WO2024055460A1 - Insulating device used in gas-liquid mixed medium - Google Patents
Insulating device used in gas-liquid mixed medium Download PDFInfo
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- WO2024055460A1 WO2024055460A1 PCT/CN2022/139324 CN2022139324W WO2024055460A1 WO 2024055460 A1 WO2024055460 A1 WO 2024055460A1 CN 2022139324 W CN2022139324 W CN 2022139324W WO 2024055460 A1 WO2024055460 A1 WO 2024055460A1
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- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 239000012212 insulator Substances 0.000 claims abstract description 178
- 238000009413 insulation Methods 0.000 claims abstract description 40
- 239000002184 metal Substances 0.000 claims abstract description 27
- 238000009835 boiling Methods 0.000 claims description 10
- 230000015556 catabolic process Effects 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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
- H01B17/34—Insulators containing liquid, e.g. oil
-
- 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
Definitions
- the invention relates to the field of high-voltage insulation, and in particular to an insulation device used in a gas-liquid mixed medium.
- phase change heat medium This type of material that cools and dissipates heat from the device through a phase change heat process is usually called a phase change heat medium.
- the application of this type of medium in the field of heat dissipation of high-voltage equipment is not yet mature. At present, it has only been initially explored in power transformers, capacitors, converter valves and other equipment, and has not yet been widely used.
- High-voltage DC transmission equipment such as converter valves have important requirements for high-reliability heat dissipation systems.
- take the deionized water cooling system used for converter valve cooling as an example. According to statistics, among the 47 emergency major defects in converter valves within 3 years, 21 (45%) were in the water cooling system. After analysis, the main reasons were water leakage (9 times), water pump failure (7 times) and valve cooling controller failure (5 times). The reason is that leakage in the cooling system using water as the cooling medium often leads to insulation failure; and the water cooling system has many equipment and complex control, which will lead to an increase in the failure rate of the converter valve. Materials such as fluorocarbons have excellent insulation properties and chemical stability.
- phase change process is used for heat dissipation, it can achieve fundamental innovation in the refrigeration technology of the converter valve system.
- the specific design of the converter valve system there are unsolved technical problems in the fields of internal insulation structure design, external insulation coordination, incompatible material selection, type test methods, operation and maintenance methods, etc., and support has not yet been formed. Technology for long-term reliable operation of the system.
- the object of the present invention is to provide an insulation device used in a gas-liquid mixed medium, which can avoid the problem of the accumulation of the gas-liquid mixed medium on the surface of the insulation device, resulting in a decrease in insulation performance.
- the present invention provides the following solutions:
- An insulation device used in a gas-liquid mixed medium including: a first insulator section, a second insulator section and a third insulator section;
- the first insulator section and the second insulator section are both truncated cone-shaped; the third insulator section is cylindrical;
- the upper bottom surface of the first insulator segment is connected to the high-potential metal body, and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment;
- One bottom surface of the third insulator section is connected to the low-potential metal body, and the other bottom surface is fixed to the upper bottom surface of the second insulator section;
- the side surfaces of the first insulator section, the side surfaces of the second insulator section and the side surfaces of the third insulator section are all in the shape of sinusoidal function curves in the axial direction.
- the diameter of the upper bottom surface of the first insulator section is greater than or equal to the diameter of the high-potential metal body.
- the diameter of the lower bottom surface of the first insulator section is twice the diameter of the upper bottom surface of the first insulator section.
- the diameter of the lower bottom surface of the second insulator section is equal to the diameter of the lower bottom surface of the first insulator section; the diameter of the upper bottom surface of the second insulator section is equal to the diameter of the upper bottom surface of the first insulator section.
- the diameter of the bottom surface of the third insulator section is equal to the diameter of the upper bottom surface of the second insulator section.
- the axial curve length of the side of the first insulator section is:
- l 1 is the axial curve length of the side of the first insulator section
- h 2 is the lower bottom diameter of the first insulator section
- h 1 is the upper bottom diameter of the first insulator section.
- the axial curve function of the side of the first insulator segment is:
- x 1 is the distance between the upper bottom surface of the first insulator section and the lower bottom surface of the first insulator section
- r 0 is the maximum bubble diameter when the medium is boiling
- l 1 is the axial curve length of the side of the first insulator section; if the value range of A does not exist, the side of the first insulator section adopts a straight line.
- the direction of the axial curve function of the side of the second insulator segment is opposite to the direction of the axial curve function of the side of the first insulator segment.
- the axial curve function of the side of the third insulator section is:
- x 2 is the distance between the upper bottom surface of the second insulator segment and the low-potential metal body
- l 1 is the length of the axial curve on the side of the first insulator section
- d 3 is the projected length of the axial curve on the side of the third insulator section
- l 1 is the axial curve length of the side of the first insulator section
- ceiling() is an upward rounding function
- d 3 l T -2l 1
- l T is the shortest creepage length of the insulation device
- E is the breakdown field strength of the phase-change thermal medium in the liquid state
- l 0 is the creepage length of the insulator with a withstand voltage of
- U H is the potential of the high-potential metal body
- U L is the potential of the low-potential metal body
- p is the boiling degree of the phase-change heat medium liquid
- k is the coefficient
- kE is the field strength in the bubble after the phase-change heat medium boil
- the present invention discloses the following technical effects: by arranging two truncated cone-shaped insulator segments and one cylindrical insulator segment, and the side surfaces of the three insulator segments are all sinusoidal function curves in the axial direction.
- the upper bottom surface of the first insulator segment is connected to the high-potential metal body, and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment; one bottom surface of the third insulator segment is connected to the low-potential metal body, and the other bottom surface is connected to the second insulator segment
- the upper bottom surface is fixed, which avoids the problem that the gas-liquid mixed medium accumulates on the surface of the insulation device and causes the insulation performance to decrease, that is, the insulation performance of the insulation device in the gas-liquid mixed medium is improved.
- Figure 1 is an overall schematic diagram of an insulation device used in a gas-liquid mixed medium according to the present invention.
- the purpose of the present invention is to provide an insulation device for use in a gas-liquid mixed medium.
