CN107907804A - A kind of GIS device ultrasonic wave partial discharge detecting system - Google Patents
A kind of GIS device ultrasonic wave partial discharge detecting system Download PDFInfo
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Abstract
Description
技术领域technical field
本发明属于电力技术领域，具体涉及一种GIS设备超声波局部放电检测系统。The invention belongs to the technical field of electric power, and in particular relates to an ultrasonic partial discharge detection system for GIS equipment.
背景技术Background technique
GIS设备即气体绝缘组合电器设备，定义为全部或者部分采用气体而不采用处于大气压下的空气作为绝缘介质的金属封闭开关设备。它的主接线方式，包括断路器、隔离开关、接地开关、互感器、避雷器、母线、连接件和出线终端等全部封闭于接地的金属筒内，筒内部充有绝缘性能和灭弧性能优异的六氟化硫(化学分子式为SF6)气体作为绝缘和灭弧介质。与常规敞开式变电站相比，GIS的优点在于结构紧凑、占地面积小、可靠性高、配置灵活、安装方便、安全性强、环境适应能力强，维护工作量很小，其主要部件的维修间隔不小于20年。“局部放电”(局放)是指在电力设备的绝缘系统中，只有部分区域发生放电，而没有贯穿施加电压的导体之间，即尚未击穿，局部放电能量并不大，短时间内并不能影响到设备的绝缘强度，但是若长期存在，则在运行电压下，这些微弱的放电将产生累积效应，使整个绝缘的强度逐渐降低，最终导致绝缘击穿。局放是一种脉冲放电,它会在电力设备内部和周围空间产生一系列的光、声、电气和机械的振动等物理现象和化学现象，这些伴随局部放电产生的现象可以为监测电力设备内部绝缘状况提供检测信号。GIS equipment is gas-insulated combined electrical equipment, defined as a metal-enclosed switchgear that uses gas in whole or in part instead of air under atmospheric pressure as the insulating medium. Its main wiring method, including circuit breaker, isolating switch, grounding switch, transformer, lightning arrester, busbar, connectors and outlet terminals, etc. are all enclosed in a grounded metal cylinder, which is filled with insulation and arc extinguishing performance. Sulfur hexafluoride (chemical formula SF6) gas is used as insulation and arc extinguishing medium. Compared with conventional open substations, GIS has the advantages of compact structure, small footprint, high reliability, flexible configuration, convenient installation, strong safety, strong environmental adaptability, and small maintenance workload. The interval is not less than 20 years. "Partial discharge" (partial discharge) means that in the insulation system of power equipment, only a part of the area discharges, but does not penetrate between the conductors that apply the voltage, that is, it has not yet broken down, and the energy of the partial discharge is not large, and it will not occur in a short time. It cannot affect the insulation strength of the equipment, but if it exists for a long time, these weak discharges will have a cumulative effect under the operating voltage, which will gradually reduce the strength of the entire insulation and eventually lead to insulation breakdown. Partial discharge is a kind of pulse discharge, which will produce a series of physical and chemical phenomena such as light, sound, electrical and mechanical vibration in the interior and surrounding space of the power equipment. The insulation condition provides a detection signal.
