An efficient wind-photovoltaic hybrid generation system for DC micro-grid

Clean, renewable and abundant natural distributed energy resources (NDER) present a promising way to solve the problem of shorting resources. The concept of DC micro-grid provides a platform to integrate power generation of these NDER. However, various DC voltage ratings are used in different systems, which bring troubles when designing the DC microgrid. The purpose of this paper is to suggest a voltage selection guideline and propose an efficient windphotovoltaic (PV) hybrid generation system for the DC micro-grid. This hybrid generation system is constituted by a wind power generation branch and a PV power generation branch. Hence, this hybrid generation system forms a highly independent generation system from day to night.