- the problem of aggregation of the gas-liquid mixed medium on the surface of the insulating device resulting in a decrease in insulation performance is avoided. That is, The insulation performance of the insulation device in the gas-liquid mixed medium is improved.
- the present invention designs an insulation device for the insulator in which the inside of the converter valve is immersed in the phase-change heat medium when a phase-change heat medium is used.
- air insulators are mostly shed structures, and only need to consider the insulation performance when both ends are subjected to high voltage.
- the insulation device provided by the present invention focuses on the fact that the phase-change heat medium presents a gas-liquid mixed state under boiling conditions.
- the surface of the insulator must be The shape curvature and length are designed.
- the insulation device used in a gas-liquid mixed medium includes: a first insulator section 1, a second insulator section 2 and a third insulator section 3.
- first insulator section 1 and the second insulator section 2 are both truncated cone-shaped.
- the third insulator section 3 is cylindrical. That is, the first insulator section 1, the second insulator section 2, and the third insulator section 3 are all composed of two circular bottom surfaces and side surfaces. And the diameters of the upper bottom surfaces of the first insulator section 1 and the second insulator section 2 are smaller than the diameters of the lower bottom surfaces. The diameters of the two ground surfaces of the third insulator section 3 are equal.
- the upper bottom surface of the first insulator segment 1 is connected to the high-potential metal body 4 , and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment 2 .
- One bottom surface of the third insulator section 3 is connected to the low-potential metal body 5 , and the other bottom surface is fixed to the upper bottom surface of the second insulator section 2 .
- the side surfaces of the first insulator section 1, the second insulator section 2 and the third insulator section 3 are all in the shape of sinusoidal function curves in the axial direction.
- the side surfaces of the first insulator section 1, the second insulator section 2 and the third insulator section 3 are all sinusoidal in the axial direction, the first insulator section 1 and the third insulator section 3
- the second insulator section 2 is approximately truncated, and the third insulator section 3 is approximately cylindrical.
- the first insulator section 1 Since the first insulator section 1 is adjacent to a high voltage area, the field intensity in this area is high. In order to improve the field strength distribution, the first insulator section 1 adopts a structure similar to a circular cone, and in order to increase the creepage distance, a sinusoidal function curve shape is adopted on the side of the circular cone.
- the third insulator section 3 is far away from the high field intensity area, so it adopts a cylindrical structure and the surface adopts a sinusoidal function curve shape.
- the diameter h 1 of the upper bottom surface of the first insulator segment 1 is greater than or equal to the diameter d of the high-potential metal body 4 . If (U H is the potential of the high-potential metal body 4, U L is the potential of the low-potential metal body 5, both units are kV), then h 1 is taken (unit is cm).
- the diameter of the lower bottom surface of the second insulator segment 2 is equal to the diameter of the lower bottom surface of the first insulator segment 1 .
- the diameter of the upper bottom surface of the second insulator section 2 is equal to the diameter of the upper bottom surface of the first insulator section 1 .
- the bottom surface diameter h 3 of the third insulator section 3 is equal to the upper bottom surface diameter of the second insulator section 2 .
- the axial curve length of the side of the first insulator segment 1 (the side curve of the first insulator segment 1 from the surface immediately adjacent to the high-potential metal body 4 to the largest diameter) is:
- l 1 is the axial curve length of the side of the first insulator section
- h 2 is the lower bottom diameter of the first insulator section
- h 1 is the upper bottom diameter of the first insulator section.
- the axial curve function of the side of the first insulator section is:
- x 1 is the distance between the upper bottom surface of the first insulator segment and the lower bottom surface of the first insulator segment, and the variation range is 0 to l 1 .
- A is controlled by the boiling degree of the liquid. When the phase change medium boils, the maximum bubble diameter is r 0 .
- the length of the first insulator segment 1 (the projection of l 1 ) is d 1
- the length of the second insulator segment 2 is d 2 (the projection of the axial curve length l 2 on the side of the second insulator segment 2)
- the length of the first insulator segment 1 is d 1
- the length of the third insulator section 3 is d 3 (the projection of the axial curve length l 3 on the side of the third insulator section 3).
- the axial curve function of the side of the second insulator segment 2 is the same as the axial curve function of the side of the first insulator segment 1, but in opposite directions.
- the axial curve function of the third insulator section 3 side is:
- x 2 is the distance between the upper bottom surface of the second insulator segment and the low-potential metal body, and the variation range is 0 to d 3 .
- l 1 is the length of the axial curve on the side of the first insulator section
- d 3 is the projected length of the axial curve on the side of the third insulator section
- l 1 is the axial curve length of the side of the first insulator segment
- ceiling() is the upward rounding function.
- the value of N is determined by the creepage distance.
- the breakdown field strength of the phase change heat medium in the liquid state is E (unit is kV/mm), and the field strength in the bubble after the phase change heat medium boils and vaporizes is kE. (usually preferable ).
- the creepage length of the insulation device of the present invention is l 0 , then the shortest creepage length of the insulation device of the present invention is In the formula, p is the boiling degree of the phase change heat medium liquid, which represents the proportion of liquid after the phase change heat medium boils.
- N is The integer part of plus one.
- the present invention considers the gas-liquid mixed state bubble size, bubble density, and the angle of electric field change inside and outside the bubble, and separately designs the insulator surface curvature, the insulator creepage length, and the voltage equalizing ring in the high field intensity area at the end of the insulator, thereby improving the performance of the insulator in the gas. Insulating properties in liquid mixed media.
- This embodiment takes the structure used in the 100kV valve section as an example. That is,
- the breakdown field strength of the phase change heat medium in the liquid state is 15kV/mm, and the field strength in the bubble after the medium boils and vaporizes is 5kV/mm, that is After boiling, the liquid volume accounts for 90%.
- d 3 is calculated according to l T -2l 1 , and the result is a negative number, indicating that the third insulator section is not needed.
- This embodiment takes the structure used in the 500kV valve section as an example. That is
- the breakdown field strength of the phase change heat medium in the liquid state is 15kV/mm, and the field strength in the bubble after the medium boils and vaporizes is 5kV/mm, that is After boiling, the liquid volume accounts for 90%.
