Free-weighting matrices-based robust wide-area FACTS control design with considering signal time delay for stability enhancement of power systems

2011 ◽  
Vol 7 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Fang Liu ◽  
Ryuichi Yokoyama ◽  
Yicheng Zhou ◽  
Min Wu
Keyword(s):  
Time Delay ◽  
Power Systems ◽  
Control Design ◽  
Wide Area ◽  
Stability Enhancement ◽  
Signal Time

scholarly journals H∞Excitation Control Design for Stochastic Power Systems with Input Delay Based on Nonlinear Hamiltonian System Theory

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Weiwei Sun ◽  
Lianghong Peng ◽  
Ying Zhang ◽  
Huaidan Jia
Keyword(s):  
System Theory ◽  
Time Delay ◽  
Hamiltonian System ◽  
Power Systems ◽  
Control Design ◽  
Area Measurement ◽  
Random Fluctuation ◽  
Control Law ◽  
Excitation Control ◽  
Nonlinear Hamiltonian System

This paper presentsH∞excitation control design problem for power systems with input time delay and disturbances by using nonlinear Hamiltonian system theory. The impact of time delays introduced by remote signal transmission and processing in wide-area measurement system (WAMS) is well considered. Meanwhile, the systems under investigation are disturbed by random fluctuation. First, under prefeedback technique, the power systems are described as a nonlinear Hamiltonian system. Then theH∞excitation controller of generators connected to distant power systems with time delay and stochasticity is designed. Based on Lyapunov functional method, some sufficient conditions are proposed to guarantee the rationality and validity of the proposed control law. The closed-loop systems under the control law are asymptotically stable in mean square independent of the time delay. And we through a simulation of a two-machine power system prove the effectiveness of the results proposed in this paper.

scholarly journals Optimal robust stabilizer design based on UPFC for interconnected power systems considering time delay

2017 ◽  
Vol 66 (3) ◽  
pp. 459-474
Author(s):  
Hamid Reza Koofigar ◽  
Ghader Isazadeh
Keyword(s):  
Time Delay ◽  
Power Systems ◽  
Power Flow ◽  
Controller Design ◽  
Design Procedure ◽  
Pole Placement ◽  
Wide Area ◽  
Linear Matrix ◽  
Unified Power Flow Controller ◽  
Input Signals

AbstractA robust auxiliary wide area damping controller is proposed for a unified power flow controller (UPFC). The mixedH2/H∞problem with regional pole placement, resolved by linear matrix inequality (LMI), is applied for controller design. Based on modal analysis, the optimal wide area input signals for the controller are selected. The time delay of input signals, due to electrical distance from the UPFC location is taken into account in the design procedure. The proposed controller is applied to a multi-machine interconnected power system from the IRAN power grid. It is shown that the both transient and dynamic stability are significantly improved despite different disturbances and loading conditions.

scholarly journals Adaptive Wide-Area Damping Control Scheme for Smart Grids with Consideration of Signal Time Delay

Energies ◽  
2013 ◽  
Vol 6 (9) ◽  
pp. 4841-4858 ◽  
Author(s):  
Guowei Cai ◽  
Deyou Yang ◽  
Cheng Liu
Keyword(s):  
Time Delay ◽  
Smart Grids ◽  
Wide Area ◽  
Damping Control ◽  
Control Scheme ◽  
Signal Time
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