TW419878B - An electric high voltage ac machine - Google Patents

An electric high voltage ac machine Download PDF

Info

Publication number
TW419878B
TW419878B TW086107962A TW86107962A TW419878B TW 419878 B TW419878 B TW 419878B TW 086107962 A TW086107962 A TW 086107962A TW 86107962 A TW86107962 A TW 86107962A TW 419878 B TW419878 B TW 419878B
Authority
TW
Taiwan
Prior art keywords
patent application
winding
grounding
machine
ground
Prior art date
Application number
TW086107962A
Other languages
English (en)
Inventor
Mats Leijon
Bertil Berggren
Lars Gertmar
Erland Sorensen
Jan-Anders Nygren
Original Assignee
Abb Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from SE9602078A external-priority patent/SE510192C2/sv
Priority claimed from SE9602079A external-priority patent/SE9602079D0/xx
Priority claimed from SE9700335A external-priority patent/SE508556C2/sv
Priority claimed from SE9700347A external-priority patent/SE510631C2/sv
Application filed by Abb Ab filed Critical Abb Ab
Application granted granted Critical
Publication of TW419878B publication Critical patent/TW419878B/zh

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • 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
    • 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
    • H01F27/288—Shielding
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • 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
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F2027/329—Insulation with semiconducting layer, e.g. to reduce corona effect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/15—Machines characterised by cable windings, e.g. high-voltage cables, ribbon cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
    • Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
    • Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
    • Y10S174/19—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in a dynamo-electric machine
    • Y10S174/20—Stator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
    • Y10S174/26—High voltage cable, e.g. above 10kv, corona prevention having a plural-layer insulation system
    • Y10S174/27—High voltage cable, e.g. above 10kv, corona prevention having a plural-layer insulation system including a semiconductive layer
    • Y10S174/28—Plural semiconductive layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Description

