水泵水轮机四象限曲线“S”特性量化评判方法的初步研究

Preliminary Study on the Quantitative Evaluation Method of “S” Characteristic of the Pump Turbine Four Quadrants Curves

水泵水轮机在四象限全特性曲线的"S"特性区域内水体流态极为复杂。"S"特性是影响机组过渡过程特性的重要因素。为了更好地研究确定"S"特性与机组过渡过程特性之间的内在联系,本文探索建立了一套特定的量化指标来评判四象限曲线"S"特性的优劣程度。该评判方法的关键在于,通过寻求机组过渡过程特性的主要影响因素,进而建立"S"特性曲线的平顺程度与过渡过程特征角之间的内在联系,从而利用过渡过程特征角的值的大小来评判"S"特性。同时,希望以此来反向指导抽水蓄能电站水泵水轮机的水力开发研究。

The pump turbine water flow pattern of is extremely complicated in the＂S＂characteristic area of the four quadrants full characteristic curve.The＂S＂characteristic is an important factor that affects the characteristics of unit transient process.In order to better research the relationship between the＂S＂characteristic and the characteristics of transient process,a set of specific quantitative indicator has been established to judge the degree of quality of the＂S＂characteristics.By Seeking the main influence factors of the transition process of the unit,the inherent relationship between the smoothness degree of the＂S＂characteristic curve and the transient characteristic angle is established,so that the S characteristic can be judged by the value of the transient characteristic angle.We expect that this quantitative indicator can reversely guide the hydraulic development research of the pump turbine in pumped storage power station.