Overhead power lines planning design construction pdf

It is the culmination of decades of thought, study, research and the practical experience of many overhead power line engineers and researchers. The book covers the main aspects of overhead power line design and construction from electrical first principals, system planning, insulation co-ordination including live-line working and mechanical design through to environmental impact management and power line communications.

The content emphasises the need for close interaction between all technical disciplines involved and the importance of optimising designs for economy and performance. Additional challenges in South Africa are the relatively high altitude of the interior plateau, severe lightning in some areas and long transmission distances.

This volume explains how these factors are accommodated in modern designs. Other work covered includes the use and understanding of polymeric insulators, the judicious reduction of phase-to-phase spacings and the extensive adoption of guyed structures. Global Landscape of Renewable Energy Finance Uganda tops African countries with well-developed electricity regulatory frameworks - ERI report.

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Under Construction. Table 1 - List of Developers in Africa. Need help to find something? East Africa. North Africa. Southern Africa. West Africa. Burkina Faso. Cape Verde. Central African Republic. Congo Democratic Republic. Bestsellers Editors' Picks All Ebooks. Explore Audiobooks. Bestsellers Editors' Picks All audiobooks. Explore Magazines.

Editors' Picks All magazines. Explore Podcasts All podcasts. Difficulty Beginner Intermediate Advanced. Explore Documents. Uploaded by Sead Saric. Overall planning, electric requirements and design, conductor selection, earth wire selection, insulators and fittings, conductor vibrations, supports, foundations for supports, sag and tension calculations, construction etc. Very good tool for an overhead line engineers and designers. Did you find this document useful? Is this content inappropriate?

Report this Document. Flag for inappropriate content. Download now. For Later. Related titles. Carousel Previous Carousel Next. OHL Manual Vol. Jump to Page. Search inside document. Kiessling « P. Kiessling - P. Nefzger - J. Nolasco - U. Friedrich Kiess Dipl. Ulf Kaintzyk E-mail: ulf. Electricity has been used as a major energy source since the late 19 century. Since electric energy cannot be stored, generation in power plants and consumption need to be permanently balanced requiring powerful transmission systems.

Such systems were installed in many parts of the world in the 20" century utilising step by step rising voltages. The kV voltage was used in Germany in ; lines adopting kV were opened there in ; in , kV transmission started in Sweden; the first KV line was installed in Canada in and a KV line in the former Soviet Union in Even in developing countries such as South Africa, electric streetlights were used in Kimberly alzeady in , a time when London still relied on gas.

As in other parts of the world, industrial development such as mining activities, resulted in many independent power producers being formed to supply small networks in South Africa. Transmission voltages of up to 44 kV were used in the 's. As development grew, it became apparent that it was more cost effective to transmit energy over long distances in the form of electricity than to transport coal or gas and generate at the load. This led to developments of higher and higher voltages generally kV in the s, eV in the 's and kV in the "s.

Transmission lines form the backbones in power networks, being the installations which transmit power over long distances. They are the most valuable constituents of the net work often costing as much as or more than an entire substation. In addition, lines are uniquely designed for every application. Other devices such as breakers and transform- ers can be standardized to a large extent. Bach line has a different number of towers, foundation types and unique problems that need to be solved.

Lines are installations that can be tailor made to the requirements on the individual network. Thus, specific conductor, tower and foundation combinations can be used to provide for the optimum impedance and power transfer characteristics of the line.

The lines determine the power flow and influence the ability to control the network under normal and emergency con- ditions. Thus, designing and installing incorrect lines can have serious impacts on the viability of the network.

In the deregulated environment, this is even more important and inappropriate designs can affect trading ability as well as economic profitability of asset owners and traders. It could be argued that overhead transmission lines are but one solution to transmit power over long distances, the other being underground cables.

However, overhead lines have distinct advantages over cables. The costs of cables vary between three and ten times the costs of overhead lines, the higher ratios being found at higher voltages Overhead lines are a lot more forgiving when it comes to overloading than eables.

Line damage can be more easily discovered and repaired rapidly, e. Transmission lines can be altered in situ to accommodate the change in requirements of the network being especially important in the light of the deregulation of the industry and power trading. Foreword where one failed joint or such a component would render ineffective the entire line, stretching over many kilometres. AA line is thus the result of solving a complex combination of mechanical, electrical and civil design, construction, operation and maintenance issues.

As such, there are very few persons who are knowledgeable in the entire ambit of line design and implementation, "This new book covers all aspects of overhead line planning, design, construction, oper- ation and maintenance and allows engineers to understand the complexity as well as the interdependence between its components.

The book has been written pursuing a three step procedure, with the theory been dealt with initially and followed then by the main com- ponents. The third area covers the planning, construction, operation and maintenance of specific lines. In the 's, the Study Committee SC22 was formed devoted entirely to the study of all aspects of transmis.