CN104062526A - Oil-oil bushing cable outlet transformer test method without head removing - Google Patents
Oil-oil bushing cable outlet transformer test method without head removing Download PDFInfo
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Abstract
本发明涉及一种油油套管电缆出线变压器不拆头试验方法，其技术特点是：高压侧直流电阻试验方法：合上接地开关，打开接地连片，在接地开关处进行高压侧直流电阻测试；高压侧对低压侧的绝缘电阻、吸收比和极化指数试验方法：利用兆欧表从变压器高压中性点套管处进行测试；高压侧对低压侧的介质损耗和电容量试验方法：从变压器高压中性点套管处施加交流高压进行测试；高压侧各套管的介质损耗和电容量试验方法：利用高压介损仪采用正接法，从变压器高压中性点套管处施加交流高压，分别从各相套管末屏抽取信号进行测试。本发明不但大幅度降低了设备停电时间，提高了试验效率，而且确保了变压器及电网的安全、稳定运行，保证了电网运行可靠性。
The invention relates to a test method for oil-oil bushing cable outlet transformer without removing the head, and its technical characteristics are: high-voltage side DC resistance test method: close the grounding switch, open the grounding connection piece, and conduct the high-voltage side DC resistance test at the grounding switch ;The test method of insulation resistance, absorption ratio and polarization index from the high voltage side to the low voltage side: use a megohmmeter to test from the high voltage neutral point bushing of the transformer; the dielectric loss and capacitance test method from the high voltage side to the low voltage side: from Apply AC high voltage to the high-voltage neutral point bushing of the transformer for testing; the dielectric loss and capacitance test method of each bushing on the high-voltage side: use a high-voltage dielectric loss tester to apply positive connection method to apply AC high voltage from the high-voltage neutral point bushing of the transformer , respectively extract signals from the end screen of each phase casing for testing. The invention not only greatly reduces the power outage time of the equipment, improves the test efficiency, but also ensures the safe and stable operation of the transformer and the power grid, and ensures the reliability of the power grid operation.
Description
技术领域technical field
本发明属于变压器技术领域，尤其是一种油油套管电缆出线变压器不拆头试验方法。The invention belongs to the technical field of transformers, in particular to a test method for an oil-oil bushing cable outlet transformer without removing the head.
背景技术Background technique
对于油油套管电缆出线变压器，在例行试验中，拆除和恢复变压器与XLPE电缆之间连接所需要的现场工艺非常复杂(如真空注油、防潮防尘土)，导致设备停电的时间较长，从而影响到供电可靠性指标，并且极大地增加了现场试验人员的工作量。另外，拆除与恢复电缆，可能会对XLPE交联电缆和变压器套管产生不利影响，如接触电阻的增大、电缆绝缘的损伤等，反而更不利于设备的安全运行。For oil-and-oil bushing cable outlet transformers, in routine tests, the on-site processes required to remove and restore the connection between the transformer and the XLPE cable are very complicated (such as vacuum oil filling, moisture and dust protection), resulting in longer power outages for equipment , thus affecting the power supply reliability index and greatly increasing the workload of field test personnel. In addition, removing and restoring cables may have adverse effects on XLPE XLPE cables and transformer bushings, such as increase in contact resistance, damage to cable insulation, etc., which is even more detrimental to the safe operation of equipment.
发明内容Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种油油套管电缆出线变压器不拆头试验方法，解决了油油套管电缆出线的变压器拆头不方便导致某些常规试验无法正常进行的问题。The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a test method without dismantling the head of the oil-oil bushing cable outlet transformer, which solves the problem that some conventional tests cannot be carried out normally due to the inconvenience of dismantling the transformer head of the oil-oil bushing cable outlet The problem.
