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Modular Line-connected Photovoltaic PCS  

Seo, Hyun-Woo (포항공대 전자전기공학과)
Kwon, Jung-Min (포항공대 전자전기공학과)
Kim, Eung-Ho (포항공대 전자전기공학과)
Kwon, Bong-Hwan (포항공대 전자전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.13, no.2, 2008 , pp. 119-127 More about this Journal
Abstract
In this paper, the modular line-connected photovoltaic PCS (photovoltaic power conditioning system) is proposed. A step-up DC-DC converter using a active-clamp circuit and a dual series-resonant rectifier is proposed to achieve a high efficiency and a high input-output voltage ratio efficiently. An IncCond (incremental conductance) MPPT (maximum power point tracking) algorithm that improves MPPT characteristic is used. The PV module current is estimated without using a DC current sensor. By control a inverter using a linearized output current controller, a unity power factor is achieved. All algorithms and controllers are implemented on a single-chip microcontroller and the superiority of the proposed DC-DC converter and controllers is proved by experiments.
Keywords
Photovoltaic; Step-up DC-DC converter; MPPT; Modular PCS;
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