Switch cabinet partial discharge detection and identification device based on ultrasonic detection method
A technology for partial discharge detection and identification equipment, which is applied in the direction of using acoustic measurement for testing, measuring electricity, and measuring electrical variables. Affect the signal quality of the device and other issues, achieve fast interrupt processing and hardware I/O support, improve accuracy and reliability, and facilitate identification
Inactive Publication Date: 2020-09-08
YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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Problems solved by technology
However, in the UHV substation, there are many electromagnetic interference signals and the amplitude of the interference signal is large, which affects the signal quality between equipment, reduces the signal-to-noise ratio, and affects the accuracy and reliability of partial discharge detection equipment.
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[0031] The communication facilities in the UHV substation are relatively complete, and there will be different types of communication interference signals on site. There are communication base stations, signal towers and other facilities near some UHV substations, and the above-mentioned facilities will inevitably generate fixed-frequency communication signals during operation. Therefore, in the process of partial discharge detection in substations, it is difficult to completely shield external electromagnetic interference signals. These interference signals interfere with the signal transmission and reception between the partial discharge detection equipment and the server, affecting the accuracy and reliability of the detection equipment. .
[0032] Such as figure 1 , 2 As shown, the present invention mainly includes a signal acquisition unit, a signal processing unit, a core control unit and a human-computer interaction interface. The signal acquisition unit includes a t...
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A switch cabinet partial discharge detection and identification device based on an ultrasonic detection method is used for accurately detecting partial discharge of a switch cabinet and solving the problem of interference of interference signals on detection signals. The device comprises a signal acquisition unit which comprises a plurality of contact sensors; a signal acquisition unit arranged onan equipment main body; a signal processing unit which comprises sampling signal circuit boards which are in one-to-one correspondence with the contact sensors and are electrically connected with thecontact sensors, wherein each signal sampling circuit board comprises an amplification circuit, a filter circuit and an A / D conversion circuit; a core control unit which comprises a control part anda signal analysis and identification part, wherein the control part is a DSP chip; a signal analysis and identification part in which a built-in computer runs a wavelet transform analysis algorithm isarranged to identify the fault type of the acquired signal; a human-computer interaction interface which comprises a liquid crystal screen and keys.
Description
technical field [0001] The invention relates to the technical field of partial discharge detection of electrical equipment, in particular to a partial discharge detection and identification device of a switch cabinet based on an ultrasonic detection method. Background technique [0002] Partial discharge is an important hidden danger that threatens the stable operation of the power grid. The normal operation of high-voltage electrical equipment is related to the safety and reliability of the entire power system. Switchgear is an important switching device widely used in urban power grids. Partial discharges caused by insulation defects of switchgears occur from time to time. If the problems cannot be found and dealt with in time, it may lead to major accidents such as large-scale power outages. In recent years, GIS partial discharge detection technology has made great progress, and partial discharge detection equipment is developing in a more accurate and high-end direction....
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Login to View More IPC IPC(8): G01R31/12
CPCG01R31/1209G01R31/1227
Inventor 张春旭杜业平王军波杨富栋宋方超王彦清
Owner YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER