Title :
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
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;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2012 15th International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4673-2327-7
