heat is called the working voltage of the heating material.

The heating material is the irradiation cross-linked PTC semiconductor material produced by Wuhu Jiahong New Material Co., Ltd. The working voltage of the heating material is AC 220 volts.

The inner conductor 1 is a single metal wire or a metal stranded wire or a metal tube embedded with an optical fiber or a single alloy wire or an alloy stranded wire; the outer conductor 3 is a metal tube or an alloy tube or a metal stranded wire or an alloy stranded wire.

When the inner conductor is a single wire, the material of the wire is metal or alloy or a metal tube embedded with optical fiber, which may or may not have anti-corrosion capability. The inner conductor can also be a metal stranded wire, and the stranded wire is a metal or an alloy, which may or may not have anti-corrosion capability. The strands consist of one or more metal tubes with embedded optical fibers.

The outer conductor is a metal or alloy surrounded by the heating material, which can be a metal tube or an alloy tube, or a metal strand or an alloy strand. Metals and alloys may or may not be corrosion resistant. The strands consist of one or more metal tubes with embedded optical fibers.

The inner conductor is designed according to the national standard of the People's Republic of China for aluminum stranded wire and aluminum steel-reinforced wire GB1179. external wires. If there are 3 turns of wire, and they are called the first turn, the second turn, and the third turn from the inside to the outside. Then the inner conductor can be the first circle, or the first circle and the second circle. If there are 4 turns of wire, and they are called the first turn, the second turn, the third turn, and the fourth turn from the inside to the outside. Then the inner conductor can be the first circle, the first circle and the second circle, or the first circle, the second circle and the third circle. If there are 5 turns of wire, and they are called the first turn, the second turn, the third turn, the fourth turn, and the fifth turn from the inside to the outside. Then the inner conductor can be the first circle, the first circle and the second circle, or the first circle, the second circle, the third circle and the fourth circle.

The outer conductor is designed according to the national standard of the People's Republic of China for aluminum stranded wire and steel-cored aluminum stranded wire GB1179, except for the inner conductor of the aluminum stranded wire or steel-cored aluminum stranded wire.

When the inner conductor is a self-melting ice conductor structure of a single metal wire, the single metal wire is a single steel wire or a single galvanized steel wire or a single aluminum-clad steel core wire or a single metal tube embedded with an optical fiber. One; the outer conductor is 6 or 18 metal stranded wires, and the metal stranded wire is one of 6 or 18 aluminum wire stranded wires, aluminum alloy stranded wires, and aluminum-clad steel core stranded wires. As shown in Figure 3, the outer conductor is 6 metal twisted wires. In the figure, 4-1, 4-2, 4-3, 4-4, 4-5, 4-6 are 6 metal stranded wires of the outer conductor. As shown in Figure 4, the outer conductors are 18 metal stranded wires, wherein the outer conductors are arranged in 2 circles, 5-1, 5-2, 5-3, 5-4, 5-5, 5-6 are outer 6 metal strands in the inner ring of the conductor, 6-1, 6-2, 6-3, 6-4, 6-5, 6-6, 6-7, 6-8, 6-9, 6-10, 6-11 and 6-12 are 12 metal stranded wires of the outer ring of the outer conductor.

When the inner conductor is a metal stranded wire, the metal stranded wire is one of 7 steel wire stranded wires, galvanized steel wires, aluminum-clad steel core wires, and metal tubes embedded with optical fibers. Fig. 5 is a schematic diagram of the structure of the self-melting ice conductor with 7 metal strands as the inner conductor and 12 metal strands as the outer conductor. The inner conductor is divided into 2 circles, 7 is the innermost metal wire of the inner conductor, 8-1, 8-2, 8-3, 8-4, 8-5, 8-6 are 6 metal stranded wires in the outer circle of the inner conductor . 9-1, 9-2, 9-3, 9-4, 9-5, 9-6, 9-7, 9-8, 9-9, 9-10, 9-11, 9-12 are outer conductors 12 metal stranded wires.

Fig. 6 is a schematic diagram of the structure of the self-melting ice conductor with 7 metal strands as the inner conductor and 24 metal strands as the outer conductor. The inner conductor is divided into 2 circles, 7 is the innermost metal wire of the inner conductor, 8-1, 8-2, 8-3, 8-4, 8-5, 8-6 are 6 metal stranded wires in the outer circle of the inner conductor . The outer conductor is also divided into 2 circles, 10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8, 10-9 9 inner circles of the outer conductor Stranded wire, 11-1, 11-2, 11-3, 11-4, 11-5, 11-6, 11-7, 11-8, 11-9, 11-10, 11-11, 11- 12, 11-13, 11-14, 11-15 are 15 metal stranded wires of the outer ring of the outer conductor.

