Constrained model based control for minimum-time start of hydraulic turbines

28th IAHR symposium on Hydraulic Machinery and Systems

Mesnage, Hugo^1 ; Alamir, Mazen^2 ; Perrissin-Fabert, Nicolas^3 ; Alloin, Quentin^3

Grenoble, 11 Rue des Mathématiques, Saint-Martin-d'Hères

38400, France^1

CNRS, Gipsa-Lab, Control Systems Department, France^2

GE Power (Formerly Alstom Renewable Power Hydro), RandD Process Control and Monitoring, United States^3

关键词: 2D graphical representation;    Constrained models;    Control profiles;    Controlled system;    First-order models;    Graphical representations;    Reduced model;    Vector fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/49/5/052009/pdf
DOI  :  10.1088/1755-1315/49/5/052009

来源: IOP

【 摘 要 】

This paper introduces a simplified model of hydraulic turbines including the hydraulic nonlinear hill-chart and a first order model of the penstock. Based on the resulting reduced model, a graphical representation of the vector fields of the resulting controlled system is obtained under band unlimited actuator. This ideal 2D-graphical representation enables an exact evaluation of the lower bound on the minimum achievable start-time as well as the time structure of the control profile. The consequences of the use of a band-limited actuator is also analyzed enabling a close estimation of the lower bound on the start time in practical situations.