JP2003107075A - Insulation degradation detecting method and insulation life predicting method - Google Patents
Insulation degradation detecting method and insulation life predicting methodInfo
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- JP2003107075A JP2003107075A JP2001301025A JP2001301025A JP2003107075A JP 2003107075 A JP2003107075 A JP 2003107075A JP 2001301025 A JP2001301025 A JP 2001301025A JP 2001301025 A JP2001301025 A JP 2001301025A JP 2003107075 A JP2003107075 A JP 2003107075A
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- Prior art keywords
- insulating layer
- insulation
- deterioration
- life
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analysing Materials By Optical Means (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えば回転機の
コイル絶縁層等、電気機器の樹脂を含む固体形状の絶縁
層の絶縁劣化検出方法および絶縁寿命予測方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of detecting insulation deterioration and a method of predicting insulation life of a solid insulating layer containing a resin of an electric device such as a coil insulating layer of a rotating machine.
【０００２】[0002]
【従来の技術】回転機等の電気機器に用いられる固体形
状の絶縁層（以下、単に絶縁層と称する）は、様々なス
トレスによってその電気絶縁性能が徐々に劣化すること
が知られている。このため、水車発電機やタービン発電
機などの高電圧、大容量の電気機器の固定子コイル等、
絶縁層を有する機器の補修時期を確定して絶縁層の劣化
による事故を防止する目的で、電気機器の絶縁部分の絶
縁劣化検出および絶縁寿命予測が行われている。2. Description of the Related Art It is known that a solid insulating layer (hereinafter simply referred to as an insulating layer) used in electric equipment such as a rotating machine has its electric insulating performance gradually deteriorated by various stresses. For this reason, high voltage such as turbine generator and turbine generator, stator coil of large capacity electric equipment, etc.
BACKGROUND ART In order to determine the repair time of equipment having an insulation layer and prevent accidents due to deterioration of the insulation layer, insulation deterioration detection and insulation life prediction of insulation parts of electrical equipment are performed.
【０００３】従来の絶縁劣化検出方法としては、例え
ば、電気学会技術報告（II部）第１８２号１３頁〜１４
頁に示された、高電圧回転機のコイルに電圧を印加して
電気的特性の変化から絶縁層の状態を判断する方法や、
絶縁層を構成する有機物の熱による化学的変化から絶縁
層の劣化状態を把握する方法、あるいは、特開平１２−
１５５１５０号公報に開示された、高電圧回転機のコイ
ル絶縁層の劣化に起因する絶縁層表面近傍の放電によっ
て生成される放電劣化生成物を検出する方法等が提案さ
れている。なお、図５は特開平１２−１５５１５０号公
報に開示された高電圧回転機のコイル絶縁層の絶縁劣化
検出方法を説明するための図で、１はコイル導体、２は
コイル絶縁層、３はスロット、４はウェッジ、５はコ
ア、６はスロットライナ、１０は放電劣化生成物を検出
する純水を含ませた水素イオン濃度試験紙、１１は水素
イオン濃度試験紙１０を貼り付ける粘着テープである。As a conventional insulation deterioration detecting method, for example, Technical Report of the Institute of Electrical Engineers of Japan (Part II), No. 182, pp. 13-14.
Method to judge the state of the insulating layer from the change of electrical characteristics by applying a voltage to the coil of the high voltage rotating machine shown on the page,
A method of grasping a deterioration state of an insulating layer from a chemical change due to heat of an organic substance forming the insulating layer, or JP-A-12-
Japanese Patent No. 155150 discloses a method of detecting a discharge deterioration product generated by discharge near the surface of an insulating layer caused by deterioration of a coil insulating layer of a high voltage rotating machine. FIG. 5 is a diagram for explaining a method for detecting insulation deterioration of a coil insulating layer of a high voltage rotating machine disclosed in Japanese Patent Laid-Open No. 12-155150, in which 1 is a coil conductor, 2 is a coil insulating layer, and 3 is Slots, 4 wedges, 5 cores, 6 slot liners, 10 hydrogen ion concentration test paper containing pure water for detecting discharge deterioration products, 11 an adhesive tape to which hydrogen ion concentration test paper 10 is attached is there.
【０００４】[0004]
【発明が解決しようとする課題】以上のように、高電圧
回転機のコイル絶縁層に対して例示された絶縁層の絶縁
劣化を検出する方法としては、従来いくつかの方法が提
案されてきたがいずれも有効ではない。例えば、電気的
特性の変化を測定する方法では、絶縁層の劣化状態を直
接測定するものではないので劣化に対する感度が不十分
であると共に、巻線状態での評価であるため多くの絶縁
層の情報が複合されたものであり精度が低いという問題
があった。また、絶縁層の化学的変化から絶縁層の劣化
を検出する方法では、熱的要因による絶縁層を構成する
有機物の劣化状態の把握に限定されていた。As described above, as a method for detecting the insulation deterioration of the insulating layer exemplified for the coil insulating layer of the high voltage rotating machine, several methods have been conventionally proposed. Is not valid. For example, the method of measuring the change in electrical characteristics does not directly measure the deterioration state of the insulating layer, and thus the sensitivity to deterioration is insufficient. There is a problem that the information is complex and the accuracy is low. Further, the method of detecting the deterioration of the insulating layer from the chemical change of the insulating layer has been limited to the grasp of the deterioration state of the organic substance constituting the insulating layer due to a thermal factor.
