提升微机保护装置的电磁兼容性能
Research on the EMC of Microprocessor-based Protection
摘要 分析了电磁干扰的形式及其对微机保护各模块的影响,通过对模拟量输入、开关量输入及通讯等敏感回路采用变压器隔离、光电隔离、TVS 保护,对MCU 模块进行合理的布局,对电源增加改进的滤波器等措施,对微机保护的各模块增加相应的抗干扰电路。实验证明,这些措施提高了微机保护装置整体的电磁兼容性能。
关键词 微机保护;电磁兼容;抗干扰
Abstract The forms of electromagnetic interference and their influence on each of
modules in microprocessor-based protector were analyzed. The measures were
adopted to enhance the performance of the protector by adding isolation transformer
photoelectric isolator, TVS protection on the input ports of analog, switching and
communication circuit. Meanwhile, the layout of MCU on the PCB was designed
reasonably and the filter was installed on the power supply. The experimental result
proved that these measures were capable of improving the overall microprocessor
-based protector’s electromagnetic compatibility.
Keywords microprocessor-based protection;EMC;anti-interference
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