微电源为光伏发电单元，储能设备是蓄电池作，当光伏电池工作在最大功率点，满足蓄电池和负荷供电的情况下，系统能量仍有剩余时，经过变换器向大电网输送能量；当光伏电池工作在最大功率点、蓄电池工作在最大放电模式仍不能满足负荷需求时，应由交流大电网向直流微电网补充能量。(Micro power supply for the photovoltaic power generation unit, a storage device is a storage battery, when the photovoltaic battery at the maximum power point, meet the battery and load power, the energy of the system is still remaining, after the converter to the grid energy; when the photovoltaic cells work at the maximum power point, the battery in the maximum discharge mode still can not meet the load demand, by AC grid to the DC micro grid energy.)