CN101604833B - Ground wire deicing device capable of combined use - Google Patents

Abstract

A ground wire deicing device that can be used in combination, comprising a gasoline generator (1), a three-phase constant current control module (2), an adjustment control system (3), a digital voltmeter (4), a digital ammeter (5), A shunt (6) and a winding enameled wire (7) are formed. Wherein the gasoline generator (1) is connected to the input end of the three-phase constant current control module (2). The adjustment control system (3) is connected to the control signal terminal of the three-phase constant current control module (2). Before the overhead ground wire of the transmission line is covered with ice, the enameled wire is wound on the ground wire, and after the ice is covered, it is connected to the ground wire melting device. After the current passes, the ground wire generates heat to melt the ice. When the ice-melting current exceeds 50A, more than two units of this device can be combined and used at the same time. The invention, 1) can melt ice for various types of overhead ground wires; 2) the range of ice melting current can be adjusted; 3) the device can be used in combination; 4) solves the problem of difficult power supply; 5) reduces the risk.

Description

A ground wire ice-melting device that can be used in combination

technical field

The invention belongs to the technical field of electrical engineering, and in particular relates to a ground wire melting device which can be used in combination. The device is suitable for the ice melting treatment of overhead ground wires of power transmission lines, so as to prevent the overhead ground wires of power transmission lines from breaking and falling due to ice coating. Cause faults such as tripping of transmission lines on the conductors.

Background technique

In recent years, due to the impact of freezing disasters, a large number of ground wire disconnection accidents of transmission lines have occurred frequently. For example, in the ice disaster that occurred in Hunan, China in 2008, there were 322 broken ground lines of 500kV transmission lines, 432 broken lines of ground lines of 220kV transmission lines, 1017 broken lines of ground lines of 110kV transmission lines, and 296 broken lines of ground lines of 35kV transmission lines. . The occurrence of the accident, on the one hand, caused the interruption of the communication optical cable of the power grid, and on the other hand, because the ground wire was disconnected and fell on the wire, causing a trip and causing the line to stop operating. At present, Hunan Power Grid has taken a variety of effective measures based on its rich experience in coping with it, such as AC and DC ice-melting treatment for conductors in the way of high-current melting ice. Point grounding, etc., so the use of wire melting method can not effectively implement the ground wire ice melting treatment. Therefore, when the winter freezing period comes, some people untie the grounding ends of all the ground wires to insulate them from the ground. After the ground wires freeze, they directly apply current to melt the ice. This ice-melting method has a heavy workload, it is difficult to obtain ice-melting power, and the distance range of ice-melting is limited.

Contents of the invention

The technical problem to be solved by the present invention is to design a device for melting the ice of the overhead ground wire of the transmission line in view of the defects of the prior art, and use the device to perform ice-melting treatment on the overhead ground wire after ice coating, so as to reduce the on-site operation to avoid grid load shifting. Moreover, deicing personnel do not need to board the overhead ground wire of the transmission line, which greatly reduces the failure rate of the transmission line tripping due to freezing disasters.

The technical solution of the present invention is that the above-mentioned ground wire deicing device that can be used in combination is shown in Fig. 1, which consists of a gasoline generator 1, a three-phase constant current control module 2, an adjustment control system 3, a digital voltmeter 4, and a digital ammeter 5. It is composed of shunt 6 and winding enameled wire 7. Wherein the gasoline generator 1 is electrically connected to the input end of the three-phase constant current control module 2 . The regulation control system 3 is electrically connected to the control signal terminal of the three-phase constant current control module 2 . The digital voltmeter 4 is connected in parallel with the positive pole and the negative pole of the DC output terminal of the three-phase constant current control module 2 . The digital ammeter 5 is connected in parallel with the shunt 6 , and the shunt 6 is connected in series to the positive pole of the output terminal of the three-phase constant current control module 2 . The two ends of the winding enameled wire 7 are electrically connected to the positive pole of the three-phase constant current control module 2 , and the other end is electrically connected to the negative pole of the three-phase constant current control module 2 .

The working principle of the present invention is: before the overhead ground wire of the transmission line is covered with ice, the enameled wire is wound on the ground wire; Form a loop. The ground line ice-melting device is provided with a three-phase AC power supply by a gasoline generator, and the three-phase constant current control module is mainly used to rectify the AC into a DC. After the DC current passes through the enameled wire wound on the overhead ground wire, an eddy current will be generated to make the overhead ground wire generate heat to melt the ice. The adjustment control system 3 can be used to continuously adjust the range of the above ice melting current from 0 to 50A to ensure the output The DC power supply can meet the design requirements, prevent the wires from being burnt by the high current, and prevent the ice on the wires from melting when the current is too low.

When the ice-melting current of the ground wire that needs to melt the ice exceeds 50A, more than two such ground wire ice-melting devices that can be used in combination can be combined to use at the same time. The positive pole/negative pole of the three-phase constant current control module 2 of one device can be correspondingly connected with the positive pole/negative pole of the three-phase constant current control module 2 of another device.

