The invention relates to the technical field of
fault analysis, in particular to a
power grid fault intelligent diagnosis and analysis
system which comprises a fault
signal detection module, a propagation path analysis module, a fault positioning calculation module, a fault type analysis module and a fault
influence analysis module. According to the invention, by monitoring the
voltage transient data of the plurality of nodes of the
power grid in real time, the instantaneous offset and the
time sequence difference of the
voltage can be accurately calculated, so that the
voltage mutation exceeding the preset threshold value can be quickly identified in the continuous time window, the early identification of the
power grid fault is quicker, the risk of
false alarm is reduced, and the accuracy of the early identification is improved. By analyzing the propagation path and speed of the sudden change quantity along the power grid, the fault positioning precision is improved, rapid and accurate fault
source tracing is realized, and by careful analysis of the current waveform of a fault point and combination of real-time
tripping current data, the fault type can be identified more accurately, the
fault handling strategy can be optimized, and the
fault handling efficiency is improved. And the power
grid fault processing efficiency and safety are improved.