TW201835948A - Stationary induction apparatus - Google Patents
Stationary induction apparatus Download PDFInfo
- Publication number
- TW201835948A TW201835948A TW107106507A TW107106507A TW201835948A TW 201835948 A TW201835948 A TW 201835948A TW 107106507 A TW107106507 A TW 107106507A TW 107106507 A TW107106507 A TW 107106507A TW 201835948 A TW201835948 A TW 201835948A
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- Taiwan
- Prior art keywords
- winding
- dielectric material
- high dielectric
- insulating
- wedge
- Prior art date
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- 230000006698 induction Effects 0.000 title abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 87
- 239000003989 dielectric material Substances 0.000 claims abstract description 41
- 239000004020 conductor Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000002826 coolant Substances 0.000 claims abstract description 3
- 239000012212 insulator Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 17
- 238000009413 insulation Methods 0.000 abstract description 16
- 238000001816 cooling Methods 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011800 void material Substances 0.000 description 17
- 125000006850 spacer group Chemical group 0.000 description 16
- 238000000576 coating method Methods 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 239000000123 paper Substances 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- WXANAQMHYPHTGY-UHFFFAOYSA-N cerium;ethyne Chemical compound [Ce].[C-]#[C] WXANAQMHYPHTGY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- -1 enamel Substances 0.000 description 1
- 229940044949 eucalyptus oil Drugs 0.000 description 1
- 239000010642 eucalyptus oil Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229940042472 mineral oil Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
- Coils Of Transformers For General Uses (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
Description
[0001] 本發明，是關於形成於靜止感應器之繞線導體周邊之楔狀空隙部的電場緩和構造。[0001] The present invention relates to an electric field relaxation structure formed in a wedge-shaped gap portion around a winding conductor of a stationary inductor.
[0002] 由於近年的電力需求高漲，故變壓器有高壓化大容量化的傾向。另一方面，由於人口向都市集中，對於變壓器小型化的需求亦昇高。作為變壓器小型化的方法之一，是縮短絕緣距離。為了縮短絕緣距離，對於有關於絕緣構造的講究、或是絕緣材料的高功能化進行檢討。 [0003] 在以液體或是氣體作為絕緣及液體媒體之變壓器內部的絕緣構造中，一般而言，形成在固體絕緣物之接觸部的楔狀空隙會成為絕緣上的弱點。此乃因為在楔狀的空隙中，相較於固體絕緣物，電場會集中在相對電容率較小的液體或氣體之故。 [0004] 又，在油浸式變壓器所使用的絕緣油是經過精製處理，再者，在變壓器的製作階段中，進行防塵或者異物管理是周知的事實。然而，微細固態粒子混入在油中是無法避免的。 [0005] 楔狀的空隙部，由於油的流動相較於周圍較為淤滯，故混入至絕緣油中的異物容易滯留、沈澱。因此，變壓器內的絕緣破壞是大多以楔狀的空隙部為起點而發生。 [0006] 於專利文獻1所記載的變壓器，是以彈性體構成絕緣物的一部分，藉由將楔狀的空隙部埋入其中，來緩和電場集中。於專利文獻2所記載的變壓器，是將非線性阻抗材料塗佈或含浸於繞線被覆，來緩和楔狀之空隙部中的電場集中。 [先前技術文獻] [專利文獻] [0007] [專利文獻1] 日本特開平6-267761號公報 [專利文獻2] 日本特開2013-254771號公報[0002] In recent years, power demand has increased, and transformers tend to have higher voltage and larger capacity. On the other hand, as the population is concentrated in the city, the demand for transformer miniaturization is also increasing. One of the methods for miniaturizing a transformer is to shorten the insulation distance. In order to shorten the insulation distance, it is necessary to review the insulation structure or the high functionality of the insulation material. [0003] In an insulating structure inside a transformer in which a liquid or a gas is used as an insulating and liquid medium, generally, a wedge-shaped void formed at a contact portion of a solid insulator becomes a weak point in insulation. This is because in a wedge-shaped gap, the electric field concentrates on a liquid or gas having a relatively small permittivity compared to a solid insulator. Further, the insulating oil used in the oil-immersed transformer is subjected to a refining treatment, and further, it is known that dust or foreign matter is managed in the production stage of the transformer. However, the incorporation of fine solid particles into oil is unavoidable. [0005] In the wedge-shaped void portion, since the flow of the oil is stagnant compared to the surroundings, the foreign matter mixed into the insulating oil is liable to stay and precipitate. Therefore, the dielectric breakdown in the transformer is often caused by the wedge-shaped void portion as a starting point. [0006] The transformer described in Patent Document 1 is a part of an insulator composed of an elastomer, and the electric field is concentrated by embedding a wedge-shaped void portion therein. In the transformer described in Patent Document 2, the nonlinear impedance material is coated or impregnated with the winding to reduce the electric field concentration in the wedge-shaped void portion. