Adaptive Approach for Power Oscillation Damping Controller using STATCOM

This method deals with the design of an adaptive power oscillation damping (POD) controller used for a static synchronous compensator (STATCOM) which is equipped with energy storage. The adaptive techniques like fuzzy logic controller, PID controller, algorithm, etc., can be used to achieve it which allows a fast, selective, and adaptive estimation of the low-frequency electromechanical oscillations from locally measured signals during power system disturbances. The method employed here is based on variable DC voltage control and constant modulation index based method. This method is effective because it increases the damping of the system not only at the frequencies of interest but also in the case of system parameter uncertainties and at various connection points of the compensator. To make the most effective use of active and reactive power injection at various connection points of the STATCOM, a control strategy will be derived using the simplified model in MATLAB simulink using simpower system toolbox. For implementing it, a small-signal analysis of the dynamic performance of the proposed control strategy will be carried out. The simulation and experimental results are used to verify the effectivity of the proposed control method to provide power oscillation damping despite of the connection point of the device and in the presence of system parameter uncertainties.