CN102227074B - De-icing and anti-freezing system for transmission lines in operation - Google Patents

Abstract

The deicing and anti-freezing system for the power transmission line can utilize the electric energy of the line or the external electric energy to deice and freeze the wires and the insulators when the line normally runs. The deicing and anti-freezing system for the power transmission line in operation comprises: the split type power transmission sub-circuit is divided into one to a plurality of sections, and in the junction or the end point of the adjacent conductor sections, the in-phase split conductors are connected in a conducting mode to form split conductor pairs. At the center of the wire segment, each wire pair is connected with an independent current loop, so that current flows through the front and rear wires respectively, and the wires are heated to deice. The deicing and anti-freezing system for the transmission line during operation further comprises a hollow structure with air inlets and air outlets at the upper part and the lower part, hot air generated by an electric heating generator arranged on a tower of the transmission line enters through the air inlets of the insulators and flows out of the air outlets, and therefore the insulators are heated to deice and prevent freezing. The deicing and anti-freezing working range of the insulator and the deicing of the lead are in the same line segment, and the deicing and anti-freezing power supply of the lead are the same power supply.

Description

De-icing and anti-freezing system for transmission lines in operation

technical field

The invention relates to the field of power systems, in particular to a deicing and antifreezing system for conductors in transit and an insulator in transit for deicing and antifreezing systems in power transmission lines.

Background technique

At present, most of the transmission lines in the world, especially ultra-high voltage lines, are overhead. However, when the overhead transmission line encounters a special ice and snow disaster, the ice and snow will seriously wrap the wires and insulators and damage the line or make the line short-circuited and unable to operate, which will bring huge or even devastating damage to the power grid.

In order to deal with the occurrence of the above-mentioned disasters, traditional deicing methods include the following methods:

1) Use manual or mechanical methods to de-ice the wires. This method is not only extremely inefficient and easy to damage the circuit, but also must be carried out in a power outage.

2) Use a short circuit at one end of the line, and pass a large current at the other end to make the wire heat and deicing. Although this kind of mode is feasible on the line with less capacity and shorter lines, it has the following disadvantages: (A) the deicing line must be powered off, which will have a great impact on people's production and life; (B) For large-capacity and long-distance transmission lines, it is difficult to realize deicing by this method. Because the deicing power of the whole line of this type of line is extremely amazing, the deicing power of a line of 100 kilometers can reach hundreds of thousands of kilowatts.

For ultra-high voltage lines, even if the ice and snow on the conductors are removed, the ice and snow on the insulators may still short-circuit the lines and fail to operate.

Considering that the current transmission lines above 110 kV in my country basically use split conductors, it is also easy to implement split conductors for high-voltage and low-voltage lines below 110 kV. Therefore, the in-service deicing and antifreezing system can be designed for split overhead transmission lines.

Contents of the invention

The aim of the present invention is to solve the drawbacks of the prior art.

The first object of the present invention is to propose a deicing and antifreezing system for conductors in transit in transmission lines that is suitable for split high/low voltage overhead transmission lines and has high deicing efficiency.

The second object of the present invention is to propose a deicing and antifreezing system for insulators in power transmission lines.

In order to achieve the above purpose, the embodiment of the first aspect of the present invention proposes a deicing and antifreezing system for conductors in transmission lines, including: a split transmission line, the split transmission line includes one or more conductor segments, wherein , connecting the same-phase split wires of the split transmission line in each wire segment at the junction or end point of the adjacent wire segments to form a split wire pair, wherein each split wire pair forms a loop; and deicing The deicing device obtains electric energy from the split power transmission line or dedicated power supply line and converts it into an independent power supply to supply power to the loop formed by each split wire pair in the wire segment.

According to the deicing and antifreezing system for the wires in the transmission line in the embodiment of the present invention, the normal operation of the transmission line can be maintained when the transmission line is deiced, and the production and life of people will not be affected. By segmenting the split transmission line , can achieve deicing at different times, thereby reducing the deicing power of the entire transmission line, and has the characteristics of high deicing efficiency and wide application range. The deicing and antifreezing system for conducting wires in transmission lines provided by the invention is applicable to all split high/low voltage overhead transmission lines.

