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Future shipboard power system architectures are designed to service high-power pulsed loads through a combination of generators and energy storage for volume and weight considerations. Optimal control solutions therefore depend on both past and future events. This complicates evaluation of the relative performance of different architectures due to dependence on controller strategies and algorithms...
The transient response of power grids to external disturbances influences their stable operation. This paper studies the effect of topology in linear time-invariant dynamics of different power grids. For a variety of objective functions, a unified framework based on H2 norm is presented to analyze the robustness to ambient fluctuations. Such objectives include loss reduction, weighted consensus of...
The proposed improved bees algorithm (IBA) finds a trustworthy solution to the dynamic economic dispatch (DED) problem considering the prohibited operating zones. Additional techniques such as constraint handling, adaptive patch size, and limited search space are integrated with general bees algorithm, making significant improvement in the overall performance of the proposed technique. The DED problem...
Automatic generation control (AGC) regulates mechanical power generation in response to load changes through local measurements. Its main objective is to maintain system frequency and keep energy balanced within each control area so as to maintain the scheduled net interchanges between control areas. The scheduled interchanges as well as some other factors of AGC are determined at a slower time scale...
With regard to the interval low-frequency oscillation problems in large-scale interconnected power system, a design method based on Fruit Optimization Algorithm (FOA) for the wide-area time-delay damping controller is proposed in this paper. Systems such as the New England 10-generator 39-bus system is employed to validate the effectiveness of the method presented. The system is linearized at first,...
In order to enrich the acquisition means for the coherence index in the dynamic characteristics of inter-area oscillation(IAO), this paper proposed an integrated algorithm for tracking coherence of electromechanical oscillation using Masking Signal based Empirical Mode Decomposition (MS-EMD) and Correlation Analysis(CA). The case study has been carried out on a simplified system of Southeastern Australian...
This paper uses the artificial bee colony (ABC) algorithm for solving the optimal dynamic dispatch (ODD) problems in power system. Many nonlinear characteristics of the generator, such as valve-point effects and the transmission network loss are considered. To show its feasibility and effectiveness, two different systems are demonstrated and compared to other approaches solving the same problem. Moreover,...
Power system operators use dynamic models of the power grid to determine if the transient responses of transmission devices are within tolerable limits. The focus of this work is on the parameter estimation of a complex load model by using measurements from digital fault recorders or phasor measurement units, and the goal is to create a method which will produce more accurate models. Two methods are...
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 presents a new coherency identification method for dynamic reduction of power system so that the changes in dynamic response of reduced equivalent system would be minimized. It is based on PAM algorithm and used to identify optimal coherent group of each generators using coherency. The coherency between generators is evaluated from nonlinear simulation time response and it is proposed as...
This paper provides an algorithm based on the microhabitat theory and particle swarm for the problem of wide area controller parameters optimization. The method cans optimal parameters. According to multi-objects model of the problem, and reduce the difficulties and works in design for multi-machine power system damping controller. In the end of paper, a typical four-generator two-area testing system...
This paper provides an algorithm based on the microhabitat theory and particle swarm for the problem of Wide area controller parameters optimization. The method cans optimal parameters. According to multi-objective model of the problem, and reduce the difficulties and works in design for multi-machine Power System damping Controller. In the end of paper, a typical four-generator two-area testing system...
Outage time after extensive blackouts depends very much on the power system restoration process. Power system restoration is a very challenging task to the operator since the situation is so far from normal conditions. This paper proposes a simulation-based tool that determines a feasible sequence of operator actions that restores power system operation. The effect of each candidate switching operation...
A vectorial implementation of dynamic optimal power flow (DOPF) including wind farms was presented. The vectorization of DOPF was established by arranging the control variables and state variables according to the variable types and time intervals. The asynchronous generators in wind farms were modeled in Q-V formulation. A step-controlled primal-dual interior point framework (SCIPM) with upper and...
Power system defensive islanding is an efficient way to avoid catastrophic wide area blackouts, such as the 2003 North American blackout. Finding defensive islands of large scale power systems is a combinatorial explosion problem. Thus, it is very difficult to find an optimal solution, if it exists, within reasonable time using analytical methods. This paper proposes utilizing the computational efficiency...
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