- d 3 is calculated according to l T -2l 1 , and the result is 28.57cm.
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Abstract
An insulating device used in a gas-liquid mixed medium, which belongs to the field of high-voltage insulation. The insulating device comprises a first insulator section, a second insulator section and a third insulator section, wherein the first insulator section and the second insulator section are both in the shape of a circular truncated cone; the third insulator section is cylindrical; an upper bottom face of the first insulator section is connected to a high-potential metal body, and a lower bottom face thereof is fixed to a lower bottom face of the second insulator section; one bottom face of the third insulator section is connected to a low-potential metal body, and the other bottom face thereof is fixed to an upper bottom face of the second insulator section; and a side face of the first insulator section, a side face of the second insulator section and a side face of the third insulator section are each in the shape of a sine function curve in an axial direction. The problem of a reduction in the insulation performance caused by accumulation of a gas-liquid mixed medium on a surface of the insulating device is avoided, thereby improving the insulation performance of the insulating device in the gas-liquid mixed medium.
Description
本申请要求于2022年09月15日提交中国专利局、申请号为202211124115.2、发明名称为“一种用于气液混合态介质内的绝缘装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application submitted to the China Patent Office on September 15, 2022, with the application number 202211124115.2 and the invention title "An insulation device for gas-liquid mixed media". All its contents are approved. This reference is incorporated into this application.
本发明涉及高压绝缘领域，特别是涉及一种用于气液混合态介质内的绝缘装置。The invention relates to the field of high-voltage insulation, and in particular to an insulation device used in a gas-liquid mixed medium.
氟碳化合物等绝缘性能优异、不可燃、化学稳定性好，并且沸点较低(40—70℃)的材料，在相变(液—气)过程会带走大量的热量，因此在水轮发电机、大数据中心的计算机散热方面得到应用。通常将这类借助相变换热过程实现对装置冷却散热的材料称为相变换热介质。这类介质在高压设备的散热领域应用还不成熟，目前只在电力变压器、电容器、换流阀等设备中进行了初步探索，尚未得到广泛应用。Materials such as fluorocarbons that have excellent insulation properties, are non-flammable, have good chemical stability, and have a low boiling point (40-70°C) will take away a large amount of heat during the phase change (liquid-to-gas) process, so they are not suitable for hydropower generation. It has been applied in computer cooling of machines and big data centers. This type of material that cools and dissipates heat from the device through a phase change heat process is usually called a phase change heat medium. The application of this type of medium in the field of heat dissipation of high-voltage equipment is not yet mature. At present, it has only been initially explored in power transformers, capacitors, converter valves and other equipment, and has not yet been widely used.
换流阀等高压直流输电装备对于具有高可靠性的散热***具有重要需求，以用于换流阀冷却的去离子水冷***为例。据统计，在3年时间内换流阀发生的47次紧急重大缺陷中，水冷***21次(45％)。经过分析，其主要原因是渗漏水(9次)、水泵故障(7次)及阀冷控制器故障(5次)。其原因在于以水为冷却介质的散热***在发生渗漏后，往往导致绝缘失效；并且水冷***设备较多，控制复杂，这都会导致换流阀故障率增加。氟碳化合物等材料具有优异的绝缘特性和化学稳定性，如果将相变过程用于散热可以对换流阀***的制冷技术实现根本性的革新。但是由于涉及到换流阀***的具体设计时，内绝缘结构设计、外绝缘配合、不相容材料选型、型式试验方法、运维检修方法等领域都存在没有解决的技术问题，尚未形成支撑***长期可靠运行的技术。High-voltage DC transmission equipment such as converter valves have important requirements for high-reliability heat dissipation systems. Take the deionized water cooling system used for converter valve cooling as an example. According to statistics, among the 47 emergency major defects in converter valves within 3 years, 21 (45%) were in the water cooling system. After analysis, the main reasons were water leakage (9 times), water pump failure (7 times) and valve cooling controller failure (5 times). The reason is that leakage in the cooling system using water as the cooling medium often leads to insulation failure; and the water cooling system has many equipment and complex control, which will lead to an increase in the failure rate of the converter valve. Materials such as fluorocarbons have excellent insulation properties and chemical stability. If the phase change process is used for heat dissipation, it can achieve fundamental innovation in the refrigeration technology of the converter valve system. However, when it comes to the specific design of the converter valve system, there are unsolved technical problems in the fields of internal insulation structure design, external insulation coordination, incompatible material selection, type test methods, operation and maintenance methods, etc., and support has not yet been formed. Technology for long-term reliable operation of the system.
发明内容Contents of the invention
本发明的目的是提供一种用于气液混合态介质内的绝缘装置，可避免气液混合态介质在绝缘装置表面聚集导致绝缘性能下降的问题。The object of the present invention is to provide an insulation device used in a gas-liquid mixed medium, which can avoid the problem of the accumulation of the gas-liquid mixed medium on the surface of the insulation device, resulting in a decrease in insulation performance.
为实现上述目的，本发明提供了如下方案：In order to achieve the above objects, the present invention provides the following solutions:
一种用于气液混合态介质内的绝缘装置，包括：第一绝缘子段、第二绝缘子段及第三绝缘子段；An insulation device used in a gas-liquid mixed medium, including: a first insulator section, a second insulator section and a third insulator section;
所述第一绝缘子段和所述第二绝缘子段均为圆台形；所述第三绝缘子段为圆柱形；The first insulator section and the second insulator section are both truncated cone-shaped; the third insulator section is cylindrical;
所述第一绝缘子段的上底面与高电位金属体连接，下底面与第二绝缘子段的下底面固定；The upper bottom surface of the first insulator segment is connected to the high-potential metal body, and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment;
所述第三绝缘子段的一个底面与低电位金属体连接，另一个底面与第二绝缘子段的上底面固定；One bottom surface of the third insulator section is connected to the low-potential metal body, and the other bottom surface is fixed to the upper bottom surface of the second insulator section;
所述第一绝缘子段的侧面、所述第二绝缘子段的侧面及所述第三绝缘子段的侧面在轴向上均为正弦函数曲线形状。The side surfaces of the first insulator section, the side surfaces of the second insulator section and the side surfaces of the third insulator section are all in the shape of sinusoidal function curves in the axial direction.
