The invention relates to the technical field of power distribution
network monitoring, in particular to a power distribution cabinet line intelligent detection method and
system, and the method comprises the steps: collecting node
voltage,
phasor current and active / reactive power of each power distribution cabinet, attaching a sampling period and a quality identifier, and carrying out the arrangement according to a
timestamp; carrying out edge calculation on
harmonic waves,
flicker, unbalance, missing measurement compensation and initial
estimation, and generating a straight-through UDP
stream and a storage
stream; a real-time interface is aligned and fused with a topology version according to a unified time reference, state
estimation is carried out, and a node initial
value set is output; s4, according to the initial value and topological modeling node digital twinning (index
recovery load), obtaining online parameters through four-stage sub-step discrete + UKF joint
estimation; accessing a real-time
simulation platform through HiL, and recharging in the same period; a variable damping impedance stable interface is adopted, and when consistency and a threshold value are met, a digital snapshot containing an online parameter, a steady-state quantity and a transient abstract is generated. According to the method, low time
delay of measurement alignment, credible state estimation, digital twinborn self-adaption, hardware-in-
loop stability and verifiable result release can be realized, so that the fault detection, positioning and evaluation capabilities of the power distribution network are improved.