Wireless passive temperature measurement monitoring method for substation high-voltage switch cabinets

Abstract

The invention discloses a wireless passive temperature measurement monitoring method for substation high-voltage switch cabinets. The method comprises the steps of: (1) integrating UHF electronic tagson temperature measurement sensors, mounting the temperature measurement sensors in the high-voltage switch cabinets by watch pocket type structures, and mounting temperature measurement data acquisition devices communicated with the UHF electronic tags in the high-voltage switch cabinets; (2) by the temperature measurement data acquisition devices, acquiring data measured by each temperature measurement sensor, and uploading the data to a station side management display screen for display; and (3) uploading the data to a remote online monitoring terminal by the station side management display screen, and carrying out centralized monitoring on a temperature condition of each substation high-voltage switch cabinet in a region which needs to be monitored. According to the invention, later maintenance cost of batteries and the sensors is avoided; the wireless passive temperature measurement monitoring method is energy-saving and environmental-friendly; a power supply wire and a data transmission cable are completely omitted; maintenance-free temperature measurement of high-voltage switch equipment can be implemented; power grid accidents are reduced; a trip-out rate of a power grid is reduced; and reliable operation of the power grid is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of wireless passive temperature measurement in substations, and in particular relates to a wireless passive temperature measurement and monitoring method for a high-voltage switchgear in a substation. Background technique [0002] During the long-term operation of the high-voltage switchgear in the substation, the contacts of the switch and the connection of the busbar will heat up due to aging or excessive contact resistance. The connection method of electrical contacts is mainly based on bolt connection. Bolts are generally made of steel, and different metals have different expansion effects. The metal expansion coefficient of steel bolts is much smaller than that of copper and aluminum busbars, especially for bolted equipment joints. During operation, as the load current and temperature change, the expansion and contraction of aluminum or copper and iron will change. There is a difference to produce cree...

AI Technical Summary

Problems solved by technology

There is often an abnormal temperature rise at the bolted joint. The contact resistance increased by each cycle of temperature change will increase the heat of the next cycle, and the increased temperature will further deteriorate the working condition of the joint, thus forming a malignant cycle, resulting in an accident

However, the regular maintenance of the battery power supply method of the existing temperature sensor is not realistic, and the power supply will become one of the bottlenecks hindering the application

When replacing or servicing batteries is inconvenient, expensive or dangerous