CN108646154A - A kind of GIS cable terminations Partial Discharge Detection and analysis and diagnosis system - Google Patents
A kind of GIS cable terminations Partial Discharge Detection and analysis and diagnosis system Download PDFInfo
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- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
本发明公开了一种GIS电缆终端局部放电检测及分析诊断系统，包括超声波传感器、特高频传感器、高频脉冲电流传感器、数据采集单元、数据存储服务器和分析诊断平台，超声波传感器和特高频传感器安装在GIS电缆终端尾管上，高频脉冲电流传感器安装在GIS电缆终端的接地线上，超声波传感器、特高频传感器和高频脉冲电流传感器分别与数据采集单元相连接，数据采集单元与数据存储服务器相连接，数据存储服务器与分析诊断平台相连接。通过采用三种不同的检测方法对GIS电缆终端进行长期局部放电在线监测，可有效解决现场干扰大的问题，提升局部放电信号分析诊断的准确性。
The invention discloses a GIS cable terminal partial discharge detection, analysis and diagnosis system, which includes an ultrasonic sensor, a UHF sensor, a high frequency pulse current sensor, a data acquisition unit, a data storage server, an analysis and diagnosis platform, an ultrasonic sensor and a UHF sensor. The sensor is installed on the tailpipe of the GIS cable terminal, the high-frequency pulse current sensor is installed on the ground wire of the GIS cable terminal, the ultrasonic sensor, the UHF sensor and the high-frequency pulse current sensor are respectively connected to the data acquisition unit, and the data acquisition unit is connected The data storage server is connected, and the data storage server is connected with the analysis and diagnosis platform. By using three different detection methods for long-term partial discharge on-line monitoring of GIS cable terminals, it can effectively solve the problem of large field interference and improve the accuracy of partial discharge signal analysis and diagnosis.
Description
技术领域technical field
本发明涉及电力设备局部放电检测技术领域，尤其涉及一种GIS电缆终端局部放电检测及分析诊断系统。The invention relates to the technical field of partial discharge detection of electric power equipment, in particular to a GIS cable terminal partial discharge detection and analysis diagnosis system.
背景技术Background technique
局部放电是GIS、开关柜、电缆以及其它一些高压电气设备绝缘缺陷的主要表现形式，而局部放电进一步发展则是造成电力设备绝缘失效的主要原因。统计数据表明，接近85%的电力设备事故是由局部放电引起。局部放电检测是定量分析绝缘劣化过程的有效方法，因此对于GIS电缆终端开展局部放电检测具有重要意义。Partial discharge is the main manifestation of insulation defects in GIS, switch cabinets, cables and other high-voltage electrical equipment, and the further development of partial discharge is the main cause of insulation failure of power equipment. Statistics show that nearly 85% of power equipment accidents are caused by partial discharge. Partial discharge detection is an effective method to quantitatively analyze the insulation degradation process, so it is of great significance to carry out partial discharge detection on GIS cable terminals.
由于高压电缆局部放电信号微弱，在现场噪声和外界电磁干扰的影响下，高压电缆现场局部放电检测和分析诊断难度较大。目前针对110kV及以上GIS电缆终端的局部放电检测方法，根据检测到的放电信号频率不同主要有超声波、特高频以及高频脉冲电流法。单一的检测方法无法有效全面的发现GIS电缆终端内部的局部放电信号，且局部放电信号的分析诊断对检测人员的现场测试经验要求极高，有时在现场即使发现信号，也无法准确判断局部放电的严重程度。Due to the weak partial discharge signal of high-voltage cables, under the influence of field noise and external electromagnetic interference, it is difficult to detect and analyze the partial discharge of high-voltage cables. At present, the partial discharge detection methods for 110kV and above GIS cable terminals mainly include ultrasonic, ultra-high frequency and high-frequency pulse current methods according to the frequency of the detected discharge signal. A single detection method cannot effectively and comprehensively discover the partial discharge signal inside the GIS cable terminal, and the analysis and diagnosis of the partial discharge signal requires extremely high on-site testing experience of the inspectors. Sometimes even if the signal is found on the spot, the partial discharge signal cannot be accurately judged. severity.
