Modeling and Control of Distributed Energy Systems during Transition Operation between Grid Connected and Standalone Modes
Nayeem Arafat · OhioLink ETD Center (Ohio Library and Information Network) · 2014
In the third technique, an alternative transition technique is proposed through hybridizing the current and droop controllers.The proposed hybrid transition control technique has higher reliability compared to the dispatch unit concept.During the GC mode, the proposed hybrid controller uses current control.During the SA mode, the hybrid controller uses droop control.During the transition mode, both of the controllers participate in formulating the inverter output voltage but with different weights or coefficients.Voltage source inverters interfacing the DGs as well as the proposed transition control algorithms have been modeled to analyze the stability of the algorithms in different configurations.The performances of the proposed algorithms are verified through simulation and experimental studies.It has been found that the proposed control techniques can provide smooth power flow to the local loads during the GC, SA and transition modes.v ACKNOWLEDGEMENTS My sincere gratitude to Dr. Yilmaz Sozer without whose ardent initiatives, constant compassionate advice and astute guidance this research work would not have materialized.Also I would like to