A New Evaluation Method for Wind Power Curtailment Based on Analysis of System Regulation Capability

With the increase of wind power curtailment more and more,how to effectively evaluate the wind power curtailment in future power grid becomes an important problem,which both macroscopic decision-making departments and wind power generation enterprises pay special attention to.A new evaluation method for wind power curtailment is proposed,and its principle is as following: for a certain level year,firstly based on typical daily load curve of each month the load curves of all days in the month are simulated,and then by means of analyzing peak load regulation ability of power sources the power grid’s space of accommodating wind power is attained;secondly the historical p.u.curve of wind power multiplied by the planned installed capacity of wind power generators is taken as the possible wind power output curve;thirdly through the comparison of power grid’s space to accommodate wind power with the possible wind power output curve the time-sequence curve of curtailed wind power of each day can be obtained.Using this curve various kind of data,such as annual wind power curtailment ratio,annual utilization hours,duration curve of annual curtailed wind power,monthly distribution of annual wind power curtailment and peak-valley distribution of annual wind power curtailment can be achieved by statistics thus the situation of wind power curtailment in the level year can be fully reflected.Using the proposed method,the situation of wind power curtailment within Northeast power grid in 2015 is evaluated.