413S7S A7 B7___ 五、發明説明（1 ) 發明之葫域： (請先閲讀背面之注意事項再填寫本頁) 本發明與一種髙電壓交流機有關，此交流機意欲被用 來直接連接於分布或傳送網路，該交流機包含至少一個繞 線· 經濟部中央標隼局貞工消費合作社印製 保羅席得勒（Paul R . Siedler)於 1 932年1 0月1 5日出版之電力世界的第5 24頁至 5 2 7頁之"絕緣研究所產生之3 6千伏發電機” 一文中 說明此種具有髙至3 6千伏之額定電壓的發電機β這些發 電機包含高電壓纜線所形成之繞線•其中絕緣部分被細分 爲具有不同介電常數的種種不同之層•所使用之絕緣材料 由葉形雲母、漆釉和紙等三種成分之種種組合所形成· 電力研究所於1 9 84年4月發表之EPR I ，EL 一 3 3 9 1之一文中提出一種發電機之概念，利用此概念 所提供之高電壓使得發電機能直接連接於動力網路而不需 任何中間變壓器•此種發電機被認爲包含超導轉子。於是 此超導場之磁化能力使其有可能利用具有足夠厚度之空i 間隙繞線來承受電力•然而，其所提出之轉子卻是具有十 分厚之絕緣部分的複雜結構，該絕緣部分大大地增加機器 之大小。除此之外，必須施行特殊量測以便將線圈端之區 段加以絕緣和冷卻· ’ 依照本發明之所謂高電壓交流機，即指發電機等轉動 電機，這些發電機用在產生電力之動力站、雙進給機、外 極機、同步機，反同步轉換器串級、以及電力變壓器。欲 使（除了變壓器以外之）此種機器（下文中通指電路網路 本紙張尺度適州中國國家標準（CNS ) A4規格（2丨0X297公釐）_ 4 - 413S7S at _ B7___ 五、發明説明（2 ) )連接於分布和傳送網路*迄今仍需變壓器來轉換高至網 路強度之電壓，即1 3 0至4 0 0千伏之範圍· 以具有與電力傳送所用之觫線相似之結構的固體絕緣 部分來製造絕緣之髙電壓導體的這些機器之繞線，則機器 之電壓所增加之強度可使機器能直接連接於任何電力網路 而無需中間變壓器*因此可省略此變壓器•這^機器之典 型工作範圍爲3 0至8 0 0千伏· 對此種機器而言，須特'別注意接地問題·. 發電機系統和其他類似電力系統之接地意指連接電氣 系統至接地位能的刻意量測*當系統之所稱的中性點爲可 得時*此中性點通常以直接或經由遑切之阻抗的方式連接 於接地。亦會發生的是系統中之其他點連接至接地•若系 統中之一點被接地|則只要有流電接點之延伸便可使整個 系統接地。 所用之接地原理由系統之設計決定。對含有發電機直 接連接於Y-△聯式步起變壓器且使△繞線處於發電機*, 壓的系統而言，最常見下列之接地替代例。 經濟部中央標準局貝工消費合作杜印製 (請先閲讀背面之注意事項再填寫本頁) - 高電阻接地 - 無接地 - 共振接地· 高電阻接地之一般實施方法係將低歐姆電阻器連接於 分布變壓器之次件中且使變壓器之主繞線從發電機中性點 連接至接地。此種習知技術之接地顯示於附11 1中，此附 圇顯示發電機2藉由Y—△聯式步起變壓器3連接至網路 本紙乐尺度通用中國园家標準（CNS)八4規格（210X297公釐）-5 - 413S78 A7 B7 五、發明説明（3 ) 9·分布變壓器之主件11連接於發電機2之中性點與接 地之間*變壓器之次件1 0中連接電阻器1 2 * (請先聞讀背面之注意事項再填寫本頁) 在發電機中性點與接地之間直接設立高歐姆電阻器當 然可獲得相同種類之接地· 未接地之電氣系統缺乏任何刻意通向接地之連接•因 此•除了進給不同之繼電器和儀器所用之可能電壓之欒壓 器以外，未接地之發電機在其中性點與接地之間並沒有連 接· 共振接地通常亦如附圖1中所示般地實施•其中以電 抗器1 2 a取代電阻器1 2 ·選定之電抗器電抗使得通往 接地障礙之線路期間的電容式電流被電抗器1 2 a供給之 電感式電流的相等分量加以中和· 低電阻或低阻抗接地與上述系統之有效接地亦皆爲可 能。低電阻或低阻抗接地將造成較低之暫態過電壓與較高 之接地障礙電流，此電流會引起機器之內部損毀* 經濟部中央標準局員工消費合作社印裝 在發電機中性點與接地之間刻意插置電阻便可達成g < 電阻接地。此電阻可直接插置而與接地連接或者以間接方 式插置於變壓器之次件內•此變壓器之主件連接於發電機 中性點與接地之間•參照附圖1。 低阻抗接地（即低電感接地）以相同於低電阻接地之 方式完成，其中以電感器來代替電阻器*如前所討論者· 該電感之歐姆值小於共振接地所寄者。 對包含數個發電機之系統而言，低電阻或低阻抗接地 爲適切之方式，其中該發電機連接於共同進給線或匯流排 本紙張尺度適用中國國家樣準{ CNS ) A4規格（2丨0X297公釐）_ 6 _ 413873 at ___B7___ 五、發明説明（4) 且在發電機終端與共同匯流排之間有電路中斷器· 發電機之中性點的有效接地具有大體上與低電阻或低 阻抗接地相同之優點和缺點，其中僅有某些差異。 若滿足限制接地阻抗之大小的某些阻抗要件，則稱系 統被有效接地。在有效接地之系統中，接地障礙之情況下 的未障礙相位之最大相位至接地的電壓被限制爲相位至相 .位的電壓之8 0% · 電力系統網路主要係藉由系統中之變壓器之中性點的 接地連接來作接地且能以稱作直接接地之方式地不含阻抗 (除接觸電阻之外）或具有某些阻抗。 例如電機電子工程院（I EEE)於1 9 8 9年9月 在美國紐約出版之IEEE第C62.92-1989號 文件的電力設施系統之中性接地之應用之I E E E指引之 第二部分一同步系統之接地中說明先前已知之接地技術* 經濟部中央標準局員工消资合作社印製 (請先閱讀背面之注意事項再填窩本萸) 若如上所述地藉低電阻或電感來使發電機中性點作接 地，則從發電機中性點至接地之第三諧和電流將形成路^ •若直接接地或低阻抗接地變壓器繞線或另一低阻抗接地 發電機皆直接連接至發電機，則第三諧和電流在正常情況 下流通於各者之間。 瑞典專利第9 6 0 2 0 7 8 — 9號與第 9 7 0 0 3 4 7 — 9號文件中說明與本發明有關之種類的 交流電機之發電機與馬達操作中之第三諧和電流問題之解 決技術β 本發明之目的爲提出一種髙電壓交流機，此機器適於 本紙張尺度適用中國國家標丰（CNS ) Α4規格（210 X 297公釐）_ 7 _ 經濟部中央樣準局貝工消費合作杜印製 4lCfS?S at ____B7____五、發明説明（5) 如上所指地直接連接於分布或傳送網路且此機器設置有接 地機構，該接地機構適用於機器之不同用途及操作條件。 被說明之引言部分中加以界定且具有申請專利範圍第 1項所描述之特色的種類之高電壓交流機可獲致此目的* 依照本發明之機器的‘重要優點所依據之事實爲具有半 導體特性之第二層外側的繞線之終端區域內之電場幾乎等 於零♦因此在繞線外側無窬控制電場且在薄層內、或繞線 終端區域內、或其間之暫態中皆不會形成場集中。 根據依照本發明之機器的有利實施例，至少兩個相鄰 層具有大體上相等之熱膨脹係數•如此方式便可避免繞線 中之熱活動所造成之缺陷、裂縫或類似物等等· 根據依照本發明之機器的另一有利寊施例》該接地機 構包含繞線之低電阻接地所用之機構•依此方式則可將暫 態過電壓以及接地障礙電流限制成適當值。 根據依照本發明之機器的又另一有利之實施例，其中 該機器具有γ聯繞線，此繞線爲可得之中性點，而高電 接地機構包含連接於變壓器之次件中的電阻器，該變壓器 之主件連接於中性點與接地之間。此方式可使變壓器之次 件中所用的電阻器具有十分低之歐姆值且具有粗簡之結構 •利用適當大小之電阻器可獲致足夠之阻尼以便將暫態過 電壓降至安全強度•再者•限制障礙電流所造成的線路至 接地之障礙期間將機械式應力和障礙損害加以限制•此種 接地裝置亦比發電機中性點與接地之間直接插置高歐姆電 阻器之情形更具經濟性· [張尺度適用中國國家標準（CNS ) A4規格（210ί 297公釐）_ 〇 _
Im m^, ^------^ ,* ' (請先Μ讀背面之注意事項再填寫本頁) 經濟部中央橾準局貝工消費合作社印製 41^875 at ____.__B7__五、發明説明（6 ) 根據依照本發明之機器的另一有利之實施例，其中該 機器具有Y聯繞線•此繞線爲可得之中性點•其接地機構 包含連接於變壓器之次件中的電抗器|該變壓器之主件連 接於中性點與接地之間，該電抗器具有之特徴使得接地障 礙期間之電容式電流大體上被電抗器供出之電感式電流中 之相等分*加以中和*依此方式，則網線障礙電流被如此 形成之並聯共振電路降至低值，且該電流實際上與障礙電 壓同相位。此情況下之障礙相位上所回復之電壓十分緩慢 且因此具有暂態特性之任何接地障礙將在共振接地系統中 被自動地消除。 根據依照本發明之機器的又一其他之有利實施例，接 地機構包含連接至機器之網路側的Y —△接地變壓器或稱 作Z形之接地變壓器者•此種接地變壓器之用法與相關於 障礙電流強度和暫態過電壓之低電感或低電阻接地之者相 同。 現在將參照鼸附圖畫中之附圖2至附圖11來較詳細、 地說明選定之例而以依照本發明之機器的較詳細實施例來 解釋本發明|其中 附圈1圖示同步發m機之習知技術的接地， 附躕2顯示依照本發明之機器的繞線中所用之絕緣導 體之例， 附圖3顯示連接至電力系統之Y聯發電機或馬達形式 的未接地三相機器， 附圖4至附圖13顯示附圚3中之Y聯機器的不同接 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度通用中國國家樣率（CNS M4说格（210X297公釐）-0 _
