WO2018036083A1 - 一种新型结构特高压直流变压器套管 - Google Patents

一种新型结构特高压直流变压器套管 Download PDF

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Publication number
WO2018036083A1
WO2018036083A1 PCT/CN2017/070403 CN2017070403W WO2018036083A1 WO 2018036083 A1 WO2018036083 A1 WO 2018036083A1 CN 2017070403 W CN2017070403 W CN 2017070403W WO 2018036083 A1 WO2018036083 A1 WO 2018036083A1
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Prior art keywords
bushing
electrode
insulating
direct current
voltage
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PCT/CN2017/070403
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English (en)
French (fr)
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虞育号
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江苏智达高压电气有限公司
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Publication of WO2018036083A1 publication Critical patent/WO2018036083A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes
    • 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

Definitions

  • the utility model relates to an ultra-high voltage bushing, in particular to a novel structure UHV DC transformer bushing.
  • the utility model aims to provide a new type of structure UHV DC transformer bushing, which has short production cycle, light weight, low manufacturing cost, high bending strength, safe and reliable operation and Significantly improve the electrical performance and other advantages.
  • the upper insulation part is divided into two sections.
  • the upper insulation upper section and the upper insulation lower section are connected by the upper end transition plate.
  • the upper insulation upper section and the upper insulation lower section are made of FRP, and the outer surface is provided with a silicone rubber umbrella sleeve, and the inner surface is evenly distributed.
  • Wrap the enamel resistance wire this layer of enamel wire can make the resistance distribution of the outer insulation surface more uniform. When there is space charge at the high pressure, it can be released by the enamel resistor wire, which greatly improves the partial discharge performance of the product.
  • Each component directly adopts a plastic structure, which increases the overall strength of the product, shortens the production cycle, and lightens the weight (only one quarter of the weight of the oil-paper capacitor), reduces manufacturing costs, high bending strength and safe and reliable operation. .
  • the lower insulation part is composed of a lower insulation upper section, a lower end transition board, a lower insulation lower section and a lower end board, and the four adopts a glued structure, and even if the inside of the casing fails, the high-strength FRP glued structure can ensure that it does not occur here. Leak, do not burn, do not explode, to ensure the safe operation of the transformer.
  • the high voltage electrode acts as a jacket-loaded current-carrying conductor and is at a high potential.
  • the intermediate electrode is connected to the upper end transition plate and the lower end transition plate, and the three are equipotential, and the voltage at the intermediate electrode is about half of the high voltage by design calculation.
  • the ground electrode is connected to the grounding barrel and is at ground potential. Ensure the overall electrical performance of the bushing.
  • Figure 1 is a schematic view showing the structure of the present invention
  • a novel structure UHV DC transformer bushing comprises an electrode part, an upper insulating part, a grounding cylinder part, a lower insulating part, a sealing structure part and a shielding part.
  • the sleeve ensures the overall sealing of the sleeve through the spring structure 7, the high-voltage electrode 1 and the seals of the various components, and is filled with a certain pressure SF6 insulating gas.
  • the electrode portion includes a high voltage electrode 1, an intermediate electrode 2, and a ground electrode 3.
  • the high voltage electrode 1 serves as a bushing carrier current carrying conductor, and is short-circuited with the upper end plate 11 and the lower end plate 12, and is at a high potential.
  • the intermediate electrode 2 is connected to the upper end transition plate 4 and the lower end transition plate 5, and the three are equipotential, and the voltage is about half of the high voltage by design calculation.
  • the ground electrode 3 and the grounding cylinder 6 are connected to be at ground potential.
  • the upper insulating portion is composed of an upper insulating upper portion 81, an upper insulating lower portion 82, and an upper end transition plate 3.
  • the upper insulating upper portion 81 and the upper insulating lower portion 82 are respectively provided with a plastic structure, and the outer surface is provided with a silicone rubber umbrella cover 83.
  • the inner surface is evenly wrapped around the enamel-resistance wire, which can evenly distribute the surface resistance distribution and release the harmful space charge in time.
  • the grounding cylinder 6 is partially equipped with a final screen measuring structure and a mounting flange structure, and a current transformer can be installed here.
  • the lower insulating portion is composed of a lower insulating upper section 91, a lower end transition plate 5 and a lower insulating lower section 92, and the upper insulating and lower insulating materials are made of glass fiber reinforced plastic. The parts are connected by fasteners.
  • the shielding portion is provided with a shielding ring at the head and the tail of the sleeve.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)