超声波局放检测技术就是通过检测运行中GIS设备内部局放时伴随产生的声波信号，来反映GIS内部局放量大小的带电检测手段，超声波局放检测时，工作人员需要将超声波传感器紧贴在GIS设备腔体外壁上。国家电网公司企业标准《变电设备带电检测工作指导意见》中规定，为获取GIS设备状态量，评估设备状态，及时发现事故隐患，需定期对110kV及以上GIS设备进行超声波局部放电带电检测。具体要求220kV及以下电压等级设备1年进行一次；国家电网公司企业标准《Q GDW 11059.1-2013超声波法局部放电带电检测技术现场应用导则》8.3.(b)规定，“对于GIS设备，利用外露的盆式绝缘子处或内置式传感器，在断路器断口处、隔离开关、接地开关、电流互感器、电压互感器、避雷器、导体连接部件等处均应设置测点。一般GIS壳体轴线方向每间隔0.5m左右选取一处，测量点尽量选择在隔室下方。对于较长的母线气室，可适当放宽检测点的间距；应每次保持测量点的位置一致，以便于进行比较分析。”Ultrasonic partial discharge detection technology is a live detection method that reflects the size of the internal partial discharge of GIS by detecting the acoustic signal accompanying the internal partial discharge of GIS equipment during operation. During ultrasonic partial discharge detection, the staff need to attach the ultrasonic sensor to the GIS On the outer wall of the equipment cavity. The State Grid Corporation of China's enterprise standard "Guiding Opinions on Live Detection of Substation Equipment" stipulates that in order to obtain the status of GIS equipment, evaluate the status of equipment, and discover potential accidents in time, it is necessary to conduct ultrasonic partial discharge live detection on GIS equipment of 110kV and above on a regular basis. It is specifically required that equipment with a voltage level of 220kV and below should be carried out once a year; State Grid Corporation of China’s enterprise standard "Q GDW 11059.1-2013 Guidelines for Field Application of Partial Discharge Live Detection Technology by Ultrasonic Method" stipulates in 8.3.(b), "For GIS equipment, use exposed The basin-type insulator or the built-in sensor should set measuring points at the breaker of the circuit breaker, isolating switch, grounding switch, current transformer, voltage transformer, lightning arrester, conductor connecting parts, etc. Generally, the axial direction of the GIS shell should be set every Choose a place at an interval of about 0.5m, and the measurement point should be selected below the compartment as much as possible. For a longer busbar air chamber, the distance between the detection points can be appropriately relaxed; the location of the measurement point should be kept consistent every time to facilitate comparative analysis.”
近20年来，由于其结构紧凑、占地面积小、可靠性高、配置灵活、安装方便、安全性强、环境适应能力强，维护工作量很小等优越特性，GIS变电站及GIS设备的保有量逐年激增，从2006年至2016年本单位所管辖110kV及220kV电压等级GIS变电站从2座增长为57座，站内GIS设备超声波局放测试点数，简单来讲，是与变电站规模以及电压等级有关，例如保定地区最大的220kV变电站内GIS超声波局部放电测点高达1386个，最少的测点也有742个。In the past 20 years, due to its advantages such as compact structure, small footprint, high reliability, flexible configuration, convenient installation, strong safety, strong environmental adaptability, and small maintenance workload, the number of GIS substations and GIS equipment It has increased rapidly year by year. From 2006 to 2016, the 110kV and 220kV voltage level GIS substations under the jurisdiction of the unit increased from 2 to 57. The number of ultrasonic partial discharge test points for GIS equipment in the station is simply related to the scale and voltage level of the substation. For example, in the largest 220kV substation in Baoding, there are as many as 1386 GIS ultrasonic partial discharge measurement points, and the least number of measurement points is 742.
现阶段GIS超声波局放测试所遇到的问题大致如下：At this stage, the problems encountered in GIS ultrasonic partial discharge testing are roughly as follows:
1)测试点位置选择不规范及遗漏测点。相关规程对测试点有规定，例如断路器断口必须设置测点、母线上的测点间隔不大于0.5米且测点宜选取在母线筒下侧，等等，由于专业培训欠缺或者培训不细致亦或者现场测点位置特殊不好开展测量等原因，测试点选择不规范、缺点、漏点现象经常发生；1) The selection of the test point location is not standardized and the test point is missed. Relevant regulations have regulations on test points. For example, the breaker must be equipped with test points, the distance between the test points on the busbar should not be greater than 0.5 meters, and the test points should be selected on the lower side of the busbar barrel. Or the location of the on-site measuring point is not suitable for measurement, etc., the selection of test points is not standardized, shortcomings, and leaks often occur;
