Paolo Piagi

Autonomous control of microgrids

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 hi parallel to the grid or can operate in island, providing UPS services. The system will disconnect from the utility during large events (i.e. faults, 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. Laboratory verification of the Consortium for Electric Reliability Technology Solutions (CERTS) microgrid control concepts are included

Providing premium power through distributed resources

The modern industrial facility depends on sensitive electronic equipment that can be shut down suddenly by severe power system disturbances. A large number of these disturbances on the power system are a result of line faults which can cause momentary voltage sags. This results in equipment malfunctioning and high restart cost. This papers describes the control of distributed resources as a solution to such problems. In particular the focus is on systems of distributed resources that can switch from grid connection to island operation without causing problems for critical loads.

Extended Microgrid Using (DER) Distributed Energy Resources

The electric power industry is in the midst of a critical period in its evolution. The re-regulation of the industry has resulted in the creation of self-locating merchant generation and wholesale electric power markets that are using the transmission system in ways for which it was not designed. This had resulted in a system operation closer to its edge. The retail customers have increasingly sophisticated energy service requirements that require much higher power quality than in the past. On way to approach these issues is to focus on robustness at the networked transmission and generation system while providing reliability locally. The distribution system should focus on providing the customer with the required level of power quality. Distributed energy resource (DER) is a way to enhance the distribution systems level of power quality.