WO2000036616A1 - A dry-type air-core reactor with magnetic shield - Google Patents

A dry-type air-core reactor with magnetic shield Download PDF

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Publication number
WO2000036616A1
WO2000036616A1 PCT/CN1999/000208 CN9900208W WO0036616A1 WO 2000036616 A1 WO2000036616 A1 WO 2000036616A1 CN 9900208 W CN9900208 W CN 9900208W WO 0036616 A1 WO0036616 A1 WO 0036616A1
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WIPO (PCT)
Prior art keywords
layer
type air
reactor
dry
core reactor
Prior art date
Application number
PCT/CN1999/000208
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French (fr)
Chinese (zh)
Inventor
Shanxi Huang
Liang Shu
Minlin Zhang
Original Assignee
Xi'an Yangzi Electrical Co., Ltd.
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Publication date
Application filed by Xi'an Yangzi Electrical Co., Ltd. filed Critical Xi'an Yangzi Electrical Co., Ltd.
Priority to AU17669/00A priority Critical patent/AU1766900A/en
Publication of WO2000036616A1 publication Critical patent/WO2000036616A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core
    • 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
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • 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
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/08—Fixed transformers not covered by group H01F19/00 characterised by the structure without magnetic core

Definitions

  • the present invention relates to a reactor of a power system, and in particular to a magnetic shield dry-type air-core reactor for preventing magnetic leakage. Background technique
  • reactors There are two types of reactors: “dry” and “oil-immersed”.
  • “Dry type” reactor means that the insulating medium of the reactor does not contain insulating oil
  • “oil diffuse” means that the insulating oil is used as its insulating medium. Oil is flammable and leaky, and it is easy to age and deteriorate during operation. Therefore, the use of non-oiled reactors is the development trend of reactors. If it is classified according to the magnetic permeability medium of the reactor, the structure type of the reactor can be divided into “iron core type” and “air core type”.
  • the "iron core type” reactor has the advantages of small size and small magnetic leakage, but It is expensive and heavy, especially its characteristics have poor linearity.
  • FIG. 3 shows a top view of a conventional dry-type air-core reactor, which is formed by winding reactor windings between upper and lower star frames 7 to form a reactor body 1.
  • the upper and lower parts of the reactor body 1 are connected from top to bottom.
  • the dry-type air-core reactor of this type has a lead-out terminal 5 leading out of the lower star frame 7 because the reactor body directly contacts the outside world.
  • a large amount of magnetic leakage generated during the work process spreads around, thus causing interference to nearby devices such as computers, test instruments, and meters, which affects its normal work.
  • the surrounding metal materials, ferromagnetic materials such as steel bars, etc. will generate heat and cause danger. Disclosure of invention
  • An object of the present invention is to provide a magnetic shield dry-type air-core reactor to prevent the leakage of magnetic leakage from the reactor to the surroundings.
  • the magnetic shielding dry-type air-core reactor of the present invention has an upper and lower star frame, and is wound on the star A reactor body composed of reactor windings between the shaped frames, and outlet terminals connected to the body provided above and below the body.
  • a magnetic conductor layer covering the reactor body is provided on the periphery of the reactor body.
  • An insulation layer surrounding the magnetization layer is provided inside the magnetization layer between the magnetization layer and the reactor body; and an insulation layer surrounding the magnetization layer is also provided outside the magnet layer.
  • An air passage is provided between the reactor body and an insulating layer located inside the magnetoconductive layer.
  • the air passage is formed by providing a plurality of insulating supports at a certain distance along the outer periphery of the reactor body between the reactor body and an insulation layer located inside the magnetically permeable layer.
  • the reactor is electrically connected to a point on the magnetically conductive layer.
  • the insulating layer is epoxy glass fiber.
  • the magnetically permeable layer is a silicon steel sheet or a hafnium titanate.
  • a sprayed protective layer is provided on the insulation layer outside the upper layer magnet.
  • the protective layer is a silicone resin paint.
  • FIG. 1 is a plan view of a magnetically shielded thousand-type air-core reactor of the present invention.
  • Fig. 2 is a sectional view of a part of a magnetically shielded thousand-type air-core reactor of the present invention. The best way to implement the invention
  • a reactor winding is wound between the upper and lower star frames 7 to form a reactor body 1.
  • the reactor main body 1 is connected at the upper and lower parts with outlet terminals 5 leading from the upper and lower star frames 7.
  • the reactor body 1 is provided on the periphery of the reactor body 1 so as to cover the reactor body
  • the material of the magnetically permeable layer 3 may be, for example, a silicon steel sheet or iron oxide. Due to the existence of the magnetically permeable layer, the electromagnetic field generated by the reactor body can be prevented from being radiated to the outside of the magnetically permeable layer 3 due to the electromagnetic shielding effect.
  • an insulation layer surrounding the magnetically permeable layer 3 is provided inside the magnetically permeable layer 3 (near the reactor body 1).
  • 4a for example, the thickness is 2 to 3 mm
  • an outer insulating layer 4b for example, the thickness is 3 to 5 mm
  • the insulating layers 4a and 4b are band-shaped insulating materials, for example, epoxy glass fiber tape.
  • a plurality of strip-shaped or rod-shaped insulation supports 8 are provided between the outer periphery of the reactor body 1 and the insulation layer 4a inside the magnetically permeable layer 3 (for example, 20 to 100 mm).
  • a plurality of insulating supports are spaced apart from each other, thereby forming the air duct 2.
  • a copper or aluminum wire with a length of about 100 to 300 mm is welded at one point of the magnetically permeable conductor, and it is drawn out and connected to the reactor winding, sprayed after curing.
  • a weather-resistant protective layer such as silicone paint.
  • a support insulator 6 for supporting the reactor is provided at the lower end of the star frame 7.
  • the magnetic shielding dry-type air-core reactor of the present invention provides magnetic shielding performance on the periphery of the electric antibody so that the reactor has magnetic shielding performance, and avoids damage to surrounding devices due to magnetic leakage.
  • the structure is simple and the shielding effect is good.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

