DC-link fluctuation compensation method for PV generation system combined energy storage

Author

Bong-Yeon Choi ; Jung-Min Park ; Jun-Hyeok Jegal ; Soon-Ryung Lee ; Chung-Yuen Won

Author_Institution

Coll. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

fYear

2015

fDate

1-5 June 2015

Firstpage

2881

Lastpage

2886

Abstract

A DC-link voltage compensation method for a photovoltaic (PV) generation system with energy storage system(ESS) is presented. When PV power is oscillated, the DC-link voltage is also influenced. And this fluctuation of DC-link critically affects the load voltage when the ESS is operated in stand alone mode. In conventional method, huge capacitor bank is necessary to reduce the fluctuation. In this case, if the PV power is drastically changed, large capacitance as much as the whole PV system is required to reduce the DC-link fluctuation. Therefore, the DC-link voltage compensation method is applied to the DC-link control to reduce the DC-link voltage variation without using huge capacitor bank. The proposed control method is mathematically analyzed and verified by simulation results.

Keywords

current fluctuations; energy storage; photovoltaic power systems; power system control; DC-link control; DC-link fluctuation compensation method; DC-link voltage compensation method; ESS; PV generation system; combined energy storage; energy storage system; huge capacitor bank; load voltage; photovoltaic generation system; Batteries; Fluctuations; Inverters; Simulation; Voltage control; Voltage fluctuations; DC-link fluctuation; ESS; PV generation; energy storage system; power supply quality;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015 9th International Conference on

Conference_Location

Seoul

Type

conf

DOI

10.1109/ICPE.2015.7168183

Filename

7168183