CN220399571U - GIS partial discharge on-line monitoring device - Google Patents
GIS partial discharge on-line monitoring device Download PDFInfo
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- CN220399571U CN220399571U CN202320106951.1U CN202320106951U CN220399571U CN 220399571 U CN220399571 U CN 220399571U CN 202320106951 U CN202320106951 U CN 202320106951U CN 220399571 U CN220399571 U CN 220399571U
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Abstract
The utility model discloses a GIS partial discharge on-line monitoring device in the technical field of GIS equipment monitoring, which comprises: the ultrahigh frequency sensor module is used for receiving the pulse signals of partial discharge; the signal conditioning module is connected to the ultrahigh frequency sensor module and is used for filtering useless signals and reserving the useless signals to obtain partial discharge pulse envelope signals; the signal acquisition processing module is connected to the signal conditioning module and is used for executing peak detection and calibration of the partial discharge pulse envelope signals passing through the signal conditioning module, the GIS partial discharge on-line monitoring device is used for acquiring partial discharge phenomena inside and outside the GIS tank body through the ultrahigh frequency sensor module and carrying out filtering processing on the acquired signals through the signal conditioning module, the partial discharge signals generated by the GIS tank body can be effectively acquired and detected, meanwhile, the environmental noise interference is distinguished, and the GIS operation reliability is improved.
Description
Technical Field
The utility model relates to the technical field of GIS equipment monitoring, in particular to a GIS partial discharge on-line monitoring device.
Background
GIS equipment can be subjected to various factors (electricity, heat, machinery, environment and the like) in the operation process, and complicated chemical and physical changes occur in the GIS equipment, so that the performance is gradually deteriorated, and the phenomenon is called aging. In order to ensure the quality of the equipment and the reliability of power supply of the system, strict quality inspection is required before the equipment is put into operation, and accidents caused by the quality are basically eliminated. In order to exert the maximum production capacity of the GIS device, daily scientific management and maintenance are often required. GIS equipment on-line monitoring and fault diagnosis significance is great. State maintenance based on state monitoring and fault diagnosis is currently being developed. After the state monitoring and fault diagnosis technology is adopted, the preventive maintenance can be transited to the predictive maintenance, namely the state maintenance, and the process of transiting from ' due necessary maintenance ' to ' the maintenance. Partial discharge detection on the GIS can effectively find early insulation defects in the GIS so as to take measures, avoid further development and improve the reliability of the GIS. The method can also make up the defect of a withstand voltage test, can find the cleanliness of GIS manufacture and installation through partial discharge on-line monitoring, can find defects and errors in the insulation manufacturing process and the installation process, and can determine the fault position, thereby carrying out effective treatment and ensuring the safe operation of equipment.
The existing GIS equipment on-line monitoring device mainly detects GIS equipment through an ultrasonic sensor, acquires ultrasonic data through the ultrasonic sensor and carries out remote transmission through communication equipment, but because noise exists near the GIS equipment, the noise can influence the data acquired by the ultrasonic sensor, so that the reliability of the GIS equipment on-line monitoring device in operation is reduced.
Disclosure of Invention
The utility model aims to provide a GIS partial discharge on-line monitoring device, which solves the problem that the noise in the vicinity of GIS equipment can influence the data collected by an ultrasonic sensor, so that the running reliability of the GIS equipment on-line monitoring device is reduced.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a GIS partial discharge on-line monitoring device, comprising:
the ultrahigh frequency sensor module is used for receiving the pulse signals of partial discharge;
the signal conditioning module is connected to the ultrahigh frequency sensor module and is used for filtering useless signals and reserving the useless signals to obtain partial discharge pulse envelope signals;
the signal acquisition processing module is connected to the signal conditioning module and is used for executing peak detection and calibration of the partial discharge pulse envelope signal passing through the signal conditioning module;
the communication module is connected to the signal acquisition processing module and used for performing the process of sending the processed data characteristic values to the server through the group package.
Preferably, the ultrahigh frequency sensor module comprises an external ultrahigh frequency sensor module and an internal ultrahigh frequency sensor module;
the built-in ultrahigh frequency sensor module is arranged in the GIS;
the external ultrahigh frequency sensor module is arranged at the position of the GIS external basin-type insulator.