可选地，所述第一绝缘子段的上底面直径大于或等于高电位金属体的直径。Optionally, the diameter of the upper bottom surface of the first insulator section is greater than or equal to the diameter of the high-potential metal body.
可选地，所述第一绝缘子段的下底面直径为所述第一绝缘子段的上底面直径的2倍。Optionally, the diameter of the lower bottom surface of the first insulator section is twice the diameter of the upper bottom surface of the first insulator section.
可选地，所述第二绝缘子段的下底面直径与所述第一绝缘子段的下底面直径相等；所述第二绝缘子段的上底面直径与所述第一绝缘子段的上底面直径相等。Optionally, the diameter of the lower bottom surface of the second insulator section is equal to the diameter of the lower bottom surface of the first insulator section; the diameter of the upper bottom surface of the second insulator section is equal to the diameter of the upper bottom surface of the first insulator section.
可选地，所述第三绝缘子段的底面直径与所述第二绝缘子段的上底面直径相等。Optionally, the diameter of the bottom surface of the third insulator section is equal to the diameter of the upper bottom surface of the second insulator section.
可选地，所述第一绝缘子段侧面的轴向曲线长度为：Optionally, the axial curve length of the side of the first insulator section is:
其中，l
1为第一绝缘子段侧面的轴向曲线长度，h
2为第一绝缘子段的下底直径，h
1为第一绝缘子段的上底直径。
Among them, l 1 is the axial curve length of the side of the first insulator section, h 2 is the lower bottom diameter of the first insulator section, and h 1 is the upper bottom diameter of the first insulator section.
可选地，所述第一绝缘子段侧面的轴向曲线函数为：Optionally, the axial curve function of the side of the first insulator segment is:
其中，x
1为第一绝缘子段的上底面与第一绝缘子段的下底面之间的距离，
r
0为介质沸腾时的最大气泡直径，l
1为第一绝缘子段侧面的轴向曲线长度；若A的取值范围不存在，则第一绝缘子段的侧面采用直线。
Where, x 1 is the distance between the upper bottom surface of the first insulator section and the lower bottom surface of the first insulator section, r 0 is the maximum bubble diameter when the medium is boiling, l 1 is the axial curve length of the side of the first insulator section; if the value range of A does not exist, the side of the first insulator section adopts a straight line.
可选地，所述第二绝缘子段侧面的轴向曲线函数与所述第一绝缘子段侧面的轴向曲线函数的方向相反。Optionally, the direction of the axial curve function of the side of the second insulator segment is opposite to the direction of the axial curve function of the side of the first insulator segment.
可选地，所述第三绝缘子段侧面的轴向曲线函数为：Optionally, the axial curve function of the side of the third insulator section is:
其中，x
2为第二绝缘子段的上底面与低电位金属体之间的距离，
l
1为第一绝缘子段侧面的轴向曲线长度，d
3为第三绝缘子段侧面的轴向曲线的投影长度，
l
1为第一绝缘子段侧面的轴向曲线长度，ceiling()为向上舍入函数，d
3＝l
T-2l
1，l
T为绝缘装置的最短爬电长度，
E为相变换热介质在液态情况下的击穿场强，l
0为耐受电压为|U
H-U
L|的绝缘子的爬电长度，U
H为高电位金属体的电位，U
L为低电位金属体的电位，p为相变换热介质液体的沸腾程度，k为系数，kE为相变换热介质沸腾汽化后气泡内的场强。
Among them, x 2 is the distance between the upper bottom surface of the second insulator segment and the low-potential metal body, l 1 is the length of the axial curve on the side of the first insulator section, d 3 is the projected length of the axial curve on the side of the third insulator section, l 1 is the axial curve length of the side of the first insulator section, ceiling() is an upward rounding function, d 3 =l T -2l 1 , l T is the shortest creepage length of the insulation device, E is the breakdown field strength of the phase-change thermal medium in the liquid state, l 0 is the creepage length of the insulator with a withstand voltage of |U H -U L |, U H is the potential of the high-potential metal body, U L is the potential of the low-potential metal body, p is the boiling degree of the phase-change heat medium liquid, k is the coefficient, and kE is the field strength in the bubble after the phase-change heat medium boils and vaporizes.
根据本发明提供的具体实施例，本发明公开了以下技术效果：通过设置两个圆台形的绝缘子段及一个圆柱形的绝缘子段，且三个绝缘子段的侧 面在轴向上均为正弦函数曲线形状，第一绝缘子段的上底面与高电位金属体连接，下底面与第二绝缘子段的下底面固定；第三绝缘子段的一个底面与低电位金属体连接，另一个底面与第二绝缘子段的上底面固定，避免了气液混合态介质在绝缘装置表面聚集导致绝缘性能下降的问题，即提高了绝缘装置在气液混合态介质内的绝缘性能。According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: by arranging two truncated cone-shaped insulator segments and one cylindrical insulator segment, and the side surfaces of the three insulator segments are all sinusoidal function curves in the axial direction. Shape, the upper bottom surface of the first insulator segment is connected to the high-potential metal body, and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment; one bottom surface of the third insulator segment is connected to the low-potential metal body, and the other bottom surface is connected to the second insulator segment The upper bottom surface is fixed, which avoids the problem that the gas-liquid mixed medium accumulates on the surface of the insulation device and causes the insulation performance to decrease, that is, the insulation performance of the insulation device in the gas-liquid mixed medium is improved.
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
图1为本发明用于气液混合态介质内的绝缘装置的整体示意图。Figure 1 is an overall schematic diagram of an insulation device used in a gas-liquid mixed medium according to the present invention.
符号说明：Symbol Description:
第一绝缘子段-1，第二绝缘子段-2，第三绝缘子段-3，高电位金属体-4，低电位金属体-5。The first insulator section-1, the second insulator section-2, the third insulator section-3, the high-potential metal body-4, and the low-potential metal body-5.
