CN108061845B - GIS partial discharge data acquisition device - Google Patents
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Abstract
本发明公开了一种GIS局部放电数据采集装置，包括机箱外壳，安装于机箱外壳内的通道调理模块、数据采集模块、数据传输模块以及供电模块；其中，供电模块分别和通道调理模块、数据采集模块、数据传输模块相连接，以为通道调理模块、数据采集模块、数据传输模块提供工作电压；本GIS局部放电数据采集装置综合应用了计算机技术，模拟电子技术、高速信号采集和抗干扰技术。装置能够采集GIS的特高频局部放电信号，分析信号并将处理后的特高频局部放电模拟信号转换成数字信号，最后采用标准协议，通过TCP/IP以太网向后台传输。
The present invention discloses a GIS partial discharge data acquisition device, comprising a chassis shell, a channel conditioning module, a data acquisition module, a data transmission module and a power supply module installed in the chassis shell; wherein the power supply module is respectively connected to the channel conditioning module, the data acquisition module and the data transmission module to provide working voltage for the channel conditioning module, the data acquisition module and the data transmission module; the GIS partial discharge data acquisition device comprehensively applies computer technology, analog electronic technology, high-speed signal acquisition and anti-interference technology. The device can collect the ultra-high frequency partial discharge signal of GIS, analyze the signal and convert the processed ultra-high frequency partial discharge analog signal into a digital signal, and finally adopt the standard protocol to transmit it to the background through TCP/IP Ethernet.
Description
技术领域Technical field
本发明涉及电力设备，具体涉及一种GIS局部放电数据采集装置。The invention relates to electric power equipment, and in particular to a GIS partial discharge data collection device.
背景技术Background technique
随着我国电力工业的发展，GIS的应用日渐增多。由于受现场条件的限制，环境温度、湿度和空气的洁净度、安装工器具的精度、安装工艺水平都很难有效控制，现场安装时灰尘颗粒或其它异物极易进入母线筒，导体极易造成损伤，这些缺陷在运行电压下产生局部放电，发展到一定程度造成绝缘损坏甚至闪络。通过分析局部放电检测数据，能够发现GIS内部存在的安全隐患，保证电网的安全运行。针对以上情况，研制一种GIS局部放电数据采集装置十分必要。With the development of my country's electric power industry, the application of GIS is increasing day by day. Due to the limitations of on-site conditions, it is difficult to effectively control the ambient temperature, humidity and air cleanliness, the accuracy of installation tools, and the level of installation technology. Dust particles or other foreign matter can easily enter the busbar barrel during on-site installation, and conductors can easily cause damage. Damage, these defects produce partial discharge under operating voltage, which may develop to a certain extent and cause insulation damage or even flashover. By analyzing partial discharge detection data, potential safety hazards within the GIS can be discovered to ensure the safe operation of the power grid. In view of the above situation, it is very necessary to develop a GIS partial discharge data collection device.
发明内容Contents of the invention
本发明的目的在于克服上述现有技术的不足，提供一种GIS局部放电数据采集装置，以及时准确地采集并传输GIS局部放电数据。The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a GIS partial discharge data collection device to collect and transmit GIS partial discharge data timely and accurately.
