水电站调节保证计算中导叶关闭规律探讨

摘要

调节保证计算是水电站设计中的重要内容之一.水电站运行的过程中,为了最大限度的减少水压上升值与转速上升值,通过优化导叶折线关闭方式来解决过渡过程中水电站的运行安全问题是最经济的有效措施,而且技术上也容易实现.目前,普遍采用的两段或三段关闭规律.但是,理论上来讲,不管是两段还是三段关闭规律,都不是最优关闭规律.笔者从微积分的思想出发,提出了根据水轮机工作参数的变化实时地改变导叶关闭方式的非固定模式的导叶关闭方式,能更有效地提高水电站运行的稳定性和安全性.%The guaranty calculation of regulation is one of the important contents in the design of hydropower plant. During a hydropower operation, in order to minimize the water pressure and the hydraulic units' run-speed rising, optimizing the wicket gate closing law is the most economic way to solve the station operation security problem during the process of transient, and can be easily realized technically. At present, most hydropower plants close the wicket gate by using the closing law with two or three slopes. However, the closing law with two or three slopes that is not the best closing law. So, by the calculus way, the authors present a way that by using the unfixed wicket gate closing manner, which changes the closing law according to the turbine working parameters so as to greatly improve the units' stability and security in hydropower stations.