The construction of smart grid of China includes six segments which are power generation, transmission, transformation, distribution, utilization and dispatching, substation is one of the important parts belong to the transformation segment.. At present, the substation based on IEC61850 standard in China is called digital substation, new requirements are proposed by the construction of smart grid in China, and the combination resulted in the generation of smart substation. The smart substation is the use of advanced, reliable, integrated, lowcarbon, environmentally friendly intelligent devices. Digital of all station information, network of communication platform and standardization of sharing information are the basic requirements to realize the automation of data acquisition, measurement, control, protection, metering, monitoring and other basic functions. The smart substation also supports the real-time automatic control, standardization, analytical decision-making online, collaborative interaction and other advanced functions.
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