CN211318650U - GIS equipment partial discharge on-line monitoring system - Google Patents

Abstract

The utility model discloses a GIS equipment partial discharge on-line monitoring system, GIS equipment include basin formula insulator, and the characteristic is: the system comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a centralized unit and a PC (personal computer) terminal; the ultrahigh frequency partial discharge sensor comprises an ultrahigh frequency sensor probe, a signal amplifier, a filter, an A/D converter and a power supply; the ultrahigh frequency partial discharge on-line monitoring device comprises a data processing center, an antenna and a storage battery pack. The utility model has the advantages of convenient equipment management; the sensor is digitized, and a digital signal is directly output; the monitoring device is miniaturized and designed with ultra-low power consumption; the anti-interference capability is strong, the networking is convenient, and the intelligent inspection robot monitoring system of the existing transformer substation can be wirelessly accessed; the storage capacity is large, and the data backup is convenient; the operation is simple, and the GIS equipment is not damaged; the power failure is not needed, the integrated design is realized, the reliability and the accuracy are high, and the installation and the maintenance are convenient and simple.

Description

GIS equipment partial discharge on-line monitoring system

Technical Field

The utility model belongs to the technical field of the electrical detection technique and specifically relates to a GIS equipment partial discharge on-line monitoring system is related to.

Background

A Gas Insulated metal enclosed switchgear (GIS) is an electrical device that combines high voltage electric appliances, uses pressurized sulfur hexafluoride Gas as the insulating and arc extinguishing medium, and is enclosed by a metal casing. GIS has many advantages, such as: the structure is compact, and the occupied area is small; the installation configuration is flexible and convenient, and the engineering construction period is short; simple maintenance, safe and reliable operation, long maintenance period, no external influence and the like. In a GIS internal fault, the percentage of insulation faults is the largest, and an important symptom and manifestation of the insulation faults is Partial Discharge (PD). With the development of antenna technology, researchers introduce fractal antennas into partial discharge detection, which also has a good effect, but despite the good performance of fractal antennas, fractal antennas also have many disadvantages: the bandwidth of the fundamental/low harmonic frequency is narrower; comparing and fixing adjacent frequencies; the fundamental harmonic gain is slightly lower; polarization purity is slightly low, and the fractal curve bends and twists to make the current direction inconsistent everywhere, so the electric field directivity becomes poor; less available fractal. Therefore, a detection system for GIS partial discharge fault appears to be extremely necessary.

Disclosure of Invention

An object of the utility model is to provide a GIS equipment partial discharge on-line monitoring system.

The purpose of the utility model is realized like this:

the utility model provides a GIS equipment partial discharge on-line monitoring system, GIS equipment includes basin formula insulator, and the characteristic is: the system comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a centralized unit and a PC (personal computer) terminal;

the ultrahigh frequency partial discharge sensor comprises an ultrahigh frequency sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, wherein the ultrahigh frequency sensor probe is used for capturing discharge statistical characteristics in real time, the signal amplifier is used for amplifying real-time signals, the filter is used for shaping amplified pulse signals, the A/D converter is used for converting the shaped analog signals into digital signals, and finally the digital signals are transmitted to an ultrahigh frequency partial discharge online monitoring device through an ultrahigh frequency sensor signal wire; the power supply is used for supplying electric energy to the ultrahigh frequency sensor probe, the signal amplifier, the filter and the A/D converter so as to ensure the normal work of the ultrahigh frequency partial discharge sensor;

the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack, wherein the data processing center can realize real-time alarm and automatic diagnosis of partial discharge signals, the storage battery pack is used for ensuring the normal work of the data processing center, and the antenna is used for wirelessly transmitting analog-digital signals to a centralized unit;

the centralized unit is used for receiving signals from the ultrahigh frequency partial discharge online monitoring device and uploading the signals to the PC terminal;

and the PC terminal is used for automatically generating three-dimensional spectrogram data.

The utility model provides a GIS equipment partial discharge on-line monitoring system adopts the design of integrated module, with ultrahigh frequency sensor probe, signal amplifier, the wave filter, the AD converter, data processing etc. integration in ultrahigh frequency partial discharge sensor, but every ultrahigh frequency partial discharge sensor independent operation, data record respectively, through the data transmission of wireless transmission with many ultrahigh frequency partial discharge sensors to the data processing center in, wireless data acquisition device is with data transmission to the unified management analysis on the central unit again, can carry out remote transmission and real time monitoring through the internet, carry out on-line analysis to the partial discharge signal.

The working principle of the invention is as follows: each partial discharge of the GIS device can generate broadband electromagnetic transient and electromagnetic waves. The electrical breakdown processes of different types of partial discharge types are different and thus produce pulse currents of different amplitudes and steepnesses, and thus electromagnetic transients and electromagnetic waves, SF, of different frequencies as components₆The pulse current generated by the partial discharge in the gas has a relatively high steepness, and the frequency of the generated electromagnetic transient can reach more than 1 GHz. The partial discharge can generate broadband electromagnetic transient and electromagnetic waves, partial discharge signal sensing can be carried out in different frequency bands, and ultrahigh frequency sensing (0.3-1.5 GHz) is adopted because an ultrahigh frequency sensing mode can bring remarkable improvement of anti-interference performance and realize partial discharge positioning.