为实现上述目的，本发明的技术方案是：In order to achieve the above objects, the technical solution of the present invention is:
一种GIS局部放电数据采集装置，包括机箱外壳，安装于机箱外壳内的通道调理模块、数据采集模块、数据传输模块以及供电模块；其中，A GIS partial discharge data acquisition device, including a chassis casing, a channel conditioning module, a data acquisition module, a data transmission module and a power supply module installed in the chassis casing; wherein,
供电模块分别和通道调理模块、数据采集模块、数据传输模块相连接，以为通道调理模块、数据采集模块、数据传输模块提供工作电压；The power supply module is connected to the channel conditioning module, data acquisition module, and data transmission module respectively to provide working voltage for the channel conditioning module, data acquisition module, and data transmission module;
通道调理模块包括结构相同的GIS内部局部放电信号通道调理单元和外部电晕干扰信号通道调理单元；GIS内部局部放电信号通道调理单元用于接收GIS内部局部放电信号并对GIS内部局部放电信号进行滤波、放大，滤波、放大后的GIS内部局部放电信号传输至数据采集模块；外部电晕干扰信号通道调理单元用于接收影响GIS局部放电测量的外部电晕干扰信号并对外部电晕干扰信号进行滤波、放大，滤波、放大后的外部电晕干扰信号传输至数据采集模块；The channel conditioning module includes a GIS internal partial discharge signal channel conditioning unit and an external corona interference signal channel conditioning unit with the same structure; the GIS internal partial discharge signal channel conditioning unit is used to receive the GIS internal partial discharge signal and filter the GIS internal partial discharge signal. , amplify, filter, and amplify the internal partial discharge signal of the GIS and transmit it to the data acquisition module; the external corona interference signal channel conditioning unit is used to receive the external corona interference signal that affects the GIS partial discharge measurement and filter the external corona interference signal. , amplify, filter, and amplify the external corona interference signal and transmit it to the data acquisition module;
数据采集模块包括干扰消除单元、AD转换器以及数字信号输出端；其中，干扰消除单元用于接收滤波、放大后的GIS内部局部放电信号和滤波、放大后的外部电晕干扰信号，并利用滤波、放大后的外部电晕干扰信号将滤波、放大后的GIS内部局部放电信号所包含的外部电晕干扰信号消除；AD转换器用于将消除外部电晕干扰信号后的GIS内部局部放电信号转换为数字信号，转换后的数字信号由数字信号输出端输出至数据传输模块；The data acquisition module includes an interference elimination unit, an AD converter and a digital signal output terminal; among them, the interference elimination unit is used to receive the filtered and amplified GIS internal partial discharge signal and the filtered and amplified external corona interference signal, and use the filtered , the amplified external corona interference signal eliminates the external corona interference signal contained in the filtered and amplified GIS internal partial discharge signal; the AD converter is used to convert the GIS internal partial discharge signal after eliminating the external corona interference signal into Digital signal, the converted digital signal is output from the digital signal output terminal to the data transmission module;
数据传输模块用于将其所接收的数字信号传输至后台数据分析系统。The data transmission module is used to transmit the digital signals it receives to the background data analysis system.
所述GIS内部局部放电信号通道调理单元设置有三个，外部电晕干扰信号通道调理单元设置有一个。The GIS is provided with three internal partial discharge signal channel conditioning units and one external corona interference signal channel conditioning unit.
所述GIS内部局部放电信号通道调理单和外部电晕干扰信号通道调理单元的放大倍数为10000倍，滤波频带为100MHz-3000MHz。The amplification factor of the GIS internal partial discharge signal channel conditioning unit and the external corona interference signal channel conditioning unit is 10,000 times, and the filtering frequency band is 100MHz-3000MHz.
