Summary
The increasing demand for electricity in Brazil has driven the expansion of power transmission lines (TL). The National Interconnected System (SIN) currently includes 171,640 km of transmission lines, with an expected expansion to 200,015 km by 2028. Lattice steel towers are widely used due to their advantageous behavior. Particularly the Cross-Rope type is the primary choice for high SIL lines, due to compaction of the distance between phases and have become essential where efficiency and environmental impact are critical. This paper describes the methodology adopted to the CICA Cross-Rope tower (CICA-CR) design, which uses polymeric insulators for phases suspension. Unlike the Traditional Cross-Rope (T-CR), where guy wires and cables are at the same level, the CICA-CR tower positions the guy wires and insulated cross-rope below the internal tie cable. This paper also presents the non-linear static numerical modelling in the Tower software of a series of three Cross-Rope towers (light, medium and heavy) applied at four 500 kV TL, totalizing 1,122 km, aiming at comparing traditional and
Read more Read lessCICA Cross-Rope solution. This study reveals substantial differences between towers from structural response, weight and foundation loads, underscoring the potential for cost-effective and efficient TL designs. This research describes the structural modelling, calculation procedures, and detailing strategies used in the design of the CICA-CR tower. The results showed that the CICA-CR tower presents significant structural advantages, including a reduction up to 23% in mast compression forces, a decrease up to 6.5% in total structural weight and lower foundation loads, with reductions up to 8% in excavation and concrete volume and up to 9% in reinforcement requirements. Considering the large number of structures in a typical 500 kV TL, such reductions represent a significant overall gain. In conclusion, the CICA-CR tower presents alternative, achieving significant efficiency gains improving mechanical safety and electrical performance as well as logistic and construction efficiency.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_10871_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Brazil |
| Study committees | |
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
LOPES Rodrigo - Shemar Brazil; CAMPOS Paulo - Shemar Brazil; RECHTMAN Mariana - Shemar Brazil; WANG Xinlong - Shemar China; LIU Chao - Shemar China; HUANG Qing - Shemar China; ROSA Lucyana - Shemar Brazil; LIU Yang - Shemar China; FERNANDES Marcos - Shemar Brazil
Keywords
Composite materials; CICA Cross-Rope; Structural design; High Surge Impedance Level; Compactation