Referring to FIG. 7 , a schematic structural diagram of a metal tube embedded with an optical fiber. The metal tube embedded with optical fiber is composed of protective metal tube 12, protective filler 13 and optical fiber 14-1, 14-2, 14-3, 14-n-1, 14-n. The protective metal tube 12 is placed outside and inside There are n optical fibers, and the protective filler 13 is filled between the optical fibers and the protective metal tube.

See Figure 8, Figure 9.

The heating material in the self-melting ice conductor can be distributed continuously or discontinuously. The schematic diagram of the continuous distribution of heating materials is shown in Figure 8. The discontinuous distribution of the heating material in the self-melting ice conductor is shown in Figure 9.

The distribution of the heating material 2 in the self-melting ice conductor 20 in the coaxial cable adopts intermittent distribution, and the heating material 15-1, 15-2, 15-3, and 15-4 between the intermittent distribution use insulating material 16-1, 16-2, 16-3, 16-4 filled, the adjacent heating material is closely connected with the insulating material, and there is no gap in the middle. The intermittently distributed heating material is in the form of a tube. The example in the figure is four segments. The actual number can be arbitrarily interrupted according to the needs. Discontinuous distribution of insulating material, in the form of tubes. The example in the figure is four segments. The actual number can be less than one section, equal to, or more than the number of heating material sections according to the needs. The insulating material may be fluoropolymer insulating material or other insulating material.

See Figure 10-12.

Automatic ice-melting equipment is made up of transformer 18, switch circuit, microprocessor 22, communication module 21, icing induction module 23, and microprocessor connects communication module, icing induction module and switch circuit, receives communication module control signal, sends to communication The module transmits data and receives data from the icing sensing module. The control center transmits control commands to the microprocessor through the communication module. The microprocessor responds to the commands of the control center and controls the operation of the automatic ice-melting equipment. According to the difference when the self-melting ice conductor is used as a non-transmission line, as an overhead transmission line conductor, or as an overhead transmission line ground wire, the connection relationship between the automatic ice-melting equipment and the self-melting ice conductor and the design of the switch circuit and transformer are different. different.

When the self-melting ice conductor is used as a non-power transmission line, the automatic ice melting equipment is provided with two switching circuits 19-1, 19-2; the two ends of the power supply are connected to the primary winding of the transformer 18, and the secondary winding of the transformer is connected to the two switches Circuits 19-1 and 19-2, the two ends of the switch circuit 19-2 are respectively connected to one end of the secondary winding of the transformer and the inner conductor of the self-melting ice conductor, and the two ends of the switch circuit 19-1 are respectively connected to the other end of the secondary winding of the transformer and The outer conductor of self-melting ice conductor; two switch circuits 19-1, 19-2 switch states are controlled by microprocessor 22; The inner conductor 3 and outer conductor 1 of self-melting ice conductor 20 are respectively connected to switch circuit 19-2 and 19-1.

The control center controls the operation of the automatic ice-melting equipment through the communication module. The communication module is connected with the microprocessor, and is used for transmitting the control command of the control center to the microprocessor, and transmitting the data of the microprocessor to the control center. The microprocessor connects the communication module, the icing sensing module and two switch circuits, receives the control signal of the communication module, transmits data to the communication module, and receives the data of the icing sensing module. According to the data of the icing sensing module and the command of the control center sent by the communication module, the on and off of the switching circuit is controlled. The icing sensing module is connected with the microprocessor, and sends sensing data to the microprocessor.

When the self-melting ice conductor is used as an overhead transmission line conductor, the automatic ice-melting equipment is provided with a switch circuit 19-3, the inner conductor 3 of the self-melting ice conductor is connected to one end of the switch circuit 19-3, and the outer conductor 1 of the self-melting ice conductor It is connected with the output power of the substation of the overhead power transmission system; in the automatic ice-melting equipment, the outer conductor 1 of the self-melting ice conductor and the ground wire system of the overhead power transmission line are respectively connected to the two ends of the primary winding of the transformer 18; the two ends of the secondary winding of the transformer 18 are respectively Connect the switch circuit 19-3 and the ground wire system of the overhead transmission line; the two ends of the switch circuit 19-3 are respectively connected to one end of the secondary winding of the transformer 18 and the inner conductor 3 of the self-melting ice conductor; the switch circuit is controlled by a microprocessor.

