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岳城水电站位于漳河流域的岳城水库,1970年11月建成投产。电站厂房位于大坝后50多米处,压力引水管道置于坝下泄洪洞内,全长323米。当时由于各种原因,电站未设置调压井,虽然将引水管道直径由4.6米加大到5米,但管道的水流加速时间常数仍然达到3.7秒,致使轴流转桨式机组的调节保证计算值(最大水压上升为最高水头的50%,最大转速上升为额定转速的72%)偏高,成为电站安全运行中的一个严重隐患。
Yuecheng Hydropower Station is located in the Yue River Reservoir Zhanghe River Basin, completed and put into production in November 1970. Power plant is located more than 50 meters after the dam, pressure diversion pipe placed in the dam spillway tunnel, a total length of 323 meters. At that time, due to various reasons, the regulator did not set the surge shaft, although the diameter of the diversion pipe increased from 4.6 meters to 5 meters, but the pipe flow acceleration time constant still reached 3.7 seconds, resulting in axial flow propeller adjustment regulation Value (the maximum water pressure rose to 50% of the maximum head, the maximum speed rose to 72% of rated speed) is high, as a serious safety hazard in power plant operation.