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
本发明的目的是提供一种用于气液混合态介质内的绝缘装置，通过合理设置三个绝缘子段的形状，避免了气液混合态介质在绝缘装置表面聚集导致绝缘性能下降的问题，即提高了绝缘装置在气液混合态介质内的绝缘性能。The purpose of the present invention is to provide an insulation device for use in a gas-liquid mixed medium. By reasonably setting the shapes of the three insulator segments, the problem of aggregation of the gas-liquid mixed medium on the surface of the insulating device resulting in a decrease in insulation performance is avoided. That is, The insulation performance of the insulation device in the gas-liquid mixed medium is improved.
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附 图和具体实施方式对本发明作进一步详细的说明。In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
本发明以应用相变换热介质情况下，换流阀内部浸没在相变换热介质中的绝缘子为对象，设计了一种绝缘装置。通常设计的空气绝缘子多为伞裙结构，只需要考虑两端承受高压情况下的绝缘性能即可。本发明提供的绝缘装置除了考虑保证绝缘性能的爬电距离外，重点针对相变换热介质在沸腾情况下呈现气液混合状态，为了避免气泡在绝缘子表面聚集导致绝缘性能下降，对绝缘子表面的外形曲率和长度进行了设计。The present invention designs an insulation device for the insulator in which the inside of the converter valve is immersed in the phase-change heat medium when a phase-change heat medium is used. Usually designed air insulators are mostly shed structures, and only need to consider the insulation performance when both ends are subjected to high voltage. In addition to considering the creepage distance to ensure the insulation performance, the insulation device provided by the present invention focuses on the fact that the phase-change heat medium presents a gas-liquid mixed state under boiling conditions. In order to avoid the accumulation of bubbles on the surface of the insulator resulting in the degradation of the insulation performance, the surface of the insulator must be The shape curvature and length are designed.
如图1所示，本发明用于气液混合态介质内的绝缘装置包括：第一绝缘子段1、第二绝缘子段2及第三绝缘子段3。As shown in Figure 1, the insulation device used in a gas-liquid mixed medium according to the present invention includes: a first insulator section 1, a second insulator section 2 and a third insulator section 3.
其中，所述第一绝缘子段1和所述第二绝缘子段2均为圆台形。所述第三绝缘子段3为圆柱形。即第一绝缘子段1、第二绝缘子段2、第三绝缘子段3均由两个圆形底面及侧面构成。且第一绝缘子段1和第二绝缘子段2的上底面的直径均小于下底面的直径。第三绝缘子段3的两个地面的直径相等。Wherein, the first insulator section 1 and the second insulator section 2 are both truncated cone-shaped. The third insulator section 3 is cylindrical. That is, the first insulator section 1, the second insulator section 2, and the third insulator section 3 are all composed of two circular bottom surfaces and side surfaces. And the diameters of the upper bottom surfaces of the first insulator section 1 and the second insulator section 2 are smaller than the diameters of the lower bottom surfaces. The diameters of the two ground surfaces of the third insulator section 3 are equal.
所述第一绝缘子段1的上底面与高电位金属体4连接，下底面与第二绝缘子段2的下底面固定。The upper bottom surface of the first insulator segment 1 is connected to the high-potential metal body 4 , and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment 2 .
所述第三绝缘子段3的一个底面与低电位金属体5连接，另一个底面与第二绝缘子段2的上底面固定。One bottom surface of the third insulator section 3 is connected to the low-potential metal body 5 , and the other bottom surface is fixed to the upper bottom surface of the second insulator section 2 .
所述第一绝缘子段1的侧面、所述第二绝缘子段2的侧面及所述第三绝缘子段3的侧面在轴向上均为正弦函数曲线形状。The side surfaces of the first insulator section 1, the second insulator section 2 and the third insulator section 3 are all in the shape of sinusoidal function curves in the axial direction.
实际上，由于第一绝缘子段1的侧面、所述第二绝缘子段2的侧面及所述第三绝缘子段3的侧面在轴向上均为正弦函数曲线形状，所以第一绝缘子段1和第二绝缘子段2是近似圆台形，第三绝缘子段3是近似圆柱形。In fact, since the side surfaces of the first insulator section 1, the second insulator section 2 and the third insulator section 3 are all sinusoidal in the axial direction, the first insulator section 1 and the third insulator section 3 The second insulator section 2 is approximately truncated, and the third insulator section 3 is approximately cylindrical.
由于第一绝缘子段1邻近高电压区域，该区域场强高。为了改善场强分布，第一绝缘子段1采用近似圆台的结构，同时为了提高爬电距离，在圆台侧面采用正弦函数曲线形状。而第三绝缘子段3距离高场强区域较远，因此采用圆柱结构，表面采用正弦函数曲线形状。Since the first insulator section 1 is adjacent to a high voltage area, the field intensity in this area is high. In order to improve the field strength distribution, the first insulator section 1 adopts a structure similar to a circular cone, and in order to increase the creepage distance, a sinusoidal function curve shape is adopted on the side of the circular cone. The third insulator section 3 is far away from the high field intensity area, so it adopts a cylindrical structure and the surface adopts a sinusoidal function curve shape.
在本实施例中，第一绝缘子段1的上底面直径h
1大于或等于高电位金 属体4的直径d。如果
(U
H为高电位金属体4的电位，U
L为低电位金属体5的电位，两者单位均为kV)，则h
1取
(单位为cm)。
In this embodiment, the diameter h 1 of the upper bottom surface of the first insulator segment 1 is greater than or equal to the diameter d of the high-potential metal body 4 . if (U H is the potential of the high-potential metal body 4, U L is the potential of the low-potential metal body 5, both units are kV), then h 1 is taken (unit is cm).
第一绝缘子段1的下底面直径h
2(即第一绝缘子段1部分的最大直径)为第一绝缘子段1的上底面直径h
1的2倍：h
2＝2h
1。
The lower bottom diameter h 2 of the first insulator segment 1 (that is, the maximum diameter of the first insulator segment 1 part) is twice the upper bottom diameter h 1 of the first insulator segment 1: h 2 =2h 1 .
