【摘要】 特高压变电站二次设备运行所处电磁环境恶劣,提高其抗干扰性对电网的安全、可靠运行具有重要意义。对二次设备端口电路建立等效模型,利用HSPICE电路仿真工具模拟限幅、滤波、隔离等提高设备抗扰度措施,并研究这些措施实施的有效性,为设计者提供了电路设计依据。对于敏感电路,通过网络分析仪测量设备二端口网络的S参数,采用向量拟合有理函数逼近的方法建立与之等效的宽频电路模型,为时域仿真提供依据。对该设备进行电磁兼容抗扰度测试,分析比较这些措施实施前后的时域波形,同样得出采取限幅、滤波等措施的有效性,在时域上验证了建模方法的正确性。更多还原

【Abstract】 It is important for power network’s safe and reliable operation to improve the immunity of secondary equipment of ultra high-voltage substation running in badly electromagnetic environment.The model is set up based on equivalent circuit for the secondary equipment port,using HSPICE to simulate limiting,filtering,isolation devices,and so on.It can improve the effectiveness of equipment immunity measures and provide reference for the circuit designers. F or sensitive circuit,the network analyzer is used to measure S-parameters of two-port network,and rational approximation of frequency domain responses by vector fitting is adopted to build broad frequency equivalent circuit for time domain. By testing the equipment electromagnetic compatibility,analysing and comparing time-domain waveforms,i t draws to conclusion that measures such as limiter,filter,and so on are effective and the correctness of the modeling method in time domain is verified.更多还原