Comprehensive Research on the Output and Economic Sensitivity of the Integrated System of Photovoltaic and Energy Storage Under the Load Demand Orientation

Household energy storage has significant capabilities to optimize the user load curve and assist in coordinating distributed photovoltaic power generation. In order to explore the output of the integrated photovoltaic and energy storage and its economic sensitivity more deeply, this article builds an integrated photovoltaic and energy storage operation model based on the load demand, and takes a certain household energy storage in Xi'an as an example to conduct in-depth analysis of the integrated photovoltaic and energy storage system through software simulation. The research shows that configuring energy storage can greatly reduce the amplitude of load fluctuations, make the photovoltaic output more stable, significantly improve the self-consumption rate of photovoltaic, and reduce the amount of electricity bills paid by users actually. For example, in this case, the study found that after configuring energy storage, the self-consumption rate of photovoltaic power can be increased by 36.92%, and the user's electricity bill can be reduced by 45,631 yuan. Moreover, when the self-consumption rate of the photovoltaic power generation system is at a relatively high level, the financial sensitivity coefficient of the energy storage cost and the grid-connected electricity price is relatively high, and it should be set as the main control item, while the electricity purchase price is set as the secondary control item, so as to effectively enhance the financial risk resistance ability of the engineering project. The results of this study are of great significance for promoting the development process of the integrated household photovoltaic and energy storage.