Abstract: Given the context of multi-infeed DC power and the high percentage penetration of renewable energy sources,accurately evaluating the maximum absorptive capacity of power grid renewable energy sources,taking into account the randomness of renewable energy output and the security constraints of the system network,is of great significance for promoting the absorption of renewable energy sources. To address these challenges,this paper proposes a method for evaluating the maximum absorption capacity of new energy based on network security and stability constraints. The paper considers the impact of generator set regulation characteristics,multi-DC regulation power,and other factors on the maximum absorption capacity of new energy. A probability distribution discrete model is employed to describe the random nature of new energy distribution. A calculation model of new energy consumption capacity constrained by static voltage stability of the power grid and generator output is established. The proposed model establishes a calculation framework for new energy absorption capacity constrained by the static voltage stability of the power grid and generator output. By calculating discrete probability,the model enables the realization of a new energy grid-connected multi-scene state simulation,thereby solving the discrete distribution of the maximum absorption power of new energy and then making out this maximum absorption capacity of new energy under multiple scenarios of operation. An improved IEEE 39-node system is adopted in this paper for multi-scene simulation analysis,whose results indicate that the proposed new energy absorption capacity calculation method based on network security and stability constraints can effectively reflect the new energy absorption capacity under multiple scenarios.