Title :
Wide-area damping control reckoning with feedback signals’ multiple delays
Author :
Wang, Shaobu ; Yi, Yonghui ; Liu, Zhaoyan ; Jiang, Quanyuan ; Cao, Yijia
Author_Institution :
Dept. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
WAMS (wide-area measurement systems) involve all kinds of communicating channels. Different channels have different time delays and randomicity of time-delay. So closed-loop power systems ought to be modeled as nonlinear dynamic systems with multiple time delays and varying time delays. A method is proposed in this paper to design a controller that can adapt to feedback signals with multiple time delays and varying time delays. The method is based on the topological characteristics of stable time-delay regions, the LMIs (linear matrix inequalities) method, GA (genetic algorithm) and the balanced truncation model-reduced algorithm. Numerical results form a tow-area four-machine power system demonstrate that the controller derived from the above method can damp low-frequency oscillations in the system for the feedback signals with multiple time delays and varying time delays.
Keywords :
closed loop systems; damping; delays; genetic algorithms; linear matrix inequalities; nonlinear dynamical systems; power system control; power system measurement; GA; LMI; WAMS; balanced truncation model-reduced algorithm; closed-loop power system; communication channel; feedback signal multiple delays; genetic algorithm; linear matrix inequalities; nonlinear dynamic system; topological characteristics; wide-area damping control; wide-area measurement system; Damping; Delay effects; Feedback; Genetic algorithms; Linear matrix inequalities; Power system dynamics; Power system measurements; Power system modeling; Signal design; Wide area measurements; Power systems; damping control; multiple time delays; varying time delays; wide-area measurement systems;
Conference_Titel :
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Conference_Location :
Pittsburgh, PA
Print_ISBN :
978-1-4244-1905-0
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2008.4595988