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 6-267761 (Patent Document 2) Japanese Laid-Open Patent Publication No. 2013-254771
[發明所要解決的問題] [0008] 在專利文獻1中，是以彈性體構成絕緣物的一部分，藉由將楔狀的空隙部埋入其中，來緩和電場集中。但是，在如此的構造中，由於是以彈性體將繞線整體予以覆蓋，所以有繞線的冷卻無法充分冷卻的可能性。再者，依照繞線構造，彈性體無法完全充滿楔狀空隙，而有更加造成絕緣上之弱點的可能性。 [0009] 在專利文獻2中，是將非線性阻抗材料塗佈或含浸於繞線被覆，來緩和楔狀之空隙部中的電場集中。但是，由於是以環氧樹脂作為母材的非線性阻抗材料塗佈或含浸於繞線被覆整體的構造，所以會阻礙繞線的冷卻。因而使繞線周邊的溫度上昇而促進絕緣物的劣化。此外，由於除了以往的繞線作業之外，還要再加上環氧樹脂之塗佈或含浸、硬化的製程，所以 作業工時及時間增大。 [0010] 本發明，是有鑑於以上的缺點而研創的，其目的在於緩和形成在變壓器內部之楔狀空隙部的電場集中，並且藉由確保繞線的冷卻，使變壓器的絕緣信賴性提昇。 [用以解決問題的手段] [0011] 為了達成上述的目的，本發明，是將鐵芯腳、及繞線、以及作為絕緣和冷卻媒體的氣體或是液體一起收納於桶槽內的靜止感應器，其中上述繞線，是將以絕緣紙所被覆的導體成同心狀地捲繞於上述鐵芯腳而構成，其特徵為：在上述繞線內鄰接的上述導體之間，設置有至少比上述絕緣紙具有更高相對電容率的含有高介電材料構件。 [發明效果] [0012] 依據本發明的變壓器，可以緩和在變壓器繞線周邊所形成之楔狀空隙部的電場集中，而可以抑制以楔狀空隙部作為起點的絕緣破壞。又，藉由確保繞線的冷卻，來抑制繞線周邊之絕緣物的熱劣化，而可以長期性地確保絕緣信賴性。[Problems to be Solved by the Invention] In Patent Document 1, a portion of an insulator is formed of an elastic body, and a wedge-shaped void portion is buried therein to alleviate electric field concentration. However, in such a configuration, since the entire winding is covered with an elastic body, there is a possibility that the cooling of the winding cannot be sufficiently cooled. Moreover, according to the winding structure, the elastic body cannot completely fill the wedge-shaped void, and there is a possibility that the insulation is more weak. [0009] In Patent Document 2, a nonlinear impedance material is applied or impregnated with a winding to reduce electric field concentration in a wedge-shaped void portion. However, since the nonlinear resistance material which is an epoxy resin as a base material is coated or impregnated into the entire structure of the winding, the cooling of the winding is hindered. Therefore, the temperature around the winding is increased to promote deterioration of the insulator. In addition, in addition to the conventional winding work, a coating process of epoxy resin or a process of impregnation and hardening is added, so that the working time and time are increased. The present invention has been made in view of the above disadvantages, and an object thereof is to alleviate the electric field concentration of the wedge-shaped void portion formed inside the transformer, and to improve the insulation reliability of the transformer by ensuring cooling of the winding. [Means for Solving the Problem] [0011] In order to achieve the above object, the present invention is a static induction in which a core leg, a winding, and a gas or a liquid as an insulating and cooling medium are housed in a tub. The winding is formed by winding a conductor covered with insulating paper in a concentric manner around the core leg, and is characterized in that at least a ratio is provided between the adjacent conductors in the winding. The above insulating paper has a higher relative permittivity and contains a high dielectric material member. [Effect of the Invention] According to the transformer of the present invention, the electric field concentration of the wedge-shaped void portion formed around the winding of the transformer can be alleviated, and the dielectric breakdown using the wedge-shaped void portion as a starting point can be suppressed. Moreover, by ensuring the cooling of the winding, the thermal deterioration of the insulator around the winding is suppressed, and the insulation reliability can be ensured for a long period of time.