【０００５】また、絶縁層表面近傍の放電によって生成
される放電生成物を検出する方法では、コイル絶縁層の
表面近傍に発生したボイドや、コイル・コア間において
放電が発生したのちに検出されるため、絶縁材の劣化が
かなり進行しており、早期に絶縁層の劣化を把握するこ
とが難しいという問題があった。Further, in the method of detecting the discharge product generated by the discharge near the surface of the insulating layer, the discharge product is detected after the void generated near the surface of the coil insulating layer or the discharge between the coil and the core. Therefore, there is a problem that the deterioration of the insulating material is progressing considerably and it is difficult to grasp the deterioration of the insulating layer at an early stage.
【０００６】この発明は、上記のような問題点を解消す
るためになされたもので、電気機器の固体形状の絶縁層
の劣化状態を直接測定し、絶縁層の劣化を早期に検出で
きる絶縁劣化検出方法および絶縁層の劣化による寿命
（余寿命）を早期に予測できる絶縁寿命予測方法を得る
ことを目的とする。The present invention has been made in order to solve the above-mentioned problems, and the deterioration state of the insulating layer can be detected early by directly measuring the deterioration state of the solid insulating layer of the electric device. It is an object of the present invention to provide a detection method and an insulation life prediction method capable of predicting a life (remaining life) due to deterioration of an insulating layer at an early stage.
【０００７】[0007]
【課題を解決するための手段】この発明に係わる絶縁劣
化検出方法は、電気機器の絶縁層中および絶縁層の表面
に付着した、絶縁層を構成する樹脂の加水分解生成物量
を測定することにより、絶縁層の絶縁劣化の状態を検出
するものである。また、絶縁層を構成する樹脂の加水分
解生成物とは、無水マレイン酸、マレイン酸、フマール
酸、無水フタル酸、イソフタル酸、テレフタル酸、アジ
ピン酸などの有機酸のうちのいずれかもしくは複数の有
機酸である。The method for detecting insulation deterioration according to the present invention comprises measuring the amount of hydrolysis products of the resin forming the insulation layer, which is adhered to the surface of the insulation layer of the electric device. The state of insulation deterioration of the insulating layer is detected. Further, the hydrolysis product of the resin forming the insulating layer is any one or more of organic acids such as maleic anhydride, maleic acid, fumaric acid, phthalic anhydride, isophthalic acid, terephthalic acid, and adipic acid. It is an organic acid.
【０００８】また、絶縁層を構成する樹脂の加水分解生
成物量の測定は、サンプリングした絶縁層の溶媒抽出液
をイオンクロマトグラフ分析、もしくはサンプリングし
た上記絶縁層の付着物を赤外線吸収分析法などの有機物
定量分析方法を用いて定量分析することにより行うもの
である。また、絶縁層に含有される絶縁層を構成する樹
脂の加水分解生成物量を測定するためのサンプリング
は、絶縁劣化検出対象である絶縁層と同一仕様を有しか
つ同一環境下にさらされている他の絶縁層から行うもの
である。The amount of the hydrolysis product of the resin constituting the insulating layer is measured by ion chromatography analysis of the sampled solvent extract of the insulating layer, or the sampled deposit of the insulating layer is analyzed by an infrared absorption analysis method or the like. It is carried out by quantitative analysis using the organic substance quantitative analysis method. Further, the sampling for measuring the amount of the hydrolysis product of the resin forming the insulating layer contained in the insulating layer has the same specifications as the insulating layer whose insulation deterioration is to be detected and is exposed to the same environment. It is performed from another insulating layer.
【０００９】さらにこの発明に係わる絶縁寿命予測方法
は、電気機器の絶縁層において、絶縁層の劣化と関連す
る化学的特性値と残存耐電圧値との関係を図式化すると
共に、寿命予測対象である絶縁層に対してその化学的特
性値を測定し、図式に代入して絶縁層の残存耐電圧値を
得ることにより、絶縁層の寿命を予測するものである。
また、絶縁層の劣化と関連する化学的特性値と残存耐電
圧値との関係図式は、絶縁層が施されている電気機器を
任意の時間稼働させた後の、絶縁層の化学的特性値と残
存耐電圧値との複数のデータ対、もしくは任意の条件で
加速劣化させた絶縁層の化学的特性値と残存耐電圧値と
の複数のデータ対を用いて作成されるものである。Further, in the insulation life prediction method according to the present invention, in the insulation layer of the electric equipment, the relationship between the chemical characteristic value related to the deterioration of the insulation layer and the residual withstand voltage value is graphically expressed, and the life prediction target. The life of an insulating layer is predicted by measuring the chemical characteristic value of the insulating layer and substituting it into the diagram to obtain the residual withstand voltage value of the insulating layer.
In addition, the relationship diagram between the chemical characteristic value related to the deterioration of the insulating layer and the residual withstand voltage value is the chemical characteristic value of the insulating layer after operating the electrical equipment provided with the insulating layer for an arbitrary time. And a residual withstand voltage value, or a plurality of data pairs of a chemical characteristic value and a residual withstand voltage value of the insulating layer accelerated and deteriorated under arbitrary conditions.
