CN102116824A - Distributed local discharge on-line monitoring method and device for high voltage cable system - Google Patents
Distributed local discharge on-line monitoring method and device for high voltage cable system Download PDFInfo
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Abstract
本发明提供一种高压电缆系统分布式局部放电在线监测方法及装置,整条电缆线路每个附件处安装高频宽带电磁耦合传感器,传感器套接在电缆附件接地线或交叉互联线上来耦合局部放电信号,50Hz电流传感器套接在电缆本体上来耦合工频电流信号,下位机对传感器信号进行调理及高速采集并预处理,并通过光纤传输网络将数字信号传送至上位机监控软件,实现高压电缆设备分布式局部放电的在线监测。本发明的优点在于能够根据现场需要,通过对高压电缆三相附件进行分布式的同步高速采样,实现局部放电在线监测。
The invention provides a method and device for on-line monitoring of distributed partial discharge in a high-voltage cable system. A high-frequency broadband electromagnetic coupling sensor is installed at each attachment of the entire cable line, and the sensor is socketed on the ground wire or cross interconnection wire of the cable attachment to couple partial discharge. signal, the 50Hz current sensor is socketed on the cable body to couple the power frequency current signal, the lower computer performs conditioning, high-speed acquisition and preprocessing of the sensor signal, and transmits the digital signal to the upper computer monitoring software through the optical fiber transmission network to realize high-voltage cable equipment. On-line monitoring of distributed partial discharge. The invention has the advantage of being able to realize partial discharge on-line monitoring through distributed synchronous high-speed sampling of high-voltage cable three-phase accessories according to site needs.
Description
技术领域technical field
本发明涉及一种电缆设备检测装置,特别是涉及一种高压电缆系统分布式局部放电在线监测方法和装置。The invention relates to a cable equipment detection device, in particular to a distributed partial discharge online monitoring method and device for a high-voltage cable system.
背景技术Background technique
随着高压及超高压电力电缆的发展和应用,交联聚乙烯(XLPE)电力电缆以其合理的工艺和结构、优良的电气性能、安装敷设简单、运行维护工作少、安全可靠的特点,在电力系统中得到了越来越广泛的应用。高压超高压电缆系统作为城市供电和主网架的重要环节,在我国城市电网中已占据非常重要的地位。如何实现这些电缆设备的状态检测,保证电缆设备安全可靠运行,是目前国内外研究的热点。电缆系统局部放电在线检测可及时发现故障隐患,对绝缘劣化进行前期预报和评估,积极有效地预防电缆系统突发运行故障,是实现电缆设备状态检修至关重要的技术手段。With the development and application of high-voltage and extra-high-voltage power cables, cross-linked polyethylene (XLPE) power cables are widely used in China for their reasonable technology and structure, excellent electrical performance, simple installation and laying, less operation and maintenance work, and safety and reliability. It has been widely used in power system. As an important part of urban power supply and main grid, high-voltage and extra-high-voltage cable system has occupied a very important position in my country's urban power grid. How to realize the status detection of these cable equipment and ensure the safe and reliable operation of the cable equipment is a hot research topic at home and abroad. On-line detection of partial discharge in the cable system can detect potential faults in time, predict and evaluate insulation degradation in advance, and actively and effectively prevent sudden operating faults in the cable system. It is an essential technical means to achieve condition-based maintenance of cable equipment.
电缆附件例如中间接头都是在现场条件下人工制作安装的,其绝缘品质往往低于电缆本体绝缘品质,是电缆系统中绝缘薄弱环节。中间接头施工工艺不良形成的各种施工缺陷,使接头内电场分布不均匀,导致局部放电的产生。在工频电压下,局部放电将引起电缆绝缘中电树的产生和扩展,并加速绝缘的劣化,最终导致绝缘击穿。Cable accessories such as intermediate joints are manually manufactured and installed under on-site conditions, and their insulation quality is often lower than that of the cable body, which is the weak link in the insulation of the cable system. Various construction defects caused by poor construction technology of the intermediate joint make the electric field distribution in the joint uneven, resulting in partial discharge. Under power frequency voltage, partial discharge will cause the generation and expansion of electric tree in the cable insulation, and accelerate the deterioration of insulation, eventually leading to insulation breakdown.
