初始转速与导叶控制策略对变速抽水蓄能机组泵断电过程影响规律研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (11) : 102-110.

论文

陈永焱1，陈帝伊1，邓宇闻1，马程1，周叶2，孙慧芳3，周大庆4

作者信息 +

Effects of initial rotating speed and guide vane control strategy on pump power outage process of variable speed pumped storage unit

CHEN Yongyan1, CHEN Diyi1, DENG Yuwen1, MA Cheng1, ZHOU Ye2, SUN Huifang3, ZHOU Daqing4

Author information +

文章历史 +

摘要

在可变速抽水蓄能机组泵断电暂态过程中，因导叶关闭引起的压力波动、回流、转速双峰等不利现象，极大影响了机组及压力管道系统的安全运行；初始转速作为影响机组动态特性的重要参数，其对泵断电过程中转速、流量的影响规律尚不明晰。针对以上问题，基于一维瞬变流理论特征线法和改进Suter变换法，构建可变速抽水蓄能机组调节系统模型。通过对可变速抽水蓄能机组泵断电过程进行模拟，分析了导叶关闭时间对特征参数的影响规律，阐明了初始运行转速与倒流流量、反转转速极值之间的内在联系。结果表明，正转正流阶段和正转逆流阶段的初期各特征参数时域响应趋势极为相近；与此同时，对比不同导叶关闭时间的结果，得出由反转逆流阶段进入停机能够增强机组及压力管道系统安全性的结论；此外，在同一扬程和入力条件下，采用不同初始运行转速对泵断电过程进行模拟，得出流量、转速极值特性与初始运行转速呈负相关的结论。

Abstract

The adverse phenomena such as pressure fluctuations, backflow and double peaks in speed caused by the closing of the guide vane during pump outage condition of variable speed pumped storage units, which greatly affect the safe and stable operation of the units. The initial speed, as an important parameter affecting the dynamic characteristics of the unit, is not yet clear as to the law of its influence on the speed and flow rate during pump outage. To address the above problems, a model of the regulation system of variable speed pumped storage units is constructed based on the one-dimensional transient flow theory characteristic line method and the improved Suter transformation method. By simulating the pump outage process of variable speed pumped storage units, the influence law of the guide vane closing time on the characteristic parameters is analysed and the intrinsic link between the initial operating speed and the reversing flow and reversing speed poles is elucidated. The results show that the time domain response trends of the characteristic parameters are very similar during the positive velocity positive flow phase and the early positive velocity negative flow phase. Meanwhile, a comparison of the results of different guide vane closing times led to the conclusion that entering the shutdown from the negative velocity negative flow phase enhances the safety and stability of the unit. In addition, simulations of the pump disconnection process using different initial operating speeds at the same head and input power conditions led to the conclusion that the flow rate and speed extremes characteristics were negatively correlated with the initial operating speed.

导出引用

陈永焱1，陈帝伊1，邓宇闻1，马程1，周叶2，孙慧芳3，周大庆4. 初始转速与导叶控制策略对变速抽水蓄能机组泵断电过程影响规律研究[J]. 振动与冲击, 2024, 43(11): 102-110

CHEN Yongyan1, CHEN Diyi1, DENG Yuwen1, MA Cheng1, ZHOU Ye2, SUN Huifang3, ZHOU Daqing4. Effects of initial rotating speed and guide vane control strategy on pump power outage process of variable speed pumped storage unit[J]. Journal of Vibration and Shock, 2024, 43(11): 102-110

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