Research On Spinning Reserve Optimization Of Power System With Large-scale Wind Power Penetration

Wind power is a kind of renewable energy,the development of wind power is conducive to improving the energy structure.However,due to the random fluctuation of wind power output,traditional methods to decide spinning reserve are no more appropriate.In order to maintain the active power balance,a more reasonable spinning reserve capacity allocation will in great need when the large-scale wind power integrates in power system.Therefore,this paper studies methods for optimal spinning reserve allocation of power system containing large-scale wind power.Firstly,this paper introduces the method of solving mixed integer programming with CPLEX solver by GAMS and the basic principle of primal-dual interior point method,which lays the foundation for the following chapters.Secondly,to deal with inherent stochastic nature of wind power,configuring corresponding spinning reserve capacity by a certain proportion of wind power output based on traditional methods is presented,and a wind power reserve ratio optimization model with multiple energy sources is constructed.The MATLAB and GAMS software is used to solve the model.Taking a provincial power grid as example,advantages of the proposed method in reducing load shedding and improving utilization ratio of wind power are verified.Economic benefits of optimal wind power reserve ratio are also validated.The sensitivity analysis shows that when the higher the wind power penetration,the lower the wind power prediction accuracy,the higher the cutting load coefficient,or the characteristics of wind power inverse peak shaving,the economic advantages of wind power reserve ratio optimization method is more significant.Finally,in order to optimize the spinning reserve capacity of each period,a combinatorial optimization algorithm is proposed.The integer and continuous variables of mixed integer programming are dealt with separately,which are divided into inner and outer modules.The outer module is used to adjust the unit start-stop plan.And the inner module in the use of the original dual-point method to optimize spinning reserve capacity allocation.Thus,this algorithm effectively shortens the calculation time.Taking the IEEE 10 machine 39-bus system as example,the rationality and validity of the proposed model and solving method are verified.At the same time,a comparison and analysis of the two methods of this paper with the traditional method are presented.Results show that these three methods all have their own advantages and disadvantages.So they can be applied to different system and have important guiding significance for engineering practice applications.