排灌机械工程学报2013，Vol.31Issue(3)：230-235,252,7.DOI:10.3969/j.issn.1674-8530.2013.03.010
导叶关闭规律非线性评价函数及多工况优化
Non-linear evaluating function for wicket-gate closing rate optimization and multi-mode optimum method
摘要
Abstract
A non-linear evaluating function dealing with wicket-gate closing rate optimization was presented,and the muhi-operation point optimization method is proposed based on genetic algorithm.The wicket-gate closing rate of a real hydropower station was optimized by utilizing the proposed function and optimization model and the results were compared with those optimized by means of the existing linear evaluating function.For the optimized closing rate by using the linear evaluation function,the maximum speed rise is 49.4％,which is near the control value (50％),and the safe margin is 0.6％ only ; but the safe margins of both the maximum pressure at the end of spiral casing and the minimum pressure at the inlet of draft tube are 4.717 and 2.812 m,which are relatively high.For the closing rate optimized with the proposed non-linear evaluation function,however,although the safe margins of both the maximum pressure at the end of spiral casing and the minimum one at the inlet of draft tube drop to 2.501 and 1.765 m,the maximum speed rise is 46.1％ and the safe margin rises to 3.9％.The simulated results show that the optimized wicket-gate closing rate with the just proposed non-linear evaluating function can keep safety margin in a proper range for every optimization objective.Multioperation point optimization method is proven to be accurate and the optimized closing rate is universal to different hydro-transient cases.Such a method plus the proposed non-linear evaluating function can achieve a relatively equalized distribution of safety margin for every optimization objective in different cases.关键词
水电站过渡过程/导叶关闭规律/最大速率上升/优化计算/多工况优化Key words
transient process of hydropower station/wicket-gate closing law/maximum speed rise/optimization calculation / multi-mode optimum分类
农业科技引用本文复制引用
樊红刚,崔赫辰,陈乃祥..导叶关闭规律非线性评价函数及多工况优化[J].排灌机械工程学报,2013,31(3):230-235,252,7.基金项目
国家自然科学基金资助项目(50879037) （50879037）
水沙科学与水利水电工程国家重点实验室自主研究项目(2009-TC-3) （2009-TC-3）
