No description available.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. Abstracted in Dissertation abstracts, v. 17 (1957) no. 2, p. 261. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 237-249).

Station Service Voltage Transformer (SSVT) is a special class of single-phase high voltage instrument transformer with a power winding and optional metering winding at the secondary. The SSVT is capable of being connected directly to the transmission line and providing 120 to 480 V at the secondary power terminals and 115 V at the metering terminals. The power rating of the secondary is normally anywhere from 25 kVA up to 333 kVA. The SSVT was initially developed as a means to provide control power in a substation without the need for stepdown and distribution transformers. Over time, the properties of the SSVT made it an ideal power source for many different applications. Today the SSVT is being installed in numerous applications around the world. Some typical applications include but are not limited to: remote cell towers, transmission tower lighting, oil and gas, mining projects, substation auxiliary power and rural electrification. In any of the listed applications, it is still necessary to acquire accurate revenue metering for the power companies to charge for power usage. In many cases this requires the installation of instrument transformers to perform the metering. Unfortunately, the metering and power windings of the SSVT cannot be operated simultaneously. When a load is applied to the power winding on the SSVT, a load current is reflected back into the primary winding. This current generates a drop in voltage through the primary reactance and resistance. It is these values which are reflected back into the metering winding. The accuracy of the metering winding will fall out of acceptable limits when the voltage drop is present. This research proposes a new method to provide both power and accurate metering, simultaneously, in a dual secondary SSVT. The accuracy of the metering winding remains essentially unaffected by the load on the power winding if the load is less than the maximum rating of the compensator. The result is a single transformer capable of replacing the functionally of two separate transformers. This new approach will have a broad impact in the development of future substation designs.

No description available.

In this thesis I study the impact of electrification using solar photovoltaic panels in the rural Ecuadorian community of Las Balsas. Many large-scale development organizations like the World Bank promote small-scale renewable energy technologies like solar photovoltaics as being crucial in helping poor rural communities generate more income. My research however, both in the field and in the literature, shows income generation from these projects tends to be minimal. I find that the introduction of solar electrification is most important for social applications like music, movies, cell phones, and lighting. FEDETA, the NGO that installed the solar photovoltaics, promotes the development project not as a neoliberal market-based income-generation project, but rather as a humanistic improvement in the “quality of life” of local residents. I analyze this goal of the project in light of the development theories developed over the past few decades. I question how well solar photovoltaics fits into the “small is beautiful” appropriate technology sector. While solar photovoltaic systems have the potential to build small-scale islands of autonomous electricity production in a more environmentally sustainable manner than grid electricity based on fossil fuels, I caution that this is not necessarily the most equitable way to provide electricity to the rural poor in developing countries. While solar home systems have much potential to provide (often minimal amounts of) electricity to extremely rural areas, the service provided is in many cases inferior to grid electricity. While solar photovoltaic technology does provide many potential benefits in areas not reached by grid electricity, NGOs and policy makers should be wary of seeing the technology as a panacea for sustainable development. Solar photovoltaics as a technology has a long way to go to provide energy services comparable to that offered by most grid systems. As with any technology its actual use is not predetermined, but rather is influenced by the local social and cultural contexts. / text

