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一、引言葛洲坝电站是长江上第一座大型低水头电站,总装机容量为271.5万千瓦,其中二江电厂装机96.5万千瓦,安装2台单机容量17万千瓦,5台12.5万千瓦机组;大江电厂装机175万千瓦,安装14台单机容量为12.5万千瓦机组。根据葛洲坝电站的水文、参数资料,机组需在8.3～27米水头范围运行,设计水头18.6米,在该水头范围若选用四叶片 A30转轮方案,考虑到 A30转轮适用的水头范围为10～22米,经试验表明,当使用水头超过23米时,A30转轮的强度安全余度显
I. INTRODUCTION The Gezhouba Hydropower Station is the first large-scale low-head hydropower station on the Yangtze River with a total installed capacity of 2.755 million kilowatts, of which 2.65 million kilowatts are installed in Erjiang Power Plant and 2 units of 170,000 kilowatts and 5 sets of 125,000 kilowatts are installed. Power plant installed 1.75 million kilowatts, the installation of 14 stand-alone capacity of 125,000 kilowatts units. According to the hydrological and parameter data of Gezhouba Hydropower Station, the unit shall be operated in the water head range of 8.3-27 meters and the designed water head shall be 18.6 meters. If the four-blade A30 rotor scheme is adopted in this head range, taking into account that the head range of A30 runner is 10 ~ 22 meters, the test shows that when the use of more than 23 meters head, A30 runner strength safety margin was significantly