A distribution network system dominated by photovoltaic (PV) power is gradually becoming an important direction for power grid development. However

the continuous increase in its penetration rate poses challenges to the stable operation of the distribution network

including voltage violations

increased distribution network losses

reverse power flow

and reduced power quality. To this end

this paper proposes a carrying capacity assessment method considering high PV penetration. A carrying capacity model for distribution network with high PV penetration and an evaluation index system for carrying capacity are established

and the carrying capacity model is solved based on second-order cone relaxation. To assess the impact of high PV penetration on the hosting capacity of the distribution network

an improved priority-CRITIC（criteria importance through intercriteria correlation）combined weighting method is used for comprehensive evaluation. To explore the effectiveness of different carrying capacity enhancement measures

the proposed carrying capacity assessment method is applied to compare and analyze various enhancement schemes. The IEEE 33-node distribution network system is used as a case study. By comparing the proposed method with existing carrying capacity evaluation methods

the comprehensiveness and effectiveness of the proposed approach are validated

and the enhancement measures are shown to effectively improve the carrying capacity of the distribution network.