4.1557S 經濟部中央標準局貝工消費合作社印製 A7 B7_五、發明説明（7 ) 地例| 附圖1 4顯示依照本發明之機器，此機器具有連接至 電力系統之△聯發電機或馬達之形式，且 附圖1 5圖示附圖1 4所示之系統中之接地變壓器的 用法· 附圖2中顯示絕緣導體之例，此導體可被用於依照本 發明之機器的繞線中》此種絕緣導體包含至少一個由若干 非絕緣式且可能地爲絕緣式之線股5所構成之導體4 *導 體4之周圍有半導體內贗6|此內層與至少某些非絕緣線 股5接觸*此半導體內曆6在運轉時被以突出之固體絕緣 層7爲形式之纜線之主要絕緣部分所包圍·絕緣層被半導 體外層8所包圍•纜線之導體面積可在8 0及3 0 0 0平 方釐米之間變動且纜線之外直徑在2 0及2 5 0釐米之間 附圖3顯示無接地之高電屋交流機示意圖，該髙電壓 交流機之形式爲直接連接於電力系統16之Y聯發電機或 馬達1 4。 附圚4顯示形式爲過高電壓保護器之接地構件像非線 性電阻防止器1 8 —樣連接於Y聯機器1 4之中性點2 0 與地極之間*連接於中性點之非線性電阻防止器1 8保護 用於機器繞線之被絕緣的導體來防止短暫過髙電壓，例如 因閃電而引起之過髙電壓。 附圖5顯示具有並連於非線性電阻防止器18之高歐 姆電阻器2 2之實施例•非線性電阻防止器1 8與顯示於 {請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210X2S)7公釐）-- 經濟部中央標準局員工消费合作社印裝 412S7S a? B7 五、發明説明（8) 附圖4中之實施例之相同方式作用於此實施例，且因具有 電阻器2 2 ·能利用測量電阻器22之跨電壓得以敏銳的 探測到地極障礙· 附圖6顯示具有中性黏20之高《阻接地•在此實施 例中使用與敘述於與附圖1有關之既知技術相似之技術* 因此電阻器2 4連接於變Μ器之二級體2 6且具有從機器 1 4之中性點2 0連接於地極之變壓器之主體繞線2 8 · 相較於高歐姆電阻器|電阻器2 4爲較低歐姆.且具有粗糙 之結構，該高歐姆電阻器可能需要用於在中性點2 0及地 極之間之直接連接以得到相同之結果•結果，電阻器之電 壓級數可被減低*還有在此例中，非線性電阻防止器1 8 並連於主體繞線2 8。利用此實施例，在線路至地極障礙 期間，機械壓力及障礙損害可限制障礙電流來加以限制* 短暫過髙電壓被加以限制在安全水平且接地裝置較直接加 入電阻器來得經濟· 機器之共振接地可以相同的方示將電抗器置換電阻器， 2 4來施行，而此電抗器具備之特質能使電容性罨流在線 路至地極障礙期間能被電抗器所貢獻之感應電流之相同成 分所中和•因此淨障礙電流被因此形成之並連之共振電流 所減少且此電流本質上能與障礙電壓同相位。障礙消失之 後，障礙相位上之電壓回復將會非常緩慢且決定於感應性 反應與變壓器/電抗器組合之有效電阻之比值而定*結果 ，任何短暫本質之地極障礙將在此共振接地系統中自動的 消失。因此•這樣的共振接地機構實際上將地極障礙電流 ----------裝-----^--訂------1 {請先閱請背面之注意Ϋ項再填寫本頁) 本紙張尺度適用中國國家標準（CNSM4规格（210Χ297公釐> _ _ 經濟部中央標準局貝工消費合作杜印製 4lliS73 A7 __B7_ 五、發明説明（9 ) 限制爲零，因而減少了機械壓力•在相位至地極障礙發生 後，可允許機器之再度繼續運作，直到安排成序之停工爲 止· 附跚7顯示之實施例具有連接於中性酤2 0及地極之 間之非線性電阻防止器1 8且接地變應器3 0連接於機器 1 4之網路邊上。接地變壓器3 0爲Y — △設計且具有連 接於地極之Y聯之中性點，而△—橈線卻單獨存在•使用 接地變壓器之系統通常沒有接地或具有高阻抗地極連接· 作爲一個系統之成分而言，接地變壓器沒有承載負載且不 影響正常之系統行爲當不平衡發生時，接地變壓器在零 序列網路中提供低的阻抗。接地變壓器在此方法中相當於 相應於障礙電流水平及短暫過高電壓之低《感及低m阻。 接地變壓器也可爲具有放置特別繞線之所謂的Z形變 壓器，見如保羅安得森（Paul Μ · Anders-〇 η)之#障礙的電力系統分析'愛荷華州立大學刊物/ 愛姆斯市，1983年第255頁至257頁· ' 一種可能的輔助性電力變壓器也可使用來用於此種接 地目的。 附圚8顯示之實施例具有在機器1 5之中性點2 0與 地極之間連接之低歐姆電阻器3 2 ·這種低電阻接地之主 要優點在於低電阻接地有限制短暫及暫時過高電壓之能力 。然而，在單相地極障礙的例子中，電流會較髙。且在無 擾動操作中第三諧和電流將會較髙。 附圖9顯示依照本發明之機器之可替代之實施例，其 本紙張尺度適用中國國家標準（CNS)A4規格（2丨0X297公釐）_ 12 - ----------杜衣------ΐτ------^ (請先閲讀背面之注意事項再填寫本页)
419S7S A7 B7 五、發明説明（10) 中電阻器3 2被連接於中性點2 0及地極間之低電感電感 器3 4所替代•低電感接地實質上與低歐姆接地以相同方 式運作•«感器3 4之歐姆值小於共振接地所需之歐姆值 •，有別於附圖6之敘述· 它們可與變壓器之幫助物間接連接*來替代中性點 2 0及電阻器3 2或電感器3 4之地極間之直接連接，其 變壓器之主«連接於中性黏2 0及地極之間且其二極體包 含電阻器或電感器，相較附圖6之敘述* 附圖10中，顯示之實施例包含機器1 4之中性點 2 0及地極間串列連接之阻抗3 6及3 8，阻抗3 6具有 低的阻抗值且阻抗2 8具有髙的阻抗值•阻抗3 8可被短 路裝置4 0所短路•在正常的操作下，爲了減小第三諧和 電流，短路裝置40被斷路•在地極障礙之例子中，控制 短路裝置4 0將阻抗3 8短路，且中性點2 0之電位將會 變低且至地極之電流將會相對較高· 在機器1 4中之內地極障礙的例子中，阻抗3 8並邊， 有被短路*結果*中性點20內之電壓將會變高但會限制 至地極之電流*在這種情況下，既然此例中之高電流能昇 髙到損害的程度，則此種方法爲佳· 爲了解決當第三諧和將交流電機器直接連接於三相電 力網路所引起的問題，即•機器與網路之間沒有使用到加 壓變壓器；可使用被調整到第三諧和形式爲抑制型濾波器 35、37之接地構件與過電壓保護器39 ·見附圖11 •濾波器因此能包含一並連之共振電路•其電路則包含電 本纸張尺度適用中國國家標準（〇奶）八4規格（2丨0：<297公釐）_13_ T-Τ'裝------訂------· ^ • *· τ填r . (請先《讀背面之注意事項再填寫本頁) 經濟部中央榡準局負工消费合作社印製 41ί?873 Α7 Β7 五、發明説明（U) (請先Μ讀背面之注意事項再填寫本頁) 感器3 5及電容性電抗器3 7 *濾波器3 5、3 7之大小 及其過m懕保護器3 9能使並連線路有能力能吸收在機器 運作期間從機器1 4而來之第三諧和•但卻會限制短暫及 暫時過髙竃壓· 以障礙爲例，若陣礙過大的話·過電壓保護器3 9將 限制障礙電簠使障礙電流流經過電壓保護器3 9 ·以單相 地極障礙爲例既然基礎阻抗較低，相較於如高電阻接地之 例而言，電流將會較高· 附圓12顯示之實施例，其中接地機構包含去調可轉 換之第三鍇合抑制濾波器*其以並連方式連接於過電屋保 護器4 0 *此種濾波器可以數種不同方法被實施·附圖 1 2顯示之例子包含兩個以串列連接之電感4 2、4 4與 以並連方式連接於串列遽接電感器4 2、4 4之電容器 46 »再者，短路裝置48跨過電感器44而連接* 經濟部中央樣準局負工消費合作杜印製 當濾波器、機器1 4及網路1 6問之諧合共振之危險 被探測到時，藉由將感應器短路•可控制短路裝置4 8而 將濾波器之特性改變•瑞典專利申請9 7 0 0 3 4 7 - 9 對此有詳細的記載*以此方法，第三諧合電流在正常操作 下被強制限制*短暫及暂時過電fi將爲有限，在單相地極 障礙之例中*電流將會較高•與附圖11中之敘述之方式 相同· 附圈1 3顯示之實施例，其中機器1 4之中性點2 0 在21直接連接於地極•道種直接接地限制短暫及暫時過 高電壓，但導致接地障礙中之高電流•從機器之中性點至 本紙張尺度通用中困困家樣準（CNS ) Α4規Λ· ( 210Χ297公釐）-14 -
410S7S A7 _B7___五、發明説明（12) 地極流動之第三諧和電流在正常操作下將會相對較高· 再爲可替代的是，依照本發明之機器之接地機構可包 含用來提供具有令人滿意之阻抗性質之地極至中性點之連 接之主動電路· 附圖1 4中，顯示直接連接於分布或俥送網路1 6之 △聯之三相機器5 0 * 在此情況下，與附圓7所顯示之實施例爲相同種類之 接地變壓器可連接在機器5 0之網路邊上。 如附圖7之實施例，接地變壓器可爲具有Y連接地極 中性點之Y — △連接變壓器，或稱之爲Z形接地變壓器， 其爲具有Z接地之Z — 0連接變壓器。接地變壓器將會限 制暫態過電壓· 如附圖7所示，可能之辅助電力變磨器亦可用於此目 的· ----------^.------17------^ -1 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消费合作社印製 本紙張尺度適用中國國家標準（CNS>A4規格（2丨0X297公釐> —_

