换流站中换流阀的周期性导通和关断过程会产生宽频量等二次系统产生传导电磁骚扰。采用基于时域宽频等值电路的仿真计算方法，对换流站稳态运行过程、传导骚扰产生和传播过程统一进行仿真分析，充分考虑工作状态、器件特性对传导骚扰特性的影响。提出了关键设备的宽频等值电路模型，用宏模型模拟骚扰源特性，所有模型均同时考虑了设备的工频和高频特性，采用与设备规范和标准试验相配合的参数提取方法，适用于系统级全波电磁分析。通过现场试验验证了该方法的正确性，并定量评估了贵广II回±500kV换流站换流回路的电磁骚扰水平。

The wide-band frequency electromagnetic noise is generated by periodical turn-on and turn-off processes of thyristor valves in converter stations. It will be conducted along the primary circuit, and may interfere with secondary systems such as power line carrier (PLC) systems, measuring systems and so on. A simulation method to analyze the conducted electromagnetic disturbance (EMD) based on time-domain wide-band equivalent circuits was proposed in the paper. The steady-state electromagnetic process and EMD were calculated together. Influences of operating states and device characteristics on EMD generation and propagation, can be easily considered. Models of mayor equipments such as converters, converter transformers, smoothing reactors, were described. The EMD source from valves was simulated by a macro-model, and other devices were represented by wide-band equivalent models considering working frequency and high frequency characteristics. Parameters of these models can be derived from significations and test results provided by manufacturers. The method was verified by field test results in a ±500 kV converter station, and the EMD levels of a ±500 kV transmission project called Guizhou-Guangzhou II were calculated by the method.

“十一五”国家科技支撑计划重大项目(2006BAA-02A21)。