JPH0474937B2 - - Google Patents
Info
- Publication number
- JPH0474937B2 JPH0474937B2 JP58103786A JP10378683A JPH0474937B2 JP H0474937 B2 JPH0474937 B2 JP H0474937B2 JP 58103786 A JP58103786 A JP 58103786A JP 10378683 A JP10378683 A JP 10378683A JP H0474937 B2 JPH0474937 B2 JP H0474937B2
- Authority
- JP
- Japan
- Prior art keywords
- partial discharge
- coil
- shield layer
- corona shield
- rotating electric
- 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.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000009413 insulation Methods 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 7
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/40—Structural association with grounding devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は、部分放電の検出を簡便に行うため
の処置を施した高電圧回転電機固定子巻線に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention Pertains] The present invention relates to a stator winding of a high-voltage rotating electric machine that is provided with measures to easily detect partial discharge.
回転電機巻線の絶縁劣化に起因する事故を未然
に防止するには、定期的な絶縁診断試験あるいは
運転中の絶縁劣化モニタリングを行い、その結果
に基づいた適切な処置を講ずることが望ましい。
In order to prevent accidents caused by insulation deterioration of rotating electrical machine windings, it is desirable to perform periodic insulation diagnostic tests or to monitor insulation deterioration during operation, and to take appropriate measures based on the results.
高圧回転電機巻線における典形的な絶縁劣化現
象としては、熱的あるいは機械的ストレスによる
絶縁層のはくりやきれつの発生および増大があげ
られる。したがつて、高圧回転電機巻線の絶縁劣
化現象の検知には、絶縁層中の空隙の状態の検知
を目的とした試験すなわち部分放電試験などが適
用されている。 Typical insulation deterioration phenomena in high-voltage rotating electric machine windings include the occurrence and increase of peeling and cracking of the insulation layer due to thermal or mechanical stress. Therefore, to detect the phenomenon of insulation deterioration in the windings of high-voltage rotating electric machines, tests aimed at detecting the state of voids in the insulation layer, ie, partial discharge tests, etc. are applied.
高圧回転電機巻線の部分放電試験あるいは運転
中の部分放電モニタリングは、通常第１図に示す
ように対象となる回転電機２の巻線端子１ａ〜１
ｃに結合コンデンサ３ａ〜３ｃを夫々接続し部分
放電測定器４により行なわれる。しかし、当然の
ことながらこの方法は結合コンデンサおよびその
設置場所を必要とする欠点がある。 Partial discharge tests on the windings of high-voltage rotating electric machines or partial discharge monitoring during operation are usually carried out at the winding terminals 1a to 1 of the target rotating electric machine 2, as shown in Figure 1.
The partial discharge measuring device 4 connects the coupling capacitors 3a to 3c to the terminals c and performs the measurement using the partial discharge measuring device 4. However, this method naturally has the disadvantage of requiring a coupling capacitor and its installation location.
この発明は、前述の欠点に鑑みなされたもの
で、結合コンデンサを用いずに部分放電が検出で
きる高圧回転電機固定子巻線を提供することを目
的とする。
The present invention was made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a stator winding for a high-voltage rotating electric machine in which partial discharge can be detected without using a coupling capacitor.
この発明は低抵抗コロナシールドを施したコイ
ルからなる高圧回転電機固定子巻線において、こ
の固定子巻線を構成する１つのコイルの前記低抵
抗コロナシールド層を鉄心から電気的に絶縁し、
かつ部分放電検出素子を介して接地しこのコイル
の絶縁層のキヤパシタンス、その他のコイルの絶
縁層のキヤパシタンスおよび前記部分放電検出素
子からなる部分放電検出回路を形成することによ
つて、結合コンデンサを使用せずに運転中の絶縁
監視ができる高圧回転電機固定子巻線を提供する
ものである。
This invention provides a stator winding for a high-voltage rotating electrical machine consisting of a coil provided with a low-resistance corona shield, in which the low-resistance corona shield layer of one coil constituting the stator winding is electrically insulated from an iron core,
A coupling capacitor is used by forming a partial discharge detection circuit consisting of the capacitance of the insulating layer of this coil, the capacitance of the insulating layer of the other coils, and the partial discharge detecting element, which is grounded through the partial discharge detecting element. The present invention provides a stator winding for a high-voltage rotating electrical machine that allows insulation monitoring during operation without any maintenance.
