Date of Award


Document Type


Degree Name

Master of Engineering


Electrical & Electronic Engineering

First Advisor

Dr. Sreto Boljevic


Presence of Distributed Generation (DG) in Industrial Site Distribution Network (ISDN) can represent a significant impact on the operational characteristics of the network. Present planning and operation criteria use for ISDN are in general not suitable to cope with the presence of a significant DG capacity. The presence of DG provides considerable benefits from both engineering and economic viewpoints. However, it changes radial configurations of the distribution feeders. Consequently it may cause coordination failure to existing protection system which is originally set based on radial configuration. In addition, high penetration of DG into ISDN may increase feeder loss, and cause system voltage profile out of a required range.

Distributed Generation may have a significant impact on the system and equipment operation in terms of steady state operation, dynamic operation, reliability, power quality, stability and safety for both ISDN user and electricity suppliers. The idea behind the connection of DG is to increase the reliability of power supplied to the customers, make use of a locally available resource and, if possible, reduce losses in transmission and distribution systems. The specific benefits depends on the local conditions and installation owner’s interest. The reasons for installing DG at ISDN include:

i) Combined Heat and Power Plant (CHP) – High Efficiency

ii) Standby/emergency generation-enhanced reliability

The effect of the DG units on these quantities strongly depends on the type of DG units and the type of ISDN. DG units can be either directly connected to the ISDN, such as synchronous or asynchronous generators, or via a power electronics converter. In all these cases, the power flow in the ISDN as well as the network losses and the voltage control are affected. The introduction of DG alters the characteristics of the network. The number of technical constraints and factors are impacted by the amount of DG that is connected.