The beneficial effects of the present invention are:

1) DC deicing treatment can be performed on various types of overhead ground wires after winding enameled wires;

2), the range of DC ice melting current is continuously adjustable from 0 to 100A;

3) The device can be combined and used in parallel to meet the needs of different lengths of transmission lines for ice melting;

4) Solved the problem of difficulty in obtaining power in the traditional ice-melting method, and reduced the cumbersome work required to insulate the overhead ground wire to the ground through the gasoline generator for power supply;

5) There is no need to climb the tower manually, which greatly reduces the possible safety risks.

Description of drawings

Fig. 1 is a structural block diagram of a specific embodiment of a ground wire deicing device that can be used in combination;

Fig. 2 is a circuit reference diagram of the combined use state of two devices.

The labels in Figures 1 to 2 above are:

1- gasoline generator,

2-Three-phase constant current control module,

3- Regulatory control system,

4-digital voltmeter,

5-digital ammeter,

6- shunt,

7- Winding enameled wire.

Detailed ways

Embodiment 1: The ground wire deicing device that can be used in combination in this embodiment of the present invention, referring to Fig. 1, its gasoline generator 1 adopts the BVT-3000A type generator produced by Taiyang Electric Manufacturing Co., Ltd. of Japan TAIYO Co., Ltd., rated power 22.0kVA, maximum output power 22.5VKA, power factor 0.8, frequency 50HZ, rated voltage 220/380V, rated current 30.3A, speed 3000 rpm; three-phase constant current control module 2 adopts MSJ from China Zibo Yinhe High Technology Development Co., Ltd. -HL-250 constant current control module; adjustment control system 3 adopts HYKZ-0820A control circuit board developed by China Hunan Huicui Electric Power Technology Co., Ltd.; digital voltmeter 4 adopts XL5235V-2 digital voltmeter from Shaanxi Xieli Electronics Co., Ltd.; The digital ammeter 5 adopts the XL5235A-1 digital ammeter of Shaanxi Xieli Electronics Co., Ltd.; the shunt 6 adopts the FL-275mV200A DC shunt of Shanghai Jiangbai Electronic Technology Co., Ltd.; the winding enameled wire 7 adopts the WRP- 2.5. Wrapped enameled wire with a specification of 6×2.5mm ² . The gasoline generator 1, the three-phase constant current control module 2, the regulation control system 3, the digital voltmeter 4, the digital ammeter 5, the shunt 6 and the winding enameled wire 7 are formed according to the technical solution and the circuit connection shown in Fig. 1 . That is, the gasoline generator 1 is connected to the input terminal of the three-phase constant current control module 2 . The adjustment control system 3 is connected to the control signal terminal of the three-phase constant current control module 2 . The digital voltmeter 4 is connected in parallel with the positive pole and the negative pole of the DC output terminal of the three-phase constant current control module 2 . The shunt 6 is connected in series to the positive pole of the output terminal of the three-phase constant current control module 2 , and the digital ammeter 5 is connected in parallel with the shunt 6 . Both ends of the winding enameled wire 7 are respectively connected to the positive and negative poles of the DC output terminal of the three-phase constant current control module 2 . The embodiment thus constituted adjusts the magnitude of the output DC current by adjusting the control system 2; the digital ammeter 5 displays the magnitude of the DC output current; the digital voltmeter 4 displays the magnitude of the DC output voltage.

Embodiment 2: The gasoline generator 1, the three-phase constant current control module 2, the adjustment control system 3, the digital voltmeter 4, the digital ammeter 5, the shunt 6 and the winding enameled wire 7 of this embodiment are drawn from the same materials as in the embodiment 1. The connection relationship between them is also the same as in Embodiment 1. The difference is that in this embodiment, there are two ground wire deicing devices that can be used in combination. Two of these devices are used in combination, and the connection mode is as shown in Figure 2. The connection method is simple, just connect the positive pole/negative pole of one of the three-phase constant current control modules 2 with the positive pole/negative pole of the three-phase constant current control module 2 of another device.

Claims (1)

1. A ground wire deicing device that can be used in combination is characterized in that it consists of a gasoline generator (1), a three-phase constant current control module (2), an adjustment control system (3), and a digital voltmeter (4) , digital ammeter (5), shunt (6) and winding enameled wire (7), wherein the gasoline generator (1) is electrically connected to the input end of the three-phase constant current control module (2), and the adjustment control The system (3) is electrically connected to the control signal terminal of the three-phase constant current control module (2), the digital voltmeter (4) is connected in parallel with the positive pole and the negative pole of the DC output terminal of the three-phase constant current control module (2), and the digital ammeter ( 5) connected in parallel with the shunt (6), and the shunt (6) is connected in series to the positive pole of the output terminal of the three-phase constant current control module (2), the two ends of the winding enameled wire (7), one end The positive pole of the three-phase constant current control module (2) is electrically connected, and the other end is electrically connected with the negative pole of the three-phase constant current control module (2).

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