CN105703298A - Single-loop transmission line integrated inter-phase damper spacer - Google Patents

Abstract

The invention relates to an integrated phase-to-phase damping spacer rod for a single-circuit transmission line. The purpose is to provide transmission line interphase damping spacers that can reduce the vibration amplitude of conductor deicing jumps, weaken the adverse dynamic effects of conductor deicing jumps on fittings and towers, and effectively prevent deicing flashover accidents. The technical solution is: an integrated phase-to-phase damping spacer for a single-circuit transmission line, which is characterized in that the interphase damping spacer includes three composite insulators whose one ends are respectively connected to the three conductors one by one, and the other ends of the three composite insulators are connected to each other. The damper; the composite insulator includes a composite material mandrel, a silicone rubber shed string that is sheathed on the composite material mandrel, a metal clamp that connects one end of the composite material mandrel to the wire, and two Aluminum alloy pressure equalizing rings fixed on the composite mandrel and against the two ends of the silicone rubber shed string.

Description

An integrated phase-to-phase damping spacer bar for single-circuit transmission lines

technical field

The present invention relates to a single-circuit integrated transmission line phase-to-phase damping spacer bar for suppressing deicing and jumping of conductors, more specifically, a phase-to-phase spacer bar with a damper, which is installed on each phase conductor of a transmission line in a heavy ice area between, thereby inhibiting the wire from deicing and jumping.

Background technique

Electric energy is an important material basis for human survival and development, and a favorable guarantee for the sustained and rapid development of the country's economic society. The high-voltage transmission line system is an important lifeline project in the power grid, and its safety is directly related to the realization of the normal function of the power system, which is the primary goal of the power transmission system design.

Due to the characteristics of high tower structure, large span of ground wire, and wide passage area, high-voltage transmission lines cannot completely avoid areas covered with ice when passing through multiple weather conditions. Rain, snow and freezing disaster weather will cause severe icing of transmission lines, resulting in a sharp decline in mechanical and electrical performance of transmission lines, resulting in icing accidents.

The causes of icing accidents on transmission lines include uniform and uneven icing on the ground wire, jumping off the ice, broken wires on the ground wire, and icing dancing on the ground wire. Among them, deicing and jumping of conductors is one of the main causes of transmission line flashover accidents and tower collapse accidents. Conductor deicing and jumping is a common phenomenon in transmission lines in ice regions. It refers to the simultaneous or non-synchronous deicing of ice-coated conductors under the influence of temperature rise, natural wind force or vibration percussion, resulting in jumping movement of the conductors. The deicing and jumping of conductors will reduce the gap between the conductors and cause flashover accidents; at the same time, the deicing and jumping of conductors will have a large dynamic impact force on insulator strings, fittings and iron towers, and have a destructive effect on them.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide an integrated phase-to-phase damping spacer rod for single-circuit transmission lines that suppresses deicing and jumping of conductors; , Weaken the adverse dynamic effect of wire deicing and jumping on fittings and towers, and effectively prevent the occurrence of deicing flashover accidents.

The purpose of the present invention is accomplished through the following technical solutions:

An integrated phase-to-phase damping spacer for a single-circuit transmission line, characterized in that the interphase damping spacer includes three composite insulators whose one ends are respectively connected to three conductors in one-to-one correspondence, and a damper connected to the other ends of the three composite insulators; The composite insulator includes a composite material mandrel, a silicone rubber shed string sheathed on the composite material mandrel, a metal clamp connecting one end of the composite material mandrel to the wire, and two wire clamps respectively fixed on the composite material mandrel. The aluminum alloy pressure equalizing rings on the mandrel and against the two ends of the silicone rubber shed string.

The three arms of the damper are radially arranged, and the end of each arm is connected with a composite insulator.

The axes of the three arm rods of the damper are located on the same plane and intersect at the same point, and the distance between any two axes is 120 degrees.

Compared with the prior art, the beneficial effect of the present invention is that by installing interphase spacers with dampers between the wires of the transmission line, the jump height of the wire deicing and the distance of the wire deicing approach can be greatly reduced, and the deicing flash can be effectively prevented occurrence of network accidents. The inter-phase damping spacer can also reduce the dynamic impact force of the wire deicing and jumping on the insulator string, fittings and iron towers, and prevent them from being damaged. At the same time, the damper can effectively reduce the internal force of the interphase spacer rods themselves during jumping off the ice, and prevent them from breaking. Compared with the currently commonly used separated interphase spacer, the integrated interphase spacer has the characteristics of saving materials and being easy to install.

The invention can be widely used in power transmission lines in ice regions.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the installation structure of the present invention.

The labels in the figure are: 1. Interphase damping spacer rod, 2. Lead wire, 3. Silicon rubber shed string, 4. Composite material mandrel, 5. Aluminum alloy pressure equalizing ring, 6. Metal wire clamp, 7. Composite insulator , 8. Damper.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments shown in the accompanying drawings.

The interphase damping spacer bar shown in Figure 1 includes three composite insulators, one end of each composite insulator is connected to the wire, and the other end is connected to the damper; the three arms of the damper are radially arranged, and each arm The ends are connected to a composite insulator. The figure shows that the axes of the three arms of the damper are 120 degrees apart and located on the same plane, and the axis of each arm basically coincides with the axis of the composite insulator to which it is connected.

In the composite insulator, the silicone rubber umbrella skirt is set on the composite material mandrel in series; one end of the composite material mandrel is connected to the wire through a metal wire clamp; two aluminum alloy pressure equalizing rings are respectively fixed on the composite material mandrel. The mandrel is on and against the two ends of the silicone rubber shed string, so as to limit the silicone rubber shed string.

The principle of the present invention is (see Fig. 2): the interphase damping spacer of the transmission line connects the three wires into a whole, when one of the wires jumps off the ice, the other two wires can produce resistance to it, reducing its jump height ; At the same time, the damper can effectively reduce the vibration amplitude of the wire and the internal force of the interphase spacer to prevent the interphase spacer from breaking itself.

Finally, it should be noted that what is listed above is only a specific embodiment of the present invention in a 220 kV single-circuit transmission line in heavy ice regions. Apparently, the present invention is not limited to the above embodiments, and can also be applied to power transmission lines in heavy ice regions with other voltage levels. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims (3)

1. An integrated phase-to-phase damping spacer for a single-circuit transmission line, characterized in that the interphase damping spacer (1) includes three composite insulators (7) connected to three conductors at one end and three composite insulators The damper (8) connected at the other end; the composite insulator includes a composite material mandrel (4), a silicone rubber shed string (3) that is sheathed on the composite material mandrel, and one end of the composite material mandrel A metal wire clip (6) connected with the wire and two aluminum alloy pressure equalizing rings (5) respectively fixed on the composite material mandrel and leaning against the two ends of the silicone rubber shed string. 2. The single-circuit transmission line integrated phase-to-phase damping spacer according to claim 1, characterized in that: the three arms of the damper are radially arranged, and the end of each arm is connected to a composite insulator. 3. The single-circuit transmission line integrated phase-to-phase damping spacer rod according to claim 2, characterized in that: the axes of the three arms of the damper are located on the same plane and intersect at the same point, and between any two axes 120 degrees apart.