CN105572550A - Insulating test piece and test electrode device using same - Google Patents
Insulating test piece and test electrode device using same Download PDFInfo
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- CN105572550A CN105572550A CN201510951666.XA CN201510951666A CN105572550A CN 105572550 A CN105572550 A CN 105572550A CN 201510951666 A CN201510951666 A CN 201510951666A CN 105572550 A CN105572550 A CN 105572550A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/20—Preparation of articles or specimens to facilitate testing
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Abstract
本发明涉及一种绝缘试件及使用该绝缘试件的试验电极装置，绝缘试件，包括由待测绝缘材料制成的基体(1)，基体一侧设有一个用于吻合容纳高压试验电极(3)的第一容纳槽(5)，与第一容纳槽相背的基体另一侧设有用于吻合容纳低压试验电极(4)的第二容纳槽(6)，第一容纳槽与第二容纳槽之间为有与基体一体成型的槽间绝缘部分(2)。同传统绝缘材料电气强度试验方法相比，本发明降低了材料表面的局部放电，测试结果更加准确，而且本发明试验环境与电力设备实际运行环境一致，使得测试结果更具有实际指导意义。
The invention relates to an insulating test piece and a test electrode device using the insulating test piece. The insulating test piece includes a base (1) made of an insulating material to be tested, and one side of the base is provided for matching and accommodating a high-voltage test electrode (3) The first accommodation groove (5), the other side of the substrate opposite to the first accommodation groove is provided with a second accommodation groove (6) for matching and accommodating the low-voltage test electrode (4), the first accommodation groove and the second accommodation groove Between the two receiving grooves is an insulating part (2) between the grooves integrally formed with the base body. Compared with the traditional electric strength test method of insulating materials, the present invention reduces the partial discharge on the surface of the material, and the test results are more accurate, and the test environment of the present invention is consistent with the actual operating environment of electric equipment, so that the test results have more practical guiding significance.
Description
技术领域technical field
本发明涉及一种绝缘试件及使用该绝缘试件的试验电极装置。The invention relates to an insulating test piece and a test electrode device using the insulating test piece.
背景技术Background technique
高压电气设备的绝缘性能直接决定着电力系统能否可靠运行，为有效保证高压电气产品具有优良的绝缘性能，必须对绝缘材料的工频(48Hz～62Hz)短时电气强度与1.2/50μs脉冲电压应力下电气强度进行测试。The insulation performance of high-voltage electrical equipment directly determines whether the power system can operate reliably. In order to effectively ensure the excellent insulation performance of high-voltage electrical products, the power frequency (48Hz～62Hz) short-term electric strength and 1.2/50μs pulse voltage of the insulating material must be checked. Electrical strength under stress is tested.
绝缘材料电气强度测量方法主要依据GB1408《绝缘材料电气强度试验方法》。为防止闪络，电气强度试验在变压器油中进行，浇注绝缘试条的厚度要求1.0±0.1mm，采用不等径电极进行测量，电极由两个金属圆柱体组成，其边缘倒圆成半径为3.0±0.2mm的圆弧，其中一个电极的直径为25±1mm，高约25mm，另一个电极直径为75±1mm，高约15mm，两个电极同轴放置，误差在2mm内。此种测量方法存在以下问题，两侧电极与测试材料的非接触部位存在一定局部放电，材料电气强度测量值存在偏差，另一方面，试验在液体绝缘介质中开展，与电力设备实际运行环境不同，获得的测试数据不能有效代表实际运行条件下绝缘制品的电气性能。The method of measuring the electric strength of insulating materials is mainly based on GB1408 "Test Method for Electric Strength of Insulating Materials". In order to prevent flashover, the electric strength test is carried out in transformer oil. The thickness of the pouring insulating test strip is required to be 1.0±0.1mm, and the measurement is carried out by electrodes with unequal diameters. The electrodes are composed of two metal cylinders, whose edges are rounded to a radius of 3.0 For an arc of ±0.2mm, one electrode has a diameter of 25±1mm and a height of about 25mm, and the other electrode has a diameter of 75±1mm and a height of about 15mm. The two electrodes are placed coaxially, and the error is within 2mm. This measurement method has the following problems. There is a certain partial discharge between the electrodes on both sides and the non-contact part of the test material, and there is a deviation in the measured value of the electric strength of the material. On the other hand, the test is carried out in a liquid insulating medium, which is different from the actual operating environment of the power equipment. , the obtained test data cannot effectively represent the electrical performance of insulation products under actual operating conditions.
