INCORPORATING SVC PLANNING TO RECONFIGURATION BASED ON VOLTAGE SECURITY MARGIN

The problem of optimum reconfiguration with FACTS devices planning in distribution systems is a task that must be solved in an optimal manner for distribution companies. Also, FACTS devices such as Static VAR Compensator also have been planned for loss reduction and voltage profile improvement in steady state conditions. This problem has been modeled as a nonlinear and multi objective optimization problem based on a multi-stage hieratical optimization problem to improve power system voltage stability margin and reduce losses. This reconfiguration algorithm starts with a radial topology by a theoretical approach based on the Graph concept and Matroid theory. The presented approach is useful to avoid tedious mesh checks for the topology constraint validation. Also, the voltage stability index is calculated to evaluate static voltage stability security margin. This calculation is done for each configuration pattern with defined SVCs planning. A toolbox has been developed to recognize loadability limit.