直流试验线段用阻波器的参数优化设计

Parameter Optimization Design of Wave Trap Filter for DC Test Line

阻波器安装在试验线段和高压试验电源之间,可隔断来自高压试验电源的谐波干扰,同时阻止试验线段上的电晕电流流入电源侧,对准确测量直流试验线段的无线电干扰具有重要作用。首先,基于EMTP软件,建立了阻波器和试验线段的仿真计算模型,研究了阻波器各参数取值变化对电晕电流衰减效果的影响,推荐采用阻波器参数设计方案。接着基于ANSYS Maxwell仿真软件,对阻波器均压罩表面的电场强度进行了校核,保证了阻波器在试验电压下不发生电晕。最后,将研制的阻波器安装于试验线段上。通过现场实测,无线电干扰频谱特性规律得到明显改善,验证了阻波器设计方案的合理性。该研究为电磁环境试验研究提供了参考。

The wave trap filter is installed between the test line and the high-voltage test power supply,which can cut off the harmonic interference from the high-voltage test power supply and prevent the corona current on the test line from flowing into the power supply side.It plays an important role in accurately measuring the radio interference of the DC test line.Firstly,based on EMTP software,the simulation calculation model of the wave trap filter and the test line was established.The influence of the parameters value change on the attenuation effect of corona current was studied,and the design scheme of the parameters of the wave trap filter was recommended.Secondly,based on the ANSYS Maxwell simulation software,the surface electric field strength of corona rings of wave trap filter was calculated and checked,which ensured that corona did not occur under the test voltage.Finally,the wave trap filter was installed on the test line,through the measurement,the characteristics of radio interference spectrum are obviously improved,which verifies the rationality of the design scheme of the wave trap filter and provides reference for electromagnetic environment test and research.