Power transmission line wind power galloping suppression device and method

Abstract

The invention discloses a power transmission line wind power galloping suppression device and method, belongs to the field of power transmission line control, and aims to solve the problem of potential safety hazards caused by power transmission line galloping. The device comprises a pole tower, a power transmission line, a control unit, a gripper ring and a telescopic strip, a plurality of power transmission lines are erected between the towers, control units are arranged on the towers, the control units are connected with the tail ends of the telescopic strips and control the telescopic strips to stretch out and draw back, and gripper rings are arranged at the head ends of the telescopic strips and arranged on the power transmission lines in a sleeving mode. When the wind power is larger than A, the controller outputs an instruction to control the motor to rotate forwards, control the telescopic strips to synchronously extend and stop walking along the power transmission line by a distance d, and control the gripper ring to be in a gripping state, so that the gripping ring locks shaking of the power transmission line to restrain waving.

Description

Technical Field

[0001] The invention relates to a transmission line galloping suppression technology, belonging to the field of transmission line control. Background Art

[0002] Transmission lines are mostly erected in open areas in the wild, where the wind is strong. The wind will cause the transmission lines to dance. When the conductor dances, one, two or three standing waves or traveling waves with antinodes will be formed in one conductor. The conductor mainly moves vertically, and sometimes elliptical motion, with the major axis of the ellipse in the vertical direction or deviating from the vertical direction, and sometimes accompanied by conductor twisting. The frequency of vertical vibration is about 0.1 to 1 Hz, and the amplitude is between tens of centimeters and several meters. Severe conductor dancing is the vibration of an antinode in the large-span conductor, and the suspension insulator string swings along the line direction. The amplitude can be as high as or even slightly higher than the maximum sag (about 10 to 12 meters).

[0003] Overhead transmission lines often experience fatigue vibrations in four directions: breeze vibration, sub-span oscillation, along-line vibration and dancing. If the vibration amplitude is too large, the transmission lines are prone to failures such as conductor fatigue breakage, hardware wear, and tower component damage, which pose a great threat to line safety. Summary of the invention

[0004] In order to solve the problem that the dancing of power transmission lines may bring potential safety hazards, the present invention provides a device and method for suppressing the wind-driven dancing of power transmission lines.

[0005] In one aspect, the present invention provides a transmission line wind wave suppression device, comprising a tower 1, a transmission line 2, a control unit 3, a grip ring 4 and a telescopic bar 5;

[0006] A plurality of transmission lines 2 are set up between the pole towers 1. A control unit 3 is arranged on the pole tower 1. The control unit 3 is connected to the tail end of the telescopic bar 5 and controls its extension and retraction. A grab ring 4 is arranged at the head end of the telescopic bar 5. The grab ring 4 is sleeved on the transmission line 2.

[0007] Preferably, a signal line is disposed inside the telescopic strip 5 , and the control unit 3 controls the grabbing and releasing actions of the grabbing ring 4 through the signal line.

[0008] Preferably, the grab ring 4 moves forward and backward along the power transmission line, and the distance between the grab ring 4 and the tower 1 is 1 to 3 meters.

[0009] Preferably, the control unit 3 includes a wind sensor, a motor and a processor. The wind signal output end of the wind sensor is connected to the wind signal input end of the processor, the telescopic command output end of the processor is connected to the command input end of the motor, the motor output shaft is connected to the tail end of the telescopic strip 5, and the motor drives the telescopic strip 5 to realize the telescopic action by forward and reverse rotation.

[0010] In another aspect, the present invention provides a method for suppressing wind oscillation of a power transmission line, the method comprising the following steps:

[0011] Step 1: Initialization: the telescopic strip 5 is in the extreme contraction state, and the grip ring 4 is in the release state;

[0012] Step 2: The processor receives the wind signal from the wind sensor. When the wind force is greater than A, step 3 is executed, otherwise step 2 is repeated.

[0013] Step 3: The controller outputs a command to control the motor to rotate forward, controls the several telescopic bars 5 to extend synchronously, stops after traveling a distance △d along the transmission line, and then executes step 4;

[0014] Step 4: Control the grab ring 4 to the grabbing state, so that the grab ring 4 locks the power transmission line 2. The controller controls the motor to perform reverse-forward rotation alternating operations, so that the telescopic bar 5 can achieve a shaking operation of the power transmission line 2 through the grab ring 4, which is used to suppress the dancing of the power transmission line. The shaking time in this step is T. After the shaking ends, execute step 5;

[0015] Step 5: Determine whether the total stroke is greater than 2 meters. If so, control the gripper ring 4 to be released, and then execute step 6; otherwise, execute step 3;

[0016] Step 6: Control the grip ring 4 to be in the released state, and control the motor to reverse to shrink the telescopic strip 5 and return to the initial position.

[0017] Preferably, A is 10 m / s.

[0018] Beneficial effects of the present invention: The present invention provides a simple device. When the wind force is greater than 10m / s, it is considered that the power transmission line is prone to dancing. At this time, the power transmission line is actively shaken within a range of 1-3 meters at the end of the power transmission line. The shaking is used to suppress the dancing phenomenon. Although the dancing cannot be accurately and completely eliminated, it can play a considerable inhibitory role and ensure the safety of the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the transmission line wind sway suppression device of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0023] Specific implementation method 1: The following is combined Figure 1 This embodiment is described. The transmission line wind sway suppression device described in this embodiment includes a tower 1, a transmission line 2, a control unit 3, a grip ring 4 and a telescopic bar 5;

[0024] A plurality of transmission lines 2 are set up between the pole towers 1. A control unit 3 is arranged on the pole tower 1. The control unit 3 is connected to the tail end of the telescopic bar 5 and controls its extension and retraction. A grab ring 4 is arranged at the head end of the telescopic bar 5. The grab ring 4 is sleeved on the transmission line 2.

[0025] A signal line is arranged inside the telescopic strip 5 , and the control unit 3 controls the grabbing and releasing actions of the grabbing ring 4 through the signal line.

[0026] The grab ring 4 moves forward and backward along the power transmission line, and the distance between the grab ring 4 and the tower 1 is 1 to 3 meters.

[0027] The control unit 3 includes a wind sensor, a motor and a processor. The wind signal output end of the wind sensor is connected to the wind signal input end of the processor, the telescopic command output end of the processor is connected to the command input end of the motor, the motor output shaft is connected to the tail end of the telescopic strip 5, and the motor drives the telescopic strip 5 to realize the telescopic action by forward and reverse rotation.

[0028] Specific implementation method 2: The following is combined Figure 1 This embodiment describes the method for suppressing wind oscillation of a power transmission line described in this embodiment, which is implemented based on the device for suppressing wind oscillation of a power transmission line described in the first embodiment. The method comprises the following steps:

[0029] Step 1: Initialization: the telescopic strip 5 is in the extreme contraction state, and the grip ring 4 is in the release state;

[0030] Step 2: The processor receives the wind signal from the wind sensor. When the wind force is greater than A, step 3 is executed, otherwise step 2 is repeated.

[0031] Step 3: The controller outputs a command to control the motor to rotate forward, controls the several telescopic bars 5 to extend synchronously, stops after traveling a distance △d along the transmission line, and then executes step 4;

[0032] Step 4: Control the grab ring 4 to the grabbing state, so that the grab ring 4 locks the power transmission line 2. The controller controls the motor to perform reverse-forward rotation alternating operations, so that the telescopic bar 5 can achieve a shaking operation of the power transmission line 2 through the grab ring 4, which is used to suppress the dancing of the power transmission line. The shaking time in this step is T. After the shaking ends, execute step 5;

[0033] Step 5: Determine whether the total stroke is greater than 2 meters. If so, control the gripper ring 4 to be released, and then execute step 6; otherwise, execute step 3;

[0034] Step 6: Control the grip ring 4 to be in the released state, and control the motor to reverse to shrink the telescopic strip 5 and return to the initial position.

[0035] A is 10m / s.

[0036] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with a single embodiment may be used in other described embodiments.

Claims

1. A device for suppressing wind swaying of a power transmission line, characterized in that: It comprises a pole tower (1), a power transmission line (2), a control unit (3), a grip ring (4) and a telescopic strip (5); A plurality of power transmission lines (2) are erected between pole towers (1), a control unit (3) is arranged on the pole tower (1), the control unit (3) is connected to the tail end of a telescopic bar (5) and controls its telescopic extension, a grip ring (4) is arranged at the head end of the telescopic bar (5), and the grip ring (4) is sleeved on the power transmission line (2).

2. The device for suppressing wind sway of a power transmission line according to claim 1, characterized in that: A signal line is arranged inside the telescopic strip (5), and the control unit (3) controls the grabbing and releasing actions of the grabbing ring (4) through the signal line.

3. The device for suppressing wind sway of a power transmission line according to claim 2, characterized in that: The grab ring (4) moves forward and backward along the power transmission line, and the distance between the grab ring (4) and the pole tower (1) is 1 to 3 meters.

4. The device for suppressing wind sway of a power transmission line according to claim 1, characterized in that: The control unit (3) comprises a wind sensor, a motor and a processor; the wind signal output end of the wind sensor is connected to the wind signal input end of the processor; the extension command output end of the processor is connected to the command input end of the motor; the motor output shaft is connected to the tail end of the extension strip (5); the motor rotates forward and reversely to drive the extension strip (5) to achieve an extension and retraction action.

5. A method for suppressing wind oscillation of a power transmission line, the method being implemented based on the device for suppressing wind oscillation of a power transmission line as claimed in any one of claims 1 to 4, characterized in that: The method comprises the following steps: Step 1: Initialization: the telescopic strip (5) is in the extreme contraction state, and the grip ring (4) is in the release state; Step 2: The processor receives the wind signal from the wind sensor. When the wind force is greater than A, step 3 is executed, otherwise step 2 is repeated. Step 3: The controller outputs instructions to control the motor to rotate forward, control the several telescopic bars (5) to extend synchronously, travel a distance △d along the transmission line and stop, and then execute step 4; Step 4: Control the grab ring (4) to be in the grabbing state, so that the grab ring (4) locks the power transmission line (2), and the controller controls the motor to perform reverse-forward rotation alternating operations, so that the telescopic bar (5) can achieve a shaking operation of the power transmission line (2) through the grab ring (4), so as to suppress the dancing of the power transmission line. The shaking time of this step is T, and step 5 is executed after the shaking ends; Step 5: determine whether the total stroke is greater than 2 meters. If so, control the gripper ring (4) to be released, and then execute step 6; otherwise, execute step 3; Step 6: Control the grip ring (4) to be in a released state, and control the motor to reverse so that the telescopic strip (5) contracts and returns to the initial position.

6. The method for suppressing wind sway of a power transmission line according to claim 5, characterized in that: A is 10m / s.

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