A METHOD AND APPARATUS FOR LOCATING A DISTURBANCE IN AN ELECTRICAL GRID

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EP 2 988 140 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A2)

(48)	Corrigendum issued on:
	13.04.2016 Bulletin 2016/15

(43)	Date of publication:
	24.02.2016 Bulletin 2016/08

(21)	Application number: 15396005.9

(22)	Date of filing: 19.08.2015

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International Patent Classification (IPC):

G01R 31/08^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME
	Designated Validation States:
	MA

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Priority:

19.08.2014 FI 20140226

(71)	Applicants:
	Eltel Networks Oy 02600 Espoo (FI) Domax Oy 02300 Espoo (FI)

(72)	Inventors:
	Maksniemi, Matti 02300 Espoo (FI) Raatikainen, Janne 02770 Espoo (FI)

(74)	Representative: Pirhonen, Kari Lennart
	Patenttitoimisto Kari Pirhonen Oy P.O. Box 71 20101 Turku 20101 Turku (FI)

(54)	A METHOD AND APPARATUS FOR LOCATING A DISTURBANCE IN AN ELECTRICAL GRID

(57) A method and apparatus for anticipating and/or locating a disturbance or fault in a power line in a three-phase electrical grid such that several measurement points are placed at some distance from one another along the power line, the measurement points including a remote detector intended for each phase conductor at a distance from the phase conductor. Using the remote detectors, the strength of each phase conductor's voltage field is measured separately at the measurement point, and a fault in the power line is anticipated and/or located by means of a change in the strength of the voltage and/or voltage field of the conductor.