The control center controls the operation of the automatic ice-melting equipment through the communication module. The communication module is connected with the microprocessor, and is used for transmitting the control command of the control center to the microprocessor, and transmitting the data of the microprocessor to the control center. The microprocessor connects the communication module, the icing sensing module and the switch circuit, receives the control signal of the communication module, transmits data to the communication module, and receives the data of the icing sensing module. According to the data of the icing sensing module and the command of the control center sent by the communication module, the on and off of the switching circuit is controlled. The icing sensing module is connected with the microprocessor, and sends sensing data to the microprocessor.

When the self-melting ice conductor is used as the ground wire of the overhead transmission line, the automatic ice-melting equipment is provided with a switch circuit 19-4, the inner conductor 3 of the self-melting ice conductor is connected to one end of the switch circuit 19-4, and the outer conductor 1 of the self-melting ice conductor Connect with the ground wire system of the overhead power transmission line; in the automatic ice-melting equipment, the outer conductor 1 of the self-melting ice conductor and the overhead power transmission line conductor 26 are respectively connected to the two ends of the primary winding of the transformer 18, when the overhead power transmission line conductor adopts the present invention When the self-melting ice conductor is used, the primary winding is connected to the outer conductor of the overhead transmission line conductor 26; the two ends of the secondary winding of the transformer 18 are respectively connected to the switch circuit 19-4 and the outer conductor 1 of the self-melting ice conductor; the two ends of the switch circuit 19-4 are respectively One end of the secondary winding of the transformer 18 is connected with the inner conductor 3 of the self-melting ice conductor; the switch circuit is controlled by a microprocessor.

The control center controls the operation of the automatic ice-melting equipment through the communication module. The communication module is connected with the microprocessor, and is used for transmitting the control command of the control center to the microprocessor, and transmitting the data of the microprocessor to the control center. The microprocessor connects the communication module, the icing sensing module and the switch circuit, receives the control signal of the communication module, transmits data to the communication module, and receives the data of the icing sensing module. According to the data of the icing sensing module and the command of the control center sent by the communication module, the on and off of the switching circuit is controlled. The icing sensing module is connected with the microprocessor, and sends sensing data to the microprocessor.

When the self-melting ice conductor is used as a non-transmission system, the input voltage of the primary winding of the transformer 18 is the power supply voltage, and the output voltage of the secondary winding is the working voltage of the heating material; when the self-melting ice conductor is used as an overhead transmission line conductor, the primary winding of the transformer 18 The input voltage is the conductor voltage of the transmission line, and the output voltage of the secondary winding is the conductor voltage of the transmission line minus the working voltage of the heating material, or the conductor voltage of the transmission line plus the working voltage of the heating material; when the self-melting ice conductor is used as the ground wire of the overhead transmission line , the input voltage of the primary winding of the transformer 18 is the conductor voltage of the transmission line, and the output voltage of the secondary winding is the working voltage of the heating material.

See accompanying drawings 13-18.

Figure 13 switch circuit, KT is Japan's Omron company, LY1-J, UT1: produced for Japan's Toshiba company, TLP521. QT4 is Fairchild Semiconductor Corporation of the United States: SS9013,

QT1 is the US Fairchild Semiconductor Corporation: IN4148.

The switch port A is connected to the transformer, and the switch port B is connected to the inner conductor or the outer conductor of the self-melting ice conductor.

RELAYIN1 connects the network of the same name to the microprocessor circuit.

In the present embodiment, the microprocessing adopts U11: MSP430F5438: single-chip microcomputer as shown in Fig. 14, produced by TEXASINSTRUMENTS Company of the United States. The schematic diagram of the RS232 interface of the microprocessor is shown in Figure 15. In the figure, U8: MAX232: RS232 interface chip, produced by Maxim Corporation of the United States.

The five-volt to three-volt power conversion circuit is shown in Figure 16, the three-volt to two-volt power conversion circuit is shown in Figure 17, and the JTAG circuit diagram is shown in Figure 18. In the figure, UP18: LM26400Y: power conversion chip, produced by NATIONAL SEMICONDUCTOTR company in the United States.

The communication module of the present invention may be an optical fiber communication module, or a wireless transmission communication module. This embodiment adopts a wireless transmission communication module: a G300 GSM data transmission module produced by Beijing Jiemai Communication Equipment Co., Ltd. The interface of G300 GSM data transmission module is connected with the RS232 interface of the microprocessor.

The icing sensing module adopts the GD-FB transmission circuit icing online monitoring system produced by Wuhan Guodian Changzheng Electric Equipment Co., Ltd. The monitoring data is sent to the microprocessor.

