Abstract
The idea of meeting increased power demand at a load centre by a distributed generation (DG) source employing locally available energy resources has attracted much attention in power system research. The growth and development of DG is driven by environmental, regulatory and commercial factors. Although DG technology offers many technical benefits, there are certain issues that need to be addressed. The impact of DG penetration on power system stability is one such issue that requires further investigation. The main objective of this article is to analyze the impact of the rotational type of DGs on small-signal and transient stability of power system. The results of critical damping ratio and timedomain indicators are analyzed and discussed. The results indicate that increasing the DG penetration level beyond an optimum value can degrade the stability of the system.
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