【００１０】また、絶縁層の劣化と関連する化学的特性
値は、絶縁層に含まれる樹脂の加水分解生成物量であ
る。また、絶縁層の劣化と関連する化学的特性値を測定
するためのサンプリングは、絶縁寿命予測対象である絶
縁層と同一仕様を有しかつ同一環境化にさらされている
他の絶縁層から行うものである。The chemical characteristic value related to the deterioration of the insulating layer is the amount of hydrolysis products of the resin contained in the insulating layer. In addition, sampling to measure the chemical property values related to deterioration of the insulating layer is performed from other insulating layers that have the same specifications as the insulating layer whose insulation life is predicted and that are exposed to the same environment. It is a thing.
【００１１】[0011]
【発明の実施の形態】実施の形態１．以下、この発明の
一実施の形態である電気機器の固体形状の絶縁層（以
下、単に絶縁層と称する）の絶縁劣化検出方法および絶
縁寿命予測方法を図について説明する。図１はこの発明
の実施の形態１による電気機器の絶縁層（本実施の形態
では回転機固定子のコイル絶縁層）の絶縁劣化検出方法
を説明するための図で、回転機固定子の一例を示す部分
斜視図である。図において、１はコイル導体、２はコイ
ル導体１を覆うコイル絶縁層で、樹脂、例えばポリエス
テル樹脂などを含んでいる。３はスロット、４はウェッ
ジ、５はコア、６はスロットライナ、７はコイル絶縁層
２のサンプリング位置の一例である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Hereinafter, a method for detecting insulation deterioration and a method for predicting insulation life of a solid insulating layer (hereinafter simply referred to as an insulating layer) of an electric device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining a method for detecting insulation deterioration of an insulation layer (a coil insulation layer of a rotating machine stator in this embodiment) of an electric device according to a first embodiment of the present invention. An example of a rotating machine stator It is a partial perspective view showing. In the figure, 1 is a coil conductor, and 2 is a coil insulating layer that covers the coil conductor 1, and contains a resin such as polyester resin. 3 is a slot, 4 is a wedge, 5 is a core, 6 is a slot liner, and 7 is an example of a sampling position of the coil insulating layer 2.
【００１２】本実施の形態による絶縁層の絶縁劣化検出
方法は、樹脂を含む絶縁層の化学的な劣化の一つである
樹脂の加水分解に着目し、樹脂の加水分解によって生成
される加水分解生成物を検出すると共に定量することに
より絶縁層の劣化を検出する方法である。The method for detecting the insulation deterioration of the insulating layer according to the present embodiment focuses on the hydrolysis of the resin, which is one of the chemical deterioration of the insulating layer containing the resin, and the hydrolysis generated by the hydrolysis of the resin. It is a method of detecting deterioration of the insulating layer by detecting and quantifying the product.
【００１３】次に、本実施の形態による絶縁層の絶縁劣
化検出方法について具体的に説明する。本実施の形態で
は、回転機固定子のコイル絶縁層を例示して説明する。
まず、回転機の固定子コイルのコイル絶縁層２の一部、
望ましくはコイル絶縁層２の表層近傍から約１ｇを採取
して正確にその重量を測定し、導電率１μＳ／ｃｍのイ
オン交換水５０ｃｃに浸漬して、約３０分間超音波抽出
を行った後、イオンクロマト分析法等により樹脂の加水
分解生成物である無水マレイン酸、マレイン酸、フマー
ル酸、無水フタル酸、イソフタル酸、テレフタル酸、ア
ジピン酸などの有機酸のうちのいずれか、もしくは複数
の有機酸の検出および定量を行う。このとき、コイル絶
縁層２の抽出液には複数の成分が含まれるが、樹脂の加
水分解生成物は絶縁層に劣化が生じていない場合にはほ
とんど検出されないことから、加水分解生成物の生成状
態をコイル絶縁層２の劣化の判定指標とすることができ
る。Next, the method for detecting the insulation deterioration of the insulating layer according to the present embodiment will be specifically described. In the present embodiment, the coil insulating layer of the rotating machine stator will be described as an example.
First, a part of the coil insulating layer 2 of the stator coil of the rotating machine,
Desirably, about 1 g is sampled from the vicinity of the surface layer of the coil insulating layer 2, its weight is accurately measured, and it is immersed in 50 cc of ion-exchanged water having a conductivity of 1 μS / cm, and ultrasonic extraction is performed for about 30 minutes. Any one or more of organic acids such as maleic anhydride, maleic acid, fumaric acid, phthalic anhydride, isophthalic acid, terephthalic acid, and adipic acid, which are hydrolysis products of the resin by ion chromatography analysis method, or the like. Detect and quantify acid. At this time, although the extract of the coil insulating layer 2 contains a plurality of components, the hydrolysis product of the resin is hardly detected unless the insulating layer is deteriorated. The state can be used as a determination index for deterioration of the coil insulating layer 2.