Preferably, the signal conditioning module comprises a low noise amplifier LAN, a combining filter and a detector;
the low noise amplifier LAN is connected to the uhf sensor module;
the combining filter is connected to the low noise amplifier LAN;
the detector is connected to the combined filter and is connected with the signal acquisition processing module.
Preferably, the system further comprises a synchronous control module, wherein the synchronous control module is connected to the signal acquisition processing module and used for executing map phase alignment.
Preferably, the power management module further comprises a synchronization signal interface and a power supply, wherein the synchronization signal interface is connected to the synchronization control module and used for providing one path of 50HzPT synchronization signals.
Preferably, the system further comprises an oscilloscope module, wherein the oscilloscope module is connected to the server and used for performing acquisition, analysis and display of fault voltage waveforms.
Compared with the prior art, the utility model has the beneficial effects that: the GIS partial discharge on-line monitoring device collects partial discharge phenomena inside and outside the GIS tank body through the ultrahigh frequency sensor module, and performs filtering processing on the collected signals through the signal conditioning module, so that partial discharge signals generated by the GIS tank body can be effectively collected and detected, meanwhile, environmental noise interference is distinguished, and the operation reliability of the GIS is improved.
Drawings
Fig. 1 is a schematic block diagram of the structure of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a GIS partial discharge on-line monitoring device, which collects partial discharge phenomena inside and outside a GIS tank body through an ultrahigh frequency sensor module, and carries out filtering treatment on the collected signals through a signal conditioning module, so that partial discharge signals generated by the GIS tank body can be effectively collected and detected, meanwhile, environmental noise interference is distinguished, and the operation reliability of the GIS is improved, and referring to fig. 1, the device comprises: the system comprises an ultrahigh frequency sensor module, a signal conditioning module, a signal acquisition processing module and a communication module;
referring to fig. 1 again, the uhf sensor module is configured to perform receiving a partial discharge pulse signal, where the uhf sensor module includes an external uhf sensor module and an internal uhf sensor module, where the uhf sensor module is divided into an external sensor module and an internal sensor module, and the internal sensor is usually pre-installed before leaving the factory of the GIS, and mainly uses a disc sensor, which has the outstanding advantages of good performance and high sensitivity, and also avoids interference of an external environment of the GIS, and has a simple disc structure, and does not cause distortion of an internal electric field of the GIS, and the external sensor is installed at a basin-type insulator outside the GIS to receive electromagnetic wave signals radiated outwards from the inside of the GIS;
the signal conditioning module is connected to the ultrahigh frequency sensor module and used for filtering useless signals and reserving the useless signals to obtain partial discharge pulse envelope signals, the signal conditioning module comprises a low noise amplifier LAN, a combined filter and a wave detector, the low noise amplifier LAN is connected to the ultrahigh frequency sensor module, the combined filter is connected to the low noise amplifier LAN, the wave detector is connected to the combined filter, the wave detector is connected with the signal acquisition processing module, the partial discharge pulse signals are acquired through the ultrahigh frequency sensor module and uploaded to the low noise amplifier LAN, signals except 300 MHz-1.5 GMz are filtered through the low noise amplifier LAN and the combined filter (high pass, low pass and band stop), and the communication frequency band is filtered through the wave detector, so that the partial discharge pulse envelope signals of about 20MHz are obtained;
the power management module comprises a synchronous signal interface and a power supply, wherein the synchronous signal interface is connected to the synchronous control module and is used for executing the provision of one path of 50HzPT synchronous signal, the power supply consists of a storage battery and a super capacitor and is used for providing power for the whole device, the AC is converted into DC to supply power for a main control board 5V, one path of 50HzPT (220V) synchronous signal is provided through the synchronous signal interface and is used as one of 50Hz synchronous control sources, and an amplifying circuit with a clamping protection function is designed to prevent the damage to a system when the signal is overlarge;
the signal acquisition processing module is connected with the signal conditioning module and used for executing peak detection and calibration of the partial discharge pulse envelope signal passing through the signal conditioning module, the signal conditioning module further comprises a synchronous control module, the synchronous control module is connected with the signal acquisition processing module and used for executing spectrum phase alignment, the partial discharge pulse envelope signal is uploaded to the signal acquisition processing module through a detector, the signal acquisition processing module has a 50M sampling rate, a 12bit high-speed ADC acquires the partial discharge pulse envelope signal passing through the signal conditioning module and an FPGA signal to carry out peak detection and calibration to obtain N-point PRPS in 1S, ARM calls the original data processed by the FPGA, further analysis and operation are carried out to obtain characteristic values such as partial discharge phase, frequency, amplitude value, maximum value, average value and the like, the characteristic values are interacted with a server through interaction protocol, and finally, the real-time PRPS three-dimensional spectrum, PRPD two-dimensional spectrum, event, trend, alarm and other service functions are displayed on a page, the 50Hz synchronous module mainly comprises three synchronous signals PT synchronous, AC220V synchronous and external synchronous, ARM control pins are used for controlling and selecting, synchronous signals are set for PRPS map phase alignment, a main stream ARM chip IM6ULL+FPGA chip is adopted by the signal acquisition processing module to ensure the stable working and running of the device, an operating system supports self-checking, self-diagnosing and self-recovering functions, files or subareas are recovered when the files are checked to be damaged and cannot be repaired, an embedded Linux operating system, a convenient one-key subarea and installing system function, CPU plug-in supports user program local and remote upgrading, acquisition board FPGA program supports local and remote upgrading functions, the remote upgrading can be realized only by being in the same network section with a computer and equipment, a large-scale integrated circuit is used as a design basis, a small-package patch manufacturing technology and a multi-layer board design technology are adopted, the device completes all functions with the minimum volume, the optimized structural design fully utilizes the internal space, has small whole volume, strong configurability, convenient system maintenance and maintenance, flexible configuration of hardware modules, supports PT synchronization, AC220V synchronization, external frequency modulation synchronization and various synchronization modes, and synchronization effectiveness judgment and automatic switching functions, has the frequency measurement precision of 0.02Hz and the frequency measurement range of 49.0 to 51.0Hz, ensures accurate drawing of PRPS/PRPD patterns, supports Beidou synchronization, PPS second synchronization, ensures accurate time acquisition of the device, and has the frequency response range of: 300MHz-1500MHz,50MHz,12 bit ADC, each monitoring sensor is equipped with independent acquisition channels, can realize the continuous, real-time sampling function, possess the function of continuous real-time automatic monitoring, recording to the partial discharge basic characteristic parameter such as the partial discharge amplitude (maximum discharge capacity, average discharge capacity), phase place, frequency, etc., reliable partial discharge intelligent recognition base, can feedback the discharge probability to the typical discharge type, the programmed switch of the multiband filter, switch the frequency band to the narrow frequency, full frequency, low frequency, high frequency, effective noise interference frequency band, achieve the goal of auxiliary noise reduction, intelligent noise reduction function, support manual noise reduction, self-adaptive noise sensor noise reduction, self-adaptive noise reduction is based on signal average value is processed, the associated noise sensor noise reduction, process the signal amplitude of adjacent phase window, effectively distinguish the interference of ambient noise to the monitoring signal, prevent the false judgement of partial discharge alarm, the event trigger mechanism, the amplitude and event trigger amplitude threshold contrast of each point of PRPS signal after noise reduction and the number of times of event trigger threshold are based, carry on the trigger threshold of the number of times of reaching, as the source of the partial discharge alarm data, the amplification data is screened, the degree of interference signal is greatly improved, reliability is improved;
the communication module is connected to the signal acquisition processing module and is used for carrying out the process of sending the processed data characteristic values to the server through the package, and the communication module also comprises an oscilloscope module, wherein the oscilloscope module is connected to the server and is used for carrying out the acquisition analysis and displaying fault voltage waveforms, the communication module selects optical fibers and optical fiber switches to finally send the ARM processed data characteristic values to the server through the package in an Ethernet communication mode, and the oscilloscope module is mainly used for acquiring and analyzing the fault voltage waveforms and calculating fault waveform time difference delta t.
