某水电站导叶关闭规律寻优研究

摘要

On the basis of robustness,this study had optimized closing law by automatic detailed search,and drew extreme nephograms of multi-variable about break point. Favorable laws were separated from adverse closing laws significantly from nephograms,which included bet-ter robustness and adaptability of uncertain factor. Although closure law region was largely adjusted to optimize security parameters,a com-plex closed rule should be set to achieve better robustness when numerical method was employed to simulate the in-situ case,and this situa-tion would become worse in the pumped power station,whose flow characteristics had the S-feature. Therefore,an optimization method based on the closure law region would reduce the errors between the numerical method result and the actual case.%在考虑关闭规律鲁棒性的情况下进行导叶关闭规律优化，绘制多个控制变量极值与折点位置的云图，通过云图的叠加可以清晰区分出考虑多种调节保证参数下的有利和不利的关闭规律域。折线导叶关闭规律虽然在很大程度上能够优化调节保证参数，但在用数值模拟的方法为电站实际运行情况制定并优化关闭规律时，应使关闭规律具有较好的鲁棒性，特别是对于抽水蓄能电站，机组存在倒S等的过流特性使得其压力升高出现多峰性，常常需要设置延时等复杂的关闭规律，同时压力对关闭规律的变化特别敏感，从关闭规律域的角度来优化关闭规律，可以在一定程度上避免未知因素可能引起的数值计算与实际运行之间存在差异的风险，考虑一定变动幅度的关闭规律具有更好的适应性和安全性。