Mechanical Characteristic Analysis of Interphase Spacers in Double-Circuit Lines Under Ice-Shedding Jump Conditions
Abstract
:1. Introduction
2. Mechanical Model of Double-Circuit Transmission Lines on the Same Tower
2.1. Finite Element Model of the Overall Transmission Line
2.2. Finite Element Theory of Conductor Ice-Shedding
2.3. Icing and Ice-Shedding Configurations
2.4. Mechanical Model of Interphase Spacer Rods
2.5. Analysis of Ice Shedding Suppression Effect by Interphase Spacer Rods
3. Interphase Spacer Model Development
3.1. Hanger Fittings and Bolt Model
3.2. Ball Head Hanger Model
3.3. Composite Insulator Model
3.4. Interphase Spacer Model
3.5. Constitutive Model
3.6. Connection Relationships
4. Mechanical Analysis of the Interphase Spacer
4.1. Total Deformation of the Interphase Spacer Under Ice-Shedding Jump Conditions
4.2. Stress Distribution of the Interphase Spacer Under Ice-Shedding Jump Conditions
4.3. Stress Analysis of Individual Connecting Components Under Ice-Shedding Jump Conditions
5. Conclusions
- (1)
- The interphase spacer demonstrates a significant suppression effect on conductor ice-shedding jumps, with better suppression performance observed for the middle-phase conductor compared to the lower-phase conductor. In practical applications, the deployment of interphase spacers should be optimized for different line configurations and meteorological conditions to achieve the best ice-shedding suppression effect.
- (2)
- The axial force of the interphase spacer exhibits sharp fluctuations due to the conductor jumping initially, and then gradually stabilizing over time. When the axial force approaches the specified limit, its growth stops and remains near the limit value. This principle provides important guidance for the design and maintenance of phase-to-phase spacers. To ensure the reliability of interphase spacers during long-term use, continuous monitoring of their axial forces should be conducted, and timely adjustments or replacements of the spacers should be made based on the monitoring results.
- (3)
- Ice-shedding jumps affect the stress distribution of the interphase spacer. Among the structural components of the interphase spacer, the ball head hanger exhibits a higher risk of fracture or failure under ice-shedding conditions compared to other types of fittings. Specifically, at the connection between the composite insulator rod and the ball head/socket system, the design tends to induce significant bending stress under ice-shedding conditions. This stress concentration increases the structural load at the transition area of the rod. However, the overall stress distribution remains within acceptable limits, ensuring the safe and stable operation of the transmission line. In future designs of interphase spacers, emphasis should be placed on the strength design and material selection of these critical components to enhance their resistance to ice-shedding-induced jumping.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameter | Value |
---|---|
Conductor | LGJ-400/50 |
Cross Section Area (mm2) | 451.55 |
Diameter (mm) | 27.63 |
Unit Quality (kg/km) | 1.511 |
Breaking Force (kN) | 123.40 |
Elastic Modulus (MPa) | 69,000 |
Linear Expansion Coefficient (10−6) | 19.3 |
Parts Name | Suspension Hardware | Spherical Link Hanging Rings | Composite Insulator |
---|---|---|---|
Material | Grade 35 Steel | 35CrMo | Glass Fiber |
Elastic Modulus(N·mm−2) | 2.12 × 105 | 2.13 × 105 | 8.5 × 104 |
Poisson’s Ratio | 0.291 | 0.286 | 0.22 |
Density(kg·m−3) | 7.87 × 103 | 7.87 × 103 | 2.4 × 105 |
Yield Strength(N·mm−2) | 3.15 × 102 | 8.35 × 102 | 1.5 × 103 |
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Wang, F.; Ye, J.; Zhang, T.; Liu, Z. Mechanical Characteristic Analysis of Interphase Spacers in Double-Circuit Lines Under Ice-Shedding Jump Conditions. Processes 2025, 13, 591. https://doi.org/10.3390/pr13020591
Wang F, Ye J, Zhang T, Liu Z. Mechanical Characteristic Analysis of Interphase Spacers in Double-Circuit Lines Under Ice-Shedding Jump Conditions. Processes. 2025; 13(2):591. https://doi.org/10.3390/pr13020591
Chicago/Turabian StyleWang, Feng, Jiaxuan Ye, Tong Zhang, and Zhangjun Liu. 2025. "Mechanical Characteristic Analysis of Interphase Spacers in Double-Circuit Lines Under Ice-Shedding Jump Conditions" Processes 13, no. 2: 591. https://doi.org/10.3390/pr13020591
APA StyleWang, F., Ye, J., Zhang, T., & Liu, Z. (2025). Mechanical Characteristic Analysis of Interphase Spacers in Double-Circuit Lines Under Ice-Shedding Jump Conditions. Processes, 13(2), 591. https://doi.org/10.3390/pr13020591