Inter-Phase Spacer Insulator and Fixing Clamp Assembly for Offshore Power Transmission Tower Conductors

Abstract

The present invention relates to a power line insulation spacing maintenance system for a power distribution overhanging tower, and more specifically, to a system in which a suspension insulator part is connected to the overhanging tower part to provide electrical insulation between the tower and the power line, and a first power line and a second power line arranged in the left and right directions are fixed by a suspension insulator clamp part coupled to the bottom of the suspension insulator part, and the first and second clamps fastened to the outer surface of these power lines are coupled with a long-bar insulator to maintain a constant spacing between the power lines, thereby preventing contact between power lines and galloping phenomena that may occur due to strong winds and vibrations in a marine environment, improving the insulation performance of the power lines, and ensuring the stability and reliability of the tower structure to guarantee the safety of power supply.

Description

Technology Field

[0001] The present invention relates to a power line insulation spacing maintenance system for a power distribution overhanging tower, and more specifically, to a system in which a suspension insulator part is connected to the overhanging tower part to provide electrical insulation between the tower and the power line, and a first power line and a second power line arranged in the left and right directions are fixed by a suspension insulator clamp part coupled to the bottom of the suspension insulator part, and the first and second clamps fastened to the outer surface of these power lines are coupled with a long-bar insulator to maintain a constant spacing between the power lines, thereby preventing contact between power lines and galloping phenomena that may occur due to strong winds and vibrations in a marine environment, improving the insulation performance of the power lines, and ensuring the stability and reliability of the tower structure to guarantee the safety of power supply. Background Technology

[0003] Power lines installed on conventional offshore steel towers are continuously exposed to external factors such as strong winds, salt, high humidity, rain and wind, and typhoons due to the characteristics of the marine environment. These factors cause the power lines to vibrate and shake continuously, leading to problems where the separation between power lines becomes unstable. In particular, if contact occurs between adjacent power lines due to galloping or jumping phenomena during strong winds, insulation breakdown or partial discharge can be induced. This can result in risks such as damage to the power line sheath, current leakage caused by sparks, short circuits, and fires. Furthermore, these accidents caused serious problems, leading not only to simple electrical losses but also to a decline in the supply stability of the entire offshore power grid and increased maintenance costs.

[0004] Meanwhile, conventional technology has utilized structures employing simple metal spacers or insulating rods to maintain spacing between power lines. However, such simple structures are unable to adequately absorb strong vibrations and pendulum motions occurring in marine environments. Furthermore, problems have arisen where metal fatigue accumulates due to repetitive loading, leading to structural failure or wear of the wire insulation. Additionally, metal spacers pose a risk of electrical interference due to induced current, and even when using insulating rods, there are limitations as surface contamination reduces insulation resistance, increasing leakage current. In particular, marine environments are rich in salt and moisture; consequently, the deposition of salt on the surface of insulators combines with rainwater to form a conductive contamination layer, frequently accelerating partial discharge and insulation breakdown.

[0005] Furthermore, conventional power line fixing clamps merely mechanically secure the wires and fail to absorb shocks caused by vibration or galloping. Consequently, the wires often move slightly inside the clamp, leading to wear or damage to the insulation. Such insulation damage shortens the lifespan of the wires in the long term and degrades insulation performance, increasing the risk of safety accidents. In addition, the connection structure between the clamp and the insulator is not rigid, leading to loosening or deformation when external loads are repeatedly applied. Moreover, prolonged use shortens the maintenance cycle, resulting in reduced economic efficiency.

[0006] In particular, since offshore steel towers are more difficult to maintain and have significantly higher replacement costs compared to onshore towers, a structure that ensures durability and insulation reliability from the initial stages is essential. However, conventional technology failed to adequately consider the unique offshore environments involving salt corrosion, high humidity, ultraviolet radiation, and strong winds. Furthermore, the lack of silicone coating or UV stabilization treatments led to a problem where insulation performance deteriorated rapidly over time. Additionally, because the length and installation angle of the span spacers were not designed based on vibration analysis, there were cases where resonance occurred due to winds of specific frequencies, causing a counterproductive effect where vibrations were actually amplified.