Examples
The device adopts the double-end positioning principle, can not set that the fault point is located in the interval, two sensors of the monitoring point are distributed and installed at the M and N positions of the GIS tank body, the installation direction of the device faces one end, the fault point is generated at the C point of the M and N interval, the initial traveling wave generated by the fault point C is transmitted to the two ends along the space at the speed V, and the time when the initial traveling wave reaches the M end and the N end at the two sides is t respectively M 、t N The distance from the fault point to the monitoring points at the two ends is as follows:
L M ＝(L+V·(t M -t N ))/2
L N ＝(L-V·(t M -t N ))/2
in the method, in the process of the utility model,
L M -the distance of the fault point from the monitoring terminal M;
l—the length between the monitor terminal M and the monitor terminal N;
v—the speed at which the travelling wave propagates over the wire;
t M -the moment when the fault travelling wave first reaches the M-terminal;
t N -the moment when the fault travelling wave first reaches the N-terminal;
L N -the distance of the fault point from the monitoring terminal N;
selecting two monitoring points meeting the requirements from monitoring points 1-6 as M end and N end of fault location, respectively connecting the two abnormal signals into channels of a detection device with an oscilloscope function, opening oscilloscope software matched with the two abnormal signals, setting proper trigger threshold values, measuring fault signal waveforms of the two points, if a cursor 1 corresponds to an A channel, a cursor 2 corresponds to a B channel, the time difference delta t of the two abnormal signals is ns, the two points of double-end fault location are judged according to the size of the abnormal signals, the distance between the two points of the double-end fault location is L, and the two points of the double-end fault location are measured on site by a formula L M = (L-v×Δt)/2, distance L of suspected fault point from one of the points M 。
Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner so long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of brevity and resource saving. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. The utility model provides a GIS partial discharge on-line monitoring device which characterized in that: comprising the following steps:
the ultrahigh frequency sensor module is used for receiving the pulse signals of partial discharge;
the signal conditioning module is connected to the ultrahigh frequency sensor module and is used for filtering useless signals and reserving the useless signals to obtain partial discharge pulse envelope signals;
the signal acquisition processing module is connected to the signal conditioning module and is used for executing peak detection and calibration of the partial discharge pulse envelope signal passing through the signal conditioning module, and the signal acquisition processing module adopts a mainstream ARM chip IM6ULL plus an FPGA chip;
the communication module is connected to the signal acquisition processing module and is used for performing the process of sending the processed data characteristic values to the server through the group package;
and the oscilloscope module is connected to the server and used for executing acquisition, analysis and display of fault voltage waveforms.
2. The GIS partial discharge on-line monitoring device according to claim 1, wherein: the ultrahigh frequency sensor module comprises an external ultrahigh frequency sensor module and an internal ultrahigh frequency sensor module;
the built-in ultrahigh frequency sensor module is arranged in the GIS;
the external ultrahigh frequency sensor module is arranged at an external basin-type insulator of the GIS.
3. The GIS partial discharge on-line monitoring device according to claim 2, wherein: the signal conditioning module comprises a low noise amplifier LAN, a combined filter and a detector;
the low noise amplifier LAN is connected to the uhf sensor module;
the combining filter is connected to the low noise amplifier LAN;
the detector is connected to the combined filter and is connected with the signal acquisition processing module.
4. A GIS partial discharge on-line monitoring device according to claim 3, wherein: the system also comprises a synchronous control module which is connected to the signal acquisition processing module and is used for executing the map phase alignment.
5. The GIS partial discharge on-line monitoring device according to claim 4, wherein: the power management module comprises a synchronous signal interface and a power supply, wherein the synchronous signal interface is connected to the synchronous control module and is used for providing one path of 50HzPT synchronous signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320106951.1U CN220399571U (en) | 2023-02-03 | 2023-02-03 | GIS partial discharge on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320106951.1U CN220399571U (en) | 2023-02-03 | 2023-02-03 | GIS partial discharge on-line monitoring device |
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| CN220399571U true CN220399571U (en) | 2024-01-26 |
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| CN202320106951.1U Active CN220399571U (en) | 2023-02-03 | 2023-02-03 | GIS partial discharge on-line monitoring device |
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- 2023-02-03 CN CN202320106951.1U patent/CN220399571U/en active Active
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