Portable partial discharge detecting and diagnosing device

Abstract

The invention discloses a portable partial discharge detecting and diagnosing device. The device comprises a partial discharge detector, a cable, a pre-sensor and a charger device, wherein the partial discharge detector comprises a lower computer and an upper computer; the lower computer comprises a simulation unit module, an FPGA module, an ARM module, a clock and reset module and a power management module; the upper computer is a Linux industrial personal computer. The portable partial discharge detecting and diagnosing device is provided with a 14-bit 100MHz two-channel acquisition system having the maximum storage depth of 64Mbit; the display of the characteristic spectrum of defects and the model identification of faults can be completed accurately in such a manner of PRPD clustering analysis in combination with impulse waveform time-frequency analysis; meanwhile, a radio-frequency sensor and an ultrahigh-frequency sensor are simultaneously provided, and the pulse current detection and the ultrahigh-frequency detection on primary equipment can be completed by replacing the pre-filter; the device is small in volume, light in weight, and capable of supplying power to a battery and convenient for field live testing and polling of a transformer.

Description

technical field [0001] The invention relates to the field of transformer and GIS state monitoring, in particular to a portable partial discharge detection and diagnosis device. Background technique [0002] Power transformers and GIS are the most important equipment in power transmission and distribution networks, and their operating conditions are directly related to the safe, stable and economical operation of the system. The reliable operation of the power grid depends to a large extent on the manufacturing and installation quality of high-voltage equipment. Once a fault occurs, it will inevitably cause power outages in local or even the whole region. However, there are always different degrees of defects in the internal insulation of power transformers and GIS equipment, such as magazines, moisture, air gaps, small air bubbles, etc. contained in solid or liquid media. Under the long-term action of various operating factors such as electric field changes, temperature cha...

AI Technical Summary

Problems solved by technology

[0004] At present, a large number of partial discharge detection devices have been developed in China. However, comparative analysis shows that the current partial discharge detectors with high sampling rate and strong anti-interference ability have the characteristics of large volume, heavy weight, and data processing based on PC. Not portable, and the detection method is relatively simple

However, partial discharge instruments with portability or multiple detection methods often have a low sampling rate and relatively simple data processing, which is difficult to meet the needs of professionals.

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