A Model to Analyze Peak Load Regulation of Provincial Power System Considering Sending-out of Wind Power

The intermittence and peak load counterregulation effect of wind power make the provincial power grids located in the provinces rich in wind resource having to be forced with the problems of peak load regulation and accommodation of massive wind power,and to solve the problem of accommodating massive wind power it is effective to construct high-capacity transmission line to send out wind power.To cope with the effects of post-construction of transmission line to send out wind power on system peak load regulation and accommodation of wind power,a model to analyze peak load regulation of provincial power system considering sending-out of wind power,in which the sending-out of wind power is considered,is built.Taking the prediction of wind power output into account and based on original load,a new equivalent load,in which the wind power output is regarded as negative load,is formed;then considering the peak load shifting effect of hydropower generating units and the auxiliary load regulation effect of transmission line sending power out,a model to arrange output of regular power units in the whole provincial power grid is established,and on this basis the peak load regulation of the provincial power grid is analyzed.Taking a provincial power grid in China that is rich in wind energy source as example,the simulation analysis is performed,and simulation results show that the construction of transmission line to send out wind power can reduced the abandoned wind energy and the ability of accommodating wind power is enhanced,in addition,the peak load regulation at both sending end and receiving end can be complementary,thus it is proved that the proposed suggestion is favorable to the sustainable development of wind power base.