2)无法保持每次测试测点位置一致。现场测试人员对超声波测点的选择受主观意识影响很大，简单来说，在三维立体的GIS设备体上选择若干满足规程要求的测试点，每名测试人员都会有不一样的选择方法，况且每年开展测试时的工作人员不固定，这样基本不能保证每次测试测点的一致性，造成历年测试数据纵向对比的误差，从而导致对设备状态的误判断。即便测试人员固定，但是时隔一年，也很难选出同样的测点；2) It is impossible to keep the position of each test measuring point consistent. The selection of ultrasonic measuring points by on-site testers is greatly affected by subjective consciousness. Simply put, each tester will have a different selection method when selecting a number of test points that meet the requirements of the regulations on the three-dimensional GIS equipment body. The staff members who carry out the test every year are not fixed, which basically cannot guarantee the consistency of the measurement points of each test, resulting in errors in the longitudinal comparison of the test data over the years, resulting in misjudgment of the equipment status. Even if the testers are fixed, it is difficult to select the same measuring point after a year;
3)单个测点命名十分复杂。每次测试完毕后，工作人员首先需要对测点进行命名，然后记录数据。目前测试点的命名方法是以测点所在位置命名的，例如133间隔与134间隔间靠近133间隔第一通盆东侧、212间隔A相断路器断口，等等。这种命名方式复杂且笼统模糊，如举例中133间隔与134间隔靠近133间隔第一个通盆东侧有无数个测点；212间隔A相断路器断口横切面圆周上也可找出无数个测点，并且这种命名方式增加了后期纸上记录数据以及电子数据录入的工作量；3) The naming of a single measuring point is very complicated. After each test, the staff first need to name the measuring point and then record the data. The current naming method of test points is based on the location of the measuring point, for example, between bay 133 and bay 134, close to the east side of the first basin of bay 133, bay 212 A-phase circuit breaker break, and so on. This naming method is complex and vague. For example, in the example, there are countless measuring points on the east side of the first through-basin of the 133 bay and 134 bay near the 133 bay; 212 bays can also find countless measuring points on the circumference of the cross section of the A-phase circuit breaker. measurement points, and this naming method increases the workload of recording data on paper and electronic data entry in the later stage;
4)工作人员后期数据处理量巨大。由于测试点繁多，工作人员每测完一个点都需要给该点命名，记录数据，并且要将纸上记录的数据转换成电子数据并上传到公司生产管理系统(PMS)里，如此导致了后期数据处理所需时间要几倍于现场开展测试的时间，降低了工作效率并且增加了错误率。4) The post-processing data processing volume of the staff is huge. Due to the large number of test points, the staff need to name the point, record the data, and convert the data recorded on paper into electronic data and upload them to the company's production management system (PMS). The time required for data processing is several times that of on-site testing, reducing work efficiency and increasing error rates.
发明内容Contents of the invention
本发明克服了现有技术的缺点，提供了一种GIS设备超声波局部放电检测系统，该系统小巧灵活、便于布置、操作方便，不影响GIS设备安全运行，能够避免测试点位置不合理、命名复杂及其造成的工作量大的问题。The present invention overcomes the shortcomings of the prior art and provides an ultrasonic partial discharge detection system for GIS equipment. The system is small and flexible, easy to arrange and easy to operate, does not affect the safe operation of GIS equipment, and can avoid unreasonable test point locations and complicated naming And the problem of heavy workload caused by it.
本发明的具体技术方案是：Concrete technical scheme of the present invention is:
一种GIS设备超声波局部放电检测系统，该检测系统包括与GIS设备外壁相接触的一组超声波传感器，关键点是，所述检测系统还包括一组带有定位通孔的定位板，定位板与超声波传感器一一对应，超声波传感器的检测端穿过定位通孔接触GIS设备外壁，定位板表面设置有条形码或二维码，所述检测系统还包括有用于读取条形码或二维码的移动终端，移动终端中设置有信息输入单元、信息处理单元、信息存储单元和显示屏，信息输入单元、信息处理单元和信息存储单元的输出端均与显示屏的信息输入端相连，信息输入单元的输出端与信息处理单元的输入端相连，信息处理单元的输出端与信息存储单元的输入端相连。An ultrasonic partial discharge detection system for GIS equipment, the detection system includes a group of ultrasonic sensors in contact with the outer wall of the GIS equipment, the key point is that the detection system also includes a group of positioning plates with positioning through holes, the positioning plate and One-to-one correspondence of ultrasonic sensors, the detection end of the ultrasonic sensor passes through the positioning through hole to contact the outer wall of the GIS equipment, and the surface of the positioning plate is provided with a barcode or two-dimensional code, and the detection system also includes a mobile terminal for reading the barcode or two-dimensional code , the mobile terminal is provided with an information input unit, an information processing unit, an information storage unit and a display screen, the output ends of the information input unit, the information processing unit and the information storage unit are all connected to the information input end of the display screen, and the output of the information input unit The terminal is connected to the input terminal of the information processing unit, and the output terminal of the information processing unit is connected to the input terminal of the information storage unit.