Claims (1)

  1. 者 4 者 4 A8 B8 C8 D8 41?S7S 六、申請專利範圍 ♦ · 1 —種高電壓交流機*意欲直接與分布或傅送網路 (1 6 )相連接，該機器含有至少一個^線，此繞線包含 ^^1 ^^^1 ^^^1 n^i —ϋ I— I. ..^.1 (請先M讀背面之注意事項再4寫本頁) f4—個絕緣之載流導e ( 4 >*其特徵爲具有半導體性 質之第一靥被設置在在該導體（4 )四周•固體絕緣層（ 7 )被設置在該第一層四1周，且具有半導體性質之第二層 C 8 )被設置在該絕緣曆四周，且其中設置有接地機構（ 18、21、22、24、26、28、30、32、 34、35、36、37、38 '39、40、42、 44、46、48、52)來使該繞線之至少一個點與接 地相連接。 2 2 .依照申請專利範圍第1項，其特徵爲該第 一層之位能大體上等於導體之位能 3 .依照申請專利範圍第1其特徵爲該第 二層被列置成大體上構成圍繞該導髏之等位面。 4 .依照申請專利範困第3項^，其特徵爲該第 二層被連接至預定之位能· 其特徵爲該預 經濟部中央搮芈局貝工消費合作社印製 5 .依照申請專利範圍第4項， 定之位能爲接地位能· 6 ·依照申請專利範園第1項難，其特徵爲至少 兩個相鄰之層具有大體上相等之熱膨數· 7 .依照申請專利範圍第1項£^1»，其特徵爲該載 流導體包含若干線股，僅有少部分之該線股彼此沒有隔絕 8 .依照申請專利範圍第1項、第2項、第3項 '第 本紙張尺度逋用中國國家揉準（CNS) A4说格（210X297公釐） 16 AS Β8 C8 D8 41·)δ75 六、申請專利範圍 4項、第5項、第6項或第7琪特徴爲各該 層以沿著整個連接表面之固定方式連接至相鄰餍 (請先《讀背面之注意Ϋ項再填寫本頁) 9 . 一種高電壓磁場之電力交流機*該機器包含磁核 與至少一個繞線，其特徵爲該繞線爲纜線之形式，該纜線 包含一個或更多個載流導體，各導體具有若干線股、設置 在該半導體內層之四周的固體絕緣材質之絕緣層、以及設 置在該絕緣層之四周的半導體外層，且其特徵爲設置有接 地機構以便將該繞線之至少一酤連接至接地·. 1 0 .依照申請專利範騸第9項，其特徵爲該 :，Λ Μ線亦包含被覆和金靥遮蔽· 1 1 .依照申請專利範第9 其特徵爲該 接地機構包含繞線之直接接地所用之機構· 所用之諷‘\。 12嫌· 1 2 ·依照申請專利範圔第9項，其特徴爲該 接地機構包含繞線之低電阻接地所用之 13. 依照申請專利範圍第12項之·該機器具 有Y聯繞線，此繞線爲可得之中性點，其特徴爲該低竈阻’ 接地機構包含連接於中性點與接地之間電阻電阻器。 經濟部中央揉準局貝工消费合作社印«- 14. 依照申請專利範圍第12項機器具 有Υ聯繞線*此繞線爲可得之中性點，其特該低電阻 接地機構包含連接於變壓器之次件內的電阻器，該變壓器 之主件連接於中性點與接地之間· ，上J 1 5 .依照申請專利範圃第9項•其特徴爲該 -\ 接地機構包含繞線之低電感接地所用的· 1 6 .依照申請專利範園第1 5該機器具 本紙張尺度適用中a國家搞準（CNS)A4规格（ 210X297公釐）_ 17 - 41^37> A8 B8 C8 D8 六、申請專利範圍 2 4 .依照申請專利範圍第9 該機器具有 Y聯繞線，此繞線爲可得之中性點，其特徴i該接地機構 包含連接於變應器之次件內的電抗器，該變壓器之主件連 接於中性點與接地之間*該電抗器所具有之特徵使得接地 錯誤期間之容電流大髏上可被電抗器供出之感應電流中之 相等分量中和》 ίΜ^' 25.依照申請專利範圍第9項 其特徵爲該 接地機構包含連接至接地之阻抗的改變機構7以便回應接地 經濟部中央揉準局只工消费合作社印装 錯誤· 26.依照申請專利範圍第9 接地機構包含主動電路* 2 7 .依照申請專利範困第9 接地機構包含Y-△接地變壓器， 網路側。 2 8 .依照申請專利範国第9 接地機構包含稱作Z形之接地變壓 器之網路側。 2 9 .依照申請專利範園第9 Y聯繞線，此繞線爲可得之中性點 包含調成第η次諧和的壓制濾波器 3 0 .依照申請專利範圍第9 Υ聯繞線，此繞線爲可得之中性點 包含解調成第η次諧和的可切換式 31.依照申請專利範圍第2
    其特徵爲該 項之HSP，其特徵爲該 此變壓器連接至機器之 身 器*此變¥器連接至機 I ·- I ^^1 1^1 ^^1 - i n ^^1 In (請先》讀背面之注意事項再填寫本頁) 特徵爲該 ^該機器具有 其特該接地機構 項機器具有 其特徵爲該接地機構 壓制嫌波器、:·& 9項芝iiS 其特徵爲 本纸張尺度適用中國两家梯準（CNS)A4说格（2!0><297公釐）_ 19 - B8 C8 DS 六、申請專利範圍 有Y聯繞線，此繞線爲可得之中性黏•其特徽爲骇低電感 接地機構包含連接於中性酤與接地之^|5^電感憊感_器· 1 7 .依照申請專利範園第1 該機器具 有Y聯蹺線，此繞線爲可得之中性黏，其特該低電感 接地機構包含連接於變壓器之次件內的竃感器，該鏵壓器 之主件連¥於中性黏與接地之間· 8.依照申請專利範_第
    其特微爲該 接地機構包含嫌鎳之高電阻接地所用的機
    經濟部中央椹率局貝工消费合作社印¾ 1 9 ·依照申腈專利範園第1 8項乏11^·該機器具 有Y聯繞線，此繞線爲可得之中性黏·其特徴爲該高m阻 接地機構包含連接於中性黏與接地之^^電阻電阻器· 2 0 .依照申猜專利範園第1 8項該機器具 有Y聯繞線，此繞線爲可得之中性點，其特徽爲胲髙電阻 接地機構包含連接於樊壓器之次件內的電'阻器，該變壓器 之主件連接於中性黏與接地之間· 21 .依照申請專利範圈第9項；*其特徴爲該 接地機構包含繞線之高電感接地所用 2 2 .依照申請專利範圍第2 1項之該機器具 有Y聯繞線*此嫌線爲可得之中性黏，其特微爲該髙電感 接地機構包含連接於中性黏與接地$感電感器 23.依照申請專利範園第2 有Y聯艉線*此繞線爲可得之中性黏 該機器具 其特曾"爲胲高《感 接地機構包含連接於變懕器之次件內的電感器*該變壓器 之主件連接於中性點與接地之間· 本纸乐尺度逍用中《国家#準（CNS>M規格（210XW7公釐夂18 Ί ^-- (請先«讀背面之注項再填寫本頁) 訂 A8 B8 C8 D8 419S7S 六、申請專利範圍 該第η次諧和爲第三次諧和· 3 2 .依照申請專利範圍第9 機器具有 Υ聯繞線，此繞線爲可得之中性點·其特徵爲該接地機構 包含連接於該中性點與接地之間的過電壓保護器· 33.依照申請專利範圃第18項、第19項、第 20項、第21項、第22項、第23項、第24項，第 2 5項、第2 6項項，第28項、第29項、第 3 0項或第3 1會機器具有Y聯繞線，此繞線 爲可得之中性點，其特徵爲過電壓保護器連接於該中性點 與接地之間而與該接地機-成並聯· 3 4，一種分布或傳，其特徵爲此縟路包含至 \ - 少一個依照申請專利範圔第\m 9項 ---------裝-- *I (請先《讀背面之注意事項再填寫本I)
    以 *1T- 經濟部中央標準局®:工消費合作社印策 本紙張尺度適用t國國家樣準（CNS ) Α4規格（2丨0Χ297公釐）_ 20--
TW086107962A 1996-05-29 1997-06-10 An electric high voltage ac machine TW419878B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9602078A SE510192C2 (sv) 1996-05-29 1996-05-29 Förfarande och kopplingsarrangemang för att minska problem med tredjetonsströmmar som kan uppstå vid generator - och motordrift av växelströmsmaskiner kopplade till trefas distributions- eller transmissionsnät
SE9602079A SE9602079D0 (sv) 1996-05-29 1996-05-29 Roterande elektriska maskiner med magnetkrets för hög spänning och ett förfarande för tillverkning av densamma
SE9700335A SE508556C2 (sv) 1997-02-03 1997-02-03 Krafttransformator/reaktor
SE9700347A SE510631C2 (sv) 1997-02-03 1997-02-03 Förfarande och anordning för att minska trdjetonsfenomen vid direktanslutning av växelströmsmaskiner

