Title :
Robust DC-link voltage control scheme for photovoltaic power generation system PCS
Author :
Park, Joon Sung ; Choi, Jun Hyuk ; Gu, Bon Gwan ; Jung, In Soung ; Lee, Eun Chul ; Ahn, Kang Soon
Author_Institution :
Korea Electron. Technol. Inst., Seongnam, South Korea
Abstract :
A power conversion system (PCS) for photovoltaic power generation system is composed of the DC/DC converter and the DC/AC inverter. To maximize power generation, DC/DC converter operated with MPPT (Maximum Power Point Tracking) algorithm and the PCS has been developed by the method of transformer tab change. DC/AC inverter controls DC-link voltage and grid current. But, single phase grid has 120 Hz (Grid voltage frequency is 60 Hz.) power ripple which arise DC-link voltage ripple. This paper presents a robust DC-link voltage control scheme. The control scheme utilizes a widow averaged DC-link voltage as a feedback signal. Experiment performed with 3 kW PCS and the results support the validity of the control scheme.
Keywords :
DC-DC power convertors; invertors; photovoltaic power systems; power generation control; robust control; voltage control; DC- link voltage ripple; DC/AC inverter; DC/DC converter; MPPT algorithm; PCS; feedback signal; frequency 120 Hz; frequency 60 Hz; grid current; grid voltage frequency; maximum power point tracking algorithm; photovoltaic power generation system; power 3 kW; power ripple; robust DC-link voltage control scheme; single phase grid; transformer tab change; widow averaged DC-link voltage; DC-DC power converters; Feedback; Frequency; Inverters; Personal communication networks; Photovoltaic systems; Power conversion; Robust control; Solar power generation; Voltage control;
Conference_Titel :
Telecommunications Energy Conference, 2009. INTELEC 2009. 31st International
Conference_Location :
Incheon
Print_ISBN :
978-1-4244-2490-0
Electronic_ISBN :
978-1-4244-2491-7
DOI :
10.1109/INTLEC.2009.5351880
