Abstract: In order to improve the power system line carrying capacity and power quality, a power supply quality improvement scheduling method and regulation strategy based on distributed energy storage is proposed. Firstly, a distributed energy storage scheduling scheme is established to realize the change from passive assistance to active support of energy storage equipment in improving the carrying capacity of the power system. Then, the centralized state regulation strategy and decentralized state control method of distributed energy storage are studied,and equipment field application experiments are conducted. The results show that under centralized regulation, the equipment can effectively prevent the heavy overload of the line and the back transmission of power,and can reduce the peak valley difference of the substation area by 37.6%. Under decentralized governance,the problem of insufficient local power supply capacity can be effectively addressed. The distributed energy storage regulation strategy can serve as a flexible scheduling resource for the new power system, assisting in its stable operation.

Key words: distributed energy storage, terminal low voltage, power quality management, line overload