scholarly journals Determination of Duty Cycle for Energy Storage Systems in a PV Smoothing Application

2016 ◽  
Author(s):  
David A. Schoenwald ◽  
James Ellison
Keyword(s):  
Energy Storage ◽  
Duty Cycle ◽  
Storage Systems ◽  
Energy Storage Systems

scholarly journals Bidirectional Operation Scheme of Grid-Tied Zeta Inverter for Energy Storage Systems

Electronics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 1159
Author(s):  
Woo-Young Choi
Keyword(s):  
Energy Storage ◽  
Duty Cycle ◽  
High Efficiency ◽  
Control Method ◽  
Storage Systems ◽  
High Reliability ◽  
Current Control ◽  
Energy Storage Systems ◽  
Grid Current ◽  
Operation Modes

The zeta inverter has been used for single-phase grid-tied applications. For its use of energy storage systems, this paper proposes the bidirectional operation scheme of the grid-tied zeta inverter. A shoot-through switching state is introduced, providing reliable bidirectional operation modes. A shoot-through duty cycle is utilized for the bidirectional grid current control of the inverter. The grid current is bidirectionally controlled by the shoot-through duty cycle, which enables the inverter to operate with seamless change of operation modes. Over the state-of-the art techniques using flyback and Cuk inverter topologies, the grid-tied zeta inverter using the proposed operation scheme provides advantages of high efficiency, low cost, and high reliability. The operation principle is presented by describing the operation mode and control method for the grid-tied zeta inverter. A 500 W prototype has been built and tested to verify its operation principle.

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