Research On The Optimal Configuration Of Power Grid Emergency Reserve To Deal With The Risk Of New Energy Output Fluctuations

In recent years,the installed capacity of renewable energy has grown rapidly in China.The centralized grid connection of renewable energy has caused a surge in reserve demand for the power grid.However,simply relying on conventional reserve for risk management and control obviously cannot meet the operational requirements of the power grid with large-scale renewable energy.With the development of the power grid,the degree of intelligence is constantly improving.Technical conditions for unconventional reserve,especially emergency reserve which can participate in shortterm dispatch are maturing.Research on the single-region optimal configuration of emergency reserve is beneficial to improve the reliability of grid operation.At the same time,the interconnection construction of the power grid has begun to take shape.It is of great significance to study the cross-region optimal configuration of emergency reserve for improving the resource allocation level of interconnected power grid.Based on the above analysis,the single-region and cross-region optimal configuration of emergency reserve are studied in deep.The main contents are as follows:Firstly,the output characteristics of renewable energy and the impact of large-scale connection on power grid are analyzed in deep in the thesis.Based on the analysis,the issue with reserve participation in the ancillary service market is discussed and the concept of emergency reserve is introduced.In this thesis,the relationship between emergency reserve and conventional reserve is discussed in detail.Then,in this thesis,the adjustable ability of power generation plan or power consumption plan is taken as a criterion,the existing resource of emergency reserve in power grid is excavated,and their characteristics are analyzed,so as to serve as the basis for the follow-up research of optimization and configuration of emergency reserve.Secondly,in order to solve the problem of single-region optimal configuration of emergency reserve,the concept of risk is taken as the basis to minimize the total cost of regional risk control and improve single-region optimal configuration model of emergency reserve.Based on the improved model,the criterion of Cost Performance Ratio(CPR)is improved.Subsequently,the improved algorithm of single-region optimal configuration of emergency reserve is explored in the thesis.The improved algorithm is implemented on Dynamic Simulation Platform for Macro Energy Systems(DSPMES)of NARI Group.Through the simulation analysis,it is verified that the introduction of emergency reserve can improve the ability of power grid to respond to emergencies,and it is also verified that the improved algorithm is adaptive in dealing with different predictive inputs.Finally,in order to solve the problem of cross-region optimal configuration of emergency reserve,the model and algorithm of single-region optimal configuration are taken as the basis to minimize the total cost of global risk control.In the thesis,the transmission power constraint of connection line in each period is taken into consideration,the idea of "risks are transmitted across regions through connection lines,which in turn drives the sharing and mutual benefit of multiple regional reserve resources" is formed.Based on this idea,cross-region optimal configuration model and algorithm of emergency reserve are established in the thesis.This algorithm is designed to replace the emergency reserve with poor CPR in the receiving area by the emergency reserve with better CPR in the sending area.The algorithm is implemented based on DSPMES.Through the simulation analysis,it is verified that the algorithm can better coordinate the resource of global emergency reserve.Also,this algorithm can play a role in reducing costs,controlling risks and improving efficiency when sharing power resources.