【００１４】図２はコイル絶縁層２の抽出液に含まれる
樹脂の加水分解生成物の量による絶縁層の劣化状態の判
定基準の一例を示したもので、劣化状態の判定基準とな
る加水分解生成物量の数値は、予め予備実験を行うこと
によって定めたものである。なお、有機酸量の測定は、
コイル絶縁層２の抽出液中に含まれる有機酸量（樹脂の
加水分解生成物量）を測定するイオンクロマト分析に限
定するものではなく、コイル絶縁層２の表面付着物中に
含まれる有機酸量（樹脂の加水分解生成物量）を測定す
る赤外吸収分析等、有機酸を検出できる定量分析方法で
あればよい。FIG. 2 shows an example of criteria for determining the state of deterioration of the insulating layer depending on the amount of the hydrolysis product of the resin contained in the extract of the coil insulating layer 2. The numerical value of the amount of product is determined by conducting a preliminary experiment in advance. In addition, the measurement of the amount of organic acid,
The amount of organic acid contained in the surface deposit of the coil insulating layer 2 is not limited to the ion chromatographic analysis for measuring the amount of organic acid contained in the extract of the coil insulating layer 2 (the amount of the hydrolysis product of the resin). Any quantitative analysis method capable of detecting an organic acid such as infrared absorption analysis for measuring (amount of hydrolysis product of resin) may be used.
【００１５】本実施の形態によれば、樹脂を含む絶縁層
の化学的な劣化の一つとして考えられる樹脂の加水分解
に着目し、絶縁層を構成する樹脂の加水分解生成物は絶
縁層に劣化が生じていない場合にはほとんど検出されな
いことから、絶縁層を直接サンプリングして分析し、絶
縁層を構成する樹脂の加水分解生成物である特定の有機
酸のみを測定することにより、絶縁層の劣化状態を直接
測定して判定することができると共に、絶縁層を構成す
る樹脂の加水分解生成物の量をモニタすることにより絶
縁層の劣化を早期に検出することができる。According to the present embodiment, attention is paid to the hydrolysis of the resin, which is considered as one of the chemical deterioration of the insulating layer containing the resin, and the hydrolysis product of the resin forming the insulating layer is formed in the insulating layer. Since almost no detection occurs when deterioration has not occurred, the insulating layer is directly sampled and analyzed, and only the specific organic acid that is the hydrolysis product of the resin that constitutes the insulating layer is measured, and The deterioration state can be determined by directly measuring the deterioration state, and the deterioration of the insulating layer can be detected early by monitoring the amount of the hydrolysis product of the resin forming the insulating layer.
【００１６】実施の形態２．図３はこの発明の実施の形
態２による電気機器の絶縁層（本実施の形態では回転機
固定子のコイル絶縁層）の絶縁寿命予測方法を説明する
ための図の一例で、絶縁寿命予測対象の絶縁層（コイル
絶縁層）の有機酸量（絶縁層を構成する樹脂の加水分解
生成物量）と残存耐電圧値の関係を示す図の一例であ
る。Embodiment 2. FIG. 3 is an example of a diagram for explaining a method of predicting the insulation life of an insulation layer of an electric device (in this embodiment, a coil insulation layer of a rotating machine stator) according to Embodiment 2 of the present invention. FIG. 4 is an example of a diagram showing the relationship between the amount of organic acid in the insulating layer (coil insulating layer) (the amount of hydrolysis product of the resin forming the insulating layer) and the residual withstand voltage value.
【００１７】次に、本実施の形態による絶縁層の絶縁寿
命予測方法について説明する。まず、任意の時間運転し
た回転機のコイル絶縁層に対して測定した、絶縁層の劣
化と関連する化学的特性値の一つであるコイル絶縁層を
構成する樹脂の加水分解生成物量（有機酸量）と残存耐
電圧値とから、コイル絶縁層の有機酸量と残存耐電圧値
の関係を図式化する（図３）。次に、寿命予測対象のコ
イル絶縁層において得られた有機酸量を図３に当てはめ
ることにより、このコイル絶縁層の残存耐電圧値を推定
する。なお、コイル絶縁層の有機酸量と残存耐電圧値の
関係図を得るために任意の時間運転した回転機のコイル
絶縁層を用いたが、任意の条件で加速劣化させた回転機
のコイル絶縁層を用いて作成してもよい。Next, a method of predicting the insulation life of the insulating layer according to this embodiment will be described. First, the amount of hydrolysis products of the resin that constitutes the coil insulation layer (organic acid), which is one of the chemical characteristic values related to the deterioration of the insulation layer, measured on the coil insulation layer of the rotating machine operated for an arbitrary time. Amount) and the residual withstand voltage value, the relationship between the amount of organic acid in the coil insulating layer and the residual withstand voltage value is illustrated (FIG. 3). Next, the residual withstand voltage value of this coil insulating layer is estimated by applying the amount of the organic acid obtained in the coil insulating layer of the life prediction target to FIG. The coil insulation layer of the rotating machine that was operated for an arbitrary time was used to obtain the relationship diagram between the amount of organic acid in the coil insulation layer and the residual withstand voltage value. It may be created using layers.
【００１８】本実施の形態によれば、予め作成された絶
縁層を構成する樹脂の加水分解生成物量（有機酸量）と
絶縁層の残存耐電圧値の関係を示す図式に、寿命予測対
象の絶縁層における絶縁層を構成する樹脂の加水分解生
成物量の測定値を当てはめることにより、絶縁層の推定
残存耐電圧値を得ることができ、この絶縁層の寿命（余
寿命）を早期かつ容易に予測することができる。According to the present embodiment, the relationship between the hydrolysis product amount (organic acid amount) of the resin forming the insulating layer and the residual withstand voltage value of the insulating layer, which has been prepared in advance, is shown in The estimated residual withstand voltage value of the insulating layer can be obtained by applying the measured value of the hydrolysis product of the resin forming the insulating layer in the insulating layer, and the life (remaining life) of this insulating layer can be quickly and easily achieved. Can be predicted.
