Method for positioning short-circuit fault area of grid-connected mode alternating-current micro-grid

Method for positioning short-circuit fault area of grid-connected mode alternating-current micro-grid

The invention provides a grid-connected mode alternating-current micro-grid short-circuit fault area positioning method, which is used for performing area positioning on grid-connected mode alternating-current micro-grid short-circuit faults under different capacities, and comprises an approximate m...

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Hauptverfasser: GAN HONGHAO, ZHENG XIN
Format: Patent
Sprache:chi ; eng
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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creator GAN HONGHAO
ZHENG XIN
description The invention provides a grid-connected mode alternating-current micro-grid short-circuit fault area positioning method, which is used for performing area positioning on grid-connected mode alternating-current micro-grid short-circuit faults under different capacities, and comprises an approximate model establishment method and a fault area positioning method, a rapid calculation model for positioning a short-circuit fault area is constructed through an OLS-RBF neural network algorithm, and when a current wavelet energy spectrum value measured at a micro-grid detection point is greater than a fault detection threshold value, it is judged that a short-circuit fault occurs on a feeder line. The size of the first peak value of the fault current wavelet energy spectrum waveform, the micro-grid capacity at the moment and the detected fault initial phase angle are substituted into a fault area positioning formula corresponding to the fault type to calculate the distance from the short circuit point to the detection
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subjects CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
title Method for positioning short-circuit fault area of grid-connected mode alternating-current micro-grid
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