CN110794267A - A fault detection system for partial discharge in GIS - Google Patents
A fault detection system for partial discharge in GIS Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000012806 monitoring device Methods 0.000 claims abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 14
- 238000003745 diagnosis Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 230000001052 transient effect Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- 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
- G01R31/1254—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 gas-insulated power appliances or vacuum gaps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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Abstract
本发明公开了一种用于GIS局部放电故障检测系统，包括特高频局部放电传感器、特高频局部放电在线监测装置、集中单元和PC端，所述局部放电传感器连接在线监测装置，在线监测装置还通过集中单元连接PC端。所述特高频局部放电传感器包括传感器探头、信号放大器、滤波器、A/D转换器和电源，所述特高频局部放电在线监测装置包括数据处理中心、天线和蓄电池组。本发明在SF6气体中局部放电所产生的脉冲电流具有比较高的陡度，所产生的电磁暂态的频率能够达到1GHz以上。局部放电能够产生宽频带的电磁暂态和电磁波，在不同频段均能进行局部放电信号传感，之所以要采用特高频传感（0.3‑1.5GHz）是因为特高频传感方式能带来抗干扰性能的显著提高和实现局部放电故障的准确检测。
The invention discloses a partial discharge fault detection system for GIS, comprising an ultra-high frequency partial discharge sensor, an ultra-high frequency partial discharge on-line monitoring device, a centralized unit and a PC terminal. The partial discharge sensor is connected to the on-line monitoring device, and the on-line monitoring The device is also connected to the PC side through the centralized unit. The UHF partial discharge sensor includes a sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, and the UHF partial discharge online monitoring device includes a data processing center, an antenna and a battery pack. The pulse current generated by the partial discharge in the SF6 gas in the present invention has a relatively high steepness, and the frequency of the generated electromagnetic transient can reach more than 1 GHz. Partial discharge can generate electromagnetic transients and electromagnetic waves in a wide frequency band, and partial discharge signal sensing can be performed in different frequency bands. The reason why UHF sensing (0.3-1.5GHz) is used is that the UHF sensing method can To significantly improve the anti-interference performance and achieve accurate detection of partial discharge faults.
Description
技术领域technical field
本发明涉及电气检测技术领域，尤其是涉及一种用于GIS局部放电故障检测系统。The invention relates to the technical field of electrical detection, in particular to a partial discharge fault detection system for GIS.
背景技术Background technique
气体绝缘的金属封闭式组合电器(Gas Insulated Substation，简称GIS)将高压电器组合在一起，以有压六氟化硫气体作绝缘和灭弧介质，外包金属外壳密封的电气设备。GIS具有很多优点，例如：结构紧凑，占地面积少；安装配置灵活方便，工程建设周期短；维护简单，运行安全可靠，检修周期长和不受外界影响等。GIS内部故障中绝缘故障所占比重最大，而绝缘故障的重要征兆和表现形式是局部放电(Partial Discharge，简称PD)。随着天线技术的发展，研究人员将分形天线引入了局部放电检测中，也取得了很好的效果，但是尽管分形天线有诸多良好性能，分形天线同样也有很多缺点：基次/低次谐频带宽较窄；邻频比较固定；基谐频增益稍低；极化纯度稍低，分形曲线弯折扭曲使得电流方向处处不尽一致，因此电场方向性变差；可用分形体较少。因此一种用于GIS局部放电故障检测方法显得极为有必要。Gas Insulated Substation (GIS for short) is a combination of high-voltage electrical appliances, with pressurized sulfur hexafluoride gas as insulation and arc extinguishing medium, and an electrical equipment sealed by a metal casing. GIS has many advantages, such as: compact structure, small footprint; flexible and convenient installation and configuration, short construction period; simple maintenance, safe and reliable operation, long maintenance period and no external influence. Insulation faults account for the largest proportion of GIS internal faults, and the important symptom and manifestation of insulation faults is partial discharge (Partial Discharge, referred to as PD). With the development of antenna technology, researchers have introduced fractal antennas into partial discharge detection and achieved good results. However, although fractal antennas have many good properties, they also have many disadvantages: fundamental/low-order harmonics The bandwidth is narrow; the adjacent frequency is relatively fixed; the gain of the fundamental harmonic frequency is slightly lower; the polarization purity is slightly lower, and the fractal curve is bent and twisted, so that the current direction is not consistent everywhere, so the electric field directionality becomes poor; there are fewer fractals available. Therefore, a method for detecting partial discharge faults in GIS is extremely necessary.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种用于GIS局部放电故障检测系统。The purpose of the present invention is to provide a partial discharge fault detection system for GIS.
