海岛直流微电网电压等级序列选择的研究

Research on voltage class series option in island DC microgrid

直流微电网是未来智能电网的重要组成部分。目前,国内外关于海岛微电网电压等级选择的研究还处于初级阶段。本文在借鉴传统交流配电网电压等级序列选择的基础上,结合海岛负荷需求特点,分析了海岛负荷的供电需求、分布式电源的接入需求、配电方式、供电能力等影响因素,并在充分考虑上述影响因素下,给出了海岛直流微电网电压等级序列的三种范围。最后,以某星形拓扑结构海岛为例,确定其直流电压等级序列,并从经济性层面上分析了海岛电压等级序列与成本之间的关系,为未来海岛微电网的电压选择提供借鉴。

DC microgrid is an important part of future smart grid. Recently,researches on the selection of voltage class series in the island DC distribution network are in quite primary stage at home and abroad. Based on the references of optimum option of voltage class series in the traditional AC distribution network and the characters of the island loads,this paper analyzes various kinds of influence factors,such as the power demands of the loads,the access requirements of DGs,the forms of supply and the power supply abilities,etc,and then the three ranges of voltage class series are proposed in this paper. Besides,the voltage class series of an island is determined considering its star topology and loads. Finally,the relationship between voltage class series and cost from the aspect of economy is introduced at the end of paper,which may provide references for design of other types of island DC microgrids.