本发明解决其技术问题是采取以下技术方案实现的：The present invention solves its technical problem and realizes by taking the following technical solutions:
一种油油套管电缆出线变压器不拆头试验方法，包括以下步骤：A test method for an oil-oil bushing cable outlet transformer without removing the head, comprising the following steps:
步骤1、高压侧直流电阻试验方法：断开高压侧母线上的隔离开关，合上接地开关，打开接地连片，在接地开关处利用直流电阻测试仪进行高压侧直流电阻测试；Step 1. Test method of DC resistance on the high voltage side: disconnect the isolating switch on the busbar on the high voltage side, close the grounding switch, open the grounding connection piece, and use a DC resistance tester at the grounding switch to test the DC resistance of the high voltage side;
步骤2、高压侧对低压侧的绝缘电阻、吸收比和极化指数试验方法：恢复接地连片，打开接地开关，低压侧短路接地，利用兆欧表从变压器高压中性点套管处进行测试；Step 2. Insulation resistance, absorption ratio and polarization index test method of high voltage side to low voltage side: restore the ground connection piece, turn on the ground switch, short-circuit the low voltage side to ground, and use a megohmmeter to test from the high voltage neutral point bushing of the transformer ;
步骤3、高压侧对低压侧的介质损耗和电容量试验方法：利用高压介损仪采用反接法，从变压器高压中性点套管处施加交流高压进行测试；Step 3. The dielectric loss and capacitance test method of the high-voltage side to the low-voltage side: use the high-voltage dielectric loss meter to use the reverse connection method, and apply AC high voltage from the high-voltage neutral point bushing of the transformer to test;
步骤4、高压侧各套管的介质损耗和电容量试验方法：利用高压介损仪采用正接法，从变压器高压中性点套管处施加交流高压，分别从各相套管末屏抽取信号进行测试。Step 4. The dielectric loss and capacitance test method of each bushing on the high-voltage side: use a high-voltage dielectric loss meter to adopt the positive connection method, apply AC high voltage from the high-voltage neutral point bushing of the transformer, and extract signals from the end screen of each phase bushing respectively carry out testing.
本发明的优点和积极效果是：Advantage and positive effect of the present invention are:
本发明采用从主变侧的GIS接地刀，通过打开接地连片进行线间直流电阻试验；从变压器高压中性点进行绕组绝缘电阻、吸收比和极化指数，绕组的介损和电容量以及套管的介损和电容量试验，实现了油油套管电缆出线变压器在不放油、不拆除导杆状态下进行例行试验项目。解决了油油套管电缆出线的变压器拆头不方便导致某些常规试验无法正常进行的问题，不但大幅度降低了设备停电时间，提高了试验效率，而且确保了变压器及电网的安全、稳定运行，保证了电网运行可靠性。The present invention adopts the GIS grounding knife from the main transformer side, and conducts the inter-line DC resistance test by opening the ground connection piece; conducts the winding insulation resistance, absorption ratio and polarization index, dielectric loss and capacitance of the winding from the high voltage neutral point of the transformer, and The dielectric loss and capacitance test of the bushing has realized the routine test items of the oil-oil bushing cable outlet transformer without draining oil and without removing the guide rod. It solves the problem that some routine tests cannot be carried out normally due to the inconvenient dismantling of the transformer where the oil-oil bushing cable goes out, not only greatly reduces the power outage time of the equipment, improves the test efficiency, but also ensures the safe and stable operation of the transformer and the power grid , to ensure the reliability of power grid operation.
附图说明Description of drawings
图1是本发明的试验方法原理图。Fig. 1 is a schematic diagram of the test method of the present invention.
具体实施方式Detailed ways
以下结合附图对本发明做进一步详述：Below in conjunction with accompanying drawing, the present invention is described in further detail:
一种油油套管电缆出线变压器不拆头试验方法，如图1所示，包括以下步骤：A test method for an oil-oil bushing cable outlet transformer without removing the head, as shown in Figure 1, comprising the following steps:
步骤1、进行高压侧直流电阻试验：断开高压侧母线上的隔离开关，合上接地开关，打开接地连片，在接地开关处(测试点1)利用直流电阻测试仪进行高压侧直流电阻测试。Step 1. Perform the DC resistance test on the high voltage side: disconnect the isolating switch on the high voltage side busbar, close the grounding switch, open the grounding connection piece, and use a DC resistance tester at the grounding switch (test point 1) to conduct a DC resistance test on the high voltage side .
在本实施例中，以三相双绕组变压器为例，其中变压器高压侧采用油油套管电缆出线型式。In this embodiment, a three-phase double-winding transformer is taken as an example, wherein the high-voltage side of the transformer adopts an oil-and-oil bushing cable outlet type.
步骤2、进行高压侧对低压侧的绝缘电阻、吸收比和极化指数试验：恢复接地连片，打开接地开关，低压侧短路接地，利用兆欧表从变压器高压中性点套管处(测试点2)进行测试。Step 2. Carry out the insulation resistance, absorption ratio and polarization index test of the high-voltage side to the low-voltage side: restore the grounding connection piece, turn on the grounding switch, short-circuit the low-voltage side to ground, and use a megohmmeter to test the voltage from the high-voltage neutral point bushing of the transformer (test Point 2) to test.
