Sampling value differential protection can be adopted as main protection for motor when it works in frequency-conversion mode.
同时，针对变频运行时电动机主保护缺失问题，提出采用采样值差动保护作为变频电动机主保护的解决方案。
Sampling value differential protection can guard against TA saturation by selecting appropriate value of S, and it has a well application value in engineering.
通过适当地选择S值，采样值差动保护对电流互感器（TA）饱和的影响具有一定的抵御能力，在工程实际中具有良好的应用前景。
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