ObjectStab is a general purpose simulation tool for power system stability studies developed by Modelica which is an object-oriented modeling language. It provides enough modelingflexibility to allow addition or modification of new
power system components. This paperdescribes an incorporated use of fuzzy logictoolbox in Matlab/ Simulink and Object- Stablibrary to enhance the application of this libraryinto fuzzy control design environment. The example provided here is the modeling of the static synchronous series compensator (SSSC) which is the new device developed in the Object Stab. In addition, the interface of ObjectStab with Matlab / Simulink for an SSSC damping controller design by fuzzy logic toolbox is explained step by step. Simulation
studies in a multi-machine power systemconfirm the effectiveness of the designed fuzzy
controller.