The recent awareness created by the UN Secretary General on the need to provide universal energy for all by 2030, which culminated in the declaration of 2012 as the “International Year of Sustainable Energy for All”, laid particular emphasis on the challenge of funding rural electrification in developing countries, and the need for innovative ways and financing options to be developed at national, regional and global levels towards achieving the ‘energy for all’ target of 2030. This research, as part of efforts towards remedying the rural electrification scourge of developing countries, particularly in Nigeria, provides financing options for rural electrification as far as the Nigerian Electricity Supply Industry (NESI) context is concerned. The study does this by first identifying appropriate least-cost electrification supply mode (Grid, Mini-grid and Off-grid), and estimating the financing requirement for providing universal energy access to rural Nigeria by 2030, using a spatial electricity planning model called the ‘Network Planner’. Results from this research shows that by the end of the seventeen year planning period (2013-2030), 98% of currently un-electrified communities will be viable for grid expansion, while only 2% will be mini-grid compatible. This is based on a proposed MV line extension of 12,193,060 metres or (12,193 kilometres), LV line length proposal of 711,954,700 metres or (711,954 kilometres), and an estimated total cost of US$34.5 billion investment within the planning period. More so, a total number of 28.5 million households are to be electrified by 2030, which is equivalent to an estimated 125million people to be provided electricity by 2030.The analysis was done for the 36 states of Nigeria and the entire country, using data from the 774 Local Government Areas of Nigeria. In addition to the Rural Electrification Fund (REF) of the FGN, which gets funding from yearly budgetary allocations from the FGN, fines obtained by NERC, surplus appropriation, interests accruing to the REF and donations from various sources, the following financing options were recommended for rural electrification in Nigeria: The establishment of a Renewable Energy Development Charge (REDC); The establishment of a Rural Electrification Fund Tax (REFT) Law; adopting rural electrification as part of Corporate Social Responsibilities (CSR) for oil and other companies; Exploring the option of Crowd-funding; and Establishing a Renewable Energy Private Equity Fund in Nigeria.

0 atendimento energético a pequenas comunidades rurais na Amazônia e extremamente incipiente, porque as políticas energéticas adotadas para a zona rural no Brasil priorizam apenas os aspectos técnico-econômicos, bem como a eletrificarao via conexão à rede. Com o advento do desenvolvimento sustentável, essa postura tem recebido muitas críticas, porque negligência os aspectos sócio-ambientais. Esta dissertação apresenta uma estrutura de planejamento energético, compatível com os preceitos do desenvolvimento sustentável, para ser utilizada como mecanismo de avaliação de alternativas energéticas para pequenas comunidades da Amazônia. Nos quatro primeiros capítulos, desenvolvem- se análises críticas sobre o conceito de desenvolvimento, o contexto amazônico e a problemática energética rural. Com base nessas análises, identifica-se o desenvolvimento sustentável como a filosofia de desenvolvimento mais adequada para a Amazônia, porque ela prioriza o atendimento das necessidades básicas da população, e detecta-se que a carência energética amazônica a determinada pela implementação de políticas energéticas centralizadoras, que tern nos critérios técnico-econômicos, os únicos para viabilizar os programas de energização rural. Nos capítulos subsequentes, aplica-se a estrutura de planejamento energético elaborada, tendo como estudo de caso a comunidade do igarape Combu, localizada na Ilha do Combu, Município de Belém, Estado do Pará. Entre as conclusões deste estudo, destaca-se a necessidade da incorporação do planejamento energético nos programas de energização rural, visando identificar as alternativas de oferta mais adequadas, em termos econômicos e ambientais , a partir do conhecimento de hábitos e poder aquisitivo da população a ser beneficiada pelos programas de atendimento, para atender as demandas energéticas das pequenas comunidades da Amazônia. / The energy supply for small rural communities in Amazon is extremely poor, because of the energy policies adopted for rural areas. These Brazilian policies prioritize only the economical and technical aspects, such as electrification from the electric grid. With the advent of sustainable development that posture has received some critics, because it ignores environmental and social aspects. This dissertation presents a framework for the energy planning, compatible with the precepts of sustainable development, to be used as an evaluation mechanism for energy alternatives in small communities from Amazon. The first four chapters show a critical analysis about the concept of development, the Amazon context and the rural energy problems. Based in these analyses, the sustainable development is identified as the philosophy more adequate for the Amazon, because it prioritizes the basic needs supply. The adoption of centralized energy policies, based on economical and technical criteria, are taken as responsibles for the lack of energy observed in Amazon. The last chapters apply the energy planning framework elaborated. The community of Igarape Combu, localized in Combu island, a district of Belem city, in Para State is taken as a study case. Among the conclusions, the work highlights the necessity of the energy planning incorporation for rural areas, in order to identify the more adequate alternatives, economically and environmentally sounding and based on people income and behave, aiming energy and basic needs supply for small communities from Amazon.

