Gradient inflatable SF6 gas chamber volume measurement method based on weighing method

Abstract

The invention discloses a gradient inflatable SF6 gas chamber volume measurement method based on a weighing method, belongs to the technical field of SF6 measurement equipment, and solves the problemof how to accurately and precisely measure and calculate the gas amount in an SF6 gas chamber of electrical equipment. A plurality of stages of inflation thresholds are distributed according to a pressure set value of the gas chamber, the gas chamber is inflated in stages, data are measured, the volume of the gas chamber and the internal original gas mass are calculated in each stage, and then theaverage value of the data measured in each stage is taken, so that the problem that when the gas chamber is inflated due to measurement accuracy limitation of a pressure sensor, large accidental errors are caused by one-time measurement from an initial value to a set value is solved, and the accuracy of a calculation result is improved; and the gas real-time pressure can be accurately measured, the inflation flow can be controlled when the gas real-time pressure is close to the set pressure value, the pressure sensor can conduct detection when the gas is stable, detection data are more accurate, and potential safety hazards caused by too high gas pressure due to the fact that the gas chamber is filled with too much gas are avoided.

Description

technical field [0001] The invention belongs to SF 6 Technical field of measuring equipment, related to gradient gas-filled SF based on weighing method 6 Method for the determination of air chamber volume. Background technique [0002] Sulfur hexafluoride (SF 6 ) gas has been widely used in high and medium voltage electrical equipment due to its excellent insulation and arc extinguishing properties. According to statistics, the global sulfur hexafluoride (SF 6 ) gas output is about 20,000 tons, about 80% of which are used in the power industry. With the construction and operation of a large number of AC / DC UHV projects, SF 6 The amount of gas used is increasing. But SF 6 The greenhouse gas is CO 2 It can exist in the air for more than 3200 years. It is one of the six gases prohibited by the Kyoto Protocol. [0003] The amount of sulfur hexafluoride electrical equipment in the power industry is huge, and most of the nameplates of the operating equipment do not indica...

AI Technical Summary

Problems solved by technology

[0006](1) Due to the limitation of the measurement accuracy of the pressure sensor, when inflating the air chamber, if it is charged from the initial value to the set value at one time, a measurement is performed and calculated There must be large accidental errors in the measurement of the volume of the gas chamber and the initial gas quality in the gas chamber, it is difficult to accurately measure the real-time pressure value, and the accuracy of the calculation results is difficult to guarantee

[0007] (2) During the dynamic process of filling gas into the measuring device, because the gas is in a flowing state and the gas pressure is unbalanced, it is difficult for the pressure sensor to judge whether the current pressure has reached The target pressure is prone to measurement errors during the measurement process

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