John Tarilanyo Afa (84 results)

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Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - Technical Report from the year 2011 in the subject Engineering - Power Engineering, grade: A, ( Atlantic International University ) (Niger Delta University), course: PRE 677, language: English, abstract: Rural electrification is a global challenge especially in the developing countries. The problem of rural electrification is acute in Nigeria because the country has not been able to provide adequate supply to the connected consumers. The case of Bayelsa State is peculiar because the geographical position of the state offer various problems to rural electrification. The state is bounded by rivers, estuaries, creeks and stagnant swamps that pose problems to rural electrification in terms of settlements, accessible roads, good available means of transport etc.The climatic conditions and flooding are factors militating against the rapid growth of this area. Lack of industrial customers, low load forecast and very long distances from the grid with huge cost of installation, maintenance and operations are key factors.Bayelsa State is dissected centrally by longitude 6° East and latitude 4.5° North. Bayelsa State with a population of 1,121,693 spread over a land area of 12,000 sq kilometer most of which is water or wet lands. Its definitive boarder is the 185 kilometer of coast line through which its many rivers issue into the Atlantic Ocean. There are few big cities due to the flooding and erosion and some are almost cut off from the capital due to the area of settlement.Bayelsa State is located in the heart of the Niger Delta and is one of the central areas that produce the resources (Oil and Gas) which account for about 97 percent of the National total earning (Sambo 2008). The operational base of the oil companies are not located within the source of the revenue, thereby making the place poor, rejected with no impact of such huge revenue taken out of this areas. These areas of Bayelsa State was regarded as rural areas before the creation of the state, therefore it has little or no development. The Oil Companies contributed to the level of poverty because the administrative headquarter of these companies are out of state and are far from the source of the oil deposit. The outcome of this was denial of the people from all social amenities, unemployment, rejection, poverty and devastation of the ecological sources due to spillages and gas flaring.Due to the outcry, the government is trying to put certain things in place for the development of the Niger Delta, therefore it is necessary to study the problems facing the environment so that policies, designs and construction will be based on facts concerning the development of the area.…

Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - Technical Report from the year 2011 in the subject Engineering - Power Engineering, grade: A, ( Atlantic International University ) (Niger Delta University), course: LPH 657, language: English, abstract: Lightning is a major source of danger to H.V transmission lines resulting in serious overvoltage which may cause flashover, puncture and sometimes loss of transmission line up to few hours or complete destruction of lines.The study is focused on Bayelsa State whose coastal areas occupy about eighty percent of the state. Due to its geographical location (Mangrove swamp forest) especially the coastal areas, these are areas of high thunderstorm and lightning days per year. This will pose significant influence on transmission line performance.From the present load with the proposed projects when completed may demand bulk power supply. The need of using high voltage transmission lines is there. Presently, it is expected that 132kv line may run from Yenagoa to Brass through Ogbia. It is therefore necessary to study the line performance in these areas of high Isokeraunic level. Lightning faults may be single or multi-phase and their elimination causes reclosing cycles, voltage dips and outages. Therefore the outage rate of a line and the quality of the delivered voltage depends on the lightning performance of the line. No transmission line design can be considered lightning proof, nor designers aimed at this goal. An acceptable design is to allow a certain number of outage per 100km of line or other line durations (Razevig 2003, Uglesic 2009). The probability of an outage depends on many factors which are statistical in nature that a worst case design is neither practical nor economical.…