Modeling and control of a three-port DC-DC converter for PV-battery systems

Author

Jianwu Zeng ; Wei Qiao ; Liyan Qu

Author_Institution

Dept. of ECE, Power & Energy Syst. Lab., Univ. of Nebraska-Lincoln, Lincoln, NE, USA

fYear

2015

fDate

15-19 March 2015

Firstpage

1768

Lastpage

1773

Abstract

This paper presents modeling and decoupled control design for an isolated three-port DC-DC converter (TPC), which interfaces a photovoltaic (PV) panel, a rechargeable battery, and an isolated load. A small signal model is derived from the state-space equations of the TPC. Based on the model, two decoupled controllers are designed to control the power flows of the two sources and the load voltage independently. Experimental studies are performed to verify that the two controllers are capable of regulating the power flows of the PV panel and the battery while maintaining a constant output voltage for the TPC.

Keywords

DC-DC power convertors; battery storage plants; control system synthesis; electric current control; load flow control; photovoltaic power systems; power generation control; secondary cells; PV-battery system; TPC; decoupled control design; isolated three-port DC-DC converter; photovoltaic panel; power flow control; power flow regulation; rechargeable battery; small signal model; state-space equation; Batteries; DC-DC power converters; Load flow; Load modeling; Mathematical model; Renewable energy sources; Voltage control; Battery; decoupling control; photovoltaic (PV); three-port DC-DC converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE

Conference_Location

Charlotte, NC

Type

conf

DOI

10.1109/APEC.2015.7104586

Filename

7104586