发明内容Contents of the invention
本发明的目的是提供一种绝缘试件，用以解决现有绝缘试件在绝缘试验时产生的局部放电的问题。The object of the present invention is to provide an insulation test piece, which is used to solve the problem of partial discharge generated during the insulation test of the existing insulation test piece.
为实现上述目的，本发明的方案包括：To achieve the above object, the solution of the present invention includes:
一种绝缘试件，包括由待测绝缘材料制成的基体(1)，其特征在于，所述基体一侧设有一个用于吻合容纳高压试验电极(3)的第一容纳槽(5)，与第一容纳槽相背的基体另一侧设有用于吻合容纳低压试验电极(4)的第二容纳槽(6)，第一容纳槽与第二容纳槽之间为有与基体一体成型的槽间绝缘部分(2)。An insulating test piece, comprising a substrate (1) made of an insulating material to be tested, characterized in that one side of the substrate is provided with a first accommodating groove (5) for accommodating a high-voltage test electrode (3) The other side of the substrate opposite to the first containing groove is provided with a second containing groove (6) for matching and containing the low-voltage test electrode (4). The slot insulation part (2).
所述基体(1)一体浇注成型。The base body (1) is integrally cast and molded.
第一容纳槽(5)、第二容纳槽(6)直径相等。The diameters of the first accommodation groove (5) and the second accommodation groove (6) are equal.
同时，本发明还提供了一种试验电极装置，包括：Simultaneously, the present invention also provides a kind of test electrode device, comprises:
用于连接放电装置的绝缘试件，绝缘试件包括由待测绝缘材料制成的基体(1)，所述基体一侧设有第一容纳槽(5)，与第一容纳槽相背的基体另一侧设有第二容纳槽(6)，第一容纳槽(5)吻合容纳高压试验电极(3)，第二容纳槽(6)吻合容纳低压试验电极；第一容纳槽与第二容纳槽之间为有与基体一体成型的槽间绝缘部分(2)。The insulating test piece used to connect the discharge device, the insulating test piece includes a base (1) made of the insulating material to be tested, a first accommodation groove (5) is provided on one side of the base body, and the first accommodation groove is opposite to the first accommodation groove. The other side of the substrate is provided with a second accommodation groove (6), the first accommodation groove (5) coincides to accommodate the high-voltage test electrode (3), and the second accommodation groove (6) coincides to accommodate the low-voltage test electrode; the first accommodation groove and the second There is an insulating part (2) between the grooves integrally formed with the base body between the receiving grooves.
所述基体(1)与高压试验电极(3)、低压试验电极(4)一体浇注成型。The base body (1), the high-voltage test electrode (3), and the low-voltage test electrode (4) are integrally cast and formed.
第一容纳槽(5)、第二容纳槽(6)直径相等；高压试验电极(3)、低压试验电极(4)直径相等。The diameters of the first accommodation groove (5) and the second accommodation groove (6) are equal; the diameters of the high-voltage test electrode (3) and the low-voltage test electrode (4) are equal.
所述试验电极装置还包括一个用于放置绝缘试件的壳体(9)，壳体中充有绝缘气体。The test electrode device also includes a shell (9) for placing an insulating test piece, and the shell is filled with insulating gas.
本发明的绝缘试件结构，将试验电极完全包裹起来，从而避免了现有的GB1408《绝缘材料电气强度试验方法》中测试装置本体结构造成的局放等问题，测得的数据更加准确。The insulation test piece structure of the present invention completely wraps the test electrodes, thereby avoiding partial discharge and other problems caused by the structure of the test device body in the existing GB1408 "Test Method for Electric Strength of Insulating Materials", and the measured data is more accurate.
进一步的，采用浇注的形式，使绝缘试件、高压电极、低压电极一体成型，保证了包覆的效果，消除局部放电的效果更好。Further, the insulating test piece, the high-voltage electrode, and the low-voltage electrode are integrally formed by casting, which ensures the effect of coating and has a better effect of eliminating partial discharge.
