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This Book is a product of the Municipal services Project, a multi-partner research,policy and educational initiative examining the restructuring of municipal services of decentralisation,privatisation,cost recovery and community participation on the delivery of basic services to the rural and urban poor, and how these reforms impact on public,industrial and mental heath.  

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This book covers the major topics likely to be encountered by the transmission and distribution power systems engineer engaged upon international project works. Each chapter is self-contained and gives a useful practical introduction to each topic covered. The book is intended for graduate or technician level engineers and bridges the gap between learned university theoretical textbooks and detailed single topic references. It therefore provides a practical grounding in a wide range of transmission and distribution subjects. The aim of the book is to assist the project engineer in correctly specifying equipment and systems for his particular application. In this way manufacturers and contractors should receive clear and unambiguous transmission and distribution equipment or project enquiries for work and enable competitive and comparative tenders to be received. Of particular interest are the chapters on project, system and software management since these subjects are of increasing importance to power systems engineers. In particular the book should help the reader to understand the reasoning behind the different specifications and methods used by different electrical supply utilities and organizations throughout the world to achieve their specific transmission and distribution power system requirements. The second edition includes updates and corrections, together with the addition of two extra major chapters covering distribution planning and power system harmonics.

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This book presents new and important research on electric power and its generation, transmission and efficiency. The world is becoming increasingly electrified. For the foreseeable future, coal will continue to be the dominant fuel used for electric power production. The low cost and abundance of coal is one of the primary reasons for this. Electric power transmission, a process in the delivery of electricity to consumers, is the bulk transfer of electrical power. Typically, power transmission is between the power plant and a substation near a populated area. Electricity distribution is the delivery from the substation to the consumers. Due to the large amount of power involved, transmission normally takes place at high voltage (110 kV or above). Electricity is usually transmitted over long distance through overhead power transmission lines. Underground power transmission is used only in densely populated areas due to its high cost of installation and maintenance, and because the high reactive power gain produces large charging currents and difficulties in voltage management. 

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The material that follows consists of lectures on the topic of transient signals on transmission lines. Emphasis has been placed on aspects of the subject that have application to signal integrity and high-speed digital circuit design issues, including proper termination schemes to avoid impedance discontinuities, reactive and nonlinear loads, and an introduction to crosstalk. This material has formed the first part of the core undergraduate electromagnetic fields course at the Georgia Institute of Technology since 1999. Since transmission line transients have been de-emphasized in most current textbooks, including those that have been used at Georgia Tech during this time, this material was prepared to supplement traditional texts. With the exception of the material on crosstalk, the authors typically cover each chapter that follows in one 50-minute class period.

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This manual was written to assist technicians and service personnel with the repair and maintenance procedures for Briggs & Stratton electric- and gasoline-powered outboards. It assumes that persons using this manual have been properly trained in and are familiar with the servicing procedures for these products, including the proper use of required tools and safety equipment and the application of appropriate safety practices. Persons untrained or unfamiliar with these procedures or products should not attempt to perform such work. 

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Preface 
Both authors have taught the course of “Distributed Systems” for many years in the respective schools. During the teaching, we feel strongly that “Distributed systems” have evolved from traditional “LAN” based distributed systems towards “Internet based” systems. Although there exist many excellent textbooks on this topic, because of the fast development of distributed systems and network programming/protocols, we have difficulty in finding an appropriate textbook for the course of “distributed systems” with orientation to the requirement of the undergraduate level study for today’s distributed technology. Specifically, from upto-date concepts, algorithms, and models to implementations for both distributed system designs and application programming.

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Preface 
The field of computer networking has seen a dramatic change in its nature over the last few decades. In the early 1970s, computer networks tended to be a relatively specialized field with only a few experts at select universities and within the computer industry. There were a few scattered computer networks, mainly owned by large corporations, and some experimental university networks. In the last decade of the twentieth century, computer networks have become much more ubiquitous, and the Internet has become a household word. There are many more networks today, and the older existing networks (e.g., the public Internet) are much larger and more complex. Although this increase in the size, number, and complexity of computer networks has enabled the deployment of many new applications, it has a downside as well. As networks become larger, more complex, and support more traffic, the performance of networked applications becomes more unpredictable and often unacceptable. Thus, a conscious effort needs to be made to improve the performance of networked applications, a term which can be loosely interpreted to include all applications consisting of two or more components communicating over a computer network. Thus, techniques that can improve the performance of a networked application need to be explored in more detail. This book is about such a technique: content distribution networks, also known as content delivery networks, intelligent Internet infrastructure, and enhanced surrogate services. A content distribution network employs many geographically distributed sites to improve the scalability and client response time of applications. Content distribution networks offer certain advantages over alternative approaches to managing performance of networked applications, and hold a lot of promise for improving their performance. This book explains the functioning of a content distribution network. It describes the components that make up a content distribution network, the different technologies that can be used within a content distribution network, and a description of some webbased applications that can be accelerated by using a content distribution network.

