Design of FRT capability and distributed voltage control of PV generation system

It is issue that reduction of carbon-dioxide emissions to prevent global warming. The PV(photovoltaic) system technologies are rapidly expanding and have increasing roles in electric power technology and regarded as the green energy. But, the increasing of PV system results in the fluctuating power from changing amount of solar insolation and temperature of solar cell. Moreover, partial shadowing has been identified as a main cause for reducing energy yield of grid-connected PV systems. It is necesary to consider MPPT(Maximum Power Point Tracking) to achive highly efficient operation. This paper also adopts MPPT control to consider partial shadow.