第二绝缘子段2的下底面直径与第一绝缘子段1的下底面直径相等。The diameter of the lower bottom surface of the second insulator segment 2 is equal to the diameter of the lower bottom surface of the first insulator segment 1 .
第二绝缘子段2的上底面直径与第一绝缘子段1的上底面直径相等。The diameter of the upper bottom surface of the second insulator section 2 is equal to the diameter of the upper bottom surface of the first insulator section 1 .
第三绝缘子段3的底面直径h
3与第二绝缘子段2的上底面直径相等。即
The bottom surface diameter h 3 of the third insulator section 3 is equal to the upper bottom surface diameter of the second insulator section 2 . Right now
具体地，第一绝缘子段1侧面的轴向曲线长度(第一绝缘子段1由紧邻高电位金属体4的表面到最大直径的侧面曲线)为：Specifically, the axial curve length of the side of the first insulator segment 1 (the side curve of the first insulator segment 1 from the surface immediately adjacent to the high-potential metal body 4 to the largest diameter) is:
其中，l
1为第一绝缘子段侧面的轴向曲线长度，h
2为第一绝缘子段的下底直径，h
1为第一绝缘子段的上底直径。
Among them, l 1 is the axial curve length of the side of the first insulator section, h 2 is the lower bottom diameter of the first insulator section, and h 1 is the upper bottom diameter of the first insulator section.
第一绝缘子段侧面的轴向曲线函数为：The axial curve function of the side of the first insulator section is:
其中，x
1为第一绝缘子段的上底面与第一绝缘子段的下底面之间的距离，变化范围是0到l
1。A由液体的沸腾程度控制，相变介质沸腾时最大气泡直径为r
0，A的取值范围为5r
0<A<l
1/6。在实际应用中，如果气泡较大，导致A的取值范围不存在，则第一绝缘子段的侧面采用直线。另外，如果A>5r
0，则直接取A＝l
1/6。
Among them, x 1 is the distance between the upper bottom surface of the first insulator segment and the lower bottom surface of the first insulator segment, and the variation range is 0 to l 1 . A is controlled by the boiling degree of the liquid. When the phase change medium boils, the maximum bubble diameter is r 0 . The value range of A is 5r 0 <A<l 1 /6. In practical applications, if the bubble is large and the value range of A does not exist, the side of the first insulator segment adopts a straight line. In addition, if A>5r 0 , then directly take A=l 1 /6.
图1中，第一绝缘子段1的长度(l
1的投影)为d
1，第二绝缘子段2的长度为d
2(第二绝缘子段2侧面的轴向曲线长度l
2的投影)，第三绝缘子段3的长度为d
3(第三绝缘子段3侧面的轴向曲线长度l
3的投影)。
In Figure 1, the length of the first insulator segment 1 (the projection of l 1 ) is d 1 , the length of the second insulator segment 2 is d 2 (the projection of the axial curve length l 2 on the side of the second insulator segment 2), and the length of the first insulator segment 1 is d 1 . The length of the third insulator section 3 is d 3 (the projection of the axial curve length l 3 on the side of the third insulator section 3).
第二绝缘子段2侧面的轴向曲线函数与第一绝缘子段1侧面的轴向曲线函数相同，方向相反。The axial curve function of the side of the second insulator segment 2 is the same as the axial curve function of the side of the first insulator segment 1, but in opposite directions.
第三绝缘子段3侧面的轴向曲线函数为：The axial curve function of the third insulator section 3 side is:
其中，x
2为第二绝缘子段的上底面与低电位金属体之间的距离，变化范围是0到d
3，
l
1为第一绝缘子段侧面的轴向曲线长度，d
3为第三绝缘子段侧面的轴向曲线的投影长度，
l
1为第一绝缘子段侧面的轴向曲线长度，ceiling()为向上舍入函数。
Among them, x 2 is the distance between the upper bottom surface of the second insulator segment and the low-potential metal body, and the variation range is 0 to d 3 . l 1 is the length of the axial curve on the side of the first insulator section, d 3 is the projected length of the axial curve on the side of the third insulator section, l 1 is the axial curve length of the side of the first insulator segment, and ceiling() is the upward rounding function.
具体地，N的取值由爬电距离确定。相变换热介质在液态情况下的击穿场强为E(单位为kV/mm)，相变换热介质沸腾汽化后气泡内的场强为kE。(通常可取
)。
Specifically, the value of N is determined by the creepage distance. The breakdown field strength of the phase change heat medium in the liquid state is E (unit is kV/mm), and the field strength in the bubble after the phase change heat medium boils and vaporizes is kE. (usually preferable ).
参照目前空气绝缘情况下的绝缘子爬电长度的设计原则，对于耐受电压为|U
H-U
L|的绝缘子，其爬电长度为l
0，则本发明绝缘装置的爬电长度最短为
式中，p为相变换热介质液体的沸腾程度，表示相变换热介质沸腾后液体的占比。
Referring to the current design principles of the creepage length of insulators under air insulation, for an insulator with a withstand voltage of |U H - U L |, the creepage length is l 0 , then the shortest creepage length of the insulation device of the present invention is In the formula, p is the boiling degree of the phase change heat medium liquid, which represents the proportion of liquid after the phase change heat medium boils.
因此d
3取为l
T-2l
1。
Therefore d 3 is taken as l T -2l 1 .
基于上述表达式，
即：N为
的整数部分加一。
Based on the above expression, That is: N is The integer part of plus one.
本发明在考虑气液混合态气泡大小、气泡密度、气泡内外电场变化的角度，分别设计了绝缘子表面曲率、绝缘子爬电长度和绝缘子端部高场强区域的均压环，提高了绝缘子在气液混合态介质内的绝缘性能。The present invention considers the gas-liquid mixed state bubble size, bubble density, and the angle of electric field change inside and outside the bubble, and separately designs the insulator surface curvature, the insulator creepage length, and the voltage equalizing ring in the high field intensity area at the end of the insulator, thereby improving the performance of the insulator in the gas. Insulating properties in liquid mixed media.