Publications (1)

Publication Number Publication Date
TW419878B true TW419878B (en) 2001-01-21

Family

ID=27484787

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086107962A TW419878B (en) 1996-05-29 1997-06-10 An electric high voltage ac machine

Country Status (24)

Country Link
US (1) US6891303B2 (zh)
EP (1) EP0888661B1 (zh)
JP (1) JP2000511392A (zh)
KR (1) KR20000016037A (zh)
CN (1) CN1101988C (zh)
AR (1) AR007339A1 (zh)
AT (1) ATE254815T1 (zh)
AU (1) AU718681B2 (zh)
BR (1) BR9709619A (zh)
CA (1) CA2255739A1 (zh)
CO (1) CO4650249A1 (zh)
CZ (1) CZ385898A3 (zh)
DE (1) DE69726267T2 (zh)
EE (1) EE03408B1 (zh)
HK (1) HK1021085A1 (zh)
NO (1) NO985553D0 (zh)
NZ (1) NZ333599A (zh)
PE (1) PE82798A1 (zh)
PL (1) PL330225A1 (zh)
RU (1) RU2211518C2 (zh)
TR (1) TR199802471T2 (zh)
TW (1) TW419878B (zh)
UA (1) UA45452C2 (zh)
WO (1) WO1997045926A2 (zh)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE512952C2 (sv) * 1997-09-30 2000-06-12 Abb Ab Förfarande och anordning vid jordning hos en roterande elektrisk maskin, samt roterande elektrisk maskin
SE0003037D0 (sv) * 2000-08-29 2000-08-29 Abb Ab Elektrisk maskin
DE10049817B4 (de) * 2000-10-09 2006-12-07 Siemens Ag Induktionsvorrichtung mit Dämpfungseinrichtung
EP1280259A1 (de) * 2001-07-23 2003-01-29 ALSTOM (Switzerland) Ltd Generator zur Erzeugung hoher Spannungen
SE525387C2 (sv) * 2002-01-10 2005-02-08 Swedish Vertical Wind Ab Vertikalaxlat vindkraftaggregat och användning av detsamma
DE102006014613A1 (de) * 2006-03-29 2007-10-11 Siemens Ag Elektrische Maschine mit Dämpfungswicklung
EP1879279B1 (en) * 2006-07-14 2011-11-30 Ansaldo Energia S.P.A. Stator of a turbo generator
US7876539B2 (en) * 2006-10-23 2011-01-25 Pentair Pump Group, Inc. Electrical apparatus with current dampening device
US7589943B2 (en) * 2007-03-24 2009-09-15 Ramirez Vanessa De Los Angeles GIC reducer
US20100123356A1 (en) * 2008-11-14 2010-05-20 General Electric Company Resonance mitigation system and method
US8901790B2 (en) 2012-01-03 2014-12-02 General Electric Company Cooling of stator core flange
US20140058202A1 (en) * 2012-08-21 2014-02-27 Robert Rife Bronchoscope cleaning device and method
KR101625812B1 (ko) * 2013-02-07 2016-05-30 에이비비 테크놀로지 리미티드 튜브형 절연 디바이스, 고전압 전력 장치 및 절연된 고전압 전력 케이블을 제공하기 위한 방법
CN104091629A (zh) * 2014-06-27 2014-10-08 罗广荣 避免谐波的方法和装置
DE102014213073A1 (de) * 2014-07-04 2016-01-07 Siemens Aktiengesellschaft Hochspannungseinrichtung für ein Fahrzeug
JP2017524232A (ja) 2014-08-07 2017-08-24 ヘンケル・アクチェンゲゼルシャフト・ウント・コムパニー・コマンディットゲゼルシャフト・アウフ・アクチェンＨｅｎｋｅｌ ＡＧ ＆ Ｃｏ． ＫＧａＡ 束ねられた送電ケーブルにおける使用のためのワイヤの電気セラミックコーティング
EP3154173A1 (en) 2015-10-08 2017-04-12 ABB Schweiz AG Electrical machine with an active grounding
CN108768093B (zh) * 2018-05-25 2020-04-07 长江勘测规划设计研究有限责任公司 巨型水轮发电机组阻抗型中性点接地方法
CN108512211B (zh) * 2018-05-25 2023-06-27 长江勘测规划设计研究有限责任公司 组合柜体式阻抗型巨型发电机组中性点接地装置
DE102019112828A1 (de) * 2019-05-16 2020-11-19 Schaeffler Technologies AG & Co. KG Elektromotor und Antrieb mit einem Elektromotor
US11152918B1 (en) * 2019-10-16 2021-10-19 National Technology & Engineering Solutions Of Sandia, Llc Low modulation index 3-phase solid state transformer
RU196814U1 (ru) * 2020-02-08 2020-03-17 Общество с ограниченной ответственностью "Росэнерготранс" (ООО "Росэнерготранс") Провод обмоточный реакторный
US11398725B2 (en) 2020-04-16 2022-07-26 Southern California Edison Company Circuit for reducing fire hazard risk in a power distribution network
CN112287519B (zh) * 2020-10-09 2024-03-22 南方电网科学研究院有限责任公司 一种三相变压器的雷击仿真模型及构建方法
US11239846B1 (en) * 2021-06-01 2022-02-01 SambaNova Systems, Inc. Variable-length clock stretcher with correction for glitches due to phase detector offset
JP7538457B1 (ja) 2024-01-17 2024-08-22 日新電機株式会社 保護システム

