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DC-Bus Signaling: A Distributed Control Strategy for a Hybrid Renewable Nanogrid

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3 Author(s)
Schonberger, J. ; Dept. of Electr. & Comput. Eng., Canterbury Univ., Christchurch ; Duke, R. ; Round, S.D.

A dc nanogrid is a hybrid renewable system since renewable sources supply the average load demand, while storage and nonrenewable generation maintain the power balance in the presence of the stochastic renewable sources. The system is power electronic based, with converters being used to interface both the sources and loads to the system. The nanogrid is controlled using dc-bus signaling (DBS), a distributed control strategy in which the control nodes, the source/storage interface converters, induce voltage-level changes to communicate with the other control nodes. This paper explains the control structure required for the converters to permit the use of DBS, and explains a procedure for implementing a system-wide control law through independent control of the source/storage interface converters. Experimental results are presented to demonstrate the operation of this novel control strategy

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Industrial Electronics, IEEE Transactions on  (Volume:53 ,  Issue: 5 )