Studies on the Energy Storage System in the Distribution Transformer Supply Zone

In order to reduce carbon emission and utilize renewable energy, the energy storage technology is considered as an effective technical method. However, due to the influence of its operational control strategy, the fault characteristics of energy storage systems are different from those of traditional synchronous power sources. Besides, energy storage systems are capable of charging and discharging, which makes their output characteristics different from new energy sources as well. Therefore, energy storage systems, if connected in the distribution transformer system zone, will have serious impacts on the regulation of traditional distribution networks. Therefore, this work firstly studies the fault characteristics of energy storage system. Then, the impacts of energy storage system on distribution network protection are analyzed from two factors. The research results will provide technical insight into how to connect and operate the energy storage system in the distribution transformer system zone.