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在进行水电站水轮机选择及水电站运行方式中,确定下游最大下泄量时,经常就碰到关于“计算水头”的问题,而这一特征水头的概念,各有不同的见解,其确定的方法,目前尚无定论,具体对长江流域超巨型水电站而言,如何正确的决定机组计算水头是值得深入研究和探讨的。所谓机组计算水头Hp(图1),我们同意苏联动能专家夏维列夫教授的说法,就是“在计算功率因素cosф的条件下,水轮机和发电机发出全部出力所需的最小水头,如果水头较大,则机组出力就要受到发电机出力的限制,当cosф相同时,出力也是相同的,当水头低于机组计算水头时,机组的出力就会随着水轮机预想出力的降低而相应的
In the selection of hydropower stations and hydropower station operation mode, to determine the maximum downstream discharge, often encountered on the “calculation of the head” problem, and the characteristics of the concept of head, each with different opinions, the method of determining the current There is no conclusion. For the super giant hydroelectric station in the Yangtze River Basin, how to determine the correct head of the unit is worth further study and discussion. The so-called crew calculation head Hp (Figure 1), we agree with the Soviet kinetic energy expert Professor Xia We Lev said that "in the calculation of the power factor cosф conditions, the turbine and generator to issue all the minimum required head, if the head is more The output of the unit will be limited by the output of the generator. When the cosφ is the same, the output will be the same. When the head is lower than the head of the unit, the output of the unit will decrease as the expected output of the turbine decreases