所述GIS内部局部放电信号通道调理单和外部电晕干扰信号通道调理单元均包括电容C4、C6、C9，电阻R5、R7、R3、R4、R16、R100、R10以及第一放大器和第二放大器；其中，电容C4的输入端为信号输入端，输出端分别和电阻R5和R7的一端以及第一放大器的正极相连接，电阻R7的另一端接地；电阻R3的一端接地，另一端和第一放大器的负极以及电阻R4的一端相连接，第一放大器的输出端分别和电容C6的一端以及电阻R4的另一端相连接，电容C6的另一端和电阻R16的一端相连接，电阻R16的另一端和电容C9的一端、电阻R100的一端以及第二放大器的正极相连接，电容C9的另一端以及电阻R100的另一端分别接地，第二放大器的负极和电阻R10的一端相连接，电阻R10的另一端接地。The GIS internal partial discharge signal channel conditioning unit and the external corona interference signal channel conditioning unit include capacitors C4, C6, C9, resistors R5, R7, R3, R4, R16, R100, R10, and first and second amplifiers ; Among them, the input end of the capacitor C4 is the signal input end, the output end is connected to one end of the resistors R5 and R7 and the positive electrode of the first amplifier respectively, the other end of the resistor R7 is grounded; one end of the resistor R3 is grounded, and the other end is connected to the first amplifier. The negative electrode of the amplifier is connected to one end of the resistor R4, the output end of the first amplifier is connected to one end of the capacitor C6 and the other end of the resistor R4, the other end of the capacitor C6 is connected to one end of the resistor R16, and the other end of the resistor R16 One end of the capacitor C9, one end of the resistor R100 and the positive electrode of the second amplifier are connected. The other end of the capacitor C9 and the other end of the resistor R100 are connected to ground respectively. The negative electrode of the second amplifier is connected to one end of the resistor R10. The other end of the resistor R10 One end is grounded.
所述电容C4、C6、C9均采用无感电容，电阻R5、R7、R3、R4、R16、R100、R10均采用绕行电阻，第一放大器和第二放大器。The capacitors C4, C6 and C9 are all non-inductive capacitors, the resistors R5, R7, R3, R4, R16, R100 and R10 are all winding resistors, the first amplifier and the second amplifier.
所述数据传输模块采用标准协议，通过TCP/IP以太网将数字信号输至后台数据分析系统。The data transmission module uses standard protocols to transmit digital signals to the background data analysis system through TCP/IP Ethernet.
所述机箱外壳采用铝合金材质。The chassis shell is made of aluminum alloy.
所述数据传输模块采用以太网数据传输芯片，传输速率为1000MHz。The data transmission module adopts an Ethernet data transmission chip with a transmission rate of 1000 MHz.
本发明与现有技术相比，其有益效果在于：Compared with the prior art, the beneficial effects of the present invention are:
通过使用本实施例提供的GIS局部放电数据采集装置能够实时、准确地采集GIS局部放电数据，并实时地将数据传输至后台数据分析系统中，通过分析GIS局部放电检测数据，能够发现GIS内部存在的安全隐患，保证电网的安全运行。By using the GIS partial discharge data collection device provided by this embodiment, the GIS partial discharge data can be collected accurately and in real time, and the data can be transmitted to the background data analysis system in real time. By analyzing the GIS partial discharge detection data, it is possible to discover the existence of internal GIS potential safety hazards to ensure the safe operation of the power grid.
附图说明Description of drawings
图1为本发明实施例提供的GIS局部放电数据采集装置的工作原理图；FIG1 is a working principle diagram of a GIS partial discharge data acquisition device provided by an embodiment of the present invention;
图2为数据采集模块的工作原理图；Figure 2 shows the working principle diagram of the data acquisition module;
图3为通道调理模块的电路原理图。Figure 3 is the circuit schematic diagram of the channel conditioning module.
具体实施方式Detailed ways
下面结合附图和具体实施方式对本发明的内容做进一步详细说明。The content of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
实施例：Example:
参阅图1所示，为本实施例提供的GIS局部放电数据采集装置的工作原理图，该装置包括机箱外壳，安装于机箱外壳内的通道调理模块、数据采集模块、数据传输模块以及供电模块。供电模块分别和通道调理模块、数据采集模块、数据传输模块相连接，供电模块通过POE端口获得12V电压，帮将12V电压转变成±5V电压提供给通道调理单元、数据采集模块、数据传输模块。Refer to Figure 1, which is a working principle diagram of the GIS partial discharge data collection device provided in this embodiment. The device includes a chassis shell, a channel conditioning module, a data acquisition module, a data transmission module and a power supply module installed in the chassis shell. The power supply module is connected to the channel conditioning module, data acquisition module, and data transmission module respectively. The power supply module obtains 12V voltage through the POE port and converts the 12V voltage into ±5V voltage to provide to the channel conditioning unit, data acquisition module, and data transmission module.