[0014] 以下，對於本發明的實施例參照圖面進行說明。 [實施例1] [0015] 第1圖是顯示作為靜止感應電器之一例的油浸式變壓器之構成的概略圖。於同圖中，鐵芯1及繞線2，是被收納在桶槽3，其中並封入有作為絕緣與冷卻該等構件之媒體的絕緣媒體4(例如絕緣油)。 [0016] 第2圖，是模式性地表示在第1圖的油浸式變壓器中之繞線2的結線的圖面。於同圖中，以鐵芯腳5為中心，同心圓狀地配置有低壓繞線6與高壓繞線7。在此，係具有高壓繞線7的高壓繞線線路端點8、以及低壓繞線6的低壓繞線線路端點11。高壓繞線7，是分開成上下的構造，上下的高壓繞線7是藉由高壓繞線連接線10，而連接於中性點端子9。 [0017] 第3圖，是模式性地顯示在第2圖所圖示之高壓繞線7的斷面的圖面，顯示與繞線軸向垂直之一斷面。如同圖所示，具備：具有預定之軸向長度的內徑側絕緣筒12、以及具有與內徑側絕緣筒12同等長度，且複數個配置於其圓周方向的內徑側垂直絕緣物間隔片14。於內徑側絕緣筒12的外周，由絕緣物所被覆的高壓繞線7是以鐵芯腳(圖示省略)為中心成同心圓狀地捲繞預定的圈數，而形成圓板線圈17。於圓板線圈17的外徑側，在與內徑側垂直絕緣物間隔片14對應的位置配置有外徑側垂直絕緣物間隔片15，再於其外徑側配置有外徑側絕緣筒13。在此，在圓板線圈17的圓周上藉由內徑側垂直絕緣物間隔片14與外徑側垂直絕緣物間隔片15所保持的位置上，夾隔著水平絕緣物間隔片16，藉由將圓板線圈17於軸向上積層複數個，而構成圓板繞線。又，作為其他的繞線形狀，可以是螺旋繞線或圓筒繞線等。 [0018] 第4圖，是顯示在第3圖中之A-A’斷面之一部分的圖面，為繞線軸向之一斷面。於同圖中，對於與第3圖相同的部分標記相同的參照符號，並省略說明。高壓繞線7是由繞線導體20、以及設在繞線導體20之周圍的絕緣被覆21所構成。通常，在油浸式變壓器中，考量繞線導體20的冷卻，是使用絕緣紙作為絕緣被覆21。又，在鄰接的繞線導體20之間，形成有楔狀空隙22。 [0019] 第5圖，是將第4圖中，形成於鄰接的繞線導體20之間的楔狀空隙22予以放大後的立體圖。於同圖中，對於與第3圖相同的部分標記相同的參照符號，並省略說明。在此，形成於鄰接的繞線導體20之間的楔狀的空隙為匝間楔形23，形成於繞線導體20與水平絕緣物間隔片16之間的楔狀的空隙為線圈間楔形24。 [0020] 第6圖，是將第5圖之匝間楔形23予以放大後的圖面，其顯示形成於繞線導體20與匝間楔形23周邊的等電位線30。通常，對於絕緣被覆21是使用絕緣紙(在礦物油中的相對電容率為3.5)，對於周圍的絕緣媒體4是使用礦物油(相對電容率為2.2)。作為絕緣被覆21，可使用為絕緣紙的牛皮紙或醯胺(aramid)紙，作為其他的絕緣材料，可使用琺瑯、清漆(varnish)、絕緣膜等。又，作為絕緣媒體4，除了礦物油之外，可使用矽油，六氟化硫氣體。在匝間楔形23周邊中，相較於使用在絕緣被覆21的固體絕緣物，由於使用相對電容率較小的絕緣媒體4，故等電位線30成為較密。亦即，在匝間楔形23電場集中而形成高電場部31。 [0021] 第7圖，是在實施例1所採用之高壓繞線的軸向斷面圖，是與第3圖的A-A’之該斷面相對應者。於同圖中，對於與第4圖相同的部分標記相同的參照符號，並省略說明。在本實施例中的繞線構造中，例如是將含有高介電材料構件25與繞線導體20一起捲繞而構成。 [0022] 第8圖，是顯示實施例1所採用之含有高介電材料構件25之構成的立體圖。例如，將高介電材料26塗佈或是含浸在光面紙等之絕緣構件27的周邊。亦可將含有高介電材料的薄膜片捲繞在絕緣構件27周邊而構成。在此，高介電材料26，是至少比使用於絕緣被覆21之固體絕緣物具有較高的相對電容率的材料。作為高介電材料26，例如是氧化鋅、氧化鋇、鈦酸鋇、二氧化鈦、碳化矽、或是氧化鋁之所謂高介電材料粒子、或是將此等之混合物與母材混合者。作為母材，考量對絕緣構件27的塗佈或含浸，例如，可使用環氧樹脂等。藉由調整高介電材料粒子對環氧樹脂的混合比，可以調整高介電材料26的特性。為了防止高介電材料26從絕緣構件27剝離，而成為異物混入於變壓器內，可在絕緣構件27與高介電材料26的周邊施以絕緣被覆21。 [0023] 第9圖，是於第7圖中，將形成於鄰接之繞線導體20之間的楔狀空隙22予以放大後的立體圖。於同圖中，對於與第7圖相同的部分標記相同的參照符號，並省略說明。於繞線導體20之間插入有含有高介電材料構件25。 [0024] 第10圖，是將在第9圖中之匝間楔形23予以放大後的圖面，並圖示在鄰接之繞線導體20與匝間楔形23周邊所形成的等電位線30者。藉由將含有高介電材料構件25插入於繞線導體20之間，使在匝間楔形23周邊中的等電位線成為較疏。亦即，可緩和匝間楔形23周邊的電場。藉由採用本實施例，可以比沒有使用含有高介電材料構件25之第6圖的構造，更加緩和形成在繞線導體20之間的楔狀空隙22周邊的電場集中。 [0025] 又，繞線導體20的絕緣被覆21或是絕緣媒體4之所謂絕緣物是因受熱而劣化。在如第7圖所示之本實施例中，繞線導體20與絕緣媒體4的接觸表面積，由於與在第4圖所示之以往的變壓器構造幾乎沒有變化，故藉由採用本實施例，可以確保與以往相同程度之繞線導體20的冷卻。因此，在本實施例中，依變壓器內部的溫度分布是與以往為相同程度，因此對於絕緣物的劣化是同以往程度。 [0026] 如以上說明，依據實施例1，由於形成於繞線導體20之間的楔狀空隙22的電場集中受到緩和，而可以抑制以楔狀空隙22作為起點的絕緣破壞。除此之外，於本實施例的構造中，由於可以確保與以往構造相同程度的冷卻性能，故可以抑制因熱所導致之絕緣物的劣化，而可以提供絕緣信賴性高的機器。 [實施例2] [0027] 第11圖，是模式性地顯示在實施例2中之高壓繞線7的徑向斷面的圖面，並顯示於繞線軸向垂直的斷面。於同圖中，具備：具有預定之軸向長度的內徑側絕緣筒12、以及具有與內徑側絕緣筒12同等長度，且複數個配置於其圓周方向的內徑側垂直絕緣物間隔片14。於內徑側絕緣筒12的外周，由絕緣物所被覆的高壓繞線7及用以改善耐衝擊電壓特性的靜電屏蔽40是以鐵芯腳(圖示省略)為中心成同心圓狀地捲繞預定的圈數，而形成圓板線圈17。於圓板線圈17的外徑側，在與內徑側垂直絕緣物間隔片14對應的位置配置有外徑側垂直絕緣物間隔片15，再於其外徑側配置有外徑側絕緣筒13。在此，在圓板線圈17的圓周上藉由內徑側垂直絕緣物間隔片14與外徑側垂直絕緣物間隔片15所保持的位置上，夾隔著水平絕緣物間隔片16，藉由將圓板線圈17於軸向上積層複數個，而構成圓板繞線。 [0028] 第12圖，是第11圖所示之線圈之軸向斷面的一部分的圖面，特別是顯示將高壓繞線線路端8的周邊予以放大後的圖面。於同圖中，具有高壓繞線線路端8、繞線導體20，其中於繞線導體20的周圍具有作為繞線導體20之被覆的絕緣被覆21。在異常電壓從高壓繞線線路端8侵入之情形時，繞線內的電位分布會振動，於高壓繞線線路端8過渡性之電位的傾斜變大。其結果，在該部產生高電場。為了抑制此點，故在繞線導體20之間插入有靜電屏蔽40。 [0029] 第13圖，是顯示在實施例2中之將高介電材料塗佈或含浸在靜電屏蔽周邊所構成之含有高介電材料構件25的構成的立體圖。將至少比在繞線導體20之絕緣被覆21所使用的固體絕緣物具有較高相對電容率的材料塗佈或含浸於靜電屏蔽40的周邊而構成含有高介電材料構件25。亦可將含有高介電材料26的薄膜片捲繞於靜電屏蔽40的周邊而構成。作為高介電材料26，例如是氧化鋅、氧化鋇、鈦酸鋇、二氧化鈦、碳化矽、或是氧化鋁之所謂高介電材料粒子、或是將此等之混合物與母材混合者。作為母材，考量對靜電屏蔽40的塗佈或含浸，例如，可使用環氧樹脂等。藉由此方法所生成的高介電材料26，藉由調整高介電材料粒子對環氧樹脂的混合比，可以調整高介電材料26的特性。為了防止高介電材料26從靜電屏蔽40剝離，而成為異物混入於變壓器內，可在靜電屏蔽40與高介電材料26的周邊施以絕緣被覆21。 [0030] 藉由採用本構成，可以緩和位在第12圖所示之繞線導體20之間所形成之楔狀空隙22中的電場集中。又，在本實施形態的構造下，由於可以確保與以往構造相同程度的冷卻性能，故可以抑制因熱所導致之絕緣物的劣化。再者，藉由將高介電材料26塗佈於靜電屏蔽40，由於可以使匝間的靜電容量增加，故相較於以往構造可以增大取得異常電壓侵入時之電位分布平滑化的效果。由以上的說明，藉由採用本實施例，可以提供絕緣信賴性高的機器。 [0031] 又，本發明並不受上述的實施例所限定者，可包含各式各樣的變形例。上述的實施例是使本發明可易於瞭解地進行了說明，未必是受到具備有所說明之全部的構成所限定者。