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.
- Problem
- Carrying power ~200 km on a double-circuit 132 kV line means trading conductor cost against losses, ground clearance and tower loading.
- Role
- Academic project: conductor selection, sag-tension calculations, insulation coordination and tower planning, plus the cost analysis.
- Tools
- AutoCAD · MATLAB · Transmission-line design methods
- Outcome
- A complete route design with span geometry and clearances set by sag-tension analysis, documented against structural, electrical and capital-cost criteria.
- 1Conductor selection
- 2Sag-tension
- 3Insulation coordination
- 4Tower planning
Text description of this diagram
Schematic of a 132 kV double-circuit overhead transmission line spanning approximately 200 kilometers. Three lattice towers each carry six conductors (three per side) strung in sagging catenary spans with insulator strings. Numbered markers highlight the key design decisions: conductor selection, sag-tension calculations, insulation coordination and tower planning.
Schematic portfolio representation of a double-circuit line and its key design decisions, drawn for this page. It is not a construction drawing.
01Context & engineering problem
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.
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.
02My role
- 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.
03System 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.
04Methodology & validation
- 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.
- 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.
05Engineering considerations
- The work balanced structural safety, electrical performance and capital cost.
- Double-circuit construction increases corridor capacity for a given right-of-way.
06Outcomes
- 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.
07Tools & skills
Tools & platforms
- AutoCAD
- MATLAB
- Transmission-line design methods
Skills 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.