Advanced performance control of two-stage grid-tied photovoltaic inverter with fast energy storage component

摘要

This paper proposes the advanced performance control method of two-stage photovoltaic (PV) inverter with fast energy storage component coupled. The two-stage circuit employs transient maximum power point tracking (MPPT) method to realize fast MPP tracking without causing output distortion and dc-link variation. The generated energy pulse is then absorbed by fast energy storage component. Besides, other advanced performances, such as low voltage ride through capability, can be easily reached by coordinately controlling PV generation, energy storage component and grid-tied inverter. These theoretical findings were verified by Matlab simulations.