又，亦能夠將某實施例之構成的一部分置換於其他之實施例的構成、亦能夠將其他之實施例的構成加增於某實施例的構成。又，亦能夠針對各實施例之構成的一部分，進行其他之構成的追加、削除、置換。[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Embodiment 1] [0015] Fig. 1 is a schematic view showing a configuration of an oil immersed transformer as an example of a stationary induction device. In the same figure, the core 1 and the winding 2 are housed in the tub 3, and an insulating medium 4 (for example, insulating oil) as a medium for insulating and cooling the members is enclosed therein. 2 is a view schematically showing a knot of a winding 2 in the oil immersed transformer of FIG. 1 . In the same figure, the low-voltage winding 6 and the high-voltage winding 7 are concentrically arranged with the core leg 5 as the center. Here, there is a high voltage winding line end point 8 having a high voltage winding 7, and a low voltage winding line end point 11 of the low voltage winding 6. The high-voltage winding 7 is divided into upper and lower structures, and the upper and lower high-voltage windings 7 are connected to the neutral point terminal 9 by the high-voltage winding connecting wire 10. 3 is a view schematically showing a cross section of the high-voltage winding 7 illustrated in FIG. 2, and showing a cross section perpendicular to the winding axial direction. As shown in the figure, the inner diameter side insulating cylinder 12 having a predetermined axial length and the inner diameter side vertical insulating spacer having the same length as the inner diameter side insulating cylinder 12 and disposed in the circumferential direction thereof are provided 14. On the outer circumference of the inner-diameter-side insulating cylinder 12, the high-voltage winding 7 covered with the insulator is wound concentrically around the core leg (not shown) by a predetermined number of turns, thereby forming a circular coil 17 . On the outer diameter side of the disk coil 17, the outer diameter side vertical insulator spacer 15 is disposed at a position corresponding to the inner diameter side vertical insulator spacer 14, and the outer diameter side insulating cylinder 13 is disposed on the outer diameter side thereof. . Here, at the position where the inner diameter side vertical insulator spacer 14 and the outer diameter side vertical insulator spacer 15 are held on the circumference of the disk coil 17, the horizontal insulator spacer 16 is interposed therebetween. The circular plate coil 17 is laminated in the axial direction to form a circular plate winding. Further, the other winding shape may be a spiral winding or a cylindrical winding. 4 is a view showing a portion of the A-A' cross section in FIG. 3, which is a section of the winding axial direction. [0018] FIG. In the same drawing, the same portions as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted. The high voltage winding 7 is composed of a winding conductor 20 and an insulating coating 21 provided around the winding conductor 20. Generally, in an oil-immersed transformer, in consideration of cooling of the wound conductor 20, insulating paper is used as the insulating coating 21. Further, a wedge-shaped gap 22 is formed between the adjacent winding conductors 20. Fig. 5 is a perspective view showing the wedge-shaped void 22 formed between the adjacent wound conductors 20 in Fig. 4 in an enlarged manner. In the same drawing, the same portions as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted. Here, the wedge-shaped gap formed between the adjacent winding conductors 20 is the inter-turn wedge shape 23, and the wedge-shaped gap formed between the winding conductor 20 and the horizontal insulator spacer 16 is the inter-coil wedge shape 24. 6 is an enlarged plan view of the inter-turn wedge 23 of FIG. 5, showing the equipotential lines 30 formed around the winding conductor 20 and the meandering wedge 23. Generally, insulating paper (the relative permittivity in mineral oil is 3.5) is used for the insulating coating 21, and mineral oil (relative permittivity is 2.2) is used for the surrounding insulating medium 4. As the insulating coating 21, kraft paper or aramid paper which is insulating paper can be used, and as another insulating material, enamel, varnish, insulating film or the like can be used. Further, as the insulating medium 4, in addition to mineral oil, eucalyptus oil or sulfur hexafluoride gas can be used. In the periphery of the inter-turn wedge 23, the equipotential line 30 is denser than the insulating medium 4 having a relatively small permittivity compared to the solid insulator used in the insulating coating 21. That is, the electric field is concentrated in the meandering wedge 23 to form the high electric field portion 31. Fig. 7 is an axial sectional view of the high-voltage winding used in the first embodiment, corresponding to the section of A-A' of Fig. 3. In the same drawing, the same portions as those in FIG. 4 are denoted by the same reference numerals, and the description thereof is omitted. In the winding structure in the present embodiment, for example, the high dielectric material member 25 and the winding conductor 20 are wound together. 8 is a perspective view showing a configuration of the high dielectric material member 25 used in the first embodiment. For example, the high dielectric material 26 is coated or impregnated around the periphery of the insulating member 27 of glossy paper or the like. A film sheet containing a high dielectric material may be wound around the periphery of the insulating member 27. Here, the high dielectric material 26 is a material having a higher relative permittivity than at least the solid insulator used for the insulating coating 21. The high dielectric material 26 is, for example, a so-called high dielectric material particle of zinc oxide, cerium oxide, barium titanate, titanium oxide, cerium carbide or aluminum oxide, or a mixture of such a mixture with a base material. As the base material, application or impregnation of the insulating member 27 is considered, and for example, an epoxy resin or the like can be used. The characteristics of the high dielectric material 26 can be adjusted by adjusting the mixing ratio of the high dielectric material particles to the epoxy resin. In order to prevent the high dielectric material 26 from being peeled off from the insulating member 27 and foreign matter is mixed in the transformer, the insulating coating 21 may be applied to the periphery of the insulating member 27 and the high dielectric material 26. Fig. 9 is a perspective view showing the wedge-shaped void 22 formed between the adjacent wound conductors 20 in Fig. 7 in an enlarged manner. In the same drawing, the same portions as those in FIG. 7 are denoted by the same reference numerals, and the description thereof will be omitted. A high dielectric material member 25 is interposed between the wound conductors 20. 