其中，该通道调理模块包括结构相同的GIS内部局部放电信号通道调理单元和外部电晕干扰信号通道调理单元。该GIS内部局部放电信号通道调理单元用于接收GIS内部特高频信号，特高频信号频率范围是100MHz-2000MHz,局部放电信号并对GIS内部特高频局部放电信号进行滤波、放大,通过滤波放大使局部放电信号消除干扰信号，提高信噪比，滤波、放大后的GIS内部特高频局部放电信号传输至数据采集模块；外部电晕干扰信号通道调理单元用于接收影响GIS局部放电测量的外部电晕干扰信号，并对外部电晕干扰信号进行滤波、放大，滤波、放大后的外部电晕干扰信号传输至数据采集模块。Among them, the channel conditioning module includes a GIS internal partial discharge signal channel conditioning unit and an external corona interference signal channel conditioning unit with the same structure. The GIS internal partial discharge signal channel conditioning unit is used to receive the GIS internal UHF signal. The frequency range of the UHF signal is 100MHz-2000MHz. The partial discharge signal is filtered and amplified by the filtering. Amplify the partial discharge signal to eliminate interference signals and improve the signal-to-noise ratio. The filtered and amplified UHF partial discharge signal inside the GIS is transmitted to the data acquisition module; the external corona interference signal channel conditioning unit is used to receive signals that affect the GIS partial discharge measurement. The external corona interference signal is filtered and amplified, and the filtered and amplified external corona interference signal is transmitted to the data acquisition module.
如图2所示，该数据采集模块包括干扰消除单元、AD转换器以及数字信号输出端。其中，干扰消除单元用于接收滤波、放大后的GIS内部特高频局部放电信号和滤波、放大后的外部电晕干扰信号，并利用滤波、放大后的外部电晕干扰信号将滤波、放大后的GIS内部特高频局部放电信号所包含的外部电晕干扰信号消除，也就是说，干扰消除单元通过接收采集GIS内部特高频局部放电信号和外部电晕干扰信号，采用Q-φ统计图进行诊断，Q-φ统计图是描述一段时间内幅值与相位的关系，一般情况下x轴表示相位，y轴表示信号的幅值。图谱将一个工频周期(360°)等分为若干个相位窗,每个相位窗内的最大放电量Vs为放电最大幅值，瞬时放电最大值Vs为第S个检测周期在相位窗放电量。将Vs视为相位(φ)函数,并以柱状图表示,可以做出Q-φ统计图。Q-φ统计图反映的是最大放电幅值随相位分布的特征。利用Q-φ统计图关系，将GIS内部特高频局部放电信号内部放的外部电晕干扰信号消除，从而可以保证数据采集的准确性；而AD转换器用于将消除外部电晕干扰信号后的GIS内部局部放电信号转换为数字信号，转换后的数字信号由数字信号输出端输出至数据传输模块。As shown in FIG2 , the data acquisition module includes an interference elimination unit, an AD converter, and a digital signal output terminal. The interference elimination unit is used to receive the filtered and amplified UHF partial discharge signal inside the GIS and the filtered and amplified external corona interference signal, and eliminate the external corona interference signal contained in the filtered and amplified UHF partial discharge signal inside the GIS by using the filtered and amplified external corona interference signal. That is to say, the interference elimination unit receives and collects the UHF partial discharge signal inside the GIS and the external corona interference signal, and uses the Q-φ statistical chart for diagnosis. The Q-φ statistical chart describes the relationship between amplitude and phase over a period of time. Generally, the x-axis represents the phase and the y-axis represents the amplitude of the signal. The spectrum divides a power frequency cycle (360°) into several phase windows. The maximum discharge amount Vs in each phase window is the maximum discharge amplitude, and the instantaneous discharge maximum value Vs is the discharge amount in the phase window in the Sth detection cycle. Considering Vs as a phase (φ) function and representing it as a bar graph, a Q-φ statistical chart can be made. The Q-φ statistical chart reflects the characteristics of the maximum discharge amplitude distributed with the phase. By using the Q-φ statistical graph relationship, the external corona interference signal released inside the UHF partial discharge signal of the GIS can be eliminated, thereby ensuring the accuracy of data collection; and the AD converter is used to convert the internal partial discharge signal of the GIS after eliminating the external corona interference signal into a digital signal, and the converted digital signal is output from the digital signal output terminal to the data transmission module.