进一步的，将绝缘试件置于气体绝缘环境中进行测试，与电力设备实际运行环境一致，测试结果更具实际意义。Furthermore, the insulation test piece is placed in a gas-insulated environment for testing, which is consistent with the actual operating environment of the power equipment, and the test results are more practical.
附图说明Description of drawings
图1是试验电极装置实施例1的结构图；Fig. 1 is the structural diagram of test electrode device embodiment 1;
图2是试验电极装置实施例2的结构图。Fig. 2 is a structural view of Example 2 of the test electrode device.
具体实施方式detailed description
下面结合附图对本发明做进一步详细的说明。The present invention will be described in further detail below in conjunction with the accompanying drawings.
实施例1Example 1
如图1所示为一致试验电极装置，包括用于绝缘试件、高压试验电极3和低压试验电极4，绝缘试件包括由待测绝缘材料制成的基体1，基体一侧设有第一容纳槽5，与第一容纳槽相背的基体另一侧设有第二容纳槽6，第一容纳槽5吻合容纳高压试验电极3，第二容纳槽6吻合容纳低压试验电极4；第一容纳槽与第二容纳槽之间为有与基体一体成型的槽间绝缘部分2。As shown in Figure 1, it is a uniform test electrode device, including an insulating test piece, a high-voltage test electrode 3 and a low-voltage test electrode 4. The insulating test piece includes a substrate 1 made of insulating material to be tested, and a first electrode is provided on one side of the substrate. The accommodation groove 5 is provided with a second accommodation groove 6 on the other side of the substrate opposite to the first accommodation groove. The first accommodation groove 5 coincides to accommodate the high-voltage test electrode 3, and the second accommodation groove 6 coincides to accommodate the low-voltage test electrode 4; Between the accommodation groove and the second accommodation groove is an inter-slot insulation part 2 integrally formed with the base body.
通过将试验电极完全包裹起来，从而避免了现有的GB1408《绝缘材料电气强度试验方法》中测试装置本体结构造成的局放等问题，测得的数据更加准确。By completely wrapping the test electrode, problems such as partial discharge caused by the structure of the test device body in the existing GB1408 "Electric Strength Test Method for Insulating Materials" are avoided, and the measured data is more accurate.
为了能够进一步保证不产生局部放电，可以通过浇注的方式使绝缘材料包裹试验电极，使基体1与高压试验电极3、低压试验电极4一体浇注成型。In order to further ensure that no partial discharge occurs, the insulating material can be used to wrap the test electrodes by casting, so that the base 1 , the high-voltage test electrodes 3 and the low-voltage test electrodes 4 are integrally cast.
浇注过程为：The pouring process is:
1)导体电极部分清洗：将导体电极置于酸液中进行酸洗处理，保证导体电极表面清洁无污物。1) Partial cleaning of the conductor electrode: place the conductor electrode in an acid solution for pickling treatment to ensure that the surface of the conductor electrode is clean and free of dirt.
2)模具处理：将模具于125±5℃条件下加热3h进行预处理。2) Mold treatment: heat the mold at 125±5°C for 3 hours for pretreatment.
3)原料处理：将树脂于135±5℃下处理5h，确保树脂充分熔化，将树脂、填料、固化剂等原料按一定配比加入，搅拌脱气处理。3) Raw material treatment: Treat the resin at 135±5°C for 5 hours to ensure that the resin is fully melted, add resin, filler, curing agent and other raw materials according to a certain ratio, and stir for degassing treatment.
4)浇注：模具推入浇注炉，125±5℃条件下浇注5～10min。4) Pouring: The mold is pushed into the pouring furnace, and poured at 125±5°C for 5-10 minutes.
5)固化：105±5℃/15±0.5h，150±5℃/20±0.5h(中间不脱模)。5) Curing: 105±5℃/15±0.5h, 150±5℃/20±0.5h (no demoulding in the middle).
6)修整：去除浇口，修整试验电极表面。6) Trimming: remove the gate and trim the surface of the test electrode.
