Dynamic Stability Enhancing Control Strategy for
Power Oscillation Damping in Power systems with
High-Level PV Penetration
Journal:
GRENZE International Journal of Engineering and Technology
Authors:
Muwaffaq Usman, Rosanna Thomas
Volume:
3
Issue:
2Special Issue
Grenze ID:
01.GIJET.3.2Special Issue
Pages:
181-190
Abstract
The deregulated power system has paved the way for a significant number of
distributed energy resources (DER). This results in a large installation of renewable sources
in the grid. Thus large installations of PV systems are becoming more common. These
Centralized PV systems can cause major issues in the existing grid if these are not
adequately addressed. The significant contribution of these systems can cause problems
with the dynamic stability of the power system. The intermittent and inertia-less nature of
PV systems can produce significant power oscillations. At the present condition, the
penetration level of PV into the grid is limited by the utilities, to prevent problems of power
oscillation. Thus the PV plant capacity cannot be increased beyond the penetration limit.
The penetration limit depends on several factors such as the types of loads and stability
enhancement devices on the grid. The penetration limit is regulated cyclically. This paper
proposes a control strategy for power oscillation damping in power systems implemented in
Grid connected converters (GCC) so that the power system stability is enhanced without
any additional cost of equipment. This, in turn, helps to provide a penetration margin and
thereby to increase the PV capacity of the grid.