通常、定格電圧6KV以上の回転電機巻線では、
それを構成する全てのコイル６は、第２図に示す
ように鉄心５のスロツトに入る部分の絶縁層７の
表面にスロツトコロナを防止するための低抵抗コ
ロナシールド層８が施され、この低抵抗コロナシ
ールド層８を鉄心５と電気的に接続させるための
導電性ライナー９を鉄心との間に介在させて、ス
ロツト内に納められている。１０は高抵抗コロナ
シールドである。
Normally, for rotating electrical machine windings with a rated voltage of 6KV or higher,
As shown in FIG. 2, all the coils 6 constituting the coils are coated with a low resistance corona shield layer 8 on the surface of the insulating layer 7 at the portion that enters the slot of the iron core 5 to prevent slot corona. A conductive liner 9 for electrically connecting the corona shield layer 8 to the iron core 5 is placed in the slot with a conductive liner 9 interposed between the corona shield layer 8 and the iron core. 10 is a high resistance corona shield.
この発明は、上記のような高圧回転電機の巻線
を構成する１つのコイルについて、導電性ライナ
ー９を絶縁ライナーあるいは高抵抗ライナー１１
に変え、低抵抗コロナシールド層８を抵抗器１４
を介して接地することによつて、そのコイルの絶
縁層のキヤパシタンスを部分放電検出回路の結合
キヤパシタンスとして、また低抵抗コロナシール
ドの接地抵抗器１４を同じく検出回路の検出抵抗
として作用させるようにしたものである。 In the present invention, for one coil constituting the winding of a high-voltage rotating electric machine as described above, the conductive liner 9 is replaced with an insulating liner or a high-resistance liner 11.
, and replace the low resistance corona shield layer 8 with the resistor 14.
By grounding through the coil, the capacitance of the insulating layer of the coil serves as the coupling capacitance of the partial discharge detection circuit, and the grounding resistor 14 of the low resistance corona shield also serves as the detection resistor of the detection circuit. It is something.
第３図はこの発明の実施例を示すもので、回転
電機の巻線のを構成する１つのコイル６を、低抵
抗コロナシールド層８と鉄心５との間に絶縁ライ
ナー１１を介在させてスロツトに納め、低抵抗コ
ロナシールド層８に、接続片１２ａ，１２ｂおよ
びリード線１３を介して抵抗器１４を接続し、抵
抗器１４の一端を接地している。絶縁診断時のみ
ならず運転中も前記抵抗器を介して接地している
ことはいうまでもない。こゝで、絶縁ライナー１
１には、織布、不織布あるいはフイルム状の一般
的な絶縁材料が用いられる。また抵抗器１４によ
る低抵抗コロナシールド層８の接地抵抗値に影響
を及ぼさない抵抗値をもつ高抵抗ライナーを用い
ても良い。抵抗器１４は部分放電測定回路の検出
素子（部分放電検出素子）である抵抗器と低抵抗
コロナシールド層８の接地抵抗器を兼ねるもので
あり、1kΩ前後のものが用いられる。前記検出素
子としては抵抗器の他にリアクトル又はコンデン
サを用いることもできる。接続片１２ａ，１２ｂ
は金属板を用い、低抵抗コロナシールド層８と電
気的に接続されるように紐あるいはテープにより
低抵抗コロナシールド層８の１ケ所あるいは数ケ
所に固着される。 FIG. 3 shows an embodiment of the present invention, in which one coil 6 constituting the winding of a rotating electric machine is slotted with an insulating liner 11 interposed between a low resistance corona shield layer 8 and an iron core 5. A resistor 14 is connected to the low resistance corona shield layer 8 via connection pieces 12a, 12b and a lead wire 13, and one end of the resistor 14 is grounded. Needless to say, it is grounded through the resistor not only during insulation diagnosis but also during operation. Here, insert insulation liner 1
1, a general insulating material in the form of woven fabric, non-woven fabric, or film is used. Further, a high resistance liner having a resistance value that does not affect the ground resistance value of the low resistance corona shield layer 8 due to the resistor 14 may be used. The resistor 14 serves both as a detecting element (partial discharge detecting element) of the partial discharge measuring circuit and as a grounding resistor for the low resistance corona shield layer 8, and is approximately 1 kΩ. As the detection element, a reactor or a capacitor can be used in addition to a resistor. Connection pieces 12a, 12b
A metal plate is used and is fixed to one or several locations of the low resistance corona shield layer 8 with a string or tape so as to be electrically connected to the low resistance corona shield layer 8.
