English: To address environmental and climate issues, vigorously developing new energy sources such as wind and solar energy has become a common choice for countries around the world to formulate energy policies and promote clean energy transformation. The country has clearly proposed to incorporate "carbon peaking" and "carbon neutrality" into the overall layout of ecological civilization construction and to build a new type of power system with new energy as the main body. Under the paradigm of the new power system, new energy is the main source of power supply, smart grid is the hub platform, and source, grid, load, and storage interaction and multi-energy complementarity are the support. However, the current problem is that with the gradual advancement of the construction of new power system, the system voltage level continues to rise, and voltage fluctuations become more severe. High frequency and high-intensity voltage shocks affect the operational reliability of key equipment; The proportion of new energy connected to the grid has significantly increased, and more and more new energy generation units are connected to the grid through power electronic equipment, which exacerbates the complexity of harmonic components in the power system, leading to accelerated insulation aging, overheating of critical equipment, and even shortening the lifespan of critical equipment. Based on this background, it is urgent to propose a new risk assessment method for new power system, providing a quantitative decision-making basis for system planning and operation, and ensuring the safe and reliable operation of the system. To ensure the safe and stable operation of the new power system, it is necessary to conduct in-depth research on the control and operational characteristics of the new power system and overcome bottleneck issues such as new power system status monitoring technology, new power system risk assessment technology, and new power system fault diagnosis technology. This topic aims to explore the current development status and future development direction of key technologies that contribute to the reliable, safe, and stable operation of new power system from two aspects: system state assessment and fault diagnosis.

中文: 为解决环境和气候问题，大力发展风能、太阳能等新能源已成为世界各国制定能源政策和推动清洁能源转型的共同选择。我国明确提出将"碳达峰"、"碳中和"纳入生态文明建设整体布局，构建以新能源为主体的新型电力系统。新型电力系统以新能源为主要电源，以智能电网为枢纽平台，以源网荷储互动和多能互补为支撑。然而当前问题是随着新型电力系统建设的逐步推进，系统电压水平不断提高，电压波动更加剧烈，高频次、高强度的电压冲击影响关键设备的运行可靠性；新能源并网比例显著提升，越来越多的新能源发电机组通过电力电子设备并网，加剧了电力系统谐波成分的复杂性，导致绝缘加速老化、关键设备过热等问题，甚至缩短关键设备寿命。基于此背景，亟需提出新型电力系统风险的新评估方法，为系统规划和运行提供定量决策依据，保障系统安全可靠运行。为保障新型电力系统安全稳定运行，需要深入研究新型电力系统的控制与运行特性，攻克新型电力系统状态监测技术、新型电力系统风险评估技术、新型电力系统故障诊断技术等瓶颈问题。本专题旨在从系统状态评估和故障诊断两个方面探讨有助于新型电力系统可靠安全稳定运行的关键技术的当前发展现状和未来发展方向。