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

LI Huokun; WAN Zihao; HUANG Wei; ZENG Min; FANG Jing; XIE Jie

doi:10.16511/j.cnki.qhdxxb.2022.21.033

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Journal of Tsinghua University(Science and Technology) ›› 2023, Vol. 63 ›› Issue (1) : 125-133. DOI: 10.16511/j.cnki.qhdxxb.2022.21.033

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

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Abstract

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.

Key words

turbine / specific speed / hydraulic transient / guide vane closure / robustness

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LI Huokun, WAN Zihao, HUANG Wei, ZENG Min, FANG Jing, XIE Jie. Robust comprehensive evaluation of guide vane closure law in hydraulic turbines in moderately-high head hydropower plants[J]. Journal of Tsinghua University(Science and Technology). 2023, 63(1): 125-133 https://doi.org/10.16511/j.cnki.qhdxxb.2022.21.033

References

[1] CHIRAG T, CERVANTES M J, BHUPENDRAKUMAR G, et al. Pressure measurements on a high-head francis turbine during load acceptance and rejection [J]. Journal of Hydraulic Research, 2014, 52(2): 283-297.
[2] ABREU J, CABRERA E, GARCIA-SERRA J, et al. Optimal closure of a valve for minimzing water hammer [M]//CABRERA E, ESPERT V, MARTíNEZ F. Hydraulic Machinery and Cavitation. Dordrecht: Springer, 1996: 661-670.
[3] AZOURY P H, BAASIRI M, NAJM H. On the optimum utilization of water hammer [J]. Proceedings of the Institution of Mechanical Engineers, Part A: Power and Process Engineering, 1988, 202(4): 249-256.
[4] 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. FAN H G, CUI H C, CHEN N X. Non-linear evaluating function for wicket-gate closing rate optimization and multi-mode optimum method [J]. Journal of Drainage and Irrigation Machinery Engineering, 2013, 31(3): 230-235, 252. (in Chinese)
[5] 王煜, 田斌. 对水轮机导叶最优关闭规律的探讨[J]. 三峡大学学报(自然科学版), 2007, 29(2): 113-115. WANG Y, TIAN B. Research for optimizing closing law of wicket gate of hydro-turbines [J]. Journal of China Three Gorges University (Natural Sciences), 2007, 29(2): 113-115. (in Chinese)
[6] 张健, 刘德有, 刘辉, 等. 江苏沙河抽水蓄能电站关闭规律与实测分析[J]. 水电能源科学, 2004, 22(2): 39-41, 63. ZHANG J, LIU D Y, LIU H, et al. Study on closing law and field test of Jiangsu Shahe pumped strorage station [J]. Water Resources and Power, 2004, 22(2): 39-41, 63. (in Chinese)
[7] 刘立志, 樊红刚, 陈乃祥. 抽水蓄能电站导叶关闭规律的优化[J]. 清华大学学报(自然科学版), 2006, 46(11): 1892-1895. LIU L Z, FAN H G, CHEN N X. Optimization of distributor closing law in pumped storage stations [J]. Journal of Tsinghua University (Science and Technology), 2006, 46(11): 1892-1895. (in Chinese)
[8] VAKIL A, FIROOZABADI B. Investigation of valve-closing law on the maximum head rise of a hydropower plant [J]. Scientia Iranica, 2009, 16(3): 222-228.
[9] 杨建东. 导叶关闭规律的优化及对水力过渡过程的影响[J]. 水力发电学报, 1999(2): 75-83. YANG J D. Optimization of wicket closure rule and influence on hydraulic transients for water power station [J]. Journal of Hydroelectric Engineering, 1999(2): 75-83. (in Chinese)
[10] WOZNIAK L, FETT G H. Optimal gate closure schedule for hydroelectric turbine system [J]. Journal of Fluids Engineering, 1973, 95(1): 47-52.
[11] 李敏, 张健, 俞晓东. 水轮机导叶“先快后慢”关闭规律适用性研究[J]. 水力发电学报, 2019, 38(3): 101-107. LI M, ZHANG J, YU X D. Application of quick-then-slow closing rule for turbine wicket gates [J]. Journal of Hydroelectric Engineering, 2019, 38(3): 101-107. (in Chinese)
[12] 黄伟, 杨开林, 郭新蕾, 等. 抽水蓄能电站极端甩负荷工况球阀协同调节[J]. 清华大学学报(自然科学版), 2019, 59(8): 635-644. HUANG W, YANG K L, GUO X L, et al. Coordinated regulation of ball valves in pumped storage power stations for extreme conditions [J]. Journal of Tsinghua University (Science and Technology), 2019, 59(8): 635-644. (in Chinese)
[13] 张美琴, 佟德利, 张树邦, 等. 超高水头水泵水轮机甩负荷导叶关闭规律分析[J]. 水电能源科学, 2020, 38(5): 139-143. ZHANG M Q, TONG D L, ZHANG S B, et al. Analysis of closing law of guide vane of load rejection for ultra-high head reversible unit [J]. Water Resources and Power, 2020, 38(5): 139-143. (in Chinese)
[14] 白家, 张莉云. 用正交设计法优化导叶分段关闭规律的参数[J]. 大电机技术, 1995(4): 53-57. BAI J, ZHANG L Y. Optimization of parameters for hydro guide vanes closed in steps with a orthogonal method [J]. Large Electric Machine and Hydraulic Turbine, 1995(4): 53-57. (in Chinese)
[15] 刘晓渠. 正交设计在水轮机两段关闭规律寻优中的应用[J]. 湖北水力发电, 1990(1): 36-40. LIU X Q. Application of orthogonal design in the optimization of two-stage closing law of hydraulic turbine [J]. Hubei Hydropower, 1990(1): 36-40. (in Chinese)
[16] 李季寰, 杨旭. 某水电站导叶关闭规律寻优研究[J]. 人民黄河, 2015, 37(7): 107-109. LI J H, YANG X. Optimization research on the closure law of wicket in a hydropower [J]. Yellow River, 2015, 37(7): 107-109. (in Chinese)
[17] WYLIE E B, STREETER V L, SUO L S. Fluid transients in systems [M]. Englewood Cliffs, NJ: Prentice Hall, 1993.
[18] HUANG W, MA J M, GUO X L, et al. Stability criterion for mass oscillation in the surge tank of a hydropower station considering velocity head and throttle loss [J]. Energies, 2021, 14(17): 5247.
[19] 侯靖, 李高会, 李新新, 等. 复杂水力系统过渡过程[M]. 北京: 中国水利水电出版社, 2019. HOU J, LI G H, LI X X, et al. Hydraulic transients of complex hydraulic system [M]. Beijing: China Water Conservancy and Hydropower Press, 2019. (in Chinese)
[20] 中华人民共和国水利部. 水利水电工程调压室设计规范: SL 655-2014[S]. 北京: 中国水利水电出版社, 2014. Ministry of Water Resources of the People's Republic of China. Desigin specifications for surge chamber of water resources and hydropower projects: SL 655-2014[S]. Beijing: China Water Conservancy and Hydropower Press, 2014. (in Chinese)