In one embodiment of the present invention, the independent power supply is connected to each split wire pair at the center of the wire segment.

In one embodiment of the present invention, when the split power transmission line is an AC power transmission line, the deicing device includes: a first load switch, the input end of the first load switch is connected to the AC power transmission line a first three-phase transformer, the input end of the first three-phase transformer is connected to the output end of the first load switch, and the first three-phase transformer converts the alternating current input by the first load switch into three an independent single-phase power supply; and a first switch set including three connection switches that respectively split the three independent single-phase power supplies from each of the conductor segments The wires are connected to the loop power supply formed by the pair.

Therefore, the input end of the three-phase transformer is powered by the split transmission line, and the output end of the three-phase transformer is connected to each split wire pair, so that the current forms a loop through the front and rear halves, so that the wire is heated rapidly and deiced.

In one embodiment of the present invention, when the split power transmission line is an AC transmission line, the deicing device includes: a second load switch, the input end of the second load switch is connected to the AC transmission line ; The first single-phase transformer group, the first single-phase transformer group includes three single-phase transformers, the input ends of the three single-phase transformers are respectively connected to the output ends of the second load switch, and the first A single-phase transformer group converts the alternating current input by the second load switch into three independent single-phase power sources; and a second switch group, the second switch group includes three connection switches, and the three connection switches respectively connect The three independent single-phase power sources are connected to the loop power supply formed by each split wire pair of the wire segment.

Therefore, the input ends of the three single-phase transformers are powered by the split transmission line, and the output ends of the single-phase transformers are connected to each split wire pair, so that the current forms a loop through the front and rear halves, so that the wires are heated rapidly and deiced.

In one embodiment of the present invention, when the split power transmission line is an AC power transmission line, the deicing device includes: a third load switch, the input end of the third load switch is connected to the AC power transmission line ; A second three-phase transformer, the input end of the second three-phase transformer is connected to the output end of the third load switch, and the second three-phase transformer converts the alternating current input by the third load switch into a three-phase Power supply; a first three-phase bridge rectifier unit, the input end of the first three-phase bridge rectifier unit is connected to the output end of the second three-phase transformer, and the first three-phase bridge rectifier unit connects the The three-phase power supply is rectified into a DC power supply; and a first multi-way switch, the input end of the first multi-way switch is connected to the output end of the first three-phase bridge rectifier unit, and the first multi-way switch A switch connects the DC power supply in turn to the loop power supply formed by each split wire pair of the wire segment.

Therefore, the input end of the three-phase transformer is powered by the split transmission line, and the output end of the three-phase transformer is connected to each split wire pair in turn through the three-phase bridge rectifier unit, so that the current forms a loop through the front and rear halves, so that the wire Rapid heating and deicing.

In one embodiment of the present invention, when the split power transmission line is an AC transmission line, the deicing device includes: a fourth load switch, the input end of the fourth load switch is connected to the AC transmission line ; The second single-phase transformer group, the second single-phase transformer group includes three single-phase transformers, the input terminals of the three single-phase transformers are respectively connected to the output terminals of the fourth load switch, and the second The single-phase transformer group converts the alternating current input by the fourth load switch into a three-phase power supply; the second three-phase bridge rectifier unit, the input end of the second three-phase bridge rectifier unit is connected to the three single-phase transformers connected to the output terminals, the second three-phase bridge rectifier unit respectively rectifies the three-phase power supply into a DC power supply; and a second multiplexer, the input terminal of the second multiplexer is connected to the first The output ends of the two-phase and three-phase bridge rectifier units are connected, and the second multi-way switch connects the DC power supply in turn to the loop power supply formed by each split wire pair of the wire segment.

Thus, the input ends of the three single-phase transformers are powered by the split transmission line, and the output ends of the three single-phase transformers are connected to each split wire pair in turn through the three-phase bridge rectifier unit, so that the current forms a loop through the front and rear halves. , so that the wire quickly heats up and de-ices.