Abstract

一种新型特高压直流变压器套管结构，主要用于±500kV及以上电压等级，与传统直流套管相比最大区别在于：将传统电容式套管均压电容屏简化为高压电极（1）、中间电极（2）和接地电极（3）三部分；传统套管整体式外绝缘改成分体式，并且在绝缘内表面均匀布置有电阻丝，使套管外绝缘电压均匀分布。及时释放直流套管产生的有害空间电荷。和传统直流套管相比，该套管具有生产周期短、重量轻、制造成本低、抗弯强度高、运行安全可靠和显著提高电气性能等优点。

Description

一种新型结构特高压直流变压器套管 技术领域
本实用新型涉及一种特高压套管，具体的说是一种新型结构特高压直流变压器套管。
背景技术
随着国民经济的发展，居民和工业用电量的激增，输送电线路电压等级向超高压和特高压方向发展，国内开始建设特高压1100kV交流输送电线路和±800kV直流输送线路，并规划建设±1100kV直流输送线路，因此和输送电线路相配套的特高压套管有广阔的市场前景。
现在国内基本采用进口直流套管，生产周期长，价格高，直流套管由于外部电压分布不均匀，套管制造厂普遍增加外绝缘干弧距离来解决，这样不仅增加了产品的成本，也增加了产品的制造难度。
发明内容
为了满足现在市场使用需求，本实用新型的目的是提供一种新型结构特高压直流变压器套管，该新型结构套管生产周期短、重量轻、制造成本低、抗弯强度高、运行安全可靠和显著提高电气性能等优点。
本实用新型的目的是通过以下技术方案来实现的：
上绝缘部分分为两节，上绝缘上节和上绝缘下节、中间通过上端过渡板连接，上绝缘上节和上绝缘下节材质为玻璃钢，外表面附有硅橡胶伞套，内表面均匀缠绕漆包电阻丝，这层漆包电阻丝可以使外绝缘表面电阻分布更加均匀，当高压处有空间电荷出现时，可以通过漆包电阻丝释放，大大提高产品的局放性能。各零部件直接采用胶装结构，增加了产品的整体强度，生产周期变短，重量变轻(仅为油纸电容式重量的四分之一)，制造成本降低、抗弯强度高和运行安全可靠。
下绝缘部分由下绝缘上节、下端过渡板、下绝缘下节和下端板组成，四者采用胶装结构，即使套管内部发生故障，高强度的玻璃钢胶装结构也能保证此处不发生泄漏，不燃烧、不爆炸，保证变压器的运行安全。
高压电极作为套管载压载流导体，处于高电位。中间电极和上端过渡板、下端过渡板连接，三者等电位，通过设计计算，使中间电极处电压约为高电压一半。接地电极和接地筒连接，处于地电位。保证套管的整体电气性能。
附图说明
图1为本实用新型实施的结构示意图；
具体实施方式
下面结合附图对本实用新型作进一步说明。
一种新型结构特高压直流变压器套管，包括电极部分、上绝缘部分、接地筒部分、下绝缘部分、密封结构部分、屏蔽部分组成。套管通过弹簧结构7、高压电极1和各零部件的密封件保证套管整体密封，内充一定压力SF6绝缘气体。其中电极部分包括高压电极1、中间电极2和接地电极3。高压电极1作为套管载压载流导体，和上端板11、下端板12短接，处于高电位。中间电极2和上端过渡板4、下端过渡板5连接，三者等电位，通过设计计算，此处电压约为高电压一半。接地电极3和接地筒6连接，处于地电位。上绝缘部分由上绝缘上节81、上绝缘下节82、上端过渡板3组成，上绝缘上节81和上绝缘下节82两端采用胶装结构，外表面附有硅橡胶伞套83，内表面均匀缠绕漆包电阻丝，可以均匀外绝缘表面电阻分布，及时释放有害空间电荷。接地筒6部分装有末屏测量结构和安装法兰结构，同时此处可以安装电流互感器。下绝缘部分由下绝缘上节91、下端过渡板5和下绝缘下节92组成，上绝缘和下绝缘材质为玻璃钢材质。各部件之间通过紧固件连接。屏蔽部分在套管头部和尾部都设有屏蔽环。

Claims (3)

