2008年初中国南方极端冰雪灾害给电力基础设施造成了极大破坏，也引发了对电网安全评估、防御系统设计的诸多思考。该文分析极端冰雪灾害下电力系统安全评估研究现状和新的技术需求，设计考虑冰雪灾害影响的电网安全评估框架，并讨论需解决的关键问题以及各功能模块之间的交互关系。提出气象–电气混合仿真的概念并讨论混合仿真实现的途径。借助PSS/E编程实现基于简化线路覆冰和杆塔受力模型的覆冰–电气混合仿真，算例仿真表明该混合仿真方法可以计算得到给定覆冰模型下气象事件与电气动态的交互影响过程。

In early 2008, extreme ice rain struck the power system infrastructures in Southern China, which caused great losses and has triggered lots of reflection on security assessment and defence systems. Technology requirements of power system security assessment considering extreme ice disasters were analyzed, the assessment framework was designed and presented, and the key issues to be resolved and the organization of sub-modules were discussed in this paper. The concept of mixed numerical simulation of weather dynamics and electrical dynamics was proposed. How to implement the mixed simulation was discussed. Based on the PSS/E, a method to simulate the interaction between ice accretion process on transmission line and electro-mechanic dynamics was presented. Numerical simulation results show that the mutual influence between conductor icing and electrical process can be revealed by the proposed method.

国家自然科学基金项目(50807031)。