INVERT APPARATUS HAVING A FUNCTION OF DYNAMIC MPPT AND THE DYNAMIC MPPT METHOD THEREOF FOR SOLAR GENERATING SYSTEM

摘要

The present invention relates to: an inverter apparatus having a dynamic maximum power point tracking (MPPT) function for a grid-connected photovoltaic power generation system for rapidly and precisely tracking voltage of MPPT under a dynamic condition in which insolation suddenly changes; and a dynamic MPPT method of the inverter apparatus. The inverter apparatus comprises: an MMPT control unit for storing current and voltage measurement information of a power measurement unit for a specific number of MMPT control cycles by receiving detected values of output current and voltage of a photovoltaic cell unit, and then, for outputting an MMPT control signal for adjusting output voltage of a DC/DC converter unit in order to move an MMPT operation site to the opposite direction, if the voltage continuously increases or decreases during the specific number of MMPT control cycles; and the DC/DC converter unit for adjusting a voltage level of direct current power generated in the photovoltaic cell unit depending on voltage variance reference voltage included in the MMPT control signal of the MMPT control unit. Therefore, the inverter apparatus prevents MMPT from failing in a dynamic condition in which insolation suddenly changes and enables MMPT to be rapidly and efficiently performed, thereby increasing efficiency of the photovoltaic power generation system.