最后，数据传输模块则将其所接收的数字信号传输至后台数据分析系统，由后台数据分析系统对相关的疏浚进行分析，从而可以及时地发现GIS内部存在的安全隐患，保证电网的安全运行。当然，需要说明的是后台数据分析系统并不是本装置的组成部分。Finally, the data transmission module transmits the digital signals it receives to the background data analysis system, which analyzes the relevant dredging, so that potential safety hazards within the GIS can be discovered in a timely manner and ensure the safe operation of the power grid. Of course, it should be noted that the background data analysis system is not an integral part of this device.
由上述分析可知，通过使用本实施例提供的GIS局部放电数据采集装置能够实时、准确地采集GIS局部放电数据，并实时地将数据传输至后台数据分析系统中，通过分析GIS局部放电检测数据，能够发现GIS内部存在的安全隐患，保证电网的安全运行。It can be seen from the above analysis that the GIS partial discharge data collection device provided by this embodiment can collect GIS partial discharge data in real time and accurately, and transmit the data to the background data analysis system in real time. By analyzing the GIS partial discharge detection data, It can discover potential safety hazards within GIS and ensure the safe operation of the power grid.
作为本实施例的一种优选，上述的GIS内部局部放电信号通道调理单元设置有三个，分别为CH1、CH2、CH3；外部电晕干扰信号通道调理单元设置有一个为CH4，一般GIS是三相一体的，三个GIS内部局部放电信号通道调理单元分别能监测A相，B相，C相，三个通道监测范围能够覆盖整个GIS装置，其余一个通道监测外部干扰，四通道监测是GIS局放监测最优的配置。As a preference of this embodiment, the above-mentioned GIS internal partial discharge signal channel conditioning units are provided with three, namely CH1, CH2, and CH3; the external corona interference signal channel conditioning unit is provided with one CH4. Generally, GIS is three-phase in one. The three GIS internal partial discharge signal channel conditioning units can monitor phase A, phase B, and phase C respectively. The monitoring range of the three channels can cover the entire GIS device. The remaining channel monitors external interference. Four-channel monitoring is the optimal configuration for GIS partial discharge monitoring.
作为本实施例的另一种优选，上述的GIS内部局部放电信号通道调理单和外部电晕干扰信号通道调理单元的放大倍数为10000倍，滤波频带为100MHz-3000MHz。这样能够有效的发现微弱的局部放电信号，提高系统的灵敏度。As another preferred embodiment of the present invention, the amplification factor of the above-mentioned GIS internal partial discharge signal channel conditioning unit and the external corona interference signal channel conditioning unit is 10000 times, and the filter frequency band is 100MHz-3000MHz, which can effectively detect weak partial discharge signals and improve the sensitivity of the system.
