JP2021508955A - 非液浸変圧器の絶縁 - Google Patents
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
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- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
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- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
- H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases
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- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Insulating Of Coils (AREA)
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Abstract
Description
本開示は、変圧器に関し、より具体的には、非液浸型変圧器、例えば乾式変圧器の電気絶縁に関する。
周知のように、変圧器は、ある電圧レベルの電気を、別の電圧レベル、例えばより高い電圧またはより低い電圧の電気に変換する。変圧器は、第1のコイルおよび第2のコイルを用いて、電圧の変換を達成する。第1のコイルおよび第2のコイルは各々、強磁性コアの周りに巻かれ、複数の巻数の導電体を含む。第1のコイルは、電圧源に接続され、第2のコイルは、負荷に接続される。二次コイルの巻数に対する一次コイルの巻数の比(「巻数比」)は、負荷の電圧に対する電源の電圧の比と同じである。
CN206961661は、ワイヤセグメントを巻いた後、鋳込することによって得られた円形管状構造を採用した乾式自動変圧器を開示している。
乾式変圧器のコイル内の固体絶縁物の老化度を評価するための非侵襲的な方法およびシステムが開示される。方法は、浮遊電極、すなわち、コイルの導電性素子と接触しない電極を介して、変圧器の少なくとも熱誘電臨界領域(すなわち、コイルの両極端)におけるターン間および/またはターン群(例えば、ディスクおよび層)内に導入された固体絶縁物の電気特性(例えば、周波数スペクトルにおける複素誘電率)の測定に関する。
いくつかの例において、固体絶縁物は、ポリエステルフィルム、エポキシ樹脂、またはNomex(登録商標)などのメタアラミド材料のうちの1つであってもよい。
図1Aは、一実施例に係る非液浸変圧器を示す概略図である。変圧器50は、コア15の周りに巻かれた巻線を有する高圧コイル5と低圧コイル10とを備えてもよい。高圧コイル5は、ディスク7を含むディスクフォイル型コイルであってもよい。低電圧コイル10は、フォイル12を含むフォイル型コイルであってもよい。
Claims (15)
- 非液浸変圧器であって、
コアと、
前記コアの周りに巻かれた導電性巻線を有するコイルと、
前記コイル内の固体絶縁物と、
前記固体絶縁物内の1つ以上の浮遊電極とを含み、
前記導電性巻線の少なくとも一部と前記1つ以上の浮遊電極とは、各々1つ以上の容量性素子を形成し、
前記変圧器は、前記1つ以上の浮遊電極に接続された端子と前記導電性巻線の前記一部に接続された端子との間に接続された静電容量測定装置を含む、非液浸漬変圧器。 - 前記固体絶縁物内に分散して配置された複数の浮遊電極を含み、
各浮遊電極と前記導電性巻線の異なる部分とは、容量性素子を形成する、請求項1に記載の非液浸漬変圧器。 - 前記導電性巻線は、フォイルターンを含み、
前記浮遊電極は、前記フォイルターン間の前記固体絶縁物内に配置され、
前記容量性素子は、前記浮遊電極と前記巻線の前記フォイルとの間に形成される、請求項1または2に記載の非液浸漬変圧器。 - 前記導電性巻線は、フォイル、ストラップまたは連続転位導体によって形成されたディスクコイルを含む、請求項1または2に記載の非液浸漬変圧器。
- 前記浮遊電極は、前記ディスクコイルのディスクのターン間の固体絶縁物内に配置され、
前記容量性素子は、前記浮遊電極と前記導電性巻線の前記ターンとの間に形成される、請求項4に記載の非液浸漬変圧器。 - 前記浮遊電極は、前記ディスクコイルのディスク間に配置された浮遊リングであり、
前記容量性素子は、前記浮遊リングと前記導電性巻線の前記ディスクとの間に形成される、請求項4に記載の非液浸漬変圧器。 - 前記導電性巻線は、層を含む層ストラップ型コイルまたは層CTC型コイルを含み、各層は、ターンを有し、1つ以上の容量性素子は、前記浮遊電極と前記導電性巻線の前記層との間におよび/または前記層の前記ターンの間に形成され、または、
前記導電性巻線は、環状ケーブルを含むランダムワイヤ型コイルまたはワイヤドロップ型コイルを含み、前記容量性素子は、前記浮遊電極と前記導電性巻線の前記環状ケーブルとの間に形成される、請求項1または2に記載の非液浸漬変圧器。 - 前記浮遊電極は、前記固体絶縁物の一部に沿って配置される、先行する請求項のいずれか一項に記載の非液浸変圧器。