【００１９】実施の形態３．図４はこの発明の実施の形
態３による電気機器の絶縁層（本実施の形態では回転機
固定子のコイル絶縁層）の絶縁寿命予測方法を説明する
ための図である。図において、５は回転機固定子のコ
ア、８はコイルエンド部、９はコイル口出し線（機外
部）、９ａはコイル口出し線９に施された絶縁層であ
る。Embodiment 3. FIG. 4 is a diagram for explaining a method of predicting the insulation life of the insulating layer (the coil insulating layer of the rotor stator in the present embodiment) of the electric device according to the third embodiment of the present invention. In the figure, 5 is a core of a rotating machine stator, 8 is a coil end portion, 9 is a coil lead wire (outside the machine), and 9a is an insulating layer applied to the coil lead wire 9.
【００２０】本実施の形態によるコイル絶縁層の絶縁寿
命予測方法は、絶縁層中の樹脂の加水分解による劣化は
環境からの要因によって生じる劣化であり、熱、電気、
機械等に起因する劣化とは異なりコイル絶縁層にのみ生
じるものではないことから、絶縁寿命予測対象のコイル
絶縁層と同一仕様を有しかつ同一環境化にさらされた他
の絶縁層に対して測定した絶縁層を構成する樹脂の加水
分解生成物量を、実施の形態２と同様の方法で得られた
絶縁層を構成する樹脂の加水分解生成物量（有機酸量）
と残存耐電圧値との関係図式に代入することにより、コ
イル絶縁層における残存耐電圧値を推定して寿命（余寿
命）を予測するものである。In the method for predicting the insulation life of the coil insulation layer according to the present embodiment, deterioration due to hydrolysis of the resin in the insulation layer is caused by environmental factors.
Unlike the deterioration caused by machinery, etc., it does not occur only in the coil insulation layer.Therefore, for other insulation layers that have the same specifications and are exposed to the same environment as the coil insulation layer whose insulation life is predicted The measured hydrolysis product amount of the resin constituting the insulating layer is obtained by the same method as in Embodiment 2 and the hydrolysis product amount of the resin constituting the insulating layer (the amount of organic acid).
The residual withstand voltage value in the coil insulating layer is estimated and the life (remaining life) is predicted by substituting it into the relational diagram of the residual withstand voltage value.
【００２１】ここでは、絶縁寿命予測対象であるコイル
絶縁層の代わりに、コイル口出し線９機外部に施された
絶縁層９ａに対して絶縁層９ａを構成する樹脂の加水分
解生成物量を測定し、コイル絶縁層を構成する樹脂の加
水分解生成物量とコイル絶縁層の残存耐電圧値との関係
図式に代入することにより、コイル絶縁層の残存耐電圧
値を推定して寿命（余寿命）を予測する。Here, instead of the coil insulation layer, which is the target of the insulation life prediction, the amount of hydrolysis products of the resin forming the insulation layer 9a is measured with respect to the insulation layer 9a provided outside the coil lead wire 9 machine. , The relationship between the amount of hydrolysis products of the resin that constitutes the coil insulation layer and the residual withstand voltage value of the coil insulation layer is substituted into the diagram to estimate the remaining withstand voltage value of the coil insulation layer to determine the life (remaining life). Predict.
【００２２】また、寿命予測対象の絶縁層を有する電気
機器の一部に施された絶縁層ではなく、寿命予測対象の
絶縁層と同一仕様を有する絶縁層からなる測定用サンプ
ルを寿命予測対象の絶縁層の近傍に設置し、測定用サン
プルを用いて樹脂の加水分解生成物量を測定することに
より、寿命予測対象の絶縁層の残存耐電圧値を推定して
寿命（余寿命）を予測してもよい。In addition, instead of an insulating layer applied to a part of an electric device having an insulating layer whose life is to be predicted, a measurement sample which is an insulating layer having the same specifications as the insulating layer whose life is to be predicted is used as the life predicting target. It is installed near the insulation layer and the amount of the hydrolysis product of the resin is measured using the measurement sample to estimate the residual withstand voltage value of the insulation layer whose life is to be predicted and to predict the life (remaining life). Good.
【００２３】本実施の形態によれば、予め作成された絶
縁層を構成する樹脂の加水分解生成物量（有機酸量）と
絶縁層の残存耐電圧値の関係図式に、寿命予測対象の絶
縁層と同一仕様でかつ近傍に設置された絶縁層に対して
測定した絶縁層を構成する樹脂の加水分解生成物量を代
入し、寿命予測対象の絶縁層における寿命（余寿命）を
予測するため、実機からの絶縁層形成部の抜き取りや、
絶縁層のサンプリングおよびサンプリングに伴う補修の
必要がなくなり、サンプリング作業が容易かつ迅速に行
うことができる。According to the present embodiment, the insulating layer whose life is to be predicted is shown in the relational diagram of the amount of the hydrolysis product (organic acid amount) of the resin forming the insulating layer and the residual withstand voltage value of the insulating layer, which is prepared in advance. In order to predict the life (remaining life) of the insulation layer whose life is to be predicted by substituting the amount of the hydrolysis product of the resin that forms the insulation layer measured for the insulation layer that has the same specifications as the above and is installed in the vicinity, Of the insulating layer forming part from the
The need for sampling the insulating layer and the repair associated with the sampling is eliminated, and the sampling work can be performed easily and quickly.
【００２４】なお、実施の形態３では、コイル絶縁層の
寿命予測のためのサンプリングについて示したが、実施
の形態１におけるコイル絶縁層の絶縁劣化検出のための
サンプリングに適用してもよく、サンプリング作業にお
いて同様の効果が得られる。また、上記実施の形態で
は、回転機固定子のコイル絶縁層の劣化検出および寿命
予測について説明したが、本発明は樹脂を含む絶縁層に
対して適用でき、同様の効果が得られる。In the third embodiment, the sampling for predicting the life of the coil insulating layer has been described, but it may be applied to the sampling for detecting the insulation deterioration of the coil insulating layer in the first embodiment. The same effect can be obtained in the work. Further, in the above-described embodiment, the detection of deterioration of the coil insulating layer of the rotating machine stator and the prediction of the life are described, but the present invention can be applied to an insulating layer containing a resin, and the same effect can be obtained.
【００２５】[0025]
【発明の効果】以上のように、この発明による絶縁劣化
検出方法によれば、樹脂を含む固体形状の絶縁層の化学
的な劣化の一つとして考えられる樹脂の加水分解に着目
し、絶縁層を構成する樹脂の加水分解生成物は絶縁層に
劣化が生じていない場合にはほとんど検出されないこと
から、絶縁層をサンプリングして分析することにより、
絶縁層の劣化状態を直接測定して判定することができる
と共に、絶縁層を構成する樹脂の加水分解生成物の量を
モニタすることにより、絶縁層の劣化を早期に検出する
ことができる。As described above, according to the insulation deterioration detecting method of the present invention, attention is paid to hydrolysis of the resin, which is considered as one of the chemical deterioration of the solid insulating layer containing the resin. Since the hydrolysis product of the resin that constitutes is hardly detected when the insulation layer is not degraded, by sampling and analyzing the insulation layer,
The deterioration state of the insulating layer can be directly measured and determined, and the deterioration of the insulating layer can be detected early by monitoring the amount of the hydrolysis product of the resin forming the insulating layer.
【００２６】また、絶縁層を構成する樹脂の加水分解生
成物である特定の有機酸のみを分析して定量するため、
絶縁層を構成する樹脂の加水分解生成物量の測定を容易
に行うことができる。Further, in order to analyze and quantify only a specific organic acid which is a hydrolysis product of the resin constituting the insulating layer,
The amount of hydrolysis products of the resin forming the insulating layer can be easily measured.
【００２７】また、絶縁層を構成する樹脂の加水分解生
成物量の測定は、一般的な分析機器を用いて周知の手法
により行うことができる。The amount of the hydrolysis product of the resin forming the insulating layer can be measured by a known method using a general analytical instrument.
【００２８】また、絶縁層を構成する樹脂の加水分解生
成物量を測定するためのサンプリングを、絶縁劣化検出
対象である絶縁層と同一仕様を有しかつ同一環境化にさ
らされている他の絶縁層から行うことにより、実機から
の絶縁層形成部の抜き取りや、サンプリング後の補修の
必要がなくなり、サンプリング作業が容易かつ迅速に行
うことができる。Further, the sampling for measuring the amount of the hydrolysis product of the resin forming the insulating layer has the same specifications as the insulating layer whose insulation deterioration is to be detected, and is exposed to the same environment. By performing from the layer, it is not necessary to extract the insulating layer forming portion from the actual machine and repair after sampling, and the sampling operation can be performed easily and quickly.
【００２９】また、この発明による絶縁寿命予測方法に
よれば、予め、電気機器の固体形状の絶縁層において、
絶縁層の劣化と関連する化学的特性値と残存耐電圧値と
の関係を図式化し、寿命予測対象である絶縁層に対して
その化学的特性値を測定して上記の関係図式に代入する
ことにより、絶縁層の推定残存耐電圧値を容易に得るこ
とができ、この絶縁層の寿命（余寿命）を早期かつ容易
に予測することができる。Further, according to the insulation life prediction method of the present invention, in advance, in the solid-shaped insulation layer of an electric device,
Figure out the relationship between the chemical property value related to the deterioration of the insulating layer and the residual withstand voltage value, measure the chemical property value of the insulating layer whose life is to be predicted, and substitute it in the above relationship diagram. Thus, the estimated residual withstand voltage value of the insulating layer can be easily obtained, and the life (remaining life) of this insulating layer can be predicted early and easily.
【００３０】また、絶縁層の劣化と関連する化学的特性
値と残存耐電圧値との関係図式は、任意の時間稼働後の
絶縁層の化学的特性値と残存耐電圧値との複数のデータ
対から容易に作成することができる。Further, the relationship diagram between the chemical characteristic value related to the deterioration of the insulating layer and the residual withstand voltage value is represented by a plurality of data of the chemical characteristic value and the residual withstand voltage value of the insulating layer after operating for an arbitrary time. Can be easily created from pairs.