步骤3、进行高压侧对低压侧的介质损耗和电容量试验：利用高压介损仪采用反接法，从变压器高压中性点套管处(测试点2)施加交流高压进行测试。Step 3. Conduct the dielectric loss and capacitance test of the high-voltage side to the low-voltage side: use a high-voltage dielectric loss meter and use the reverse connection method to apply AC high voltage from the high-voltage neutral point bushing of the transformer (test point 2) for testing.
步骤4、进行高压侧各套管的介质损耗和电容量试验：利用高压介损仪采用正接法，从变压器高压中性点套管处(测试点2)施加交流高压，分别从各相套管末屏抽取信号进行测试。Step 4. Carry out the dielectric loss and capacitance test of each bushing on the high-voltage side: use a high-voltage dielectric loss tester and adopt the positive connection method to apply AC high voltage from the bushing at the high-voltage neutral point of the transformer (test point 2), and respectively from each phase bushing The end-of-tube screen extracts the signal for testing.
需要强调的是，本发明所述的实施例是说明性的，而不是限定性的，因此本发明包括并不限于具体实施方式中所述的实施例，凡是由本领域技术人员根据本发明的技术方案得出的其他实施方式，同样属于本发明保护的范围。It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, so the present invention includes and is not limited to the embodiments described in the specific implementation, and those skilled in the art according to the technology of the present invention Other implementations derived from the scheme also belong to the protection scope of the present invention.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977489A (en) * | 2015-07-05 | 2015-10-14 | 巢湖市金辉自控设备有限公司 | Detection and maintenance method for windings of transformer |
| CN106707125A (en) * | 2017-01-04 | 2017-05-24 | 保定天威集团特变电气有限公司 | Partial discharge experimental method for oil and gas bushing product |
| CN106990297A (en) * | 2017-06-01 | 2017-07-28 | 贵州乌江水电开发有限责任公司构皮滩发电厂 | A kind of measurement 500kV main transformer bushing dielectric dissipation factor tan δ method |
| CN107462788A (en) * | 2017-07-17 | 2017-12-12 | 广西电网有限责任公司电力科学研究院 | A kind of method of testing of 500kV auto-transformers D.C. resistance |
| CN107727989A (en) * | 2017-10-10 | 2018-02-23 | 大唐国际发电股份有限公司北京高井热电厂 | The test method of oil-gas casing structure transformer |
| CN110045188A (en) * | 2019-03-27 | 2019-07-23 | 广东电网有限责任公司 | A kind of system and method for not removing high-side lead measuring transformer insulation resistance |
| CN110108943A (en) * | 2019-06-03 | 2019-08-09 | 国网青海省电力公司检修公司 | Drainage thread measuring transformer dielectric loss, the method for capacitance and insulation resistance are not disassembled |
| CN110632453A (en) * | 2019-09-04 | 2019-12-31 | 国网辽宁省电力有限公司电力科学研究院 | Test transformers and combined electrical appliances, cable composite connection equipment and its test methods |
| WO2020037488A1 (en) * | 2018-08-21 | 2020-02-27 | 华为海洋网络有限公司 | Cable assist device, and submarine cable assist system |
| CN111337750A (en) * | 2020-02-11 | 2020-06-26 | 深圳供电局有限公司 | Method and device for synchronously testing direct resistance of three-phase winding of cable outgoing type transformer |
| CN111707887A (en) * | 2020-05-22 | 2020-09-25 | 国网河北省电力有限公司保定供电分公司 | An Optimal Scheme for Routine Test of Power Transformer |
| CN112731210A (en) * | 2020-12-09 | 2021-04-30 | 江苏核电有限公司 | An electrical preventive test method for main transformer without dismantling high-voltage side GIS |
| CN114002529A (en) * | 2021-10-29 | 2022-02-01 | 保定天威集团特变电气有限公司 | SF6 oil-gas casing transformer frequency response curve test method |
| CN114839486A (en) * | 2022-04-27 | 2022-08-02 | 包头钢铁（集团）有限责任公司 | Insulation preventive low-voltage test device, high-voltage test device and method for plug-in transformer |
| WO2023088877A1 (en) * | 2021-11-16 | 2023-05-25 | Omicron Electronics Gmbh | Test system and method for determining a capacity of a high-voltage device |
| CN118920336A (en) * | 2024-08-05 | 2024-11-08 | 国网湖南省电力有限公司 | Small oil discharge replacement method for neutral point sleeve for converter transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368995A (en) * | 2008-08-29 | 2009-02-18 | 齐齐哈尔电业局 | Test method for GIS combined electrical appliances and plug-in transformers without removing the head |
