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This paper presents the control strategies and output (virtual) impedance design approach for parallel operated distributed generation (DG) units in a low voltage (LV) microgrid system. To achieve communicationless control among DG interfacing converters, virtual impedances are placed between the interfacing converter outputs and the grid to improve system stability and mitigate coupling between real...
In this paper, a design of the control system for parallel distributed sources is proposed. These sources are connected together using inverters in an isolated low voltage microgrid. The inverters have been used to connect distributed power sources to microgrid with the capability of modification of the voltage amplitude and frequency. Also for the first time in IEEE publications, an automatic frequency...
This paper presents a novel control strategy to operate a low-voltage (LV) micro-grid in grid connected operation mode as well as autonomous operation mode. Depending on the inverter output impedance which is mainly resistive due to the LV cables a proper control strategy based on an unbalanced resistive droop approach is developed. The control strategy is verified by simulating fast changes of power...
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