TEV on-line monitoring system for partial discharge of switch cabinet based on Internet of Things

Abstract

The invention discloses a TEV on-line monitoring system for partial discharge of a switch cabinet based on Internet of Things. The TEV on-line monitoring system is characterized by comprising at least one monitoring terminal and an administrative center of the TEV on-line monitoring system, wherein the monitoring terminal performs on-line detection on TEV signals of the partial discharge of the switch cabinet and generates corresponding detection data; the administrative center of the TEV on-line monitoring system is connected with the monitoring terminal through a wireless self-organizing network. The monitoring terminal receives control instructions from the administrative center of the TEV on-line monitoring system through the wireless self-organizing network, and transmits the detection data to the administrative center of the TEV on-line monitoring system according to the instructions, and the administrative center of the TEV on-line monitoring system receives the detection data from the monitoring terminal and analyzes the detection data so as to assess the insulation condition of the switch cabinet.

Description

technical field [0001] The invention relates to a TEV (transient earth voltage) on-line monitoring device, in particular to a switch cabinet partial discharge TEV on-line monitoring system. Background technique [0002] Switchgear is an important part of the power distribution network. 10kV, 35kV and other metal-enclosed complete switchgears are widely used in various substations. The reliability and safety of these switchgear operations determine the reliability and safety of power supply. In the long-term operation of switchgear equipment, there must be insulation degradation caused by electricity, heat, chemistry and abnormal conditions, which will lead to a decrease in electrical insulation strength and even failure. Measuring the partial discharge signal inside the switchgear equipment is an effective method to prevent the insulation failure of the switchgear equipment. [0003] If a partial discharge occurs on a high voltage piece of equipment that is insulated from e...

AI Technical Summary

Problems solved by technology

At present, the most widely used is the TEV detector of the British EA company. This instrument is simple and convenient to use. It detects the partial discharge inside the switchgear by detecting the TEV signal on the surface of the switchgear. However, there are many shortcomings in the application of this type of detection instrument. : (1) The detector is a hand-held detector, which has only one detection channel, and the detection efficiency is low; (2) A large number of switch cabinets need to be inspected regularly, and the detection workload is huge; (3) The hand-held detector has no data storage function and cannot It is convenient to compare and query the historical information of testing; (4) The price of a single detector is expensive and the cost is high; (5) For occasions where it is not suitable for testing personnel to approach (such as on-site pressure test), handheld testing equipment cannot be used

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