Enhanced LCMPPT Control Strategy for Single Stage Power Conversion

Abstract

The authors previously proposed a new maximum power point tracking strategy based on limit cycle phenomena (LCMPPT) for a grid connected PV system with dc linked two power conversion stages. This paper enhances its principle for the systems with single power conversion stage such like a battery charging system. Since, it needs only one current sensor, it is cost effective being easy to implement by using a low cost PIC microprocessors. Experimental results in proto-type system have been shown to prove its validity and usefulness.