Application Of High Efficiency Energy Storage Technology In Comprehensive Energy Services

According to the development trend of energy in the world and the environmental pollution caused by fossil fuels,State Grid Corporation of China has put forward the concept of global energy internet.Urban energy Internet is the node of global energy internet.It is an important way to improve the utilization rate,optimize the allocation of resources,provide intelligent energy services,and promote the green carpet of energy consumption.Integrated energy system is the main component of urban energy internet.It covers the design,planning,construction,implementation,operation and maintenance of multi-energy systems such as power,gas and cold and hot systems,providing customers with "all-round,integrated,one-stop" energy solutions;and,integrated energy services.The model also covers the design and planning of energy use,as well as the whole process of integrated energy projects,such as user energy trusteeship and contract energy management,energy audit,energy conservation and emission reduction.Energy storage technology is the key technology to achieve large-scale access to renewable energy and improve the efficiency,security and economy of power system.It is also an effective means to improve the clean energy generation rate and promote haze control.By the end of 2015,the total installed capacity of global energy storage will be about 167 GW,accounting for about 2.9% of the total installed capacity of global electricity,while that of China will be 22.8 GW,accounting for about 1.7% of the total installed capacity of national electricity.It is estimated that by 2050,China’s energy storage equipment will reach 200 GW,and the market will reach more than 2 trillion yuan.The existing energy storage technologies mainly include water storage,phase change energy storage,solid energy storage,compressed air energy storage,flywheel energy storage,superconducting energy storage,lava energy storage,thermal oil storage,lead-acid battery,lithium battery,sodium sulfur battery,liquid flow battery and supercapacitor.Different energy storage technologies are suitable for different applications and fields.According to system power and efficiency,re-discharge time and energy storage density,the main application fields of energy storage technology can be divided into three parts: energy management,power bridge and power quality management.In the future,the development of energy storage market will be distributed energy storage,energy storage mode,distributed photovoltaic + energy storage,distributed wind + energy storage,energy micro-grid and other distribution network side and user side fields.In recent years,China’s energy storage industry has accelerated its pace of development in terms of project planning,policy support and capacity distribution.With the rapid development of renewable energy industry in the next few years,the energy storage market will also usher in rapid growth.In this paper,the application of energy storage technology in comprehensive energy services is described.The comprehensive energy projects of Changzhi Suburb People’s Hospital and Jincheng Science and Technology Incubation Base are analyzed and introduced in detail,and the utilization of energy storage technology is analyzed.However,China’s energy storage industry is still in the primary stage of development,and is still based on demonstration applications.The commercial application of energy storage is facing many problems,such as high energy storage cost,imperfect market-oriented power trading,immature energy storage technology,diversification of energy storage methods,lack of effective incentives for energy storage price,and so on.Coexist with challenges.