Family Cites Families (167)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952679A (en) 1960-09-13 Cyanuricacro preparation
US400616A (en) * 1889-04-02 Harrow attachment for land-rollers
US1304451A (en) 1919-05-20 Locke h
US681800A (en) 1901-06-18 1901-09-03 Oskar Lasche Stationary armature and inductor.
US847008A (en) * 1904-06-10 1907-03-12 Isidor Kitsee Converter.
US1418856A (en) 1919-05-02 1922-06-06 Allischalmers Mfg Company Dynamo-electric machine
US1481585A (en) 1919-09-16 1924-01-22 Electrical Improvements Ltd Electric reactive winding
US1756672A (en) 1922-10-12 1930-04-29 Allis Louis Co Dynamo-electric machine
US1508456A (en) * 1924-01-04 1924-09-16 Perfection Mfg Co Ground clamp
US1728915A (en) 1928-05-05 1929-09-24 Earl P Blankenship Line saver and restrainer for drilling cables
US1781308A (en) 1928-05-30 1930-11-11 Ericsson Telefon Ab L M High-frequency differential transformer
US1762775A (en) 1928-09-19 1930-06-10 Bell Telephone Labor Inc Inductance device
US1747507A (en) 1929-05-10 1930-02-18 Westinghouse Electric & Mfg Co Reactor structure
US1742985A (en) 1929-05-20 1930-01-07 Gen Electric Transformer
US1861182A (en) 1930-01-31 1932-05-31 Okonite Co Electric conductor
US1904885A (en) * 1930-06-13 1933-04-18 Western Electric Co Capstan
US1974406A (en) 1930-12-13 1934-09-25 Herbert F Apple Dynamo electric machine core slot lining
US2006170A (en) 1933-05-11 1935-06-25 Gen Electric Winding for the stationary members of alternating current dynamo-electric machines
US2217430A (en) 1938-02-26 1940-10-08 Westinghouse Electric & Mfg Co Water-cooled stator for dynamoelectric machines
US2206856A (en) 1938-05-31 1940-07-02 William E Shearer Transformer
US2241832A (en) 1940-05-07 1941-05-13 Hugo W Wahlquist Method and apparatus for reducing harmonics in power systems
US2256897A (en) 1940-07-24 1941-09-23 Cons Edison Co New York Inc Insulating joint for electric cable sheaths and method of making same
US2295415A (en) 1940-08-02 1942-09-08 Westinghouse Electric & Mfg Co Air-cooled, air-insulated transformer
US2251291A (en) 1940-08-10 1941-08-05 Western Electric Co Strand handling apparatus
US2415652A (en) 1942-06-03 1947-02-11 Kerite Company High-voltage cable
US2462651A (en) 1944-06-12 1949-02-22 Gen Electric Electric induction apparatus
US2424443A (en) 1944-12-06 1947-07-22 Gen Electric Dynamoelectric machine
US2459322A (en) 1945-03-16 1949-01-18 Allis Chalmers Mfg Co Stationary induction apparatus
US2409893A (en) * 1945-04-30 1946-10-22 Westinghouse Electric Corp Semiconducting composition
US2436306A (en) 1945-06-16 1948-02-17 Westinghouse Electric Corp Corona elimination in generator end windings
US2446999A (en) 1945-11-07 1948-08-17 Gen Electric Magnetic core
US2498238A (en) 1947-04-30 1950-02-21 Westinghouse Electric Corp Resistance compositions and products thereof
US2650350A (en) * 1948-11-04 1953-08-25 Gen Electric Angular modulating system
US2721905A (en) 1949-03-04 1955-10-25 Webster Electric Co Inc Transducer
US2749456A (en) * 1952-06-23 1956-06-05 Us Electrical Motors Inc Waterproof stator construction for submersible dynamo-electric machine
US2780771A (en) 1953-04-21 1957-02-05 Vickers Inc Magnetic amplifier
US2846599A (en) 1956-01-23 1958-08-05 Wetomore Hodges Electric motor components and the like and method for making the same
US2947957A (en) 1957-04-22 1960-08-02 Zenith Radio Corp Transformers
US2885581A (en) 1957-04-29 1959-05-05 Gen Electric Arrangement for preventing displacement of stator end turns
CA635218A (en) 1958-01-02 1962-01-23 W. Smith John Reinforced end turns in dynamoelectric machines
US2943242A (en) 1958-02-05 1960-06-28 Pure Oil Co Anti-static grounding device
US2975309A (en) 1958-07-18 1961-03-14 Komplex Nagyberendezesek Expor Oil-cooled stators for turboalternators
US3014139A (en) * 1959-10-27 1961-12-19 Gen Electric Direct-cooled cable winding for electro magnetic device
US3157806A (en) 1959-11-05 1964-11-17 Bbc Brown Boveri & Cie Synchronous machine with salient poles
US3158770A (en) * 1960-12-14 1964-11-24 Gen Electric Armature bar vibration damping arrangement
US3098893A (en) 1961-03-30 1963-07-23 Gen Electric Low electrical resistance composition and cable made therefrom
US3130335A (en) 1961-04-17 1964-04-21 Epoxylite Corp Dynamo-electric machine
US3197723A (en) * 1961-04-26 1965-07-27 Ite Circuit Breaker Ltd Cascaded coaxial cable transformer
US3143269A (en) 1961-11-29 1964-08-04 Crompton & Knowles Corp Tractor-type stock feed
US3268766A (en) 1964-02-04 1966-08-23 Du Pont Apparatus for removal of electric charges from dielectric film surfaces
US3372283A (en) 1965-02-15 1968-03-05 Ampex Attenuation control device
SE318939B (zh) 1965-03-17 1969-12-22 Asea Ab
US3304599A (en) 1965-03-30 1967-02-21 Teletype Corp Method of manufacturing an electromagnet having a u-shaped core
DE1488353A1 (de) * 1965-07-15 1969-06-26 Siemens Ag Permanentmagneterregte elektrische Maschine
US3365657A (en) 1966-03-04 1968-01-23 Nasa Usa Power supply
GB1117433A (en) 1966-06-07 1968-06-19 English Electric Co Ltd Improvements in alternating current generators
US3444407A (en) 1966-07-20 1969-05-13 Gen Electric Rigid conductor bars in dynamoelectric machine slots
US3484690A (en) 1966-08-23 1969-12-16 Herman Wald Three current winding single stator network meter for 3-wire 120/208 volt service
US3418530A (en) 1966-09-07 1968-12-24 Army Usa Electronic crowbar
US3354331A (en) * 1966-09-26 1967-11-21 Gen Electric High voltage grading for dynamoelectric machine
US3392779A (en) * 1966-10-03 1968-07-16 Certain Teed Prod Corp Glass fiber cooling means
US3437858A (en) 1966-11-17 1969-04-08 Glastic Corp Slot wedge for electric motors or generators
SU469196A1 (ru) * 1967-10-30 1975-04-30 Двигатель-генератор установки дл электроснабжени пассажирских вагонов
FR1555807A (zh) * 1967-12-11 1969-01-31
GB1226451A (zh) 1968-03-15 1971-03-31
CH479975A (de) 1968-08-19 1969-10-15 Oerlikon Maschf Wickelkopfbandage für eine elektrische Maschine
US3651402A (en) 1969-01-27 1972-03-21 Honeywell Inc Supervisory apparatus
US3813764A (en) * 1969-06-09 1974-06-04 Res Inst Iron Steel Method of producing laminated pancake type superconductive magnets
US3651244A (en) * 1969-10-15 1972-03-21 Gen Cable Corp Power cable with corrugated or smooth longitudinally folded metallic shielding tape
SE326758B (zh) 1969-10-29 1970-08-03 Asea Ab
US3666876A (en) * 1970-07-17 1972-05-30 Exxon Research Engineering Co Novel compositions with controlled electrical properties
US3631519A (en) 1970-12-21 1971-12-28 Gen Electric Stress graded cable termination
US3675056A (en) 1971-01-04 1972-07-04 Gen Electric Hermetically sealed dynamoelectric machine
US3644662A (en) 1971-01-11 1972-02-22 Gen Electric Stress cascade-graded cable termination
US3660721A (en) * 1971-02-01 1972-05-02 Gen Electric Protective equipment for an alternating current power distribution system
US3684906A (en) * 1971-03-26 1972-08-15 Gen Electric Castable rotor having radially venting laminations
US3684821A (en) 1971-03-30 1972-08-15 Sumitomo Electric Industries High voltage insulated electric cable having outer semiconductive layer
US3716719A (en) 1971-06-07 1973-02-13 Aerco Corp Modulated output transformers
JPS4831403A (zh) 1971-08-27 1973-04-25
US3746954A (en) 1971-09-17 1973-07-17 Sqare D Co Adjustable voltage thyristor-controlled hoist control for a dc motor
US3727085A (en) 1971-09-30 1973-04-10 Gen Dynamics Corp Electric motor with facility for liquid cooling
US3740600A (en) 1971-12-12 1973-06-19 Gen Electric Self-supporting coil brace
US3743867A (en) * 1971-12-20 1973-07-03 Massachusetts Inst Technology High voltage oil insulated and cooled armature windings
DE2164078A1 (de) 1971-12-23 1973-06-28 Siemens Ag Antriebsanordnung mit einem nach art einer synchronmaschine ausgebildeten linearmotor
US3699238A (en) * 1972-02-29 1972-10-17 Anaconda Wire & Cable Co Flexible power cable
US3758699A (en) 1972-03-15 1973-09-11 G & W Electric Speciality Co Apparatus and method for dynamically cooling a cable termination
US3716652A (en) 1972-04-18 1973-02-13 G & W Electric Speciality Co System for dynamically cooling a high voltage cable termination
US3787607A (en) * 1972-05-31 1974-01-22 Teleprompter Corp Coaxial cable splice
CH547028A (de) * 1972-06-16 1974-03-15 Bbc Brown Boveri & Cie Glimmschutzfolie, verfahren zu ihrer herstellung sowie ihre verwendung bei hochspannungswicklungen.
US3801843A (en) 1972-06-16 1974-04-02 Gen Electric Rotating electrical machine having rotor and stator cooled by means of heat pipes
US3792399A (en) 1972-08-28 1974-02-12 Nasa Banded transformer cores
US3778891A (en) 1972-10-30 1973-12-18 Westinghouse Electric Corp Method of securing dynamoelectric machine coils by slot wedge and filler locking means
