摘要
为确定对小波动稳定性和调节品质最不利的工况,通过稳定域和数值计算分析小波动过渡过程最不利工况即控制工况的选取,研究了工况点的两个主要信息即工况点的负荷扰动以及工作水头对小波动稳定性的影响。实例应用结果表明,减负荷扰动越小,衰减度越小,调节品质越差;最小水头至额定水头之间的工况点的稳定性较额定水头至最大水头之间工况点的稳定性差,因而控制工况应该在最小水头至额定水头之间选择,对于低比转速水轮机,最小水头工况往往成为控制工况。
In order to determine the most unfavorable operating condition for the stability and regulation quality of small fluctuation process,the most unfavorable operating condition,namely the control operating condition of small fluctuation transient process is analyzed through the stability domain and numerical calculation.Two aspects of load disturbance and working head of operating condition were investigated about their influence on the stability of small fluctuation.Research results show that when the amplitude of load disturbance and the attenuation degree decrease,the regulation quality is poor.Operating conditions between the minimum head and the rated head appears a poorer regulation quality than those between the rated head and the maximum head.Therefore,the most unfavorable operating condition should be selected in the range of minimum head and rated head.As for the turbine with a low specific speed,it is found that the operating condition with the minimum head usually becomes the most unfavorable operating condition.
出处
《水电能源科学》
北大核心
2016年第2期166-168,207,共4页
Water Resources and Power
关键词
小波动过渡过程
控制工况
负荷扰动
工作水头
稳定域
数值计算
small fluctuation transient process
control operating condition
load disturbance
working head
stability domain
numerical calculation
