Research on the volute pressure in start-up process of hydroelectric generating units
Research on the volute pressure in start-up process of hydroelectric generating units
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DOI：
10.1088/1755-1315/15/4/042018
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发表时间：
2012-11
期刊：
影响因子：
--
通讯作者：
W. J. Yang;J. Yang
中科院分区：
文献类型：
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作者：
W. J. Yang;J. Yang
水轮发电机组启动过程中的动态品质直接影响电力系统的稳定性和水电站的经济效益。然而，现有的研究只关注机组转速的快速性和稳定性，没有对蜗壳压力等控制条件进行分析，而忽视了机组运行的安全性。本文强调，在分析启动过程时，应将蜗壳压力作为重要的评价指标。本文采用考虑水轮机特性和管道弹性的非线性数学模型，对水轮发电机组启动暂态过程进行了计算和分析，寻求蜗壳压力的变化规律，并以某水电站调压室长引水隧洞为工程实例。为了探讨蜗壳压力的影响因素，本文还对启动策略、启动工况和管道特性进行了敏感性分析。同时，针对各种因素，提出了保证启动过程的快速性和安全性的建议。
The dynamic quality in start-up process of hydroelectric generating units has a direct influence on power system stability and economic benefits of hydropower stations. However, the existing researches just focus on the rapidity and stability of unit rotation speed, never analyze the volute pressure or other control conditions, and ignore the security of unit operation. This paper strongly emphasizes that the volute pressure should be regarded as an important evaluation index in analysis of start-up process. By using a nonlinear mathematical model which takes into account the turbine characteristics and elasticity of the pipeline, this article calculates and analyzes the start-up transient process of hydroelectric generating units to seek the change law of volute pressure, and the engineering example is a hydropower station with the surge chamber and long draw water tunnel. To discuss the influence factors of the volute pressure, this paper also makes sensitivity analysis of start-up strategy, start-up working conditions and characteristics of pipeline. Meanwhile, according to various factors, this paper provides some suggestions to guarantee the rapidity and security of the start-up process simultaneously.