Title :
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
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;
Conference_Titel :
Power Systems Conference (PSC), 2015 Clemson University
Conference_Location :
Clemson, SC
DOI :
10.1109/PSC.2015.7101674
