A digital control of power leveling unit with super capacitor for distributed generator

Author

Hamasaki, S. ; Yoshioka, Shohei ; Tsuji, Mineo

Author_Institution

Nagasaki Univ., Nagasaki, Japan

fYear

2012

fDate

21-24 Oct. 2012

Firstpage

1

Lastpage

6

Abstract

The power leveling (PL) unit is required to maintain a balance of power flow for photovoltaic (PV) system. It is important for it to respond quickly against fluctuation of power generation. A new control scheme based on discrete time system for the PL unit in the distributed generator (DG) is proposed to improve the response. In the proposed method, the deadbeat control is performed using state equations obtained from a combination of two-quadrant chopper and super capacitors. The optimal duty ratio of PWM can be calculated and good performance of the current regulation is obtained. The control theory and the simulation results are presented in this paper.

Keywords

digital control; distributed power generation; load flow; photovoltaic power systems; power generation control; supercapacitors; control theory; current regulation; deadbeat control; digital control; discrete time system; distributed generator; optimal duty ratio; photovoltaic system; power flow; power generation; power leveling unit; state equations; super capacitor; two-quadrant chopper; Capacitors; Choppers (circuits); Discharges (electric); Inverters; Load flow; Steady-state; Voltage control; deadbeat control; distributed generator; power leveling; super capacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2012 15th International Conference on

Conference_Location

Sapporo

Print_ISBN

978-1-4673-2327-7

Type

conf

Filename

6401774