Combined electric apparatus partial discharge multi-information fusion diagnostic device

Abstract

The invention relates to the technical field of partial discharge detection equipment, and especially relates to a combined electric apparatus partial discharge multi-information fusion diagnostic device. The device is formed by connecting an ultrahigh-frequency signal conversion module, a high-frequency signal conversion module, an ultrasonic signal conversion module, a power frequency signal conversion module and a collection and analysis module. The device can simultaneously detect partial discharging ultrahigh-frequency signal, high-frequency signal and ultrasonic signal, contrastive analysis is performed on the three kinds of acoustoelectric signals, the anti-interference capacity is strong, the positioning is precise, so that the effectiveness and reliability of the detection result is greatly improved. The device avoids the attenuation caused by cable transmitting analog signal, the wiring of the device is more concise than before, and the in-site application is more flexible. The synchronous starting and parallel acquiring of high / low speed data acquisition units are realized. According to the invention, the device is based on the virtual instrument technology, the cost is low, the software development cycle is short, the structure is flexible, and the expansibility is strong.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection equipment, in particular to a multi-information fusion diagnosis device for partial discharge of combined electric appliances. Background technique [0002] Gas insulated switchgear (GIS) has been more and more widely used at home and abroad in recent decades due to the advantages of small footprint, little influence from the external environment, safe and reliable operation, and simple maintenance. However, in the process of GIS manufacturing and assembly, some small defects are often left inside the GIS due to problems such as technology, such as metal particles, insulating air gaps, etc. These small defects may develop into dangerous hazards during the operation of the GIS. Discharge channels, and eventually cause insulation breakdown accidents. Therefore, in order to prevent the insulation failure of GIS equipment and ensure the safe operation of the power system, it is in...

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Problems solved by technology

[0004] At present, there are many portable GIS partial discharge detection systems developed based on the combination of acoustic and electric methods. If this type of system adopts frequency reduction processing, it cannot be used for partial discharge positioning due to the low sampling rate.

If it is used for positioning, because the sampling frequency required by ultra-high frequency signals is very high, an ultra-high-speed oscilloscope is generally used as the system hardware platform. Due to the limitation of its onboard storage space, the length of continuous sampling is limited, and it is impossible to obtain enough partial discharges. The pulse signal is used for the analysis of the amplitude and phase distribution spectrum of the discharge, so the discharge diagnosis cannot be performed

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