直流输电对电力系统动态稳定性影响分析  

Influence of HVDC on Dynamic Stability of Power System

作　　者：陈厚合[1] 姜涛[2] 李国庆[1] 

机构地区：[1]东北电力大学电气工程学院,吉林132011 [2]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电力系统及其自动化学报》2012年第4期36-42,47,共8页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金项目(50977009)

摘　　要：研究了交直流混合系统中直流输电(HVDC)对系统动态稳定性的影响。在PSS/E仿真系统中搭建含Benchmark A1的交直流混合系统模型;针对HVDC的动态特性与直流控制策略密切相关的特点,以HVDC整流侧定电流-逆变侧定熄弧角为例,构建多机交直流系统的动态模型,并采用根轨迹法设计直流功率调制环节;借助模态分析方法和时域仿真研究直流功率调制对系统动态稳定性的影响。结果表明,合理的直流控制方式和功率调制策略可显著改善系统的动态稳定性。This paper focuses on the influence of HVDC on the dynamic stability of AC/DC hybrid power system. An AC/DC hybrid power system, including the CIGRE benchmark HVDC system, is modeled by using PSS/E. With the rectifier constant current control-inverter constant γ control, the dynamic model of multi-- machine AC/DC hybrid power system is developed. Due to the HVDC dynamic characteristics depending on the control strategy, the root locus is applied to design the HVDC modulation controller. Thus, the eigenvalue analysis and time-domain simulation are proposed to study the influence of HVDC modulation on the dynamic stability of power system. The results show that the appropriate control strategy and HVDC modulation can enhance the dynamic stability of AC/DC hybrid power system.

关 键 词：高压直流输电 功率调制 网络方程 动态方程 动态稳定性 

分 类 号：TM721.1[电气工程—电力系统及自动化]