摘要
越来越多的柔性交流输电系统(FACTS)装置应用于电网,成为可能的次同步振荡激发源,严重的次同步振荡将直接导致大型汽轮发电机组转子轴系的严重破坏,危及电力系统的安全运行。为了有效抑制次同步振荡,文中设计了基于测量阻抗提升系数(本地测量信号)的可控串联补偿(TCSC)控制次同步振荡方法,并通过建立包含火电机组的TCSC系统仿真模型,对该方法的有效性进行了验证。由仿真结果可知,与采用转速偏差信号的附加控制方式相比,所提出的控制方法具有同样的抑制效果,并且简单、容易实现,更有利于电网应用。
The devices of flexible AC transmission system（FACTS） are applied in power systems increasingly.This may result in subsynchronous oscillations.Intensive oscillation will lead to serious damage on generator rotor shaft,which poses a high risk on power system security.Supplementary impedance control method of thyristor controlled series compensation（TCSC）,which is based on local measured impedance lifting coefficients,is used to damp subsynchronous oscillations.The effectiveness of this method is verified by a simulation example,which includes thermal power units in power system with TCSC.The simulation results show that this method is as effective as the method based on the angular speed deviation.As it is simple and easy to be realized,the method is suitable for engineering application in power system.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第23期22-25,共4页
Automation of Electric Power Systems
基金
国家电网公司科技项目"次同步振荡/次同步谐振机理及抑制措施深化研究"~~
关键词
可控串联补偿
次同步振荡
附加阻尼控制
柔性交流输电系统
thyristor controlled series compensation（TCSC）
subsynchronous oscillation
supplementary damping control
flexible AC transmission system（FACTS）