US3932791A (en) 1973-01-22 1976-01-13 Oswald Joseph V Multi-range, high-speed A.C. over-current protection means including a static switch
CA1028440A (en) * 1973-02-26 1978-03-21 Uop Inc. Polymer compositions with treated filler
SE371348B (zh) 1973-03-22 1974-11-11 Asea Ab
US3781739A (en) 1973-03-28 1973-12-25 Westinghouse Electric Corp Interleaved winding for electrical inductive apparatus
CH549467A (de) * 1973-03-29 1974-05-31 Micafil Ag Verfahren zur herstellung eines schichtpressstoffes.
US3881647A (en) 1973-04-30 1975-05-06 Lebus International Inc Anti-slack line handling device
US3828115A (en) * 1973-07-27 1974-08-06 Kerite Co High voltage cable having high sic insulation layer between low sic insulation layers and terminal construction thereof
US3947278A (en) * 1973-12-19 1976-03-30 Universal Oil Products Company Duplex resistor inks
US3912957A (en) * 1973-12-27 1975-10-14 Gen Electric Dynamoelectric machine stator assembly with multi-barrel connection insulator
CA1016586A (en) * 1974-02-18 1977-08-30 Hubert G. Panter Grounding of outer winding insulation to cores in dynamoelectric machines
DE2430792C3 (de) * 1974-06-24 1980-04-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Starkstromkabel mit Kunststoffisolierung und äußerer Leitschicht
US3902000A (en) 1974-11-12 1975-08-26 Us Energy Termination for superconducting power transmission systems
US3943392A (en) 1974-11-27 1976-03-09 Allis-Chalmers Corporation Combination slot liner and retainer for dynamoelectric machine conductor bars
CH579844A5 (zh) * 1974-12-04 1976-09-15 Bbc Brown Boveri & Cie
US4132914A (en) * 1975-04-22 1979-01-02 Khutoretsky Garri M Six-phase winding of electric machine stator
US3993860A (en) * 1975-08-18 1976-11-23 Samuel Moore And Company Electrical cable adapted for use on a tractor trailer
US4321426A (en) * 1978-06-09 1982-03-23 General Electric Company Bonded transposed transformer winding cable strands having improved short circuit withstand
JPS6044764B2 (ja) * 1978-11-09 1985-10-05 株式会社フジクラ ケ−ブル導体製造方法
US4207482A (en) * 1978-11-14 1980-06-10 Westinghouse Electric Corp. Multilayered high voltage grading system for electrical conductors
US4262209A (en) * 1979-02-26 1981-04-14 Berner Charles A Supplemental electrical power generating system
DE2920477A1 (de) * 1979-05-21 1980-12-04 Kabel Metallwerke Ghh Vorgefertigte dreiphasige wechselstromwicklung fuer einen linearmotor
JPS5675411U (zh) * 1979-11-15 1981-06-19
SU961048A1 (ru) * 1979-12-06 1982-09-23 Научно-Исследовательский Сектор Всесоюзного Ордена Ленина Проектно-Изыскательского И Научно-Исследовательского Института "Гидропроект" Им.С.Я.Жука Статор генератора
EP0033847B1 (de) * 1980-02-11 1985-05-02 Siemens Aktiengesellschaft Turbinensatz mit einem ein Netz konstanter Frequenz speisenden Generator
DE3016990A1 (de) * 1980-05-02 1981-11-12 Kraftwerk Union AG, 4330 Mülheim Vorrichtung zum fixieren von wicklungsstaeben in nuten elektrischer maschinen, insbesondere turbogeneratoren
CA1140198A (en) * 1980-05-23 1983-01-25 National Research Council Of Canada Laser triggered high voltage rail gap switch
DE3031866A1 (de) * 1980-08-23 1982-04-01 Brown, Boveri & Cie Ag, 6800 Mannheim Leiterstab fuer elektrische maschine
US4384944A (en) * 1980-09-18 1983-05-24 Pirelli Cable Corporation Carbon filled irradiation cross-linked polymeric insulation for electric cable
US4330726A (en) * 1980-12-04 1982-05-18 General Electric Company Air-gap winding stator construction for dynamoelectric machine
US4361723A (en) * 1981-03-16 1982-11-30 Harvey Hubbell Incorporated Insulated high voltage cables
US4401920A (en) * 1981-05-11 1983-08-30 Canadian Patents & Development Limited Laser triggered high voltage rail gap switch
US4365178A (en) * 1981-06-08 1982-12-21 General Electric Co. Laminated rotor for a dynamoelectric machine with coolant passageways therein
SE426895B (sv) * 1981-07-06 1983-02-14 Asea Ab Skyddsanordning for en seriekondensator i ett hogspenningsnet
US4520287A (en) * 1981-10-27 1985-05-28 Emerson Electric Co. Stator for a multiple-pole dynamoelectric machine and method of fabricating same
DK474682A (da) * 1981-10-27 1983-04-28 Raychem Sa Nv Roermuffe og dens anvendelse
US4437464A (en) * 1981-11-09 1984-03-20 C.R. Bard, Inc. Electrosurgical generator safety apparatus
CA1222788A (en) * 1982-05-14 1987-06-09 Roderick S. Taylor Uv radiation triggered rail-gap switch
US4473765A (en) * 1982-09-30 1984-09-25 General Electric Company Electrostatic grading layer for the surface of an electrical insulation exposed to high electrical stress
US4508251A (en) * 1982-10-26 1985-04-02 Nippon Telegraph And Telephone Public Corp. Cable pulling/feeding apparatus
US4510077A (en) * 1983-11-03 1985-04-09 General Electric Company Semiconductive glass fibers and method
US4723083A (en) * 1983-11-25 1988-02-02 General Electric Company Electrodeposited mica on coil bar connections and resulting products
US4724345A (en) * 1983-11-25 1988-02-09 General Electric Company Electrodepositing mica on coil connections
US4622116A (en) * 1983-11-25 1986-11-11 General Electric Company Process for electrodepositing mica on coil or bar connections and resulting products
GB2150153B (en) * 1983-11-25 1986-09-10 Gen Electric Electrodeposition of mica on coil or bar connections
SE452823B (sv) * 1984-03-07 1987-12-14 Asea Ab Seriekondensatorutrustning
US5066881A (en) * 1984-08-23 1991-11-19 General Electric Company Semi-conducting layer for insulated electrical conductors
US4853565A (en) * 1984-08-23 1989-08-01 General Electric Company Semi-conducting layer for insulated electrical conductors
US5036165A (en) * 1984-08-23 1991-07-30 General Electric Co. Semi-conducting layer for insulated electrical conductors
US4761602A (en) * 1985-01-22 1988-08-02 Gregory Leibovich Compound short-circuit induction machine and method of its control
US4654551A (en) * 1985-05-20 1987-03-31 Tecumseh Products Company Permanent magnet excited alternator compressor with brushless DC control
US4656379A (en) * 1985-12-18 1987-04-07 The Garrett Corporation Hybrid excited generator with flux control of consequent-pole rotor
US4771168A (en) * 1987-05-04 1988-09-13 The University Of Southern California Light initiated high power electronic switch
US4890040A (en) * 1987-06-01 1989-12-26 Gundersen Martin A Optically triggered back-lighted thyratron network
US4859989A (en) * 1987-12-01 1989-08-22 W. L. Gore & Associates, Inc. Security system and signal carrying member thereof
US4982147A (en) * 1989-01-30 1991-01-01 State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University Power factor motor control system
CA2027553C (en) * 1989-02-14 1996-09-17 Kazuo Sawada Insulated wire for high-temperature environment
US4949001A (en) * 1989-07-21 1990-08-14 Campbell Steven R Partial discharge detection method and apparatus
SE465240B (sv) * 1989-12-22 1991-08-12 Asea Brown Boveri Oeverspaenningsskydd foer seriekondensatorutrustning
US5030813A (en) * 1990-02-06 1991-07-09 Pulsair Anstalt Corporation Welding apparatus and transformer therefor
TW215446B (zh) * 1990-02-23 1993-11-01 Furukawa Electric Co Ltd
US5171941A (en) * 1990-03-30 1992-12-15 The Furukawa Electric Co., Ltd. Superconducting strand for alternating current
JP2814687B2 (ja) * 1990-04-24 1998-10-27 日立電線株式会社 水密型ゴム・プラスチック絶縁ケーブル
NL9002005A (nl) * 1990-09-12 1992-04-01 Philips Nv Transformator.
US5067040A (en) * 1990-09-24 1991-11-19 Joel Fallik Expandable refrigerated enclosure for computer boards
DE4112161C2 (de) * 1991-04-13 1994-11-24 Fraunhofer Ges Forschung Gasentladungseinrichtung
US5499178A (en) * 1991-12-16 1996-03-12 Regents Of The University Of Minnesota System for reducing harmonics by harmonic current injection
FR2692693A1 (fr) * 1992-06-23 1993-12-24 Smh Management Services Ag Dispositif de commande d'un moteur asynchrone.
US5449861A (en) * 1993-02-24 1995-09-12 Vazaki Corporation Wire for press-connecting terminal and method of producing the conductive wire
US5399941A (en) * 1993-05-03 1995-03-21 The United States Of America As Represented By The Secretary Of The Navy Optical pseudospark switch
FR2707448B1 (fr) * 1993-07-06 1995-09-15 Cableco Sa Générateur d'alimentation électrique d'une lampe à arc .
US5550410A (en) * 1994-08-02 1996-08-27 Titus; Charles H. Gas turbine electrical power generation scheme utilizing remotely located fuel sites
US5533658A (en) * 1994-11-10 1996-07-09 Production Tube, Inc. Apparatus having replaceable shoes for positioning and gripping tubing
EP0729217B1 (de) * 1995-02-21 2000-01-12 Siemens Aktiengesellschaft Hybriderregte elektrische Maschine
US5663605A (en) * 1995-05-03 1997-09-02 Ford Motor Company Rotating electrical machine with electromagnetic and permanent magnet excitation
FR2745117B1 (fr) * 1996-02-21 2000-10-13 Whitaker Corp Cable flexible et souple a helices espacees