In the present invention, the control center controls the operation of the automatic ice-melting equipment through the communication module. The communication module is connected with the microprocessor, and is used for transmitting the control command of the control center to the microprocessor, and transmitting the data of the microprocessor to the control center.

The control program of the microprocessor is:

Step 1: Receive commands from the control center through the communication module;

Step 2: Analyze the control center command, whether to start melting ice? Yes, go to step seven; no, go to step three;

Step 3: Analyze the command of the control center, whether to end the ice melting? Yes, go to Step 6; No, go to Step 4;

Step 4: Analyze the command of the control center, whether the switching circuit is controlled by the icing sensing module? Yes, go to Step 5; No, go to Step 1;

Step 5: Determine whether there is ice found by the icing sensor module? No ice: go to the sixth step; with ice, go to the seventh step;

Step 6: Disconnect the switch circuit and enter the first step;

Step 7: Connect the switch circuit and enter the first step.

Claims (8)

1. A self-melting ice-melting equipment for ice-melting conductors, characterized in that: a part of the structure of the conductor itself is used as the self-melting ice-melting conductor (20) of the heating element, and the ice-melting equipment is directly connected to the inner surface of the self-melting ice-melting conductor (20). On the conductor (3) and the outer conductor (1); The self-melting ice conductor (20) is in the form of a coaxial cable, including an outer conductor (1), a heating material (2), and an inner conductor (3); the inner conductor is a cylindrical metal, and the heating material is a heating material with a positive temperature coefficient effect. The material (2) surrounds the outer surface of the inner conductor (3) and completely surrounds the outer circumference of the inner conductor, so that the inner and outer conductors are completely isolated and the short circuit of the inner and outer conductors is avoided; the inner surface of the heating material is in complete contact with the outer surface of the inner conductor, and the outer surface of the heating material and the outer conductor The internal surface is in full contact; the outer conductor is surrounded by the heating material; The inner conductor is a single metal wire or metal stranded wire or a metal tube embedded with optical fiber or a single alloy wire or alloy stranded wire; the outer conductor is a metal tube or alloy tube or metal stranded wire or alloy stranded wire; The automatic ice-melting device is composed of a transformer (18), a switch circuit, a microprocessor (22), a communication module (21), and an icing sensing module (23), and the microprocessor is connected to the communication module, the icing sensing module and the switching circuit, Receive the control signal of the communication module, transmit data to the communication module, and receive the data of the icing sensing module. The control center transmits the control command to the microprocessor through the control of the communication module. The microprocessor responds to the command of the control center and controls the operation of the automatic ice melting equipment. ; When the self-melting ice conductor is used as a non-power transmission line, the automatic ice melting equipment is provided with a first switch circuit (19-1) and a second switch circuit (19-2); the two ends of the power supply are connected to the transformer (18) The primary winding of the transformer, the secondary winding of the transformer is connected to the first switch circuit (19-1), the second switch circuit (19-2), and the two ends of the second switch circuit (19-2) are respectively connected to one end of the secondary winding of the transformer and the self The inner conductor of the ice-melting conductor, the two ends of the first switch circuit (19-1) are respectively connected to the other end of the secondary winding of the transformer and the outer conductor of the self-melting ice conductor; the first switch circuit (19-1), the second switch circuit (19-2) switch state is controlled by microprocessor (22); Inner conductor (3) and outer conductor (1) of self-melting ice conductor (20) are respectively connected to the second switch circuit (19-2) and the first switch circuit (19-1); When the self-melting ice conductor is used as an overhead transmission line conductor, the automatic ice-melting equipment is provided with a switch circuit, the inner conductor (3) of the self-melting ice conductor is connected to one end of the switch circuit, and the outer conductor (1) of the self-melting ice conductor It is connected with the output power of the substation of the overhead transmission line system; in the automatic ice-melting equipment, the outer conductor (1) of the self-melting ice conductor and the ground wire system (25) of the overhead transmission line are respectively connected to both ends of the primary winding of the transformer (18), The two ends of the secondary winding of the transformer are respectively connected to the switching circuit and the ground wire system (25) of the overhead transmission line; the two ends of the switching circuit are respectively connected to one end of the secondary winding of the transformer (18) and the inner conductor (3) of the self-melting ice conductor; the switching circuit Accept microprocessor control; When the self-melting ice conductor is used as an overhead ground wire of an overhead power transmission line, the automatic ice-melting equipment is provided with a switching circuit, the inner conductor (3) of the self-melting ice