Day-ahead microgrid energy management optimization scheduling scheme

摘要

A day-ahead microgrid energy management optimization scheduling scheme is proposed in this paper. The object is to optimize the output power of DERs (distributed energy resources, DERs). The objective function includes operating cost and maintaining cost of lithium battery and fuel cell, the interruptible compensation of interruptible loads and electricity price. In day-ahead scheduling stage, a battery operating cost function is derived. The lifetime loss of lithium battery at different DOD (depth of discharge, DOD) is calculated as specific operating cost. Electricity price at different periods is considered. Operating cost of PV in two working modes is considered too. They are MPPT mode and controllable mode. In controllable mode, the output power of PV is controllable. According to day-ahead prediction of PV output power and load, the total operating cost is set as objective function. In case study, LINGO 11.0 is used to calculate the model whose data comes from the real lab-scale microgrid. The experimental result shows that the proposed scheduling strategy in this paper is reasonable.