Dynamic Response of Distributed Generators in a Hybrid Microgrid
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A microgrid may be supplied from inertial (rotating type) and non-inertial (converter-interfaced) distributed generators (DGs). However the dynamic response of these two types of DGs is different. Inertial DGs have a slower response due to their governor characteristics while non-inertial DGs have the ability to respond very quickly. The focus of this paper is to propose better controls using droop characteristics to improve the dynamic interaction between different DG types in an autonomous microgrid. The transient behavior of DGs in the micro-grid is investigated during the DG synchronization and load changes. Power sharing strategies based on frequency and voltage droop are considered for DGs. Droop control strategies are proposed for DGs to improve the smooth synchronization and dynamic power sharing minimizing transient oscillations in the microgrid. Simulation studies are carried out on PSCAD for validation.
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Dewadasa, M.; Ghosh, Arindam; Ledwich, G. (2011)A microgrid may be supplied from inertial (rotating type) and non-inertial (converter-interfaced) distributed generators (DGs). However the dynamic response of these two types of DGs is different. Inertial DGs have a ...
Shahnia, Farhad; Majumder, R.; Ghosh, Arindam; Ledwich, G.; zare, F. (2010)This paper shows how the power quality can be improved in a microgrid that is supplying a nonlinearand unbalanced load. The microgrid contains a hybrid combination of inertial and converter interfaceddistributed generation ...
Majumder, R.; Ghosh, Arindam; Ledwich, G.; zare, F. (2008)This paper describes control methods for proper load sharing between parallel converters connected to microgrid in a distributed generation system. The system stability is investigated during load sharing for safe operation ...