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A methodology based on Recurrence Quantification Analysis (RQA) for the clustering of generator dynamic behavior is presented. RQA is a nonlinear data analysis method, which is used in this paper to extract features from measured generator rotor angle responses that can be used to cluster generators in groups with similar oscillatory behavior. The possibility of extracting features relevant to damping...
This paper attempts to show how a fuzzy logic controller (FLC) is used for the design of a power system stabilizer (PSS) for a multi-machine interconnected power system. It has also been addressed how a fuzzy logic-PSS has been optimized by using an adaptive neuro-fuzzy inference system (ANFIS) based technique. The design objective of the PSS is to supply an external damping torque to an automatic...
This paper proposes a method for assessing the damping torque contribution of generators equipped with power system stabilizers (PSSs) using synchrophasor measurements from disturbance events exhibiting lightly damping oscillations. The method is based on an extension to the Heffron-Phillips and deMello-Concordia synchronizing and damping torque analysis method to include the sensitivities for the...
The increase in the demand for electric energy, the technological developments, and the environmental problems have led to a strong trend for the use of distributed generation (DG) in power systems. This kind of generation presents many advantages over the conventional centralized generation (as for example, low environmental impact and reduction of the transmission losses). However, the distributed...
This work investigates the impact of increased penetration of doubly fed induction generators (DFIGs) on electromechanical modes of oscillations of a large interconnected power system. The work proposes a control mechanism aimed at designing the power system stabilizer (PSS) for a DFIG similar to the PSS of synchronous machines. The wind generator power output is taken as input to the PSS. The active...
This paper deals with designing of Power System Stabilizer (PSS) based on Imperialist Competitive Algorithm (ICA) to improve the stability of power system. The proposed algorithm has been applied on a Single Machine Infinite Bus (SMIB) system where the coefficients of PSS controller has been optimized by ICA. The system with proposed controller has been simulated for the special disturbance in input...
This paper proposes a new control design scheme for doubly fed induction generator (DFIG) based wind generation systems to damp interarea oscillations of power systems. The control system of DFIG consists of two parts. The first part is the primary power and voltage (PV) control. The second part is a supplementary damping controller (SDC) based on PV control, designed to enhance damping of interarea...
This paper presents the application of fuzzy logic based supplementary controller, for Interline Power Flow Controller (IPFC), to enhance the damping of low frequency oscillations in the Single Machine-Infinite Bus (SMIB) power system installed with IPFC. The fuzzy logic based IPFC controller using Mamdani type inference system is designed with generator speed and rotor angle as its input signals...
This paper addresses the problem of electromechanical wave propagation in power systems. To mitigate this type of disturbance, this paper proposes a remote control strategy that could be applied to power system stabilizers. This strategy is based on wide-area measurements, and exploits the disturbance propagation speed to introduce an extra damping torque simultaneously with the disturbance arrival...
The rotor angle stability of generator is basic to hydro turbine generating sets (HTGS) and power systems stabilization. Firstly, an approximate design method is proposed to solve the difficulty in application for Hamiltonian damping injection method. Secondly, the Hamiltonian model of HTGS is built by connecting Hamiltonian model of nonlinear hydro turbine and generator. Adding the relative factors...
In this paper, conventional lead-lag power system stabilizer (CPSS) is designed to damp electromechanical oscillations. CPSS parameters settings are computed using linear control theory. A new technique based on particle swarm optimization PSO is proposed to optimize the parameters settings of CPSS. The problem is formulated as an optimization problem, the objective is to compute the optimal parameters...
In this paper a simplified analysis of the effect of a Thyristeor Controlled Phase Shifter (TCPS) on the stability of a Single machine infinite bus (SMIB) system is presented. The TCPS which is located at the terminal of generator has the PID controller in which the coefficients of PID is optimized by chaos and PSO algorithms in order to damp the Low Frequency Oscillations (LFO). From the first, for...
Load characteristics are known to have an effect on the performance of a Power system stabilizer (PSS) while damping inter-area oscillation. In this paper, conventional and wide area control system (WACS) based PSS designs are comparatively assessed. The conventional PSS utilizes local rotor speed as its input whereas the WACS-based PSS can use both local and remote generator rotor speeds. From existing...
Analysis of the fundamental modes of oscillation plays a crucial role in assessment of the power system dynamic performance and control design to suppress undesirable modes. Multivariable state space representation overcomes some of the hidden dynamics related difficulties. Only a small part of the system pole spectrum is controllable-observable. Modal approximations of the transfer function matrix...
As wind turbines continue to grow in size and flexibility and are deployed in more hostile environments, the need to develop advanced control schemes will be essential to deliver the lowest possible energy costs. A sophisticated control strategy is presented to compensate for the complicated effects of a stochastic operating environment and nonlinearities inherent in wind turbine generator (WTG) dynamics...
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