TCSC对发电机组次同步谐振阻尼特性影响研究  

Study of SSR Damping on a Generator Connected to TCSC

作　　者：张帆[1] 徐政[1] 

机构地区：[1]浙江大学电机系,杭州310027

出　　处：《高电压技术》2005年第3期68-70,共3页High Voltage Engineering

基　　金：国家自然科学基金资助项目(50277034)

摘　　要：采用基于时域仿真实现的复转矩系数法—测试信号法研究了含有可控串补(TCSC)的电力系统中的次同步谐振(SSR)阻尼特性。采用 IEEE SSR第一标准测试系统模型,将其中部分固定串补电容改造为 TCSC。TCSC采用3种闭环控制方式如恒电流、恒功率及阻尼功率振荡控制。通过频率扫描计算出发电机组在次同步频率范围内的电气阻尼特性曲线,分别研究了开环控制和3 种不同闭环控制方式下 TCSC导通角对电气阻尼特性的影响。结果表明,不论在何种控制方式下,相对于固定电容串补,TCSC都能大大减小谐振点附近的电气负阻尼;TCSC的导通角对阻尼特性有很大影响,TCSC运行在较大导通角时可有效减小谐振点附近的电气负阻尼。The complex torque coefficient approach realized by time domain simulation (the Test Signal Method) is adopted in this paper to study the SSR damping characteristics with TCSC. The study system is modified from the first IEEE SSR benchmark model by changing a part of the fixed series capacitor to TCSC. Three different control methodologies are checked, namely: constant current, constant power, and power oscillation damping control. The control models and their principles are also described. Frequency scanning in the subsynchronous frequency range is performed to calculate the subsynchronous electrical damping characteristics of the unit. Impacts of the thyristor conducting angles of the TCSC on the electrical damping are studied, and results are analyzed in detail. The results show that TCSC greatly reduces the electrical negative damping around the resonant point, for the three studied control methodologies, compared with the fixed capacitor compensation. It also shows that the conducting angle of the thyristor has a great influence on the damping of the TCSC, when the conducting angle is larger, the TCSC will reduces the electrical negative damping around the resonant point more.

关 键 词：可控串补(TCSC) 次同步谐振(SSR) 测试信号法 时域 

分 类 号：TM31[电气工程—电机]