このように巻線を構成する１つのコイルに上記
の処置を施すことによつて、第４図に示すように
そのコイルのキヤパシタンスC1、そのコイルの
低抵抗コロナシールド層の接地抵抗Ｒおよびその
他のコイルのキヤパシタンスC2とからなる部分
放電検出回路が形成され、部分放電測定器４に接
続することにより、巻線で発生する部分放電の検
出測定が可能となる。 By applying the above-mentioned treatment to one coil constituting the winding in this way, the capacitance C 1 of the coil, the grounding resistance R of the low resistance corona shield layer of the coil, and other A partial discharge detection circuit consisting of the capacitance C2 of the coil is formed, and by connecting it to the partial discharge measuring device 4, it becomes possible to detect and measure the partial discharge occurring in the winding.
この発明によれば、回転電機巻線を構成する１
つのコイル６について、低抵抗コロナシールド層
８を鉄心５から電気的に絶縁し、抵抗器１４を介
して接地したので、このコイルの絶縁層のキヤパ
シタンス、その他のコイルの絶縁層のキヤパシタ
ンスおよび上記の抵抗器からなる部分放電検出回
路が形成され、いま運転中に部分放電を発生しな
い低電位にあるコイルに上記の処置を施こすと、
そのコイルのキヤパシタンスが従来技術の項で述
べた結合コンデンサのキヤパシタンスとして作用
し、その他のコイルで発生する部分放電を検出す
ることができる。 According to this invention, 1 constituting the rotating electric machine winding
For one coil 6, the low resistance corona shield layer 8 was electrically insulated from the iron core 5 and grounded via the resistor 14, so the capacitance of the insulating layer of this coil, the capacitance of the insulating layer of the other coils, and the above A partial discharge detection circuit consisting of a resistor is formed, and if the above treatment is applied to the coil that is at a low potential where no partial discharge will occur during operation,
The capacitance of that coil acts as the capacitance of the coupling capacitor described in the prior art section, and partial discharges occurring in other coils can be detected.
また、特定コイルについて測定したい場合に
は、測定しようとするコイルに上記の処置を施す
ことによつて、そのコイルで発生する部分放電
を、その他のコイルで発生する部分放電に対する
よりも高い感度で検出することができる。即ち、
上記の処理を施したコイルで発生する部分放電お
よびその他のコイルで発生する部分放電に対する
測定器入力電圧V1およびV2は、
V1＝ｑ／C1・e-〓t
V2＝ｑ／C2・e-〓t
ｑ；部分放電電荷量
C1；上記の処置を施したコイルのキヤパシタ
ンス
C2；その他のコイル全てのキヤパシタンス
１／α；C1・C2／C1＋C2・Ｒ
ｅ；自然対数の底
従つて、両者の検出感度の比V1／V2は
V1／V2＝C2／C1
また、C1とC2との間にはC1＜＜C2の関係が成
り立つようにすることによつて
V1＞＞V2
となるため、特定のコイルについて測定したい場
合に、そのコイルに上記の処置をしておくことに
よつて、そのコイルで発生する部分放電について
高感度の測定ができる。 In addition, if you want to measure a specific coil, by applying the above measures to the coil you want to measure, you can make the partial discharge generated in that coil more sensitive than the partial discharge generated in other coils. can be detected. That is,
The measuring instrument input voltages V 1 and V 2 for the partial discharge generated in the coil subjected to the above treatment and the partial discharge generated in other coils are V 1 = q/C 1・e - 〓 t V 2 = q/ C 2・e - 〓 t q; Amount of partial discharge charge C 1 ; Capacitance of the coil subjected to the above treatment C 2 ; Capacitance of all other coils 1/α; C 1・C 2 /C 1 +C 2・R e: base of natural logarithm Therefore, the ratio of detection sensitivities between the two, V 1 /V 2, is V 1 /V 2 = C 2 /C 1. Also, between C 1 and C 2 , C 1 << C 2 By making the relationship hold, V 1 >> V 2. Therefore, when you want to measure a specific coil, by applying the above treatment to that coil, you can Partial discharge can be measured with high sensitivity.