| CN203164353U (en) * | 2013-03-27 | 2013-08-28 | 国家电网公司 | Head dismantling-free transformer medium spectrum testing structure |
-
2014
- 2014-06-30 CN CN201410305442.7A patent/CN104062526A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368995A (en) * | 2008-08-29 | 2009-02-18 | 齐齐哈尔电业局 | Test method for GIS combined electrical appliances and plug-in transformers without removing the head |
| CN203164353U (en) * | 2013-03-27 | 2013-08-28 | 国家电网公司 | Head dismantling-free transformer medium spectrum testing structure |
Non-Patent Citations (1)
| Title |
|---|
| 刑继宏 等: "琅琊山电厂封闭式电缆连接的220kV变压器不拆头预防性试验研究与实施", 《华东电力》 * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977489A (en) * | 2015-07-05 | 2015-10-14 | 巢湖市金辉自控设备有限公司 | Detection and maintenance method for windings of transformer |
| CN106707125A (en) * | 2017-01-04 | 2017-05-24 | 保定天威集团特变电气有限公司 | Partial discharge experimental method for oil and gas bushing product |
| CN106990297A (en) * | 2017-06-01 | 2017-07-28 | 贵州乌江水电开发有限责任公司构皮滩发电厂 | A kind of measurement 500kV main transformer bushing dielectric dissipation factor tan δ method |
| CN107462788A (en) * | 2017-07-17 | 2017-12-12 | 广西电网有限责任公司电力科学研究院 | A kind of method of testing of 500kV auto-transformers D.C. resistance |
| CN107727989A (en) * | 2017-10-10 | 2018-02-23 | 大唐国际发电股份有限公司北京高井热电厂 | The test method of oil-gas casing structure transformer |
| WO2020037488A1 (en) * | 2018-08-21 | 2020-02-27 | 华为海洋网络有限公司 | Cable assist device, and submarine cable assist system |
| CN111095704A (en) * | 2018-08-21 | 2020-05-01 | 华为海洋网络有限公司 | A kind of cable auxiliary equipment and submarine cable auxiliary system |
| CN110045188B (en) * | 2019-03-27 | 2021-03-02 | 广东电网有限责任公司 | A system and method for measuring transformer insulation resistance without removing high-voltage side leads |
| CN110045188A (en) * | 2019-03-27 | 2019-07-23 | 广东电网有限责任公司 | A kind of system and method for not removing high-side lead measuring transformer insulation resistance |
| CN110108943A (en) * | 2019-06-03 | 2019-08-09 | 国网青海省电力公司检修公司 | Drainage thread measuring transformer dielectric loss, the method for capacitance and insulation resistance are not disassembled |
| CN110632453A (en) * | 2019-09-04 | 2019-12-31 | 国网辽宁省电力有限公司电力科学研究院 | Test transformers and combined electrical appliances, cable composite connection equipment and its test methods |
| CN111337750A (en) * | 2020-02-11 | 2020-06-26 | 深圳供电局有限公司 | Method and device for synchronously testing direct resistance of three-phase winding of cable outgoing type transformer |
| CN111337750B (en) * | 2020-02-11 | 2021-12-21 | 深圳供电局有限公司 | Method and device for synchronous test of three-phase winding direct resistance of cable outlet type transformer |
| CN111707887A (en) * | 2020-05-22 | 2020-09-25 | 国网河北省电力有限公司保定供电分公司 | An Optimal Scheme for Routine Test of Power Transformer |
| CN112731210A (en) * | 2020-12-09 | 2021-04-30 | 江苏核电有限公司 | An electrical preventive test method for main transformer without dismantling high-voltage side GIS |
| CN114002529A (en) * | 2021-10-29 | 2022-02-01 | 保定天威集团特变电气有限公司 | SF6 oil-gas casing transformer frequency response curve test method |
| WO2023088877A1 (en) * | 2021-11-16 | 2023-05-25 | Omicron Electronics Gmbh | Test system and method for determining a capacity of a high-voltage device |
| CN114839486A (en) * | 2022-04-27 | 2022-08-02 | 包头钢铁（集团）有限责任公司 | Insulation preventive low-voltage test device, high-voltage test device and method for plug-in transformer |
| CN118920336A (en) * | 2024-08-05 | 2024-11-08 | 国网湖南省电力有限公司 | Small oil discharge replacement method for neutral point sleeve for converter transformer |
| CN118920336B (en) * | 2024-08-05 | 2025-09-19 | 国网湖南省电力有限公司 | Small oil discharge replacement method for neutral point sleeve for converter transformer |
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Application publication date: 20140924 |