发明内容Contents of the invention
针对现有技术存在的缺陷，本发明提供一种GIS电缆终端局部放电检测及分析诊断系统，能够实现对GIS电缆终端局部放电的全面监测及对局部放电信号的异地远程测量和远程诊断。Aiming at the defects existing in the prior art, the present invention provides a GIS cable terminal partial discharge detection and analysis diagnosis system, which can realize comprehensive monitoring of GIS cable terminal partial discharge and remote measurement and remote diagnosis of partial discharge signals.
为达到上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种GIS电缆终端局部放电检测及分析诊断系统，包括超声波传感器、特高频传感器、高频脉冲电流传感器、数据采集单元、数据存储服务器和分析诊断平台，所述超声波传感器和特高频传感器安装在GIS电缆终端尾管上，所述高频脉冲电流传感器安装在GIS电缆终端的接地线上，所述超声波传感器、特高频传感器和高频脉冲电流传感器分别与所述数据采集单元相连接，所述数据采集单元与所述数据存储服务器相连接，所述数据存储服务器与所述分析诊断平台相连接。A GIS cable terminal partial discharge detection and analysis diagnosis system, including an ultrasonic sensor, a UHF sensor, a high frequency pulse current sensor, a data acquisition unit, a data storage server and an analysis and diagnosis platform, the ultrasonic sensor and the UHF sensor are installed On the tail pipe of the GIS cable terminal, the high-frequency pulse current sensor is installed on the ground wire of the GIS cable terminal, and the ultrasonic sensor, the ultra-high frequency sensor and the high-frequency pulse current sensor are respectively connected with the data acquisition unit, The data collection unit is connected to the data storage server, and the data storage server is connected to the analysis and diagnosis platform.
进一步地，所述数据采集单元有三个通道；所述超声波传感器、特高频传感器和高频脉冲电流传感器分别通过电缆连接至所述数据采集单元的一个通道，所述超声波传感器和数据采集单元之间设置有第一信号放大器，所述特高频传感器和数据采集单元之间设置有第二信号放大器，所述高频脉冲电流传感器和数据采集单元之间设置有宽带增益放大器。Further, the data acquisition unit has three channels; the ultrasonic sensor, the UHF sensor and the high frequency pulse current sensor are respectively connected to one channel of the data acquisition unit through a cable, and the ultrasonic sensor and the data acquisition unit A first signal amplifier is arranged between the UHF sensor and the data acquisition unit, a second signal amplifier is arranged between the high frequency pulse current sensor and the data acquisition unit, and a broadband gain amplifier is arranged between the high frequency pulse current sensor and the data acquisition unit.
进一步地，所述电缆为BNC同轴电缆。Further, the cable is a BNC coaxial cable.
进一步地，所述超声波传感器的传感原件采用压电晶体。Further, the sensing element of the ultrasonic sensor adopts piezoelectric crystal.
进一步地，所述压电晶体采用弧面设计。Further, the piezoelectric crystal adopts a curved surface design.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1、本发明能够对GIS电缆终端进行局部放电长期在线监测，可以监测放电信号的稳定性，信号发展趋势，有效地解决了现场干扰问题，提升了电缆终端内部绝缘缺陷的检出率；1. The present invention can carry out long-term online monitoring of partial discharge on the GIS cable terminal, can monitor the stability of the discharge signal and the signal development trend, effectively solve the problem of on-site interference, and improve the detection rate of the internal insulation defect of the cable terminal;
2、采用三种不同方法进行联合检测，通过对不同方法的检测结果进行对比分析，提高了局部放电信号分析诊断的准确性，实现全面检测；2. Three different methods are used for joint detection. By comparing and analyzing the detection results of different methods, the accuracy of partial discharge signal analysis and diagnosis is improved, and comprehensive detection is realized;
3、通过将局部放电检测数据传输到后台的分析诊断平台，将现场检测人员与局部放电诊断人员进行分离，实现了局部放电信号的异地远程测量、远程诊断，弥补了现场测试人员因经验欠缺无法准确诊断局部放电信号的不足。3. By transmitting the partial discharge detection data to the analysis and diagnosis platform in the background, the on-site inspection personnel and the partial discharge diagnosis personnel are separated, and the remote measurement and remote diagnosis of the partial discharge signal are realized, which makes up for the lack of experience of the field test personnel. Accurately diagnose deficiencies in partial discharge signals.
