With the large-scale development of new energy storage

the proportion of station electricity consumption is increasing

and improving energy efficiency has become an important way to improve the operation efficiency of power stations. In this paper

the current situation of AC/DC system of energy storage power station is sorted out from three aspects of topology

equipment and operation. The typical topology and applicable scenarios of station power consumption are reviewed. It is pointed out that the system evolves from decentralized configuration to integrated integration and multi-level transformation to less-level direct supply. The requirements of GB/T 51048-2025 for the dual-loop of station power supply of large energy storage power station are analyzed. This paper introduces the loss mechanism of station transformer

high frequency rectifier module

battery and HVAC

and points out that the cumulative loss of multi-stage transformation

light load of equipment and extensive measurement are the main reasons for low energy efficiency. The paper also analyzes the hot spots such as solid-state transformers replacing power frequency transformers and DC voltage standardization

and points out that the few-level high-fusion topology lacks engineering verification

and there are gaps such as data islands in station power consumption data and battery management systems and energy management systems. Based on this

the paper proposes a lifting path

that is

the DC bus at the topology level is directly supplied and the transformation level is compressed; the equipment level allocates the optimal capacity according to the load timing weighted efficiency; at the operational level

the sub-metering is improved

and the data link between the station power consumption and the battery management system and the energy management system is opened up

and the collaborative management and control mechanism is constructed. Finally

the development directions of low-level high-integration topology

DC protection

reliability verification of new equipment and standard convergence are prospected

in order to provide reference for the design

operation and energy-saving transformation of station power system of energy storage power station.