CN103472374A - GIS Partial Discharge Online Monitoring Device - Google Patents
GIS Partial Discharge Online Monitoring Device Download PDFInfo
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- CN103472374A CN103472374A CN2013103805915A CN201310380591A CN103472374A CN 103472374 A CN103472374 A CN 103472374A CN 2013103805915 A CN2013103805915 A CN 2013103805915A CN 201310380591 A CN201310380591 A CN 201310380591A CN 103472374 A CN103472374 A CN 103472374A
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Abstract
Description
技术领域 technical field
本发明涉及的是一种GIS局部放电在线监测装置，属于变电站的设备安全监测技术领域。 The invention relates to a GIS partial discharge online monitoring device, which belongs to the technical field of substation equipment safety monitoring.
背景技术 Background technique
以SF6作为绝缘介质的气体绝缘金属封闭开关设备（GIS），也称全封闭式组合电器和气体绝缘变电站，将变电站中除变压器以外的电气设备，包括短路器、隔离开关、接地开关、电流互感器、电压互感器、母线和出线套管等全部封装在接地的金属外壳内，壳内充以0.3—0.4Mpa的SF6气体作为绝缘和灭弧介质。 Gas-insulated metal-enclosed switchgear (GIS) with SF6 as the insulating medium, also known as fully-enclosed combined electrical appliances and gas-insulated substations, uses electrical equipment other than transformers in substations, including short circuits, disconnectors, grounding switches, and current mutual inductance. The transformer, voltage transformer, busbar and outlet bushing are all packaged in a grounded metal shell, and the shell is filled with 0.3-0.4Mpa SF6 gas as the insulation and arc extinguishing medium.
GIS 的安全运行对整个电力系统的稳定至关重要，一旦发生故障，必将引 起所辖局部地区乃至全部地区停电。由于 GIS 是大型的封闭式组合结构系统，停电检修时除需要投入大量的人 力 物 力 外， 还需要较长的维修时间，这必将给国民经 济造成重大的损失；所以在 GIS 发生故障 之前，如果能够检测并判断其内部缺陷状 况，就显得尤为重要。 The safe operation of GIS is crucial to the stability of the entire power system. Once a fault occurs, it will inevitably cause a power outage in some areas or even the entire area under its jurisdiction. Since GIS is a large-scale closed combined structure system, in addition to a large amount of manpower and material resources, it also requires a long maintenance time during power outage maintenance, which will definitely cause major losses to the national economy; so when GIS fails Previously, it was particularly important to be able to detect and judge its internal defect status.
局部放电是 GIS 内部发生绝缘破坏的 先兆现象，通常发生原因为: 浇铸绝缘内 部存在空洞或杂质; 金属或绝缘表面有尖 端或突起; 由于安装不慎或开关分合产生 颗粒状或丝状的金属微粒，这些微粒可以 附在绝缘表面或落在外壳底部，在外壳底 部的金属微粒在电场作用下不断移动或不 规则的跳跃，当金属颗粒腾空时会带有电 荷，下落时则会产生局部放电; 金属屏蔽在触头间发生局部放电。 Partial discharge is a harbinger of insulation damage inside the GIS, usually due to: there are voids or impurities inside the cast insulation; there are sharp points or protrusions on the surface of the metal or insulation; granular or filamentary particles are generated due to careless installation or switch opening and closing These particles can be attached to the insulating surface or fall on the bottom of the shell. The metal particles at the bottom of the shell are constantly moving or jumping irregularly under the action of the electric field. When the metal particles fly into the air, they will be charged, and when they fall, they will Partial discharges are generated; metal shields generate partial discharges between the contacts.
局部放电对于 GIS 设备而言是一个非常危险 的信号，一旦出现轻微的局部放电，如不及时排 除，必将导致严重的绝缘破坏，造成严重的后果。 Partial discharge is a very dangerous signal for GIS equipment. Once a slight partial discharge occurs, if it is not eliminated in time, it will definitely lead to serious insulation damage and serious consequences.
发明内容 Contents of the invention
本发明的目的在于克服现有技术存在的不足，而提供一种结构简单，使用方便可靠，抗干扰性能好、灵敏度高的GIS局部放电在线监测装置。 The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a GIS partial discharge on-line monitoring device with simple structure, convenient and reliable use, good anti-interference performance and high sensitivity.
本发明的目的是通过如下技术方案来完成的，所述的一种GIS局部放电在线监测装置，它至少包括一GIS外壳以及在该GIS外壳上的导电杆，并在所述GIS外壳上设置有盆式绝缘子，所述的盆式绝缘子内靠近接地端预先埋设有一个电极，在所述电极与GIS外壳之间接出一个检测阻抗，该检测阻抗通过连接一高通滤波及放大器后，再通过一整形电路连接一可检测GIS局部放电信号的监测器。 The object of the present invention is to be accomplished through the following technical scheme, described a kind of GIS partial discharge on-line monitoring device, it at least comprises a GIS casing and the conductive rod on this GIS casing, and is provided with Basin type insulator, said pot type insulator is pre-embedded with an electrode close to the grounding terminal, and a detection impedance is connected between the electrode and the GIS shell, the detection impedance is connected to a high-pass filter and amplifier, and then passed through a The circuit is connected with a monitor capable of detecting the partial discharge signal of the GIS.
