技术领域technical field
本实用新型属于电力技术领域，尤其是涉及一种基于网络分析仪的电容分压器宽频阻抗测量系统。The utility model belongs to the technical field of electric power, in particular to a wide-frequency impedance measurement system of a capacitive voltage divider based on a network analyzer.
背景技术Background technique
近年来，基于网络分析仪测量并采用黑箱理论的建模方法已成为电力设备宽频建模的重要技术手段，采用该方法所建模型的精度和可靠性越来越高。网络分析仪是一种新型仪器，能够直接以扫频的方式测量有源、无源、可逆、不可逆的单端口和二端口的散射参数和阻抗参数。随着特高压电网的快速发展，柱式特高压电容分压器也在电网中得到了很广泛的应用，精确的分压特性是柱式特高压电容分压器所必备的特性。柱式特高压电容分压器单体高度高达十几米，测量时需要很长的测量引线，这就会带来很大的误差。由于频率会对柱式特高压电容分压器的误差特性产生影响，所以需要针对其误差制定误差修正措施。为了分析在不同频率下柱式特高压电容分压器的分压特性及分压误差，需要对柱式特高压电容分压器建立宽频等效电路模型。因此，针对柱式特高压电容分压器进行阻抗测量具有重要的实际意义。In recent years, the modeling method based on network analyzer measurement and black box theory has become an important technical means for broadband modeling of power equipment, and the accuracy and reliability of the model built by this method are getting higher and higher. The network analyzer is a new type of instrument that can directly measure active, passive, reversible, irreversible one-port and two-port scattering parameters and impedance parameters in a frequency sweeping manner. With the rapid development of the UHV power grid, column-type UHV capacitive voltage dividers have also been widely used in the power grid. Accurate voltage division characteristics are necessary characteristics of column-type UHV capacitor voltage dividers. The height of a column-type UHV capacitive divider is as high as more than ten meters, and the measurement requires a long measurement lead, which will cause a large error. Since the frequency will affect the error characteristics of the column-type UHV capacitive voltage divider, it is necessary to formulate error correction measures for its error. In order to analyze the voltage-dividing characteristics and voltage-dividing errors of the column-type UHV capacitive voltage divider at different frequencies, it is necessary to establish a broadband equivalent circuit model for the column-type UHV capacitor voltage divider. Therefore, it is of great practical significance to measure the impedance of the column UHV capacitive divider.
实用新型内容Utility model content
为了解决目前特高压电容分压器因尺寸大而难以直接测量的不足，本实用新型提出了一种基于网络分析仪的电容分压器宽频阻抗测量系统，其特征在于，该宽频阻抗测量系统包括网络分析仪1、试品2、阻抗测试夹具3、测量引线4、数据传输设备5、数据存储设备6、对地绝缘装置7；其中，网络分析仪1与阻抗测试夹具3连接；阻抗测试夹具3的输入端接至网络分析仪1的接线口，阻抗测试夹具3的输出端通过测量引线4接至试品2的两端；试品2底部与地面之间采用对地绝缘装置7隔离；网络分析仪1的输出端接至数据传输设备5的输入端；数据传输设备5的输出端接至数据存储设备6的输入端。In order to solve the problem that the current UHV capacitor voltage divider is difficult to measure directly due to its large size, the utility model proposes a broadband impedance measurement system for a capacitor voltage divider based on a network analyzer, which is characterized in that the broadband impedance measurement system includes Network analyzer 1, sample 2, impedance test fixture 3, measurement lead 4, data transmission device 5, data storage device 6, ground insulation device 7; wherein, network analyzer 1 is connected to impedance test fixture 3; impedance test fixture The input terminal of 3 is connected to the connection port of network analyzer 1, and the output terminal of impedance test fixture 3 is connected to both ends of test product 2 through measurement lead 4; the bottom of test product 2 is isolated from the ground by ground insulation device 7; The output terminal of the network analyzer 1 is connected to the input terminal of the data transmission device 5 ; the output terminal of the data transmission device 5 is connected to the input terminal of the data storage device 6 .
所述网络分析仪1采用安捷伦4395A型网络分析仪，工作频率范围为100kHz-500MHz。The network analyzer 1 is an Agilent 4395A network analyzer with a working frequency range of 100kHz-500MHz.
所述试品2为特高压电容分压器。The sample 2 is a UHV capacitive voltage divider.
所述阻抗测试夹具3为安捷伦43961A型。The impedance test fixture 3 is Agilent 43961A type.
所述测量引线4采用软铜绞线，外径为3mm。The measurement lead 4 is an annealed copper stranded wire with an outer diameter of 3 mm.
所述数据传输设备5为安捷伦GPIB转换器，型号为82357B。The data transmission device 5 is an Agilent GPIB converter, model 82357B.
