Analysis method for closing contact resistance of circuit breaker and related device

The invention discloses a circuit breaker closing contact resistance test analysis method, which comprises the following steps: when a power system fault occurs in a circuit breaker in a closing state, recording fault voltage and fault current waveforms through a fault recorder, and decomposing through a mathematical model algorithm to obtain direct current components in the fault voltage and fault current; and calculating the closing contact resistance of the circuit breaker by adopting an Ohm law, comparing the closing contact resistance value with a closing contact resistance value specified by a standard to obtain an analysis result of the closing contact resistance of the circuit breaker, and generating an analysis report. Compared with the prior art, the power supply continuity can be ensured, and whether the closing contact resistance of the circuit breaker meets the requirement or not can be automatically and intelligently analyzed. The labor and power failure cost is greatly saved, the pre-test effic