D.Devaraj

Publications

2 Fuzzy Logic Control of Static Var Compensator for Power System Damping

Authors: N.Karpagam, D.Devaraj

Abstract:

Static Var Compensator (SVC) is a shunt type FACTS device which is used in power system primarily for the purpose of voltage and reactive power control. In this paper, a fuzzy logic based supplementary controller for Static Var Compensator (SVC) is developed which is used for damping the rotor angle oscillations and to improve the transient stability of the power system. Generator speed and the electrical power are chosen as input signals for the Fuzzy Logic Controller (FLC). The effectiveness and feasibility of the proposed control is demonstrated with Single Machine Infinite Bus (SMIB) system and multimachine system (WSCC System) which show improvement over the use of a fixed parameter controller.

Keywords: Transient Stability, FLC, SVC, SMIB, PIDcontroller

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1 Enhanced Genetic Algorithm Approach for Security Constrained Optimal Power Flow Including FACTS Devices

Authors: D.Devaraj, R.Narmatha Banu

Abstract:

This paper presents a genetic algorithm based approach for solving security constrained optimal power flow problem (SCOPF) including FACTS devices. The optimal location of FACTS devices are identified using an index called overload index and the optimal values are obtained using an enhanced genetic algorithm. The optimal allocation by the proposed method optimizes the investment, taking into account its effects on security in terms of the alleviation of line overloads. The proposed approach has been tested on IEEE-30 bus system to show the effectiveness of the proposed algorithm for solving the SCOPF problem.

Keywords: Genetic Algorithm, thyristor controlled series capacitor (TCSC), optimal power flow, FlexibleAC transmission system (FACTS) devices, Severity Index (SI), Security Enhancement

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