目前许多高压电缆局部放电在线监测系统现场测量效果不理想,其主要原因有:(1)外界强电磁场干扰源很多,单纯依靠硬件技术实现剔除和防止外界电磁干扰难度很大,且许多软硬件结合的抗干扰方法对测量设置有所要求;(2)采集的局部放电信号微弱,幅值很小,极易被背景噪声淹没;(3)窄频带滤波器和高倍数的放大器使得采集到的信号的原始波形畸变,容易导致误判;(4)电缆局部放电信号识别技术不够成熟,缺乏现场测量的局部放电脉冲信号波形、频率及幅值的识别判断技术;(5)缺乏XLPE电缆绝缘劣化的评价基础理论的研究和运行状态判据等实际运行经验的积累。At present, the on-site measurement results of many high-voltage cable partial discharge online monitoring systems are not ideal. The main reasons are: (1) There are many sources of external strong electromagnetic field interference. The anti-interference method has certain requirements for the measurement settings; (2) the collected partial discharge signal is weak, the amplitude is small, and it is easily submerged by the background noise; (3) the narrow-band filter and the high multiple amplifier make the collected signal (4) The cable partial discharge signal identification technology is not mature enough, lacking the identification and judgment technology of the partial discharge pulse signal waveform, frequency and amplitude measured on site; (5) The lack of XLPE cable insulation degradation Evaluate the accumulation of practical operating experience such as research on basic theories and operating status criteria.
上述各种因素的存在,大大降低了高压电缆局部放电在线检测的灵敏度、准确度、可信度。因此,如何运用现有的先进技术,最大限度抑制干扰,准确提取局放信号,更可靠、更灵敏地为后续的绝缘诊断提供信息,成为高压电缆设备局部放电在线检测中的重要方向。The existence of the above-mentioned various factors greatly reduces the sensitivity, accuracy and reliability of on-line detection of partial discharge of high-voltage cables. Therefore, how to use the existing advanced technology to suppress interference to the greatest extent, accurately extract partial discharge signals, and provide information for subsequent insulation diagnosis more reliably and sensitively has become an important direction in the on-line partial discharge detection of high-voltage cable equipment.
发明内容Contents of the invention
本发明所要解决的技术问题是:针对目前电缆设备在线检测上述问题,本发明提出一种高压电缆系统分布式局部放电在线监测方法及其装置,能够分布式的监测整条电缆线路的每个附件及附件一定范围内的本体的局部放电信号。The technical problem to be solved by the present invention is: Aiming at the above-mentioned problems of online detection of current cable equipment, the present invention proposes a distributed partial discharge online monitoring method and device for a high-voltage cable system, which can monitor each accessory of the entire cable line in a distributed manner And the partial discharge signal of the body within a certain range of accessories.
本发明所采用的技术方案是:一种高压电缆系统分布式局部放电在线监测方法,整条电缆线路每个附件处安装高频宽带电磁耦合传感器,传感器套接在电缆附件接地线或交叉互联线上来耦合局部放电信号,50Hz电流传感器套接在电缆本体上来耦合工频电流信号,下位机对传感器信号进行调理及高速采集并预处理,并通过光纤传输网络将数字信号传送至上位机监控软件,实现高压电缆设备分布式局部放电的在线监测,其特征在于,包括以下步骤:The technical scheme adopted in the present invention is: a method for on-line monitoring of distributed partial discharge in a high-voltage cable system. A high-frequency broadband electromagnetic coupling sensor is installed at each attachment of the entire cable line, and the sensor is socketed on the ground wire or cross interconnection wire of the cable attachment. The partial discharge signal is coupled up, and the 50Hz current sensor is socketed on the cable body to couple the power frequency current signal. The lower computer performs conditioning, high-speed acquisition and preprocessing of the sensor signal, and transmits the digital signal to the upper computer monitoring software through the optical fiber transmission network. Realize the on-line monitoring of the distributed partial discharge of high-voltage cable equipment, which is characterized in that it includes the following steps:
