考虑导叶分段关闭特性的水轮机调速系统改进模型  

Improved Model of Water Turbine Regulation System Considering Two-segment Closing Law of Guide Vanes

作　　者：唐昱恒 刘涤尘[1] 陈刚 孙文涛[1] 赵洁[1] 刘蔚 赵勇 熊卿 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]南方电网科学研究院,广东广州510080

出　　处：《水电能源科学》2014年第6期127-130,119,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51077103)

摘　　要：针对电力系统分析软件PSD-BPA中水轮机调速系统的执行机构模型不能有效反映实际特征且混流式水轮机模型仿真精度不高的问题,提出了考虑导叶分段关闭特性的执行机构模型,设置不同的分段点对机组甩负荷进行了仿真分析,并对计及功率与开度间非线性关系的混流式水轮机解析非线性模型进行研究。仿真及实测分析结果表明,考虑导叶分段关闭特性的水轮机调速系统改进模型能准确仿真混流式水轮机组导叶分段关闭规律,比BPA模型的开度及功率响应更切合实际,更能体现其有效性。The actuator mechanism model of Francis turbine regulation system in PSD-BPA can not effectively reflect the actual characteristics with low simulation precision. An improved model of actuator mechanism was proposed by considering two-segment closing law of guide vanes. The simulation analysis of unit load shedding is implemented by setting different segment closing law of guide vanes. And then the analytic nonlinear Francis turbine model is studied by considering nonlinear relationship between power and guide vane opening. Based on the field test, comparison of simulation results with measured data were presented. The results demonstrate that the improved model of Francis turbine regulation system are more realistic than the model of BPA and it can be applied to power system simulation analysis well, which simulates segment closing law of guide vanes effectively.

关 键 词：混流式水轮机 调速系统 执行机构 分段关闭特性 改进模型 电力系统仿真分析 

分 类 号：TM71[电气工程—电力系统及自动化]