JP6231767B2 - 回転電気機器の絶縁診断方法 - Google Patents
回転電気機器の絶縁診断方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 16
- 238000003745 diagnosis Methods 0.000 title claims description 10
- 238000009413 insulation Methods 0.000 title description 20
- 230000015556 catabolic process Effects 0.000 claims description 30
- 230000006866 deterioration Effects 0.000 claims description 24
- 238000011088 calibration curve Methods 0.000 claims description 22
- 230000005484 gravity Effects 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000006731 degradation reaction Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 8
- 230000001066 destructive effect Effects 0.000 claims description 8
- 238000002405 diagnostic procedure Methods 0.000 claims description 8
- 230000020169 heat generation Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000002845 discoloration Methods 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 description 12
- 238000011156 evaluation Methods 0.000 description 9
- 238000004804 winding Methods 0.000 description 8
- 208000016261 weight loss Diseases 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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Description
(1)巻き線のスロット部の吸湿、空隙等を劣化現象との相関関係による電気的非破壊試験により把握する方法では、直接絶縁材料の熱劣化現象を把握できない。
(2) 巻き線を機械的に固定、支持する絶縁材料の劣化度を把握できない。
(3) IEC.pub.216による耐熱性評価方法は存在するが、この方法では破壊試験、重量減少の試験項目となるため実機の巻き線には直接適用できない。このため、回転機の巻線交換等を大幅な修復をせずに、そのまま再使用が可能な試験方法の開発が望まれている。
式1 ρ=Wa/(Wa-Ww)×(ρ0-d)+d
比重=ρ/ρw
ρ0:水(23℃)の密度
d:空気の密度
ρw:水(4℃)の密度
Claims (4)
- 電気機器絶縁材料の熱劣化度を診断するものであって、
回転電気機器の固定子コイルの周辺部材の加熱温度毎の加熱時間と比重の検量線(以下、第一検量線という)を作成し、
前記周辺部材を採取して周辺部材の比重を求め、
前記回転電気機器の運転時間を前記加熱時間として、求めた前記周辺部材の比重と前記第一検量線を照合して、前記回転電気機器の運転時に前記周辺部材に加わった温度(以下、周辺部材の運転温度という)を推定し、
推定した前記周辺部材の運転温度、前記固定子コイルの絶縁層の発熱量、並びに、前記周辺部材及び前記絶縁層の熱伝導率及び厚みに基づき熱伝達に従った計算で前記回転電気機器の運転時における前記固定子コイルの絶縁層の温度(以下、コイル絶縁層の運転温度という)を推定することを特徴とするコイル絶縁層の非破壊劣化診断方法。 - 請求項1に記載のコイル絶縁層の非破壊劣化診断方法において、
前記周辺部材の採取は、前記周辺部材の最も変色の激しい部分を採取することを特徴とするコイル絶縁層の非破壊劣化診断方法。 - 請求項1または2に記載のコイル絶縁層の非破壊劣化診断方法において、
前記周辺部材がウエッジ材又はライナ材であることを特徴とするコイル絶縁層の非破壊劣化診断方法。 - 請求項1乃至3の何れか一項に記載のコイル絶縁層の非破壊劣化診断方法において、
前記固定子コイルの運転温度毎の運転時間と破壊電圧(BDV)残存率の検量線(以下、第二検量線という)を作成し、
前記コイル絶縁層の運転温度を前記固定子コイルの運転温度として、推定した前記コイル絶縁層の運転温度と前記第二検量線を照合して、前記固定子コイルの破壊電圧(BDV)残存率を推定することを特徴とするコイル絶縁層の非破壊劣化診断方法。
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS58118926A (ja) * | 1982-01-07 | 1983-07-15 | Mitsubishi Electric Corp | 電気機器の運転温度履歴推定方法 |
JPH0795739A (ja) * | 1993-09-22 | 1995-04-07 | Fuji Electric Co Ltd | 固定子巻線の振動火花放電防止構造 |
JPH07128394A (ja) * | 1993-11-01 | 1995-05-19 | Hitachi Ltd | 電気機器の絶縁劣化監視診断システム |
JP2000002744A (ja) * | 1998-06-12 | 2000-01-07 | Toyo Electric Mfg Co Ltd | 回転機のコイル絶縁診断方法及びその装置 |
AU2010362124B2 (en) * | 2010-10-07 | 2014-03-20 | Abb Schweiz Ag | Detection of a missing stator slot wedge in an electrical machine |
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