| Abstract | This study presents an adaptive differential evolution (DE) algorithm to allocate the thyristor-controlled series
compensator (TCSC) incorporated with the reactive power management problem. In addition, a dynamic updating is
applied for scaling and penalty factors to enhance the performance of the multi-objective DE algorithm. During the
selection of the best candidate lines for efficient allocation of TCSC devices, three situations are considered for
transmission lines that are excluded from the candidate ones. These situations are the lines connected between two
generating units; lines connected through transformers and the lines of low losses. The multi-objective function, which
is considered in this study, compromises between reducing power losses, improving voltage profile, reducing reactive
power losses, reducing TCSC cost and reducing number of flexible alternating current transmission systems units. The
optimal siting and sizing of TCSC is defined for normal and emergency operating conditions. The proposed procedure
is employed for IEEE 9-bus and IEEE 30-bus test systems in addition to western delta network as a real part of the
Egyptian network. Four studied cases are considered for each test system to represent normal and abnormal operating
conditions. Results clearly indicate the effectiveness of the adaptive DE algorithm to allocate perfectly the TCSC to
enhance the system performance. |