【００３１】さらに、絶縁層の劣化と関連する化学的特
性値と残存耐電圧値との関係図式を、任意の条件で加速
劣化させた絶縁層の化学的特性値と残存耐電圧値との複
数のデータ対を用いて作成することにより、短時間で上
記図式を作成することができる。Further, the relational diagram between the chemical characteristic value related to the deterioration of the insulating layer and the residual withstand voltage value is shown as a plurality of the chemical characteristic value and the residual withstand voltage value of the insulating layer accelerated and deteriorated under arbitrary conditions. By creating using the data pair of, the above-mentioned scheme can be created in a short time.
【００３２】また、絶縁層の劣化と関連する化学的特性
値として、測定が容易である絶縁層に含まれる樹脂の加
水分解生成物量を用いることにより、絶縁層の寿命（余
寿命）の予測が容易となる。Further, by using the amount of the hydrolysis product of the resin contained in the insulating layer, which is easy to measure, as the chemical characteristic value related to the deterioration of the insulating layer, the life of the insulating layer (remaining life) can be predicted. It will be easy.
【００３３】また、絶縁層の劣化と関連する化学的特性
値を測定するためのサンプリングを、絶縁寿命予測対象
である絶縁層と同一仕様を有しかつ同一環境化にさらさ
れている他の絶縁層から行うことにより、実機からの絶
縁層形成部の抜き取りや、サンプリング後の補修の必要
がなくなり、サンプリング作業が容易かつ迅速に行うこ
とができる。Further, the sampling for measuring the chemical property value related to the deterioration of the insulating layer has the same specifications as the insulating layer whose insulation life is to be predicted and is exposed to the same environment. By performing from the layer, it is not necessary to extract the insulating layer forming portion from the actual machine and repair after sampling, and the sampling operation can be performed easily and quickly.
【図１】 この発明の実施の形態１による電気機器の絶
縁層の絶縁劣化検出方法を説明するための図である。FIG. 1 is a diagram for explaining a method for detecting insulation deterioration of an insulation layer of an electric device according to a first embodiment of the present invention.
【図２】 この発明の実施の形態１による電気機器の絶
縁層の絶縁劣化検出方法において、絶縁層の劣化状態の
判定基準の一例を示す図である。FIG. 2 is a diagram showing an example of a criterion for determining a deterioration state of an insulating layer in the method for detecting insulation deterioration of an insulating layer of an electric device according to the first embodiment of the present invention.
【図３】 この発明の実施の形態２による電気機器の絶
縁層の絶縁寿命予測方法を説明するための図である。FIG. 3 is a diagram for explaining a method of predicting insulation life of an insulation layer of an electric device according to a second embodiment of the present invention.
【図４】 この発明の実施の形態３による電気機器の絶
縁層の絶縁寿命予測方法の一例を説明するための図であ
る。FIG. 4 is a diagram for explaining an example of a method of predicting insulation life of an insulation layer of an electric device according to a third embodiment of the present invention.
【図５】 従来のこの種電気機器の絶縁層の絶縁劣化検
出方法を説明するための図である。FIG. 5 is a diagram for explaining a conventional method for detecting insulation deterioration of an insulating layer of an electric device of this type.
１ コイル導体、２ コイル絶縁層、３ スロット、４
ウェッジ、５ コア、６ スロットライナ、７ サン
プリング位置、８ コイルエンド部、９ コイル口出し
線、９ａ 絶縁層。1 coil conductor, 2 coil insulation layer, 3 slots, 4
Wedge, 5 cores, 6 slot liner, 7 sampling position, 8 coil end part, 9 coil lead wire, 9a insulating layer.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０１Ｒ 31/12 Ｇ０１Ｒ 31/12 Ｚ 31/34 31/34 Ｚ Ｈ０１Ｆ 41/00 Ｈ０１Ｆ 41/00 Ｄ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) G01R 31/12 G01R 31/12 Z 31/34 31/34 Z H01F 41/00 H01F 41/00 D
Claims (9)
表面に付着した、上記絶縁層を構成する樹脂の加水分解
生成物量を測定することにより、上記絶縁層の絶縁劣化
の状態を検出することを特徴とする絶縁劣化検出方法。1. A state of insulation deterioration of the insulating layer is detected by measuring an amount of a hydrolysis product of a resin forming the insulating layer, which is attached to an insulating layer of an electric device and on a surface of the insulating layer. An insulation deterioration detecting method characterized by the above.
成物とは、無水マレイン酸、マレイン酸、フマール酸、
無水フタル酸、イソフタル酸、テレフタル酸、アジピン
酸など有機酸のうちのいずれかもしくは複数の有機酸で
あることを特徴とする請求項１記載の絶縁劣化検出方
法。2. The hydrolysis product of the resin constituting the insulating layer includes maleic anhydride, maleic acid, fumaric acid,
The insulation deterioration detecting method according to claim 1, wherein the insulation deterioration detecting method is any one or a plurality of organic acids such as phthalic anhydride, isophthalic acid, terephthalic acid, and adipic acid.