附图说明Description of drawings
为了更清楚地说明本发明实施例的技术方案，以下将对实施例描述中所需要使用的附图作简单地介绍。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments.
图1为本发明的实施示意图。Figure 1 is a schematic diagram of the implementation of the present invention.
具体实施方式Detailed ways
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作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 following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
参照图1，本发明一个优选的实施例提供一种GIS电缆终端局部放电检测及分析诊断系统，包括：超声波传感器4、特高频传感器5、高频脉冲电流传感器6、第一信号放大器7、第二信号放大器8、宽带增益放大器9、数据采集单元10、数据存储服务器11、分析诊断平台12。With reference to Fig. 1, a preferred embodiment of the present invention provides a kind of GIS cable terminal partial discharge detection and analysis diagnosis system, comprises: Ultrasonic sensor 4, ultra-high frequency sensor 5, high frequency pulse current sensor 6, first signal amplifier 7, A second signal amplifier 8 , a broadband gain amplifier 9 , a data acquisition unit 10 , a data storage server 11 , and an analysis and diagnosis platform 12 .
超声波传感器4安装在GIS电缆终端尾管1上，用于检测GIS电缆终端内的超声波信号，并将超声波信号传输给数据采集单元10；超声波传感器4的传感原件采用压电晶体，并且压电晶体前段采用与GIS电缆终端尾管相同的弧面形状，通过弧面设计有利于更好的接收GIS电缆终端的放电信号。特高频传感器5安装在GIS电缆终端尾管1上，用于检测GIS电缆终端内的特高频信号，并将特高频信号传输给数据采集单元10。高频脉冲电流传感器6安装在GIS电缆终端接地线3上，用于检测GIS电缆终端内的高频脉冲电流信号，并将高频脉冲电流信号传输给数据采集单元10，接地线3与GIS终端尾管1上的接地端子2连接。The ultrasonic sensor 4 is installed on the GIS cable terminal tailpipe 1 to detect the ultrasonic signal in the GIS cable terminal and transmit the ultrasonic signal to the data acquisition unit 10; the sensing element of the ultrasonic sensor 4 is a piezoelectric crystal, and the piezoelectric The front section of the crystal adopts the same arc surface shape as the GIS cable terminal tail pipe, and the arc surface design is conducive to better receiving the discharge signal of the GIS cable terminal. The UHF sensor 5 is installed on the tailpipe 1 of the GIS cable terminal for detecting the UHF signal in the GIS cable terminal and transmitting the UHF signal to the data acquisition unit 10 . The high-frequency pulse current sensor 6 is installed on the ground wire 3 of the GIS cable terminal, and is used to detect the high-frequency pulse current signal in the GIS cable terminal, and transmits the high-frequency pulse current signal to the data acquisition unit 10, the ground wire 3 and the GIS terminal Ground terminal 2 on tailpipe 1 is connected.
数据采集单元10有三个通道。超声波传感器4通过一根BNC同轴电缆连接至数据采集单元10的一个通道，超声波传感器4和数据采集单元10之间设置有第一信号放大器7。第一信号放大器7用于将检测到的超声波信号放大，使超声波信号更加清晰，提高检测结果的准确性。特高频传感器5通过一根BNC同轴电缆连接至数据采集单元10的一个通道，特高频传感器5和数据采集单元10之间设置有第二信号放大器8。第二信号放大器8用于将检测到的特高频信号放大，使特高频信号更加清晰，提高检测结果的准确性。高频脉冲电流传感器6通过一根BNC同轴电缆连接至数据采集单元10的一个通道，宽带增益放大器9和数据采集单元10之间设置有宽带增益放大器9。宽带增益放大器9用于放大高频脉冲电流信号，使高频脉冲电流信号更加清晰，提高检测结果的准确性。The data acquisition unit 10 has three channels. The ultrasonic sensor 4 is connected to one channel of the data acquisition unit 10 through a BNC coaxial cable, and a first signal amplifier 7 is arranged between the ultrasonic sensor 4 and the data acquisition unit 10 . The first signal amplifier 7 is used to amplify the detected ultrasonic signal to make the ultrasonic signal clearer and improve the accuracy of the detection result. The UHF sensor 5 is connected to a channel of the data acquisition unit 10 through a BNC coaxial cable, and a second signal amplifier 8 is arranged between the UHF sensor 5 and the data acquisition unit 10 . The second signal amplifier 8 is used to amplify the detected UHF signal to make the UHF signal clearer and improve the accuracy of the detection result. The high-frequency pulse current sensor 6 is connected to a channel of the data acquisition unit 10 through a BNC coaxial cable, and a broadband gain amplifier 9 is arranged between the broadband gain amplifier 9 and the data acquisition unit 10 . The broadband gain amplifier 9 is used to amplify the high-frequency pulse current signal to make the high-frequency pulse current signal clearer and improve the accuracy of the detection result.
