Gravitational search algorithm for coordinated design of PSS and TCSC as damping controller |
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Authors: | M Eslami H Shareef A Mohamed and M Khajehzadeh |
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Affiliation: | Department of Electrical, Electronic and Systems Engineering, University Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia |
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Abstract: | A newly developed heuristic global optimization algorithm, called gravitational search algorithm (GSA), was introduced and
applied for simultaneously coordinated designing of power system stabilizer (PSS) and thyristor controlled series capacitor
(TCSC) as a damping controller in the multi-machine power system. The coordinated design problem of PSS and TCSC controllers
over a wide range of loading conditions is formulated as a multi-objective optimization problem which is the aggregation of
two objectives related to damping ratio and damping factor. By minimizing the objective function with oscillation, the characteristics
between areas are contained and hence the interactions among the PSS and TCSC controller under transient conditions are modified.
For evaluation of effectiveness and robustness of proposed controllers, the performance was tested on a weakly connected power
system subjected to different disturbances, loading conditions and system parameter variations. The eigenvalues analysis and
nonlinear simulation results demonstrate the high performance of proposed controllers which is able to provide efficient damping
of low frequency oscillations. |
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Keywords: | gravitational search algorithm power system stabilizer thyristor controlled series capacitor tuning |
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