[0007] Therefore, there is an urgent need to develop a new power line insulation spacing maintenance system that is suitable for marine environments, stably maintains power line spacing, simultaneously secures vibration absorption and insulation performance, and features a long-span spacer and fixed clamp structure with resistance to contamination, salt damage, and ultraviolet rays, thereby extending the lifespan of power lines, reducing maintenance costs, and ensuring the stability of power supply to offshore steel towers. Prior art literature

[0009] Patent Document (001) Republic of Korea Registered Patent No. 10-1234259 (Registered on Feb. 12, 2013) The problem to be solved

[0010] The technical problem that the present invention aims to solve is to provide a power line insulation spacing maintenance system for power distribution transmission towers that prevents galloping and jumping phenomena between power lines caused by strong winds and vibrations in a marine environment, thereby preventing insulation breakdown and current leakage caused by contact between wires.

[0011] Another objective of the present invention is to provide a power line insulation spacing maintenance system for power distribution transmission towers that ensures mechanical stability of power lines by maintaining a constant spacing between power lines and improves structural safety by evenly distributing the load of the transmission tower structure.

[0012] Another objective of the present invention is to provide a power line insulation spacing maintenance system for power distribution towers that effectively absorbs vibration and shock loads by interposing elastic buffers in the first and second clamps, and prevents fatigue accumulation and damage to the wire sheath.

[0013] Another objective of the present invention is to provide a power line insulation spacing maintenance system for power distribution transmission towers that reduces friction, prevents current leakage, and improves insulation reliability by forming a silicone rubber or synthetic resin coated contact pad on the inner surface of a clamp that contacts the power line.

[0014] Another objective of the present invention is to provide a power line insulation spacing maintenance system for power distribution transmission towers that prevents insulation degradation caused by the deposition of salt, moisture, dust, etc., and maintains long-term insulation performance by forming a hydrophilic silicone coating layer and a heat-resistant insulation layer on the outer surface of a long-bar insulator.

[0015] Another objective of the present invention is to provide a power line insulation spacing maintenance system for power distribution transmission towers that designs the outer surface of a long-rod insulator with a curved curvature structure to secure a self-cleaning function that naturally removes contaminants during rainwater flow and suppresses partial discharge.

[0016] Another objective of the present invention is to provide a power line insulation spacing maintenance system for a power distribution transmission tower that corrects tension imbalance between power lines and ensures structural balance by providing a length adjustment means capable of finely adjusting the length between the first and second clamps.

[0017] Another objective of the present invention is to provide a power line insulation spacing maintenance system for power distribution transmission towers, which is equipped with a sensor unit for detecting vibration, temperature, and current in the span spacer unit to detect abnormal vibration or insulation failure in real time and provide a notification to a monitoring system.

[0018] Another objective of the present invention is to provide a power line insulation spacing maintenance system for a distribution seawall tower that ensures the overall structure has corrosion resistance and durability suitable for a marine environment, thereby extending the maintenance cycle and improving the stability and reliability of the power supply to the seawall tower.

[0020] Meanwhile, the technical problems to be solved by the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem

[0022] A power line insulation spacing maintenance system for a power distribution tower according to an example of the present invention for realizing the above-described task may first include a tower section (100).

[0023] Additionally, it may include a suspension insulator (200) connected to the above-mentioned steel tower section (100) to provide electrical insulation between the steel tower and the power line.

[0024] Additionally, it may include a suspension insulator clamp part (300) coupled to the lower end of the suspension insulator (200) and configured to fix the first power line (L1) and the second power line (L2) in the left and right directions, respectively.

[0025] And, a long-distance spacer part (400) may be provided such that the first clamp (410) which wraps around the outer surface of the first power line (L1) and is coupled to the first power line (L1), and the second clamp (420) which wraps around the outer surface of the second power line (L2) and is coupled to the second power line (L2) are combined by a long-distance insulator (430) so that the spacing between the first and second power lines (L1, L2) is maintained at a predetermined level.

