GIS internal air pressure monitoring device based on temperature sensor

Abstract

The invention discloses a GIS internal air pressure monitoring device based on a temperature sensor. The device comprises a temperature acquisition and transmission module arranged in a GIS and used for temperature acquisition and transmission, and a data display and processing module arranged outside the GIS and used for GIS internal air pressure analysis. The temperature acquisition and transmission module comprises a temperature sensor and a temperature acquisition antenna which are connected in sequence. The data display and processing module comprises a temperature acquisition module, a temperature display unit, a data processing unit and an alarm unit which are connected in sequence. The internal temperature of the GIS is acquired through the temperature acquisition unit, and the gas leakage amount of the GIS is calculated through the temperature rising value according to the relation between the internal gas temperature and air pressure of the GIS. The device has the advantages of being small in size, low in weight, convenient to install, high in accuracy, visual in display, high in stability and high in anti-jamming capacity.

Description

technical field [0001] The invention belongs to the field of intelligent monitoring, in particular to a GIS internal air pressure monitoring device based on a temperature sensor. Background technique [0002] Gas-insulated metal-enclosed switchgear (Gas Insulated Switchgear, gas-insulated switchgear) with SF6 as the insulating medium is a circuit breaker, isolating switch, grounding switch, transformer, lightning arrester, busbar, connecting pipe and transition elements (such as cable head) , air bushing and oil bushing) are fully enclosed in a grounded metal shell, and the shell is filled with SF6 gas as a power distribution device for bonding and arc extinguishing medium. Because GIS equipment has a series of advantages such as small footprint and installation space, unaffected by the natural environment during operation, high reliability, and low maintenance costs, it is widely used in modern power grids. The SF6 gas filled inside has the characteristics of high dielectr...

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Problems solved by technology

[0003] However, the leakage of SF6 gas seriously affects the safe operation of the equipment. The SF6 gas in the equipment is mainly restricted by two factors. One is the content of water vapor in the SF6 gas, which is commonly referred to as humidity or trace moisture. When the standard is seriously exceeded, it may cause an accident along the internal flashover of the insulation, and may also cause the switch insulation to be damp or condensed, thereby greatly reducing its insulation performance; at the same time, the moisture will react with the SF6 decomposition products decomposed by the arc to form corrosion. Strong HF (hydrofluoric acid) and other acidic substances will corrode the metal components in the arc extinguishing chamber of the equipment and the sealing and insulating materials of the equipment, thereby affecting the mechanical properties of the equipment, shortening the service life of the equipment, and reducing its insulation capacity

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