Microgrids and Distributed Generation

TLDR

Distributed generators can both solve and cause problems, operating in parallel or island mode to provide utility services. The study proposes a system approach that treats generation and loads as a microgrid to better realize distributed generation potential. The microgrid system disconnects from the utility during faults or voltage collapses and can intentionally island when grid power quality falls below set standards. Using waste heat from the sources raises overall efficiency and improves the project's financial viability. University of Wisconsin laboratory verification of microgrid control concepts is included.

Abstract

Application of individual distributed generators can cause as many problems as it may solve. A better way to realize the emerging potential of distributed generation is to take a system approach which views generation and associated loads as a subsystem or a "microgrid." The sources can operate in parallel to the grid or can operate in island, providing utility power station services. The system will disconnect from the utility during large events (e.g., faults and voltage collapses), but may also intentionally disconnect when the quality of power from the grid falls below certain standards. Utilization of waste heat from the sources will increase total efficiency, making the project more financially attractive. University of Wisconsin laboratory verification of microgrid control concepts are included.