10 is an enlarged plan view of the inter-turn wedge 23 in FIG. 9, and shows an equipotential line 30 formed around the adjacent wound conductor 20 and the inter-turn wedge 23. . By inserting the member containing high dielectric material 25 between the wound conductors 20, the equipotential lines in the periphery of the inter-turn wedge 23 are made sparse. That is, the electric field around the meandering wedge 23 can be alleviated. By using this embodiment, it is possible to more moderate the electric field concentration around the wedge-shaped void 22 formed between the wound conductors 20 than the configuration of the sixth figure including the high dielectric material member 25. [0025] Further, the insulating coating 21 of the wound conductor 20 or the so-called insulator of the insulating medium 4 is deteriorated by heat. In the present embodiment as shown in Fig. 7, the contact surface area of the wound conductor 20 and the insulating medium 4 is hardly changed by the conventional transformer structure shown in Fig. 4, and therefore, by adopting the present embodiment, It is possible to ensure the cooling of the winding conductor 20 to the same extent as in the related art. Therefore, in the present embodiment, since the temperature distribution inside the transformer is the same as in the related art, the deterioration of the insulator is the same as in the past. As described above, according to the first embodiment, since the electric field concentration of the wedge-shaped voids 22 formed between the winding conductors 20 is alleviated, the dielectric breakdown using the wedge-shaped voids 22 as a starting point can be suppressed. In addition, in the structure of the present embodiment, since the cooling performance similar to the conventional structure can be ensured, deterioration of the insulator due to heat can be suppressed, and a machine having high insulation reliability can be provided. [Embodiment 2] Fig. 11 is a view schematically showing a radial cross section of the high-voltage winding 7 in the second embodiment, and showing a cross section perpendicular to the winding axial direction. In the same figure, an inner diameter side insulating cylinder 12 having a predetermined axial length and an inner diameter side vertical insulating spacer having the same length as the inner diameter side insulating cylinder 12 and disposed in the circumferential direction thereof are provided. 14. On the outer circumference of the inner diameter side insulating cylinder 12, the high voltage winding 7 covered by the insulator and the electrostatic shield 40 for improving the withstand voltage characteristic are concentrically wound around the core leg (not shown). The circular coil 17 is formed around a predetermined number of turns. On the outer diameter side of the disk coil 17, the outer diameter side vertical insulator spacer 15 is disposed at a position corresponding to the inner diameter side vertical insulator spacer 14, and the outer diameter side insulating cylinder 13 is disposed on the outer diameter side thereof. . Here, at the position where the inner diameter side vertical insulator spacer 14 and the outer diameter side vertical insulator spacer 15 are held on the circumference of the disk coil 17, the horizontal insulator spacer 16 is interposed therebetween. The circular plate coil 17 is laminated in the axial direction to form a circular plate winding. Fig. 12 is a view showing a part of an axial cross section of the coil shown in Fig. 11, and particularly showing an enlarged view of the periphery of the high-voltage winding line end 8. In the same figure, the high-voltage winding line end 8 and the winding conductor 20 are provided, and an insulating coating 21 as a coating of the winding conductor 20 is provided around the winding conductor 20. When the abnormal voltage intrudes from the high-voltage winding line end 8, the potential distribution in the winding vibrates, and the inclination of the transient potential at the high-voltage winding line end 8 becomes large. As a result, a