CN202903958U - An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer - Google Patents
An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer Download PDFInfo
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- CN202903958U CN202903958U CN 201220663065 CN201220663065U CN202903958U CN 202903958 U CN202903958 U CN 202903958U CN 201220663065 CN201220663065 CN 201220663065 CN 201220663065 U CN201220663065 U CN 201220663065U CN 202903958 U CN202903958 U CN 202903958U
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- 238000009413 insulation Methods 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 230000015556 catabolic process Effects 0.000 title claims abstract description 11
- 238000004382 potting Methods 0.000 claims 4
- 239000012212 insulator Substances 0.000 abstract description 29
- 239000000123 paper Substances 0.000 abstract description 16
- 238000012545 processing Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
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Abstract
变压器油纸绝缘油流下击穿特性试验装置，属于高电压与绝缘技术领域，本实用新型为解决现有耐电强度检验装置由于加工误差致安装困难，且时常有闪络发生的问题。本实用新型包括高压套管、高压套管下连接件、上电极连接件、上电极、上电极绝缘件、下电极绝缘件、绝缘螺杆、绝缘螺帽、下电极、绝缘纸板、油道、接地螺栓、进油口、出油口、进油口连接件和出油口连接件，高压套管下连接件、上电极连接件、上电极、上电极绝缘件、下电极绝缘件、绝缘螺杆、绝缘螺帽、下电极、绝缘纸板、油道和接地螺栓设置在高压试验箱体内，上电极设置在下电极的正上方，上电极嵌入上电极绝缘件内部，下电极嵌入下电极绝缘件内部，上电极绝缘件设置在下电极绝缘件上方。
The utility model relates to a test device for breakdown characteristics of transformer oil paper insulating oil flowing down, which belongs to the technical field of high voltage and insulation. The utility model aims to solve the problem that the existing electric strength test device is difficult to install due to processing errors, and flashovers often occur. The utility model comprises a high-voltage bushing, a lower connecting part of the high-voltage bushing, an upper electrode connecting part, an upper electrode, an upper electrode insulating part, a lower electrode insulating part, an insulating screw rod, an insulating nut, a lower electrode, an insulating cardboard, an oil passage, and a grounding Bolt, oil inlet, oil outlet, oil inlet connector and oil outlet connector, high voltage bushing lower connector, upper electrode connector, upper electrode, upper electrode insulation, lower electrode insulation, insulating screw, The insulating nut, lower electrode, insulating cardboard, oil channel and grounding bolt are set in the high-voltage test box, the upper electrode is set directly above the lower electrode, the upper electrode is embedded in the upper electrode insulation, the lower electrode is embedded in the lower electrode insulation, and the upper electrode is placed in the lower electrode insulation. The electrode insulator is disposed over the lower electrode insulator.
Description
技术领域technical field
本实用新型涉及变压器油纸绝缘油流下击穿特性试验装置，属于高电压与绝缘技术领域。The utility model relates to a breakdown characteristic test device for transformer oil paper insulating oil flowing down, which belongs to the technical field of high voltage and insulation.
