On-line telemetering device and method for clamping force and temperature of contact and contact finger of isolating switch

Abstract

The invention discloses an on-line telemetering device and method for clamping force and temperature of a contact and a contact finger of an isolating switch. According to the invention, a sensing signal acquisition device is used for acquiring the clamping force and temperature of the contact finger and the contact of the isolating switch in real time and providing a signal source for a signal sending device; a signal transmitting device is connected with a signal receiving terminal through a wireless network; the transmitting frequency of the signal transmitting device is adjustable; a solar power supply device is used for supplying power to a wireless signal acquisition and signal emission device; a set equipment communication protocol is adopted between the signal receiving terminal and a PLC; the PLC sends a message to a host computer through an Ethernet interface via an Ethernet switch; and the host computer operates configuration software, and the configuration software can complete real-time display, storage, query and report output of measurement data and alarm information through a designed man-machine interaction interface. According to the invention, the problem that the clamping force of a static contact cannot be quantified when the isolating switch operates for a long time is solved, and power failure accidents caused by overheating of a conductive loop due to too small clamping force are avoided.

Description

technical field [0001] The invention belongs to the technical field of intelligent substations, and more specifically relates to an on-line telemetry device for the clamping force and temperature of a contact finger of an isolating switch. Background technique [0002] According to the "one-key sequential control" intelligent construction requirements of substations mainly promoted by the State Grid, primary equipment such as isolating switches is required to provide reliable auxiliary signals, which are used as the second criterion for the main control logic judgment. Among them, by detecting the pressure, temperature and other signals between the conductive contact and the finger, it can directly reflect the current working condition of the switch and provide reliable logic signals for the background. [0003] During the long-term operation of the high-voltage disconnector outdoors, due to factors such as the external natural environment and its own design structure, the c...

AI Technical Summary

Problems solved by technology

The disadvantage of prior art document 2 is that the composite sensor is installed at the finger spring, and its detection data is greatly affected by the performance of the spring. At the same time, this solution is only applicable to single-column vertical expansion and horizontal rotation types with finger springs. The isolating switch is not applicable to the isolating switch (GW6 double-arm vertical telescopic type) whose contact pressure comes from material deformation

At the same time, the microcontroller has the disadvantages of complex programming and low interface versatility

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