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Preface 

Ueriving entertainment and availing a variety of multimedia services via home-computers/laptops or mobile devices, have become commonplace for Internet users in this modern era. Growing high-speed networking technology coupled with the development of ultra-speed multimedia high-end machines facilitates the notion of rendering such media services at attractive costs. Network based multimedia services attempt to render best effort services at cheaper prices. For instance, a video rental store allows users to rent video cassettes, CDs/DVDs at a fixed price. In contrast, a networked multimedia service (NMS) allows a user to surf through a range of collections and obtain the desired content, without having to satisfy timing, or physical location restrictions. Furthermore, a user need not even be confined to a specific location, but could be roaming with a mobile device. Modern Video/Movie-on-Demand (V/MoD) services even allow complete interactivity by supporting functionality that includes variable-speed playback, fast-forward/backward, etc. 

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Preface In industrialized countries, distribution systems deliver electricity literally everywhere, taking power generated at many locations and delivering it to end users. Generation, transmission, and distribution — of these big three components of the electricity infrastructure, the distribution system gets the least attention. Yet, it is often the most critical component in terms of its effect on reliability and quality of service, cost of electricity, and aesthetic (mainly visual) impacts on society.
           Like much of the electric utility industry, several political, economic, and technical changes are pressuring the way distribution systems are built and operated. Deregulation has increased pressures on electric power utilities to cut costs and has focused emphasis on reliability and quality of electric service. The great fear of deregulation is that service will suffer because of cost cutting. Regulators and utility consumers are paying considerable attention to reliability and quality. Another change that is brewing is the introduction of distributed generation on the distribution system. Generators at the distribution level can cause problems (and have benefits if properly applied). Customers are pressing for lower costs, better reliability, and less visual impact from utility distribution systems.
           Deregulation and technical changes increase the need by utility engineers for better information. This book helps fill some of those needs in the area of electric distribution systems. The first few chapters of the book focus on equipment-oriented information and applications such as choosing transformer connections, sizing and placing capacitors, and setting regulators.
           The middle portion of this handbook contains many sections targeting reliability and power quality. The performance of the distribution system determines greater than 90% of the reliability of service to customers (the high-voltage transmission and generation system determines the rest). If performance is increased, it will have to be done on the distribution system.
           Near the end, we tackle lightning protection, grounding, and safety. Safety is a very important consideration in the design, operation, and maintenance of distribution facilities. The last chapter on distributed generation provides information to help utilities avoid problems caused by the introduction of distributed generation.
          I hope you find useful information in this book. If it is not in here, hopefully one of the many bibliographic references will lead you to what you are looking for. Please feel free to email me feedback on this book including errors, comments, opinions, or new sources of information. I would like to hear from you. Also, if you need my help with any interesting consulting or research opportunities, I would love to hear from you.

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Today,there are excellent textbooks dealing with topics in power systems.Some of them are considered to  be classics. However,they do not particularly address ,nor concentrate on , topics dealing with electric power distribution engineering .Presently,to the author's knowledge ,the only nook available in the electric power systems literature that is totally devoted to power distribution engineering is the one by the westinghouse electric Corporation entitled Electric Utility Engineering Reference book distribution Systems.However, as the title suggest, it is an excellent reference book but unfortunately not a textbook therefore the intention here is to fill the vacuum,at least partially,that has existed to long in power systems engineering literature.   

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Recent Events

The last few years have not favored private investors in electricity distribution companies in developing countries. In India, the AES Corporation told the Orissa state government that it wished to sell its ownership interest in a local distribution company because it saw no way to make the company a viable commercial enterprise. A few months later, BSES, a large Indian power company that had invested in three other distribution companies in Orissa, also threatened to leave. In Ecuador, the government announced that it was abandoning its plans to privatize 17 state electricity distribution companies after receiving a poll that showed that more than 71 percent of the general public was opposed to such privatizations. In Senegal, a new government terminated its agreement with Senelec, a consortium of Tractebel/Hydro Quebec, after accusing the consortium of failing to improve the frequency and duration of blackouts. In Brazil, AES experienced major financial problems for Electropaulo, its distribution company in Sao Paulo—problems caused in part by a significant drop in sales and revenues following in the wake of a governmentmandated rationing program. The company protested that the rationing program put it in the difficult position of having to tell its customers: “We are asking you not to buy the only thing that we have to sell.”.

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This handbook is published to assist the user of low-voltage switchgear,switchoards and distribution systems is the  planning of installations as well as the specification,selection ,operation and maintenance of equipment.it not only deals with the broader fundamental and theoretical principles, but also provides quick and precise answers to specializes questions in this field of electrical engineering.the particular problems related to project planning receive the same attention as those arising during construction,installing,operation and maintenance.

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