NDLI: Dynamical assessment of a PTGS with time delay

Content Provider	IET Digital Library
Author	Liu, Gongcheng Chen, Diyi Li, Huanhuan Ye, Jiusan Zhang, Hao Liu, Jinyang Skjelbred, Hans Ivar Kong, Jiehong
Abstract	As power systems grow reliant on large-scale integration of renewable energy sources, pumped-storage power stations are being called on to provide greater adjustment capabilities. This study focuses on the stability and fast–slow dynamics of a pump-turbine governing system (PTGS). First, the time delay τ is considered into the PTGS since a lag in time exists between the signal and response in the hydraulic servo system. Second, six analytical expressions for the transfer coefficients of the guide vane opening in the process of wide-ranging load decrease are obtained utilising the complete characteristic curve of pump turbines. The effects of the time delay τ on system stability for the transient process are explored. Furthermore, considering the dynamic transfer coefficient e is a variable during the operation, the authors introduce the intermediate variable e as a periodic excitation into the PTGS. From the perspective of non-linear dynamics, the bursting oscillation behaviours of the multi-scale coupling system are analysed in detail. On the basis of practise engineering, the stability of the PTGS is studied in depth. All of the above methods and results supply the theoretical basis for maintaining a stable operation of pumped-storage power stations.
Starting Page	2594
Ending Page	2603
Page Count	10
ISSN	17521416
Volume Number	13
e-ISSN	17521424
Issue Number	Issue 14, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/13/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0252
Journal	IET Renewable Power Generation
Publisher Date	2019-07-25
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Aerodynamics Blades Control of Electric Power System Dynamic Transfer Coefficient Dynamical Assessment Fast–slow Dynamics Fluid Mechanics Greater Adjustment Capabilities Hydraulic Servo System Hydraulic Turbines Large-scale Integration Mechanical Component Mechanical Engineering Multiscale Coupling System Nonlinear Dynamics Power System PTGS Pump Turbines Pump-turbine Governing System Pumped Storage Stations And Plant Pumped-storage Power Stations Pumps Renewable Energy Source Servomechanisms System Stability Time Delay Transfer Coefficient Turbines
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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