所述的定位板为软磁板，定位板贴附于GIS设备外壁上。The positioning plate is a soft magnetic plate, and the positioning plate is attached to the outer wall of the GIS equipment.
所述的移动终端为手机、平板电脑或者具有识别条形码和二维码功能的GIS超声波局部放电检测仪。The mobile terminal is a mobile phone, a tablet computer or a GIS ultrasonic partial discharge detector with the function of identifying barcodes and two-dimensional codes.
所述的移动终端还设置有报警单元，报警单元为报警灯或者蜂鸣器，信息处理单元的输出端与报警灯或者蜂鸣器的控制端相连。The mobile terminal is also provided with an alarm unit, the alarm unit is an alarm lamp or a buzzer, and the output end of the information processing unit is connected with the control end of the alarm lamp or the buzzer.
本发明的有益效果是：本发明借助小巧灵活、设置方便的定位板为超声波传感器提供精确的测点位置，即定位通孔位置，保证了每一次检测位置的一致，使得每一个测点多次检测数据的比较更具有参考价值，同时，定位板上的编码为测点提供了简单的命名并公开显示，可供操作人员进行比对参考，通过移动终端扫描定位板上的条形码或者二维码，能够为操作人员在线显示测点对应设备的信息和历史检测数据，操作人员通过移动终端录入检测数据并与历史数据进行对比，提示操作人员检测数据是否存在异常，有利于操作人员屏蔽错误信息，使得检测数据的利用更加准确有效，避免了异常数据对检测结果的干扰；此外，操作人员通过移动终端进行检测数据信息的录入和上传，简化了工作流程，使操作人员从繁重的数据整理上报工作中解放出来。The beneficial effects of the present invention are: the present invention provides accurate measuring point positions for the ultrasonic sensor by means of a small, flexible and conveniently set positioning plate, that is, the position of the positioning through hole, which ensures the consistency of each detection position and makes each measuring point multiple times The comparison of detection data has more reference value. At the same time, the code on the positioning board provides a simple name for the measuring point and displays it publicly, which can be compared and referenced by the operator. Scan the barcode or QR code on the positioning board through the mobile terminal , can display the information of the equipment corresponding to the measuring point and historical detection data online for the operator. The operator enters the detection data through the mobile terminal and compares it with the historical data, prompting the operator whether the detection data is abnormal, which is helpful for the operator to shield error information. It makes the use of detection data more accurate and effective, and avoids the interference of abnormal data on the detection results; in addition, the operator enters and uploads the detection data information through the mobile terminal, which simplifies the work process and enables the operator to start from the heavy data sorting and reporting work liberated from.
附图说明Description of drawings
图1为本发明具体实施例中定位板的结构示意图。Fig. 1 is a schematic structural diagram of a positioning plate in a specific embodiment of the present invention.
附图中，1、超声波传感器，2、定位板，201、定位通孔，202、上耳板，203、下耳板。In the accompanying drawings, 1, an ultrasonic sensor, 2, a positioning plate, 201, a positioning through hole, 202, an upper ear plate, and 203, a lower ear plate.
具体实施方式Detailed ways
本发明涉及一种GIS设备超声波局部放电检测系统，该检测系统包括与GIS设备外壁相接触的一组超声波传感器1，所述检测系统还包括一组带有定位通孔201的定位板2，定位板2与超声波传感器1一一对应，超声波传感器1的检测端穿过定位通孔201接触GIS设备外壁，定位板2表面设置有条形码或二维码，所述检测系统还包括有用于读取条形码或二维码的移动终端，移动终端中设置有信息输入单元、信息处理单元、信息存储单元和显示屏，信息输入单元、信息处理单元和信息存储单元的输出端均与显示屏的信息输入端相连，信息输入单元的输出端与信息处理单元的输入端相连，信息处理单元的输出端与信息存储单元的输入端相连。The invention relates to a GIS equipment ultrasonic partial discharge detection system, the detection system includes a group of ultrasonic sensors 1 in contact with the outer wall of the GIS equipment, the detection system also includes a group of positioning plates 2 with positioning through holes 201, positioning The board 2 corresponds to the ultrasonic sensor 1 one by one. The detection end of the ultrasonic sensor 1 passes through the positioning through hole 201 to contact the outer wall of the GIS equipment. The surface of the positioning board 2 is provided with a barcode or a two-dimensional code. The detection system also includes a device for reading the barcode. Or a mobile terminal with a two-dimensional code, the mobile terminal is provided with an information input unit, an information processing unit, an information storage unit and a display screen, and the output terminals of the information input unit, the information processing unit and the information storage unit are all connected to the information input terminals of the display screen The output end of the information input unit is connected to the input end of the information processing unit, and the output end of the information processing unit is connected to the input end of the information storage unit.
