TCSC次同步频率阻抗特性及其抑制SSR的参数设计  

Subsynchronous Frequency Impedance Characteristics of TCSC and Its Parameter Design for Mitigating SSR

作　　者：康海燕[1] 王西田[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电力系统及其自动化学报》2008年第5期91-96,共6页Proceedings of the CSU-EPSA

摘　　要：正确分析TCSC次同步频率阻抗特性是研究TCSC抑制次同步谐振(SSR)能力以及进行TCSC参数设计的重要基础。基于对TCSC次同步频率阻抗模型的研究,绘制了三维频率阻抗图,分析了TCSC次同步频率阻抗特性,特别提出了次同步谐振导通角的概念。基于内蒙古上都电厂串补输电线路模型,在满足工频基波阻抗调节特性的前提下,根据次同步频率阻抗特性研究了考虑TCSC自然抑制SSR时其主电路参数的设计原则。通过对上述系统各模态频率阻抗特性的综合分析,讨论了TCSC控制参数的选择方法。仿真结果证实了次同步频率阻抗特性分析结果的正确性。The correct analysis of subsynchronous frequency impedance characteristics of Thyristor Controlled Series Capacitor （TCSC） is acknowledged as being essential to evaluate the ability for mitigating subsynchronous resonance （SSR） and to select parameters for TCSC. In this paper, a three-dimensional diagram of subsynchronous frequency impedance characteristics is obtained based on the research of the subsynchronous frequency impedance model. And this paper analyzes subsynchronous frequency impedance characteristics on the basis of above three-dimensional diagram, especially a conception of subsynchronous resonance conduction angle is presented. On the precondition of meeting the modulatory characteristics of the fundamental impedance, the power transmission systems with series compensation in Shangdu power plant is used to discuss the parameter design rule of main circuit of TCSC in the light of inherent mitigating SSR. With the integration analysis of frequency impedance characteristics of above system on each mode, the selection method of controllable parameters of TCSC is discussed. The simulation results are given to verify the correctness of the analytical method.

关 键 词：可控串联补偿电容 次同步谐振 次同步频率阻抗特性 次同步谐振导通角 

分 类 号：TM761[电气工程—电力系统及自动化]