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智能电子设备(IED)的变电站就地化成为一个趋势,随之出现IED在EMC方面的新课题。分析了就地化的IED与传统模式的IED在快速瞬变、浪涌两种常规干扰方式下的差异,介绍了一种新的干扰形式(VFTO)给就地化IED带来的影响,并提出了建议的解决措施:采用“共模扼流圈+滤波电容器”的方式以抑制高频干扰;采用放电管与压敏电阻串联的方式解决信号回路的浪涌能量泄放;在接地方面提出了建议方案。
Localization of substations in IEDs has become a trend with the emergence of new topics for EMC in the IED. The differences between localized IED and conventional IED in fast transient and surge are analyzed. The impact of a new form of interference (VFTO) on localized IED is introduced. Proposed solutions: the use of “common mode choke + filter capacitor ” way to suppress high frequency interference; using discharge tube and varistor in series to solve the signal circuit surge energy release; in the ground Proposed the proposed program.