(1)在整条电缆线路每个电缆附件接地线或交叉互联线上套接高频宽带电磁耦合传感器,通过信号调理后接入高速数据采集卡的通道上,进行三相同步触发高速采样,并经FPGA电路处理后,将数字信号存储于下位机ROM中;(1) A high-frequency broadband electromagnetic coupling sensor is socketed on each cable accessory ground wire or cross interconnection wire of the entire cable line, and connected to the channel of the high-speed data acquisition card after signal conditioning to perform three-phase synchronous trigger high-speed sampling, And after being processed by the FPGA circuit, the digital signal is stored in the ROM of the lower computer;
(2)在电缆本体上套接50Hz工频电流传感器,通过信号调理后也接入高速数据采集卡的通道上进行采样,用于局部放电信号采集通道的触发,以确定局部放电信号的工频电压相位;(2) A 50Hz power frequency current sensor is socketed on the cable body, and after signal conditioning, it is also connected to the channel of the high-speed data acquisition card for sampling, which is used to trigger the partial discharge signal acquisition channel to determine the power frequency of the partial discharge signal voltage phase;
(3)下位机内包括有信号调理模块、高速数据采集卡、I/O卡,用来完成局部放电信号的初步干扰抑制、触发采集、数据存储;(3) The lower computer includes a signal conditioning module, a high-speed data acquisition card, and an I/O card, which are used to complete preliminary interference suppression, trigger acquisition, and data storage of partial discharge signals;
(4)光纤传输网络将每个下位机监测单元连接至上位机监控单元;(4) The optical fiber transmission network connects each lower computer monitoring unit to the upper computer monitoring unit;
(5)上位机监控单元完成对下位机的硬件控制,采集数据的接收、视在放电量的显示、放电量-放电相位的放电谱图显示;(5) The upper computer monitoring unit completes the hardware control of the lower computer, the reception of collected data, the display of the apparent discharge amount, and the display of the discharge spectrogram of the discharge amount-discharge phase;
(6)通过对每个附件放电量的连续监测,形成放电趋势数据库,从而掌握整条电缆线路绝缘运行状况。(6) Through the continuous monitoring of the discharge capacity of each accessory, a discharge trend database is formed, so as to grasp the insulation operation status of the entire cable line.
本发明还提供一种高压电缆系统分布式局部放电在线监测装置,包括高频宽带电磁传感器、光纤传输网络及上位机,高频宽带电磁传感器套接在三相电缆附件接地线或交叉互联线上,其特征在于,还包括下位机数据预处理采集单元,上位机通过光纤传输网络与下位机相连,下位机数据预处理采集单元进一步包括信号前置调理单元、I/O控制单元、高速数据采集卡,信号前置调理单元对高频宽带电磁传感器耦合的信号进行调理,高速数据采集卡对调理后的信号进行采集,I/O控制单元完成采集的控制,并通过光纤传输网络将采集数据传送到上位机。The present invention also provides a distributed partial discharge on-line monitoring device for a high-voltage cable system, which includes a high-frequency broadband electromagnetic sensor, an optical fiber transmission network, and a host computer. , is characterized in that it also includes a lower computer data preprocessing acquisition unit, the upper computer is connected with the lower computer through an optical fiber transmission network, and the lower computer data preprocessing acquisition unit further includes a signal preconditioning unit, an I/O control unit, and a high-speed data acquisition unit. card, the signal pre-conditioning unit conditions the signal coupled by the high-frequency broadband electromagnetic sensor, the high-speed data acquisition card collects the conditioned signal, the I/O control unit completes the control of the collection, and transmits the collected data through the optical fiber transmission network to the host computer.
本发明的有益效果是:本发明的优点在于能够根据现场需要,通过对高压电缆三相附件进行分布式的同步高速采样,实现局部放电在线监测。本装置宽频高速采集的方式可获取完整的局部放电信号波形,能够实时显示视在放电量及各种放电谱图。放电量的连续监测可实现对电缆系统绝缘状况的监控,为电缆设备的状态维修提供强有力的技术支撑。The beneficial effect of the present invention is: the advantage of the present invention is that it can realize partial discharge on-line monitoring by performing distributed synchronous high-speed sampling on high-voltage cable three-phase accessories according to site needs. The wide-band high-speed acquisition method of this device can obtain a complete partial discharge signal waveform, and can display the apparent discharge amount and various discharge spectra in real time. The continuous monitoring of the discharge can realize the monitoring of the insulation status of the cable system, and provide strong technical support for the condition maintenance of the cable equipment.