  1. 一种新型结构特高压直流变压器套管，其特征在于：该套管包括电极部分、上绝缘部分、接地筒部分、下绝缘部分、密封结构部分和屏蔽部分。其中电极部分包括高压电极(1)、中间电极(2)和接地电极(3)组成。上绝缘部分由上绝缘上节(81)、上绝缘下节(82)、上端过渡板(3)组成，上绝缘上节(81)和上绝缘下节(82)表面附有硅橡胶伞套(83)，上绝缘材质为玻璃钢材质，内表面均匀缠绕漆包电阻丝。接地筒(6)部分装有末屏测量结构和安装法兰结构，同时此处可以安装电流互感器。下绝缘部分由下绝缘上节(91)、下端过渡板(5)和下绝缘下节(92)组成，下绝缘材料为玻璃钢。密封结构包括弹簧结构(7)、上端板(11)、下端板(12)及各零部件间密封件。屏蔽部分在套管头部和尾部都设有屏蔽环。
    高压电极(1)作为套管载压载流导体，和上端板(11)、下端板(12)短接，处于高电位。中间电极(2)和上端过渡板(4)、下端过渡板(5)连接，三者等电位，通过设计计算，此处电压约为高电位一半。接地电极(3)和接地筒(6)连接，处于地电位。
  2. 根据权利要求1所述的一种新型结构特高压直流变压器套管，套管整体通过高压电极(1)、弹簧结构(7)和各零部件的密封件进行整体密封，套管内充SF6气体。
  3. 根据权利要求1所述的一种新型结构特高压直流变压器套管，绝缘内表面均匀布置有电阻丝，使套管外绝缘电压均匀分布。
PCT/CN2017/070403 2016-08-22 2017-01-06 一种新型结构特高压直流变压器套管 WO2018036083A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108646082A (zh) * 2018-08-16 2018-10-12 江苏靖江互感器股份有限公司 一种环网柜用电容型电缆式电压传感器

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EP0935259A2 (en) * 1998-02-04 1999-08-11 Hitachi, Ltd. Bushing
CN2509688Y (zh) * 2001-12-08 2002-09-04 弥璞 纯干式复合外套高压套管
CN101017717A (zh) * 2007-02-09 2007-08-15 山东彼岸电力科技有限公司 特高压复合支柱绝缘子
CN101582315A (zh) * 2009-06-23 2009-11-18 河南平高电气股份有限公司 一种特高压硅橡胶套管
CN102231309A (zh) * 2011-04-02 2011-11-02 南京智达电气有限公司 一种特高压交直流套管
CN103413636A (zh) * 2013-08-19 2013-11-27 中国能建集团装备有限公司北京技术中心 一种配置有内屏蔽电极的特高压直流支柱复合绝缘子
CN204559041U (zh) * 2015-05-14 2015-08-12 国家电网公司 高压复合绝缘穿墙套管
CN106099794A (zh) * 2016-08-22 2016-11-09 江苏智达高压电气有限公司 一种特高压直流穿墙套管
CN106205980A (zh) * 2016-08-22 2016-12-07 江苏智达高压电气有限公司 一种特高压交流变压器套管

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0935259A2 (en) * 1998-02-04 1999-08-11 Hitachi, Ltd. Bushing
CN2509688Y (zh) * 2001-12-08 2002-09-04 弥璞 纯干式复合外套高压套管
CN101017717A (zh) * 2007-02-09 2007-08-15 山东彼岸电力科技有限公司 特高压复合支柱绝缘子
CN101582315A (zh) * 2009-06-23 2009-11-18 河南平高电气股份有限公司 一种特高压硅橡胶套管
CN102231309A (zh) * 2011-04-02 2011-11-02 南京智达电气有限公司 一种特高压交直流套管
CN103413636A (zh) * 2013-08-19 2013-11-27 中国能建集团装备有限公司北京技术中心 一种配置有内屏蔽电极的特高压直流支柱复合绝缘子
CN204559041U (zh) * 2015-05-14 2015-08-12 国家电网公司 高压复合绝缘穿墙套管
CN106099794A (zh) * 2016-08-22 2016-11-09 江苏智达高压电气有限公司 一种特高压直流穿墙套管
CN106205980A (zh) * 2016-08-22 2016-12-07 江苏智达高压电气有限公司 一种特高压交流变压器套管

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108646082A (zh) * 2018-08-16 2018-10-12 江苏靖江互感器股份有限公司 一种环网柜用电容型电缆式电压传感器
CN108646082B (zh) * 2018-08-16 2023-12-08 江苏靖江互感器股份有限公司 一种环网柜用电容型电缆式电压传感器

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