Optimal Spinning Reserve Capacity In The Wind Power Integrated Power System Considering The Coordination Between Sources And Loads

Integration of wind power brings more uncertainties to the power system,which requires power grid companies to buy more spinning reserve in order to maintain power balance and stability of power system.At this time,it is not enough only rely on conventional power to participate in adjusting,to provide spinning reserve.Therefore,fully exploiting the other regulatory resources in the system,optimizing spinning reserve configuration considering operation reliability and economics of power system is of great significance.This paperconsiders the coordination effect of interruptible load and wind power curtailment as special spinning reserve resource and the spinning reserve resources of the traditional generating units,according to the characteristics of the spinning reserve demand of the wind power integrated power system,proposes a probabilistic spinning reserve optimization method based on multi-scene.First of all,this method considers the uncertainties of wind power,load and conventional generators on the spinning reserve requirements,uses Monte Carlo simulation method to establish the model of uncertainty factors.Secondly,according to the established uncertainty factor model,based on the scene analysis method,reasonably reduce all the running scenes of the system to obtain a group of the most likely operating state of the system,transforms the complex and uncertain factors in the system into multiple deterministic scene problems,and quantifies the uncertain factors.In addition,the method considers interrupted load and wind power curtailment as special spinning reserve into day-ahead power generation scheduling,analyzes and calculates interrelationship between the uncertainties,spinning reserve requirement,interruptible load and wind power curtailment,and expresses it by way of mathematical expression.Finally,the unit commitment optimization model is established based on the minimum total purchase cost of the system.Based on the traditional unit commitment objective function which includes only the fuel cost and operating cost of the unit,the conventional spinning reserve cost and the cost of compensation for the interruptible load and wind power curtailment is added,in order to reduce the impact of more spinning reserve demand on the system cost,obtain theconfiguration of spinning reserve to optimize the system economy.Based on the simulation of IEEE 30-bus system and IEEE 118-bus system,it is verified that the spinning reserve optimization model considering the integrating of interruptible load and wind power curtailment in this paper can effectively reduce the cost of the system purchase,save the spinning reserve resources,has a guiding significance for the spinning reserve of wind power integrated power system and the comprehensive integration of system resources.