CAJ | 학술논문

为解决气体绝缘变电站有源电子式电压互感器在开关操作时因受到快速暂态过电压的影响而导致采集卡损坏的问题，提出一种新型的电子式电压互感器抑阻措施。通过建立电路模型，推导出作用于电子式互感器采集卡上的快速过电压幅值，提出通过增加电子式互感器外壳接地以降低外壳过电压；在电子式互感器一次、二次引出端增加电感元件；同时要求电子式互感器采集卡与一次设备外壳空间距离大于快速暂态过电压的空气击穿距离等措施。该方法可有效避免电子式互感器采集卡损坏的问题，提升电子式互感器抗干扰能力。
위해결기체절연변전참유원전자식전압호감기재개관조작시인수도쾌속잠태과전압적영향이도치채집잡손배적문제，제출일충신형적전자식전압호감기억조조시。통과건립전로모형，추도출작용우전자식호감기채집잡상적쾌속과전압폭치，제출통과증가전자식호감기외각접지이강저외각과전압；재전자식호감기일차、이차인출단증가전감원건；동시요구전자식호감기채집잡여일차설비외각공간거리대우쾌속잠태과전압적공기격천거리등조시。해방법가유효피면전자식호감기채집잡손배적문제，제승전자식호감기항간우능력。
Affected by the very fast transients overvoltage( VFTO) , the acquisition card of active electronic voltage transformer in the gas insulated substation ( GIS) might be damaged while the circuit breaker is being operated. In order to solve this problem, a new impedance suppressing method for the electronic voltage transformer has been proposed in this paper. Through the circuit analysis, we deduced the amplitude of very fast transient overvoltage for the electronic acquisition card, and then proposed a few improvement ap-proaches, e.g., lowering the enclosure overvoltage of electronic transformer by the enclosure ground, installing the inductance com-ponents at the primary and secondary coil terminals of electronic transformer, and guaranteeing that the distance between the electronic acquisition card and the primary device is longer than the air breakdown threshold. The proposed method can effectively avoid the damage of acquisition card in the electronic transformer, and enhance its anti-interference ability.