In one embodiment of the present invention, when the split power transmission line is a direct current transmission line, the deicing device includes: a fifth load switch, the input end of the fifth load switch is connected to the direct current transmission line ; the first converter, the input end of the first converter is connected to the output end of the fifth load switch, and the first converter converts the DC power inputted by the fifth load switch into AC power supply; a first single-phase transformer, the input terminal of the first single-phase transformer is connected to the output terminal of the first converter, and the first single-phase transformer converts the AC power supply into two independent single-phase transformers phase power supply; and a third switch group, the third switch group includes two connection switches, the two connection switches respectively connect the two independent single-phase power supplies with each split wire pair of the wire segment The formed loop power supply is connected.

Therefore, the input end of the single-phase transformer is powered by the split transmission line through the converter, and the output end of the single-phase transformer is connected to each split wire pair, so that the current forms a loop through the front and rear halves, so that the wire quickly heats up and is eliminated. ice.

In one embodiment of the present invention, when the split power transmission line is a direct current transmission line, the deicing device includes: a sixth load switch, the input end of the sixth load switch is connected to the direct current transmission line ; the second converter, the input terminal of the second converter is connected to the output terminal of the sixth load switch, and the second converter converts the DC power inputted by the sixth load switch into AC a power supply; a second single-phase transformer, the input of the second single-phase transformer is connected to the output of the second inverter, and the second single-phase transformer converts the AC power into a single-phase power; and The third multi-way switch, the input end of the third multi-way switch is connected to the output end of the second single-phase transformer, and the third multi-way switch connects the single-phase power supply to the wire in turn Each split conductor of the segment is connected to the loop power formed by the pair.

Therefore, the input end of the single-phase transformer is powered by the split transmission line through the converter, and the output end of the single-phase transformer is connected to each split wire pair in turn, so that the current forms a loop through the front and rear halves, so that the wire quickly heats up and dies. deicing.

The embodiment of the second aspect of the present invention proposes a deicing and antifreezing system for insulators in power transmission lines, including: an insulator, the insulator is hollow inside, and one end of the insulator is provided with an air inlet, and the other end of the insulator One end is provided with an exhaust port; an electric hot gas generator, the gas outlet of the electric hot gas generator is connected to the insulator inlet; an antifreeze power transformer, the antifreeze power transformer is powered by the transmission line or a dedicated power supply line; and a power supply circuit , the input end of the power supply circuit is connected with the output end of the antifreeze power transformer; and the control loop, the input end of the control circuit is connected with the output end of the antifreeze power transformer; and the generator switch and the self-deicing switch; The output end of the power supply circuit is connected to the electric heating gas generator through the normally open contact of the generator switch, the end of the power supply circuit is short-circuited to the normally closed contact of the self-deicing switch, and the line of the power supply circuit is erected on the same pole as the transmission line ; The output end of the control loop is connected with the generator switch coil and the self-deicing switch coil.

According to the embodiment of the present invention, the deicing and antifreezing system for the insulators in the transmission line can keep the normal operation of the transmission line when antifreezing the insulators, and will not affect people's production and life, and has the characteristics of high antifreezing efficiency and wide application range .

In one embodiment of the present invention, the electric heating gas generator is installed on each tower of the power transmission line, and the electric heating gas generator includes a blower and an electric heating element.

In one embodiment of the present invention, one of the poles of the control circuit is on the same line as one of the poles of the power supply circuit, and the other pole of the control circuit is connected to the ground wire through a control switch. and other grounding facilities to transmit control current.

In one embodiment of the present invention, the input end of the antifreeze power transformer is the same as the input end of the transformer of the deicing device in the transmission line in the embodiment of the first aspect of the present invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the circuit diagram of deicing and antifreezing system for three phases in an AC transmission line in which the wires in the transmission line are transported according to an embodiment of the present invention;

Fig. 2 is a circuit diagram of deicing and antifreezing system for wires in transmission lines in transit in AC transmission lines in three phases according to an embodiment of the present invention;

Fig. 3 is a circuit diagram of simultaneous deicing of two wires in a direct current transmission line by a deicing and antifreezing system for wires in a transmission line according to an embodiment of the present invention;

Fig. 4 is a circuit diagram of deicing and antifreezing the wires in the transmission line by turns in the direct current transmission line according to an embodiment of the present invention;

5 is a cross-sectional view of a hollow insulator according to an embodiment of the present invention; and

Fig. 6 is a circuit diagram of a deicing and antifreezing system for insulators in power transmission lines according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

The embodiment of the present invention provides a deicing and antifreezing system for conducting wires in a power transmission line, which includes a split power transmission line and a deicing device connected to the split power transmission line.