[0026] Here, the first and second clamps (410, 420) may be characterized by including a pair of U-bolts (411, 421) that wrap around the first and second power lines (L1, L2) and a clamp body (412, 422) to which the U-bolts (411, 421) are fastened, and an elastic cushion (413, 423) may be provided between the U-bolts (411, 421) and the clamp body (412, 422) to absorb vibration or galloping shock of the wires to prevent fatigue and breakage of the wires.

[0027] At this time, a silicone rubber or synthetic resin-coated contact pad (414, 424) is formed on the surface in contact with the sheath of the first and second power lines (L1, L2) to have a low friction coefficient and prevent current leakage, thereby preventing damage to the sheath of the wire and maintaining electrical insulation; a coupling eyelet (415, 425) is provided at the bottom of the main body (412, 422) to be directly connected to the long-rod insulator (430) so as to distribute the vibration load of the wire evenly; additionally, the wire seating groove (416, 426) on which the first and second power lines (L1, L2) are seated is formed with a curved structure that matches the curvature of the wire to prevent damage to the sheath of the wire and a friction structure (416a, 426a) in the form of an uneven surface or groove is formed to suppress slippage of the wire, and the installation spacing of the first and second clamps (410, 420) and The angle may be characterized by being configured to minimize galloping and jumping of the wires based on vibration analysis.

[0028] Meanwhile, the above-mentioned long-rod insulator (430) may be characterized by having a hydrophilic silicone coating layer (432) formed on its outer surface to suppress leakage current caused by the deposition of rainwater, dust, and salt, and having a heat-resistant insulating layer, an epoxy resin layer (432a), laminated inside the hydrophilic silicone coating layer (432) to form a double coating structure, and the surface shape of the outer surface is formed as a curved curvature structure (432b) to have a self-cleaning function so that contaminants are removed when rainwater flows, and the curvature of the curved curvature structure (432b) on the outer surface is provided to prevent electric field concentration and suppress partial discharge, and the silicone coating layer (432) may be provided with a UV stabilizing additive to prevent performance degradation due to ultraviolet degradation so as to be maintained even in external environments such as high temperature, high humidity, coastal salt damage, and strong winds.

[0029] Here, the above-mentioned long-length insulator (430) may be characterized by being provided with a length adjustment means (433) for finely adjusting the length between the first clamp (410) and the second clamp (420), and by being provided to adjust the length using the length adjustment means (433) when the tension between the first and second power lines (L1, L2) is unbalanced.

[0030] Additionally, the above-mentioned long-distance spacer (400) may further include a sensor unit (440) for detecting vibration, temperature, or current status of the first and second power lines (L1, L2), and the sensor unit (440) may be characterized by being configured to provide an alarm to a monitoring system when abnormal vibration or insulation failure occurs by transmitting sensor information collected by a collected communication module (441) via wireless communication. Effects of the invention

[0032] If a power line insulation spacing maintenance system for a power distribution steel tower according to one embodiment of the present invention is used,

[0033] First, the spacing between power lines is maintained at a constant level, which prevents contact between wires caused by galloping or jumping phenomena and has the effect of preventing insulation breakdown and short-circuit accidents.

[0034] Second, power lines are stably supported even by strong winds and vibrations in the marine environment, which reduces swaying and vibration and improves structural stability.

[0035] Third, the elastic cushioning material interposed in the first and second clamps absorbs vibration and shock, preventing fatigue accumulation and damage to the wire insulation and extending the lifespan of the wire.

[0036] Fourth, silicone rubber or synthetic resin coated contact pads reduce friction with the wire sheath, thereby preventing current leakage and increasing insulation reliability.

[0037] Fifth, the hydrophilic silicone coating layer formed on the outer surface of the long-rod insulator suppresses surface contamination caused by rainwater and salt, thereby maintaining insulation performance for a long period.

[0038] Sixth, the outer surface having a curved curvature structure naturally removes contaminants along the flow of rainwater, thereby exhibiting a self-cleaning function and having the effect of suppressing partial discharge.

[0039] Seventh, the distance between the first and second clamps can be adjusted through the length adjustment means, which has the effect of relieving tension imbalance between power lines and maintaining a balanced structure.

