Abstract
For physically understanding the dynamic response of a photovoltaic (PV)-based integrated power system for electromechanical oscillation damping, firstly, this paper develops the linear mathematical model of a single machine infinite bus system integrated with PV in the electromechanical time scale. Then, based on the electric torque analysis method and the functional route of active power control (P-control) and reactive power control (Q-control), the key factors and influence laws of the power system inertial effect, damping level and synchronization capability are analyzed. The results show that when the PV operating mode utilizes the rotor speed as feedback signal, the PID controller parameters of P or Q-control loop can affect the damping level, synchronization capability and inertial effect of the power system, respectively. The accuracy of the physical mechanism analysis is verified by MATLAB.
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