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(一)三峡枢纽需要大容量的水力机组长江是世界上最大河流之一,流域广阔,水力资源蕴藏十分丯富。三峡由于其地理位置,地形条件的优越,它控制了全江流域面积的55％和年迳流量的50％左右,在这里修建巨大容量之水电站为极理想之地址。 丯富的水力动力资源使三峡水电站的装机容量最少在1400万瓩以上,为求经济合理地进行开发,兴建电站,就要求设计与制造特大型的水力机组,以减少厂房尺寸,简化布置,改善运转条件和降低造价,特别由于三峡地区峡谷两岸峻峭,绵瓦数十里,厂房布置极感困难,大部分将为地下式建筑,对此要求更为突出。
(A) The Three Gorges Project requires large-capacity hydraulic power units. The Yangtze River is one of the largest rivers in the world. Its watershed is vast and its water resources are very rich. Due to its geographical location and topographical conditions, the Three Gorges control about 55% of the total river basin area and about 50% of the annual flow rate. It is an ideal address to build a huge hydropower station here. Due to abundant hydrodynamic resources, the installed capacity of the Three Gorges Hydropower Station is at least 14 million 瓩. In order to economically and reasonably develop and construct power stations, it is required to design and manufacture extra large hydraulic units to reduce the size of the plant, simplify layout and improve Operating conditions and lower costs, especially due to the steepness of the canyon in the Three Gorges area, tens of miles of cotton tile, plant layout extremely difficult, most of them will be underground type of construction, which requires more prominent.