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.

scholarly journals T-shaped hybrid alternate arm converter with arm energy balancing control for battery energy storage systems

2021 ◽  
Vol 72 (6) ◽  
pp. 395-400
Author(s):  
Yoong Yang Leow ◽  
Chia Ai Ooi
Keyword(s):  
Energy Storage ◽  
Storage Systems ◽  
High Reliability ◽  
Lower Number ◽  
Energy Balancing ◽  
Energy Storage Systems ◽  
Battery Energy Storage ◽  
Battery Energy Storage Systems ◽  
Battery Energy ◽  
Balancing Control

Abstract Multilevel voltage source converters (VSCs), such as modular multilevel converter (MMC), cascaded H-Bridge (CHB) and alternate arm converter (AAC), are competent topologies for battery energy storage systems (BESSs) due to modularity, scalability and low harmonic distortion. However, there is a lack of studies about interfacing AAC with a BESS due to the arm energy balancing issue. Redundant sub-modules (SMs) are inserted passively into MMC, CHB and AAC to achieve high reliability; consequently, some of them are constantly idling, resulting in low SM utilization. We propose a novel topology -T-shaped hybrid alternate arm converter (TSHAAC) for BESS applications. In addition to the aforementioned features, the proposed TSHAAC requires lower number of SMs than MMC and AAC, along with lower number of switches than CHB. Moreover, an adapted arm energy balancing control is proposed to take advantage of the redundant SMs that are idling to achieve faster balancing than in conventional AAC configuration. The simulation results validate the integration of TSHAAC configuration in a BESS; the adapted arm energy balancing control is able to improve the balancing duration by 27 %.

A New Energy Management Control Method for Energy Storage Systems in Microgrids

2020 ◽  
Vol 35 (11) ◽  
pp. 11612-11624 ◽  
Author(s):  
Hadis Hajebrahimi ◽  
Sajjad Makhdoomi Kaviri ◽  
Suzan Eren ◽  
Alireza Bakhshai
Keyword(s):  
Energy Storage ◽  
Energy Management ◽  
Control Method ◽  
Storage Systems ◽  
Management Control ◽  
Energy Storage Systems ◽  
New Energy

scholarly journals Design and Implementation of a Control Method for GaN-Based Totem-Pole Boost-Type PFC Rectifier in Energy Storage Systems

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6297
Author(s):  
Nguyen-Nghia Do ◽  
Bing-Siang Huang ◽  
Nhat-Truong Phan ◽  
Tan-Tung Nguyen ◽  
Jian-Hong Wu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Factor ◽  
Control Method ◽  
Field Effect Transistors ◽  
Storage Systems ◽  
Harmonic Distortion ◽  
Wide Bandgap ◽  
Energy Storage Systems ◽  
Design And Implementation ◽  
Control Implementation

With the unceasing advancement of wide-bandgap (WBG) semiconductor technology, the minimal reverse-recovery charge Qrr and other more powerful natures of WBG transistors enable totem-pole bridgeless power factor correction to become a dominant solution for energy storage systems (ESS). This paper focuses on the design and implementation of a control structure for a totem-pole boost PFC with newfangled enhancement-mode gallium nitride field-effect transistors (eGaN FETs), not only to simplify the control implementation but also to achieve high power quality and efficiency. The converter is designed to convert a 90–264-VAC input to a 385-VDC output for a 2.6-kW output power. Lastly, to validate the methodology, an experimental prototype is characterized and fabricated. The uttermost efficiency at 230 VAC reaches 99.14%. The lowest total harmonic distortion in the current (ITHD) at high line condition (230 V) attains 1.52% while the power factor gains 0.9985.

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