内蒙古电力科技园智能微电网运行特性研究

Research about Inner Mongolia Electric Power Science and Technology Park Smart Microgrid Operation Characteristics

对内蒙古首个智能微电网——内蒙古电力科技园智能微电网进行了并网转离网试验,结果证明:当主网失电时,借助储能系统,微电网可以在7 s内完成由并网转离网模式切换。作为网内扩容的前期研究,比较了12个月微电网内2种额定功率均为10 kW的光伏及风力发电系统的发电情况,前者月均发电量比后者高82.5%,因此建议后续微电网电源的接入选择应以光伏系统为主。设计了一种离网的电动汽车充电方案,并使用网内RLC负载模拟电动汽车进行30min的充电试验,从功率平衡角度证实了该充电方案的可行性。

The study was centered around the first smart microgrid of Inner Mogolia, the Inner Mogolia Electric Power Science and Technology Park Smart Microgrid. The on-grid to off-grid experiment proved that when the microgrid was disconnected from the distribution grid, with the support of energy switching system, the microgrid′ s operation mode could be switched from on-grid to off-grid mode within 7 s. As the research for enriching microgrid′ s energy capacity, this article analysised two kinds of distributed generations（wind power system and photovoltaic system） during one year. The result showed that, in terms of both 10 kW generators, the photovoltaic system′ s energy output was 82.5%, higher than wind power system, making it evident that photovoltaic system may be more ideal source for the microgrid. An off-grid charging scheme for electrical vehicle was proposed, and then experiment was conducted in which electrical vehicle was replaced by RLC load aiming at protecting the vehicle. The charging experiments was lasted for half an hour, which was verified in the aspect of power balance.