System for monitoring contact temperature of high-voltage switch cabinet on line

Abstract

The invention provides a system for monitoring the contact temperature of a high-voltage switch cabinet on line. The system comprises a repeater, a converter and a local workstation, which are connected in sequence, wherein, the repeater is connected with a plurality of slave monitoring units respectively; and the RS-485 standard is applied to the repeater and the converter respectively. The monitoring system of the invention can monitor the temperature rise value of the contact in the high-voltage switch cabinet on a real-time basis under the conditions of high voltage, high temperature and high magnetic field intensity; by detecting the contact temperature of the high-voltage switch cabinet, the temperature rise value obtained through the comparison between the temperatures of an isolated contact and the high-voltage switch cabinet body can be comprehended on a real-time basis, and a real-time alarm can be triggered, thereby avoiding the power failure caused by the isolated contact which is subjected to excessively high temperature rise or even burnt; and meanwhile, the system of the invention can carry out the following operations on data from each sink node: collection, storage, query and report output.

Description

technical field [0001] The invention belongs to the technical field of status monitoring of power transmission and transformation equipment, and relates to an online monitoring system for the contact temperature of a high-voltage switch cabinet. Real-time alarm to avoid excessive temperature rise of isolation contacts, or even burnt out, resulting in power failure. Background technique [0002] At present, trolley-type switch cabinets are commonly used in power transmission and transformation systems, and the switch cabinets and circuit breakers are connected through plugs. If the contacts are in poor contact, the contact resistance of the contacts will increase, the temperature of the contacts will rise, and even the contacts will be burned, resulting in a power outage in the power transmission and transformation system. This phenomenon is particularly prominent in high-current switch cabinets such as incoming cabinets, and has a great impact. In order to avoid power tran...

AI Technical Summary

Problems solved by technology

Its advantage is that the position of the measurement point is not limited, and the installation and arrangement of the sensor is flexible; the disadvantage is that the sensor is not reliable in the environment of high temperature, strong electric field and strong magnetic field, and there is high voltage isolation between the sensor and the host and the sensor's own working power supply The problem

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