变压器的差动保护因受到铁芯饱和引起的虚假差流的影响，其正确动作率较低，动作速度也较慢。
The differential protection for power transformers features less ratio of proper actuation and slow response, because it severely suffers from false differential current caused by core saturation.
文中分析了各种情况下的CT饱和及短路时的差流波形，提出了基于差流谐波波形特点的判别CT饱和的方案。
On this foundation , put forward a new method to distinguish CT saturation based on the characteristic of differential current harmonic waves.
它对粒度大、水分多、流态化性能差的物料不适用。
It is not suitable for the material of great granularity, big washiness and bad fluidity.
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