数据采集单元10通过485通讯总线连接至数据存储服务器11，将采集到的超声波信号、特高频信号及高频脉冲电流信号等局部放电信号发送至数据存储服务器11；数据存储服务器11放置于变电站主控室内，用于将检测到的所述局部放电信号进行本地存储备份。The data acquisition unit 10 is connected to the data storage server 11 through the 485 communication bus, and sends the collected partial discharge signals such as ultrasonic signals, ultra-high frequency signals and high-frequency pulse current signals to the data storage server 11; the data storage server 11 is placed in the substation The main control room is used for locally storing and backing up the detected partial discharge signal.
数据存储服务器11通过光纤连接至分析诊断平台12；分析诊断平台12放置于后台监控中心，用于接收数据存储服务器上传的局部放电信号。后台监控人员发现异常局部放电信号，可以联合测试经验丰富的专家对异常信号进行联合分析诊断，准确判断局部放电信号的严重程度，提出相对应的运维策略和处置建议。The data storage server 11 is connected to the analysis and diagnosis platform 12 through an optical fiber; the analysis and diagnosis platform 12 is placed in the background monitoring center for receiving partial discharge signals uploaded by the data storage server. When background monitoring personnel find abnormal partial discharge signals, they can jointly analyze and diagnose the abnormal signals with experienced experts, accurately judge the severity of partial discharge signals, and put forward corresponding operation and maintenance strategies and disposal suggestions.
本发明能够对GIS电缆终端进行局部放电长期在线监测，可以监测放电信号的稳定性，信号发展趋势，有效地解决了现场干扰问题，提升了电缆终端内部绝缘缺陷的检出率；采用三种不同方法进行联合检测，通过对不同方法的检测结果进行对比分析，提高了局部放电信号分析诊断的准确性，实现全面检测；通过将局部放电检测数据传输到后台的分析诊断平台，将现场检测人员与局部放电诊断人员进行分离，实现了局部放电信号的异地远程测量、远程诊断，弥补了现场测试人员因经验欠缺无法准确诊断局部放电信号的不足。The present invention can carry out long-term online monitoring of partial discharge on the GIS cable terminal, can monitor the stability of the discharge signal, and the signal development trend, effectively solves the problem of on-site interference, and improves the detection rate of the internal insulation defect of the cable terminal; adopts three different method to carry out joint detection, by comparing and analyzing the detection results of different methods, the accuracy of partial discharge signal analysis and diagnosis is improved, and comprehensive detection is realized; by transmitting the partial discharge detection data to the analysis and diagnosis platform in the background, on-site detection personnel and Partial discharge diagnosis personnel are separated to realize remote measurement and remote diagnosis of partial discharge signals, which makes up for the inadequacy of on-site testers who cannot accurately diagnose partial discharge signals due to lack of experience.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.
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| CN111044861A (en) * | 2019-12-20 | 2020-04-21 | 上饶市中科院云计算中心大数据研究院 | Partial discharge detection method and device |
| CN112666432A (en) * | 2020-12-30 | 2021-04-16 | 国网河南省电力公司南阳供电公司 | Cable joint discharge trace trend analysis method based on pressure wave detection |
| CN112798914A (en) * | 2021-02-22 | 2021-05-14 | 广州智丰电气科技有限公司 | A multifunctional and multipurpose cable partial discharge detection sensor |
| CN113075519A (en) * | 2021-05-18 | 2021-07-06 | 武汉朗德电气有限公司 | Device for GIL partial discharge monitoring and arc fault positioning |
| CN113533879A (en) * | 2021-06-11 | 2021-10-22 | 南方电网科学研究院有限责任公司 | GIS equipment detectable rate calculation method based on fault simulation test |
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Application publication date: 20181012 |