With the increasing proportion of renewable energy，the pressure on peak shaving and frequency regulation in power systems is gradually intensifying，and existing scheduling methods cannot consider both system security and new energy consumption.This paper proposes a scheduling method for carrying capacity enhancement of new energy based on the coordination between nuclear power and energy storage.Firstly，by analyzing the spatiotemporal complementary characteristics of nuclear power units and energy storage devices，the coordinated role of both in peak shaving and frequency regulation is fully explored to build a scheduling model for nuclear storage coordination.Then，a collaborative transmission and distribution scheduling framework is constructed to develop reasonable day-ahead optimization strategies by decoupling the scheduling requirements of transmission grids and distribution networks，and improve the carrying capacity of new energy in power systems.Additionally，frequency security constraints are introduced to analyze their influence on power syste m stability and renewable energy consumption.Finally，case analysis is conducted to validate the effectiveness and practicality of the proposed method.The results show the proposed method has significant advantages in reducing the total costs of systems，enhancing renewable energy consumption，and improving frequency regulation.As a result，theoretical support can be provided for nuclear power units to deeply participate in peak shaving and frequency regulation of power grids.