成物量の測定は、サンプリングした上記絶縁層の溶媒抽
出液をイオンクロマト分析法、もしくはサンプリングし
た上記絶縁層の付着物を赤外線吸収分析法などの有機物
定量分析方法を用いて定量分析することにより行うこと
を特徴とする請求項２記載の絶縁劣化検出方法。3. The amount of the hydrolysis product of the resin constituting the insulating layer is measured by an ion chromatographic analysis method of the sampled solvent extract of the insulating layer or an infrared absorption analysis method of the sampled deposits of the insulating layer. The insulation deterioration detecting method according to claim 2, wherein the insulation deterioration detecting method is performed by performing a quantitative analysis using an organic substance quantitative analysis method such as.
成物量を測定するためのサンプリングは、絶縁劣化検出
対象である絶縁層と同一仕様を有しかつ同一環境下にさ
らされている他の絶縁層から行うことを特徴とする請求
項１〜３のいずれか一項記載の絶縁劣化検出方法。4. Sampling for measuring the amount of hydrolysis products of the resin forming the insulating layer has the same specifications as the insulating layer which is the target of insulation deterioration detection and is exposed to the same environment. The method for detecting insulation deterioration according to claim 1, wherein the method is performed from an insulating layer.
の劣化と関連する化学的特性値と残存耐電圧値との関係
を図式化すると共に、寿命予測対象である絶縁層に対し
てその化学的特性値を測定し、上記図式に代入して上記
絶縁層の残存耐電圧値を得ることにより、上記絶縁層の
寿命を予測することを特徴とする絶縁寿命予測方法。5. In an insulating layer of an electric device, a relationship between a chemical characteristic value related to deterioration of the insulating layer and a residual withstand voltage value is diagrammed, and the chemical property of the insulating layer which is a life prediction target is measured. Life value of the insulating layer is predicted by measuring the characteristic value of the characteristic and substituting it into the above formula to obtain the residual withstand voltage value of the insulating layer.
値と残存耐電圧値との関係図式は、絶縁層が施されてい
る電気機器を任意の時間稼働させた後の、上記絶縁層の
上記化学的特性値と残存耐電圧値との複数のデータ対を
用いて作成されることを特徴とする請求項５記載の絶縁
寿命予測方法。6. The relationship diagram between the chemical property value related to deterioration of the insulating layer and the residual withstand voltage value is the insulating layer after the electric device provided with the insulating layer is operated for an arbitrary time. 6. The insulation life prediction method according to claim 5, wherein the insulation life prediction method is created by using a plurality of data pairs of the chemical characteristic value and the residual withstand voltage value.
値と残存耐電圧値との関係図式は、任意の条件で加速劣
化させた絶縁層の上記化学的特性値と残存耐電圧値との
複数のデータ対を用いて作成されることを特徴とする請
求項５記載の絶縁寿命予測方法。7. The relationship diagram between the chemical characteristic value related to the deterioration of the insulating layer and the residual withstand voltage value is defined by the chemical characteristic value and the residual withstand voltage value of the insulating layer accelerated and deteriorated under arbitrary conditions. The insulation life prediction method according to claim 5, wherein the insulation life prediction method is created by using a plurality of data pairs.
値は、上記絶縁層に含まれる樹脂の加水分解生成物量で
あることを特徴とする請求項５〜７のいずれか一項記載
の絶縁寿命予測方法。8. The chemical property value related to the deterioration of the insulating layer is the amount of a hydrolysis product of a resin contained in the insulating layer. Insulation life prediction method.
値を測定するためのサンプリングは、絶縁寿命予測対象
である絶縁層と同一仕様を有しかつ同一環境化にさらさ
れている他の絶縁層から行うことを特徴とする請求項５
〜９のいずれか一項記載の絶縁寿命予測方法。9. The sampling for measuring the chemical property value related to the deterioration of the insulating layer has the same specifications as the insulating layer whose insulation life is to be predicted and is exposed to the same environment. 6. The process is performed from an insulating layer.
10. The method for predicting insulation life according to any one of 9 to 10.
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| JP2010243225A (en) * | 2009-04-02 | 2010-10-28 | Meidensha Corp | Method for diagnosing deterioration of insulating material |
| JP2010243224A (en) * | 2009-04-02 | 2010-10-28 | Meidensha Corp | Method for diagnosing deterioration of heat-resistant polyester varnish |
| CN113015917A (en) * | 2018-11-20 | 2021-06-22 | 三菱电机株式会社 | Method for diagnosing remaining life of rotating electrical machine and apparatus for diagnosing remaining life of rotating electrical machine |
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| CN104793111B (en) * | 2015-03-31 | 2017-11-07 | 华南理工大学 | Based on reason, change, the insulated cable residual life comprehensive estimation methods of electrical characteristics |
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|---|---|---|---|---|
| JP2010243225A (en) * | 2009-04-02 | 2010-10-28 | Meidensha Corp | Method for diagnosing deterioration of insulating material |
| JP2010243224A (en) * | 2009-04-02 | 2010-10-28 | Meidensha Corp | Method for diagnosing deterioration of heat-resistant polyester varnish |
| CN113015917A (en) * | 2018-11-20 | 2021-06-22 | 三菱电机株式会社 | Method for diagnosing remaining life of rotating electrical machine and apparatus for diagnosing remaining life of rotating electrical machine |
| CN113015917B (en) * | 2018-11-20 | 2024-04-16 | 三菱电机株式会社 | Method and device for diagnosing remaining life of rotating electrical machine |
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