When the split transmission line is in normal operation, the split transmission line is deiced in sections. Specifically, the split transmission line can include one or more conductor segments, wherein the length of each conductor segment is set according to the scale of power transmission (low-voltage lines can be hundreds of meters to several kilometers, and high-voltage lines can be several kilometers to several kilometers). hundred kilometers). The same-phase split wires of the split transmission line in each wire segment are connected at the junction or end point of adjacent wire segments to form split wire pairs, and each split wire pair forms a loop. In an embodiment of the present invention, the junction of adjacent conductor segments may be the position where the insulators of the towers hang the conductors. At the position where the insulators of other pole towers hang the wires in each wire segment, the split wires are insulated from each other, and the wire supports are also made of insulating materials.

The de-icing device obtains electric energy from the split transmission line or the dedicated power supply line and converts it into an independent power supply to supply power to the loop formed by each split pair of wires in the wire segment. In one embodiment of the present invention, the independent power supply is connected to each split wire pair at the center of the wire segment.

In one embodiment of the invention, the deicing device comprises a transformer. The input end of the transformer is powered by a split transmission line, the output end outputs an independent power supply, and the output ends are respectively connected to the center of the wire segment, so that the current forms a loop through the front and rear halves, so that the wire quickly heats up and deicing.

The following describes the circuit diagrams of the deicing and antifreezing system for the wires in the transmission line when the split transmission line is an AC transmission line and a DC transmission line with reference to FIGS. 1 to 4 .

When the split transmission line SD is an AC transmission line, the deicing and antifreezing system for the conductors in the transmission line in the embodiment of the present invention can adopt one of the following two structures to deice the three-phase split conductor pairs:

1) The de-icing device adopts a three-phase transformer or three single-phase transformers to simultaneously de-ice the three-phase split wire pairs, as shown in Figure 1;

2) The deicing device uses a three-phase transformer or three single-phase transformers, a three-phase bridge rectifier unit and a multi-way switch to deicing the three-phase split conductor pairs in turn, as shown in Figure 2.

As shown in FIG. 1 , point L is the connection point between a wire segment and the wire segment before and after it. At point L, the split wires of the same phase are electrically connected to each other to form a split wire pair. The deicing device includes a first load switch FK0, a first three-phase transformer CB0 and a first switch group (LKa0, LKb0 and LKc0).

The input end of the first load switch FK0 is connected to the AC transmission line SD, and the output end is connected to the input end of the first three-phase transformer CB0. The first three-phase transformer CB0 converts the alternating current input by the first load switch FK0 into three independent single phase power supply. The output terminal of the first three-phase transformer CB0 is connected to the first switch group (LKa0, LKb0 and LKc0). Wherein, the first switch group includes three connection switches, and the above three connection switches respectively connect three independent single-phase power supplies to each split wire pair (split wire pair a, split wire pair b, and split wire pair c ) formed by the loop power supply connected. A current loop is formed between each split conductor pair and the first three-phase transformer CB0, so that the three-phase split conductor pairs are simultaneously deiced.

In one embodiment of the present invention, the deicing device includes a second load switch, a first single-phase transformer group and a second switch group.

The input end of the second load switch is connected with the AC transmission line, and the output end is connected with the input end of the first single-phase transformer group. The first single-phase transformer group includes three single-phase transformers, and the input terminals of the three single-phase transformers are respectively connected with the output terminals of the second load switch. The first single-phase transformer group transforms the alternating current input by the second load switch into three independent single-phase power supplies. The output terminal of the first single-phase transformer group is connected with the second switch group. Wherein, the second switch group includes three connection switches, and the above three connection switches respectively connect three independent single-phase power sources with the loop power supply formed by each split wire pair of the wire segment. A current loop is formed between each split conductor pair and the first single-phase transformer set, thereby simultaneously deicing the three-phase split conductor pairs.