本发明的目的是这样实现的：The object of the present invention is achieved in this way:
一种用于GIS局部放电故障检测系统，特征是：包括特高频局部放电传感器、特高频局部放电在线监测装置、集中单元和PC端，所述特高频局部放电传感器连接特高频局部放电在线监测装置，特高频局部放电在线监测装置通过集中单元连接PC端，集中单元用于接受来自特高频局部放电在线监测装置的信号并上传至PC端，PC端用于自动生成三维谱图数据，并实时显示。A partial discharge fault detection system for GIS, which is characterized by comprising: an ultra-high frequency partial discharge sensor, an ultra-high frequency partial discharge online monitoring device, a centralized unit and a PC terminal, and the ultra-high frequency partial discharge sensor is connected to the ultra-high frequency local discharge. The discharge online monitoring device, the UHF partial discharge online monitoring device is connected to the PC terminal through the centralized unit. The centralized unit is used to receive the signal from the UHF partial discharge online monitoring device and upload it to the PC terminal, and the PC terminal is used to automatically generate the three-dimensional spectrum. Graph data and display it in real time.
作为本发明的进一步方案：所述特高频局部放电传感器包括传感器探头、信号放大器、滤波器、A/D转换器和电源，传感器探头用于实时捕获作为放电统计特征的脉冲信号并传送给信号放大器，信号放大器用于将传感器探头实时捕获的脉冲信号进行放大处理并传送给滤波器，滤波器用于将放大后的脉冲信号进行整形并传送给A/D转换器，A/D转换器用于将整形后的信号转换为数字信号并传送给特高频局部放电在线监测装置，电源用于提供电能给特高频局部放电传感器以保证特高频局部放电传感器正常工作。As a further solution of the present invention: the UHF partial discharge sensor includes a sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, and the sensor probe is used to capture the pulse signal as a statistical feature of the discharge in real time and transmit it to the signal Amplifier, the signal amplifier is used to amplify the pulse signal captured by the sensor probe in real time and transmit it to the filter. The filter is used to shape the amplified pulse signal and transmit it to the A/D converter. The A/D converter is used to convert the The shaped signal is converted into a digital signal and sent to the UHF partial discharge on-line monitoring device, and the power supply is used to provide power to the UHF partial discharge sensor to ensure the normal operation of the UHF partial discharge sensor.
作为本发明的进一步方案：所述特高频局部放电在线监测装置包括数据处理中心、天线和蓄电池组，数据处理中心将A/D转换器送来的整形后的数字信号进行判定，实现对局部放电信号进行实时报警和自动诊断，天线用于将故障信号无线传输给集中单元，蓄电池组用于确保特高频局部放电在线监测装置正常工作。As a further scheme of the present invention: the UHF partial discharge online monitoring device includes a data processing center, an antenna and a battery pack, and the data processing center judges the shaped digital signal sent by the A/D converter to realize the local The discharge signal is used for real-time alarm and automatic diagnosis, the antenna is used to wirelessly transmit the fault signal to the centralized unit, and the battery pack is used to ensure the normal operation of the UHF partial discharge online monitoring device.
作为本发明的进一步方案：所述PC端设有液晶触摸显示器。As a further solution of the present invention: the PC end is provided with a liquid crystal touch display.
作为本发明的进一步方案：所述传感器探头采用特高频传感器探头。As a further solution of the present invention: the sensor probe adopts a UHF sensor probe.
作为本发明的进一步方案：所述天线采用天线阵列。As a further solution of the present invention: the antenna adopts an antenna array.
作为本发明的进一步方案：所述蓄电池组采用锂电池。As a further solution of the present invention: the battery pack adopts a lithium battery.
