多机共尾水调压室流道结构水轮机调节振荡研究  

Study on regulating oscillation in multi hydro turbine generators sharing flow channel structure of tailrace surge tank

作　　者：张辉[1] 胡钋[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉443000

出　　处：《水利学报》2015年第2期229-238,共10页Journal of Hydraulic Engineering

摘　　要：水轮发电机组调节系统的调节品质已成为现代电力系统运行和控制的重要指标之一。本文研究了多台水轮发电机组共用尾水调压室流道结构及其相应的数学模型,数值仿真及实际录波分析的结果表明,多机之间的调节过程存在互相干涉的现象且可造成控制过程的振荡,通过数学模型分析进而得出大扰动下产生系统振荡的成因参数。其后以3台机组共用尾水调压室为例,通过分析包括流道水力结构的控制系统传递函数,选取水轮机调节系统为优化方向,设计了振荡控制器并为其选取了合适的参数,可抑制因多机共用尾水调压室水工结构而形成的调节振荡,实现动态过程的加速收敛与稳定。现场试验证明了控制器的有效性。The regulating quality of hydro turbine generator governor system has become one of the impor-tant indicators in modern power systems. This paper presents multi hydro turbine generators sharing flowchannel structure of tailrace surge tank and the corresponding mathematical model,the analysis results ofmathematical simulation and actual recording indicate that the mutual interference phenomenon betweenmulti hydro turbine generators exists and can cause control process oscillation during the regulating process.The parameters that cause oscillation in large disturbance are analyzed through mathematical model. In thispaper,taking 3 hydro turbine generators which share flow channel structure of tailrace surge tank as an ex-ample,and by analyzing control system transfer function which includes the channel hydraulic structure,hy-dro turbine regulating system is selected as an optimize direction, and oscillation controller is designedwith appropriate parameters in order to restrain regulating oscillation caused by such flow channel structureand implement acceleration of convergence and stability in dynamic control process. The field test provesthe effectiveness of the proposed controller.

关 键 词：流道结构 尾水调压室 水轮机调节 状态方程 振荡控制 

分 类 号：TK730.2[交通运输工程—轮机工程]