A smart grid protection system includes a first power protection device and a second power protection device. When a first power consumption and leakage detection module detects that the power consumption of a first power circuit is larger than a first threshold or that the first power circuit has a leakage current, the first power protection device notifies a first power control switch for adjusting an output power of the first power circuit. A first low energy Bluetooth communication module of the first power protection device notifies a second low energy Bluetooth communication module of the second power protection device for correspondingly adjusting the second power control switch of the second power control node.
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