Present invention provides a dry-type air-core reactor with a magnetic shield. A magnetic layer is provided on the periphery of the reactor body to cover the reactor body. Insulation layers are provided on both inside and outside surface of the magnetic layer. A plurality of insulation supporter are provided in certain interval between the insulation layer in the inner side of mangnetic layer and reactor body to form air vent. The air-core reactor according to the invention can be prevented from magnetic leakage.

Description

磁屏蔽干式空芯电抗器 技术领域  TECHNICAL FIELD
本发明涉及电力系统的电抗器， 特别涉及防止磁泄漏的磁屏蔽 干式空芯电抗器。 背景技术  The present invention relates to a reactor of a power system, and in particular to a magnetic shield dry-type air-core reactor for preventing magnetic leakage. Background technique
电抗器有 "干式" 和 "油浸" 两大类型。 "干式" 电抗器指电 抗器的绝缘介质中不含有绝缘油， "油漫" 是指用绝缘油作为其绝 缘介质。 由于油具有易燃、 易漏性， 运行中容易老化、 劣化， 因此 使用无油化电抗器是电抗器的发展趋势。 如果按电抗器的导磁媒廣 来分类， 则电抗器结构型式可分为 "铁芯式" 和 "空芯式" ， "铁 芯式" 电抗器具有体积小， 漏磁小等优点， 但价格贵， 重量重， 尤 其是其特性线性度较差， "空芯式" 电抗器具有线性度好， 价格便 宜， 重量轻等优点， 但漏磁大， 对周围环境产生辐射污染。 图 3 表 示现有的干式空芯电抗器的俯视图， 它是将电抗器绕组绕制在上下 星形架 7间， 构成电抗器本体 1 ， 电抗器本体 1 的上、 下方接有从 上、 下星形架 7引出的出线端子 5， 这种结构的干式空芯电抗器由 于电抗本体直接与外界接触。 它在工作过程中所产生的大量漏磁向 四周扩牧， 从而对附近的装置如计算机、 测试仪器、 仪表等产生干 扰， 影响其正常工作。 另外会使周围的金属材料、 铁磁材料如钢筋 等发热， 产生危险。 发明的公开  There are two types of reactors: "dry" and "oil-immersed". "Dry type" reactor means that the insulating medium of the reactor does not contain insulating oil, and "oil diffuse" means that the insulating oil is used as its insulating medium. Oil is flammable and leaky, and it is easy to age and deteriorate during operation. Therefore, the use of non-oiled reactors is the development trend of reactors. If it is classified according to the magnetic permeability medium of the reactor, the structure type of the reactor can be divided into "iron core type" and "air core type". The "iron core type" reactor has the advantages of small size and small magnetic leakage, but It is expensive and heavy, especially its characteristics have poor linearity. "Air-core" reactors have the advantages of good linearity, cheap price, and light weight, but they have large magnetic leakage and cause radiation pollution to the surrounding environment. FIG. 3 shows a top view of a conventional dry-type air-core reactor, which is formed by winding reactor windings between upper and lower star frames 7 to form a reactor body 1. The upper and lower parts of the reactor body 1 are connected from top to bottom. The dry-type air-core reactor of this type has a lead-out terminal 5 leading out of the lower star frame 7 because the reactor body directly contacts the outside world. A large amount of magnetic leakage generated during the work process spreads around, thus causing interference to nearby devices such as computers, test instruments, and meters, which affects its normal work. In addition, the surrounding metal materials, ferromagnetic materials such as steel bars, etc. will generate heat and cause danger. Disclosure of invention