[0040] Eighth, the sensor unit installed in the long-distance spacer detects the vibration, temperature, and current status of the power line in real time, enabling a rapid response in the event of an abnormality.

[0041] Ninth, the entire system ensures corrosion resistance and durability suitable for the marine environment, extending the maintenance cycle and improving the stability and reliability of power supply to the Haewol steel tower.

[0043] Meanwhile, the effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present invention belongs from the description below. Brief explanation of the drawing

[0045] The following drawings attached to this specification illustrate a preferred embodiment of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIGS. 1 and 2 are drawings showing the overall configuration of a power line insulation spacing maintenance system for a power distribution tower according to a preferred embodiment of the present invention. FIGS. 3 to 8 are drawings showing a first clamp of a power line insulation spacing maintenance system for a power distribution steel tower according to a preferred embodiment of the present invention. FIGS. 9 and 10 are drawings showing a second clamp of a power line insulation spacing maintenance system for a power distribution steel tower according to a preferred embodiment of the present invention. FIGS. 11 and 13 are drawings showing a long-bar insulator of a power line insulation spacing maintenance system for a power distribution steel tower according to a preferred embodiment of the present invention. FIG. 14 is a drawing showing a sensor part of a power line insulation spacing maintenance system for a power distribution steel tower according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0046] Specific structural or functional descriptions of embodiments according to the concept of the present invention disclosed herein are provided merely for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and are not limited to the embodiments described herein.

[0047] Embodiments according to the concept of the present invention may be subject to various modifications and may take various forms; therefore, embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents, or substitutions that fall within the spirit and scope of the present invention.

[0048] FIGS. 1 and 2 are drawings showing the overall configuration of a power line insulation spacing maintenance system for a power distribution tower according to a preferred embodiment of the present invention; FIGS. 3 to 8 are drawings showing a first clamp of a power line insulation spacing maintenance system for a power distribution tower according to a preferred embodiment of the present invention; FIGS. 9 and 10 are drawings showing a second clamp of a power line insulation spacing maintenance system for a power distribution tower according to a preferred embodiment of the present invention; FIGS. 11 and 13 are drawings showing a long-bar insulator of a power line insulation spacing maintenance system for a power distribution tower according to a preferred embodiment of the present invention; and FIGS. 14 is a drawing showing a sensor part of a power line insulation spacing maintenance system for a power distribution tower according to a preferred embodiment of the present invention.

[0050] A power line insulation spacing maintenance system for a power distribution transmission tower in one embodiment of the present invention has a configuration in which a transmission tower section (100), a suspension insulator section (200), a suspension insulator clamp section (300), and a long-distance spacer section (400) are organically combined to simultaneously solve the risk of contact between power lines and the degradation of insulation reliability in a marine environment.

[0051] The sea-mounted steel tower section (100) is a mechanical frame that supports power lines in a high-salinity marine and coastal environment. A suspension insulator clamp section (300) is coupled to the lower end of the suspension insulator section (200) to provide electrical insulation between the tower and the power lines through the upper suspension insulator section (200), thereby supporting the first power line (L1) and the second power line (L2) in the left and right directions. The long-length spacer section (400) maintains the distance between the two power lines at a predetermined value by coupling the long-length insulator (430) between the first clamp (410) and the second clamp (420). This hierarchical structure is intended to suppress power line shaking caused by strong winds and vibrations, and to prevent arcs and partial discharges caused by direct contact between power lines, thereby increasing the reliability of power transmission and distribution in the marine section. The spacing between wires varies depending on the voltage rating and site specifications. For example, a range of about 0.5 m to 1.2 m is preferred for the 22.9 kV class, about 1.0 m to 1.8 m for the 66 kV class, and about 2.0 m to 5.0 m for the 154 kV class or higher. This range is configured to reduce the probability of contact and secure corona and insulation margins in dynamic analysis considering wind load and galloping mode frequency. At this time, the seawall steel tower section (100) is advantageous for long-term durability in flame-resistant and wind-resistant environments by adopting hot-dip galvanized steel or corrosion-resistant alloy steel, and the suspension insulator section (200) is configured to enable contamination performance and secure creep distance through a composite polymer composition of an FRP core and a silicon shed.

