在电路原理图设计中遵循高速信号电路PCB设计原则，完成了系统PCB的布局、叠层设计、内电层设计、系统接地设计和高速信号线等设计；

With the circuit schematic design and the high speed PCB design, completes PCB composition, stackup design, internal layer design, system grounding design and high-speed signal line design.

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从系统布局、接地、印板设计、滤波和屏蔽等方面对如何进行的EMC设计进行了详细地讨论。

It is discussed in detail about how to design for EMC methods such as system partitionings groundings PCB designings filtering as well as screening.

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因此，如何在多年冻土地区进行变电站接地系统的设计，是设计中一项很关键的工作。

So, how to proceed with the design work of the substation grounding system in permafrost region is a key step in the whole design work.

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