本发明是对GIS设备进行有效的局部放电进行在 线 监测，可以实现故障预警，事先排除故障隐患，有效确保供电可靠性并且节省大量的人力物力；具有结构简单，使用方便可靠，抗干扰性能好、灵敏度高。 The present invention carries out effective partial discharge on-line monitoring of GIS equipment, which can realize fault early warning, eliminate hidden faults in advance, effectively ensure power supply reliability and save a lot of manpower and material resources; it has simple structure, convenient and reliable use, and good anti-interference performance ,high sensitivity.
附图说明 Description of drawings
图1是本发明的结构原理示意图。 Fig. 1 is a schematic diagram of the structure principle of the present invention.
具体实施方式 Detailed ways
下面将结合附图对本发明作详细的介绍：图1所示，本发明所述的一种GIS局部放电在线监测装置，它至少包括一GIS外壳1以及在该GIS外壳上的导电杆2，并在所述GIS外壳1上设置有盆式绝缘子3，所述的盆式绝缘子3内靠近接地端预先埋设有一个电极4，在所述电极4与GIS外壳1之间接出一个检测阻抗5，该检测阻抗5通过连接一高通滤波及放大器6后，再通过一整形电路7连接一可检测GIS局部放电信号的监测器8。
The present invention will be described in detail below in conjunction with accompanying drawing: As shown in Fig. 1, a kind of GIS partial discharge on-line monitoring device of the present invention, it at least comprises a GIS shell 1 and the
本发明是在GIS 外壳的盆式绝缘子上埋设一个电极，在该电极与外壳形成电容，以此电容传感器提取局部放电的脉冲信号，并通过信号放大和检测以获得GIS中局部放电信号，它的优点是抗干扰性能好、灵敏度高，可检测出 5 pC 的局部放电。 The present invention embeds an electrode on the pot insulator of the GIS shell, and forms a capacitor between the electrode and the shell, so that the capacitive sensor extracts the pulse signal of partial discharge, and obtains the partial discharge signal in GIS through signal amplification and detection. The advantages are good anti-interference performance, high sensitivity, and can detect partial discharge of 5 pC.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459492A (en) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | Partial discharge detection device and detection method for power cable voltage-withstand test |
| CN107356849A (en) * | 2017-08-25 | 2017-11-17 | 广州供电局有限公司 | Supporting insulator local discharge detection device and method in gas-insulated switch |
| CN110108988A (en) * | 2019-05-08 | 2019-08-09 | 国电南瑞科技股份有限公司 | A kind of substation's type insulation monitoring system and method based on EMTC |
| CN115267522A (en) * | 2022-08-03 | 2022-11-01 | 清华四川能源互联网研究院 | Partial discharge detection system, method and partial discharge detection and calibration method |
Citations (5)
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|---|---|---|---|---|
| EP0984289A1 (en) * | 1997-05-21 | 2000-03-08 | Hitachi, Ltd. | Partial discharge detector of gas-insulated apparatus |
| JP2008216145A (en) * | 2007-03-06 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Partial discharge detection method |
| JP2009020008A (en) * | 2007-07-12 | 2009-01-29 | Mitsubishi Electric Corp | Insulation monitoring equipment for gas insulation equipment |
| CN102305903A (en) * | 2011-06-03 | 2012-01-04 | 云南电力试验研究院(集团)有限公司 | Partial discharge detection method for pulse current of electrified operation single phase integrated gas insulated switchgear (GIS) |
| CN203502546U (en) * | 2013-08-28 | 2014-03-26 | 国家电网公司 | A GIS Partial Discharge Online Monitoring Device |
-
2013
- 2013-08-28 CN CN2013103805915A patent/CN103472374A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0984289A1 (en) * | 1997-05-21 | 2000-03-08 | Hitachi, Ltd. | Partial discharge detector of gas-insulated apparatus |
| JP2008216145A (en) * | 2007-03-06 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Partial discharge detection method |
| JP2009020008A (en) * | 2007-07-12 | 2009-01-29 | Mitsubishi Electric Corp | Insulation monitoring equipment for gas insulation equipment |
| CN102305903A (en) * | 2011-06-03 | 2012-01-04 | 云南电力试验研究院(集团)有限公司 | Partial discharge detection method for pulse current of electrified operation single phase integrated gas insulated switchgear (GIS) |
| CN203502546U (en) * | 2013-08-28 | 2014-03-26 | 国家电网公司 | A GIS Partial Discharge Online Monitoring Device |
Non-Patent Citations (1)
| Title |
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| 刘勋等: "GIS局部放电在线监测技术的综合分析", 《电气应用》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459492A (en) * | 2014-12-12 | 2015-03-25 | 国家电网公司 | Partial discharge detection device and detection method for power cable voltage-withstand test |
| CN107356849A (en) * | 2017-08-25 | 2017-11-17 | 广州供电局有限公司 | Supporting insulator local discharge detection device and method in gas-insulated switch |
| CN107356849B (en) * | 2017-08-25 | 2023-12-05 | 广东电网有限责任公司广州供电局 | Partial discharge detection device and method for support insulator in gas insulated switchgear |
| CN110108988A (en) * | 2019-05-08 | 2019-08-09 | 国电南瑞科技股份有限公司 | A kind of substation's type insulation monitoring system and method based on EMTC |
| CN115267522A (en) * | 2022-08-03 | 2022-11-01 | 清华四川能源互联网研究院 | Partial discharge detection system, method and partial discharge detection and calibration method |
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Effective date of registration: 20140109 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Jiaxing Power Supply Company, State Grid Zhejiang Electronic Power Company Address before: Jiaxing City, Zhejiang province 314000 North Road No. 99 Applicant before: Jiaxing Power Supply Company, State Grid Zhejiang Electronic Power Company |
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Application publication date: 20131225 |