この発明は、高圧回転電機固定子巻線の１つの
コイルの低抵抗コロナシールド層を鉄心から電気
的に絶縁し、抵抗器を介して接地することによつ
て、このコイルの絶縁層のキヤパシタンス、その
他のコイルの絶縁層のキヤパシタンスおよび前記
抵抗器からなる部分放電検出回路を形成するよう
にしたので、結合コンデンサを使用せずに回転電
機巻線の運転中の絶縁監視が可能となる効果が得
られる。
This invention reduces the capacitance of the insulating layer of this coil by electrically insulating the low-resistance corona shield layer of one coil of the stator winding of a high-voltage rotating electric machine from the iron core and grounding it through a resistor. Since a partial discharge detection circuit is formed from the capacitance of the insulating layer of the other coils and the resistor, it is possible to monitor the insulation of the rotating electric machine winding during operation without using a coupling capacitor. It will be done.
第１図は従来方式の部分放電検出方法を示す回
路図、第２図は定格電圧6KV以上の回転電機固
定子の部分断面図、第３図はこの発明の実施例に
係わる回転電機固定子の部分断面図、第４図はこ
の発明の実施例に係わる回転電機巻線の部分放電
検出に関する模擬回路図である。
４……部分放電測定器、６……コイル導体、７
……コイル絶縁、８……低抵抗コロナシールド、
１１……絶縁ライナー、１２ａ，１２ｂ……接続
片、１４……抵抗器。
Fig. 1 is a circuit diagram showing a conventional partial discharge detection method, Fig. 2 is a partial sectional view of a stator of a rotating electrical machine with a rated voltage of 6KV or more, and Fig. 3 is a diagram of a stator of a rotating electrical machine according to an embodiment of the present invention. FIG. 4, a partial cross-sectional view, is a simulated circuit diagram relating to partial discharge detection of a rotating electric machine winding according to an embodiment of the present invention. 4... Partial discharge measuring device, 6... Coil conductor, 7
...Coil insulation, 8...Low resistance corona shield,
11... Insulating liner, 12a, 12b... Connection piece, 14... Resistor.
Claims (1)
個を鉄心のスロツト内に夫々挿入して構成される
高電圧回転電機固定子巻線において、この固定子
巻線を構成する１つのコイルの低抵抗コロナシー
ルド層と鉄心とをスロツト内に設けた絶縁ライナ
ーにて電気的に絶縁し、かつスロツト外に位置す
る低抵抗コロナシールド層部を部分放電検出素子
を介して接地させたことを特徴とする高圧回転電
機固定子巻線。1. In a stator winding of a high-voltage rotating electric machine, which is constructed by inserting a plurality of coils each having a low-resistance corona shield layer into a slot in an iron core, the low-resistance corona of one coil constituting the stator winding is A high voltage device characterized in that the shield layer and the iron core are electrically insulated by an insulating liner provided inside the slot, and the low resistance corona shield layer located outside the slot is grounded via a partial discharge detection element. Rotating electric machine stator winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58103786A JPS59230442A (en) | 1983-06-10 | 1983-06-10 | Stator winding for high voltage rotary electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58103786A JPS59230442A (en) | 1983-06-10 | 1983-06-10 | Stator winding for high voltage rotary electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59230442A JPS59230442A (en) | 1984-12-25 |
| JPH0474937B2 true JPH0474937B2 (en) | 1992-11-27 |
Family
ID=14363087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58103786A Granted JPS59230442A (en) | 1983-06-10 | 1983-06-10 | Stator winding for high voltage rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59230442A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1705780A1 (en) * | 2005-03-23 | 2006-09-27 | Siemens Aktiengesellschaft | Stator part, turbogenerator, electrical machine and method for potential free decoupling of noise signals in an electrical machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5469701A (en) * | 1977-11-15 | 1979-06-05 | Hitachi Ltd | Insulation deterioration detecting device for rotary electric machine coil |
-
1983
- 1983-06-10 JP JP58103786A patent/JPS59230442A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5469701A (en) * | 1977-11-15 | 1979-06-05 | Hitachi Ltd | Insulation deterioration detecting device for rotary electric machine coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59230442A (en) | 1984-12-25 |
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