[0052] Here, the first and second clamps (410, 420) include a pair of U-bolts (411, 421) and a clamp body (412, 422), and an elastic cushion (413, 423) is interposed between the U-bolt and the body. This configuration is designed to mitigate both low-frequency large-amplitude vibrations caused by wind and ice / snow detachment, and high-frequency small-amplitude vibrations caused by normal vibration, thereby reducing the risk of wire fatigue accumulation and breakage. At this time, the effective spring constant of the cushion is, for example, in the range of 5 kN / m to 50 kN / m, and the loss factor is configured in the range of 0.05 to 0.30. This range is configured to simultaneously avoid increased sagging due to excessive ductility and shock transmission due to excessive rigidity. A silicone rubber or synthetic resin coated contact pad (414, 424) is provided on the surface in contact with the wire sheath, and the pad thickness is, for example, 2 mm to 5 mm. This is advantageous for preventing slippage while suppressing damage to the coating by controlling the contact pressure to a level of 1 MPa to 4 MPa. The connecting eyelets (415, 425) at the bottom of the main body are directly connected to the long-rod insulator (430) to reduce the number of parts and simplify the load path, and the wire seating grooves (416, 426) are designed with a curved surface that matches the outer diameter curvature of the wire to reduce stress concentration. The friction structure (416a, 426a) of the grooves preferably has irregularities with a pitch of 1 mm to 3 mm and a depth of 0.3 mm to 1.0 mm, which evenly distributes the shear force across the entire contact surface to suppress slippage. The effective diameter of the U-bolt is preferably 10 mm to 20 mm, and the tightening torque is preferably 40 N·m to 120 N·m, which is configured to provide a balance point between pad crushing and loosening. The U-bolt can be selected from galvanized high-strength steel grade 8.8 or stainless steel 304 / 316, and the body is constructed by applying hot-dip galvanizing to cast aluminum alloy A356-T6 or ductile cast iron FCD.

[0053] Meanwhile, a hydrophilic silicone coating layer (432) is formed on the outer surface of the long-rod insulator (430), and an epoxy resin layer (432a), which is a heat-resistant insulating layer, is laminated inside to form a double coating structure. The outer surface is designed with a curved curvature structure (432b) to provide a self-cleaning effect in which contaminants are removed by the flow of rainwater, and the curvature design reduces electric field concentration to suppress partial discharge. The thickness of the silicone coating layer is preferably 0.3 mm to 1.5 mm, and the thickness of the epoxy resin layer is 0.5 mm to 3.0 mm, which provides a balance between surface weather resistance, crack resistance, and adhesion. It is preferable for the coating layer to contain 0.5 weight percent to 2.0 weight percent of a UV stabilizing additive, which delays deterioration under strong ultraviolet rays at sea. These numerical ranges reflect a compromise between the goal of suppressing surface leakage current and the processability of the seal coating, taking into account contamination intensity, sea fog exposure time, and average wind speed. It is generally advantageous to adopt a glass fiber reinforced plastic core and a high-electricity, low-loss silicon shed as the basic insulator of the long-rod insulator, and the metal end caps are configured to be made of aluminum alloy or stainless steel to inhibit galvanic corrosion.

[0054] Additionally, the long-bar insulator (430) comprises a length adjustment means (433) for finely adjusting the length between the first clamp (410) and the second clamp (420). For example, a screw-type turnbuckle structure or a fine-pitch screw jack structure may be applied, and the adjustment stroke is configured to be in the range of 50 mm to 300 mm. This configuration covers changes in line sagging due to installation deviation and temperature, and correction of tension imbalance, while not causing structural buckling or changes in vibration modes. The screw thread shape is preferably a trapezoidal or square screw shape, and a molybdenum-based lubricant is applied to the surface to prevent seizing in a marine environment. The main components are composed of 316 stainless steel or an equivalent corrosion-resistant alloy steel.

[0055] Additionally, the long-distance spacer (400) may include a sensor unit (440) and a communication module (441). Examples of the sensor unit include a vibration sensor based on a 3-axis accelerometer, a temperature sensor based on a thermistor or RTD, and a current sensor based on the Hall effect or Rogowski coil. A sampling period of 1 Hz to 10 Hz is advantageous for balancing maintenance efficiency and power consumption. The communication module may selectively employ low-power long-distance communication or short-distance wireless communication. A LoRa series or cellular IoT series is selected considering the configuration of the repeater in the maritime section. The power source is configured to combine a small solar panel and a supercapacitor or apply electromagnetic induction energy harvesting to detect abnormal vibrations and signs of insulation failure early and to optimize maintenance resources.

[0056] Here, since the ocean environment involves a combination of salt, humidity, strong winds, and ultraviolet rays, hot-dip galvanized steel or stainless steel grade 304 / 316 is suitable for metal parts, and cast aluminum alloy A356-T6 is preferred for parts requiring lightweighting. For the insulator, FRP cores and silicone sheds are excellent in terms of contamination performance and environmental resistance, and for the coating system, a combination of silicone topcoat and epoxy intermediate coat is advantageous in terms of adhesion and weather resistance. For the elastomer, silicone rubber with a hardness of 60 to 75 Shore A or weather-resistant EPDM is selected as a material suitable for vibration damping and heat and weather resistance.

[0057] Each of the aforementioned numerical ranges is presented as an example rather than a design limitation, and engineering optimization can be performed based on the offshore wind speed distribution, span length, vessel type and voltage rating, and environmental pollution level. It should be understood that the presented ranges are designed to suppress the probability of contact within an engineering safety factor, ensure the fatigue life of components exceeds the target life, and do not impede on-site construction and maintainability.

[0058] Meanwhile, the elastic damping body can be implemented as a composite damping structure in which a metal rubber insert and a silicone rubber pad are laminated to enhance damping performance in high-frequency small-amplitude vibrations. The surface coating of the long-bar insulator is configured to improve interfacial adhesion by sequentially applying an outer layer hydrophilic silicone coating layer (432) and an inner layer epoxy resin layer (432a) after plasma pretreatment, and the curved curvature structure (432b) is configured to simultaneously achieve self-cleaning performance and electric field mitigation by applying a fine lip shape with an asymmetric pitch in the circumferential direction to form a rainwater-induced flow. The length adjustment means (433) suppresses vibration loosening by using a locking nut and a spring washer in combination with a turnbuckle having left and right opposite screw threads of fine pitch, and a display unit is additionally configured so that the position after adjustment can be recorded on a scale, and the sensor unit (440) calculates the reference band RMS, peak factor, and crest factor to enable simple analysis of the abnormal vibration spectrum on-site and transmits them to the communication module (441), and the back end performs abnormal pattern determination using seasonal wind rose and span response models, and the power supply is configured to use a small solar cell and a supercapacitor in combination, and at night, electromagnetic induction type harvesting is used as an auxiliary power source to extend the battery replacement cycle.

[0060] The present invention has been described above through a preferred embodiment. However, the above-described embodiment is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art will understand that various changes are possible within the scope of the technical concept of the present invention. Accordingly, the scope of protection of the present invention should be interpreted by the matters described in the patent claims rather than by specific embodiments, and all technical concepts within the corresponding scope should also be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0062] 100 … Haewol Iron Tower Section 200 … Suspension Insulator Department 300 … Suspension insulator clamp section L1 … 1st power line L2 … 2nd power line 400 … Western Janganspe 410 … 1st clamp 411 … 1st U-bolt 412 … 1st clamp body 413 … 1st elastic buffer 414 … 1st silicone rubber-coated contact pad 415 … 1st connecting eyelet 416 … 1st wire mounting groove 416a … 1st friction structure 420 … 2nd clamp 421 … 2nd U-bolt 422 … 2nd clamp body 423 … 2nd elastic buffer 424 … 2nd silicone rubber-coated contact pad 425 … 2nd connecting eyelet 426 … 2nd wire mounting groove 426a … 2nd friction structure 430 … long-bar insulator 432 … hydrophilic silicone coating layer 432a … epoxy resin layer 432b … curved surface curvature structure 433 … length adjustment means 440 … Sensor section 441 … communication module