本发明的目的是提供一种磁屏蔽干式空芯电抗器， 防止电抗器 的漏磁向周围的扩散。  An object of the present invention is to provide a magnetic shield dry-type air-core reactor to prevent the leakage of magnetic leakage from the reactor to the surroundings.
本发明的磁屏蔽干式空芯电抗器， 具有上下星形架、 绕制在星 形架之间的由电抗器绕组构成的电抗器本体， 及设在本体上下方与 本体相连的出线端子。 The magnetic shielding dry-type air-core reactor of the present invention has an upper and lower star frame, and is wound on the star A reactor body composed of reactor windings between the shaped frames, and outlet terminals connected to the body provided above and below the body.
其中， 在该电抗器本体的外围设有覆盖该电抗器本体的导磁体 层。  Among them, a magnetic conductor layer covering the reactor body is provided on the periphery of the reactor body.
在所述导磁体层和电抗器本体之间的导磁体层内侧， 设有包裹 导磁体层的绝缘层； 在磁体层的外侧， 也设有包裹导磁体层的绝缘 层。  An insulation layer surrounding the magnetization layer is provided inside the magnetization layer between the magnetization layer and the reactor body; and an insulation layer surrounding the magnetization layer is also provided outside the magnet layer.
在上述电抗器本体和位于上述导磁体层内侧的绝缘层之间设有 气道。  An air passage is provided between the reactor body and an insulating layer located inside the magnetoconductive layer.
上述气道是通过在上述电抗器本体和位于导磁体层内侧的绝缘 层之间， 沿电抗器本体的外周相距一定间隔设置多个绝缘支撑物而 形成。  The air passage is formed by providing a plurality of insulating supports at a certain distance along the outer periphery of the reactor body between the reactor body and an insulation layer located inside the magnetically permeable layer.
电抗器与导磁体层上的一点电气连接。  The reactor is electrically connected to a point on the magnetically conductive layer.
所述绝缘层是环氧玻璃纤维。  The insulating layer is epoxy glass fiber.
所述导磁体层是硅钢片或铗钛氧体。  The magnetically permeable layer is a silicon steel sheet or a hafnium titanate.
在上迷层磁体外側的绝缘层上有喷涂的保护层。  A sprayed protective layer is provided on the insulation layer outside the upper layer magnet.
上述保护层是硅树脂漆。 附图的简要说明  The protective layer is a silicone resin paint. Brief description of the drawings
图 1是本发明的磁屏蔽千式空芯电抗器的俯视图。  FIG. 1 is a plan view of a magnetically shielded thousand-type air-core reactor of the present invention.
图 2是本发明的磁屏蔽千式空芯电抗器的一部分的剖面图。 实现本发明的最佳方式  Fig. 2 is a sectional view of a part of a magnetically shielded thousand-type air-core reactor of the present invention. The best way to implement the invention
以下通过实施例并结合附图对本发明作进一步说明。  The present invention will be further described below through embodiments and the accompanying drawings.
如图 1 、 图 2所示， 在上下星形架 7间， 绕制电抗器绕组， 形 成电抗器本体 1 。 电抗器本体 1 的上、 下方接有从上、 下星形架 7 引出的出线端子 5。 在电抗器本体 1 的外围设有覆盖该电抗器本体 的导磁体层 3。 导磁体层 3的材料例如可以是硅钢片或铁汰氧体， 由于导磁体层的存在， 根据电磁屏蔽效应， 能使电抗器本体产生的 电磁场不致幅射到导磁体层 3的外面。 另外， 为了使覆盖有导磁体 层的电抗器本体在工作时不会产生向导磁体层的放电， 在导磁体层 3 的内侧 （靠近电抗器本体 1侧） 设置一包裹导磁体层 3 的绝缘层 4a (厚度例如为 2 ~ 3mm )， 在导磁体层 3的外侧也覆盖了一层绝 缘层 4b (厚度例如为 3 ~ 5mm ) 。 该绝缘层 4a 、 4b是带状绝缘 材料， 例如为环氧玻璃纤维胶带。 为了使电抗器产生的热量易于牧 发， 在电抗器本体 1的外周和导磁体层 3内側的绝缘层 4a之间 （例 如 20 ~ 100mm ) 设置多个条状或棒状的绝缘支撑物 8 , 该多个绝 缘支撑物相距一定间隔， 由此形成气道 2。为了防止在电抗器本体 1 和导磁体层 3间产生悬浮电位， 在导磁体一点焊接一 4艮长约 100 ~ 300mm的铜线或铝线， 并引出与电抗器绕组焊接相连， 待固化后喷 涂一层耐候型保护层， 如硅树脂漆。 在星形架 7的下端， 设有用于 支撑电抗器的支持绝缘子 6 。 