直流换流阀晶闸管热阻抗端口特性分析与建模  

Study on External Characteristics and Modelling for Thermal Impedance of Thyrisor in HVDC Converter Valve

作　　者：杨俊 查鲲鹏 高冲 王高勇 汤广福 

机构地区：[1]国网智能电网研究院,北京市昌平区102200

出　　处：《中国电机工程学报》2016年第1期196-204,共9页Proceedings of the CSEE

基　　金：国家高技术研究发展计划(863计划)(2012AA052701)~~

摘　　要：阐述了Foster网络和Cauer网络模型在热传导计算应用中的物理意义,证明了Cauer网络级联有效性。基于晶闸管热传导方程,分析了晶闸管内部各层元件热传导二端口网络特性,得到各自热阻抗的复频域及时域理论表达式,形成对应的傅里叶级数Foster网络及其恒等变换后的低阶Foster和Cauer网络。结合实际晶闸管结构及热物理参数,将所述模型及其恒等模型的单位阶跃响应与有限元计算结果以及datasheet提供的曲线进行对比,验证了由热传导方程诱导的网络模型及其恒等变换过程的有效性。为直流输电换流阀晶闸管热特性设计及电热耦合计算提供了一种实用的电磁暂态等效计算模型。The physical significance of Foster and Cauer network model was elaborated in application of heat transfer calculations, and the validity of cascaded Cauer network was proven. Then two-port network characteristics for the internal layers of components was analyzed based on thyristor heat conduction equations, and the theoretical expressions of the transient thermal impedance were derived respectively in complex frequency domain and time domain, yielding corresponding Foster network in the form of Fourier series and its low-level form of Foster and Cauer network by identical transformation. Using an actual thyristor＇s structure and thermophysical parameters, the unit step response of the obtained model and its identical ones was compared with the calculation results by finite element method and the standard curve from product datasheet, and the effectiveness of the network model induced by heat conduction equation and its identical transformation process was qualified, providing a practical equivalent EMTP network model for thermal design and electrothermal modeling in simulation for HVDC converter valve thyristor.

关 键 词：直流换流阀晶闸管 Foster网络 Cauer网络 级联 恒等变换 

分 类 号：TM46[电气工程—电器]