high electric field is generated in this portion. In order to suppress this, the electrostatic shield 40 is inserted between the winding conductors 20. Fig. 13 is a perspective view showing a configuration of a high dielectric material member 25 comprising a high dielectric material coated or impregnated around the electrostatic shield in the second embodiment. A material containing a high dielectric material member 25 is formed by coating or impregnating a material having a relatively high permittivity with respect to the solid insulating material used for the insulating coating 21 of the wound conductor 20 at the periphery of the electrostatic shield 40. A film sheet containing the high dielectric material 26 may be wound around the periphery of the electrostatic shield 40. The high dielectric material 26 is, for example, a so-called high dielectric material particle of zinc oxide, cerium oxide, barium titanate, titanium oxide, cerium carbide or aluminum oxide, or a mixture of such a mixture with a base material. As the base material, application or impregnation of the electrostatic shield 40 is considered, and for example, an epoxy resin or the like can be used. By the high dielectric material 26 produced by this method, the characteristics of the high dielectric material 26 can be adjusted by adjusting the mixing ratio of the high dielectric material particles to the epoxy resin. In order to prevent the high dielectric material 26 from being peeled off from the electrostatic shield 40 and foreign matter is mixed into the transformer, the insulating coating 21 may be applied to the periphery of the electrostatic shield 40 and the high dielectric material 26. [0030] By adopting this configuration, the electric field concentration in the wedge-shaped void 22 formed between the wound conductors 20 shown in FIG. 12 can be alleviated. Moreover, in the structure of the present embodiment, since the cooling performance similar to the conventional structure can be secured, deterioration of the insulator due to heat can be suppressed. Further, by applying the high dielectric material 26 to the electrostatic shield 40, the electrostatic capacitance between the turns can be increased, so that the effect of smoothing the potential distribution when the abnormal voltage is invaded can be increased as compared with the conventional structure. From the above description, by using this embodiment, it is possible to provide a machine having high insulation reliability. Further, the present invention is not limited to the above embodiments, and various modifications can be included. The above-described embodiments are illustrative of the present invention and are not necessarily limited to those having all of the configurations described. Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is also possible to add, remove, and replace other components for a part of the configuration of each embodiment.
[0032][0032]
1‧‧‧鐵芯1‧‧‧ iron core
2‧‧‧繞線2‧‧‧ Winding
3‧‧‧桶槽3‧‧‧ barrel
4‧‧‧絕緣媒體4‧‧‧Insulated media
5‧‧‧鐵芯腳5‧‧‧ iron core feet
6‧‧‧低壓繞線6‧‧‧Low-voltage winding
7‧‧‧高壓繞線7‧‧‧High-voltage winding
8‧‧‧高壓繞線線路端8‧‧‧High-voltage winding line end
9‧‧‧中性點端子9‧‧‧Neutral terminal
10‧‧‧高壓繞線連接線10‧‧‧High-voltage winding cable
11‧‧‧低壓繞線線路端11‧‧‧Low-voltage winding line end
12‧‧‧內徑側絕緣筒12‧‧‧Inner diameter side insulation cylinder
13‧‧‧外徑側絕緣筒13‧‧‧Outer diameter side insulation cylinder
14‧‧‧內徑側垂直絕緣物間隔片14‧‧‧Inner diameter side vertical insulation spacer
15‧‧‧外徑側垂直絕緣物間隔片15‧‧‧Outer diameter vertical insulation spacer
16‧‧‧水平絕緣物間隔片16‧‧‧Horizontal insulation spacer
17‧‧‧圓板線圈17‧‧‧round coil
20‧‧‧繞線導體20‧‧‧winding conductor
