Abstract: In the west region of Inner Mongolia, at night, the ongrid energy of wind farms is limited to smaller value by the power grid; and this is one of problems needing to be solved imminently; and at present, the research emphasis in wind power industry is how to increase the ongrid energy of the wind farms at night. From the point of view of several ways,increasing the night load was considered as selectable measure and was analyzed， and concrete method was put forward that is to use the heat storing electric boiler to store heat energy at night，the stored heat can be used for heat supply in daylight. The purposes of prolonging the available work hours on the network by wind farm and increasing the efficiency of green power were achieved.

Key words: heat storing electric boiler, energy storage and peak shaving, wind power generation, technology, economy, feasibility analysis