One-Cycle Control applied to a bidirectional Buck-Boost converter in energy storage applications

The distributed power storage and distributed power generation units are the basic units for storage and distribution in Microgrids. Some electrical topology of distributed storage units are characterized by the use of bidirectional converters that store energy in a battery bank at certain moments and supply this energy to Microgrid bus when necessary. The control of these bidirectional converters must consider the battery protection against voltage surges and transients, when the batteries are charging, so as the protection of the loads connected to the Microgrid bus, when the battery supplies the energy stored. The One-Cycle Control (OCC) technique has been used in the switching converters to allow fast response to transients, no overshoots and zero steady state error. The objective of this work is to use OCC technique in a bidirectional Buck-Boost converter to charge a battery bank when they are discharged, and to supply the battery energy to the loads when necessary, ensuring protection to the battery and to the loads.