After the centralized integration of large-scale wind farms, the frequency dynamic stability of the network nearby will face serious challenges. Based on the existing frequency protection scheme, high-frequency protection equipment action sequence of wind turbines, conventional units and nuclear power plants is simulated for the network near wind farms in isolated operation in actual power grid. The differences between various types of units in the transient process are analyzed, frequency dynamic characteristics of the isolated regional network are studied, and the optimal allocation of high-frequency protection of the isolated network is proposed which is suitable for operating conditions combined with wind and nuclear power. The result is beneficial for protective set value adjustment after the centralized integration of large-scale wind farms.