储能在解决可再生能源发电不稳定性、间歇性问题上具有提高电网输配容量和控制电频波动的作用。合理的经济效益收益模式是储能发展的关键，为明确当前电力现货市场环境下储能系统的合理经济收益模式及主要影响因素，挖掘我国储能市场潜力，通过优劣势(strengths weakness opportunity threats, SWOT)分析模型分析其内外部环境。在此基础上，基于储能参与辅助服务市场和电力现货市场交易的特性分析，采用内部收益率(internal rate of return，IRR)模型，以江苏省某储能系统为例，研究在电力现货市场下储能系统经济效益量化的问题。以经济效益最大为目标构建模型并利用线性规划进行求解，在多个情景下验证电力现货市场下储能系统的经济效益。最后，从技术和经济2个不同角度，通过案例研究影响当前储能系统经济性的最主要因素，算例结果表明：基于技术角度，充放电循环次数是主要影响因素；基于政策定价角度，峰谷价差水平是主要影响因素。随着我国储能系统投资成本及技术水平的进步，在电力现货市场全面放开的背景下，储能系统将具有越来越强的经济效益。

Energy storage can improve the transmission and distribution capacity of power grid and control the fluctuation of power frequency in solving the problems of instability and intermittence of renewable energy generation. Reasonable economic benefit model is the key to the development of energy storage. In order to clarify the reasonable economic benefit model and main influencing factors of energy storage system in the current electricity spot market environment and tap the potential of China's energy storage market, this paper analyzes its internal and external environment through strengths weakness opportunity threats (SWOT) analysis. On this basis, based on the analysis of the characteristics of energy storage participating in the auxiliary service market and the electricity spot market, the internal rate of return (IRR) model is adopted, and an energy storage system in Jiangsu province is taken as an example to study the quantification of the economic benefits of the energy storage system in the electricity spot market. The economic benefits of the energy storage system in the spot electricity market are verified in several scenarios by building a model with the goal of maximizing economic benefits and solving it by using linear programming. Finally, from two different angles of technology and economy, the most important factors of current energy storage system economy are found through case study. The calculation results show that, from the technical point of view, the number of charge and discharge cycles is the main influencing factor; Based on policy pricing, the peak-valley price difference level is the main influencing factor. With the progress of investment cost and technical level of energy storage system in China, energy storage system will have stronger and stronger economic benefits under the background of full liberalization of power spot market.