背景技术Background technique
随着国民经济的持续增长、对能源需求日益提高，高电压远距离输电已成为影响经济发展的战略问题。国家能源领导小组办公室将特高压电网建设列为能源工作的要点。变压器电压等级的提高使得对变压器绝缘的要求越来越高，目前变压器的内绝缘由于制造工艺及绝缘性能等原因仍采用油纸绝缘作为主要形式。随着变压器容量的增加，对变压器散热性能的要求也大大提高，提高散热效率的有效措施之一即为增加绝缘油流速，而绝缘油流速的增加将会给油纸复合绝缘带来许多影响，如：随流速增加油纸复合绝缘的油流带电强度将增加，可能引起局部放电腐蚀绝缘纸板，增加油中带电量减小油的耐电强度，从而对油纸绝缘造成破坏；但流速的增加可能破坏油中导电杂质小桥的形成，提高油纸复合绝缘中的薄弱环节——绝缘油的耐电强度，从而提高油纸复合绝缘整体绝缘性能，以及其他未知影响因素等等。可见，绝缘油流速的变化将对油纸复合绝缘的绝缘性能形成有益的或有害的影响，需加以重视，但以往对此方面研究甚少，缺乏系统研究的方法及设备。With the continuous growth of the national economy and the increasing demand for energy, high-voltage long-distance power transmission has become a strategic issue affecting economic development. The National Energy Leading Group Office listed UHV power grid construction as a key point of energy work. The improvement of transformer voltage level makes the requirements for transformer insulation higher and higher. At present, oil-paper insulation is still used as the main form of internal insulation of transformers due to manufacturing process and insulation performance. With the increase of transformer capacity, the requirements for transformer heat dissipation performance are also greatly improved. One of the effective measures to improve heat dissipation efficiency is to increase the flow rate of insulating oil, and the increase of flow rate of insulating oil will bring many effects to oil-paper composite insulation, such as : With the increase of the flow rate, the charge strength of the oil flow of the oil-paper composite insulation will increase, which may cause partial discharge to corrode the insulating cardboard, increase the electric charge in the oil and reduce the electric strength of the oil, thereby causing damage to the oil-paper insulation; but the increase of the flow rate may damage the oil. The formation of small bridges of conductive impurities in the medium can improve the weak link in the oil-paper composite insulation - the dielectric strength of the insulating oil, thereby improving the overall insulation performance of the oil-paper composite insulation, as well as other unknown influencing factors. It can be seen that the change of the flow rate of insulating oil will have a beneficial or harmful effect on the insulation performance of oil-paper composite insulation, which needs to be paid attention to. However, there has been little research on this aspect in the past, and there is a lack of systematic research methods and equipment.
现有耐电强度检验装置由于加工误差致安装困难，且时常有闪络发生。The existing electric strength testing device is difficult to install due to processing errors, and flashovers often occur.
发明内容Contents of the invention
本实用新型目的是为了解决现有耐电强度检验装置由于加工误差致安装困难，且时常有闪络发生的问题，提供了一种变压器油纸绝缘油流下击穿特性试验装置。The purpose of the utility model is to solve the problem that the existing electric strength test device is difficult to install due to processing errors, and flashovers often occur, and provides a test device for the breakdown characteristics of transformer oil paper insulating oil flowing down.
本实用新型所述变压器油纸绝缘油流下击穿特性试验装置，它包括高压套管、高压套管下连接件、上电极连接件、上电极、上电极绝缘件、下电极绝缘件、绝缘螺杆、绝缘螺帽、下电极、绝缘纸板、油道、接地螺栓、进油口、出油口、进油口连接件和出油口连接件，The transformer oil paper insulating oil flow down breakdown characteristic test device of the utility model includes a high voltage bushing, a lower connector of the high voltage bushing, an upper electrode connector, an upper electrode, an upper electrode insulating part, a lower electrode insulating part, an insulating screw, Insulating nut, lower electrode, insulating cardboard, oil channel, grounding bolt, oil inlet, oil outlet, oil inlet connector and oil outlet connector,
高压套管下连接件、上电极连接件、上电极、上电极绝缘件、下电极绝缘件、绝缘螺杆、绝缘螺帽、下电极、绝缘纸板、油道和接地螺栓设置在高压试验箱体内，The lower connector of the high-voltage bushing, the upper electrode connector, the upper electrode, the upper electrode insulator, the lower electrode insulator, the insulating screw, the insulating nut, the lower electrode, the insulating cardboard, the oil passage and the grounding bolt are arranged in the high-voltage test box,
上电极设置在下电极的正上方，The upper electrode is arranged directly above the lower electrode,
上电极嵌入上电极绝缘件内部，下电极嵌入下电极绝缘件内部，上电极绝缘件设置在下电极绝缘件上方，绝缘纸板由上电极绝缘件与下电极绝缘件夹紧固定，上电极绝缘件由绝缘螺杆和绝缘螺帽配合固定在和下电极绝缘件上，下电极绝缘件通过进油口连接件和出油口连接件配合固定在高压试验箱体上，上电极绝缘件和下电极绝缘件之间的空腔形成油道，进油口和出油口连通高压试验箱体外部和油道，The upper electrode is embedded in the upper electrode insulator, the lower electrode is embedded in the lower electrode insulator, the upper electrode insulator is arranged above the lower electrode insulator, the insulating cardboard is clamped and fixed by the upper electrode insulator and the lower electrode insulator, and the upper electrode insulator is made of The insulating screw and the insulating nut are fixed on the lower electrode insulator, the lower electrode insulator is fixed on the high voltage test box through the oil inlet connector and the oil outlet connector, the upper electrode insulator and the lower electrode insulator The cavity between them forms an oil passage, and the oil inlet and outlet are connected to the outside of the high-pressure test box and the oil passage.
