Double-Circuit Towers vs. Single-Circuit Towers: Skills for Balancing Transmission Line Capacity Planning and Cost Control

The selection between double-circuit towers and single-circuit towers requires comprehensive decision-making based on transmission capacity, cost budgets, and engineering scenarios, with the core lying in finding a balance between performance and cost. Drawing on the design specifications of the power tower industry and the project experience of Hengshui Defang Tower Industry Co., Ltd., this article shares practical selection skills.

Double-circuit towers can accommodate two transmission lines on the same tower body, doubling the capacity compared to single-circuit towers. They are suitable for load-intensive urban power grids or long-distance transmission projects. Adopting a spatial truss structure, the rods are mainly made of Q345 low-alloy high-strength steel, precisely processed by CNC hydraulic punching machines to ensure structural stability. Although the initial construction cost is 30%-40% higher, the long-term operation and maintenance costs are lower, and the land occupation is more economical.

Single-circuit towers feature a simple structure, short construction cycle, and obvious cost advantages, making them suitable for low-load areas such as rural and suburban regions. Their rods are mostly composed of single equal-angle steels connected by bolts, enabling convenient installation and quick response to short-term transmission needs.