21‧‧‧絕緣覆蓋21‧‧‧Insulation coverage
22‧‧‧楔狀空隙22‧‧‧Wedge gap
23‧‧‧匝間楔形23‧‧‧Day wedge
24‧‧‧線圈間楔形24‧‧‧Waves between coils
25‧‧‧含有高介電材料構件25‧‧‧Members containing high dielectric materials
26‧‧‧高介電材料26‧‧‧High dielectric materials
27‧‧‧絕緣構件27‧‧‧Insulating components
30‧‧‧等電位線30‧‧‧ equipotential lines
31‧‧‧高電場部31‧‧‧High Electric Field Department
40‧‧‧靜電屏蔽40‧‧‧Electrostatic shielding
[0013] 第1圖是顯示油浸式變壓器之構成的概略圖。 第2圖是模式性地表示在第1圖的油浸式變壓器中之繞線的結線的圖面。 第3圖是模式性地顯示在第2圖所圖示之高壓繞線的斷面的圖面。 第4圖是顯示第3圖中之A-A’斷面之一部分的圖面。 第5圖是將第4圖中，形成於鄰接的繞線導體之間的楔狀空隙予以放大後的立體圖。 第6圖是將第5圖之匝間楔形予以放大後的圖面。 第7圖是在實施例1所採用之高壓繞線的軸向斷面圖。 第8圖是顯示實施例1所採用之含有高介電材料構件之構成的立體圖。 第9圖是於第7圖中，將形成於鄰接之繞線導體之間的楔狀空隙予以放大後的立體圖。 第10圖是將在第9圖中之匝間楔形予以放大後的圖面。 第11圖是模式性地顯示實施例2中之高壓繞線的徑向斷面的圖面。 第12圖是第11圖所示之線圈之軸向斷面的一部分的圖面。 第13圖是顯示在實施例2中之將高介電材料塗佈或含浸在靜電屏蔽周邊所構成之含有高介電材料構件25的構成的立體圖。[0013] FIG. 1 is a schematic view showing a configuration of an oil immersed transformer. Fig. 2 is a view schematically showing a winding line of a winding in the oil immersed transformer of Fig. 1. Fig. 3 is a view schematically showing a cross section of the high-voltage winding shown in Fig. 2; Fig. 4 is a view showing a part of the A-A' section in Fig. 3. Fig. 5 is a perspective view showing the wedge-shaped void formed between the adjacent winding conductors in Fig. 4 in an enlarged manner. Fig. 6 is an enlarged view of the wedge between the turns of Fig. 5. Fig. 7 is an axial sectional view of the high-voltage winding used in the first embodiment. Fig. 8 is a perspective view showing the configuration of a member containing a high dielectric material used in the first embodiment. Fig. 9 is a perspective view showing a wedge-shaped void formed between adjacent winding conductors in Fig. 7 in an enlarged manner. Fig. 10 is a view showing the enlarged wedge shape in Fig. 9 . Fig. 11 is a view schematically showing a radial section of the high-voltage winding in the second embodiment. Fig. 12 is a view showing a part of an axial section of the coil shown in Fig. 11. Fig. 13 is a perspective view showing the configuration of the high dielectric material member 25 which is formed by coating or impregnating a high dielectric material in the periphery of the electrostatic shield in the second embodiment.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-055251 | 2017-03-22 | ||
| JP2017055251A JP6789862B2 (en) | 2017-03-22 | 2017-03-22 | Rest inducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201835948A true TW201835948A (en) | 2018-10-01 |
| TWI652705B TWI652705B (en) | 2019-03-01 |
Family
ID=63585220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW107106507A TWI652705B (en) | 2017-03-22 | 2018-02-27 | Static sensor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6789862B2 (en) |
| TW (1) | TWI652705B (en) |
| WO (1) | WO2018173604A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861612A (en) * | 1981-10-08 | 1983-04-12 | Toshiba Corp | Winding for electric induction apparatus |
| JPS62245610A (en) * | 1986-04-18 | 1987-10-26 | Toshiba Corp | Foil wound transformer |
| JPH03138916A (en) * | 1989-10-24 | 1991-06-13 | Toshiba Corp | Static induction device |
| JP3593484B2 (en) * | 2000-01-13 | 2004-11-24 | 株式会社日立製作所 | Disk winding of stationary induction machine |
-
2017
- 2017-03-22 JP JP2017055251A patent/JP6789862B2/en active Active
-
2018
- 2018-02-21 WO PCT/JP2018/006150 patent/WO2018173604A1/en active Application Filing
- 2018-02-27 TW TW107106507A patent/TWI652705B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TWI652705B (en) | 2019-03-01 |
| WO2018173604A1 (en) | 2018-09-27 |
| JP2018160484A (en) | 2018-10-11 |
| JP6789862B2 (en) | 2020-11-25 |
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