AGC study of a hydrothermal system with SMES and TCPS

Frequency deviations and inter-area tic-power fluctuations from their respective scheduled values following a local load disturbance are a source of;real concern in interconnected power system operation and control. In this paper, a new method is proposed to minimise such deviations and hereby enhance the performance of Automatic Generation Control (AGC) of an interconnected hydrothermal power system with the coordinated)operation of a Superconducting Magnetic Energy Storage (SMES) unit in thermal area and a Thyristor Controlled Phase Shifter (TCPS) in series with the tie-line. Generation Rate Constraints (GRCs) are also considered for the thermal and hydro systems. The integral controller gain settings are obtained by optimising a quadratic performance index using the Integral Squared Error technique. Comparison of the dynamic responses demonstrates the effectiveness and efficiency of the suggested SMES-TCPS combination in suppressing and stabilising the oscillations of frequency and tie-power deviations as well as in reducing the settling time. Copyright (C) 2008 John Wiley & Sons, Ltd.