具体地，在本实施例中，如图3所示，上述的GIS内部局部放电信号通道调理单和外部电晕干扰信号通道调理单元均包括电容C4、C6、C9，电阻R5、R7、R3、R4、R16、R100、R10以及第一放大器和第二放大器；其中，电容C4的输入端为信号输入端，输出端分别和电阻R5和R7的一端以及第一放大器的正极相连接，电阻R7的另一端接地；电阻R3的一端接地，另一端和第一放大器的负极以及电阻R4的一端相连接，第一放大器的输出端分别和电容C6的一端以及电阻R4的另一端相连接，电容C6的另一端和电阻R16的一端相连接，电阻R16的另一端和电容C9的一端、电阻R100的一端以及第二放大器的正极相连接，电容C9的另一端以及电阻R100的另一端分别接地，第二放大器的负极和电阻R10的一端相连接，电阻R10的另一端接地，以实现对信号进行滤波放大。Specifically, in this embodiment, as shown in Figure 3, the above-mentioned GIS internal partial discharge signal channel conditioning unit and external corona interference signal channel conditioning unit include capacitors C4, C6, C9, resistors R5, R7, R3, R4, R16, R100, R10 and the first amplifier and the second amplifier; among them, the input end of the capacitor C4 is the signal input end, and the output end is connected to one end of the resistors R5 and R7 and the positive electrode of the first amplifier respectively. The resistor R7 The other end is connected to ground; one end of resistor R3 is connected to ground, and the other end is connected to the negative electrode of the first amplifier and one end of resistor R4. The output end of the first amplifier is connected to one end of capacitor C6 and the other end of resistor R4. The output end of capacitor C6 is connected to the ground. The other end is connected to one end of the resistor R16. The other end of the resistor R16 is connected to one end of the capacitor C9, one end of the resistor R100 and the positive electrode of the second amplifier. The other end of the capacitor C9 and the other end of the resistor R100 are grounded respectively. The second The negative electrode of the amplifier is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to ground to filter and amplify the signal.
上述的电容C4、C6、C9均采用无感电容，以使得滤波参数更加准确，电阻R5、R7、R3、R4、R16、R100、R10均采用绕行电阻，绕行电阻具有精度高，温度系数好等特性，第一放大器和第二放大器采用特高频、低噪音、高增益的芯片，以保证测量信号灵敏度高，动态范围大。The above-mentioned capacitors C4, C6, and C9 all use non-inductive capacitors to make the filtering parameters more accurate. The resistors R5, R7, R3, R4, R16, R100, and R10 all use winding resistors. The winding resistors have high precision and temperature coefficient. Excellent characteristics, the first amplifier and the second amplifier adopt ultra-high frequency, low noise, high gain chips to ensure high sensitivity of the measurement signal and large dynamic range.
在一个具体的实施例中，该数据传输模块采用标准协议，通过TCP/IP以太网将数字信号输至后台数据分析系统。In a specific embodiment, the data transmission module uses standard protocols to transmit digital signals to the background data analysis system through TCP/IP Ethernet.
上述的机箱外壳采用铝合金材质，能够防止外力的冲击，并具备很好的电磁兼容特性。The above-mentioned chassis shell is made of aluminum alloy, which can prevent the impact of external forces and has good electromagnetic compatibility characteristics.
上述的数据传输模块采用以太网数据传输芯片，传输速率为1000MHz，以提高数据的传输速度。The above-mentioned data transmission module adopts an Ethernet data transmission chip with a transmission rate of 1000MHz to increase the data transmission speed.
上述的AD转换器采用芯片为宽频、高采样率芯片，从而保证可检测信号频带达到100MHz-2000MHz,高采样率保证特高频信号峰值有效检出，测量特高频信号稳定。The above-mentioned AD converter uses a wide-bandwidth, high-sampling-rate chip to ensure that the detectable signal frequency band reaches 100MHz-2000MHz. The high sampling rate ensures the effective detection of UHF signal peaks and the stability of measured UHF signals.
上述实施例只是为了说明本发明的技术构思及特点，其目的是在于让本领域内的普通技术人员能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡是根据本发明内容的实质所做出的等效的变化或修饰，都应涵盖在本发明的保护范围内。The above embodiments are only for illustrating the technical concepts and characteristics of the present invention. Their purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly. They cannot limit the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the present invention should be included in the protection scope of the present invention.
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