限流式SSSC提高DFIG型风火打捆系统暂态稳定分析  

Analysis of Improving Transient Stability of DFIG-type Wind-thermal Binding System by Current-limiting SSSC

作　　者：李娟[1] 李方媛 王鹏[1] 李浩宁 陈美霖 LI Juan;LI Fangyuan;WANG Peng;LI Haoning;CHEN Meilin(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学电气工程学院,吉林132012

出　　处：《电力系统及其自动化学报》2021年第5期68-76,共9页Proceedings of the CSU-EPSA

摘　　要：为降低风电并入对风火打捆系统暂态稳定的不利影响,提出将电阻型限流式静止同步串联补偿器SSSC(static synchronous series compensator)串联到风火打捆系统的联络线上,以提高风火打捆系统的暂态稳定性。通过借助双馈风电机组DFIG(doubly-fed induction generator)等值外特性参数来构造风火打捆系统暂态稳定数学模型,建立相应功率特性方程。在分析电阻型限流式SSSC工作原理的基础上,建立不同运行状态下含电阻型限流式SSSC的风火打捆系统功率特性方程,并借助功角特性曲线对系统进行暂态稳定的机理研究,最后进行仿真验证。结果表明,限流式SSSC有效地提高了风火打捆系统的暂态稳定性。To reduce the adverse effect of wind power connection on the transient stability of a wind-thermal binding system,it is suggested that a resistance-type current-limiting static synchronous series compensator(SSSC)should be series-connected to the tie line of the wind-thermal binding system,thus improving the system’s transient stability.A mathematical model for the wind-thermal binding system’s transient stability is constructed by using the equivalent external characteristic parameters of a doubly-fed induction generator(DFIG),and the corresponding power characteristic equation is established.Based on the analysis of the working principle of the resistance-type current-limiting SSSC,the power characteristic equation of the wind-thermal binding system containing the resistance-type current-limiting SSSC under different operating conditions is established.In addition,with the help of power angle characteristic curve,the study on the mechanism of the system’s transient stability is carried out,which is verified by simulations at last.Results show that the current-limiting SSSC effectively improves the transient stability of the wind-thermal binding system.

关 键 词：风火打捆系统 风电等值 限流式静止同步串联补偿器 暂态稳定性 

分 类 号：TM732[电气工程—电力系统及自动化]