Abstract: - This paper models the impact of distributed generation to distribution system reliability using a
comprehensive, sequential Monte Carlo simulation model. Since utility-connected distributed generation is
typically installed close to the consumers, it can reduce the current at the main feeder. Consequently, it
increases the chance that a stressed feeder can be reconfigured under a fault at a neighboring feeder. As a
comparison, it may be impossible to reconfigure feeder connection because reconfiguration will lead to line
overflow without distributed generators to supply part of the load. Test results from a system modified from
the IEEE 34-bus system are presented. It is shown that installation of distributed generators can improve the
distribution system reliability considerably.