所述数据存储设备6为电脑，采用EXCEL软件获取、记录并存储数据。The data storage device 6 is a computer, which uses EXCEL software to acquire, record and store data.
所述对地绝缘装置采用1cm厚的橡胶垫。The ground insulation device adopts a 1cm thick rubber pad.
本实用新型的有益效果在于，提出一种基于网络分析仪的电容分压器宽频阻抗测量系统，采用网络分析仪结合阻抗测试夹具测量试品的宽频阻抗参数，通过数据传输设备将测得的阻抗参数传输至电脑，利用电脑中安捷伦4395A读取数据专用软件获取并存储网络分析仪测量到的阻抗参数，并且还能够直接自动绘制出阻抗参数简图，便于测量人员直接观察以判断试品在宽频情况下的阻抗特性。The beneficial effect of the utility model is that a network analyzer-based capacitive voltage divider broadband impedance measurement system is proposed. The network analyzer is used in combination with the impedance test fixture to measure the broadband impedance parameters of the sample, and the measured impedance is transmitted through the data transmission equipment. The parameters are transmitted to the computer, and the impedance parameters measured by the network analyzer can be obtained and stored by using the Agilent 4395A special software for reading data in the computer, and can also directly and automatically draw a simplified diagram of the impedance parameters, which is convenient for the measurement personnel to directly observe to judge whether the test product is in the broadband The impedance characteristics of the case.
附图说明Description of drawings
图1为本实用新型的接线示意图；Fig. 1 is the wiring diagram of the present utility model;
图中标号：Labels in the figure:
1-网络分析仪、2-试品、3-阻抗测试夹具、4-测量引线、5-数据传输设备、6-数据存储设备、7-对地绝缘装置。1-network analyzer, 2-test object, 3-impedance test fixture, 4-measurement lead, 5-data transmission equipment, 6-data storage equipment, 7-ground insulation device.
具体实施方式Detailed ways
本实用新型提出一种基于网络分析仪的电容分压器宽频阻抗测量系统，下面结合附图和具体实施例对本实用新型作详细说明。The utility model proposes a capacitive voltage divider broadband impedance measurement system based on a network analyzer. The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1所示为基于网络分析仪的电容分压器宽频阻抗测量系统接线示意图，该宽频阻抗测量系统包括网络分析仪1、试品2、阻抗测试夹具3、测量引线4、数据传输设备5、数据存储设备6、对地绝缘装置7；其中，网络分析仪1与阻抗测试夹具3连接；阻抗测试夹具3的输入端接至网络分析仪1的接线口，阻抗测试夹具3的输出端通过测量引线4接至试品2的两端；试品2底部与地面之间采用对地绝缘装置7隔离；网络分析仪1的输出端接至数据传输设备5的输入端；数据传输设备5的输出端接至数据存储设备6的输入端。Figure 1 is a schematic diagram of the wiring of a capacitive voltage divider broadband impedance measurement system based on a network analyzer. The broadband impedance measurement system includes a network analyzer 1, a sample 2, an impedance test fixture 3, a measurement lead 4, and a data transmission device 5. Data storage device 6, ground insulation device 7; Wherein, network analyzer 1 is connected with impedance test fixture 3; The input terminal of impedance test fixture 3 is connected to the wiring port of network analyzer 1, and the output end of impedance test fixture 3 passes through the measurement The lead wire 4 is connected to both ends of the test object 2; the bottom of the test object 2 is isolated from the ground by a ground insulation device 7; the output terminal of the network analyzer 1 is connected to the input terminal of the data transmission device 5; the output terminal of the data transmission device 5 Terminated to the input of the data storage device 6.
其中，将柱式特高压电容分压器拆解为多个单节的电容器，将单节的电容器作为试品2垂直地面竖立，底部与地面之间采用对地绝缘装置7隔离。将网络分析仪1接上阻抗测试夹具3，利用50欧姆的标准电阻进行校准。网络分析仪1校准之后，采用测量引线4连接试品2与网络分析仪1，在所设定的频域内测量单节电容器的宽频阻抗。通过数据传输设备5将数据传输至计算机，用计算机中的EXCEL软件获取并存储测量到的阻抗参数，以及绘制出阻抗参数简图，便于直接观察。Among them, the column-type UHV capacitive voltage divider is disassembled into multiple single-section capacitors, and the single-section capacitor is used as the test sample 2 to stand vertically on the ground, and the ground insulation device 7 is used to isolate the bottom from the ground. Connect the network analyzer 1 to the impedance test fixture 3, and use a standard resistance of 50 ohms for calibration. After the network analyzer 1 is calibrated, use the measurement lead 4 to connect the test product 2 and the network analyzer 1, and measure the broadband impedance of a single capacitor in the set frequency domain. The data is transmitted to the computer through the data transmission device 5, and the measured impedance parameters are acquired and stored by the EXCEL software in the computer, and a simplified diagram of the impedance parameters is drawn for direct observation.