实施例2Example 2
与实施例1不同在于，试验电极装置还包括一个用于放置绝缘试件的壳体9，壳体中充有绝缘气体10。高压电极连接导电与支撑部件7，低压电极连接导电部件8。The difference from Embodiment 1 is that the test electrode device also includes a casing 9 for placing an insulating test piece, and an insulating gas 10 is filled in the casing. The high-voltage electrode is connected to the conductive and supporting component 7 , and the low-voltage electrode is connected to the conductive component 8 .
壳体(筒体)充入0.4MPaSF6气体绝缘介质，试验电极一端通过导电部件及支撑部件7接高压电，另一端通过导电部件8与筒体相连接，共同接地，形成测试回路。将绝缘试件置于气体绝缘环境中进行测试，与电力设备实际运行环境一致，测试结果更具实际意义。根据需要，也可以在真空、油中进行测试。The casing (cylinder) is filled with 0.4MPaSF6 gas insulating medium, one end of the test electrode is connected to high voltage through the conductive part and the supporting part 7, and the other end is connected to the cylinder through the conductive part 8, and they are grounded together to form a test circuit. The insulation test piece is placed in a gas-insulated environment for testing, which is consistent with the actual operating environment of the power equipment, and the test results are more practical. Tests can also be carried out in vacuum, in oil as required.
具体电气强度测试过程为：The specific electric strength test process is:
1)搭建试验装置：以断路器筒体为试验装置，借助其内部导电及支撑部件进行安装，将试验电极标号01、02、03、04、05，并依次固定在试验筒体内部。1) Set up the test device: take the circuit breaker cylinder as the test device, install it with the help of its internal conductive and supporting parts, and fix the test electrodes in the test cylinder in turn with the labels 01, 02, 03, 04, and 05.
2)测试前准备工序：将上述安装完毕的试验筒体进行密封处理，抽真空，并充入0.4MPaSF6气体作为绝缘介质。2) Preparation process before the test: seal the above-mentioned installed test cylinder, vacuumize it, and fill it with 0.4MPaSF6 gas as an insulating medium.
3)测试：0.4MPaSF6条件下，工频耐压30kV/mm1min，通过后进行工频耐压40kV/mm1min，该项测试通过后进行1.2/50μs雷电冲击±70kV/mm，各1次。经过测试，01、02、03、04号工频耐压30kV/mm1min通过，工频耐压40kV/mm1min未通过，05号工频耐压30kV/mm1min通过，工频耐压40kV/mm1min通过，雷电冲击±70kV/mm通过。3) Test: Under the condition of 0.4MPaSF6, the power frequency withstand voltage is 30kV/mm1min. After passing the test, the power frequency withstand voltage is 40kV/mm1min. After passing the test, perform 1.2/50μs lightning shock ±70kV/mm, once each. After testing, No. 01, 02, 03, and 04 passed the power frequency withstand voltage of 30kV/mm1min, and failed the power frequency withstand voltage of 40kV/mm1min. No. 05 passed the power frequency withstand voltage of 30kV/mm1min, and passed the power frequency withstand voltage of 40kV/mm1min. Lightning impulse ±70kV/mm passed.
以上是试验电极装置实施例，关于绝缘试件实施例，由于已经在以上进行了详细说明，故在此不再赘述。The above is the embodiment of the test electrode device, and the embodiment of the insulating test piece has been described in detail above, so it will not be repeated here.
以上给出了本发明涉及的具体实施方式，但本发明不局限于所描述的实施方式。在本发明给出的思路下，采用对本领域技术人员而言容易想到的方式对上述实施例中的技术手段进行变换、替换、修改，并且起到的作用与本发明中的相应技术手段基本相同、实现的发明目的也基本相同，这样形成的技术方案是对上述实施例进行微调形成的，这种技术方案仍落入本发明的保护范围内。The specific embodiments related to the present invention are given above, but the present invention is not limited to the described embodiments. Under the idea given by the present invention, the technical means in the above-mentioned embodiments are transformed, replaced, and modified in ways that are easy for those skilled in the art, and the functions played are basically the same as those of the corresponding technical means in the present invention. 1. The purpose of the invention realized is also basically the same, and the technical solution formed in this way is formed by fine-tuning the above-mentioned embodiments, and this technical solution still falls within the protection scope of the present invention.
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