As shown in FIG. 2 , point L is the connection point between a wire segment and the wire segment before and after it. At point L, the split wires in the same phase are electrically connected to each other to form split wire pairs (split wire pair a, split wire pair b, and split wire pair c). The deicing device includes a third load switch FK1, a second three-phase transformer CB1, a first three-phase bridge rectifier unit D, and a first multiplex switch DQK1.

The input end of the third load switch FK1 is connected to the AC transmission line SD, and the output end is connected to the input end of the second three-phase transformer CB1. The second three-phase transformer CB1 converts the AC power input by the third load switch FK1 into a three-phase power supply. The output end of the second three-phase transformer CB1 is connected to the input end of the first three-phase bridge rectifier unit D, and the first three-phase bridge rectifier unit D rectifies the three-phase power outputted by the second three-phase transformer CB1 into DC power. In an embodiment of the present invention, the three-phase bridge rectifier unit D may be composed of rectifier diodes.

The output end of the first three-phase bridge rectifier unit D is connected to the input end of the first multi-way switch DQK, and the output ends of the first multi-way switch DQK are respectively connected to the center positions of the wire segments of the three-phase split wire pairs. . The first multi-way switch DQK connects the DC power output of the first three-phase bridge rectifier unit DQK in turn to the loop power supply formed by each split wire pair of the wire segment, thereby connecting the first three-phase bridge rectifier unit DQK The rectified DC power is sent to the three-phase split wire pairs in turn, forming a current loop between each split wire pair and the second three-phase transformer CB1, and deicing each split wire pair in turn.

In one embodiment of the present invention, the deicing device includes a fourth load switch, a second single-phase transformer group, a second three-phase bridge rectifier unit and a second multi-way switch.

The input end of the fourth load switch is connected to the AC transmission line, and the output end is connected to the input end of the second single-phase transformer group. The second single-phase transformer group includes three single-phase transformers, and the input end of each single-phase transformer is respectively connected with the output end of the fourth load switch. The second single-phase transformer group converts the AC power input by the fourth load switch into a three-phase power supply. The output terminals of the three single-phase transformers are connected to the input terminals of the second three-phase bridge rectifier unit, and the second three-phase bridge rectifier unit rectifies the three-phase power outputted by the second single-phase transformer group into DC power. In an embodiment of the present invention, the second three-phase bridge rectifier unit may be composed of rectifier diodes.

The output end of the second three-phase bridge rectifier unit is connected to the input end of the second multi-way switch, and the output ends of the second multi-way switch are respectively connected to the center positions of the wire segments of the three-phase split wire pairs. The second multi-way switch connects the DC power output of the second three-phase bridge rectifier unit to the loop power supply formed by each split wire pair of the wire segment in turn, so that the rectified power of the second three-phase bridge rectifier unit is The DC power is sent to the three-phase split conductor pairs in turn, and a current loop is formed between each split conductor pair and the second single-phase transformer group, and each split conductor pair is deiced in turn. The deicing power is concentrated for each split wire pair in turn, so that the segment length of each wire segment can be increased and the number of wire segments can be reduced.

In one embodiment of the present invention, the input ends of the first three-phase transformer CB0 and the second three-phase transformer CB1 can be connected with the split power transmission line SD and receive power from the power transmission line SD, and can also be connected with a dedicated power supply line to be powered by the dedicated power supply line.

In one embodiment of the present invention, the input terminals of the first single-phase transformer group and the second single-phase transformer group can be connected with the split transmission line SD and receive the power supply of the transmission line SD, and can also be connected with a dedicated power supply line to be powered by the dedicated power supply line.

When the split transmission line SD is a DC transmission line, the deicing and antifreezing system for the conductors in the transmission line in the embodiment of the present invention can adopt one of the following two structures to deice each split conductor pair:

1) The deicing device uses a converter and a single-phase transformer to simultaneously deicing each split wire pair, as shown in Figure 3;

2) The deicing device adopts a converter, a single-phase transformer and the third multi-way switch DQK2 to deicing each split wire pair in turn, as shown in Fig. 4 .

