KR-102964267-B1 - Spacer damper apparatus for distribution line

Abstract

The present invention relates to a spacer damper device mounted on a power distribution line, and aims to provide a spacer damper device mounted on a power distribution line that includes a retractable rod coupled with a fixing member for fixing a conductor at its tip, a compression spring that elastically supports the retractable rod in the contraction direction, a retractable fixing means having a solenoid that operates the retractable rod in the extension direction, and a control means that controls the solenoid according to wind speed, so that when wind blows at a wind speed below a set wind speed, the distance between conductors forming a multi-conductor structure is maintained at a standard safety distance, and when strong winds blow, the distance between conductors forming a multi-conductor structure is maintained further than the standard safety distance, thereby reliably preventing short circuits between conductors and safely supporting the multi-conductor structure.

Inventors

• 배종배

Assignees

• (주)태양유니스

Dates

Publication Date

20260513

Application Date

20241122

Claims (2)

1. A spacer damper device mounted on a power distribution line that maintains a safe distance between conductors constituting a multi-conductor, comprising: a spacer body formed in the shape of a regular heptagonal ring at the bottom of the insulator, with the top end of the insulator fixed to an insulator fixing piece fixed to a crossarm of a utility pole and the top end of the spacer body fixed to the bottom end of the insulator; and an expansion fixing means radially installed at the remaining vertices excluding the top vertex of the spacer body and having a multi-conductor fixed at its end, wherein the expansion fixing means comprises a cylinder radially provided with the remaining six vertices excluding the top vertex of the spacer body as bases; an expansion rod inserted into the cylinder; a compression spring installed inside the cylinder to elastically support the expansion rod in the extension direction; a solenoid installed inside the cylinder to actuate the expansion rod in the contraction direction; and a fixing member coupled to the protruding end of the expansion rod to fix the multi-conductor, and further comprising a control means for controlling the solenoid according to wind speed. The cylinder is composed of a cylinder body with a closed base and an open end, and a sealing cap coupled to the end of the cylinder body; a female screw portion is formed on the inner surface of the end portion of the cylinder body; the sealing cap includes a sealing plate that seals the end of the cylinder body, a fastening portion with a male screw portion formed on its outer surface that is fastened to the female screw portion, and a through hole formed in the sealing plate and the fastening portion through which an extension rod passes; the extension rod passes through the through hole of the sealing cap and is equipped with a spring catch piece at its inner end; the compression spring is loaded such that it surrounds the extension rod, with its inner end engaging the spring catch piece and its outer end engaging the sealing cap; the solenoid is composed of a solenoid body inserted into the base portion of the cylinder, and an extendable rod installed to extend and retract from the solenoid body, with its tip contacting the spring catch piece; and the compression spring has an elastic force greater than the component of the force acting horizontally on the conductors constituting the multi-conductor due to strong winds of less than 40 m/s in the direction of the central axis of the force. A spacer damper device mounted on a power distribution line is configured such that when power is not applied to the solenoid body, the extending rod is in a free state with no force in either the forward or backward direction, and when power is applied, a force is applied to advance the extending rod. The solenoid is configured such that the force applied to the extending rod in the extension direction as the extending rod advances is greater than the force applied to the extending rod in the contraction direction by the compression spring. The control means includes a digital anemometer installed on a utility pole to measure the wind speed of the blowing wind and output the wind speed measurement value as a digital signal, and a control unit that receives the wind speed measurement value from the digital anemometer, cuts off power to the solenoid body if the measured value is below a preset wind speed, and supplies power to the solenoid body to cause the extending rod to protrude if the measured value is above the preset wind speed. The device further comprises a power supply unit composed of a solar cell installed on the utility pole to supply power to the digital anemometer, the control unit, and the solenoid.
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Description

Spacer damper apparatus for distribution line The present invention relates to a spacer damper device mounted on a power distribution line among technologies in the field of power distribution, and more specifically, to a spacer damper device mounted on a power distribution line that securely supports a multi-conductor on a utility pole, maintains the distance between the conductors forming the multi-conductor at a standard safety distance when winds below a set wind speed blow, and maintains the distance between the conductors forming the multi-conductor at a distance greater than the standard safety distance when strong winds blow, thereby reliably preventing short circuits between the conductors and safely supporting the multi-conductor. Generally, electricity produced at power plants is distributed at high voltage to minimize power loss and increase distribution capacity during the distribution process. Distribution is the field of supplying electrical energy to end users (power consumers) who ultimately consume it, and the lines used for distribution are called distribution lines. The voltage transmitted through distribution lines is at least 220 volts, and it is generally higher when the scale of the demand site is large-scale apartment complexes, factories, or industrial complexes. Meanwhile, depending on the scale and type of the place where electricity is produced, the type of distribution line, and the type of power consumer, high voltage of 200kV or less, ultra-high voltage of 200kV or more, and ultra-ultra-high voltage of 500kV or more are used; in the case of Korea, high voltage of 154kV, ultra-high voltage of 345kV, and ultra-ultra-high voltage of 765kV are adopted. Distribution lines for distributing such ultra-high voltage or ultra-ultra-high voltage electricity utilize poles that are much more robust and larger than ordinary poles when considering voltage, distribution capacity, and the weight and tension of the distribution cables. In order to prevent the occurrence of fire, stranded wires without insulation are used for these distribution lines (distribution cables). In supporting distribution cables on utility poles, a method is used in which the upper end of a suspension insulator is supported on an arm that extends forward and backward from the upper end of the utility pole, and the distribution cable is fixed to the lower end of the suspension insulator. Utility poles for ultra-high voltage distribution have an average height of 60m and an average span (distance between poles) of 450m, and utility poles for 765kV ultra-high voltage distribution have an average height of 100m (maximum 148m, average 120m between Miryang/Uljin and Sintaebaek), and an average span of 500m (maximum 880m). As such, since power distribution cables are installed at high altitudes, when strong winds such as typhoons blow, strong pressure is exerted on the power distribution cables and the suspension insulators supporting the power distribution cables on the utility poles, raising concerns that the support of the power distribution cables may become unstable. Korean Registered Patent No. 10-2033581 (October 11, 2019), "Structure of a steel tower for fixing overhead transmission and distribution lines," which is a prior art for resolving these issues, discloses a technology that allows a wire sagging prevention unit to be installed on one side of a suspension insulator so that the line can be safely maintained even when strong winds such as typhoons blow, and also allows the extra-high voltage line to be safely maintained by responding to changes in wire tension. However, the wire sagging prevention unit is equipped with an insulating gripper that supports the transmission and distribution line, formed in a semicircular shape with an open top at the bottom of a protruding guide protruding from an extension frame fixed to a steel tower, and is designed to allow tension adjustment and sagging prevention by raising and lowering this insulating gripper; however, there is a problem in that the transmission and distribution line cannot be safely supported when the line vibrates in the forward and backward directions due to strong winds such as typhoons. In addition, transmission and distribution lines may undergo changes in tension as they expand (in the longitudinal direction = left-right direction) due to the influence of temperature, but more importantly, vibrations may occur in the forward and backward directions due to strong winds such as typhoons. When transmission and distribution lines vibrate in the forward and backward directions, it affects the supporting capacity of the lines to the suspension insulators and the supporting capacity of the suspension insulators to the utility poles. Meanwhile, when transmission and distribution lines are composed of single conductors, a magnetic field discharge phenomenon called corona occurs around the lines due to high-voltage current, leading to leakage current and resu