其中，由于测量的是宽频参数，为了尽量减小在高频段时的频变效应，需要尽量减少不必要的测量辅助装置，尤其是测量引线4需要优化其空间布置，测量引线4应避免与除试品2和网络分析仪1之外的其他一切设备接触，并尽可能减短测量引线4的长度，并且测量引线4与试品2的电气连接应该牢固、可靠、充分，以达到减小接触阻抗的目的。Among them, since the measurement is a broadband parameter, in order to minimize the frequency variation effect in the high frequency band, it is necessary to reduce unnecessary measurement auxiliary devices as much as possible, especially the measurement lead 4 needs to optimize its spatial layout, and the measurement lead 4 should be avoided. The test object 2 is in contact with all other equipment except the network analyzer 1, and the length of the measurement lead 4 should be shortened as much as possible, and the electrical connection between the measurement lead 4 and the test object 2 should be firm, reliable and sufficient to reduce contact purpose of resistance.
其中，通过网络分析仪1对被测试品2在所需要的频域内进行扫频测量，测量频点线性分布抑或是对数分布，线性分布主要应用于测量窄频域的情况，而对数分布主要应用于测量宽频域的情况。利用数据传输设备5和数据存储设备6采集试品2的阻抗参数，每测量一次都需要将测量到的阻抗参数以幅值和相位的形式通过数据传输设备5传输到数据存储设备6，然后进行收集存储，通过数据存储设备6中的EXCEL办公软件能够直接读取数据，并绘制阻抗参数简图，将测量结果呈现出来。Among them, the network analyzer 1 performs frequency sweep measurement on the tested product 2 in the required frequency domain, and the measurement frequency points are linearly distributed or logarithmic. The linear distribution is mainly used in the case of measuring narrow frequency domains, while the logarithmic distribution It is mainly used in the measurement of wide frequency domain. Utilize the data transmission device 5 and the data storage device 6 to collect the impedance parameters of the sample 2, and each measurement needs to transmit the measured impedance parameters to the data storage device 6 through the data transmission device 5 in the form of amplitude and phase, and then carry out The data is collected and stored, and the data can be directly read through the EXCEL office software in the data storage device 6, and a simplified diagram of impedance parameters is drawn to present the measurement results.
以上所述，仅为本实用新型较佳的具体实施方式，但本实用新型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实用新型揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本实用新型的保护范围之内。因此，本实用新型的保护范围应该以权力要求的保护范围为准。The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520141187.7UCN204439721U (en) | 2015-03-12 | 2015-03-12 | A kind of capacitive divider wideband impedance measurement system of Excavation Cluster Based on Network Analysis instrument |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520141187.7UCN204439721U (en) | 2015-03-12 | 2015-03-12 | A kind of capacitive divider wideband impedance measurement system of Excavation Cluster Based on Network Analysis instrument |
| Publication Number | Publication Date |
|---|---|
| CN204439721Utrue CN204439721U (en) | 2015-07-01 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201520141187.7UExpired - Fee RelatedCN204439721U (en) | 2015-03-12 | 2015-03-12 | A kind of capacitive divider wideband impedance measurement system of Excavation Cluster Based on Network Analysis instrument |
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| CN106526324A (en)* | 2016-11-09 | 2017-03-22 | 南方电网科学研究院有限责任公司 | Impedance characteristic testing device of capacitive equipment |
| CN106645954A (en)* | 2015-11-03 | 2017-05-10 | 沈阳拓荆科技有限公司 | Heating plate impedance measuring tool and heating plate impedance measuring method |
| CN113281614A (en)* | 2021-05-18 | 2021-08-20 | 国网江苏省电力有限公司无锡供电分公司 | Power cable broadband impedance spectrum testing method |
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| CN106645954A (en)* | 2015-11-03 | 2017-05-10 | 沈阳拓荆科技有限公司 | Heating plate impedance measuring tool and heating plate impedance measuring method |
| WO2017075859A1 (en)* | 2015-11-03 | 2017-05-11 | 沈阳拓荆科技有限公司 | Instrument for measuring impedance of heating disk and measurement method thereof |
| CN106645954B (en)* | 2015-11-03 | 2019-02-01 | 沈阳拓荆科技有限公司 | Heating dish impedance measurement tooling and measurement method |
| CN106526324A (en)* | 2016-11-09 | 2017-03-22 | 南方电网科学研究院有限责任公司 | Impedance characteristic testing device of capacitive equipment |
| CN106526324B (en)* | 2016-11-09 | 2019-03-19 | 南方电网科学研究院有限责任公司 | Impedance characteristic testing device of capacitive equipment |
| CN113281614A (en)* | 2021-05-18 | 2021-08-20 | 国网江苏省电力有限公司无锡供电分公司 | Power cable broadband impedance spectrum testing method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20150701 Termination date:20160312 |