Rural areas of Cameroon have limited to no availability of grid-supplied electricity, however many locations have significant hydro potential. Pico hydro (less than 5 kW generation capacity) has been identified as a promising means for rural electrification. Tests of previously implemented designs and field research in Cameroon were conducted to contextualize the design process. Field research involved end-user and artisan interviews, market research, site investigations, and artisan collaboration. Findings were used to select an axial flow propeller for the improved turbine. Detailed design used turbomachinery theory towards the development of a locally manufactured low head pico hydro turbine for rural electrification. A propeller turbine with complex blade geometries was designed but simplified to incorporate flat blade geometries to better suit the local manufacture capabilities. A prototype turbine was built and tested. The flat blade propeller turbine performed reasonably well, but was unable to achieve desired power generation targets with predefined head and flow rate conditions.

Thesis (M.S.)--Humboldt State University, 2009. / Includes bibliographical references (leaves 168-172). Also available via Humboldt Digital Scholar.

0 atendimento energético a pequenas comunidades rurais na Amazônia e extremamente incipiente, porque as políticas energéticas adotadas para a zona rural no Brasil priorizam apenas os aspectos técnico-econômicos, bem como a eletrificarao via conexão à rede. Com o advento do desenvolvimento sustentável, essa postura tem recebido muitas críticas, porque negligência os aspectos sócio-ambientais. Esta dissertação apresenta uma estrutura de planejamento energético, compatível com os preceitos do desenvolvimento sustentável, para ser utilizada como mecanismo de avaliação de alternativas energéticas para pequenas comunidades da Amazônia. Nos quatro primeiros capítulos, desenvolvem- se análises críticas sobre o conceito de desenvolvimento, o contexto amazônico e a problemática energética rural. Com base nessas análises, identifica-se o desenvolvimento sustentável como a filosofia de desenvolvimento mais adequada para a Amazônia, porque ela prioriza o atendimento das necessidades básicas da população, e detecta-se que a carência energética amazônica a determinada pela implementação de políticas energéticas centralizadoras, que tern nos critérios técnico-econômicos, os únicos para viabilizar os programas de energização rural. Nos capítulos subsequentes, aplica-se a estrutura de planejamento energético elaborada, tendo como estudo de caso a comunidade do igarape Combu, localizada na Ilha do Combu, Município de Belém, Estado do Pará. Entre as conclusões deste estudo, destaca-se a necessidade da incorporação do planejamento energético nos programas de energização rural, visando identificar as alternativas de oferta mais adequadas, em termos econômicos e ambientais , a partir do conhecimento de hábitos e poder aquisitivo da população a ser beneficiada pelos programas de atendimento, para atender as demandas energéticas das pequenas comunidades da Amazônia. / The energy supply for small rural communities in Amazon is extremely poor, because of the energy policies adopted for rural areas. These Brazilian policies prioritize only the economical and technical aspects, such as electrification from the electric grid. With the advent of sustainable development that posture has received some critics, because it ignores environmental and social aspects. This dissertation presents a framework for the energy planning, compatible with the precepts of sustainable development, to be used as an evaluation mechanism for energy alternatives in small communities from Amazon. The first four chapters show a critical analysis about the concept of development, the Amazon context and the rural energy problems. Based in these analyses, the sustainable development is identified as the philosophy more adequate for the Amazon, because it prioritizes the basic needs supply. The adoption of centralized energy policies, based on economical and technical criteria, are taken as responsibles for the lack of energy observed in Amazon. The last chapters apply the energy planning framework elaborated. The community of Igarape Combu, localized in Combu island, a district of Belem city, in Para State is taken as a study case. Among the conclusions, the work highlights the necessity of the energy planning incorporation for rural areas, in order to identify the more adequate alternatives, economically and environmentally sounding and based on people income and behave, aiming energy and basic needs supply for small communities from Amazon.