附图说明Description of drawings
图1为本发明实施例的高压电缆系统分布式局部放电在线监测方法的原理流程图。Fig. 1 is a schematic flowchart of a method for on-line distributed partial discharge monitoring of a high-voltage cable system according to an embodiment of the present invention.
图2为本发明实施例的高压电缆系统分布式局部放电在线监测装置的功能框图。Fig. 2 is a functional block diagram of a distributed partial discharge on-line monitoring device for a high-voltage cable system according to an embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图和实施例对本发明做进一步的详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
参见图1及图2所示,为本发明实施例提供的高压电缆系统分布式局部放电在线监测方法及装置的原理及功能框图。Referring to FIG. 1 and FIG. 2 , they are principle and functional block diagrams of the distributed partial discharge on-line monitoring method and device for a high-voltage cable system provided by an embodiment of the present invention.
本发明的高压电缆系统分布式局部放电在线监测装置,包括高频宽带电磁传感器、光纤传输网络及上位机,高频宽带电磁传感器套接在三相电缆附件接地线或交叉互联线上,其特征在于,还包括下位机数据预处理采集单元,上位机通过光纤传输网络与下位机相连,下位机数据预处理采集单元进一步包括信号前置调理单元、I/O控制单元、高速数据采集卡,信号前置调理单元对高频宽带电磁传感器耦合的信号进行调理,高速数据采集卡对调理后的信号进行采集,I/O控制单元完成采集的控制,并通过光纤传输网络将采集数据传送到上位机。The distributed partial discharge on-line monitoring device of the high-voltage cable system of the present invention includes a high-frequency broadband electromagnetic sensor, an optical fiber transmission network and a host computer. That is, it also includes a lower computer data preprocessing acquisition unit, the upper computer is connected with the lower computer through an optical fiber transmission network, and the lower computer data preprocessing acquisition unit further includes a signal pre-conditioning unit, an I/O control unit, a high-speed data acquisition card, and a signal The pre-conditioning unit regulates the signal coupled by the high-frequency broadband electromagnetic sensor, the high-speed data acquisition card collects the conditioned signal, the I/O control unit completes the control of the collection, and transmits the collected data to the host computer through the optical fiber transmission network .
高频宽带电磁传感器安装于电缆附件接地线或交叉互联线上来耦合局部放电信号,50Hz工频电压传感器安装于附件附近的本体上来耦合工频电流信号;局部放电信号前置调理单元完成接地线上混杂信号的预处理,将信号调理至高速数据采集卡输入范围内进行高速数据采集,并将采集数据存储到大容量的ROM中;光纤传输网络用于将下位机采集数据高速传输至上位机监控软件;上位机对信号调理采集单元进行控制,接收采集数据后进行软件抗干扰处理,显示放电视在放电量,以及q-φ等放电谱图。The high-frequency broadband electromagnetic sensor is installed on the grounding wire of the cable accessory or the cross interconnection line to couple the partial discharge signal, and the 50Hz power frequency voltage sensor is installed on the body near the accessory to couple the power frequency current signal; the partial discharge signal pre-conditioning unit completes the grounding line Preprocessing of mixed signals, conditioning the signal to the input range of the high-speed data acquisition card for high-speed data acquisition, and storing the collected data in a large-capacity ROM; the optical fiber transmission network is used to transmit the data collected by the lower computer to the upper computer for monitoring at high speed Software; the host computer controls the signal conditioning and acquisition unit, and performs software anti-interference processing after receiving the collected data, and displays the discharge amount of the TV and the discharge spectrum such as q-φ.
