Research On Source-load Coordinated Dispatching Considering New Energy Consumption

Facing the dual crisis of the depletion of fossil energy and the continuous deterioration of the environment,new energy power generation represented by wind power and photovoltaic power has become an irreversible trend in the future energy development.However,wind power and photovoltaic power generation have randomness and fluctuation,which make the difference between load peak and valley increase continuously.As a traditional peak shaving resource of power system,thermal power generally has the problems of insufficient regulation capacity and lack of peak shaving initiative,which can’t meet the peak shaving demand under the background of high proportion of new energy into the grid.With its flexible and rapid response ability,demand response has become a new way to solve the consumption of new energy.This paper aims to improve the consumption level of new energy through the coordinated scheduling of resources on the power supply side and demand side.The main research contents and results are as follows:(1)The operation characteristics of common power sources in power system are sorted out,and their power supply models are established.Besides,the demand side resources are studied,the demand response is divided into price based and incentive based demand response,and their response characteristics are analyzed.(2)Focusing on the power supply side,it is proposed to use the complementary characteristics of multiple types of power supplies in the system to improve the consumption level of new energy.Opportunity constraints are adopted to consider the impact of new energy generation prediction error on rotating reserve capacity,and the peak shaving initiative constraint is introduced to improve the enthusiasm of thermal power peak shaving.A multi-source power system optimal dispatching model including wind power,photovoltaic power,hydropower,thermal power and energy storage is established,and an example is given to verify the effectiveness of the proposed model.By adjusting the confidence level of reserve capacity constraint,the reliability and economy of system operation are balanced.(3)Focusing on the demand side,based on the research of multi-source complementary optimal scheduling,the impact of introducing electric flexible load on new energy consumption is further explored.A source-load coordinated scheduling model considering transferable load,translational load and reducible load is established.The simulation results show that the reasonable scheduling of flexible load can effectively realize peak cutting and valley filling,so as to alleviate the peak shaving pressure of thermal power units,reduce the operation cost of the system,and further increase the consumption of new energy.