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Due to the influence of technology and management mechanism, it is difficult to implement the Automatic Generation Control (AGC) in multi-area power system. Distributed Artificial Intelligence (DAI) presents a novel idea for coordination optimization control of multi-area AGC. In this paper, quick response characteristic of Superconducting Magnetic Energy Storage (SMES) and coordination skill of Multi-Agent...
In this paper, the Hopf bifurcation is studied that present at dynamic power system. Some conditions that guarantee Hopf bifurcation exist in dynamic power system are given. A new method is structured to detect the Hopf bifurcation, which is able to detect direction of dynamic change of the real parts of the eigenvalues as the parameter change. The eigenvalues that cross firstly the imaginary axis...
This paper describes the effect of electrical parameters of the double fed induction generator on the transient voltage stability of a DFIG to a simple grid; the DFIG model has been developed in the Matlab/simulink tool. The dynamic behavior of a wind turbine connected to a grid is examined. A three-phase fault is applied close to the wind turbine. The effect of different electrical parameters of...
The unified dynamical model of DC-DC buck converter is set up, and then two sliding mode controllers are introduced called conventional sliding mode controller and sliding mode proportional integral derivative (PID) controller. The stability are analyzed for the DC-DC converter system controlled by the sliding mode PID, and the optimum sliding mode PID parameters are determined. Finally, the system...
Small signal stability analysis is conducted considering grid connected doubly-fed induction generator (DFIG) type. The modeling of a grid connected DFIG system is first set up and the whole model is formulated by a set of differential algebraic equations (DAE). Then, the mathematical model of rotor-side converter is built with decoupled P-Q control techniques to implement stator active and reactive...
In this paper, the time-delayed feedback control method is introduced to stabilize unstable equilibrium points undergoing Hopf bifurcation for an induction motor (IM) drive system. Stability criterion of a nonlinear time-delayed system is first established, and then an effective procedure is shown how to stabilize the unstable equilibrium points by suitably select the feedback gain k and the time-delay...
In this paper, a method is presented and achieved to accurately determine Hopf bifurcation point for an induction motor (IM) drive system, and Hopf bifurcation diagram is showed to indicate evolvement of the equilibrium points from steady state to undergoing Hopf bifurcation and then achieving stabilization again. At last, the classical Floquet theory is applied to confirm the limit cyclepsilas stability.
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