为了更好的理解本发明的方案，下面结合具体实施例进一步进行说明。In order to better understand the solution of the present invention, further description will be given below in conjunction with specific examples.
本实施例以用于100kV阀段内的的结构为例。即|U
H-U
L|为100kV。
This embodiment takes the structure used in the 100kV valve section as an example. That is, |U H -U L | is 100kV.
(1)h
1：不考虑高电位金属体直径d的取值，h
1＝5cm。
(1) h 1 : Regardless of the value of the diameter d of the high-potential metal body, h 1 =5cm.
(2)h
2：第一绝缘子段部分的最大直径，h
2＝10cm。
(2)h 2 : The maximum diameter of the first insulator segment, h 2 =10cm.
(3)h
3：第三绝缘子段部分的最大直径，h
3＝5cm。
(3)h 3 : The maximum diameter of the third insulator segment, h 3 =5cm.
(4)l
1：l
1的投影长度为d
1，l
1＝10cm。l
1的曲线函数为
如果气泡较小，
(4) l 1 : The projected length of l 1 is d 1 , l 1 =10cm. The curve function of l 1 is If the bubbles are smaller,
(5)l
2：曲线函数与l
1相同，方向相反。
(5)l 2 : The curve function is the same as l 1 , but in the opposite direction.
(6)l
3：l
3的曲线函数为
(6)l 3 : The curve function of l 3 is
相变换热介质在液态情况下的击穿场强为15kV/mm，介质沸腾汽化后气泡内的场强为5kV/mm，即
沸腾后液体体积占比为90％。
The breakdown field strength of the phase change heat medium in the liquid state is 15kV/mm, and the field strength in the bubble after the medium boils and vaporizes is 5kV/mm, that is After boiling, the liquid volume accounts for 90%.
如果爬电长度l
0＝80cm，则：
If the creepage length l 0 =80cm, then:
此时d
3按照l
T-2l
1计算，结果为负数，说明不需要第三绝缘子段。
At this time, d 3 is calculated according to l T -2l 1 , and the result is a negative number, indicating that the third insulator section is not needed.
本实施例以用于500kV阀段内的的结构为例。即|U
H-U
L|为500kV。
This embodiment takes the structure used in the 500kV valve section as an example. That is |U H -U L | is 500kV.
(1)h
1：不考虑高电位金属体直径d的取值，h
1＝25cm。
(1) h 1 : Regardless of the value of the diameter d of the high-potential metal body, h 1 =25cm.
(2)h
2：第一绝缘子段部分的最大直径，h
2＝50cm。
(2)h 2 : The maximum diameter of the first insulator segment, h 2 =50cm.
(3)h
3：第三绝缘子段部分的最大直径，h
3＝25cm。
(3)h 3 : The maximum diameter of the third insulator segment, h 3 =25cm.
(4)l
1：l
1的投影长度为d
1，l
1＝50cm。l
1的曲线函数为
如果气泡较小，
(4) l 1 : The projected length of l 1 is d 1 , l 1 =50cm. The curve function of l 1 is If the bubbles are smaller,
(5)l
2：函数与l1相同，方向相反。
(5)l 2 : The function is the same as l1, but in the opposite direction.
(6)l
3：曲线函数为
(6)l 3 : The curve function is
相变换热介质在液态情况下的击穿场强为15kV/mm，介质沸腾汽化后气泡内的场强为5kV/mm，即
沸腾后液体体积占比为90％。
The breakdown field strength of the phase change heat medium in the liquid state is 15kV/mm, and the field strength in the bubble after the medium boils and vaporizes is 5kV/mm, that is After boiling, the liquid volume accounts for 90%.
如果爬电长度l
0＝600cm，则：
If the creepage length l 0 =600cm, then:
此时d
3按照l
T-2l
1计算，结果为28.57cm。
At this time, d 3 is calculated according to l T -2l 1 , and the result is 28.57cm.
因此N按照
计算，结果为2。
Therefore N follows Calculated, the result is 2.
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本发明的限制。This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and the core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the present invention There will be changes in the specific implementation methods and application scope of the ideas. In summary, the contents of this description should not be construed as limitations of the present invention.
Claims (9)
- 一种用于气液混合态介质内的绝缘装置，其特征在于，所述用于气液混合态介质内的绝缘装置包括：第一绝缘子段、第二绝缘子段及第三绝缘子段；An insulating device used in a gas-liquid mixed medium, characterized in that the insulating device used in a gas-liquid mixed medium includes: a first insulator section, a second insulator section and a third insulator section;所述第一绝缘子段和所述第二绝缘子段均为圆台形；所述第三绝缘子段为圆柱形；The first insulator section and the second insulator section are both truncated cone-shaped; the third insulator section is cylindrical;所述第一绝缘子段的上底面与高电位金属体连接，下底面与第二绝缘子段的下底面固定；The upper bottom surface of the first insulator segment is connected to the high-potential metal body, and the lower bottom surface is fixed to the lower bottom surface of the second insulator segment;所述第三绝缘子段的一个底面与低电位金属体连接，另一个底面与第二绝缘子段的上底面固定；One bottom surface of the third insulator section is connected to the low-potential metal body, and the other bottom surface is fixed to the upper bottom surface of the second insulator section;所述第一绝缘子段的侧面、所述第二绝缘子段的侧面及所述第三绝缘子段的侧面在轴向上均为正弦函数曲线形状。The side surfaces of the first insulator section, the side surfaces of the second insulator section and the side surfaces of the third insulator section are all in the shape of sinusoidal function curves in the axial direction.
- 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第一绝缘子段的上底面直径大于或等于高电位金属体的直径。The insulation device used in a gas-liquid mixed medium according to claim 1, wherein the diameter of the upper bottom surface of the first insulator segment is greater than or equal to the diameter of the high-potential metal body.
- 根据权利要求1或2所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第一绝缘子段的下底面直径为所述第一绝缘子段的上底面直径的2倍。The insulation device used in a gas-liquid mixed medium according to claim 1 or 2, characterized in that the diameter of the lower bottom surface of the first insulator section is twice the diameter of the upper bottom surface of the first insulator section.