下面对所述装置的主要部件进行逐一说明:The main components of the device are described one by one below:
(一)高频宽带电磁耦合传感器(1) High-frequency broadband electromagnetic coupling sensor
高频宽带信号传感器采用镍锌铁氧体,频率范围为20kHz-20MHz,测量时套接在三相附件接地线或交叉互联线上组成传感器对,耦合的信号包括局部放电信号、干扰、背景噪声。The high-frequency broadband signal sensor adopts nickel-zinc ferrite, and the frequency range is 20kHz-20MHz. When measuring, it is connected to the three-phase accessory ground wire or cross interconnection wire to form a sensor pair. The coupled signals include partial discharge signals, interference, and background noise. .
50Hz工频信号传感器用于耦合电缆本体的工频电流信号,用作触发采集,并确定放电信号所在的工频相位。The 50Hz power frequency signal sensor is used to couple the power frequency current signal of the cable body to trigger acquisition and determine the power frequency phase of the discharge signal.
(二)下位机数据预处理采集单元(2) Lower computer data preprocessing acquisition unit
下位机单元安装在传感器附近,对传感器输出的信号进行硬件滤除部分干扰,使得后续放大单元对局部放电信号进行放大,以提高检测灵敏度。The lower computer unit is installed near the sensor, and performs hardware filtering on the signal output by the sensor to partially interfere, so that the subsequent amplifying unit can amplify the partial discharge signal to improve the detection sensitivity.
程控信号放大单元具有1、5、10、20、50、100倍的放大倍数,将信号调理至数据采集卡最佳的输入范围。The program-controlled signal amplification unit has 1, 5, 10, 20, 50, 100 times of amplification, and adjusts the signal to the best input range of the data acquisition card.
所采用的数据采集卡最高采样率为60MS/s,模拟带宽为30MHz,A/D分辨率为12位,高速采集的信号存储到ROM中。The highest sampling rate of the data acquisition card used is 60MS/s, the analog bandwidth is 30MHz, the A/D resolution is 12 bits, and the high-speed collected signals are stored in ROM.
I/O控制卡用来上下位机间控制命令的发送接收。The I/O control card is used to send and receive control commands between the upper and lower computers.
(三)光纤传输网络(3) Optical fiber transmission network
采用带钢凯套光纤,其中一根作为备用。每根光纤16芯,在每个节点的光纤集线器中将光纤截断熔接并引出一路光纤连接至一个下位机单元。Use strip steel Kay sleeve optical fiber, one of which is used as a spare. Each fiber has 16 cores, and the fiber is cut and fused in the fiber hub of each node, and a fiber is led out to connect to a lower computer unit.
(四)上位机监控软件(4) PC monitoring software
上位机软件用于控制下位机数据采集、设置程控信号调理单元、以及控制接收下位机ROM中存储的采集数据。The upper computer software is used to control the data acquisition of the lower computer, set the program-controlled signal conditioning unit, and control the reception of the collected data stored in the ROM of the lower computer.
对各相同步信号进行综合抗干扰处理后,上位机软件提取出局部放电信号,显示局部放电视在放电量,以及q-φ等放电谱图。After the comprehensive anti-interference processing is carried out on the synchronous signals of each phase, the upper computer software extracts the partial discharge signal, displays the discharge amount of the partial discharge TV, and the discharge spectrum such as q-φ.
本发明的高压电缆系统分布式局部放电在线监测方法,整条电缆线路每个附件处安装高频宽带电磁耦合传感器,传感器套接在电缆附件接地线或交叉互联线上来耦合局部放电信号,50Hz电流传感器套接在电缆本体上来耦合工频电流信号;下位机对传感器信号进行调理及高速采集并预处理,并通过光纤传输网络将数字信号传送至上位机监控软件,实现高压电缆设备分布式局部放电的在线监测。包括以下步骤:In the distributed partial discharge on-line monitoring method of the high-voltage cable system of the present invention, a high-frequency broadband electromagnetic coupling sensor is installed at each attachment of the entire cable line, and the sensor is sleeved on the cable attachment ground wire or cross interconnection wire to couple the partial discharge signal, and the 50Hz current The sensor is socketed on the cable body to couple the power frequency current signal; the lower computer performs conditioning, high-speed acquisition and preprocessing of the sensor signal, and transmits the digital signal to the upper computer monitoring software through the optical fiber transmission network to realize distributed partial discharge of high-voltage cable equipment online monitoring. Include the following steps:
(1)在整条电缆线路每个电缆附件接地线或交叉互联线上套接高频宽带电磁耦合传感器,通过信号调理后接入高速数据采集卡的通道上,进行三相同步触发高速采样,并经FPGA(现场可编程门阵列)电路处理后,将数字信号存储于下位机ROM(内存)中。(1) A high-frequency broadband electromagnetic coupling sensor is socketed on each cable accessory ground wire or cross interconnection wire of the entire cable line, and connected to the channel of the high-speed data acquisition card after signal conditioning to perform three-phase synchronous trigger high-speed sampling, And after being processed by the FPGA (Field Programmable Gate Array) circuit, the digital signal is stored in the ROM (memory) of the lower computer.
