Load Frequency Control of Security Constrained Deregulated Power System Using Crow Search Algorithm

In this paper, load frequency control (LFC) of nonlinear multi-area interconnected deregulated power system (DPS) is presented. To obtain realistic design, the DPS is modelled with reheat, non-reheat and hydro generators considering nonlinear security constraints - generation rate constraint (GRC), governor dead band (GDB), time delay (TD) and different system parameter values. A unique objective function is formulated by taking into account of the right combination of transient and steady state performance specifications with appropriate weighting coefficients. In this work, recently developed crow search algorithm (CSA) is used to obtain the optimal PID control gains for optimal steady state and transient performances. The performance of the proposed CSA based control system is compared with real codded GA (RGA) and enhanced PSO (EPSO) based control strategy. The proposed methodology gives best results in all cases.

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