特高压交直流电网的小干扰稳定性分析

Small Signal Stability Analysis for UHV AC/DC Power Grids

分析了我国小干扰稳定仿真技术存在的主要问题,提出了解决问题的思路,包括:结合广域测量系统(wide area measurement system,WAMS)的小干扰稳定性分析、中长期过程中的小干扰稳定性分析、特征值的区域自动搜索算法、特征值灵敏度研究与应用、小干扰稳定在线预决策技术等。探讨了小干扰稳定性分析软件与在线动态安全分析预警系统的接口技术,以及并行计算技术的重要性,并指出小干扰稳定性分析技术是研究和分析特高压交直流电网低频振荡问题及其稳定措施的重要手段。

Along with the rapid development of UHV power grids in China, the static and dynamic behaviours of power grids become more and more complex, so special attentions are paid to small signal stability analysis. In this paper, the main problems existing in the simulation of small signal stability analysis in China are analysed and the thinking to solve these problems are put forward. They are： small signal stability analysis combining with wide area measurement system （WAMS）, small signal stability analysis for medium- and-long-term process, regional automatic searching algorithm of eigenvalues, research and application of eigenvalue sensitivity and online pre-decision-making for small signal stability and so on. The technique for interfacing small signal stability software with online dynamic security analysis for early warning system as well as the significance of adopting parallel calculation are researched. It is pointed out that small signal stability analysis is an important means for the research and analysis on low-frequency oscillations in UHVAC/DC power grids and stabilizing measures of them.