中高水头水电站水轮机导叶关闭规律鲁棒性综合评价  

Robust comprehensive evaluation of guide vane closure law in hydraulic turbines in moderately-high head hydropower plants

作　　者：李火坤[1] 万子豪 黄伟[1] 曾敏 方静 谢杰 LI Huokun;WAN Zihao;HUANG Wei;ZENG Min;FANG Jing;XIE Jie(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China;Department of Hydraulic Engineering,Jiangxi Water Resources Institute,Nanchang 330013,China)

机构地区：[1]南昌大学工程建设学院,南昌330031 [2]江西水利职业学院水利工程系,南昌330013

出　　处：《清华大学学报（自然科学版）》2023年第1期125-133,共9页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金青年项目(51909115);江西省自然科学基金青年项目(20192BAB216038);江西省水利厅科技课题(202123YBKT04);中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放研究基金项目(IWHR-SKL-KF201904)。

摘　　要：水电站的导叶关闭规律影响水力瞬变过程,应具有良好的鲁棒性能。本文运用罚函数和权函数从蜗壳水压最大上升率、尾水管最大真空度、机组转速最大上升率等3个方面对水轮机大波动过渡过程评价指标进行分析,构建了导叶关闭规律鲁棒性的综合评价方法。采用正交试验法,评估了中高水头水电站不同拐点时间、拐点开度和导叶有效关闭时间对这3个调节保证参数的影响。结果表明:导叶有效关闭时间对调节保证参数的影响相对较小,而拐点开度和拐点时间显著影响水锤压强和机组转速之间的平衡。导叶关闭规律的综合评价结果不仅可使各调保参数具有足够的安全裕度,而且具备良好的鲁棒性,可为中高水头水电站导叶关闭规律的合理选择提供参考。The closing law of guide vane in hydropower station affects the resulting hydraulic transients,which should have good robust performance.A comprehensive evaluation method for the robustness of guide vane closing law is constructed by using a penalty function and a weight function to generate the evaluation indexes of the hydraulic turbine’s large fluctuation transition process from maximum rise rate of spiral case pressure,maximum draft tube vacuum,and maximum rise rate of rotational speed.The effect of various inflection point times,inflection point opening degrees,and guide vane effective closing times for a moderately-high head hydropower station on these three regulating guarantee parameters were evaluated by the orthogonal experimental method.The results show that the effective closing time has a relatively small influence on these three regulating guarantee parameters,while the inflection point opening degree and the inflection point time significantly affect the balance between the water hammer pressure and the unit’s speed.These evaluation results for the guide vane closing process not only lead to each regulating guarantee parameter having sufficient safety margin,but also to a robust control system.This robustness evaluation method provides a reference for reasonable selection of guide vane closing law of moderately-high head hydropower plants.

关 键 词：水轮机 比转速 水力过渡过程 导叶关闭规律 鲁棒性 

分 类 号：TV741[水利工程—水利水电工程]