Maintaining a sustainable and reliable source of energy to supply critical loads within a renewable energy based microgrid (MG) during blackouts is directly related to its bus voltage variations. For example, voltage variation might trigger protection devices and disconnect DERs within the MG. Centrally controlled MGs (CCMGs) type is dependent on communication. Therefore, it is very important to analyze the impact of communication networks performance degradation, such as latency, on the bus voltage of CCMGs. This paper investigates the effect of wireless communication technologies latency on the bus voltage and performance of centralized DC MGs. Two mathematical models were developed to describe the behavior of microgrids during latency. As a case study, a renewable energy- based DC microgrid with its centralized control scheme was simulated to validate and compare the developed mathematical models. Results verify the accuracy of the developed models and show that the impact may be severe depending on the design, and the operational condition of the MG before latency occurs.
M. Saleh, Y. Esa, and A. Moahmed, “Impact of Communication Latency on the Bus Voltage of Centrally Controlled DC Microgrid during Islanding,” IEEE Transactions on Sustainable Energy.
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