Design Of Photovoltaic-pumped Storage Power Generation System Based On Abandoned Mine

China has abundant coal resources and a large number of mines.However,after decades of extensive mining,some coal resources have been exhausted.Coupled with the rapid development of new energy technologies in recent years and the implementation of China's capacity-removal policy,more and more coal mines have been facing transformation and closure.Although the coal mine is transformed and closed,the roadway and goaf left after the coal mining is a huge space resource.In order to make rational use of it,this paper designs a photovoltaic-pumped storage power generation system based on abandoned mine.The photovoltaic-pumped storage power generation system based on abandoned mines takes the mine roadway and goaf as the lower reservoir,and the surface coal mining subsidence area as the upper reservoir.The photovoltaic power generation part is a photovoltaic power station built on water in the subsidence water area.The system not only utilizes the space resources of the mine,but also does not occupy the land resources.It can not only improve the stability of photovoltaic power generation,but also reduce the pressure of the grid during peak load during the day.Firstly,this paper analyzes the current status of waste and the utilization of abandoned mines at home and abroad,and summarizes the development of photovoltaic power generation and pumped storage power generation,and proposes the idea of designing photovoltaic-pumped energy storage power generation system using abandoned mines.Then,according to the composition of the system,the theoretical knowledge and technical system involved in the system are introduced,including the theoretical technology of coal mine groundwater reservoir,the principle of water storage and complementary of photovoltaic power generation.In addition,the photovoltaic-pumped energy storage power generation system based on abandoned mines is introduced in detail,such as the structure,working principle and characteristics of the system,and combined with the daily load characteristics of the power grid,the peaking ability of the designed system is analyzed.Finally,the system design was carried out according to the specific conditions of the abandoned coal mine in Xinzhuang,Huainan.Based on the relevant data of the mine,the installed capacity of the pumped storage power station and the water photovoltaic power station is calculated,and the selection design o f the pump turbine and motor generator and the water photovoltaic power plant related equipment is completed.The specific situation of the Xinzhuang coal mine is The construction of the underground reservoir dam body and the anti-seepage method and the construction plan of the diversion tunnel are given.Figure [32] chart [10] Reference [51]...