As shown in FIGS. 1 and 2, a reactor winding is wound between the upper and lower star frames 7 to form a reactor body 1. The reactor main body 1 is connected at the upper and lower parts with outlet terminals 5 leading from the upper and lower star frames 7. The reactor body 1 is provided on the periphery of the reactor body 1 so as to cover the reactor body The permeable magnet layer 3. The material of the magnetically permeable layer 3 may be, for example, a silicon steel sheet or iron oxide. Due to the existence of the magnetically permeable layer, the electromagnetic field generated by the reactor body can be prevented from being radiated to the outside of the magnetically permeable layer 3 due to the electromagnetic shielding effect. In addition, in order to prevent the discharge of the guide magnet layer during the operation of the reactor body covered with the magnetically permeable layer, an insulation layer surrounding the magnetically permeable layer 3 is provided inside the magnetically permeable layer 3 (near the reactor body 1). 4a (for example, the thickness is 2 to 3 mm), and an outer insulating layer 4b (for example, the thickness is 3 to 5 mm) is also covered on the outside of the magnetically conductive layer 3. The insulating layers 4a and 4b are band-shaped insulating materials, for example, epoxy glass fiber tape. In order to make the heat generated by the reactor easy to radiate, a plurality of strip-shaped or rod-shaped insulation supports 8 are provided between the outer periphery of the reactor body 1 and the insulation layer 4a inside the magnetically permeable layer 3 (for example, 20 to 100 mm). A plurality of insulating supports are spaced apart from each other, thereby forming the air duct 2. In order to prevent a floating potential between the reactor body 1 and the magnetically conductive layer 3, a copper or aluminum wire with a length of about 100 to 300 mm is welded at one point of the magnetically permeable conductor, and it is drawn out and connected to the reactor winding, sprayed after curing. A weather-resistant protective layer, such as silicone paint. A support insulator 6 for supporting the reactor is provided at the lower end of the star frame 7.
以上通过实施例对本发明进行了说明， 但本发明范围不限定于 此， 凡在不违背本发明的精神和内容的基础上所作的改进或棒换， 应被视为属于本发明的保护范围。 工业应用性  The present invention has been described above through the embodiments, but the scope of the present invention is not limited thereto. Any improvement or change made without departing from the spirit and content of the present invention shall be regarded as belonging to the protection scope of the present invention. Industrial applicability
本发明的磁屏蔽干式空芯电抗器通过在电抗体的外周设置导磁 体， 使电抗器具有磁屏蔽性能， 避免了由于漏磁所引起的对周围装 置产生的危害。 且结构简单， 屏蔽效果好。  The magnetic shielding dry-type air-core reactor of the present invention provides magnetic shielding performance on the periphery of the electric antibody so that the reactor has magnetic shielding performance, and avoids damage to surrounding devices due to magnetic leakage. The structure is simple and the shielding effect is good.

