智能变电站电子式互感器电磁干扰分析

随着输电电压等级的逐步提高,智能变电站二次侧设备受到干扰的情况日益严峻。现有国家标准并未考虑到互感器采集卡所布置的一次侧恶劣电磁环境。通过不同项目的标准化电磁兼容测试对比,分析了不同测试项目的互感器采集卡典型输出特征,并提出了一种混合干扰测试方法。试验发现了采集卡的传导干扰敏感频点,同时创新性地应用包络来表示互感器采集卡的输出波形,以观测采集卡的受扰程度。该研究对采集卡的现场布置中的电磁环境估计有着重要意义。

Analysis on Electromagnetic Interference of Electronic Transformers in Smart Substation

With the gradual increasing of the transmission voltage level,the interference of the secondary side equipment of smart substations is becoming more serious.Since the existing national standards didn't take the harsh electromagnetic environment of the primary side into account,the transformer acquisition card is arrangetl near the high voltage side.It describes that the standardization electromagnetic compatibility tests of different projects are compared,the typical output characteristics of the transformer acquisition card for different test items are analyzed,and a hybrid interference test method is proposed.The conductive interference sensitive frequency points of the acquisition card are found by test.The innovative application of envelope is used to represent the disturbed degree of acquisition card.The output waveform is to observe the interference level of the acquisition card.This research project has great significance to the electromagnetic environment estimation of the acquisition card.