Abstract: This study aims to address the increasing demand for network security in the new power system, where renewable energy sources play a dominant role. Given the relative scarcity of domestically developed infrastructure and information products with independent intellectual property rights in our country's power system, the underlying risks remain a significant concern.In this study, the characteristics of the new power system were analyzed to identify the network security risks it faces. A protective framework targeting network security in the new power system was developed. Furthermore, typical business application scenarios in the generation-network-load-storage links were examined to establish security protection requirements and prioritize protective measures.The analysis revealed the elevated importance of network security in the new power system due to its reliance on new energy sources. The constructed protective framework offers comprehensive measures to mitigate identified risks. By focusing on specific business application scenarios, this study provides tailored security protection requirements and emphasizes key protective measures. This research highlights the significance of network security protection for the new power system. The findings emphasize the need to address the unique challenges associated with the dominance of new energy sources. The proposed protective framework and recommended measures offer a basis for enhancing the overall network security of the new power system。