--孤立微电网与可再生混合发电.docx
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1、外文翻译中文题目:孤立微电网与可再生混合发电Isolated Micro-Grids With Renewable HybridGeneration: The Case of Lengois IslandAbstract-In Brazil, around 2 000 000 families have not been connected to an electricity grid yet. Out of these, a significant number of villages may never be connected to the national grid due to th
2、eir remoteness. For the people living in these communities, access to renewable energy sources is the only solution to meet their energy needs. In these communes, the electricity is mainly used for household purposes such as lighting. There is little scope for the productive use of energy. It is rec
3、ognized that electric service contributes particularly to inclusive social development and to a lesser extent to pro-poor growth as well as to environmental sustainability. In this paper, we present the specification, design, and development of a standalone micro-grid supplied by a hybrid wind-solar
4、 generating source. The goal of the project was to provide a reliable, continuous, sustainable, and good-quality electricity service to users, as provided in bigger cities. As a consequence, several technical challenges arose and were overcome successfully as will be related in this paper, contribut
5、ing to increase of confidence in renewable systems to isolated applications.Index Terms-Hybrid energy systems, solar energy, standalone micro-grids, wind energy.1. INTRODUCTIONThe motivation behind the use of renewable energy sources is the reduction of CO emissions and improve-ment of human kinds q
6、uality of life. This is especially true in isolated, standalone, small islands where the access to renewable energy sources is the only solution to meet their energy needs. An alternative is the use micro-grid supplied by centralized hybrid systems, where the combination of several natural resources
7、 guarantees a steady energy generation. Micro-grids are the centralized alternative to distributed one to supply electrical energy to homes in isolated communities. The main advantages are relative lesser maintenance cost and best exploration of the installed power.In recent years, a growing interes
8、t for micro-grids has been observed in the technical literature. Recent technical publications include analytical modeling, studies focusing operation and performance, pilot projects, and other advanced topics. Is-sues related to voltage controller design methods for dc-ac converters supplying power
9、 to a microgrid and protections have been addressed by several recent works l-5. In 6, the feasibility of control strategies to be adopted for the operation of a micro-grid when it becomes isolated are described and evaluated. In 7, the operation of a central controller for micro-grids is described.
10、 The goal is to optimize interconnected operation, by optimizing the production of the local distributed generations (DGs) and power exchanges with the main distribution grid. In 8, an overview of the micro-grid operation is presented including experiences from different countries. In 9-l 1, relevan
11、t issues related to dynamic behavior of micro-grids both under grid connected and autonomous operation are covered.Even though there are different kinds of combinations of internal energy sources 12, a common combination for isolated micro-grids is the solar photovoltaic and wind turbines 13. These
12、systems have shown to be adequate for standalone applications in areas of difficult access 14, 15 being responsible for the decreasing or even the elimination of diesel usage. In 16, an interesting review of practical applications using hybrid systems is presented. The major problems reported are re
13、lated to cost, performance, and reliability, and institutional problems. These challenges have required considerable effort to achieve small isolated systems that are both economically and technically sustainable.In order to optimize the design and operation of hybrid systems, several papers have be
14、en published. In 17, the optimal design of a hybrid wind-solar power system for either autonomous or grid-linked applications is proposed. The method employs linear programming techniques to minimize the average production cost of electricity while meeting the load requirements in a reliable manner,
15、 and takes environmental factors into consideration both in the design and operation phases. In 18, an automatic procedure to perform the optimal sizing of a grid connected hybrid solar wind power system based on fuzzy logic and multiobjective optimization has been proposed. Both technical and econo
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- 孤立 电网 再生 混合 发电
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