A modular multilevel converter based battery-ultracapacitor hybrid energy storage system for photovoltaic applications

Author

Feng Guo ; Yanzhu Ye ; Sharma, Ratnesh

Author_Institution

Energy Manage. Dept., NEC Labs. America, Inc., Cupertino, CA, USA

fYear

2015

fDate

10-13 March 2015

Firstpage

1

Lastpage

6

Abstract

To smooth the output power of a Photovoltaic (PV) system, the integration of the Hybrid Energy Storage System (HESS) has been considered as an effective solution. In this paper, a Modular Multilevel Converter (MMC) is proposed for the HESS that combines battery and UltraCapacitor (UC), and a two-layer framework is proposed to control the proposed HESS system. Compared to traditional HESSs and other MMCs for HESS applications, the proposed MMC based HESS increases the overall system efficiency, reduces the cost of dc side passive components, and is favorable for grid energy storage systems. Simulation results are provided to verify the theoretical analysis.

Keywords

photovoltaic power systems; power convertors; power grids; secondary cells; supercapacitors; HESS; MMC; battery-ultracapacitor; dc side passive components; grid energy storage systems; hybrid energy storage system; modular multilevel converter; photovoltaic system; two-layer framework; Batteries; Fuzzy logic; Inductors; Niobium; Power generation; System-on-chip; Battery; Hybrid Energy Storage System; Modular Multilevel Converter; Photovoltaics; UltraCapacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Systems Conference (PSC), 2015 Clemson University

Conference_Location

Clemson, SC

Type

conf

DOI

10.1109/PSC.2015.7101674

Filename

7101674