Jan 2023 · Academic project
132 kV Double-Circuit Transmission Line
~200 km · Conductor Selection · Sag-Tension · Insulation Coordination
Design of a 132 kV double-circuit overhead transmission line spanning approximately 200 km, covering conductor selection, sag-tension, insulation coordination and tower planning with technical and cost analysis.
- 1Conductor selection
- 2Sag-tension
- 3Insulation coordination
- 4Tower planning
Illustrative diagram — not a client or employer drawing.
01Project overview
This project designed a 132 kV double-circuit overhead transmission line spanning approximately 200 km.
The scope included conductor selection, sag-tension calculations, insulation coordination and tower planning, together with technical and cost analysis.
02Engineering problem
A long overhead line has to carry power reliably across ~200 km while staying mechanically sound and electrically safe under varying loading and weather.
That means choosing conductors, spans, clearances and towers that balance performance, safety and capital cost.
03Responsibilities
- Designed a 132 kV double-circuit line spanning approximately 200 km.
- Performed conductor selection and sag-tension calculations.
- Addressed insulation coordination and tower planning.
- Prepared technical and cost analyses balancing structural safety, electrical performance and capital cost.
04System architecture
- A double-circuit tower carries two three-phase circuits, doubling capacity on a shared corridor.
- Conductors are strung between towers with spans and sags set by sag-tension analysis.
- Insulation and clearances are coordinated to withstand the line's operating and transient voltages.
05Engineering methodology
- Conductors were selected for the required capacity and mechanical loading.
- Sag-tension calculations set span geometry and ground clearance across conditions.
- Insulation coordination and tower planning addressed electrical withstand and structural support.
06Tools & platforms
- AutoCAD
- MATLAB
- Transmission-line design methods
07Validation approach
- The design was supported by technical analysis of structural safety and electrical performance.
- A cost analysis was prepared alongside the technical work to weigh capital cost against performance.
08Engineering considerations
- The work balanced structural safety, electrical performance and capital cost.
- Double-circuit construction increases corridor capacity for a given right-of-way.
09Outcomes
- A 132 kV double-circuit line design over approximately 200 km with conductor, sag-tension, insulation and tower decisions.
- Technical and cost analyses documenting the engineering trade-offs.
10Skills demonstrated
- Transmission-line design
- Conductor selection
- Sag-tension analysis
- Insulation coordination
- Tower planning
- Technical & cost analysis
Confidentiality note
The illustration below is a schematic portfolio representation of a double-circuit line and its key design decisions, not a construction drawing.