(2)在电缆本体上套接50Hz工频电流传感器,通过信号调理后也接入高速数据采集卡的通道上进行采样,用于局部放电信号采集通道的触发,以确定局部放电信号的工频电压相位。(2) A 50Hz power frequency current sensor is socketed on the cable body, and after signal conditioning, it is also connected to the channel of the high-speed data acquisition card for sampling, which is used to trigger the partial discharge signal acquisition channel to determine the power frequency of the partial discharge signal voltage phase.
(3)下位机内包括有信号调理模块、高速数据采集卡、I/O卡,用来完成局部放电信号的初步干扰抑制、触发采集、数据存储。(3) The lower computer includes a signal conditioning module, a high-speed data acquisition card, and an I/O card, which are used to complete preliminary interference suppression, trigger acquisition, and data storage of partial discharge signals.
(4)光纤传输网络将每个下位机监测单元连接至上位机监控单元。(4) The optical fiber transmission network connects each monitoring unit of the lower computer to the monitoring unit of the upper computer.
(5)上位机监控单元完成对下位机的硬件控制,采集数据的接收、视在放电量的显示、q-φ(放电量-放电相位)等放电谱图显示。(5) The monitoring unit of the upper computer completes the hardware control of the lower computer, the reception of collected data, the display of the apparent discharge amount, and the display of discharge spectrograms such as q-φ (discharge amount-discharge phase).
(6)通过对每个附件放电量的连续监测,形成放电趋势数据库,从而掌握整条电缆线路绝缘运行状况。(6) Through the continuous monitoring of the discharge capacity of each accessory, a discharge trend database is formed, so as to grasp the insulation operation status of the entire cable line.
整条电缆线路的分布式的局部放电在线监测,可对绝缘劣化进行前期预报和评估,积极有效地预防电缆系统突发运行故障。The distributed partial discharge on-line monitoring of the entire cable line can carry out early prediction and evaluation of insulation degradation, and actively and effectively prevent sudden operation failures of the cable system.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2718593Y (en) * | 2004-05-17 | 2005-08-17 | 西安交通大学 | Electric cable local discharge on-line monitoring apparatus |
CN101650406A (en) * | 2009-09-18 | 2010-02-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Local discharge on-line detection method and device of high-voltage cross-linking polythene cable system |
CN101655538A (en) * | 2009-09-27 | 2010-02-24 | 西安博源电气有限公司 | Generator local discharge on-line monitoring device and monitoring method thereof |
CN202003200U (en) * | 2010-11-30 | 2011-10-05 | 国网电力科学研究院 | Distributed partial discharge on-line monitoring device of high-pressure cable system |
-
2010
- 2010-11-30 CN CN2010105664744A patent/CN102116824A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2718593Y (en) * | 2004-05-17 | 2005-08-17 | 西安交通大学 | Electric cable local discharge on-line monitoring apparatus |
CN101650406A (en) * | 2009-09-18 | 2010-02-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Local discharge on-line detection method and device of high-voltage cross-linking polythene cable system |
CN101655538A (en) * | 2009-09-27 | 2010-02-24 | 西安博源电气有限公司 | Generator local discharge on-line monitoring device and monitoring method thereof |
CN202003200U (en) * | 2010-11-30 | 2011-10-05 | 国网电力科学研究院 | Distributed partial discharge on-line monitoring device of high-pressure cable system |
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