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现今全世界寻找补充能源,以扩大总的动力资源的趋势正在加强;而研究发展小水电新的技术方案,弄清其合理的建设规模,就是这种趋势的一个方面。据有关资料报道,很多国家早在上个世纪就开始了中、小河流的水能利用,然而到近百年来才得到相当广泛的发展。法国1977年有978座小水电站(容量小于1,000千瓦),总装机容量为49万千瓦,发电量为18亿度。瑞典现今运行的小水电站有1,050座,共装机1,350台,总容量为55万千瓦,每年发电20亿度。日本1977年运行的小水电站有1,350座,总装机
Nowadays, the world is looking for supplemental energy sources to expand its overall power resources. The research and development of new technical schemes for small hydropower to clarify its reasonable construction scale is one aspect of this trend. According to relevant data, many countries started the use of water energy in the middle and small rivers as early as the last century, but it has only been widely developed in the past 100 years. In 1977, France had 978 small hydropower stations (capacity less than 1,000 kilowatts), with a total installed capacity of 490,000 kilowatts and a power generation of 1.8 billion kWh. There are 1,050 small hydropower stations in operation in Sweden, with a total installed capacity of 1,350 units and a total capacity of 550,000 kilowatts, generating 2 billion kilowatt-hours of electricity each year. In Japan, there were 1,350 small hydropower stations in operation in 1977.