高压直流输电系统次同步振荡的几种研究方法及其对比分析

HVDC SYSTEM SUBSYNCHEONOUS RESONANCE SEVERAL RESEARCHING METHOD AND CAMPARING ANALYSIS

本文讨论了高压直流输电系统的次同步振荡,考虑了包括各个子系统相联关系的数学模型。并应用特征值阻尼比法。扫频分析法和扭矩仿真计算法作全面论证,探讨了主要参变量对该谐振的影响,再对三种方法对比分析作出结论。分析表明:三种方法各有特点,宜于配合应用取得完善效果。

This paper analysises the problem of subsynchronous oscillatin of power system which is a synchrohoas generator driven by a steam turbine to feed power to infinite bus through a DC system with detailed 33-order state space equations model. Our discussion of this paper centres on the influence of the main parameter Variations with the method of Eigenvalue Damping and curve of electriaall damping in frequency and shaft torsional torque computer simulation. Some conclusions have been made by the apper method. The resalt shows that each method has its own character and the best effectiveness can be obtained by using then in the same time.