Overview

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This course provides a focused understanding of mechanical and civil engineering principles for overhead AC transmission lines. It covers tower design, conductor behaviour, sag–tension analysis, vibration control, stringing methods, and testing in HV/EHV systems. Civil topics include soil investigation, foundation types, erection practices, safety measures, and modern analysis tools. Emphasis is on industry practices used in utility and EPC projects, supported by numerical analysis, MATLAB-based sag studies, and real-life case examples. Objectives: Learners will understand design principles of transmission towers, analyze mechanical loads, perform sag and tension calculations, assess environmental impacts, evaluate vibration and damping, and apply foundation design and safety practices in field conditions. Target Learners / Audience: Suitable for electrical and civil engineering students, graduate trainees, transmission line professionals, utility personnel, and engineers seeking practical expertise in transmission line design, construction, and maintenance.

Syllabus

Mechanical Design of Overhead AC Transmission Lines: Part-I

Let’s begin this module by understanding the fundamental principles involved in the mechanical design of overhead AC transmission lines, including tower classification, loading conditions, sag and tension analysis, and conductor clearances. The module discusses the influence of terrain, ecological, and seismic conditions on transmission line design. It also introduces sag template preparation, tower spotting concepts, and the application of MATLAB simulation techniques for analyzing sag under wind and ice loading conditions used in modern transmission line engineering projects.

Mechanical Design of Overhead AC Transmission Lines: Part-II

Let’s begin this module by understanding the mechanical performance of overhead line conductors, including different types of conductor vibrations, vibration control methods, and testing procedures used in transmission systems. The module discusses the design aspects of HV and EHV transmission towers and testing methods for towers and conductors. It also introduces transmission tower erection procedures, conductor stringing methods, safety measures, and practical case studies related to transmission tower analysis and design used in modern power transmission engineering.

Soil Work and Civil Foundation

Let’s begin this module by understanding the importance of soil investigations, soil classification, and foundation systems used in transmission line projects. The module discusses different types of soils and rocks, classification of foundations, pile foundations, and special foundation techniques such as well and raft foundations adopted for transmission towers. It also introduces tower foundation protection methods, testing and investigation procedures, safety measures during civil work and excavation activities, along with practical case studies related to landslide mitigation and foundation stability in transmission line projects.