As shown in FIG. 3 , point L is the connection point between a wire segment and the wire segments before and after it. At point L, the split wires of the same phase are conductively connected to each other to form a split wire pair. The deicing device includes a fifth load switch FK2, a first converter ZHJ1, a first single-phase transformer CB2 and a third switch group.

The input end of the fifth load switch FK2 is connected to the DC transmission line SD, and the output end is connected to the input end of the first converter ZHJ1. The first converter ZHJ1 converts the DC power output by the fifth load switch FK2 into AC power. The input end of the first single-phase transformer CB2 is connected with the output end of the first converter ZHJ1, and the first single-phase transformer CB2 converts the AC power into two independent single-phase power sources. The output terminal of the first single-phase transformer CB2 is connected to the input terminal of the third switch group, which includes two connection switches (LKa1, LKb1). Two connection switches (LKa1, LKb1) respectively connect two independent single-phase power supplies to the loop power supply formed by each split wire pair (split wire pair A and split wire pair B) of the wire segment, so that each split wire A single-phase current loop is formed between the conductor pair and the first single-phase transformer CB2, thereby deicing each split conductor pair simultaneously.

As shown in FIG. 4 , point L is the connection point between a wire segment and the wire segment before and after it. At point L, the split wires of the same phase are conductively connected to each other to form a split wire pair. The deicing device includes a sixth load switch, a second converter, a second single-phase transformer and a third multiplex switch.

The input end of the sixth load switch FK3 is connected to the DC transmission line SD, and the output end is connected to the input end of the second converter ZHJ2. The second converter ZHJ2 converts the DC power outputted by the sixth load switch FK3 into AC power. The input terminal of the second single-phase transformer CB3 is connected with the output terminal of the second converter ZHJ2, and the second single-phase transformer CB3 converts the AC power into a single-phase power supply. The output end of the second single-phase transformer CB3 is connected with the input end of the third multi-way switch DQK2, and the third multi-way switch DQK2 turns the single-phase power supply to each split wire pair of the wire segment (split wire pair A and split wire pair A and split wire pair A). The loop power supply connection formed by the wire pair B) is used to form a single-phase current loop between each split wire pair and the second single-phase transformer CB3, and to de-ice each split wire pair in turn. Due to the concentration of power for deicing each split wire pair in turn, the segment length of each wire segment can be increased and the number of wire segments can be reduced.

According to the embodiment of the present invention, the deicing and antifreezing system for the conductors in the transmission line is used to deicing and antifreeze the conductor section of the transmission line, and can maintain the normal operation of the transmission line when the transmission line is deiced, without affecting people's production and life. , By segmenting the split transmission line, deicing can be realized at different times, thereby reducing the deicing power of the entire transmission line, and it has the characteristics of high deicing efficiency and wide application range. The deicing and antifreezing system for conductors in transmission lines in the embodiment of the present invention is suitable for deicing and antifreezing conductors of all split high/low voltage overhead transmission lines.

The following describes in detail the deicing and antifreezing system for insulators in power transmission lines according to an embodiment of the present invention with reference to FIG. 5 and FIG. 6 .

The embodiment of the present invention provides an insulator in-transit deicing and antifreezing system for power transmission lines, which includes insulators JYZ, electric heating gas generators (DRQ1-DRQn), antifreezing power transformer FB, power supply loops, control loops, multiple sets of generator switches, automatic De-icing switch. Each group of generator switches includes generator switch coils (C1~Cn) and corresponding normally open contacts (C1'~Cn'), and self-deicing switches include self-deicing switch coils CD and normally closed contacts CD'.

The gas outlets of the electric hot gas generators (DRQ1-DRQn) are connected with the inlets of the insulators. Among them, the electric heating gas generators (DRQ1-DRQn) are installed on each tower of the power transmission line. The electric heat generator includes a blower and an electric heating element.

Fig. 5 shows the insulator JYZ. The interior of the insulator JYZ is hollow, an air inlet J is provided at one end of the insulator JYZ, and an exhaust port P is provided at the other end of the insulator JYZ. In one embodiment of the present invention, the air inlet can be arranged at the upper end of the insulator JYZ, and the air outlet can be arranged at the lower end of the insulator JYZ.

