华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (10): 67-72.

• 动力与电气工程 • 上一篇    下一篇

交直流输电系统的模式分析和直流阻尼控制

林玉章 蔡泽祥 朱浩骏   

  1. 华南理工大学 电力学院,广东 广州 510640
  • 收稿日期:2005-07-15 出版日期:2006-10-25 发布日期:2006-10-25
  • 通信作者: 林玉章(1980-),男,博士生,主要从事电力系统稳定分析与控制研究 E-mail:linyuzhang001@163.com
  • 作者简介:林玉章(1980-),男,博士生,主要从事电力系统稳定分析与控制研究
  • 基金资助:

    国家自然科学基金资助项目(50337010)

M odal Analysis and DC Damping Control of AC/DC Power System

Lin Yu-zhang  Cai Ze-xiang  Zhu Hao-jun   

  1. School of Electric Power,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-07-15 Online:2006-10-25 Published:2006-10-25
  • Contact: 林玉章(1980-),男,博士生,主要从事电力系统稳定分析与控制研究 E-mail:linyuzhang001@163.com
  • About author:林玉章(1980-),男,博士生,主要从事电力系统稳定分析与控制研究
  • Supported by:

    国家自然科学基金资助项目(50337010)

摘要: 给出了一个含3条直流线路的交直流输电系统以用于直流阻尼控制的研究,采用特征值分析法和暂态仿真分析了该系统的特性.该系统具有结构复杂、振荡模式多的特点,这些特点广泛地存在于实际的交直流输电系统,在设计直流阻尼控制器时必须予以考虑.文中基于该系统设计了多个直流阻尼控制器.根轨迹分析表明,直流线路两端的频率差在相位补偿设计方面比交流联络线的有功功率变化量具有更多的优点,因而被选为直流阻尼控制器的输入信号.暂态仿真结果表明所设计的直流阻尼控制器有效地增加了系统的阻尼.

关键词: 输电系统, 模式分析, 暂态仿真, 直流阻尼控制

Abstract:

An AC/DC power system with three DC links is presented for the investigation of DC damping control.The presented system is of complicated grid structure and multiple oscillatory modes,which extensively exist in practical AC/DC power systems and must be given enough consideration in DC damping controller design. By means of the modal analysis and the transient simulation.the performances of the system are then analyzed.Moreo-ver,multiple DC damping controllers are designed based on the proposed power transmission system.The analysis of root lOCUS shows that the frequency differences across DC links are superior to the active power deviations on AC tie lines in the phase compensation design,so that they can be selected as the input signals into DC damping con-trollers.Furtherm ore,the results of transient simulation demonstrate that the designed DC damping controllers effectively improve the damping of the power transmission system.

Key words: power system, modal analysis, transient simulation, DC damping control