具体实施例，如图1所示，定位板2为贴附于GIS设备外壁上的软磁板，不影响设备的正常运行，定位板2包括中间带有定位通孔201的圆形板及其上下两端的上耳板202和下耳板203，定位通孔201处露出的GIS设备外壁即为测点位置，上耳板202外表面为编码区，该编码区内喷涂该定位板2的编码，每个定位板2设置有区别于其他定位板2的唯一的编码，编码采用变电站名加阿拉伯数字的方式，下耳板203外表面为扫码区，扫码区内喷涂有二维码，每个定位板2的二维码信息是唯一的；移动终端为手机、平板电脑或者具有识别条形码和二维码功能的GIS超声波局部放电检测仪，移动终端还设置有报警单元，报警单元为报警灯或者蜂鸣器，信息处理单元的输出端与报警灯或者蜂鸣器的控制端相连；实际工作中，一个GIS设备需要在不同位置设置多个定位板2，移动终端可以为一个，依次进行所有定位板2的扫码工作并上传数据，也可以为多个，同时进行扫码工作并上传数据，首次使用该检测系统时，需要将定位板2逐一定位、布置，定位板2一经固定不得随意移动，之后每次进行GIS超声波局部放电测试时只需要按照定位板2标定的测点逐一进行测试并将测试数据上传保存即可。In a specific embodiment, as shown in Figure 1, the positioning plate 2 is a soft magnetic plate attached to the outer wall of the GIS equipment, which does not affect the normal operation of the equipment. The positioning plate 2 includes a circular plate with a positioning through hole 201 in the middle and its The upper ear plate 202 and the lower ear plate 203 at the upper and lower ends, the outer wall of the GIS equipment exposed at the positioning through hole 201 is the position of the measuring point, and the outer surface of the upper ear plate 202 is the code area, and the code of the positioning plate 2 is sprayed in the code area Each positioning board 2 is provided with a unique code that is different from other positioning boards 2. The code adopts the method of substation name plus Arabic numerals. The outer surface of the lower ear plate 203 is a code scanning area, and a two-dimensional code is sprayed in the scanning code area. The two-dimensional code information of each positioning board 2 is unique; the mobile terminal is a mobile phone, a tablet computer or a GIS ultrasonic partial discharge detector with the function of identifying barcodes and two-dimensional codes, and the mobile terminal is also provided with an alarm unit, which is an alarm unit. Light or buzzer, the output end of the information processing unit is connected to the control end of the alarm light or buzzer; in actual work, a GIS device needs to be set with multiple positioning boards 2 at different positions, and the mobile terminal can be one, and proceed in turn All the positioning boards 2 can scan codes and upload data, or multiple ones can scan codes and upload data at the same time. When using the detection system for the first time, the positioning boards 2 need to be positioned and arranged one by one. Once the positioning boards 2 are fixed, they cannot Move at will, and then each time you perform a GIS ultrasonic partial discharge test, you only need to test one by one according to the measuring points marked on the positioning board 2 and upload and save the test data.
移动终端中的信息输入单元为键盘、USB或串口中的至少一个，信息处理单元为CPU，信息存储单元为存储器，在实际工作中，使用手机作为移动终端较为方便，能够扫描二维码或者条形码，还可以通过实体键盘或者触摸虚拟键盘进行信息录入，还能够进行信息处理和信息存储。The information input unit in the mobile terminal is at least one of the keyboard, USB or serial port, the information processing unit is the CPU, and the information storage unit is the memory. In actual work, it is more convenient to use a mobile phone as a mobile terminal, which can scan two-dimensional codes or barcodes. , you can also enter information through the physical keyboard or touch the virtual keyboard, and can also perform information processing and information storage.