上电极连接件的下端与上电极螺纹连接，上电极连接件的上端伸到高压套管下连接件中，The lower end of the upper electrode connector is threadedly connected to the upper electrode, and the upper end of the upper electrode connector extends into the lower connector of the high-voltage bushing.
高压导电芯通过高压套管引入高压试验箱体内，高压套管中的高压导电芯下端伸到高压套管下连接件中，并与高压套管下连接件螺纹连接，高压套管中的高压导电芯与上电极电气连接，The high-voltage conductive core is introduced into the high-voltage test chamber through the high-voltage bushing. The lower end of the high-voltage conductive core in the high-voltage bushing extends into the lower connector of the high-voltage bushing and is threaded with the lower connector of the high-voltage bushing. The high-voltage conductive core in the high-voltage bushing The core is electrically connected to the upper electrode,
所述下电极固定连接到接地螺栓。The lower electrode is fixedly connected to a ground bolt.
本实用新型的优点：本实用新型通过上、下电极绝缘件固定上、下电极与绝缘纸板之间的相对位置，并形成油道，提供了一种可对油纸复合绝缘进行不同流速下耐电强度检验的装置。在将高压电源引入上电极过程中采用动配合接触方式来防止加工误差积累造成的安装困难，在电极支撑绝缘件内表面上加工出多道凹槽，以提高闪络电压，防止闪络发生。Advantages of the utility model: the utility model fixes the relative position between the upper and lower electrodes and the insulating cardboard through the upper and lower electrode insulators, and forms an oil passage, and provides a kind of electric resistance under different flow rates for oil-paper composite insulation. Device for strength testing. In the process of introducing the high-voltage power supply to the upper electrode, the moving-fit contact method is adopted to prevent installation difficulties caused by the accumulation of machining errors, and multiple grooves are processed on the inner surface of the electrode support insulation to increase the flashover voltage and prevent flashover from occurring.
附图说明Description of drawings
图1是本实用新型所述变压器油纸绝缘油流下击穿特性试验装置的结构示意图。Fig. 1 is a structural schematic diagram of the test device for the breakdown characteristic of transformer oil paper insulating oil flowing down according to the utility model.
具体实施方式Detailed ways
具体实施方式一：下面结合图1说明本实施方式，本实施方式所述变压器油纸绝缘油流下击穿特性试验装置，它包括高压套管1、高压套管下连接件2、上电极连接件3、上电极4、上电极绝缘件5、下电极绝缘件6、绝缘螺杆7、绝缘螺帽8、下电极9、绝缘纸板10、油道11、接地螺栓12、进油口13、出油口14、进油口连接件15和出油口连接件16，Specific Embodiment 1: The present embodiment will be described below with reference to FIG. 1. The transformer oil paper insulating oil flow down breakdown characteristic test device in this embodiment includes a high-voltage bushing 1, a
高压套管下连接件2、上电极连接件3、上电极4、上电极绝缘件5、下电极绝缘件6、绝缘螺杆7、绝缘螺帽8、下电极9、绝缘纸板10、油道11和接地螺栓12设置在高压试验箱体内，High-voltage bushing
上电极4设置在下电极9的正上方，The upper electrode 4 is arranged directly above the lower electrode 9,
上电极4嵌入上电极绝缘件5内部，下电极9嵌入下电极绝缘件6内部，上电极绝缘件5设置在下电极绝缘件6上方，绝缘纸板10由上电极绝缘件5与下电极绝缘件6夹紧固定，上电极绝缘件5由绝缘螺杆7和绝缘螺帽8配合固定在和下电极绝缘件6上，下电极绝缘件6通过进油口连接件15和出油口连接件16配合固定在高压试验箱体上，上电极绝缘件5和下电极绝缘件6之间的空腔形成油道11，进油口13和出油口14连通高压试验箱体外部和油道11，The upper electrode 4 is embedded in the upper electrode insulating member 5, the lower electrode 9 is embedded in the lower
上电极连接件3的下端与上电极4螺纹连接，上电极连接件3的上端伸到高压套管下连接件2中，The lower end of the upper electrode connector 3 is screwed to the upper electrode 4, and the upper end of the upper electrode connector 3 extends into the
