Onsite display instrument-based GIS sulfur hexafluoride density online monitoring system

Abstract

The invention discloses an onsite display instrument-based GIS sulfur hexafluoride density online monitoring system. A monitoring pipeline is provided with a gas exporting tee joint; one outlet of the gas exporting tee joint communicates with the gas collecting opening of a sulfur hexafluoride density meter; another outlet of the gas exporting tee joint communicates with the collecting opening of a pressure collecting sensor; the system also includes a horizontally mounted mounting platform, and the sulfur hexafluoride density meter and the pressure collecting sensor are respectively mounted on the mounting platform through mounting flanges, and are vertical to the mounting platform; the mounting platform positioned on the side surface of the sulfur hexafluoride density meter is provided with a wiring terminal strip, and the wiring terminal strip is electrically connected to the signal input channel of an onsite display instrument; and the quantity of SF6 breakers is more than one, and a gas chamber shell of one of the SF6 breakers in the same indoor environment is provided with a temperature sensor used for measuring the gas temperature in the SF6 breaker gas chamber.

Description

technical field [0001] The invention relates to a sulfur hexafluoride density monitoring system, which is specifically used for detecting the sulfur hexafluoride gas density of GIS combined electrical equipment. Background technique [0002] GIS (GAS INSULTED SWITCHGEAR) is the English abbreviation for gas-insulated fully enclosed combined electrical appliances. GIS is composed of circuit breaker, isolating switch, grounding switch, transformer, lightning arrester, bus bar, connector and outlet terminal, etc. These devices or components are all enclosed in a metal grounding shell, and the inside is filled with a certain pressure of SF6 insulating gas , so it is also called SF6 fully enclosed combined electrical appliance. [0003] In GIS, there are many SF6 circuit breakers, so it is of great significance to ensure its reliable operation. [0004] Most of the existing density meters used to monitor SF6 circuit breakers are realized by monitoring temperature and pressure; f...

AI Technical Summary

Problems solved by technology

[0005] In order to improve the monitoring accuracy, the current SF6 density meter is to collect the pressure and temperature after the gas of the SF6 circuit breaker is drawn out through the monitoring pipeline; each SF6 circuit breaker contains multiple devices using sulfur hexafluoride, and each SF6 density meter The collected information will be connected to the main control room through wired transmission; with the increase of the current GIS equipment, the number of SF6 circuit breakers and density meters is also increasing; all wired or wireless separate access to the main control room exists Large unstable factors cause final monitoring errors, which is not conducive to the immediate and accurate detection and prevention of faults;

[0006] At the same time, it can be seen that the above-mentioned gas temperature collection still has the defect of being inconsistent with the gas chamber of the SF6 circuit breaker, because the longer the monitoring pipeline, the greater the difference between the temperature of the gas drawn out and the temperature inside the SF6 circuit breaker

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