When different capacities of distributed generations (DGs) are connected to different parts of distribution network

they have a great impact on protection

especially time inverse over current protection that is commonly used in the distribution network. The various influences of the inverter-based distributed generations on the properties and action feature of the traditional time inverse over current protection is analyzed

and then a new DG optimization strategy is proposed with its limitations pointed out. Based on the detailed analysis while focusing on the application of the fault current limiter (FCL) in the distribution network with its high impedance characteristics

a new and applicable protection scheme using FCL in the distribution network is put forward. It is then verified by actual simulation of Meizhou island energy storage power station in Fujian province with the PSCAD model. The protection method used in the distribution network can effectively reduce the impact of the inverter-based distributed generations on time inverse over current protection

coordinating the distribution network and traditional protection

and ensuring stable operation of the distribution network.