Regional power line faults may cause short-time congestion on other lines and power supply shortage of the important load in the region

which may result in a large number of generator tripping and load shedding. To deal with the problem

a configuation optimization method of multifunctional hybrid energy storage for regional power line faults is proposed. The proposed method considers the response time of each power source unit

configures power-type energy storage optimally and cuts some non-critical load to relieve the short-time power grid congestion. The power supply demand index of the important loads in the corrective maintenance period is considered

and energy-type energy storage is configured optimally to guarantee the power supply of important loads in the region based on the configured power-type energy storage. Finally

the total investment of the hybrid energy storage is selected as the objective

the case studies are performed in a real power system

the sensitivity analysis of some key parameters for the configuration solution is given and the correctness of the proposed model and method is validated.