LINE PROTECTION METHOD FOR FLEXIBLE GROUNDING SYSTEM OF POWER DISTRIBUTION NETWORK, AND RELATED DEVICE

Disclosed in embodiments of the present invention are a line protection method for a flexible grounding system of a power distribution network, and a related device. The method comprises: under the condition that a grounding fault occurs in a target power distribution network, a voltage source of a flexible grounding apparatus of each line of the target power distribution network outputs a first compensation voltage; a zero-sequence impedance protection apparatus starts to calculate zero-sequence impedance of each line in real time; after the first compensation voltage is output for a first output duration, the voltage source of the flexible grounding apparatus adjusts an output voltage to output a second compensation voltage; the line zero-sequence impedance protection apparatus calculates the zero-sequence impedance of each line in real time; and the zero-sequence impedance protection apparatus determines, according to the zero-sequence impedance, a fault line satisfying a zero-sequence impedance protection