PARTIAL DISCHARGE DETECTION DEVICE AND DETECTION METHOD OF DYNAMO-ELECTRIC MACHINE

Japanese Patent JP2022175660

A

To improve detection sensitivity of a partial discharge signal of a dynamo-electric machine by a noncontact method.SOLUTION: A partial discharge detection device of a dynamo-electric machine includes: a metal frame connected to a stator frame for housing a stator coil of the dynamo-electric machine; a signal line that is provided in the metal frame and propagates a partial discharge signal generated from the stator coil when insulation of the stator coil deteriorates; an electric element provided in a position in which the partial discharge signal can be detected; an antenna that has directivity in a direction of the signal line and is provided in a position in which signals can be received; and determination means for determining whether the stator coil deteriorates by comparing a signal detected by the electric element with a signal received by the antenna.SELECTED DRAWING: Figure 1

JPH08503297	INDUSTRIAL APPLICABILITY: A method and an apparatus for measuring a partial discharge in a cable.
JPS60100061	APPARATUS FOR MEASURING PARTIAL DISCHARGE GENERATING POSITION OF CABLE
WO/2001/018554	PARTIAL DISCHARGE MONITORING SYSTEM FOR TRANSFORMERS

SAWA FUMIO
HIROSHIMA SATOSHI
TAKANEZAWA MAKOTO
KOBAYASHI YUSUKE
NEMOTO KOSUKE

JP2021082275A

November 25, 2022

May 14, 2021

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TOSHIBA CORP
TOSHIBA ENERGY SYSTEM & SOLUTION CORP

G01R31/12; G01R31/34; H02P29/024

Masatoshi Kurata
Nobuhisa Nogawa
Ryuji Mine
Naoki Kono
Sanae Kaneko

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