Energy Storage Configuration Method for Low-Voltage Distribution Stations Taking Into Account Economy and Power Supply Reliability

Abstract

To address the reliance on fossil fuels, a significant number of photovoltaic systems have been integrated into the power grid. This has led to a situation where the locally generated photovoltaic power cannot be consumed on-site, causing an increase in the voltage of the distribution network and potentially exceeding limits. Additionally, this results in an increase in network losses within the distribution network. Energy storage systems have a high degree of versatility and can be utilized to address the issue of misalignment between solar panel output and energy demand due to grid-connection of photovoltaic systems. This is achieved through the system’s quick charging and discharge capabilities, and its ability to control the charging and discharge state.This paper presents models for optimal energy storage allocation in both normal operations and failure situations. It outlines a process for allocating energy storage that balances economic considerations with power supply reliability. To illustrate the effectiveness of the energy storage system in enhancing the distribution network, a practical example is provided in a substation, both under normal and fault conditions.