Claims

Claim 1 A seawall steel tower section (100); a suspension insulator section (200) connected to the seawall steel tower section (100) and configured to provide electrical insulation between the steel tower and the power line; a suspension insulator clamp section (300) coupled to the lower end of the suspension insulator (200) and configured to fix the first power line (L1) and the second power line (L2) in the left and right directions, respectively; and a long-span spacer section (400) configured such that the first clamp (410) which surrounds the outer surface of the first power line (L1) and is coupled to the first power line (L1), and the second clamp (420) which surrounds the outer surface of the second power line (L2) and is coupled to the second power line (L2) are coupled to the long-span insulator (430) to maintain the spacing between the first and second power lines (L1, L2) at a predetermined level.The first and second clamps (410, 420) include a pair of U-bolts (411, 421) that wrap around the first and second power lines (L1, L2) and a clamp body (412, 422) to which the U-bolts (411, 421) are fastened; an elastic cushion (413, 423) is provided to intervene between the U-bolts (411, 421) and the clamp body (412, 422) to absorb vibration or galloping shock of the wires to prevent fatigue and breakage of the wires; a silicone rubber or synthetic resin coated contact pad (414, 424) is formed on the surface in contact with the sheath of the first and second power lines (L1, L2) to have a low coefficient of friction and prevent current leakage, thereby preventing damage to the sheath of the wires and maintaining electrical insulation; and the main body (412, A power line insulation spacing maintenance system for a steel tower, characterized in that the lower end of the (422) is provided with a connecting eyelet (415, 425) integrally formed to be directly connected to the above-mentioned long-rod insulator (430) so as to be configured to evenly distribute the vibration load of the wire, and the wire seating groove (416, 426) on which the first and second power lines (L1, L2) are seated is formed with a curved surface structure that matches the curvature of the wire to prevent damage to the wire sheath and to suppress slippage of the wire by forming a friction structure (416a, 426a) in the form of an uneven surface or groove, and the installation spacing and angle of the first and second clamps (410, 420) are selected based on vibration analysis to minimize galloping and jumping of the wire. Claim 2 delete Claim 3 In claim 1, the above-described long-rod insulator (430) is formed with a hydrophilic silicone coating layer (432) to suppress the generation of leakage current due to the deposition of rainwater, dust, and salt on the outer surface, and an epoxy resin layer (432a), which is a heat-resistant insulating layer, is laminated inside the hydrophilic silicone coating layer (432) to form a double coating structure, the surface shape of the outer surface is formed with a curved curvature structure (432b) to have a self-cleaning function so that contaminants are removed when rainwater flows, and the curvature of the curved curvature structure (432b) on the outer surface is provided to prevent electric field concentration and suppress partial discharge, and the silicone coating layer (432) is provided with a UV stabilizing additive to prevent performance degradation due to ultraviolet degradation so as to be maintained even in external environments of high temperature, high humidity, coastal salt damage, and strong winds, characterized in that it is a power line insulation spacing maintenance system for a power distribution steel tower. Claim 4 In claim 3, the power line insulation spacing maintenance system for a power distribution tower is characterized in that the long insulator (430) is provided with a length adjustment means (433) for finely adjusting the length between the first clamp (410) and the second clamp (420), and is configured to adjust the length using the length adjustment means (433) when the tension between the first and second power lines (L1, L2) is unbalanced. Claim 5 In claim 4, the above-mentioned span spacer (400) includes a sensor unit (440) that detects vibration, temperature, or current conditions of the first and second power lines (L1, L2) and generates sensor data, and a communication module (441) that is electrically connected to the sensor unit (440) and receives sensor data transmitted from the sensor unit (440) and transmits it to an external monitoring system via wireless communication, wherein the communication module (441) is configured to output an alarm signal by determining an abnormal vibration or insulation failure condition when the sensor data exceeds a preset threshold.

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