Enabling maximum penetration of distributed generations withoutviolating protection system coordination

Driven by economic, technical and environmental reasons, the energy sector is moving into an era
where Distributed Generation (DG) will meet a large segment of increasing electrical energy demand.
Local distribution companies are required to accept a given percentage of customer-owned renewable
DG units in their system. Generally, DG introduces new possibilities such as shaving of peak loads
and reliability enhancement. On the other hand, DG causes a number of protection problems in the
distribution networks, such as loss of coordination, de-sensitization, nuisance fuse blowing, relay
bidirectional operation, and overvoltage. In this work, general guidelines about maximum allowable
DG penetration that will not ignite these adverse effects will be identified for typical feeders in Ontario.
Moreover, a recommendation about suitable connection of the interfacing transformer to avoid
overvoltage during ground faults will be given. Furthermore, general recommendations will be given at
the end of this internship about possible methods that can be used to overcome any protection
coordination problem if it…..TOBECONT’D

Faculty Supervisor:

Magdy Salama

Student:

Partner:

Hydro One

Discipline:

Engineering

Sector:

Energy and Utilities

University:

University of Waterloo

Program: