Study On Serving Power Grids And Planning Method For Pumped-storage Station Considering The Consumption Of New Energy

China’s energy structure has been dominated by coal for a long time.Under the international and domestic environment of vigorously promoting energy conservation and emission reduction,it is urgent to develop new energy and realize the transformation of clean and low-carbon energy.However,due to the anti-peak regulation characteristics of new energy such as wind power,the peak valley difference of system load increases,and the difficulty of peak regulation increases.As a flexible energy storage power supply,pumped storage can effectively make up for the randomness and fluctuation of new energy output.At the same time,it also has the functions of peak shaving and valley filling,frequency modulation,phase modulation,emergency standby and black start,which plays an important role in improving new energy consumption and ensuring the safe and stable economic operation of power grid.However,at present,there is a lack of research on the evaluation of pumped storage power station’s ability to serve the power grid.Therefore,based on the actual operation data of pumped storage power station,this paper studies the evaluation method of pumped storage power station’s ability to serve the power grid,and studies the pumped storage capacity planning method considering the new energy consumption under the high proportion of new energy access.The specific research contents of this paper are as follows:(1)Based on the actual operation data,the operation mode and characteristics of pumped storage power station are analyzed.Combined with the demand of power grid for auxiliary services,and on the basis of comparing the differences of auxiliary service management rules between North China and East China,the service capacity of actual pumped storage power station for power grid is studied.(2)On the basis of real-time operation data,a dynamic evaluation model of pumped storage power station’s ability to serve the power grid based on unit operation conditions is proposed,and then an evaluation model of pumped storage power station’s ability to absorb new energy is proposed.Then,taking the actual operation data of a pumped storage power station as an example,the simulation results verify the effectiveness of the proposed evaluation model.(3)Aiming at the problem of high proportion of new energy consumption,a multi time scale iterative optimal allocation model of pumped storage capacity is proposed.In the outer layer model,the annual time scale is used to generate a set of pumped storage investment allocation capacity schemes based on the whole life cycle;Then,based on the typical source load scenario and considering the pumping and storage operation efficiency,the inner model optimizes the output level of each unit to obtain the optimal operation cost of the configuration scheme;In order to optimize the allocation capacity of pumped storage system,the internal and external iterations are carried out.Taking a certain system as an example,the effectiveness of the model is verified,and then the influence of the factors such as the regional wind power penetration,the unit capacity investment cost of pumped storage power station,the maximum allowable wind abandonment and the penalty coefficient of wind abandonment and light abandonment on the optimal allocation capacity of pumped storage is analyzed,which provides a reference for the allocation of pumped storage capacity for the system with high ratio of new energy consumption.