Control of Photovoltaic Plants Interconnected via VSC to Improve Power Oscillations in a Power System

This paper presents an integrated methodology applied to photovoltaic (PV) plants for improving the dynamic performance of electric power systems. The proposed is based on primary frequency control, which adds ancillary signal voltage reference DC-link source converter (VSC) in order reduce oscillations. computed by relating energy stored VSC and synchronous machine’s shaft. In addition, considers operating limits VSC, prioritizes active over reactive power. Furthermore, control assessed with interconnection damping assignment passivity-based (IDA-PBC), as well compared conventional PI control. IDA-PBC employed design a Lyapunov asymptotically stable controller using Hamiltonian structural properties open-loop model VSC. A 12-bus test system that PV compare classical proportional-integral approach. impact analyzed four scenarios different penetration levels (10%, 30%, 50%, 80%) large disturbances system. decrease inertia machines from 100 25% analyzed. time-domain simulation results show oscillations are reduced 16.8%, 38.43%, 37.53%, 76.94% comparison case where was not implemented. simulations were conducted SimPowerSystems toolbox MATLAB/Simulink software.