摘要
水轮机运行中要考虑空化问题和稳定性问题,因此,有必要建立水轮机空化特性和压力脉动特性的数学模型。针对经过试验得到的水轮机空化特性和压力脉动特性相对应的空间曲面比较复杂的特点,本文研究用支持向量机对水轮机空化特性和压力脉动特性进行建模,并应用于四川紫坪铺水力发电厂中的水轮机空化特性和压力脉动特性的建模中。建模结果表明,水轮机空化特性和压力脉动特性的支持向量机双输出模型,能真实的表达水轮机的空化特性和压力脉动特性,并具有较强的泛化能力,可以在控制水轮发电机组的运行等方面得到应用。
The problems of cavitation and stability need to be taken into account during the hydraulic turbine operation,so it is necessary to establish the mathematical model which can express the cavitation and pressure fluctuation characteristics of hydraulic turbine.As the corresponding curve of the cavitation and pressure fluctuation characteristics,which was obtained from experiments,was too complex to be expressed by expressions.In this paper,a new modeling method using support vector machine was given,and was used in modeling the cavitation and pressure fluctuation characteristics of the turbine in Zipingpu Hydropower Station,Sichuan Province.Results show that the two outputs model which is based on support vector machine is in good agreement with the test results of the cavitation and pressure fluctuation characteristic,and it is good in generalization.So it can be applied to the operation controlling of generating sets.
出处
《现代机械》
2010年第4期22-24,共3页
Modern Machinery
关键词
支持向量机
水轮机
空化特性
压力脉动特性
support vector machine
hydraulic turbine
cavitation characteristics
pressure fluctuation characteristics