高压导电芯通过高压套管1引入高压试验箱体内，高压套管1中的高压导电芯下端伸到高压套管下连接件2中，并与高压套管下连接件2螺纹连接，高压套管1中的高压导电芯与上电极4电气连接，The high-voltage conductive core is introduced into the high-voltage test chamber through the high-voltage bushing 1, and the lower end of the high-voltage conductive core in the high-voltage bushing 1 extends into the
所述下电极9固定连接到接地螺栓12，接地螺栓12与地线相连。The lower electrode 9 is fixedly connected to a
当绝缘油从进油口13流入上电极绝缘件5与下电极绝缘件6形成的油道11时，与绝缘纸板10一起构成油流下油纸复合绝缘结构，当在上电极4与下电极9间施加高电压后，将在两电极间形成电场，逐渐升高电压以测试不同流速下油纸绝缘的击穿特性。When the insulating oil flows into the
具体实施方式二：本实施方式对实施方式一作进一步说明，上电极连接件3和高压套管下连接件2之间采用动配合方式连接。防止由于加工误差积累造成的连接困难，从而将高电位引入上电极。Embodiment 2: In this embodiment, Embodiment 1 is further described. The connection between the upper electrode connector 3 and the
具体实施方式三：本实施方式对实施方式一作进一步说明，上电极绝缘件5和下电极绝缘件6相对的内表面上铣有多道凹槽。以提高闪络电压，防止闪络发生。Embodiment 3: This embodiment further describes Embodiment 1. The inner surfaces of the upper electrode insulator 5 and the
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605057A (en) * | 2013-11-21 | 2014-02-26 | 国家电网公司 | Oil paper insulation breakdown intensity test apparatus and method |
| CN104749499A (en) * | 2015-02-09 | 2015-07-01 | 广东电网有限责任公司电力科学研究院 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
| CN104133101B (en) * | 2014-07-14 | 2017-01-04 | 西南交通大学 | A kind of test the experimental provision of transformator oil body electric current under different oil Flow Velocity |
| CN106680544A (en) * | 2016-12-22 | 2017-05-17 | 中国西电电气股份有限公司 | Clamping device for accelerated aging test of lightning arrester |
| CN110208669A (en) * | 2019-06-26 | 2019-09-06 | 国网浙江省电力有限公司电力科学研究院 | The device and method of insulation degradation between simulation oil immersed type capacitor panel of current transformer |
-
2012
- 2012-12-05 CN CN 201220663065 patent/CN202903958U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605057A (en) * | 2013-11-21 | 2014-02-26 | 国家电网公司 | Oil paper insulation breakdown intensity test apparatus and method |
| CN103605057B (en) * | 2013-11-21 | 2016-01-13 | 国家电网公司 | A kind of paper oil insulation disruptive strength experimental provision and method |
| CN104133101B (en) * | 2014-07-14 | 2017-01-04 | 西南交通大学 | A kind of test the experimental provision of transformator oil body electric current under different oil Flow Velocity |
| CN104749499A (en) * | 2015-02-09 | 2015-07-01 | 广东电网有限责任公司电力科学研究院 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
| CN106680544A (en) * | 2016-12-22 | 2017-05-17 | 中国西电电气股份有限公司 | Clamping device for accelerated aging test of lightning arrester |
| CN106680544B (en) * | 2016-12-22 | 2019-01-25 | 中国西电电气股份有限公司 | Clamping device for accelerated aging test of arrester |
| CN110208669A (en) * | 2019-06-26 | 2019-09-06 | 国网浙江省电力有限公司电力科学研究院 | The device and method of insulation degradation between simulation oil immersed type capacitor panel of current transformer |
| CN110208669B (en) * | 2019-06-26 | 2024-05-10 | 国网浙江省电力有限公司电力科学研究院 | Device and method for simulating insulation degradation between capacitive screens of oil-immersed current transformer |
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