CAJ | 학술논문

根据有压管道非恒定流数学模型和特征线法，对某抽水蓄能电站3、4号机组双机甩负荷过渡过程进行了研究，将计算结果与试验实测数据进行了对比，证实了数值仿真的可性性；对机组水泵工况正常运行时突然断电的特殊过渡过程进行模拟，计算出导叶不同有效关闭时间下机组蜗壳末端动水压力等关键数据，据此分析出导叶最佳关闭时间。
근거유압관도비항정류수학모형화특정선법，대모추수축능전참3、4호궤조쌍궤솔부하과도과정진행료연구，장계산결과여시험실측수거진행료대비，증실료수치방진적가성성；대궤조수빙공황정상운행시돌연단전적특수과도과정진행모의，계산출도협불동유효관폐시간하궤조와각말단동수압력등관건수거，거차분석출도협최가관폐시간。
The transition process upon load rejection of the No.3 and No.4 generator units in a pumped storage hydro-power station is analyzed based on the mathematical model of unsteady flow in pressured pipe and the method of charac-teristics.Comparisons between the simulated results and the measured data from experiments confirm the correctness of the numerical simulation.Particularly, the transition process upon a sudden power-off is simulated for the turbine units under the normal pump operation condition.Key data such as the hydrodynamic pressures in the end of the turbine case with different effective closing time of the wicket gates are obtained.Then, an optimal closing time value is given.