Comparative Study of PSS and POD for A Power System With PV Plant

An increase in interconnection of power systems may lead to poor damping oscillation. This paper studies the oscillation damping performance of the Power System Stabilizer (PSS) and Power Oscillation Damper which are located on a photovoltaic plant (PV-POD). A computer simulation of a power system with PSS and PV-POD is conducted in Matlab/Simscape Power System. The study consists of five scenarios with different operating conditions. To compare the damping performance, the results from the Eigen analysis and time domain analysis from the computer simulation are used to analyze the damping quality. The results show that the oscillation damping obtained from the system with POD is better than that from the system with PSS. However, when the operating condition of the system is changed, the oscillation damping of the system with PSS is more consistent than that of the system with POD.