IEEE Standard 1547 [1] was an attempt at a National Standard
for DG interconnection. In this author’s view, IEEE 1547 provides
very limited guidance to the industry on interconnect protection
requirements other than calling for over/underfrequency and
over/undervoltage interconnection protection. However, IEEE
1547.2[2] provides more comprehensive interconnection guidance.
Both standards clearly defines interconnection protection be
iIII. BASIC TYPES OF DG GENERATORS
This paper discusses three basic types of DG generators. Two
types―induction generators and synchronous generators are
traditional types of distributed generators, which operate
interconnected with the utility system. The third type is inverterbased
DGs that do not operate in synchronism with the utility
system.