conductor is connected to one end of the switching circuit, and the outer conductor (1) of the self-melting ice conductor is connected to one end of the switching circuit. ) is connected to the ground wire system of the overhead power transmission line; in the automatic ice-melting equipment, the outer conductor (1) of the self-melting ice conductor and the conductor (26) of the overhead power transmission line are respectively connected to both ends of the primary winding of the transformer (18). When the transmission line conductor adopts the self-melting ice conductor, the primary winding is connected to the outer conductor of the overhead transmission line conductor (26); the two ends of the secondary winding of the transformer (18) are respectively connected to the switching circuit and the outer conductor of the self-melting ice conductor (1 ); the two ends of the switch circuit are respectively connected to one end of the secondary winding of the transformer (18) and the inner conductor (3) of the self-melting ice conductor; the switch circuit is controlled by a microprocessor; The control program of the microprocessor is: Step 1: Receive commands from the control center through the communication module; Step 2: Analyze the control center command, whether to start melting ice? Yes, go to step 7; No, go to third step; Step 3: Analyze the command of the control center, whether to end the ice melting? Yes, go to Step 6; No, go to Step 6 four steps; Step 4: Analyze the command of the control center, whether the switching circuit is controlled by the icing sensing module? yes, enter Step 5; No, go to Step 1; Step 5: Determine whether there is ice found by the icing sensor module? No ice: go to the sixth step; with ice, go to the seventh step; Step 6: Disconnect the switch circuit and enter the first step; Step 7: Connect the switch circuit and enter the first step. 2. The self-melting ice-melting conductor ice-melting device as claimed in claim 1, characterized in that: when the inner conductor is a single metal wire, the single metal wire is a single steel wire or a single galvanized steel wire or One of a single aluminum-clad steel core wire or a single metal tube with embedded optical fibers; the outer conductor is 6 or 18 metal stranded wires, and the metal stranded wire is 6 or 18 aluminum wire stranded wires or aluminum alloy stranded wires , one of the aluminum clad steel core strands. 3. The ice-melting equipment for self-melting ice conductors as claimed in claim 1, characterized in that: when the inner conductor or outer conductor is a metal strand or an alloy strand, one strand of the metal strand or alloy strand Or multiple strands are replaced by metal tubes embedded with optical fibers. 4. The ice-melting equipment for self-melting ice conductors as claimed in claim 1, characterized in that: when the inner conductor is a metal strand, the metal strand is 7 steel wire strands, galvanized steel wire, aluminum clad One of the steel core wires and metal tubes embedded with optical fibers; the outer conductor is 12 or 24 aluminum wire strands, aluminum alloy strands, aluminum-clad steel core strands, and one of the metal tubes embedded with optical fibers . 5. The ice-melting equipment for self-melting ice-melting conductors as claimed in claim 1, characterized in that: the inner conductor is an aluminum stranded wire designed according to the national standard of the People's Republic of China for aluminum stranded wire and steel-cored aluminum stranded wire GB1179 Or the innermost circle of conductors of aluminum-steel conductors, or the conductors from the inside to the outside, except for the outermost circle of conductors; the outer conductor can be based on the national standard of the People's Republic of China for aluminum strands and aluminum-steel conductors GB1179 All conductors of aluminum stranded conductors or steel-reinforced aluminum stranded conductors of specified design except the inner conductor. 6. The ice-melting equipment of self-melting ice-melting conductor as claimed in claim 1 or 3, it is characterized in that: the metal tube embedded with optical fiber is made of protective metal tube (12), protective filler (13) and optical fiber ( 14-1, 14-2, 14-3, 14-n-1, 14-n), the protective metal tube (12) is outside, and n optical fibers are placed inside, and the protective filler (13 ). 7. The ice-melting equipment of self-melting ice conductor as claimed in claim 1 or 2, is characterized in that: when self-melting ice conductor is used as non-transmission system, the primary winding input voltage of transformer (18) is power supply voltage, and the secondary winding The output voltage of the winding is the working voltage of the heating material; when the self-melting ice conductor is used as the overhead transmission line conductor, the primary winding input voltage of the transformer (18) is the transmission line conductor voltage, and the output voltage of the secondary winding is the transmission line conductor voltage minus The working voltage of the heating material, or the voltage of the conductor of the transmission line plus the working voltage of the heating material; The output voltage is the working voltage of the heating material. 8. The ice-melting equipment of the self-melting ice conductor as claimed in claim 1, characterized in that: the distribution of the heating material in the self-melting ice conductor (20) in the coaxial cable adopts intermittent distribution, and the heating material between the intermittent distribution The spaces are filled with insulating materials (16-1, 16-2, 16-3, 16-4), and the adjacent heating materials are closely connected with the insulating materials without gaps in the middle.

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