Ultrasonic detection device for partial discharge of switchgear based on wireless network

Abstract

The invention relates to ultrasonic detection for partial discharge, and provides a device capable of monitoring changing states of the partial discharge level at any time so as to describe characteristics of partial discharge from a plurality of perspectives. In the technical scheme, a sensor node on the switchgear and a coordinator node form a monitoring network of a tree-type topologic structure through a relay router arranged outside the switchgear; wherein the sensor node comprises an ultrasonic senor, an analog front-end filtration and amplification circuit, an A / D (analog-digital) converter, a sensor node microcontroller MCU module and a sensor node wireless radio-frequency module connected sequentially; and the coordinator node comprises a coordinator wireless radio-frequency module, a coordinator microcontroller MCU module and a coordinator GPRS (general packet radio service) module connected sequentially, wherein the coordinator GPRS module communicates with a GPRS module ofa remote monitoring center. The device is mainly applied in ultrasonic detection of discharge.

Description

technical field [0001] The invention relates to partial discharge ultrasonic detection, in particular to a wireless network-based partial discharge ultrasonic detection device for switch cabinets. Background technique [0002] Electricity is the most important technical basis for production development and social transformation. With the rapid development of my country's economy, the automation construction and transformation of the electric power industry, power supply and electricity enterprises are constantly developing and improving, and the voltage level of electric equipment is also constantly improving. The operational reliability of power equipment has put forward more stringent requirements. [0003] Switchgear is a very important electrical equipment in the power system. Modern power systems have higher and higher requirements for power quality, and accordingly, higher requirements are placed on the reliability of switchgear. The operating state of the switchgear h...

AI Technical Summary

Problems solved by technology

There are many disadvantages in using this wired sensor: ① Due to the large number of monitoring points that need to be positioned in the switch cabinet, multiple sensors need to be installed in the switch cabinet, and it is very difficult to lead out a large number of cables, which not only increases the wiring cost, but also may cause the Insulation damage; ②With the passage of time, some sensors in the switch cabinet will inevitably age or fail, which will lead to the loss of monitoring parameters; ③After the general monitoring system is designed, it is difficult to add and adjust sensors. Configuration changes may require modification of the system software source program

These disadvantages of wired sensors limit the development of switchgear condition monitoring

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