When partial discharge occurs, the electromagnetic wave signal is repeatedly transmitted, reflected, refracted, delayed, attenuated and the like according to the GIS structure, and is radiated to the outside through the basin-type insulator. Electromagnetic waves leaked through the GIS insulator are detected through the high-sensitivity sensor. Electromagnetic wave signals excited by partial discharge in the GIS are detected through the sensor, sampling, processing, storage, digital signal processing and analysis are carried out, and the signals are transmitted to the central unit in a wireless mode.

Therefore, the utility model has the advantages of as follows:

1. the equipment management is convenient;

2. the sensor is digitized, and a digital signal is directly output;

3. the monitoring device is miniaturized and designed with ultra-low power consumption;

4. the anti-interference capability is strong, the networking is convenient, and the intelligent inspection robot monitoring system of the existing transformer substation can be wirelessly accessed;

5. the storage capacity is large, and the data backup is convenient;

6. the operation is simple, and the GIS equipment is not damaged;

7. the power failure is not needed, the integrated design is realized, the reliability and the accuracy are high, and the installation and the maintenance are convenient and simple.

Drawings

Fig. 1 is a schematic block diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to the attached figure 1, the GIS equipment partial discharge online monitoring system comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a centralized unit, a PC (personal computer) terminal and GIS equipment, wherein the GIS equipment adopts a basin-type insulator;

the ultrahigh frequency partial discharge sensor comprises an ultrahigh frequency sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, wherein the ultrahigh frequency sensor probe is used for capturing discharge statistical characteristics in real time, the signal amplifier is used for amplifying real-time signals, the filter is used for shaping amplified pulse signals, the A/D converter is used for converting the shaped analog signals into digital signals, and finally the digital signals are transmitted to an ultrahigh frequency partial discharge online monitoring device through an ultrahigh frequency sensor signal wire; the power supply is used for supplying electric energy to the ultrahigh frequency sensor probe, the signal amplifier, the filter and the A/D converter so as to ensure the normal work of the ultrahigh frequency partial discharge sensor;

the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack, wherein the data processing center can realize real-time alarm and automatic diagnosis of partial discharge signals, the storage battery pack is used for ensuring the normal work of the data processing center, and the antenna is used for wirelessly transmitting analog-digital signals to a centralized unit;

the centralized unit is used for receiving signals from the ultrahigh frequency partial discharge online monitoring device and uploading the signals to the PC terminal;

and the PC terminal is used for automatically generating three-dimensional spectrogram data.

The working principle is as follows:

after the ultrahigh frequency sensor probe captures the discharge statistical characteristics in real time, transmitting the discharge characteristics to a signal amplifier, amplifying the captured discharge characteristics by the signal amplifier, transmitting the amplified signals to a filter, filtering interference signals in the received amplified signals by the filter, converting the filtered signals into digital signals by an A/D converter, and transmitting the digital signals to an ultrahigh frequency partial discharge online monitoring device; the ultrahigh frequency partial discharge online monitoring device receives data, realizes real-time alarm and automatic diagnosis, and transmits signals to the central unit, the central unit receives signals from the ultrahigh frequency partial discharge online monitoring device and uploads the signals to the PC terminal, and the PC terminal receives the data and displays a three-dimensional spectrogram in real time.

Claims (1)

1. The utility model provides a GIS equipment partial discharge on-line monitoring system, GIS equipment package crosses basin formula insulator which characterized in that: the system comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a centralized unit and a PC (personal computer) terminal;

the ultrahigh frequency partial discharge sensor comprises an ultrahigh frequency sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, wherein the ultrahigh frequency sensor probe is used for capturing discharge statistical characteristics in real time, the signal amplifier is used for amplifying real-time signals, the filter is used for shaping amplified pulse signals, the A/D converter is used for converting shaped analog signals into digital signals, and finally the digital signals are transmitted to an ultrahigh frequency partial discharge online monitoring device through an ultrahigh frequency sensor signal wire; the power supply is used for supplying electric energy to the ultrahigh frequency sensor probe, the signal amplifier, the filter and the A/D converter so as to ensure the normal work of the ultrahigh frequency partial discharge sensor;

the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack, wherein the data processing center can realize real-time alarm and automatic diagnosis of partial discharge signals, the storage battery pack is used for ensuring the normal work of the data processing center, and the antenna is used for wirelessly transmitting digital signals to a centralized unit;

the centralized unit is used for receiving signals from the ultrahigh frequency partial discharge online monitoring device and uploading the signals to the PC terminal;

and the PC terminal is used for automatically generating three-dimensional spectrogram data.

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