基于安全域的并网型微电网能量优化新方法

New method of energy optimization for grid-connected microgrid based on security region

提出一种基于安全域的并网型微电网能量优化新方法。提出并网型微电网安全域的定义与模型,分别对N-0安全与N-1安全的微电网安全域进行刻画;考虑微电网的安全性与经济性,以微电网经济效益与馈线安全距离为优化目标,建立一种基于安全域的微电网能量优化模型,在规划安全域范围内采用YALMIP工具箱与CPLEX求解器对模型进行求解。算例展示了微电网安全域,验证了能量优化模型的有效性。相较于现有方法,所提方法能够量化系统安全裕度,综合考虑微电网的安全裕度与经济效益。

A new method of energy optimization is proposed for grid-connected microgrid based on security region.The definition and model of grid-connected microgrid security region are proposed,and microgrid security regions of N-0 security and N-1 security are described.Considering the security and economy of microgrid,an energy optimization model of microgrid is established based on security region,which takes the economic benefit and feeder security distance as its optimization objectives,and YALMIP toolbox and CPLEX solver are adopted to solve the model in the planned range of security region.An example is used to show the security region and verify the effectiveness of the energy optimization model.Compared with the existing method,the proposed method can quantify the system security margin,and comprehensively consider the security margin and economic benefit.