需要对GIS设备的局部放电进行检测时，操作人员将超声波传感器1放置在定位通孔201位置并与GIS设备外壁接触从而进行测量，这样可以为超声波传感器1检测提供统一的位置，每次检测时即使操作人员不同，也能够保证测点相同，方便同一测点历史数据的纵向比较；当移动终端扫描二维码后，显示屏上会显示该测点所在位置的相关信息，位置信息以文字和立体图示的方式展现，还会显示该测点对应设备的生产厂家、出厂及投入运行的时间、历次检测数据(包括检测时间、温湿度、检测数据以及所用测试仪器型号等)，显示屏还会弹出数据录入界面，操作人员可以将超声波传感器1的检测数据通过数据录入界面进行输入，数据包括空气背景、金属背景和检测数值，其中空气和金属背景是指测试环境中空气中和金属架构上存在的无法排除的固有干扰数值，移动终端中的信息处理单元将输入的检测数值与历史检测数据进行对比，无异常时，数据保存，如果出现异常即超出相关标准要求时，移动终端中的报警灯进行闪烁，起到提示作用，数据保存，随后保存的数据通过无线通信网络传送至专用数据库生产管理系统中。When it is necessary to detect the partial discharge of the GIS equipment, the operator places the ultrasonic sensor 1 at the location of the positioning through hole 201 and makes contact with the outer wall of the GIS equipment for measurement. This can provide a uniform location for the detection of the ultrasonic sensor 1. Even if the operators are different, the measuring point can be guaranteed to be the same, which is convenient for the vertical comparison of the historical data of the same measuring point; when the mobile terminal scans the QR code, the relevant information of the location of the measuring point will be displayed on the display screen, and the location information is expressed in text and It will be displayed in the form of a three-dimensional icon, and will also display the manufacturer of the equipment corresponding to the measuring point, the time of delivery and operation, and previous testing data (including testing time, temperature and humidity, testing data, and the type of testing equipment used, etc.). A data entry interface will pop up, and the operator can input the detection data of the ultrasonic sensor 1 through the data entry interface. The data includes air background, metal background and detection values, where the air and metal background refer to the test environment in the air and on the metal structure. If there is an inherent interference value that cannot be ruled out, the information processing unit in the mobile terminal compares the input detection value with the historical detection data. If there is no abnormality, the data will be saved. The light flashes as a reminder, the data is saved, and then the saved data is transmitted to the special database production management system through the wireless communication network.
通过使用该检测系统，GIS设备超声波局部放电带电检测的流程及工艺得到了优化，根据GIS设备超声波局部放电带电检测现场布置传感器的实际需要进行定位板2的定位安装，定位板2小巧灵活、便于布置、操作方便，不影响GIS设备安全运行；编码和二维码的设置，使得每一个定位板2都能精准地对应一个测点，避免了现有技术中测点位置选择不规范、有遗漏或者不能保持每次测点位置一致的情况，同时改善了现有技术中命名复杂、不能很好区别的缺点，此外，通过移动终端扫描二维码、在线输入测试数据的方式避免了现有技术中后期数据处理量大的问题，将操作人员从繁重的信息处理、整理工作中解放出来。Through the use of this detection system, the process and process of ultrasonic partial discharge live detection of GIS equipment have been optimized. According to the actual needs of GIS equipment ultrasonic partial discharge live detection site layout sensors, the positioning and installation of positioning board 2 is carried out. The positioning board 2 is small, flexible and convenient. The layout and operation are convenient, and it does not affect the safe operation of GIS equipment; the setting of codes and QR codes enables each positioning board 2 to accurately correspond to a measuring point, avoiding irregular and omissions in the selection of measuring point positions in the prior art Or the situation that the position of each measuring point cannot be kept consistent, and at the same time, the disadvantages of complicated naming and inability to distinguish well in the prior art are improved. In addition, the method of scanning the two-dimensional code and inputting the test data online by the mobile terminal avoids the disadvantages of the prior art The problem of large amount of data processing in the middle and late stages frees operators from heavy information processing and sorting work.
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