Under the guidance of the goals of carbon peaking and carbon neutrality and continuous transformation and upgrading of the power system, a new type of power system with new energy as the main body has emerged as a significant development direction in the future. The fluctuation characteristics of clean energy have a significant negative impact on the voltage and power flow of the power grid. Considering the characteristics of distribution networks, this paper first proposes safety evaluation indicators and methods for distribution networks based on practical application scenarios after the integration of distributed photo voltaic; Then, two safety measures were established, namely the construction of new energy storage power stations and the implementation of distributed photovoltaic regulation; Finally, based on the safety assessment methods and security measures of the distribution network, a case study was conducted to study the operational safety of the distribution network and the sensitivity of security measures, providing a reference basis for the development of high proportion clean energy access schemes in different application scenarios.