Also Published As

Publication number Publication date
EE03408B1 (et) 2001-04-16
TR199802471T2 (xx) 1999-03-22
US6891303B2 (en) 2005-05-10
CN1220043A (zh) 1999-06-16
AU2988697A (en) 1998-01-05
HK1021085A1 (en) 2000-05-26
NZ333599A (en) 2000-05-26
JP2000511392A (ja) 2000-08-29
PE82798A1 (es) 1998-11-24
EE9800415A (et) 1999-06-15
PL330225A1 (en) 1999-05-10
BR9709619A (pt) 1999-08-10
EP0888661B1 (en) 2003-11-19
UA45452C2 (uk) 2002-04-15
WO1997045926A3 (en) 1998-01-22
KR20000016037A (ko) 2000-03-25
WO1997045926A2 (en) 1997-12-04
CO4650249A1 (es) 1998-09-03
ATE254815T1 (de) 2003-12-15
CN1101988C (zh) 2003-02-19
EP0888661A2 (en) 1999-01-07
US20020047439A1 (en) 2002-04-25
NO985553L (no) 1998-11-27
DE69726267T2 (de) 2004-09-09
DE69726267D1 (de) 2003-12-24
AR007339A1 (es) 1999-10-27
CZ385898A3 (cs) 1999-05-12
AU718681B2 (en) 2000-04-20
CA2255739A1 (en) 1997-12-04
RU2211518C2 (ru) 2003-08-27
NO985553D0 (no) 1998-11-27

Similar Documents

Publication Publication Date Title
TW419878B (en) An electric high voltage ac machine
US7529073B2 (en) Protecting medium voltage inductive coupled device from electrical transients
EP1193828B1 (en) Power system having stator coils for grading voltage between inner vent tubes and coil strands and associated methods
Candela et al. A comparison of special bonding techniques for transmission and distribution cables under normal and fault conditions
MXPA01000122A (es) Eliminador total transitorio electrico.
Walsh A review of lightning protection and grounding practices
Pillai et al. Grounding and ground fault protection of multiple generator installations on medium-voltage industrial and commercial systems-Part 2: Grounding Methods Working Group report
Ogbuefi Effectiveness of Neutral Grounding on Power System Application
US1865409A (en) Protective apparatus
EP2287990A1 (en) A device protecting against high frequency overvoltage
CN210608524U (zh) 一种高压电缆金属护套环流抑制系统
CN110165646A (zh) 一种电缆屏蔽层电流泄放装置
McCann et al. Lightning protection for rotating machines
Harder et al. Protection of pilot-wire circuits
EP0901706B1 (en) A method and a device for reducing third harmonic phenomena in a rotating electric alternating current machine
Sutherland Snubber circuit design for transformers in urban high rise office building
Bronzeado et al. Sympathetic interaction between transformers-A potential source of disturbances in electric power system
Rudse et al. Protection oi rotating AC machines against traveling wave voltages
KR200212603Y1 (ko) 피뢰기 장치
SE512299C2 (sv) Förfarande och anordning för seriekompensering av elektrisk växelströmsmaskin samt maskin försedd med dylik anordning.
Priedite-Razgale et al. DEVELOPMENT OF ALGORITHM AND SOFTWARE “MVES-GS 2012” FOR SELECTION OF NEUTRAL GROUNDING TYPE IN MEDIUM VOLTAGE NETWORKS
Larry Pryor et al. The Application and Selection of Lightning Arresters
Mozina et al. GROUNDING AND GROUND FAULT PROTECTION OF MULTIPLE GENERATOR INSTALLATIONS ON MEDIUM-VOLTAGE INDUSTRIAL AND COMMERCIAL POWER SYSTEMS PART 4-CONCLUSION AND BIBLIOGRAPHY
SE510631C2 (sv) Förfarande och anordning för att minska trdjetonsfenomen vid direktanslutning av växelströmsmaskiner

Legal Events

Date Code Title Description
GD4A Issue of patent certificate for granted invention patent
MM4A Annulment or lapse of patent due to non-payment of fees