- 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第二绝缘子段的下底面直径与所述第一绝缘子段的下底面直径相等；所述第二绝缘子段的上底面直径与所述第一绝缘子段的上底面直径相等。The insulation device used in a gas-liquid mixed medium according to claim 1, characterized in that the diameter of the lower bottom surface of the second insulator section is equal to the diameter of the lower bottom surface of the first insulator section; the second The upper bottom surface diameter of the insulator segment is equal to the upper bottom surface diameter of the first insulator segment.
- 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第三绝缘子段的底面直径与所述第二绝缘子段的上底面直径相等。The insulation device used in a gas-liquid mixed medium according to claim 1, wherein the diameter of the bottom surface of the third insulator section is equal to the diameter of the upper bottom surface of the second insulator section.
- 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第一绝缘子段侧面的轴向曲线长度为：The insulation device used in a gas-liquid mixed medium according to claim 1, characterized in that the axial curve length of the side of the first insulator section is:
其中，l 1为第一绝缘子段侧面的轴向曲线长度，h 2为第一绝缘子段的 下底直径，h 1为第一绝缘子段的上底直径。 Among them, l 1 is the axial curve length of the side of the first insulator section, h 2 is the lower bottom diameter of the first insulator section, and h 1 is the upper bottom diameter of the first insulator section. - 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第一绝缘子段侧面的轴向曲线函数为：The insulation device used in a gas-liquid mixed medium according to claim 1, characterized in that the axial curve function of the side of the first insulator section is:
其中，x 1为第一绝缘子段的上底面与第一绝缘子段的下底面之间的距离，r 0为介质沸腾时的最大气泡直径，l 1为第一绝缘子段侧面的轴向曲线长度；若A的取值范围不存在，则第一绝缘子段的侧面采用直线。 Where, x 1 is the distance between the upper bottom surface of the first insulator section and the lower bottom surface of the first insulator section,
r 0 is the maximum bubble diameter when the medium is boiling, l 1 is the axial curve length of the side of the first insulator section; if the value range of A does not exist, the side of the first insulator section adopts a straight line. - 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第二绝缘子段侧面的轴向曲线函数与所述第一绝缘子段侧面的轴向曲线函数的方向相反。The insulation device used in a gas-liquid mixed medium according to claim 1, wherein the direction of the axial curve function of the side of the second insulator section is the same as the direction of the axial curve function of the side of the first insulator section. on the contrary.
- 根据权利要求1所述的用于气液混合态介质内的绝缘装置，其特征在于，所述第三绝缘子段侧面的轴向曲线函数为：The insulation device used in a gas-liquid mixed medium according to claim 1, characterized in that the axial curve function of the side of the third insulator section is:
其中，x 2为第二绝缘子段的上底面与低电位金属体之间的距离，l 1为第一绝缘子段侧面的轴向曲线长度，d 3为第三绝缘子段侧面的轴向曲线的投影长度，
l 1为第一绝缘子段侧面的轴向曲线长度，ceiling()为向上舍入函数，d 3＝l T-2l 1，l T为绝缘装置的最短爬电长度，
E为相变换热介质在液态情况下的击穿场强，l 0为耐受电压为|U H-U L|的绝缘子的爬电长度，U H为高电位金属体的电位，U L为低电位金属体的电位，p为相变换热介质液体的沸腾程度，k为系数，kE为相变换热介质沸腾汽化后气泡内的场强。 Among them, x 2 is the distance between the upper bottom surface of the second insulator segment and the low-potential metal body,
l 1 is the length of the axial curve on the side of the first insulator section, d 3 is the projected length of the axial curve on the side of the third insulator section,l 1 is the axial curve length of the side of the first insulator section, ceiling() is an upward rounding function, d 3 =l T -2l 1 , l T is the shortest creepage length of the insulation device,E is the breakdown field strength of the phase-change thermal medium in the liquid state, l 0 is the creepage length of the insulator with a withstand voltage of |U H -U L |, U H is the potential of the high-potential metal body, U L is the potential of the low-potential metal body, p is the boiling degree of the phase-change heat medium liquid, k is the coefficient, and kE is the field strength in the bubble after the phase-change heat medium boils and vaporizes.
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| CN202211124115.2A CN115472355A (en) | 2022-09-15 | 2022-09-15 | Insulation device used in gas-liquid mixed medium |
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| US6028269A (en) * | 1994-12-28 | 2000-02-22 | Ngk Insulators, Ltd. | Set of hollow and tapered composite insulators with a one piece core |
| CN2699555Y (en) * | 2004-05-27 | 2005-05-11 | 上海精实电缆附件有限公司 | 110KV silicon rubber integral prefabricated outdoor terminal |
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| CN111403364A (en) * | 2020-03-18 | 2020-07-10 | 南方电网科学研究院有限责任公司 | Immersed converter valve device |
| CN114566413A (en) * | 2020-11-27 | 2022-05-31 | 中国科学院微电子研究所 | Insulator and ion source and ion implantation device formed by insulator |
| CN115472355A (en) * | 2022-09-15 | 2022-12-13 | 南方电网科学研究院有限责任公司 | Insulation device used in gas-liquid mixed medium |
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- 2022-09-15 CN CN202211124115.2A patent/CN115472355A/en active Pending
- 2022-12-15 WO PCT/CN2022/139324 patent/WO2024055460A1/en unknown
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| US6028269A (en) * | 1994-12-28 | 2000-02-22 | Ngk Insulators, Ltd. | Set of hollow and tapered composite insulators with a one piece core |
| CN2699555Y (en) * | 2004-05-27 | 2005-05-11 | 上海精实电缆附件有限公司 | 110KV silicon rubber integral prefabricated outdoor terminal |
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| CN111403364A (en) * | 2020-03-18 | 2020-07-10 | 南方电网科学研究院有限责任公司 | Immersed converter valve device |
| CN114566413A (en) * | 2020-11-27 | 2022-05-31 | 中国科学院微电子研究所 | Insulator and ion source and ion implantation device formed by insulator |
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