Energy management in grid connected PV systems with supercapacitor energy storage

Author

Kang, Qing ; Xiao, Xi ; Yi, Hu ; Nie, Zanxiang

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

5

Abstract

A grid connected photovoltaic(PV) generation system with supercapacitor energy storage in a dc-coupled structure is proposed. The objective of this system is acquiring maximum power from PV arrays, keep the voltage of dc bus constant and supply the prescribed active and reactive power to power grid. An improved Perturbation and Observation (P&O) maximum power point tracking(MPPT) algorithm is applied to extract maximum power from PV arrays. The dc bus voltage is controlled via supercapacitor by charging and discharging. Constant active and reactive power control strategy is designed for the controller of DC/AC converter. Simulation results illustrate the performances obtained.

Keywords

DC-AC power convertors; energy management systems; maximum power point trackers; photovoltaic power systems; power grids; reactive power control; supercapacitors; DC-AC converter; PV arrays; dc-coupled structure; energy management; grid connected photovoltaic systems; maximum power point tracking; perturbation and observation; reactive power control strategy; supercapacitor energy storage; Inverters; Power generation; Power grids; Reactive power; Supercapacitors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073393

Filename

6073393