W. Du

Power system small-signal oscillation stability as affected by large-scale PV penetration

This paper investigates the impact of a large photovoltaic (PV) penetration on power system small signal oscillation stability. A comprehensive model of a single-machine infinite-bus power system integrated with a PV power generation power plant is established. Numerical computation of damping torque contribution from the PV power plant is carried out, which is confirmed by the results of calculation of system oscillation model and non-linear simulation. Those results indicate that power system oscillation stability can be affected either positively or negatively. There exists an operational limit of the PV power plant as far as system oscillation stability is concerned. Beyond the operational limit, the PV generation supplies negative damping torque, thus damaging system oscillation stability. Hence for the safe penetration of PV generation into power systems, the operational limit of oscillation stability of the PV power plant must be considered.

Effect of grid-connected fc generation on power system oscillation damping

This paper investigates power system small-signal oscillation stability as affected by a grid-connected SOFC (solid oxide fuel cell) power plant. It is demonstrated in the paper how the conventional and effective damping torque analysis can be applied to study the effect of the grid-connected FC (fuel cell) power generation on the damping of power system oscillations. It is concluded in the paper that the FC power generation can affect power system oscillation stability either positively or negatively, dependant of system load conditions. This conclusion is confirmed by the results of computation and non-linear simulation of an example power system integrated with a SOFC power plant.