- 前記変圧器は、乾式変圧器を含む、先行する請求項のいずれか一項に記載の非液浸変圧器。
- 前記固体絶縁物は、ポリエステルフィルム、エポキシ樹脂、エナメルまたはメタアラミド材料のうちの1つを含む、先行する請求項のいずれか一項に記載の非液浸変圧器。
- 請求項1から10のいずれか一項に記載の容量性素子を含む乾式変圧器の固体絶縁物の少なくとも一部の老化度を評価する方法であって、前記方法は、
前記容量性素子の電気パラメータを測定するステップと、
前記電気パラメータ測定値に応じて老化度を計算するステップとを含み、
測定された前記電気パラメータは、複素誘電率である、方法。 - 測定された前記電気パラメータは、複素誘電率である、請求項11に記載の方法。
- 第1の時点において、前記容量性素子の第1の複素誘電率を測定するステップと、
第2の時点において、前記容量性素子の第2の複素誘電率を測定するステップと、
前記第1および第2の複素誘電率の測定値に応じて老化度を計算するステップとをさらに含む、請求項11または12に記載の方法。 - 電気パラメータを測定するステップは、広い周波数範囲において複素誘電率を測定することを含む、請求項11から13のいずれか一項に記載の方法。
- 電気パラメータを測定するステップは、0Hz〜5Hzの低周波数範囲において複素誘電率を測定することを含む、請求項11から14のいずれか一項に記載の方法。
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EP18382087.7 | 2018-02-15 | ||
EP18382087.7A EP3528266B1 (en) | 2018-02-15 | 2018-02-15 | Insulation of non-liquid immersed transformers |
PCT/EP2019/053740 WO2019158665A1 (en) | 2018-02-15 | 2019-02-14 | Insulation of non-liquid immersed transformers |
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JP6882611B2 JP6882611B2 (ja) | 2021-06-02 |
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JP (1) | JP6882611B2 (ja) |
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CN (1) | CN111656469B (ja) |
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CA (1) | CA3091461C (ja) |
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US11594361B1 (en) * | 2018-12-18 | 2023-02-28 | Smart Wires Inc. | Transformer having passive cooling topology |
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CN206961661U (zh) * | 2017-07-31 | 2018-02-02 | 国网上海市电力公司 | 干式自耦变压器 |
CN109030885B (zh) | 2018-07-26 | 2024-05-03 | 国网青海省电力公司海东供电公司 | 变压器高压桩头测试电极及变压器 |
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BR112020013416A2 (pt) | 2020-12-01 |
ES2837975T3 (es) | 2021-07-01 |
JP6882611B2 (ja) | 2021-06-02 |
CN111656469A (zh) | 2020-09-11 |
WO2019158665A1 (en) | 2019-08-22 |
BR112020013416A8 (pt) | 2022-10-18 |
DK3528266T3 (da) | 2021-01-04 |
CA3091461A1 (en) | 2019-08-22 |
PL3528266T3 (pl) | 2021-04-19 |
US20210050145A1 (en) | 2021-02-18 |
US11335498B2 (en) | 2022-05-17 |
KR20200098699A (ko) | 2020-08-20 |
CA3091461C (en) | 2021-05-25 |
EP3528266B1 (en) | 2020-10-21 |
EP3528266A1 (en) | 2019-08-21 |
CN111656469B (zh) | 2022-03-25 |
KR102200163B1 (ko) | 2021-01-08 |
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