The FB input terminal of the antifreeze power transformer and the wire in the transmission line are in the same power supply as the input terminal of the deicing transformer of the deicing and antifreezing system. The FB output terminal of the antifreeze power transformer is connected to a control loop and a power supply loop. One pole of each of the two loops shares a common line H, and the other pole of the control loop is connected to the grounding line JDX through the control switch KK, and the current signal is transmitted by the earth or the lightning protection line. . The other pole of the power supply circuit is connected to the working line G through the power supply switch GK. The common line H and the working line G are set on the same tower as the transmission line, and provide power to the electric heating gas generators (DRQ1~DRQn) installed on each tower. The input terminals of each electric hot gas generator (DRQ1~DRQn) are connected to the common line H and the working line G of the power supply circuit through the normally open contacts (C1'~Cn') of the generator switch. The normally closed contact CD' of the self-deicing switch is connected to the ends of the utility line H and the working line G of the power supply circuit. Each generator switch coil (C1~Cn) and the coil CD of the self-deicing switch are connected to the common line H of the control circuit and the ground line JDX. The gas outlets of each electric hot gas generator (DRQ1-DRQn) are connected with the gas inlet J of the insulator JYZ.

The following describes the working process of the insulator in the deicing and antifreezing system.

When the control switch KK and the power supply switch GK are turned on at the same time, the coils (C1~Cn) of each generator switch and the coil CD of the self-deicing switch are closed, and the normally open contacts (C1'~Cn' of each generator switch ) is turned on, and each electric heating gas generator (DRQ1 ~ DRQn) starts to work. At this time, the electric hot gas generator (DRQ1～DRQn) generates hot gas, and sends the hot gas to the inlet J of the insulator JYZ, and discharges it through the exhaust port P, and at the same time, the normally closed contact CD' of the deicing switch is disconnected . When the control switch KK is disconnected and the control circuit is powered off, all generator switch coils (C1~Cn) and self-deicing switch coil CD are released, and the normally open contacts (C1'~Cn') of the generator switch are disconnected , and the normally closed contact CD' of the self-deicing switch at the end of the working line G and the common line H is connected, thus short-circuiting the power supply circuit and rapidly heating to de-ice itself. When the control switch KK and the power supply switch GK are turned off at the same time, the electric hot gas generators (DRQ1-DRQn) and the self-deicing power supply circuit both stop running.

The deicing and antifreezing system of the insulator and the wires in the transmission line are within the same line segment, and the input end of the antifreezing power transformer and the wire in the transmission line are at the input end of the deicing transformer of the deicing and antifreezing system. Same power supply.

According to the embodiment of the present invention, the deicing and antifreezing system for the insulators in the transmission line can keep the normal operation of the transmission line when the insulator JYZ is antifreezing, and will not affect people's production and life, and has good deicing and antifreezing effects and a wide range of applications. specialty.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (2)

1. A deicing and antifreezing system for conductors in transmission lines, characterized in that it comprises: A split transmission line, the split transmission line includes a plurality of conductor segments, wherein the same-phase split conductors of the split transmission line in each conductor segment are connected at the junctions or endpoints of adjacent conductor segments, form split pairs, each of which forms a loop; and Deicing device, the deicing device obtains electrical energy from the split transmission line or dedicated power supply line and converts it into an independent power supply, and supplies power to the loop formed by each split wire pair in the wire segment, wherein, When the split transmission line is an AC transmission line, the deicing device includes: A first load switch, the input end of the first load switch is connected to the AC transmission line; A first three-phase transformer, the input terminal of the first three-phase transformer is connected to the output terminal of the first load switch, and the first three-phase transformer converts the AC input from the first load switch into three independent single-phase power supply; and A first switch group, the first switch group includes three connection switches, and the three connection switches respectively supply power to the loop formed by the three independent single-phase power sources and each split wire pair of the wire segment connected. the 2 . The deicing and antifreezing system for wires in transmission lines according to claim 1 , wherein the independent power supply is connected to each split wire pair at the center of the wire segment. 3 . the

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