Claims

杈利要求 Profit requirements
1.一种磁屏蔽干式空芯电抗器， 它具有上下星形架、 绕制在星 形架之间的由电抗器绕組构成的电抗器本体， 及设在本体上下方与 本体相连的出线端子， 1. A magnetically shielded dry-type air-core reactor, comprising an upper and lower star-shaped frame, a reactor body composed of reactor windings wound between the star-shaped frames, and a body connected to the body provided above and below the body Outgoing terminal,
其特征在于， 在该电抗器本体的外围设有覆盖该电抗器本体的导磁 体层。 It is characterized in that a magnetic conductive layer covering the reactor body is provided on the periphery of the reactor body.
2.根据权利要求 1所迷的磁屏蔽千式空芯电抗器，  2. The magnetically shielded thousand-type air-core reactor according to claim 1,
其特征在于， 在所迷导磁体层和电抗器本体之间的导磁体层内 側， 设有包裹导磁体层的绝缘层； 在磁体层的外侧， 也设有包裹导 磁体层的绝缘层。  It is characterized in that an insulation layer surrounding the magnetization layer is provided on the inner side of the magnetization layer between the magnetization layer and the reactor body; and an insulation layer surrounding the magnetization layer is also provided on the outside of the magnet layer.
3.根据权利要求 2所述的磁屏蔽干式空芯电抗器，  3. The magnetic shielding dry-type air-core reactor according to claim 2,
其特征在于， 在上述电抗器本体和位于上述导磁体层内侧的绝缘层 之间设有气道。 It is characterized in that an air passage is provided between the reactor body and an insulation layer located inside the magnetically conductive layer.
4.根据杈利要求 3所述的磁屏蔽干式空芯电抗器， 側的绝缘层之间， 沿电抗器本体的外周相距一定间隔设置多个绝缘 支撑物而形成。  4. The magnetically shielded dry-type air-core reactor according to claim 3, wherein a plurality of insulation supports are arranged between the insulation layers on the side along the outer circumference of the reactor body at a certain interval.
5.根据权利要求 1 至 4 的任一项所述的磁屏蔽干式空芯电抗 器，  The magnetically shielded dry-type air-core reactor according to any one of claims 1 to 4,
其特征在于， 电抗器与导磁体层上的一点电气连接。 It is characterized in that the reactor is electrically connected to a point on the magnetically conductive layer.
6.根据权利要求 2所述的磁屏蔽干式空芯电抗器，  6. The magnetic shield dry-type air-core reactor according to claim 2,
其特征在于， 所迷绝缘层是环氧玻璃纤维。 It is characterized in that the insulating layer is epoxy glass fiber.
7. 根据杈利要求 1所述的磁屏蔽干式空芯电抗器，  7. The magnetically shielded dry-type air-core reactor according to claim 1,
其特征在于， 所述导磁体层是硅钢片或铗钛氧体。 It is characterized in that the magnetically permeable layer is a silicon steel sheet or a hafnium-titanium oxide.
8.根据权利要求 2所述的磁屏蔽干式空芯电抗器，  8. The magnetically shielded dry-type air-core reactor according to claim 2,
其特征在于， 在上述层磁体外側的绝缘层上有喷涂的保护层。 It is characterized in that a sprayed protective layer is provided on the insulating layer on the outside of the layer magnet.
9.根据权利要求 7所述的磁屏蔽干式空芯电抗器， 其特征在于， 上迷保护层是硅树脂漆。 The magnetic shielding dry-type air-core reactor according to claim 7, wherein the protective layer is a silicone resin paint.
PCT/CN1999/000208 1998-12-11 1999-12-13 A dry-type air-core reactor with magnetic shield WO2000036616A1 (en)

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AU17669/00A AU1766900A (en) 1998-12-11 1999-12-13 A dry-type air-core reactor with magnetic shield

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CN98233242U CN2359790Y (en) 1998-12-11 1998-12-11 Magnetic shielding dry-type air reactor
CN98233242.4 1998-12-11

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CN103594225A (en) * 2013-11-29 2014-02-19 华北电力大学 Air-core reactor with shielding case
CN105047381B (en) * 2015-07-09 2017-09-22 广西电网有限责任公司电力科学研究院 A kind of 35kV dry-type air-core reactors
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CN114999796B (en) * 2022-07-22 2023-03-14 广东鹏鑫电气科技有限公司 Coil structure of SCB14 type dry-type power transformer with non-circular coil

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