与现有技术相比，本发明的有益效果是：本发明在SF6气体中局部放电所产生的脉冲电流具有比较高的陡度，所产生的电磁暂态的频率能够达到1GHz以上。局部放电能够产生宽频带的电磁暂态和电磁波，在不同频段均能进行局部放电信号传感，之所以要采用特高频传感（0.3-1.5GHz）是因为特高频传感方式能带来抗干扰性能的显著提高和实现局部放电故障的准确检测。Compared with the prior art, the beneficial effects of the present invention are: the pulse current generated by the partial discharge in the SF6 gas has a relatively high steepness, and the frequency of the generated electromagnetic transient can reach more than 1 GHz. Partial discharge can generate electromagnetic transients and electromagnetic waves in a wide frequency band, and partial discharge signal sensing can be performed in different frequency bands. The reason why UHF sensing (0.3-1.5GHz) is used is that the UHF sensing method can To significantly improve the anti-interference performance and achieve accurate detection of partial discharge faults.
附图说明Description of drawings
图1是本发明的原理框图。Fig. 1 is a principle block diagram of the present invention.
具体实施方式Detailed ways
下面结合实施例并对照附图对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.
实施例1：Example 1:
请参阅图1，一种用于GIS局部放电故障检测系统，GIS设备采用盆式绝缘子，包括特高频局部放电传感器、特高频局部放电在线监测装置、集中单元和PC端，特高频局部放电传感器包括特高频传感器探头、信号放大器、滤波器、A/D转换器和电源，特高频传感器探头用于实时捕获作为放电统计特征的脉冲信号并传送给信号放大器，信号放大器用于将传感器探头实时捕获的脉冲信号进行放大处理并传送给滤波器，滤波器用于滤除接收到的放大信号中的干扰信号，并将处理好的放大后的脉冲信号进行整形并传送给A/D转换器，A/D转换器用于将整形后的信号转换为数字信号，并通过特高频传感器信号线将数字信号传送给特高频局部放电在线监测装置，电源用于提供电能给特高频局部放电传感器以保证特高频局部放电传感器正常工作；Please refer to Figure 1, a partial discharge fault detection system for GIS, GIS equipment adopts basin insulator, including UHF partial discharge sensor, UHF partial discharge online monitoring device, centralized unit and PC terminal, UHF partial discharge The discharge sensor includes a UHF sensor probe, a signal amplifier, a filter, an A/D converter and a power supply. The UHF sensor probe is used to capture the pulse signal as a statistical characteristic of discharge in real time and transmit it to the signal amplifier. The signal amplifier is used to The pulse signal captured by the sensor probe in real time is amplified and sent to the filter. The filter is used to filter out the interference signal in the received amplified signal, and the processed amplified pulse signal is shaped and sent to the A/D conversion. The A/D converter is used to convert the shaped signal into a digital signal, and transmit the digital signal to the UHF partial discharge online monitoring device through the UHF sensor signal line, and the power supply is used to provide electrical energy to the UHF local Discharge sensor to ensure normal operation of UHF partial discharge sensor;
特高频局部放电在线监测装置包括数据处理中心、天线和蓄电池组，数据处理中心将A/D转换器送来的整形后的数字信号进行判定，实现对局部放电信号进行实时报警和自动诊断，天线用于将故障信号无线传输给集中单元，集中单元用于接受来自特高频局部放电在线监测装置的信号并上传至PC端，PC端用于自动生成三维谱图数据，并实时显示。蓄电池组用于确保特高频局部放电在线监测装置正常工作。The UHF partial discharge online monitoring device includes a data processing center, an antenna and a battery pack. The data processing center judges the shaped digital signal sent by the A/D converter, and realizes real-time alarm and automatic diagnosis of the partial discharge signal. The antenna is used to wirelessly transmit the fault signal to the centralized unit, and the centralized unit is used to receive the signal from the UHF partial discharge online monitoring device and upload it to the PC terminal. The PC terminal is used to automatically generate 3D spectrogram data and display it in real time. The battery pack is used to ensure the normal operation of the UHF partial discharge online monitoring device.
实施例2：Example 2:
在实施例1的基础上，PC端设有液晶触摸显示器，可以通过触摸功能来查看各项数据，操作方便。On the basis of Embodiment 1, the PC end is provided with a liquid crystal touch display, and various data can be viewed through the touch function, which is convenient to operate.
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.
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| CN116993328A (en) * | 2023-09-26 | 2023-11-03 | 国网湖北省电力有限公司超高压公司 | Operation and maintenance method and device for power system equipment combined with SF6 gas monitoring |
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| CN116993328B (en) * | 2023-09-26 | 2023-12-22 | 国网湖北省电力有限公司超高压公司 | Operation and maintenance method and device for power system equipment combined with SF6 gas monitoring |
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