Tentative Analysis of Microgrid Access Voltage Level

The distribution power sources and loads are integrated by microgrid technology, which could electively relieve the impacts of distribution power sources on large power grid. So, microgrid is an effective way for distribution power sources´ large-scale application. There is unavailability of official release on the microgrid standard as yet at home and abroad, and grid-connected standard should be the most important standard for preferential consideration. In this paper, basic technical requirements of microgrid´s grid connected operation are discussed, based on its typical operation characteristics; on the basis of full consideration of microgrid´s characteristics and its impacts on distribution network´s power quality, some factors are proposed to be considered when microgrid access voltage level is determined; at last, some proposals for developing the microgrid standard system are presented for future research on microgrid.